Sientra
Annual Report 2015

Plain-text annual report

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2015 OR ☐☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 001-36709 SIENTRA, INC. (Exact Name of Registrant as Specified in its Charter) Delaware  (State or Other Jurisdiction of Incorporation or Organization) 20-5551000  (I.R.S. Employer Identification No.) 420 South Fairview Avenue, Suite 200, Santa Barbara, California  (Address of Principal Executive Offices) 93117  (Zip Code) (805) 562-3500 (Registrant’s Telephone Number, Including Area Code) Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No ☒ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒ Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐ Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒ No ☐ Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☒ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. Large accelerated filer ☐ Non-accelerated filer ☐ (Do not check if a smaller reporting company) Accelerated filer ☒ Smaller reporting company ☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒ The a ggregate market value of registrant's common stock held by non-affiliates of the registrant, based upon the closing price of a share of the registrant's common stock on June 30, 2015 as reported by NASDAQ Global Select Market on such date was approximately $112,745,351 . Shares of the registrant's common stock held by each executive officer, director and holder of 5% or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes. As of March 7, 2016 , there were 18,066,345 shares of the registrant’s common stock, par value $0.01 per share, outstanding. Portions of the registrant’s definitive Prox y Statement relating to its 2016 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Such Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates. DOCUMENTS INCORPORATED BY REFERENCE Table of Contents Table of Contents PART I  Item 1 . Item 4. PART II  Item 5 . Item 6 . Item 7. Item 7A . Item 8 . Item 9 . Item 9A . Item B usiness ......................................................................................................................................................... Risk Factors ................................................................................................................................................. 1A . Item 1B . Item 2 . Item 3 . Item Unresolved Staff Comments ......................................................................................................................... P roperties ................................................................................................................................................... Legal Proceedings ....................................................................................................................................... Mine Safety Disclosures ............................................................................................................................... M arket for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities Selected Financial Data ............................................................................................................................... Management’s Discussion and Analysis of Financial Condition and Results of Operations ............................... Quantitative and Qualitative Disclosure s a bout Market Risk ........................................................................... Financial Statements and Supplementary Data ............................................................................................. Changes in and Disagreements w ith Accountants on Accounting and Financial Disclosure ............................. C ontrols and Procedures ............................................................................................................................. Other Information ......................................................................................................................................... 9B . PART III  Item 10 . Directors, Executive Officers , and Corporate Governance ............................................................................. Item 11 . Item 12 . Executive Compensation ............................................................................................................................... Security Ownership of Certain Benef i cial Owners and Management and Related Stockholder Matters ............. Item Item 13 . Certain Relationships and Related Transactions and Director Independence ................................................. Principal Accountant Fees and Services ....................................................................................................... 14 . PART IV  Item 15 . Exhibits, Financial Statements and Schedule ................................................................................................. Signatures 1 Page 3 20 49 49 49 49 50 52 53 66 66 66 67 67 69 69 69 69 69 70 Table of Contents SPECIAL NOTE REGARDING FORWARD ‑‑LOOKING STATEMENTS This Annual Report on Form 10 ‑K contains forward ‑looking statements within the meaning of Section 27A of the Securities Act, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. These forward ‑looking statements involve risks and uncertainties as well as assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward ‑looking statements. Forward ‑looking statements are often identified by the use of words such as, “anticipate,” “believe,” “may,” “might,” “could,” “will,” “aim,” “estimate,” “continue,” “intend,” “expect,” “plan,” or the negative of those terms, and similar expressions that convey uncertainty of future events or outcomes to identify these forward ‑looking statements. These statements are based on the beliefs and assumptions of our management based on information currently available to management. Such forward ‑looking statements are subject to risks, uncertainties and other important factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward ‑looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in the section titled “ Risk Factors ” included under Part I, Item 1A below. Forward ‑looking statements in this Annual Report on Form 10 ‑K include, but are not limited to, statements about: · · · · · · · · · · · · · · · · · · · · our history of reliance on a foreign, sole source, third ‑party to manufacture and supply our silicone gel breast implants, tissue expanders and other products; the date that our products will return to the U.S. market; the timing and availability of alternative manufacturing sources to supply our silicone gel breast implants, tissue expanders and other products; our history of net operating losses and uncertainty regarding our ability to achieve profitability; our dependence on sales of silicone gel breast implants to generate a significant amount of our net sales; the ability of our products to achieve and maintain market acceptance; our limited operating history and any difficulties encountered by us as a result of being a company early in its commercialization; our ability to successfully commercialize our products; our inability to operate in a competitive industry and compete successfully against competitors that have greater resources than we do; pricing pressure from customers and our competitors; concern about the safety and efficacy of our products, which is based on limited long ‑term clinical data; our ability to comply with the applicable governmental regulations to which our products and operations are subject; our ability to retain a high percentage of our customer base; our ability to expand our sales force and marketing programs; the productivity of our sales representatives and ability to achieve expected growth; our assumptions about the breast implant market; our ability to protect our intellectual property; our ability to successfully defend against certain securities class actions filed against us and our officers; the accuracy of our estimates regarding expenses, net sales, capital requirements and needs for additional financing; and our expectations regarding the period during which we qualify as an emerging growth company under the JOBS Act. We caution you that the risks, uncertainties and other factors referenced above may not contain all of the risks, uncertainties and other factors that are important to you. In addition, we cannot guarantee future results, level of activity, performance or achievements. Any forward ‑looking statement made by us in this Annual Report on Form 10 ‑K speaks only as of the date of this report. Except as required by law, we undertake no obligation to update any forward ‑looking statements, whether as a result of new information, future events or otherwise, after the date of such statements. 2 Table of Contents Item 1.  Busines s Overview PART I We are a medical aesthetics company committed to making a difference in patients’ lives by enhancing their body image, growing their self ‑esteem and restoring their confidence. We were founded to provide greater choice to board ‑certified plastic surgeons and patients in need of medical aesthetics products. We have developed a broad portfolio of products with technologically differentiated characteristics, supported by independent laboratory testing and strong clinical trial outcomes. We sell our breast implants and breast tissue expanders, or Breast Products, exclusively to board ‑certified and board ‑admissible plastic surgeons and tailor our customer service offerings to their specific needs, which we believe helps secure their loya lty and confidence. Our primary products are silicone gel breast implants for use in breast augmentation and breast reconstruction procedures, which we offer in over 195 variations of shapes, sizes , fill volumes and textures. Our breast implants are primarily used in elective procedures which are generally performed on a cash ‑pay basis. Many of our breast implants incorporate one or more differentiated technologies, including a proprietary high ‑strength, cohesive silicone gel and proprietary texturing branded TRUE Texture ® . Our breast implants offer a desired balance between strength, shape retention and softness due to the high ‑strength, cohesive silicone gel used in our manufacturing process. TRUE Texture ® provides texturing on the implant shell that is designed to reduce the incidence of malposition, rotation and capsular contracture. We also offer breast tissue expanders and a range of other aesthetic and specialty products. We do not have any patents or patent applications, but rely on trade secrets, proprietary know ‑how and regulatory barriers to protect our products and technologies. Our breast implants were approved by the U.S. Food and Drug Administration, or FDA, in 2012, based on data we collected from our ongoing, long ‑term clinical trial , or the Study, of our breast implants in 1,788 women across 36 investigational sites in the United States , which included 3,506 implants (approximately 53% of which were smooth and 47% of which were textured) . Our clinical trial is the largest prospective, long ‑term safety and effectiveness pivotal study of breast implants in the United States and included the largest magnetic resonance imaging, or MRI, cohort with 571 patients . The MRI cohort is a subset of study patients that underwent regular MRI screenings in addition to the other aspects of the clinical trial protocol prior to FDA approval. Post-approval, all patients in the Study are subject to serial MRI screening as part of the clinical protocol . The clinical data we collected over a n eight ‑year follow ‑up period demonstrated rupture rates, capsular contracture rates and reoperation rates that were comparable to or better than those of our competitors, at similar time points . In addition to our pivotal study, our clinical data is supported by our Continued Access Study of 2,497 women in the United States. We have also commissioned a number of bench trials run by independent laboratories that we believe further demonstrate the advantages of our breast implants over those of our competitors. We sell our Breast Products exclusively to board ‑certified and board ‑admissible plastic surgeons, as determined by the American Board of Plastic Surgery, who we refer to as Plastic Surgeons. These surgeons have completed the extensive multi ‑year plastic surgery residency training required by the American Board of Plastic Surgery. While aesthetic procedures are performed by a wide range of medical professionals, including dermatologists, otolaryngologists, obstetricians, gynecologists, dentists and other specialists, the majority of aesthetic surgical procedures are performed by Plastic Surgeons. Plastic Surgeons are thought leaders in the medical aesthetics industry. According to the American Society of Plastic Surgeons, or ASPS, there are approximately 6,400 board ‑certified plastic surgeons in the United States. We seek to provide Plastic Surgeons with differentiated services, including enhanced customer service offerings, a ten ‑year limited warranty that is the best ‑in ‑the ‑industry based on providing patients with the largest cash reimbursement for certain out ‑of ‑pocket costs related to revision surgeries in a covered event; a lifetime no ‑charge implant replacement program for covered ruptures; and our industry ‑first CapCon Care Program, or C3 Program, through which we offer no ‑charge replacement implants to breast augmentation patients who experience capsular contracture within the first five years after implantation with our smooth or textured breast implants. We commenced sales of our breast implants in the United States in the second quarter of 2012. Our net sales were $38.1 million, $44.7 million and $35.2 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Our net loss was $41.2 million, $5.8 million and $19.1 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. 3 Table of Contents Between October 9, 2015 and March 1, 2016, we voluntarily suspended the sale of all Sientra devices manufactured by our sole manufacturer and supplier Silimed Industria de Implantes Ltda. (formerly, Silimed-Silicone e Instrumental Medico- Cirugio e Hospitalar Ltda.), or Silimed , due to the suspension of Silimed’s CE certificate by TUV SUD, Silimed’s notified body under EU regulations, followed by Brazilian regulatory inquiries and a temporary suspension by the Brazilian regulatory agency ANVISA and the Department of the Secretary of State of Rio de Janeiro of the manufacturing and shipment of all medical devices made by Silimed, and recommended that plastic surgeons discontinue implanting the devices until further notice. As of March 1, 2016, after ongoing discussions with the FDA and our own review of the matter with the assistance of independent experts in quality management systems, Good Manufacturing Practices, or GMP, and data-based risk assessment, we lifted this temporary hold on sale and also sent a letter to our Plastic Surgeons informing them of our market re-entry plans. In addition, on October 22, 2015, there was a fire in the manufacturing building where Silimed primarily manufactures our breast implants. We are working with Silimed to seek clarity as to the near and long-term capabilities of Silimed’s manufacturing operations. See “Business — Manufacturing and Quality Assurance” and “Risk Factors — Risks Relating to Our Business and Our Industry ” for further detail. Our Market The overall market for medical aesthetic procedures is significant, and awareness and acceptance of these procedures is growing in the United States. According to the American Society for Aesthetic Plastic Surgery, or ASAPS, in 201 4 , consumers in the United States spent approximately $12.4 billion on aesthetic procedures overall, including both surgical and non ‑invasive cosmetic treatment s. Of this amount, more than $7.5 billion was spent on aesthetic surgical procedures. Breast augmentation surgery remains the leading aesthetic surgical procedure by dollars and number of procedures in the United States. According to ASAPS, over 287 ,000 primary breast augmentation procedures and 72 ,000 revision augmentation procedures were perfor med in the United States in 2014 . These procedures provide cosmetic solutions generally to enhance breast size and shape, correct breast asymmetries or help restore fullness after breastfeeding. For breast reconstruction, ASPS estimates that approximately 102 ,000 procedures were performed in the United States in 201 4 . These procedures are a surgical solution generally used to restore a breast to near normal shape and appearance following a mastectomy and typically utilize a breast tissue expander prior to implantation of a breast implant. Based on the number of procedures reported by ASAPS and by ASPS, and our estimates of average selling price, implant mix and implants per procedure, we estimate that the U.S. market for breast implants and breast tissue expanders exceeded $6 30 million in 201 4 . Our Opportunity We believe a significant opportunity exists in the U.S. marketplace due to the high barriers to entry in the U.S. breast implant market and the historical lack of product and service innovation for Plastic Surgeons. For more than 20 years prior to the FDA approval of our breast implants in 2012, only two companies manufactured and distributed breast implants in the United States. We believe that this market concentration is largely a result of the considerable costs and risks associated with the lengthy regulatory approval process required by the FDA, which has created a significant barrier to entry in the U.S. breast implant market. All new breast implants require pre ‑market approval, or PMA, from the FDA before they may be marketed in the United States. The PMA application process is lengthy and uncertain, and the PMA application must be supported by valid scientific evidence, which typically requires long ‑term follow ‑up of a large number of enrolled patients, as well as extensive technical, pre ‑clinical, clinical and manufacturing data to demonstrate safety and effectiveness. At present, we are not aware of any ongoing clinical studies in the United States for silicone gel breast implants other than those post ‑approval studies being performed by us and our two U.S. competitors. We believe that in the near term, it is likely that the companies currently providing silicone gel breast implants in the United States will continue to be the only companies servicing the U.S. silicone breast implant market. We believe the rigorous FDA approval process and the existence of only two competitors in the U.S. market have historically contributed to a lack of technological innovation in the U.S. breast implant industry resulting in limited product choices. Until the FDA approval of our breast implants in 2012 , surgeons in the United States were only able to purchase basic round breast implants from our two U.S. competitors, while surgeons outside of the United States were able to purchase technologically ‑advanced round and anatomically ‑shaped breast implants. 4 Table of Contents Our Competitive Strengths We believe that we are well positioned to take advantage of opportunities afforded by current market dynamics. By focusing on products with technologically differentiated characteristics, demonstrating strong clinical data, offering more product choice and providing services tailored specifically to the needs of Plastic Surgeons, we believe we can continue to enhance our position in the breast implant market. Our competitive strengths include: Differentiated silicone gel and texturing technologies. We incorporate differentiated technologies into our breast implants, including a proprietary high ‑strength, cohesive silicone gel and proprietary texturing branded TRUE Texture ® . Our breast implants offer a desired balance between strength, shape retention and softness due to the high-strength, cohesive silicone gel used in our manufacturing process. In addition, TRUE Texture ® technology provides texturing on the implant shell that is designed to reduce the incidence of malposition, rotation and capsular contracture. We do not have any patents or patent applications, but rely on trade secrets, proprietary know ‑how and regulatory barriers to protect our products and technologies. Strong clinical trial outcomes. Our clinical trial results demonstrate the safety and effectiveness of our breast implants. Our breast implants were approved by the FDA based on data we collected from our ongoing, long ‑term clinical trial of our breast implants in 1,788 women across 36 investigational sites in the United States. The clinical data we collected over an eight- year follow-up period demonstrated rupture rates, capsular contracture rates and reoperation rates that were comparable to or better than those of our competitors, based on our competitors’ published eight ‑year data. Innovative services that deliver an improved customer experience. Our customer service offerings are intended to accommodate and anticipate the needs of Plastic Surgeons so that they can focus on providing better services to their patients. W e provide a ten ‑year limited warranty that is the best ‑in ‑the ‑industry based on providing patients with the largest cash reimbursement for certain out ‑of ‑pocket costs related to revision surgeries in a covered event ; a lifetime no ‑charge implant replacement program for covered rupture s; and our industry ‑first C3 Program through which we offer no ‑charge replacement implants to breast augmentation patients who experience capsular contracture within the first five years after implantation with our smooth or textured breast implants. We also offer specialized educational initiatives and a streamlined ordering, shipping and billing process. Board ‑‑certified plastic surgeon focus. We sell our Breast Products exclusively to board ‑certified and board ‑admissible plastic surgeons who are thought leaders in the medical aesthetics industry. We address the specific needs of Plastic Surgeons through continued product innovation, expansion of our product portfolio and enhanced customer service offerings. We believe that securing the loyalty and confidence of Plastic Surgeons is essential to our success and that our association with Plastic Surgeons enhances our credibility and aligns with our focus on making a difference in patients’ lives. Proven and experienced leadership team. We have a highly experienced management team at both the corporate and operational levels with significant experience in the medical aesthetics industry. Members of our senior management team have extensive experience in the medical aesthetics industry. Our Strategy Our objective is to become a leading global provider of differentiated medical aesthetic products and services tailored to meet the needs of Plastic Surgeons, allowing us to deliver on our commitment to enhance and make a difference in patients’ lives. We are currently focused on growing the breast implant and breast tissue expander markets and our share of them in the United States, and intend to leverage our capabilities into new or complementary aesthetic products or technologies and new geographic markets or market segments. To achieve our objective, we are pursuing the following business strategies: Create awareness of our differentiated technologies, products and services with Plastic Surgeons and consumers. Since we commenced commercial operations , we have focused most of our marketing efforts on Plastic Surgeons to promote and create awareness of the benefits of our products. Among other marketing programs targeted at Plastic Surgeons, we offer educational initiatives exclusively to Plastic Surgeons through our Sientra Education Forums. Recently, we have increased our consumer-directed efforts including an expanded exclusive collaboration with RealSelf.com. We believe that continuing to invest in expanding marketing initiatives will have a positive impact on our business . Selectively pursue acquisitions and expand into new markets . We may selectively pursue domestic and international acquisitions of businesses or technologies that may allow us to leverage our relationships with Plastic 5 Table of Contents Surgeons and our existing commercial infrastructure to provide us with new or complementary products or technologies, and allow us to compete in new geographic markets or market segments or to increase our market share. Broaden our product portfolio and launch new products and services. We plan to continue to develop products that address the unmet needs of Plastic Surgeons and patients by leveraging our innovative technologies in combination with our regulatory and product development expertise. We have a number of new Breast Products under development with different characteristics and configurations. We believe these expanded product choices will allow Plastic Surgeons to potentially achieve better outcomes for their patients. Enhance our sales capabilities and marketing programs to drive adoption of our products. We intend to increase our direct sales capabilities through the hiring of additional, experienced sales representatives and support staff. We believe that continued expansion of our sales team will allow us to broaden our market reach and educate a broader group of Plastic Surgeons on the benefits of our products. Invest in clinical studies and peer reviewed articles with key opinion leaders. We intend to continue to invest in clinical studies in order to provide published peer reviewed articles that support the clinical benefits of our products and technologies over those of our competitors. We believe our relationship with Plastic Surgeons and our continued focus on providing differentiated products and services will allow us to leverage our existing capabilities to increase our share of the breast implant market specifically and the medical aesthetics market generally. Our Products Our portfolio of products has been specifically tailored to the needs of the Plastic Surgeons we serve. We believe that our broad portfolio of products with technologically differentiated characteristics enable Plastic Surgeons to deliver better outcomes for their patients. Breast Augmentation and Breast Reconstruction Products Breast Implants. We offer the following breast implants: · · · Anatomically ‑shaped textured. A full line of textured, anatomically ‑shaped HSC+ breast implants, all of which incorporate our high ‑strength, cohesive silicone gel and TRUE Texture ® technology. Our anatomically ‑shaped implants are engineered for shape retention and feature a gradual upper ‑pole slope and distributed volume that mimics the characteristics of a natural breast. They also provide a desired balance between strength, shape retention and softness and are designed to enhance tissue adherence to reduce malposition and capsular contracture. Due to the unique relationship between our implant gel and our implant shells, our anatomically ‑shaped implants have enhanced ability to retain their shape without sacrificing the desired softness. We offer these anatomically ‑shaped implants in three configurations: round ‑base, classic ‑base and oval ‑base. Our round ‑base implants are available in eight volumes, our classic ‑base implants are available in eight volumes and our oval ‑base implants are available in three projection profiles and 25 volumes. Round textured. A full line of textured, round HSC breast implants, all of which incorporate our high ‑strength, cohesive silicone gel and TRUE Texture ® technology. Our textured, round implants maintain softness and are designed to enhance tissue adherence that reduces malposition and capsular contracture. We offer these textured, round implants in three projection profiles: low, moderate and high. Our low projection implants are available in 15 volumes, our moderate plus projection implants are available in 16 volumes and our high projection implants are available in 14 volumes. Round smooth. A full line of smooth, round HSC and HSC+ breast implants, all of which incorporate our high ‑strength, cohesive silicone gel. Our smooth, round implants are designed to deliver full upper ‑pole aesthetic results without compromising softness. We offer these smooth, round implants in five projection profiles: low, moderate, moderate plus, moderate high and high . Additionally, in the third quarter of 2015 , we introduced two implant projection profiles available in HSC+ gel in 30 new volumes mirroring the existing HSC moderate plus and high projection profiles. Breast Tissue Expanders. We offer a full line of breast tissue expanders, most of which are marketed as ACX, in 25 different shapes and sizes that include single and double chamber tissue expanders. Our double chamber tissue 6 Table of Contents expanders are unique to the marketplace and feature technology that was designed to allow controlled and differentiated expansion of breast tissue. Our breast tissue expanders are used in breast reconstruction and implanted during or after the completion of a mastectomy and before the patient has enough tissue to adequately cover a breast implant. Our breast tissue expanders are temporary devices intended to aid in the process of recreating tissue coverage to allow for the placement of the final implant to reconstruct the breast. Other Products We also offer a range of other aesthetic products that have received 510(k) clearance from the FDA, including: body contouring and other implants, including gluteal, pectoral, calf, facial and nasal implants, and nasal stents, all made from single pieces of silicone elastomer; silicone elastomer oval carving blocks that can be shaped and sized by surgeons to address congenital and other deformities caused by trauma or tumor removal ; scar management products under the brand Medgel that use a compound of biocompatible, medical ‑grade silicone gel or sheeting specifically formulated to treat or prevent various types of scars; temporary, single ‑use, saline ‑filled breast implant sizers that can be used to help identify the correct style and size implant for an individual patient; and non ‑breast tissue expanders, which are temporary devices intended to aid in the process of expanding tissue and skin surface area for burn care and other reconstructive use. · · · · · Our Technology Our current portfolio of breast implants utilizes what we believe are the most advanced technologies currently available on the market. These technologies are supported by rigorous product testing, analytics and clinical data. The advanced technologies in our products include: High ‑‑strength, cohesive silicone gel. Our HSC and HSC+ breast implants offer a desired balance between strength, shape retention and softness due to the high ‑strength, cohesive silicone gel used in our manufacturing process. The use of high ‑strength, cohesive silicone gel in our HSC and HSC+ breast implants allows the breast implants to hold a controlled shape while maintaining a soft feel. The silicone material used in our breast implants has been designed to provide the characteristics desired by Plastic Surgeons for breast implants. At present, we are the only company in the United States that has received FDA approval to use this specific silicone material in our products. We have completed a number of studies conducted by independent laboratories to demonstrate the competitive advantages of using high ‑strength, cohesive silicone gel in our breast implants. We believe this technology differentiates our breast implants for the following reasons: · · · our implant gel is stronger, which is evidenced by its resistance to gel fracture; due to the unique relationship between our implant gel and our implant shells, our implants have an enhanced ability to retain their shape while preserving the shape of anatomically ‑shaped implants without sacrificing the desired softness; and our shaped implants are softer and more elastic than our competitors’ shaped implants. 7 Table of Contents We believe the beneficial properties of our implants arise from the characteristics of the gel, as well as the unique integration of the gel with our implant shell. Inside each of our implants, the gel adheres to the shell, creating additional structural strength and shape retention in the implant. This results in the ability to deliver strength and shaping capability without a stiffer gel or implant and without sacrificing the desired softness. We typically evaluate these characteristics using the following metrics: · Peel ‑force. Peel ‑force is measured by the amount of force, measured in pound ‑force, or lbf, necessary to separate the outer shell of the implant from the intern al gel filling. A greater peel ‑ force measurement indicates greater gel ‑shell integration. In the case of anatomically ‑shaped implants, greater peel ‑force can also be an indication of the ability of the implant to retain its shape, particularly the upper portions of the implant, also referred to as the upper pole. Upper pole stability is of particular importance in preserving the desired anatomical shape of an implant over time. · Gel strength. Gel strength is measured by the amount of force, measured in lbf, required to cause permanent fractures in the gel. A larger value indicates greater strength. · Gel elasticity and implant elasticity. Gel elasticity and implant elasticity can be measured by the level of resistance, measured in millimeters, or mm, to an applied constant force. A higher value represents greater softness and a lower deformation value represents greater firmness. TRUE Texture ® . We sell breast implants that are available with a smooth outer surface or with an outer surface that is textured using TRUE Texture ® technology. We believe our textured breast implants using TRUE Texture ® technology offer us clinical advantages over our competitors’ textured products, including: · · better tissue adherence to reduce the incidence of malposition and rotation; and reduction in the rate of capsular contracture, a complication in which the patient’s body creates a scar ‑tissue capsule around the implant that can tighten and squeeze the implant potentially causing discomfort, pain and even dislocation of the implant. While we have neither sought nor obtained FDA approval to state that TRUE Texture ® technology reduces the incidence of capsular contracture, we believe it may significantly reduce this risk, as evidenced by the lower rates of capsular contraction reported over a five ‑year follow ‑up period in our ongoing clinical trial. On a breast implant, the desired texture should have a proportionate amount of surface disruption, as overly aggressive texture can result in double ‑capsule formation while not enough texturing can result in a lack of adherence resulting in malposition or rotation. We believe that TRUE Texture ® technology has the right combination of surface disruption without overly aggressive texturing. We use the competitive advantages demonstrated by the independent laboratory results above and our clinical results for our breast implants incorporating high ‑strength, cohesive silicone gel and TRUE Texture ® technology to market and differentiate our products to Plastic Surgeons. Our Clinical Data In 2012, our breast implants were approved by the FDA, based on data we co llected from our ongoing, long ‑ term clinical trial of our breast implants in 1,788 women across 36 investigational sites in the United States, which included 3,506 implants (approximately 53% of which were smooth and 47% of which were textured). Our clinical trial results demonstrate the safety and effectiveness of our breast implants and provide Plastic Surgeons and their patients the security and confidence to choose our products. Our clinical trial is the largest prospective, long ‑term safety and effectiveness pivotal study of breast implants in the United States and included the largest magnetic resonance imaging, or MRI, cohort with 571 patients. The MRI cohort is a subset of study patients that underwent regular MRI screenings in addition to the other aspects of the clinical trial protocol prior to FDA approval. Post-approval, all patients in the Study are subject to serial MRI screening as part of the clinical protocol . The clinical data we collected over an eight ‑year follow ‑up period demonstrated rupture rates, capsular contracture rates and reoperation rates that were comparable to or better than those of our competitors, at similar time points. In addition to our pivotal study, our clinical data is supported by our Continued Access Study of 2,497 women in 8 Table of Contents the United States. We have also commissioned a number of bench trials run by independent laboratories that we believe further demonstrate the advantages of our breast implants over those of our competitors. We, and our two competitors were required to run independent ten ‑year clinical studies to obtain PMA approval from the FDA. Our clinical study was not designed to facilitate head ‑to ‑head comparisons. However, our clinical data and our competitors’ clinical data are publicly available to both surgeons and patients who are able to use such data to compare and contra s t competing implants. Our Services Our services are designed to cater to the specific needs of Plastic Surgeons to enable them to maintain and grow their practices. We provide our Plastic Surgeons with superior warranty programs, enhanced customer service offerings and specialized educational initiatives. We believe that tailoring our customer service offerings to Plastic Surgeons helps secure their loyalty and confidence. Industry ‑‑Leading Product Programs and Warranties. Through our C3 Program, we provide no ‑charge replacement implants to patients who experience capsular contracture in the first five years following primary breast augmentation. We provide this benefit to every patient implanted with our smooth or textured breast implants. We also provide a ten ‑year limited warranty that is the best ‑in ‑the ‑industry , based on providing patients with the largest cash reimbursement for certain out ‑of ‑pocket costs related to revision surgeries in a covered event and a lifetime no ‑charge implant replacement program for covered ruptures. Enhanced Customer Service. As we focus exclusively on Plastic Surgeons and their patients, we believe we are able to tailor our customer service offerings to their specific needs. Our surgeon ‑facing customer service policies include: · · · · · · simplified account setup through our sales representatives and with pre ‑qualification and pre ‑approved credit terms; no ‑charge shipping to and from accounts; six ‑month pre ‑approved returns of unused products with no ‑charge return shipping and no restocking fees; end ‑of ‑month statement billing, rather than one invoice per shipment, and 30 ‑day payment terms; individualized consignment inventory; and order acceptance by phone, fax, email or through our sales representatives. Educational and Marketing Initiatives. We have implemented educational and marketing initiatives with a focus on both Plastic Surgeons and their patients considering breast augmentation or reconstruction. Plastic Surgeons. In order to educate Plastic Surgeons about our product lines and, in particular, about the proper use of our anatomically ‑shaped breast implants, we provide a variety of education programs for Plastic Surgeons under the banner of the Sientra Education Forum. · we have developed a tablet ‑based mobile marketing tool for our sales representatives to use while calling on accounts that includes access to our patient and surgeon labeling, published clinical studies, marketing literature, details on our warranty and C3 programs, our educational iBooks and more. · we host symposia with one or more key ‑note speakers who speak on topics ranging from our corporate identity and customer service offerings to surgical tips and suggestions from thought ‑leading Plastic Surgeons. · we produce comprehensive guides for Plastic Surgeons via the Internet, referred to as iBooks, to provide them training and expertise on the implantation of anatomically ‑shaped breast implants. 9 Table of Contents · we send a limited number of Plastic Surgeons to Europe to observe surgeries and train with world ‑renowned surgeons who have been implanting anatomically ‑shaped breast implants for decades and, upon return to the United States, we engage them as consultant ‑educators to conduct tr aining sessions for other U.S. ‑ based Plastic Surgeons. · we periodically sponsor educational surgical preceptorships where a small group of Plastic Surgeons are able to observe a live surgery conducted by one of our trained preceptors and train with that preceptor. Patients. We have been engaging directly with consumers who are considering breast augmentation or reconstruction. We initially focused our consumer educational and marketing activities on websites where consumers come to research their breast augmentation or reconstruction options, including: · · our own consumer website, branded with our “Feel So Good” campaign, that provides resources for consumers considering breast augmentation or reconstruction, including referrals and commentaries, product descriptions, patient planning guides and educational brochures and information regarding our rupture warranty and C3 programs; and our exclusive collaboration with RealSelf, the leading online community helping people make confident choices in elective cosmetic procedures. Together with RealSelf, we deliver fresh and meaningful content to the RealSelf community that answers common questions patients have regarding breast augmentation. This content is featured on a dedicated Sientra page on RealSelf’s website designed to build consumer engagement with the brand and open up the online conversation around breast augmentation directly with Plastic Surgeons. We believe that our innovative services, including industry ‑leading product programs and warranties, enhanced customer service offerings and educational and marketing initiatives, deliver an improved customer experience to Plastic Surgeons and their patients. Sales and Marketing As of December 31, 2015 , we had a sales organization of 51 employees, including sales representatives and sales management. We assign sales territories based on the regions with the highest concentration of accounts. Our sales team is supported by customer and sales experience teams, which provide full ‑time telephonic and email customer support to our sales representatives and customers. In addition, our marketing team leads our efforts in brand development, trade show attendance, educational forums, product messaging, website development and advertising, among others. Research and Development We have incurred, and expect to continue to incur, significant research and development expenses. Our research and development expenses were approximately $7.2 million, $4.7 million and $4.5 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Our research and development expenses primarily consist of costs associated with our clinical and post ‑approval studies, regulatory activity and product development, including our efforts to seek approval for a range of breast implant line extensions that would allow us to sell Breast Products in additional styles, sizes and projections that we do not currently offer. Manufacturing and Quality Assurance All of our products are listed under our FDA Medical Device Establishment Registration and Device Listing where it indicates we are the specification developer of our products, and except for our breast implant sizers , we are the owner of our products’ FDA approvals and clearances. This means that we are primarily responsible for the design, manufacturing and quality assurance of our products. However, we do not manufacture our products ourselves. Instead, we rely on Silimed , our sole source, third-party manufacturer located in Brazil , to manufacture and package our silicone gel breast implants, tissue expanders and other products to our specifications. Silimed has over 35 years of experience manufacturing silicone ‑based implants and distributes its products to over 60 countries worldwide. When we receive our products from Silimed, we inspect a representative sample of packaging and labeling prior to shipping them to our customers. We maintain strategic levels of inventory at our storage facilities located in Santa Barbara, California. 10 Table of Contents We and Silimed are subject to the FDA’s Quality System Regulation, or QSR, reporting requirements and current Good Manufacturing Practices, or cGMP , audits by the FDA. Under the QSR and cGMP requirements, manufacturers, including third party manufacturers, must follow stringent design, testing, production, control, supplier and contractor selection, complaint handling, documentation and other quality assurance procedures during all aspects of the manufacturing process. Both Silimed and us have been inspected by the FDA regularly, and no FDA Form 483 observations, which are issued when an FDA inspector has observed any conditions that in his or her judgment may constitute violations of the Food Drug and Cosmetic Act and related Acts, or FD&C, may be in violation of FDA’s requirements. Silimed has had four FDA inspections in 14 years and is also audited periodically by our quality department to ensure conformity with the specifications, policies and procedures for our products. At present, except for our breast implant sizers, all of our products, including our silicone gel breast implants and breast tissue expanders, are manufactured by Silimed pursuant to an amended and restated exclusivity agreement with Silimed , which we refer to as the Silimed Agreement. Pursuant to the Silimed Agreement, Silimed manufactures and supplies products ordered by us for distribution in the United States and Canada, which we refer to as the Territory. We agreed to use commercially reasonable efforts to promote, sell and distribute the products in the Territory. In addition to Silimed’s existing products, we have the exclusive right to sell and distribute any new products manufactured by Silimed during the term of the Silimed Agreement. Silimed sells the products to us at a fixed cost, which may be increased by no more than a low single ‑digit percentage per annum. The Silimed Agreement provides that Silimed will not provide its products to any third party in the Territory, with the exception of the distribution of its gastric and urology products pursuant to pre ‑existing supply agreements that it has with third ‑party distributors, and we have agreed not to sell Silimed’s products to any third party if we have reason to believe that such products have been or will be distributed outside of the Territory. We have also agreed not to distribute any product that directly competes with a product manufactured by Silimed in the Territory. In the event Silimed fails to supply products ordered by us, we may, under certain circumstances, exercise manufacturing rights to manufacture the products directly or through a third party manufacturer. Pursuant to the Silimed Agreement, Silimed granted to us an exclusive, royalty ‑free, non ‑transferable license to use certain of its trademarks in the Territory, including in the event Silimed fails to supply the products to us and in connection with the marketing and sale of the products in the Territory. In addition, the Silimed Agreement allocates intellectual property rights between the parties, including that the parties will jointly own all developments, modifications, enhancements or alterations of products jointly created by the parties, subject to certain restrictions concerning the use of such improvements outside of the Territory. Each party is subject to certain limitations and other restrictions on the transfer of the other party’s technology to third parties. The Silimed Agreement can be terminated by either party under certain limited circumstances, including in connection with the other party’s breach of any of its material obligations which such breaching party fails to cure within 60 days of receiving notice from the non ‑breaching party. If the breach relates only to single product, then the non ‑breaching party is entitled to terminate the agreement with respect to that specific product. The parties may also terminate the agreement at any time on a product ‑by ‑product basis upon mutual written agreement of the parties. The term of the Silimed Agreement will continue until April 2017. Several recent events have occurred which have affected our ability to rely on Silimed as our source for our silicone gel breast implants, tissue expanders and other products in the short and long term, including the suspension of Silimed’s CE certificate by TUV SUD, Silimed’s notified body under EU regulation, relating to particles on Silimed breast products , followed by Brazilian regulatory inquiries and a temporary suspension by the Brazilian regulatory agency ANVISA and the Department of the Secretary of State of Rio de Janeiro of the manufacturing and shipment of all medical devices made by Silimed, including products manufactured for Sientra. As a result of this suspension, between October 9, 2015 and March 1, 2016, we voluntarily placed a temporary hold on the sale of all Sientra devices manufactured by Silimed and recommended that plastic surgeons discontinue implanting the devices until further notice . As of March 1, 2016, after ongoing discussions with the FDA and our own review of the matter with the assistance of independent experts in quality management systems, GMP and data-based risk assessment, we lifted this temporary hold on sale and also sent a letter to our Plastic Surgeons informing them of our market re- entry plans. In addition, on October 22, 2015, there was a fire in the manufacturing building where Silimed primarily manufactures Sientra’s breast implants. We are working with Silimed to seek clarity as to the near and long-term capabilities of Silimed’s manufacturing operations, including the status of equipment that is used to manufacture breast 11 Table of Contents implants and the potential feasibility, production capacity and timing related to Silimed’s ability to manufacture our breast implants. Competition The medical device industry is intensely competitive, subject to rapid change and highly sensitive to the introduction of new products or other market activities of industry participants. We primarily compete with two companies that manufacture and sell breast implants in the United States: Johnson & Johnson through its wholly owned subsidiary, Mentor Worldwide, LLC, or Mentor, and Allergan plc, or Allergan. Both of our U.S. competitors are either publicly ‑traded companies or divisions or subsidiaries of publicly ‑traded companies with significantly more market share and resources than we have. These companies have greater financial resources for sales, marketing and product development, broader established relationships with healthcare providers and third ‑party payors, and larger and more established distribution networks. In some instances, our competitors also offer products that include features that we do not currently offer. For example, Allergan sells temporary gel sizers for silicone gel implants and we sell only temporary saline filled sizers. In addition, our competitors may offer pricing programs with discounts across their non ‑breast aesthetic product portfolios. We also face potential future competition from a number of companies, medical researchers and existing medical device companies that may be pursuing new implant technologies, new material technologies and new methods of enhancing and reconstructing the breast. We believe the primary competitive factors in our markets include: · · · · · · breadth of portfolio; technological characteristics of products; clinical evidence; product price; customer service; and support by key opinion leaders. Government Regulation Our products are medical devices subject to extensive regulation by the FDA and other federal and state regulatory authorities, Health Canada and, if we commence international sales outside of the United States and Canada, other regulatory bodies in other countries. Regulation by the FDA. The Federal Food, Drug and Cosmetic Act, or FDCA, and the FDA’s implementing regulations govern, among other things: · · · · · · · product design and development; pre ‑clinical and clinical testing; establishment registration and product listing; product manufacturing; product labeling and storage; pre ‑market clearance or approval; post ‑market studies; 12 Table of Contents · · · · · · advertising and promotion; product sales and distribution; recordkeeping and device tracking; complaint handling; recalls and field safety corrective actions; and post ‑market device malfunctions. surveillance and adverse event reporting, including reporting of deaths, serious injuries or Unless an exemption applies, each new or significantly modified medical device we seek to commercially distribute in the United States will require either a pre ‑market notification to the FDA requesting permission for commercial distribution under Section 510(k) of the FDCA, also referred to as a 510(k) clearance, or approval from the FDA of a pre ‑market approval, or PMA, application. Both the 510(k) clearance and PMA approval processes can be expensive, lengthy and require payment of significant user fees, unless an exemption is available. The FDA classifies medical devices into one of three classes. Unless specifically exempted from certain requirements, all three classes of devices are subject to general controls such as labeling, pre ‑market notification and adherence to the FDA’s Quality System Regulation, or QSR, which cover manufacturers’ methods and documentation of the design, testing, production, control, quality assurance, labeling, packaging, sterilization, storage and shipping of products. Devices deemed to pose low to moderate risk are placed in Class I or II, which, absent an exemption, requires the manufacturer to obtain a 510(k) clearance. Class II devices are subject to special controls such as performance standards, post ‑market surveillance, FDA guidelines, or particularized labeling requirements, as well as general controls. Some low risk devices are exempted by regulation from the 510(k) clearance requirement, and/or the requirement of compliance with substantially all of the QSR. A PMA application is required for devices deemed by the FDA to pose the greatest risk, such as life ‑sustaining, life ‑ supporting or certain implantable devices, including all breast implants, or devices that are “not substantially equivalent” either to a device previously cleared through the 510(k) process or to a “preamendment” Class III device in commercial distribution in the United states before May 28, 1976 for which a regulation requiring a PMA application has not been issued by the FDA. Our tissue expanders and our body contouring, facial and nasal implants received FDA clearance as Class II devices at various dates prior to approval of our breast implants in March 2012. To obtain 510(k) clearance, we must submit a pre ‑market notification demonstrating that the proposed device is substantially equivalent to a previously cleared 510(k) device or a preamendment device. The FDA’s 510(k) clearance pathway usually takes from three to 12 months from the date the application is completed, but it can take significantly longer and clearance is never assured. Although many 510(k) pre ‑market notifications are cleared without clinical data, in some cases, the FDA requires significant clinical data to support substantial equivalence. In reviewing a pre ‑market notification, the FDA may request additional information, including clinical data, which may significantly prolong the review process. After a device receives 510(k) clearance, any modification that could significantly affect its safety or effectiveness, or that would constitute a new or major change in its intended use, will require a new 510(k) clearance or, depending on the modification, could require a PMA application. The FDA requires each manufacturer to make this determination initially, but the FDA can review any such decision and can disagree with a manufacturer’s determination. If the FDA disagrees with a manufacturer’s determination regarding whether a new pre ‑market submission is required for the modification of an existing device, the FDA can require the manufacturer to cease marketing and/or recall the modified device until 510(k) clearance or approval of a PMA application is obtained. If the FDA requires us to seek 510(k) clearance or approval of a PMA application for any modifications to a previously cleared product, we may be required to cease marketing or recall the modified device until we obtain this clearance or approval. In addition, in these circumstances, we may be subject to significant regulatory fines or penalties for failure to submit the requisite PMA application(s). In addition, the FDA is currently evaluating the 510(k) process and may make substantial changes to industry requirements. Silicone gel ‑filled breast implants are treated as Class III devices and a full PMA is required. A PMA for our breast implants was approved by the FDA in March 2012. The PMA application process is generally more costly and time consuming than the 510(k) process and requires proof of the safety and effectiveness of the device to the FDA’s satisfaction. Accordingly, a PMA application must be supported by valid scientific evidence that typically includes, but is 13 Table of Contents not limited to, extensive technical information regarding device design and development, pre ‑clinical and clinical trial data, and manufacturing and labeling information to demonstrate to the FDA’s satisfaction the safety and effectiveness of the device for its intended use. After a PMA application is submitted and found to be sufficiently complete, the FDA begins an in ‑depth review of the submitted information. By statute, the FDA has 180 days to review the “accepted application,” although, generally, review of the application takes between one and three years, but may take significantly longer. During this review period, the FDA may request additional information or clarification of information already provided. Also during the review period, an advisory panel of experts from outside the FDA may be convened to review and evaluate the application and provide recommendations to the FDA as to the approvability of the device. In addition, the FDA generally will conduct a pre ‑approval inspection of the manufacturing facility to evaluate compliance with QSR, which requires manufacturers to implement and follow elaborate design, testing, control, documentation and other quality assurance procedures in the device design and manufacturing process. The FDA may approve a PMA application with post ‑approval conditions intended to ensure the safety and effectiveness of the device including, among other things, restrictions on labeling, promotion, sale and distribution and collection of long ‑term follow ‑up data from patients in the clinical study that supported approval. Failure to comply with the conditions of approval can result in materially adverse enforcement action, including the loss or withdrawal of the approval. New PMA applications or PMA application supplements are required for significant modifications to the manufacturing process, labeling and design of a device that could affect the safety or effectiveness of the device, including, for example, certain types of modifications to the device’s indication for use, manufacturing process, labeling and design. PMA supplements often require submission of the same type of information as a PMA application, except that the supplement is limited to information needed to support any changes from the device covered by the original PMA application, and may not require as extensive clinical data or the convening of an advisory panel, depending on the nature of the proposed change. Clinical Trials. A clinical trial is almost always required to support a PMA application and may be required for a 510(k) pre ‑market notification. In the United States, absent certain limited exceptions, human clinical trials intended to support product clearance or approval require an Investigational Device Exemption, or IDE, application. Some types of studies deemed to present “non ‑significant risk” are deemed to have an approved IDE once certain requirements are addressed and institutional review board, or IRB, approval is obtained. If the device presents a “significant risk” to human health, as defined by the FDA, the Sponsor must submit an IDE application to the FDA and obtain IDE approval prior to commencing the human clinical trials. The IDE application must be supported by appropriate data, such as animal and laboratory testing results, showing that it is safe to evaluate the device in humans and that the testing protocol is scientifically sound. The IDE application must be approved in advance by the FDA for a specified number of subjects, unless the product is deemed a non ‑significant risk device and eligible for more abbreviated IDE requirements. Clinical trials for a significant risk device may begin once the IDE application is approved by the FDA and the responsible institutional review boards at the clinical trial sites. There can be no assurance that submission of an IDE will result in the ability to commence clinical trials. Additionally, after a trial begins, the FDA may place it on hold or terminate it if, among other reasons, it concludes that the clinical subjects are exposed to unacceptable health risks that outweigh the benefits of participation in the study. During a study, we are required to comply with the FDA’s IDE requirements for investigator selection, clinical trial monitoring, reporting, record keeping and prohibitions on the promotion of investigational devices or making safety or efficacy claims for them. We are also responsible for the appropriate labeling and distribution of investigational devices. Our clinical trials must be conducted in accordance with FDA regulations and federal and state regulations concerning human subject protection, including informed consent and healthcare privacy. The investigators must also obtain patient informed consent, rigorously follow the investigational plan and study protocol, control the disposition of investigational devices and comply with all reporting and recordkeeping requirements. The FDA’s grant of permission to proceed with clinical testing does not constitute a binding commitment that the FDA will consider the study design adequate to support clearance or approval. In addition, there can be no assurance that the data generated during a clinical study will meet chosen safety and effectiveness endpoints or otherwise produce results that will lead the FDA to grant marketing clearance or approval. Other Regulatory Requirements. Even though our breast implants have been approved and commercialized, numerous regulatory requirements apply after a device is placed on the market, regardless of its classification or pre ‑market pathway. These include, but are not limited to: · establishment registration and device listing with the FDA; 14 Table of Contents · QSR, which requires manufacturers, including third-party manufacturers, to follow stringent design, testing, production, control, supplier and contractor selection, complaint handling, documentation and other quality assurance procedures during all aspects of the manufacturing process; · labeling regulations that prohibit the promotion of products for uncleared or unapproved, or “off ‑label,” uses, and impose other restrictions on labeling, advertising and promotion; · medical Device Reporting, or MDR, regulations, which require that manufacturers report to the FDA if their device may have caused or contributed to a death or serious injury or malfunctioned in a way that would likely cause or contribute to a death or serious injury if the malfunction were to recur; and · corrections and removals reporting regulations, which require that manufacturers report to the FDA field corrections and product recalls or removals if undertaken to reduce a risk to health posed by the device or to remedy a violation of the FDCA that may present a risk to health. In addition, the FDA may order a mandatory recall if there is a reasonable probability that the device would cause serious adverse health consequences or death. Also, the FDA requires us to conduct post ‑market surveillance studies and to maintain a system for tracking our breast implants through the chain of distribution to the patient level. The FDA and the Food and Drug Branch of the California Department of Health Services enforce regulatory requirements by conducting periodic, unannounced inspections and market surveillance. Inspections may include the manufacturing facilities of our subcontractors. Failure by us or our manufacturer to comply with applicable regulatory requirements can result in enforcement actions by the FDA and other regulatory agencies. These may include, but may not be limited to, any of the following sanctions or consequences: · warning letters or untitled letters that require corrective action; · · · · · · · · · fines and civil penalties; unanticipated expenditures; delays in or refusal to grant requests for 510(k) clearance or pre ‑market approval of new products or modified products; FDA refusal to issue certificates to foreign governments needed to export products for sale in other countries; suspension or withdrawal of FDA clearance or approval; product recall, detention or seizure; operating restrictions, partial suspension or total shutdown of production; injunctions and consent decrees; and criminal prosecution. We and our contract manufacturers and some suppliers of components or device accessories also are required to manufacture our products in compliance with cGMP requirements set forth in the QSR. The QSR requires a quality system for the design, manufacture, packaging, labeling, storage, installation and servicing of marketed devices, and it includes extensive requirements with respect to quality management and organization, device design, buildings, equipment, purchase and handling of components or services, production and process controls, packaging and labeling controls, device evaluation, distribution, installation, complaint handling, servicing, and record keeping. The FDA evaluates compliance with the QSR through periodic, unannounced inspections that may include the manufacturing facilities of our subcontractors. If the FDA believes that we or any of our contract manufacturers or regulated suppliers are not in compliance with these requirements, it can shut down our manufacturing operations, require recall of our products, refuse 15 Table of Contents to approve new marketing applications, institute legal proceedings to detain or seize products, enjoin future violations or assess civil and criminal penalties against us or our officers or other employees. Healthcare Regulatory Laws. Our business activities, including but not limited to, research, sales, marketing, promotion, distribution, medical education and other activities are subject to regulation under additional healthcare laws by numerous regulatory and enforcement authorities in the United States, in addition to the FDA. These laws include, without limitation, state and federal anti ‑kickback , false claims, physician sunshine , and patient data privacy and security laws and regulations, including but not limited to those described below. Additionally, our relationships with healthcare providers and other third parties are subject to scrutiny under these laws. Non ‑compliance with the laws described below may generally result in the imposition of civil, criminal and administrative penalties, damages, monetary fines, disgorgement, individual imprisonment, possible exclusion from participation in Medicare, Medicaid and other federal healthcare programs, contractual damages, reputational harm, diminished profits and future earnings, and curtailment of our operations, any of which could adversely affect our ability to operate our business and our results of operations. Defending against any actions for non ‑compliance of such laws can be costly, time ‑ consuming and may require significant financial and personnel resources. Therefore, even if we are successful in defending against any such actions that may be brought against us, our business may be impaired. Federal Anti ‑‑Kickback Law. The federal Anti ‑Kickback Statute prohibits, among other things, knowingly or willfully soliciting, receiving, offering, or paying remuneration, directly or indirectly, to induce, or in return for, either the referral of an individual or the purchase, or recommendation, order or furnishing of an item or service reimbursable under a federal healthcare program, such as the Medicare and Medicaid programs. The definition of “remuneration” has been broadly interpreted to include anything of value, including such items as improper payments, gifts, discounts, the furnishing of supplies or equipment, credit arrangements, waiver of payments and providing anything at less than its fair market value. There are a number of statutory exceptions and regulatory safe harbors protecting certain common activities from prosecution. Failure to meet all of the requirements of a particular applicable statutory exception or regulatory safe harbor does not make the conduct per se illegal under the federal Anti ‑Kickback Statute. Instead, the legality of the arrangement will be evaluated on a case ‑by ‑case basis based on a cumulative review of all of its facts and circumstances. The penalties for violating the federal Anti ‑Kickback Statute include imprisonment for up to five years, fines of up to $25,000 per violation and possible exclusion from federal healthcare programs such as Medicare and Medicaid. Further, a person or entity does not need to have actual knowledge of this statute or specific intent to violate it in order to commit a violation . In addition, a claim including items or services resulting from a violation of the federal Anti ‑Kickback Statute constitutes a false or fraudulent claim for purposes of the federal civil False Claims Act, or FCA. We have entered into consulting, speaker and other financial arrangements with physicians, including some who prescribe or recommend our products to patients. We engage such physicians as consultants, advisors and to educate other physicians. Noncompliance with the federal Anti ‑Kickback Statute could result in the penalties set forth above. Federal Civil False Claims Act. The FCA, prohibits any person from knowingly presenting, or causing to be presented, a false claim for payment to the federal government, or knowingly making, using or causing to be made or used, a false record or statement material to a false or fraudulent claim to the federal government. The FCA has been used to prosecute persons submitting claims for payment that are inaccurate or fraudulent, that are for services not provided as claimed, or for services that are not medically necessary. Manufacturers can be held liable under the FCA if they are deemed to “cause” the submission of false or fraudulent claims by, for example, providing inaccurate billing or coding information to customers or promoting a product off ‑label. Penalties for FCA violations include three times the actual damages sustained by the government, plus mandatory civil penalties of between $5,500 and $11,000 for each separate false claim, the potential for exclusion from participation in federal healthcare programs, and, although the federal FCA is a civil statute, FCA violations may also implicate various federal criminal statutes. In addition to actions initiated by the government itself, the statute authorizes actions to be brought on behalf of the federal government by a private party having knowledge of the alleged fraud, known as “qui tam” whistleblower lawsuits. Because the complaint is initially filed under seal, the action may be pending for some time before the defendant is even aware of the action. If the government intervenes and is ultimately successful in obtaining redress in the matter, or if the plaintiff succeeds in obtaining redress without the government’s involvement, then the plaintiff will receive a percentage of the recovery. Qui tam actions have increased significantly in recent years, causing greater numbers of 16 Table of Contents healthcare companies to have to defend a false claim action, pay fines or be excluded from Medicare, Medicaid or other federal or state healthcare programs as a result of an investigation arising out of such action. Federal Criminal False Claims Law s . The federal criminal false claims laws prohibit, among other things, knowingly and willfully making, or causing to be made, a false statement or representation of a material fact for use in determining the right to any benefit or payment under a federal health care program. A violation of these laws may constitute a felony or misdemeanor and may result in fines or imprisonment. Civil Monetary Penalties Law. The f ederal Civil Monetary Penalties Law prohibits, among other things, the offering or transferring of remuneration to a Medicare or Medicaid beneficiary that the person knows or should know is likely to influence the beneficiary’s selection of a particular supplier of Medicare or Medicaid payable items or services. Noncompliance can result in civil money penalties of up to $10,000 for each wrongful act, assessment of three times the amount claimed for each item or service and exclusion from the federal healthcare programs. Health Insurance Portability and Accountability Act of 1996. The Health Insurance Portability and Accountability Act of 1996, or HIPAA, augmented two federal crimes: healthcare fraud and false statements relating to healthcare matters. The healthcare fraud statute prohibits knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program, including private payors. A violation of this statute is a felony and may result in fines, imprisonment or exclusion from governmental programs. The false statements statute prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items or services. A violation of this statute is a felony and may result in fines or imprisonment. HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH, and their implementing regulations, including the F inal HIPAA O mnibus R ule published on January 25, 2013, mandates, among other things, that certain types of entities and individuals adopts uniform standards for the electronic exchange of information in common healthcare transactions, as well as standards relating to the privacy and security of individually identifiable health information, which require the adoption of administrative, physical and technical safeguards to protect such information. Among other things, HITECH makes certain of HIPAA’s standards and requirements directly applicable to “business associates”— independent contractors or agents of covered entities that create, receive or obtain protected health information in connection with providing a service for or on behalf of a covered entity. HITECH also increased the civil and criminal penalties that may be imposed against covered entities and business associates, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorney’s fees and costs associated with pursuing federal civil actions. In addition, certain state laws govern the privacy and security of health information in certain circumstances, some of which are more stringent than HIPAA and many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts. Failure to comply with these laws, where applicable, can result in the imposition of significant civil and/or criminal penalties. Physician Payments Sunshine Act. The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, or collectively, PPACA, imposed, among other things, new annual reporting requirements for certain manufacturers of drugs, devices, biologics, and medical supplies for which payment is available under Medicare, Medicaid, or the Children’s Health Insurance Program, for certain payments and “transfers of value” provided to physicians and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members. Failure to submit timely, accurately, and completely the required information for all payments, transfers of value and ownership or investment interests may result in civil monetary penalties of up to an aggregate of $150,000 per year and up to an aggregate of $1 million per year for “knowing failures , ” for all payments, transfers of value or ownership or investment interests that are not timely, accurately, and completely reported in an annual submission. We are required to report detailed payment data and submit legal attestation to the accuracy of such data by March 31st of each calendar year . In addition, there has been a recent trend of increased federal and state regulation of payments and other transfers of value provided to healthcare professionals and entities. Similar to the federal law, certain states also have adopted marketing and/or transparency laws relevant to device manufacturers, some of which are broader in scope. Certain states, such as California and Connecticut, also mandate that device manufacturers implement compliance programs. Other states, such as Massachusetts and Vermont, impose restrictions on device manufacturer marketing practices and require tracking and reporting of gifts, compensation, and other remuneration to healthcare professionals and entities. The need to build 17 Table of Contents and maintain a robust compliance program with different compliance and/or reporting requirements increases the possibility that a healthcare company may violate one or more of the requirements, resulting in fines and penalties Additional State Healthcare Laws. Many states have also adopted some form of each of the aforementioned laws, some of which may be broader in scope and may apply regardless of payor. Nevertheless, a determination of liability under such laws could result in fines and penalties and restrictions on our ability to operate in these jurisdictions. Additionally, as some of these laws are still evolving, we lack definitive guidance as to the application of certain key aspects of these laws as they relate to our arrangements with providers with respect to patient training. We cannot predict the final form that these regulations will take or the effect that the final regulations will have on us. As a result, our provider and training arrangements may ultimately be found to be not in compliance with applicable laws. United States Foreign Corrupt Practices Act. The United States Foreign Corrupt Practices Act, or FCPA, prohibits United States corporations and their representatives from offering, promising, authorizing or making corrupt payments, gifts or transfers to any foreign government official, government staff member, political party or political candidate in an attempt to obtain or retain business abroad. The scope of the FCPA would include interactions with certain healthcare professionals in many countries. International Regulation. We may evaluate international expansion opportunities in the future. International sales of medical devices are subject to local government regulations, which may vary substantially from country to country. The time required to obtain approval in another country may be longer or shorter than that required for FDA approval, and the requirements may differ. There is a trend towards harmonization of quality system standards among the European Union, United States, Canada and various other industrialized countries. The primary regulatory body in Europe is that of the European Union, which includes most of the major countries in Europe. Other countries, such as Switzerland, have voluntarily adopted laws and regulations that mirror those of the European Union with respect to medical devices. The European Union has adopted numerous directives and standards regulating the design, manufacture, clinical trials, labeling and adverse event reporting for medical devices. Devices that comply with the requirements of a relevant directive will be entitled to bear the CE conformity marking, indicating that the device conforms to the essential requirements of the applicable directives and, accordingly, can be commercially distributed throughout Europe. The method of assessing conformity varies depending on the class of the product, but normally involves a combination of self ‑assessment by the manufacturer and a third party assessment by a “Notified Body.” This third ‑party assessment may consist of an audit of the manufacturer’s quality system and specific testing of the manufacturer’s product. An assessment by a Notified Body of one country within the European Union is required in order for a manufacturer to commercially distribute the product throughout the European Union. Additional local requirements may apply on a country ‑by ‑country basis. Outside of the European Union, regulatory approval would need to be sought on a country ‑by ‑country basis in order for us to market our products. Coverage and Reimbursement. Sales of our products depend, in part, on the extent to which the procedures using our products will be covered by third ‑party payors, such as government health care programs, commercial insurance and managed healthcare organizations. Breast augmentation procedures are generally performed on a cash ‑pay basis and are not covered by third ‑party payors. In contrast, breast reconstruction procedures may be covered by third ‑party payors, but such third ‑party payors are increasingly limiting coverage and reducing reimbursements for medical products and services. In addition, the U.S. government, state legislatures and foreign governments have continued implementing cost ‑containment programs, including price controls, restrictions on coverage and reimbursement. Third-party payors are increasingly challenging the price, examining the medical necessity and reviewing the cost-effectiveness of medical drug products and medical services, in addition to questioning their safety and efficacy. Adoption of price controls and cost ‑containment measures, and adoption of more restrictive policies in jurisdictions with existing controls and measures, could further limit our net sales and results. Moreover, t he process for determining whether a third-party payor will provide coverage for a product or procedure may be separate from the process for establishing the reimbursement rate that such a payor will pay for the product or procedure . A payor’s decision to provide coverage for a product or procedure does not imply that an adequate reimbursement rate will be approved. Further, one payor’s determination to provide coverage for a product or procedure does not assure that other payors will also provide coverage for the product or procedure . Adequate third-party reimbursement may not be available to enable us to maintain price levels sufficient to ensure profitability . 18 Table of Contents Health Reform. The United States and some foreign jurisdictions are considering or have enacted a number of legislative and regulatory proposals to change the healthcare system in ways that could affect our business. Among policy makers and payors in the United States and elsewhere, there is significant interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs, improving quality or expanding access. By way of example, in the United States, the recent implementation of PPACA is an example that has the potential to substantially change healthcare financing and delivery by both governmental and private insurers, and significantly impact the pharmaceutical and medical device industries. The PPACA imposed, among other things, a new federal excise tax of 2.3% on certain entities that manufacture or import medical devices for sale in the United States and implemented payment system reforms including a national pilot program on payment bundling to encourage hospitals, physicians and other providers to improve the coordination, quality and efficiency of certain healthcare services through bundled payment models. The medical device excise tax has been suspended by the Consolidated Appropriations Act of 2016, or the CAA, with respect to medical device sales during calendar years 2016 and 2017. Absent further Congressional action, this excise tax will be reinstated for medical device sales beginning January 1, 2018. The CAA also temporarily delays implementation of other taxes intended to help fund PPACA programs. The full impact of the PPACA on our business remains unclear. There have been judicial and Congressional challenges to certain aspects of the PPACA, and we expect there will be additional challenges and amendments in the future. In addition, other legislative changes have been proposed and adopted since the PPACA was enacted. On August 2, 2011, President Obama signed into law the Budget Control Act of 2011, which, among other things, created the Joint Select Committee on Deficit Reduction to recommend to Congress proposals in spending reductions. The Joint Select Committee did not achieve a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, triggering the legislation’s automatic reduction to several government programs. This includes reductions to Medicare payments to providers of 2% per fiscal year, which went into effect on April 1, 2013, following passage of the Bipartisan Budget Act of 2015, and will stay in effect through 2025 unless Congressional action is taken. On January 2, 2013, President Obama signed into law the American Taxpayer Relief Act of 2012, or the ATRA, which, among other things, further reduced Medicare payments to several providers, including hospitals. We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced demand for our products or additional pricing pressure. Intellectual Property Our intellectual property portfolio consists primarily of trademarks and trade secrets and does not presently consist of any patents or patent applications. We do not currently intend to file any patent applications in the United States or elsewhere. Our trademark portfolio consists of five registered U.S. trademarks and six pending Canadian trademark applications. We maintain a program to protect our marks and will institute legal action where necessary to prevent others from using and registering confusingly similar marks. In addition, to protect our trade secrets and other intellectual property rights, we have entered into confidentiality agreements with third parties, and confidential information and invention assignment agreements with employees, consultants and advisors. However, there can be no assurance that these measures will be successful in any given case and third parties may still obtain this information or we may be unable to protect our rights. Employees As of December 31, 2015 , we had 96 full ‑time employees. None of our employees are represented by a collective bargaining agreement, and we have never experienced any work stoppage. We believe we have good relations with our employees. 19 Table of Contents Facilities Our headquarters located in Santa Barbara, California is approximately 20,000 square feet. The term of the lease for our headquarters expires in February 2020. We also lease warehouse space located in Santa Barbara, California, which is approximately 10, 000 square feet . The term of the lease for our warehouse expire s in January 2019 . Legal Proceedings On September 25, 2015, a lawsuit styled as a class action of our stockholders was filed in the United States District Court for the Central District of California. The lawsuit names us and certain of our officers as defendants and alleges violations of Sections 10(b) and 20(a) of the Exchange Act in connection with allegedly false and misleading statements concerning o ur business, operations, and prospects. The plaintiff seeks damages and an award of reasonable costs and expenses, including attorneys’ fees. On November 24, 2015, three stockholders (or groups of stockholders) filed motions to appoint lead plaint i ff(s) and to approve their selection on lead counsel. On December 10, 2015, the court entered an order appointing lead plaintiffs and approving their selection of lead counsel. On February 19, 2016, lead plaintiffs filed their consolidated amended complaint. On October 28, November 5, and November 19, 2015, three la wsuits styled as class actions of our stockholders were filed in the Superior Court of California for the County of San Mateo. The lawsuits name us , certain of our officers and directors, and the underwriters associated with our follow-on public offering that closed on September 23, 2015 as defendants. The lawsuits allege violations of Sections 11, 12(a)(2), and 15 of the Securities Act in connection with allegedly false and misleading statements in o ur offering documents associated with the follow-on offering concerning o ur business, operations, and prospects. The plaintiffs seek damages and an award of reasonable costs and expenses, including attorneys’ fees. On December 4, 2015, defendants removed all three lawsuits to the United States District Court for the Northern District of California. On December 15 and December 16, 2015, plaintiffs filed motions to remand the lawsuits back to San Mateo Superior Court , or Motions to Remand. On January 19, 2016, defendants filed their opposition to the Motions to Remand, and plaintiffs filed their reply in support of the Motions to Remand on January 26, 2016. It is possible that additional suits will be filed, or allegations made by stockholders, with respect to these same or other matters and also naming us and/or our officers and directors as defendants. We believe we have meritorious defenses and intend to defend these lawsuits vigorously. Due to the early stage of these proceedings, we are not able to predict or reasonably estimate the ultimate outcome or possible losses relating to these claims. Seasonality We expect that, in the future, our net sales will fluctuate on a quarterly basis due to a variety of factors, including seasonality of breast augmentation procedures. We believe that breast implant sales are subject to seasonal fluctuation due to breast augmentation patients’ planning their surgery leading up to the summer season and in the period around the winter holiday season. Corporate Information We incorporated in Delaware on August 29, 2003 under the name Juliet Medical, Inc. and subsequently changed our name to Sientra, Inc. in April 2007. Our principal executive offices are located at 420 South Fairview Avenue, Suite 200, Santa Barbara, California, 93117, and our telephone number is (805) 562 ‑3500. Our website is located at www.sientra.com, and our investor relations website is located at http://investors.sientra.com . Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, reports on Form 8-K and our Proxy Statements are available through our investor relations website, free of charge, as soon as reasonably possible after we file them with the SEC. Item 1A.  Risk Factor s You should carefully consider the following risk factors, as well as the other information appearing elsewhere in this Annual Report on Form 10-K , including our financial statements and related notes, before deciding whether to purchase, hold or sell shares of our common stock. The occurrence of any of the following risks could harm our business, financial condition, results of operations and/or growth prospects or cause our actual results to differ materially from those contained in forward-looking statements we have made in this report and those we may make from time to time. You should consider all of the risk factors described when evaluating our business. 20 Table of Contents Risks Relating to Our Business and Our Industry We currently rely on a foreign, sole source, third-party to manufacture and supply our silicone gel breast implants, tissue expanders and other products. We currently rely on Silimed , our sole source, third-party manufacturer located in Brazil, to manufacture and supply our silicone gel breast implants, tissue expanders and other products. Several recent events have occurred which affect our ability to rely on Silimed as our source for our silicone gel breast implants, tissue expa nders and other products in the short and long term. On September 23, 2015, the Medicines and Healthcare Products Regulatory Agency, or the MHRA, an executive agency of the U.K., issued a press release announcing the suspension of sales and implanting in U.K . of all medical devices manufactured by Silimed following the suspension of the CE certificate of these products issued by TUV SUD, Silimed’s notified body under EU regulation. The suspension of Silimed’s CE certificate by TUV SUD followed TUV SUD’s inspection at Silimed’s manufacturing facilities in Brazil, relating to particles on Silimed breast products . On October 2, 2015, the Brazilian regulatory agency ANVISA and the Department of the Secretary of State of the State of Rio de Janeiro announced that while they continue to review the technical compliance related to GMP of Silimed’s manufacturing facility, and as a precautionary measure , they temporarily suspended the manufacturing and shipment of all medical devices made by Silimed, including products manufactured for Sientra. Between October 9, 2015 and March 1, 2016, we voluntarily placed a temporary hold on the sale of all Sientra devices manufactured by Silimed and recommended that plastic surgeons discontinue implanting the devices until further notice. The Company has been in ongoing discussions with the FDA regarding European and Brazilian regulatory inquiries into Silimed products, and conduct ed its own review of the matter with the assistance of independent experts in quality management systems, GMP and data-based risk assessment. After extensive independent, third-party testing and analyses indicated no anticipated significant safety concerns with the use of our products, including our breast implants, as of March 1, 2016, we lifted the temporary hold on the sale of our devices manufactured by Silimed and also sent a letter to our Plastic Surgeons informing them of the Company’s market re-entry plans. Breast implants have stringent standards for manufacturing and robust quality systems, but there is no specific or defined standard for particles on breast implants. Each of the FDA, ANVISA and MHRA noted that no risks to patient health have been identified in connection with implanting Silimed products, and, accordingly, there is no need to adopt any procedure or action for those patients who have received them. Additionally, the FDA and ANVISA indicated that that there have been no reports of adverse events related to th is issue . On January 27, 2016, after completing an analysis and risk assessment, ANVISA announced their authoriz ation of Silimed to resume the commercialization and use of its previously manufactured products. ANVISA concluded there was no evidence that the presence of surface particles on the silicone implants represented risks which are additional to the ones inherent in the product. However, Silimed continues to be suspended from manufacturing and commercializing new batches of implants until an inspection is performed to reassess the fulfillment of its GMP compliance . Additionally, t he suspension of Silimed’s CE certificate by TUV SUD , and the suspension on the commercialization of Silimed’s products in Europe by the MHRA remains in place and the determination of Silimed’s manufacturing facilities is still under evaluation, and we cannot predict the outcome of these matter s . The FDA and other U.S. and foreign regulatory agencies have substantial discretion to require additional testing, to impose restrictions on marketed products or on us, including the withdrawal or recall of such products from the market. If Silimed is unable to resume manufacturing or becomes unwilling to manufacture and supply our silicone gel breast implants, tissue expanders and other products, we will not be able to replace Silimed quickly, and although we are exploring our strategic alternatives, we have not qualified another manufacturer to source our implants. Even if we were able to identify a replacement manufacturer for our silicone gel breast implants, tissue expanders and other products, the replacement manufacturer would have to be qualified with the FDA, which is an expensive and time- consuming process during which we may experience a supply interruption. There can be no guarantee that Silimed , or an alternative manufacturer, will be able to meet our demand to manufacture and supply our products in a timely manner, and as a result, our financial position and results of operations may be adversely affected. 21 Table of Contents In addition, our reliance on Silimed involves a numbe r of other risks, including that: · our products may not be manufactured in accordance with agreed upon specifications or in compliance with regulatory requirements, or Silimed’s manufacturing facilities may not be able to maintain compliance with regulatory requirements, which could negatively affect the safety or efficacy of our products or cause delays in shipments of our products; · we may not be able to timely respond to unanticipated changes in customer orders, and if orders do not match forecasts, we may have excess or inadequate inventory of materials and components; · our current contract with Silimed expires in less than two years, in 2017, and there can be no assurance that Silimed will agree to continue to manufacture and supply our products after the expiration of our contract; · we may be subject to price fluctuations when a supply contract is renegotiated or if our existing contract is not renewed; · our agreement with Silimed does not permit us to sell the products we obtain from Silimed in any country other than the United States and Canada; · we or Silimed may lose access to critical services and components, resulting in an interruption in the manufacture or shipment of our products; · we may not be able to find an alternate supplier in a timely manner if the products remain unavailable from Silimed; · we may be required to obtain regulatory approvals related to any change in our supply chain; · · Silimed may discontinue manufacturing and supplying products to us for risk management reasons; and Silimed may encounter financial or other hardships unrelated to our demand for products, which could inhibit its ability to fulfill our orders and meet our requirements. Although we have resumed our sale and implanting of devices manufactured by Silimed, t he suspension of the sale and manufacturing of Silimed’s products by foreign regulatory agencies, our uncertainty regarding the resolution of the regulatory inquiries and the delay of sales pending such resolution, and the materialization of any other of these risks could significantly increase our costs, our ability to generate net sales would be impaired, market acceptance of our products could be adversely affected and customers may instead purchase or use our competitors’ products, which could materially adversely and severely affect our business, financial condition and results of operations. Our sole source, third-party manufacturer, Silimed, relies on a sole source, third-party supplier of the medical-grade silicone used in its silicone gel breast implants, tissue expanders and other products. Our sole source, third-party manufacturer and supplier, Silimed, relies on Applied Silicone Corporation, or ASC, its sole source, third-party supplier of medical-grade silicone based in Santa Paula, California, for the silicone gel used in its breast implants, tissue expanders and other products. If ASC becomes unable or unwilling to supply medical-grade silicone to Silimed, Silimed may not be able to find an alternate supplier in a timely manner, since the availability of suppliers of medical-grade silicone is limited. In addition, ASC may discontinue manufacturing and supplying products to Silimed for risk management reasons, lose access to critical services and components, resulting in an interruption in the manufacturing or shipment of our products, or encounter financial or other hardships unrelated to Silimed and our demand for products, which could inhibit its ability to fulfill Silimed’s orders. We may also be required to obtain regulatory approvals related to any change in our supply chain. The materialization of any of these risks could adversely affect our business, financial condition and results of operations. 22 Table of Contents The fire at one of Silimed’s manufacturing buildings may have a severe impact on our results of operations, financial position and market share. On October 22, 2015, there was a fire at one of Silimed’s two manufacturing buildings in Rio de Janeiro, Brazil. The fire occurred in the building where Sientra’s breast implants are primarily manufactured, or building F2. Silimed has indicated to us that a smaller production facility in Silimed’s second building, or building F1, which was not impacted by the fire, has the potential to be modified for breast implant manufacturing. In order to commence the manufacturing of breast implants, certain areas in building F1 would need to be reconfigured and receive certification and approval by appropriate regulatory bodies. We are working with Silimed to seek clarity as to the near and long-term capabilities of Silimed’s manufacturing operations, including the status of equipment that is used to manufacture breast implants and the potential feasibility, production capacity and timing related to Silimed’s ability to manufacture our breast implants. The delay in the manufacturing of our breast implants caused by the fire, our uncertainty regarding when Silimed’s facility will be operational and able to manufacture our breast implants, and the extent of the damage caused by the fire may have a severe impact on our business, financial condition and results of operations. We depend on a positive reaction from our Plastic Surgeons and their patients to successfully re-enter the market after our voluntary suspension of the sale of Sientra devices manufactured by Silimed. On March 1, 2016, we lifted the voluntary temporary hold on sale of all Sientra products manufactured by Silimed and also sent a letter to our Plastic Surgeons informing them of our market re-entry plans. Although our market re-entry decision was based on extensive and detailed independent third party reviews of our finished goods inventory, which concluded that our implants continue to be a safe choice for both our surgeons and their patients, consistent with their FDA approval status in 2012, we depend on a positive reception from our Plastic Surgeons and their patients to be able to reestablish the market position we had prior to the voluntary suspension. Our re-entry into the market requires us to effectively and responsibly educate accounts on the results of our testing and reconfirm our strong clinical data, while providing the same high levels of customer service to which our Plastic Surgeons are accustomed. Our Plastic Surgery Consultants are working diligently to solidify the trust and support of all our Plastic Surgeons during this important phase of our market re-entry, however, if we are not successful in re-establishing these relationships, adapting our business systems, or competing effectively in this market, our sales revenues, market share and financial performance will be affected negatively. We have incurred significant net operating losses since inception and cannot assure you that we will achieve profitability. Since our inception, we have incurred significant net operating losses. As of December 31, 2015 , we had an accumulated deficit of $175.3 million. To date, we have financed our operations primarily through sales of preferred stock, borrowings under our term loans, sales of our products since 2012, our initial public offering and our recent follow-on public offering of our common stock. We have devoted substantially all of our resources to the acquisition and clinical development of our products, the commercial launch of our products, the development of a sales and marketing team and the assembly of a management team to manage our business. We commenced sales of our breast implants in the second quarter of 2012. For the year ended December 31, 2015 , our gross profit was $27.5 million. However, although we have achieved a positive gross profit, we had a net loss of $41.2 million for the year ended December 31, 2015 . The extent of our future operating losses and the timing of profitability are uncertain, especially in light of our voluntary hold of the sale of all Sientra devices manufactured by Silimed between October 9, 2015 and March 1, 2016. We will need to generate significant sales to achieve profitability, and we might not be able to do so. Even if we do generate significant sales, we might not be able to achieve, sustain or increase profitability on a quarterly or annual basis in the future. If our sales grow more slowly than we have forecasted, or if our operating expenses exceed our forecasts , our financial performance and results of operations will be adversely affected. Our future profitability depends on the success of our Breast Products. Sales of our Breast Products accounted for 98% , 97% and 97% of our net sales for the year s ended December 31, 2015 , 2014 and 2013 , respectively. We expect our net sales to continue to be based primarily on sales of our Breast Products, and between October 9, 2015 and March 1, 2016, we stopped selling our Breast Products as a result of our voluntary hold on the sale of all Sientra devices manufactured by Silimed. Our voluntary hold on the sale of Sientra devices 23 Table of Contents manufactured by Silimed, the potential loss of market acceptance of our Breast Products, and any adverse rulings by regulatory authorities, including an adverse or time consuming resolution of the current regulatory inquiries regarding Silimed’s medical devices, any adverse publicity or other adverse events relating to us or our Breast Products, or the introduction of competitive products by our competitors and other third parties, may significantly impact our sales and profitability, which would adversely affect our business, financial condition and results of operations. Any negative publicity concerning our products could harm our business and reputation and negatively impact our financial results. The responses of potential patients, physicians, the news media, legislative and regulatory bodies and others to information about complications or alleged complications of our products, including the suspension of Silimed’s CE certificate by TUV SUD, and the subsequent suspension by ANVI SA on the manufacturing and shipment of all medical devices made by Silimed, including products manufactured for Sientra while they review the technical compliance related to GMP of Silimed’s manufacturing facility, could result in negative publicity and could materially reduce market acceptance of our products. These responses or any investigations and potential resulting negative publicity may have a material adverse effect on our business and reputation and negatively impact our financial condition, results of operations or the market price of our common stock. In addition, significant negative publicity could result in an increased number of product liability claims against us. There are inherent risks in contracting with manufacturers located outside of the United States such as in Brazil. Silimed is our sole source, third-party manufacturer and its manufacturing plant is located in Brazil. There are inherent risks in contracting with manufacturers located outside of the United States such as in Brazil, including the risks of economic change, recession, labor strikes or disruptions, political turmoil, new or changing tariffs or trade barriers, new or different restrictions on importing or exporting, civil unrest, infrastructure failure, cultural differences in doing business, lack of contract enforceability, lack of protection for intellectual property, war and terrorism. If any of these risks were to materialize, we and Silimed would both be materially adversely affected and our business, financial condition and results of operations would suffer. Various factors outside our direct control may adversely affect manufacturing and supply of our breast implants, tissue expanders and other products. Manufacturing and supply of our breast products is technically challenging. Changes that our manufacturer may make outside the purview of our direct control can have an impact on our processes, on quality and the successful delivery of products to Plastic Surgeons. Mistakes and mishandling are not uncommon and can affect production and supply. Some of these risks include: tissue expanders and other implants, · · · · · failure of our manufacturer to follow cGMP requirements or mishandling of our products while in production or in preparation for transit; transportation and import and export risk, particularly given the global nature of our supply chain; delays in analytical results or failure of analytical techniques that we depend on for quality control and release of products; natural disasters, labor disputes, financial distress, lack of raw material supply, issues with facilities and equipment or other forms of disruption to business operations affecting our manufacturer or its suppliers; and latent defects that may become apparent after products have been released and which may result in a recall of such products. The materialization of any of these risks could significantly increase our costs, impair our ability to generate net sales, and adversely affect market acceptance of our products and customers may instead purchase or use our competitors’ products, which could materially adversely and severely affect our business, financial condition and results of operations. 24 Table of Contents We may not realize the benefits of partnerships with other companies, acquisitions of complementary products or technologies or other strategic alternatives. From time to time, we may consider opportunities to partner with or acquire other businesses, products or technologies that may enhance our product platform or technology, expand the breadth of our markets or customer base or advance our business strategies. Potential partnerships or acquisitions involve numerous risks, including: · integration of the acquired products or technologies with our existing business; · maintenance of uniform standards, procedures, controls and policies; · · · · unanticipated costs associated with partnerships or acquisitions; diversion of management’s attention from our existing business; uncertainties associated with entering new markets in which we have limited or no experience; and increased legal and accounting costs relating to the partnerships or acquisitions or compliance with regulatory matters. We do not know if we will be able to identify partnerships or acquisitions we deem suitable, whether we will be able to successfully complete any such partnerships or acquisitions on favorable terms or at all, or whether we will be able to successfully integrate any partnered or acquired products or technologies. Our potential inability to integrate any partnered or acquired products or technologies effectively or realize anticipated synergies may adversely affect our business, financial condition and results of operations. We have a limited operating history and may face difficulties encountered by companies early in their commercialization in competitive and rapidly evolving markets. We commenced operations in 2007 and began commercializing silicone gel breast implants in the second quarter of 2012. Accordingly, we have a limited operating history upon which to evaluate our business and forecast our future net sales and operating results. In assessing our business prospects, you should consider the various risks and difficulties frequently encountered by companies early in their commercialization in competitive markets, particularly companies that develop and sell medical devices. These risks include our ability to: · · · implement and execute our business strategy; expand and improve the productivity of our sales force and marketing programs to grow sales of our existing and proposed products; increase awareness of our brand and build loyalty among Plastic Surgeons; · manage expanding operations; · · · · · respond effectively to competitive pressures and developments; enhance our existing products and develop new products; obtain regulatory clearance or approval to enhance our existing products and commercialize new products; perform clinical trials with respect to our existing products and any new products; and attract, retain and motivate qualified personnel in various areas of our business. Due to our limited operating history, we may not have the institutional knowledge or experience to be able to effectively address these and other risks that we may face. In addition, we may not be able to develop insights into trends 25 Table of Contents that could emerge and negatively affect our business and may fail to respond effectively to those trends. As a result of these or other risks, we may not be able to execute key components of our business strategy, and our business, financial condition and operating results may suffer. If we fail to compete effectively against our competitors, both of which have significantly greater resources than we have, our net sales and operating results may be negatively affected. Our industry is intensely competitive and subject to rapid change from the introduction of new products, technologies and other activities of industry participants. Our competitors, Mentor, a wholly owned subsidiary of Johnson & Johnson, and Allergan are well-capitalized global pharmaceutical companies that have been the market leaders for many years and have the majority share of the breast implant market in the United States. These competitors also enjoy several competitive advantages over us, including: · · · · · · · greater financial and human resources for sales, marketing and product development; established relationships with health care providers and third-party payors; established reputations and name recognition among health care providers and other key opinion leaders in the plastic surgery industry; in some cases, an established base of long-time customers; products supported by long-term clinical data; larger and more established distribution networks; greater ability to cross-sell products; and · more experience in conducting research and development, manufacturing, performing clinical trials and obtaining regulatory approval or clearance. If we fail to compete effectively against our competitors, our net sales and operating results may be negatively affected. Pricing pressure from customers and our competitors may impact our ability to sell our products at prices necessary to support our current business strategies. Our 2012 entry into the U.S. breast implant market represented a significant expansion of the breast implant choices and technologies available in the United States. As a result of our entry into the U.S. breast implant market, our competitors intensified competitive pricing pressure for traditional round-shaped breast implants. If we are not successful in convincing customers or third-party payors of the differentiation of the gel technology used in our implants and selection of shapes and products as compared to our competitors’ products, third-party payors may not cover or adequately reimburse our products and customers may choose our competitors’ products. The long-term safety of our products has not fully been established and our breast implants are currently under study in our PMA post-approval studies, which could reveal unanticipated complications. We currently market our silicone gel breast implants in the United States. These products have received pre-market approval from the FDA. However, there could still be unanticipated complications or unforeseen health consequences of being implanted with our silicone gel breast implants over the long-term (defined as 10 years or more). Additionally, we rely on our clinical data to make favorable comparisons of our product to our competitive products, and our longer term data may change over time. Further, future studies or clinical experience may indicate that treatment with our products is not differentiated to treatment with competitive products. Such results could slow the adoption of our products and significantly reduce our sales, which could prevent us from achieving our forecasted sales targets or achieving or sustaining profitability. Moreover, if long-term results and experience indicate that our products cause unexpected or 26 Table of Contents serious complications, we could be subject to mandatory product recalls, suspension or withdrawal of FDA clearance or approval and significant legal liability. If we are unable to train Plastic Surgeons on the safe and appropriate use of our products, we may be unable to achieve our expected growth. An important part of our sales process includes the ability to educate Plastic Surgeons about the availability of anatomically-shaped breast implants and train Plastic Surgeons on the safe and appropriate use of our products. If we become unable to attract potential new Plastic Surgeon customers to our education and training programs, we may be unable to achieve our expected growth. There is a learning process involved for Plastic Surgeons to become proficient in the use of our anatomically-shaped products. It is critical to the success of our commercialization efforts to train a sufficient number of Plastic Surgeons and provide them with adequate instruction in the appropriate use of our products via preceptorships and additional demonstration surgeries. This training process may take longer than expected and may therefore affect our ability to increase sales. Following completion of training, we rely on the trained Plastic Surgeons to advocate the benefits of our products in the marketplace. Convincing Plastic Surgeons to dedicate the time and energy necessary for adequate training is challenging, and we cannot assure you that we will be successful in these efforts. If Plastic Surgeons are not properly trained, they may misuse or ineffectively use our products. This may also result in, among other things, unsatisfactory patient outcomes, patient injury, negative publicity or lawsuits against us, any of which could have an adverse effect on our business and reputation. If we are unable to continue to enhance our existing Breast Products and develop and market new products that respond to customer needs and preferences and achieve market acceptance, we may experience a decrease in demand for our products and our business could suffer. We may not be able to compete effectively with our competitors, and ultimately satisfy the needs and preferences of our customers, unless we can continue to enhance existing products and develop and market new innovative products. Product development requires the investment of significant financial, technological and other resources. Product improvements and new product introductions also require significant planning, design, development and testing at the technological, product and manufacturing process levels and we may not be able to timely develop product improvements or new products. Our competitors’ new products may beat our products to market, be more effective with new features, obtain better market acceptance or render our products obsolete. Any new or modified products that we develop may not receive clearance or approval from the FDA, or achieve market acceptance or otherwise generate any meaningful sales or profits for us relative to our expectations based on, among other things, existing and anticipated investments in manufacturing capacity and commitments to fund advertising, marketing, promotional programs and research and development. If changes in the economy and consumer spending, reduce consumer demand for our products, our sales and profitability would suffer. We are subject to the risks arising from adverse changes in general economic and market conditions. Certain elective procedures, such as breast augmentation and body contouring, are typically not covered by insurance. Adverse changes in the economy may cause consumers to reassess their spending choices and reduce the demand for these surgeries and could have an adverse effect on consumer spending. This shift could have an adverse effect on our net sales. Furthermore, consumer preferences and trends may shift due to a variety of factors, including changes in demographic and social trends, public health initiatives and product innovations, which may reduce consumer demand for our products. We are required to maintain high levels of inventory, which could consume a significant amount of our resources and reduce our cash flows. We need to maintain substantial levels of inventory to protect ourselves from supply interruptions, provide our customers with a wide range of shapes and sizes of our breast implants, and account for the high return rates we experience as Plastic Surgeons typically order our products in multiple sizes for a single surgery and then return what they do not use. As a result of our substantial inventory levels, we are subject to the risk that a substantial portion of our inventory becomes obsolete. T he materialization of any of these risks may have a material adverse effect on our earnings and cash flows due to the resulting costs associated with the inventory impairment charges and costs required to replace such inventory . 27 Table of Contents Additionally, the suspension of Silimed’s manufacturing by ANVISA, the recent fire at Silimed’s facility that manufactures our breast implants, including the status of equipment that is used to manufacture such implants and the potential feasibility, production capacity and timing related to Silimed’s ability to manufacture breast implants in other facilities, or our ability to find an alternate supplier in a timely manner, may affect our ability to maintain the level of inventory supply we require to protect ourselves from supply interruptions which could have an unfavorable i mpact on our net sales . Any disruption at our facilities could adversely affect our business and operating results. Our principal offices are located in Santa Barbara, California. Substantially all of our operations are conducted at this location, including customer service, development and management and administr ative functions. S ubstantially all of our inventory of finished goods is held at a second location in Santa Barbara, California. Despite our efforts to safeguard our facilities, including acquiring insurance, adopting health and safety protocols and utilizing off-site storage of computer data, vandalism, terrorism or a natural or other disaster, such as an earthquake, fire or flood, could damage or destroy our inventory of finished goods, cause substantial delays in our operations, result in the loss of key information and cause us to incur additional expenses. Our insurance may not cover our losses in any particular case. In addition, regardless of the level of insurance coverage, damage to our facilities may have a material adverse effect on our business, financial condition and operating results. If there are significant disruptions in our information technology systems, our business, financial condition and operating results could be adversely affected. The efficient operation of our business depends on our information technology systems. We rely on our information technology systems to effectively manage sales and marketing data, accounting and financial functions, inventory, product development tasks, clinical data, and customer service and technical support functions. Our information technology systems are vulnerable to damage or interruption from earthquakes, fires, floods and other natural disasters, terrorist attacks, computer viruses or hackers, power losses, and computer system or data network failures. In addition, a variety of our software systems are cloud- based data management applications hosted by third-party service providers whose security and information technology systems are subject to similar risks. The failure of our or our service providers’ information technology could disrupt our entire operation or result in decreased sales, increased overhead costs and product shortages, all of which could have a material adverse effect on our reputation, business, financial condition and operating results. We may be adversely affected by earthquakes or other natural disasters and our business continuity and disaster recovery plans may not adequately protect us from a serious disaster. Our corporate headquarters and other facilities are located in Santa Barbara, California, which in the past has experienced both severe earthquakes and wildfires. We do not carry earthquake insurance. Earthquakes, wildfires or other natural disasters could severely disrupt our operations, and have a material adverse effect on our business, results of operations, financial condition and prospects. If a natural disaster, power outage or other event occurred that prevented us from using all or a significant portion of our headquarters, that damaged critical infrastructure, such as our enterprise financial systems or manufacturing resource planning and enterprise quality systems, or that otherwise disrupted operations, it may be difficult or, in certain cases, impossible for us to continue our business for a substantial period of time. The disaster recovery and business continuity plans we have in place currently are limited and are unlikely to prove adequate in the event of a serious disaster or similar event. We may incur substantial expenses as a result of the limited nature of our disaster recovery and business continuity plans, which, particularly when taken together with our lack of earthquake insurance, could have a material adverse effect on our business. Failure to obtain hospital or group purchasing organization contracts could have a material adverse effect on our financial condition and operating results. A portion of our net sales is derived from sales to hospitals. Many hospital customers, through the contracting process, limit the number of breast implant suppliers that may sell to their institution. Hospitals may choose to contract with our competitors who have a broader range of products that can be used in a wider variety of procedures or our 28 Table of Contents competitors may actively position their broader product portfolios against us during the hospital contracting process. Any limitations on the number of hospitals to which we can sell our products may significantly restrict our ability to grow. In addition, contracts with hospitals and group purchasing organizations, or GPOs, often have complex insurance and indemnification requirements, which may not be beneficial to us, or we may not be able to successfully negotiate contracts with a substantial number of hospitals and GPOs at all, which could adversely affect our business, financial condition and results of operations. Our business could suffer if we lose the services of key personnel or are unable to attract and retain additional qualified personnel. We are dependent upon the continued services of key personnel, including members of our executive management team who have extensive experience in our industry. The loss of any one of these individuals could disrupt our operations or our strategic plans. On November 12, 2015, Hani Zeini stepped down as our President and Chief Executive Officer and Jeffrey Nugent was appointed as our Chairman and Chief Executive Officer. On February 16, 2016, Mr. Zeini resigned from our board of director s . The announcement of the departure of Mr. Zeini from our board and as President and Chief Executive Officer may have a negative effect on employee morale and on our customer relationships which is potentially mitigated by his continuing consultancy with the Company. Additionally, our future success will depend on, among other things, our ability to continue to hire and retain the necessary qualified sales, marketing and managerial personnel, for whom we compete with numerous other companies, academic institutions and organizations. If we lose additional key employees, if we are unable to attract or retain other qualified personnel, or if our management team is not able to effectively manage us through these events, our business, financial condition, and results of operations may be adversely affected. We will need to increase the size of our organization, and we may experience difficulties in managing growth. As of December 31, 2015 , we had approximately 96 full-time employees. Our management and personnel, and the systems and facilities we currently have in place, may not be adequate to support future growth. Effectively executing our growth strategy requires that we increase net sales through sales and marketing activities, recruit and retain additional employees and continue to improve our operational, financial and management controls, reporting systems and procedures. If we are not able to effectively expand our organization in these ways, we may not be able to successfully execute our growth strategy, and our business, financial condition and results of operations may suffer. Risks Related to Our Financial Results Our quarterly net sales and operating results are unpredictable and may fluctuate significantly from quarter to quarter due to factors outside our control, which could adversely affect our business, results of operations and the trading price of our common stock. Our net sales and operating results may vary significantly from quarter to quarter and year to year due to a number of factors, many of which are outside of our control and any of which may cause our stock price to fluctuate. Our net sales and results of operations will be affected by numerous factors, including: · · · · · the length of time that Silimed is unable to manufacture our Breast Products as a result of ANIVSA’s suspension of the manufacturing operations and the fire at Silimed’s facility; the timing and availability of alternative manufacturing sources to supply our silicone gel breast implants, tissue expanders and other products; the impact of the buying patterns of patients and seasonal cycles in consumer spending; our ability to drive increased sales of anatomically-shaped breast implants products; our ability to establish and maintain an effective and dedicated sales organization; 29 Table of Contents · · · · · · · · · · · · · · pricing pressure applicable to our products, including adverse third-party coverage and reimbursement outcomes; results of clinical research and trials on our existing products; the impact of the recent regulatory inquiries of Silimed’s medical devices on our brand and reputation; timing of our research and development activities and initiatives; the mix of our products sold due to different profit margins among our products; timing of new product offerings, acquisitions, licenses or other significant events by us or our competitors; the ability of our suppliers to timely provide us with an adequate supply of products; the evolving product offerings of our competitors; regulatory approvals and legislative changes affecting the products we may offer or those of our competitors; increased labor and related costs; interruption in the manufacturing or distribution of our products; the effect of competing technological, industry and market developments; changes in our ability to obtain regulatory clearance or approval for our products; and our ability to expand the geographic reach of our sales and marketing efforts. Many of the products we may seek to develop and introduce in the future will require FDA approval or clearance before commercialization in the United States, and commercialization of such products outside of the United States would likely require additional regulatory approvals, CE Certificates of Conformity and import licenses. As a result, it will be difficult for us to forecast demand for these products with any degree of certainty. In addition, we will be increasing our operating expenses as we expand our commercial capabilities. Accordingly, we may experience significant, unanticipated quarterly losses. If our quarterly or annual operating results fall below the expectations of investors or securities analysts, the price of our common stock could decline substantially. Furthermore, any quarterly or annual fluctuations in our operating results may, in turn, cause the price of our common stock to fluctuate substantially. We believe that quarterly comparisons of our financial results are not necessarily meaningful and should not be relied upon as an indication of our future performance. Our future capital needs are uncertain and we may need to raise additional funds in the future, and these funds may not be available on acceptable terms or at all. As of December 31, 2015 , we had $112.8 million in cash and cash equivalents. We believe that our available cash on hand will be sufficient to satisfy our liquidity requirements for at least the next 12 months. However, the continued growth of our business, including the expansion of our sales force and marketing programs, and research and development activities, will significantly increase our expenses. In addition, we expect that the recent events involving Silimed, including our voluntary hold on the sale and implanting of all Sientra devices manufactured by Silimed between October 9, 2015 and March 1, 2016, our uncertainty regarding the amount of additional expenses we may incur in connection with regulatory inquiries and our own review and testing, as well as expenses we may incur in connection with reestablishing our inventory supply as a result of the fire in Silimed’s manufacturing facility and expenses we may incur defending against litigation claims, may have a material effect our future cash outflows and Sientra’s liquidity. Additionally, following our repayment of all principal, interest, other amounts and obligations owed to Oxford Finance LLC, or Oxford, under the term loans for a total of $24.5 million, the Company has no outstanding debt obligations. 30 Table of Contents Our future capital requirements will depend on many factors, including: · · · · · · · · · · · our continued ability to rely on Silimed to manufacture and supply our silicone gel breast implants, tissue expanders and other products or the timing and availability of alternative manufacturing sources ; net sales generated by our silicone gel breast implants and tissue expanders and any other future products that we may develop and commercialize; expenses we incur in connection with potential litigation or governmental investigations; costs associated with our own review and testing at Silimed’s manufacturing facilities and of our own inventory; costs associated with expanding our sales force and marketing programs; cost associated with developing and commercializing our proposed products or technologies; cost of obtaining and maintaining regulatory clearance or approval for our current or future products; cost of ongoing compliance with regulatory requirements; expenses we incur in connection with defending against the lawsuit filed against us and certain of our officers alleging violations of Sections 10(b) and 20(a) of the Exchange Act in connection with allegedly false and misleading statements concerning Sientra’s business, operations, and prospects; anticipated or unanticipated capital expenditures; and unanticipated general and administrative expenses. As a result of these and other factors, we do not know whether and the extent to which we may be required to raise additional capital. We may in the future seek additional capital from public or private offerings of our capital stock, borrowings under term loans or other sources. If we issue equity or debt securities to raise additional funds, our existing stockholders may experience dilution, and the new equity or debt securities may have rights, preferences and privileges senior to those of our existing stockholders. In addition, if we raise additional funds through collaborations, licensing, joint ventures, strategic alliances, partnership arrangements or other similar arrangements, it may be necessary to relinquish valuable rights to our potential future products or proprietary technologies, or grant licenses on terms that are not favorable to us. If we are unable to raise additional capital, we may not be able to expand our sales force and marketing programs, enhance our current products or develop new products, take advantage of future opportunities, or respond to competitive pressures, changes in supplier relationships, or unanticipated changes in customer demand. Any of these events could adversely affect our ability to achieve our strategic objectives, which could have a material adverse effect on our business, financial condition and operating results. Our ability to use net operating losses to offset future taxable income may be subject to certain limitations. As of December 31, 2015 , we had federal net operating loss carryforwards, or NOLs, of approximately $137.8 million, which expire in various years beginning in 2027, if not utilized to offset taxable income. In general, under Section 382 of the Internal Revenue Code of 1986, as amended, or the Code, a corporation that undergoes an “ownership change” is subject to limitations on its ability to utilize its pre-change NOLs to offset future taxable income. In general, an “ownership change” occurs if there is a cumulative change in our ownership by “5% shareholders” that exceeds 50 percentage points over a rolling three-year period. Our existing NOLs may be subject to limitations arising from previous ownership changes, and if we undergo one or more ownership changes in connection with future transactions in our stock, our ability to utilize NOLs could be further limited by Section 382 of the Code. As a result of these limitations, we may not be able to utilize a material portion of the NOLs reflected on our balance sheet and for this reason, we have fully reserved against the value of our NOLs on our balance sheet. We have not completed a Section 382 analysis to determine 31 Table of Contents if an ownership change has occurred. Until such analysis is completed, we cannot be sure that the full amount of the existing federal NOLs will be available to us, even if we do generate taxable income before their expiration. Future changes in financial accounting standards may cause adverse unexpected net sales or expense fluctuations and affect our reported results of operations. A change in accounting standards could have a significant effect on our reported results and may even affect our reporting of transactions completed before the change is effective. New pronouncements and varying interpretations of existing pronouncements have occurred and may occur in the future. Changes to existing rules or current practices may adversely affect our reported financial results of our business. Risks Related to Our Intellectual Property and Potential Litigation If our intellectual property rights do not adequately protect our products or technologies, others could compete against us more directly, which would hurt our profitability. Our success depends in part on our ability to protect our intellectual property rights. Our intellectual property portfolio consists of no patents or patent applications, and we do not currently plan to file for patent protection in the future, in the United States or elsewhere. We instead rely on trade secrets, proprietary know-how and regulatory barriers to protect our products and technologies and seek protection of our rights, in part, through confidentiality and proprietary information agreements. However, these agreements may not provide sufficient protection or adequate remedies for violation of our rights in the event of unauthorized use or disclosure of confidential and proprietary information. Without additional protection under the patent laws, such unauthorized use or disclosure may enable competitors to duplicate or surpass our technological achievements. Moreover, the laws of certain foreign countries do not recognize intellectual property rights or protect them to the same extent as do the laws of the United States. Failure to protect our proprietary rights could seriously impair our competitive position. The medical device industry is characterized by patent litigation and we could become subject to litigation that could be costly, result in the diversion of management’s time and efforts, require us to pay damages or prevent us from marketing our existing or future products. Our commercial success will depend in part on not infringing the patents or violating the other proprietary rights of others. Significant litigation regarding patent rights occurs in our industry. Our competitors in both the United States and abroad, many of which have substantially greater resources and have made substantial investments in patent portfolios and competing technologies, may have applied for or obtained or may in the future apply for and obtain, patents that will prevent, limit or otherwise interfere with our ability to make, use and sell our products. Generally, we do not conduct independent reviews of patents issued to third parties. We may not be aware of whether our products do or will infringe existing or future patents. In addition, patent applications in the United States and elsewhere can be pending for many years, and may be confidential for 18 months or more after filing, and because pending patent claims can be revised before issuance, there may be applications of others now pending of which we are unaware that may later result in issued patents that will prevent, limit or otherwise interfere with our ability to make, use or sell our products. We may not be aware of patents that have already issued that a third party might assert are infringed by our products. It is also possible that patents of which we are aware, but which we do not believe are relevant to our product candidates, could nevertheless be found to be infringed by our products. The large number of patents, the rapid rate of new patent applications and issuances, the complexities of the technology involved and the uncertainty of litigation increase the risk of business assets and management’s attention being diverted to patent litigation. In the future, we may receive communications from various industry participants alleging our infringement of their patents, trade secrets or other intellectual property rights and/or offering licenses to such intellectual property. Any lawsuits resulting from such allegations could subject us to significant liability for damages and invalidate our proprietary rights, even if they lack merit. Any potential intellectual property litigation also could force us to do one or more of the following: · · stop making, selling or using products or technologies that allegedly infringe the asserted intellectual property; lose the opportunity to license our technology to others or to collect royalty payments based upon successful protection and assertion of our intellectual property rights against others; 32 Table of Contents · · · · · incur significant legal expenses; pay substantial damages or royalties to the party whose intellectual property rights we may be found to be infringing; pay the attorney fees and costs of litigation to the party whose intellectual property rights we may be found to be infringing; redesign those products that contain the allegedly infringing intellectual property, which could be costly, disruptive and/or infeasible; or attempt to obtain a license to the relevant intellectual property from third parties, which may not be available on reasonable terms or at all. Any litigation or claim against us, even those without merit, may cause us to incur substantial costs, and could place a significant strain on our financial resources, divert the attention of management from our core business and harm our reputation. If we are found to infringe the intellectual property rights of third parties, we could be required to pay substantial damages (which may be increased up to three times of awarded damages) and/or substantial royalties and could be prevented from selling our products unless we obtain a license or are able to redesign our products to avoid infringement. Any such license may not be available on reasonable terms, if at all, and there can be no assurance that we would be able to redesign our products in a way that would not infringe the intellectual property rights of others. If we fail to obtain any required licenses or make any necessary changes to our products or technologies, we may have to withdraw existing products from the market or may be unable to commercialize one or more of our products, all of which could have a material adverse effect on our business, results of operations and financial condition. In addition, we generally indemnify our customers with respect to infringement by our products of the proprietary rights of third parties. Third parties may assert infringement claims against our customers. These claims may require us to initiate or defend protracted and costly litigation on behalf of our customers, regardless of the merits of these claims. If any of these claims succeed, we may be forced to pay damages on behalf of our customers or may be required to obtain licenses for the products they use. If we cannot obtain all necessary licenses on commercially reasonable terms, our customers may be forced to stop using our products. We may be subject to damages resulting from claims that we or our employees have wrongfully used or disclosed alleged trade secrets of our competitors or are in breach of non-competition or non-solicitation agreements with our competitors. Many of our employees were previously employed at other medical device companies, including our competitors or potential competitors, in some cases until recently. We have been the subject of and may, in the future, be subject to claims that we, our employees have inadvertently or otherwise used or disclosed alleged trade secrets or other proprietary information of these former employers or competitors. In addition, we have been and may in the future be subject to claims that we caused an employee to breach the terms of his or her non-competition or non-solicitation agreement. Litigation may be necessary to defend against these claims. Even if we are successful in defending against these claims, litigation could result in substantial costs and could be a distraction to management. If our defense to those claims fails, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel. Any litigation or the threat thereof may adversely affect our ability to hire employees. A loss of key personnel or their work product could hamper or prevent our ability to commercialize product candidates, which could have an adverse effect on our business, results of operations and financial condition. We may be subject to substantial warranty or product liability claims or other litigation in the ordinary course of business that may adversely affect our business, financial condition and operating results. As a supplier of medical devices, we may be subject to substantial warranty or product liability claims alleging that the use of our products has resulted in adverse health effects or other litigation in the ordinary course of business that may require us to make significant expenditures to defend these claims or pay damage awards. The breast implant industry has a particularly significant history of product liability litigation. The risks of litigation exist even with respect to products that have received or in the future may receive regulatory approval for commercial sale, such as our Breast Products. In addition, our silicone gel breast implants are sold with a warranty providing for no-charge replacement implants in the 33 Table of Contents event of certain ruptures that occur any time during the life of the patient and this warranty also includes cash payments to offset surgical fees if the rupture occurs within 10 years of implantation. We maintain product liability insurance, but this insurance is limited in amount and subject to significant deductibles. There is no guarantee that insurance will be available or adequate to protect against all claims. Our insurance policies are subject to annual renewal and we may not be able to obtain liability insurance in the future on acceptable terms or at all. In addition, our insurance premiums could be subject to increases in the future, which may be material. If the coverage limits are inadequate to cover our liabilities or our insurance costs continue to increase as a result of warranty or product liability claims or other litigation, then our business, financial condition and operating results may be adversely affected. Fluctuations in insurance cost and availability could adversely affect our profitability or our risk management profile. We hold a number of insurance policies, including product liability insurance, directors’ and officers’ liability insurance, general liability insurance, property insurance, employment practices, and workers’ compensation insurance. If the costs of maintaining adequate insurance coverage increase significantly in the future, our operating results could be materially adversely affected. Likewise, if any of our current insurance coverage should become unavailable to us or become economically impractical, we would be required to operate our business without indemnity from commercial insurance providers. If we operate our business without insurance, we could be responsible for paying claims or judgments against us that would have otherwise been covered by insurance, which could adversely affect our results of operations or financial condition. Risks Related to Our Legal and Regulatory Environment We are subject to extensive federal and state healthcare regulation, and if we fail to comply with applicable regulations, we could suffer severe criminal or civil sanctions or be required to restructure our operations, any of which could adversely affect our business, financial condition and operating results. As a device manufacturer, even though we do not control referrals or bill directly to Medicare, Medicaid or other third- party payors, we are subject to healthcare fraud and abuse regulation and enforcement by the federal government and the states in which we conduct our business, as well as other healthcare laws and regulations. The healthcare laws and regulations that may affect our ability to operate include: · · · · the federal Anti-Kickback Statute, which applies to our business activities, including our marketing practices, educational programs, pricing policies and relationships with healthcare providers, by prohibiting, among other things, knowingly and willfully soliciting, receiving, offering or providing any remuneration (including any bribe, kickback or rebate) directly or indirectly, overtly or covertly, in cash or in kind, intended to induce or in return for the purchase or recommendation of any good, facility, item or service reimbursable, in whole or in part, under a federal healthcare program, such as the Medicare or Medicaid programs. A person or entity does not need to have actual knowledge of the federal Anti-Kickback Statute or specific intent to violate it in order to commit a violation. In addition, following passage of the PPACA violations of the federal Anti-Kickback Statute became per se violations of the False Claims Act; federal civil and criminal false claims laws and civil monetary penalty laws, including the federal civil False Claims Act, or FCA, that prohibit, among other things, knowingly presenting, or causing to be presented, claims for payment from Medicare, Medicaid or other government payors that are false or fraudulent, or making a false statement material to an obligation to pay or transmit money or property to the federal government, and which may apply to entities that provide coding and billing advice to customers; the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, and its implementing regulations, which created additional federal criminal laws that prohibit, among other things, knowingly and willfully executing, or attempting to execute a scheme to defraud any healthcare benefit program or making false statements relating to healthcare matters ; and, HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or the HITECH Act, also imposes certain regulatory and contractual requirements on certain types of people and entities regarding the privacy, security and transmission of individually identifiable health information; 34 Table of Contents · · the federal Physician Payments Sunshine Act, enacted under the PPACA, which requires certain manufacturers of drugs, devices, biologics, and medical supplies for which payment is available under Medicare, Medicaid, or the Children’s Health Insurance Program, with specific exceptions, to make annual reports to the Centers for Medicare & Medicaid Services, or CMS, regarding any “transfers of value” provided to physicians and teaching hospitals. Failure to submit required information may result in civil monetary penalties of up to an aggregate of $150,000 per year and up to an aggregate of $1 million per year for “knowing failures,” for all payments, transfers of value or ownership or investment interests that are not timely, accurately, and completely reported in an annual submission. We are required to report detailed payment data and submit legal attestation to the accuracy of such data by March 31st of each calendar year; and state law equivalents of each of the above federal laws, such as anti-kickback and false claims laws that may apply to items or services reimbursed by any third-party payor, including commercial insurers; state laws that require device companies to comply with the industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government or otherwise restrict payments that may be provided to healthcare providers and entities; state laws that require device manufacturers to report information related to payments and other transfers of value to physicians and other healthcare providers and entities or marketing expenditures; and state laws governing the privacy and security of certain health information, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts. Because of the breadth of these laws, it is possible that some of our business activities, including our relationships with physicians and other health care providers and entities, some of whom recommend, purchase and/or prescribe our products, could be subject to challenge under one or more of such laws. Any action against us for violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business. If our operations are found to be in violation of any of the laws described above or any other governmental regulations that apply to us, we may be subject to penalties, including, without limitation, administrative, civil and/or criminal penalties, damages, fines, disgorgement, contractual damages, reputational harm, exclusion from governmental health care programs, diminished profits and future earnings, and the curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our financial results. Our medical device products and operations are subject to extensive governmental regulation both in the United States and abroad, and our failure to comply with applicable requirements could cause our business to suffer. Our medical device products and operations are subject to extensive regulation by the FDA and various other federal, state and foreign governmental authorities, such as Health Canada. Government regulation of medical devices is meant to assure their safety and effectiveness, and includes regulation of, among other things: · · · · design, development and manufacturing; testing, labeling, content and language of instructions for use and storage; clinical trials; product safety; · marketing, sales and distribution; · · · · regulatory clearances and approvals including pre-market clearance and approval; conformity assessment procedures; product traceability and record keeping procedures; advertising and promotion; 35 Table of Contents · · · · product complaints, complaint reporting, recalls and field safety corrective actions; post-market surveillance, including reporting of deaths or serious injuries and malfunctions that, if they were to recur, could lead to death or serious injury; post-market studies; and product import and export. The regulations to which we are subject are complex and have tended to become more stringent over time. Regulatory changes could result in restrictions on our ability to carry on or expand our operations, higher than anticipated costs or lower than anticipated sales. Before we can market or sell a new regulated product or a significant modification to an existing product in the United States, we must obtain either clearance under Section 510(k) of the Federal Food, Drug and Cosmetic Act, or FDCA, or an approval of a pre-market approval, or PMA, application unless the device is specifically exempt from pre-market review. In the 510(k) clearance process, the FDA must determine that a proposed device is “substantially equivalent” to a device legally on the market, known as a “predicate” device, with respect to intended use, technology and safety and effectiveness, in order to clear the proposed device for marketing. Clinical data is sometimes required to support substantial equivalence. In the PMA approval process, the FDA must determine that a proposed device is safe and effective for its intended use based, in part, on extensive data, including, but not limited to, technical, pre-clinical, clinical trial, manufacturing and labeling data. The PMA process is typically required for devices for which the 510(k) process cannot be used and that are deemed to pose the greatest risk, such as life- sustaining, life-supporting or implantable devices. Modifications to products that are approved through a PMA application generally need FDA approval. Similarly, some modifications made to products cleared through a 510(k) may require a new 510(k). The FDA’s 510(k) clearance process usually takes from three to 12 months, but may last longer. The process of obtaining a PMA is much more costly and uncertain than the 510(k) clearance process and generally takes from one to three years, or even longer, from the time the application is submitted to the FDA until an approval is obtained. In the United States, our silicone gel breast implants are marketed pursuant to a PMA order issued by the FDA in March 2012, and our tissue expanders are marketed pursuant to pre-market clearance under Section 510(k) of the FDCA. If the FDA requires us to go through a lengthier, more rigorous examination for future products or modifications to existing products than we had expected, our product introductions or modifications could be delayed or canceled, which could cause our sales to decline. The FDA may demand that we obtain a PMA prior to marketing certain of our future products. In addition, if the FDA disagrees with our determination that a product we market is subject to an exemption from pre-market review, the FDA may require us to submit a 510(k) or PMA in order to continue marketing the product. Further, even with respect to those future products where a PMA is not required, we cannot assure you that we will be able to obtain the 510(k) clearances with respect to those products. The FDA can delay, limit or deny clearance or approval of a device for many reasons, including: · we may not be able to demonstrate to the FDA’s satisfaction that our products are safe and effective for their intended uses; · · the data from our pre-clinical studies and clinical trials may be insufficient to support clearance or approval, where required; and the manufacturing process or facilities we use may not meet applicable requirements. In addition, the FDA may change its clearance and approval policies, adopt additional regulations or revise existing regulations, or take other actions that may prevent or delay approval or clearance of our products under development or impact our ability to modify our currently approved or cleared products on a timely basis. Any change in the laws or regulations that govern the clearance and approval processes relating to our current and future products could make it more difficult and costly to obtain clearance or approval for new products, or to produce, market and distribute existing products. 36 Table of Contents The FDA could also reclassify some or all of our products that are currently classified as Class II to Class III requiring additional controls, clinical studies and submission of a PMA for us to continue marketing and selling those products. We cannot guarantee that the FDA will not reclassify any of our Class II devices into Class III and require us to submit a PMA for FDA review and approval of the safety and effectiveness of our product. Any delay in, or failure to receive or maintain, clearance or approval for our products under development could prevent us from generating sales from these products or achieving profitability. Additionally, the FDA and other regulatory authorities have broad enforcement powers. Regulatory enforcement or inquiries, or other increased scrutiny on us, could dissuade some surgeons from using our products and adversely affect our reputation and the perceived safety and efficacy of our products. In addition, even after we have obtained the proper regulatory clearance or approval to market a product, the FDA has the power to require us to conduct post marketing studies. For example, we are required to continue to study and report clinical results to the FDA on our silicone gel breast implants. Failure to conduct this or other required studies in a timely manner could result in the revocation of the PMA approval or 510(k) clearance for the product that is subject to such a requirement and could also result in the recall or withdrawal of the product, which would prevent us from generating sales from that product in the United States. Failure to comply with applicable laws and regulations could jeopardize our ability to sell our products and result in enforcement actions such as: · warning letters; · · · · · · · · fines; injunctions; civil penalties; termination of distribution; recalls or seizures of products; delays in the introduction of products into the market; total or partial suspension of production; refusal of the FDA or other regulator to grant future clearances or approvals; · withdrawals or suspensions of current clearances or approvals, resulting in prohibitions on sales of our products; and/or · in the most serious cases, criminal penalties. Any of these sanctions could result in higher than anticipated costs or lower than anticipated sales and have a material adverse effect on our reputation, business, results of operations and financial condition. If we or our third-party manufacturer fail to comply with the FDA’s good manufacturing practice regulations, it could impair our ability to market our products in a cost-effective and timely manner. We and our third-party manufacturer are required to comply with the FDA’s Quality System Regulation, or QSR, which covers the methods and documentation of the design, testing, production, control, quality assurance, labeling, packaging, sterilization, storage and shipping of our products. The FDA audits compliance with the QSR through periodic announced and unannounced inspections of manufacturing and other facilities. The FDA may conduct inspections or audits at any time. If we or our manufacturer fail to adhere to QSR requirements, have significant non-compliance issues or fail to timely and adequately respond to any adverse inspectional observations or product safety issues, or if any 37 Table of Contents corrective action plan that we or our manufacturer propose in response to observed deficiencies is not sufficient, the FDA could take enforcement action against us, which could delay production of our products and may include: · · · · · untitled letters, warning letters, fines, injunctions, consent decrees and civil penalties; unanticipated expenditures to address or defend such actions; customer notifications or repair, replacement, refunds, recall, detention or seizure of our products; operating restrictions or partial suspension or total shutdown of production; refusing or delaying our requests for 510(k) clearance or premarket approval of new products or modified products; · withdrawing 510(k) clearances or pre-market approvals that have already been granted; · · refusal to grant export approval for our products; or criminal prosecution. Any of the foregoing actions could have a material adverse effect on our reputation, business, financial condition and operating results. Furthermore, our manufacturer may not currently be or may not continue to be in compliance with all applicable regulatory requirements, which could result in our failure to produce our products on a timely basis and in the required quantities, if at all. There is no guarantee that the FDA will grant 510(k) clearance or PMA approval of our future products, and failure to obtain necessary clearances or approvals for our future products would adversely affect our ability to grow our business. Some of our future products may require FDA clearance of a 510(k) or FDA approval of a PMA. The FDA may not approve or clear these products for the indications that are necessary or desirable for successful commercialization. Indeed, the FDA may refuse our requests for 510(k) clearance or pre-market approval of new products. Significant delays in receiving clearance or approval, or the failure to receive clearance or approval for our new products would have an adverse effect on our ability to expand our business. If we modify our FDA approved or cleared devices, we may need to seek additional clearances or approvals, which, if not granted, would prevent us from selling our modified products. In the United States, our silicone gel breast implants are marketed pursuant to a PMA order issued by the FDA in March 2012, and our tissue expanders are marketed pursuant to pre-market clearance under Section 510(k) of the FDCA. Any modifications to a PMA-approved or 510(k)-cleared device that could significantly affect its safety or effectiveness, including significant design and manufacturing changes, or that would constitute a major change in its intended use, manufacture, design, components, or technology requires a new 510(k) clearance or, possibly, approval of a new PMA application or PMA supplement. However, certain changes to a PMA-approved device do not require submission and approval of a new PMA or PMA supplement and may only require notice to FDA in a PMA 30-Day Notice, Special PMA Supplement – Changes Being Effected or PMA Annual Report. The FDA requires every manufacturer to make this determination in the first instance, but the FDA may review any manufacturer’s decision. The FDA may not agree with our decisions regarding whether new clearances or approvals are necessary. We have modified some of our 510(k) cleared products, and have determined based on our review of the applicable FDA guidance that in certain instances the changes did not require new 510(k) clearances or PMA approvals. If the FDA disagrees with our determination and requires us to seek new 510(k) clearances or PMA approvals for modifications to our previously cleared or approved products for which we have concluded that new clearances or approvals are unnecessary, we may be required to cease marketing or to recall the modified product until we obtain clearance or approval, and we may be subject to significant regulatory fines or penalties. Furthermore, our products could be subject to recall if the FDA determines, for any reason, that our products are not safe or effective or that appropriate regulatory submissions were not made. Delays in receipt or failure to receive 38 Table of Contents approvals, the loss of previously received approvals, or the failure to comply with any other existing or future regulatory requirements, could reduce our sales, profitability and future growth prospects. A recall of our products, either voluntarily or at the direction of the FDA or another governmental authority, or the discovery of serious safety issues with our products that leads to corrective actions, could have a significant adverse impact on us. The FDA and similar foreign governmental authorities have the authority to require the recall of commercialized products in the event of material deficiencies or defects in design or manufacture of a product or in the event that a product poses an unacceptable risk to health. The FDA’s authority to require a recall must be based on an FDA finding that there is reasonable probability that the device would cause serious injury or death. Manufacturers may also, under their own initiative, recall a product if any material deficiency in a device is found or withdraw a product to improve device performance or for other reasons. The FDA requires that certain classifications of recalls be reported to the FDA within 10 working days after the recall is initiated . A government-mandated or voluntary recall by us or one of our distributors could occur as a result of an unacceptable risk to health, component failures, malfunctions, manufacturing errors, design or labeling defects or other deficiencies and issues. Similar regulatory agencies in other countries have similar authority to recall devices because of material deficiencies or defects in design or manufacture that could endanger health. Any recall would divert management attention and financial resources and could cause the price of our stock to decline, expose us to product liability or other claims and harm our reputation with customers. Such events could impair our ability to produce our products in a cost-effective and timely manner in order to meet our customers’ demands. A recall involving our silicone gel breast implants could be particularly harmful to our business, financial and operating results. Companies are required to maintain certain records of recalls, even if they are not reportable to the FDA or similar foreign governmental authorities. We may initiate voluntary recalls involving our products in the future that we determine do not require notification of the FDA or foreign governmental authorities. If the FDA or foreign governmental authorities disagree with our determinations, they could require us to report those actions as recalls. A future recall announcement could harm our reputation with customers and negatively affect our sales. In addition, the FDA or a foreign governmental authority could take enforcement action for failing to report the recalls when they were conducted. In addition, under the FDA’s medical device reporting regulations, we are required to report to the FDA any incident in which our product may have caused or contributed to a death or serious injury or in which our product malfunctioned and, if the malfunction were to recur, would likely cause or contribute to death or serious injury. Repeated product malfunctions may result in a voluntary or involuntary product recall. We are also required to follow detailed recordkeeping requirements for all firm- initiated medical device corrections and removals, and to report such corrective and removal actions to FDA if they are carried out in response to a risk to health and have not otherwise been reported under the medical device reporting regulations. Depending on the corrective action we take to redress a product’s deficiencies or defects, the FDA may require, or we may decide, that we will need to obtain new approvals or clearances for the device before we may market or distribute the corrected device. Seeking such approvals or clearances may delay our ability to replace the recalled devices in a timely manner. Moreover, if we do not adequately address problems associated with our devices, we may face additional regulatory enforcement action, including FDA warning letters, product seizure, injunctions, administrative penalties, or civil or criminal fines. We may also be required to bear other costs or take other actions that may have a negative impact on our sales as well as face significant adverse publicity or regulatory consequences, which could harm our business, including our ability to market our products in the future. Any adverse event involving our products, whether in the United States or abroad, could result in future voluntary corrective actions, such as recalls or customer notifications, or agency action, such as inspection, mandatory recall or other enforcement action. Any corrective action, whether voluntary or involuntary, as well as defending ourselves in a lawsuit, will require the dedication of our time and capital, distract management from operating our business and may harm our reputation and financial results. If the third parties on which we rely to conduct our clinical trials and to assist us with pre-clinical development do not perform as contractually required or expected, we may not be able to obtain regulatory clearance or approval for or commercialize our products. We often must rely on third parties, such as contract research organizations, medical institutions, clinical investigators and contract laboratories to conduct our clinical trials and prepare our regulatory submissions. If these third parties do not successfully carry out their contractual duties or regulatory obligations or meet expected deadlines, if these third parties need to be replaced, or if the quality or accuracy of the data they obtain is compromised due to the failure to 39 Table of Contents adhere to our clinical protocols or regulatory requirements or for other reasons, our pre-clinical development activities or clinical trials may be extended, delayed, suspended or terminated, and we may not be able to obtain regulatory clearance or approval for, or successfully commercialize, our products on a timely basis, if at all, and our business, operating results and prospects may be adversely affected. Furthermore, our third-party clinical trial investigators may be delayed in conducting our clinical trials for reasons outside of their control. We may be subject to regulatory or enforcement actions if we engage in improper marketing or promotion of our products. Our educational and promotional activities and training methods must comply with FDA and other applicable laws, including the prohibition of the promotion of a medical device for a use that has not been cleared or approved by the FDA. Use of a device outside of its cleared or approved indications is known as “off-label” use. Physicians may use our products off-label in their professional medical judgment, as the FDA does not restrict or regulate a physician’s choice of treatment within the practice of medicine. However, if the FDA determines that our educational and promotional activities or training constitutes promotion of an off-label use, it could request that we modify our training or promotional materials or subject us to regulatory or enforcement actions, including the issuance of warning letters, untitled letters, fines, penalties, injunctions, or seizures, which could have an adverse impact on our reputation and financial results. It is also possible that other federal, state or foreign enforcement authorities might take action if they consider our educational and promotional activities or training methods to constitute promotion of an off-label use, which could result in significant fines or penalties under other statutory authorities, such as laws prohibiting false claims for reimbursement. In that event, our reputation could be damaged and adoption of the products could be impaired. Although our policy is to refrain from statements that could be considered off-label promotion of our products, the FDA or another regulatory agency could disagree and conclude that we have engaged in off-label promotion. It is also possible that other federal, state or foreign enforcement authorities might take action if they consider our business activities constitute promotion of an off-label use, which could result in significant penalties, including, but not limited to, criminal, civil and/or administrative penalties, damages, fines, disgorgement, exclusion from participation in government healthcare programs, and the curtailment or restructuring of our operations. In addition, the off-label use of our products may increase the risk of product liability claims. Product liability claims are expensive to defend and could divert our management’s attention, result in substantial damage awards against us, and harm our reputation. Changes in existing third-party coverage and reimbursement may impact our ability to sell our products when used in breast reconstruction procedures. Maintaining and growing sales of our products when used in breast reconstruction procedures depends, in part, on the availability of coverage and adequate reimbursement from third-party payors, including government programs such as Medicare and Medicaid, private insurance plans and managed care programs. Breast augmentation procedures are generally performed on a cash ‑pay basis and are not covered by third ‑party payors. In contrast, breast reconstruction procedures may be covered by third ‑party payors. Therefore, h ospitals and other healthcare provider customers that purchase our products to use in breast reconstruction procedures typically bill various third-party payors to cover all or a portion of the costs and fees associated with the procedures in which our products are used, including the cost of the purchase of our products. Decreases in the amount third- party payors are willing to reimburse our customers for breast reconstruction procedures using our products could create pricing pressures for us. T he process for determining whether a third-party payor will provide coverage for a product or procedure may be separate from the process for establishing the reimbursement rate that such a payor will pay for the product or procedure . A payor’s decision to provide coverage for a product or procedure does not imply that an adequate reimbursement rate will be approved. Further, one payor’s determination to provide coverage for a product or procedure does not assure that other payors will also provide such coverage. Adequate third-party reimbursement may not be available to enable us to maintain our business in a profitable way . We may be unable to sell our products on a profitable basis if third-party payors deny coverage or reduce their current levels of payment, or if our costs of production increase faster than increases in reimbursement levels. Furthermore, the healthcare industry in the United States has experienced a trend toward cost containment as government and private insurers seek to control healthcare costs by imposing lower payment rates and negotiating reduced contract rates with service providers. Therefore, we cannot be certain that the breast reconstruction procedures using our products will be reimbursed at a cost-effective level. Nor can we be certain that third-party payors using a methodology that sets amounts based on the type of procedure performed, such as those utilized by government programs and in many privately managed care systems, will view the cost of our products to be justified so as to incorporate such costs into the 40 Table of Contents overall cost of the procedure. Moreover, we are unable to predict what changes will be made to the reimbursement methodologies used by third-party payors in the future. To the extent we sell our products internationally, market acceptance may depend, in part, upon the availability of coverage and reimbursement within prevailing healthcare payment systems. Reimbursement and healthcare payment systems in international markets vary significantly by country, and include both government-sponsored healthcare and private insurance. We may not obtain international coverage and reimbursement approvals in a timely manner, if at all. Our failure to receive such approvals would negatively impact market acceptance of our products in the international markets in which those approvals are sought. Legislative or regulatory health care reforms may make it more difficult and costly to produce, market and distribute our products after clearance or approval is obtained, or to do so profitably. Recent political, economic and regulatory influences are subjecting the health care industry to fundamental changes. Both the federal and state governments in the United States and foreign governments continue to propose and pass new legislation and regulations designed to contain or reduce the cost of health care, improve quality of care, and expand access to healthcare, among other purposes. Such legislation and regulations may result in decreased reimbursement for medical devices and/or the procedures in which they are used, which may further exacerbate industry-wide pressure to reduce the prices charged for medical devices. This could harm our ability to market and generate sales from our products. In addition, FDA regulations and guidance are often revised or reinterpreted by the FDA in ways that may significantly affect our business and our products. Any new regulations or revisions or reinterpretations of existing regulations may impose additional costs or lengthen review times of our products. Federal and state governments in the United States have recently enacted legislation to overhaul the nation’s health care system. For example, in March 2010, the PPACA was signed into law. While one goal of health care reform is to expand coverage to more individuals, it also involves increased government price controls, additional regulatory mandates and other measures designed to constrain medical costs. The PPACA substantially changes the way healthcare is financed by both governmental and private insurers, encourages improvements in the quality of healthcare items and services and significantly impacts the medical device industry. Among other ways in which the PPACA significantly impacts our industry, the PPACA: · · · · · imposes an annual excise tax of 2.3% on any entity that manufactures or imports medical devices offered for sale in the United States, with limited exceptions; expands eligibility criteria for Medicaid programs; establishes a new Patient-Centered Outcomes Research Institute to oversee and identify priorities in comparative clinical effectiveness research in an effort to coordinate and develop such research; implements payment system reforms including a national pilot program on payment bundling to encourage hospitals, physicians and other providers to improve the coordination, quality and efficiency of certain health care services through bundled payment models; and creates an independent payment advisory board that will submit recommendations to Congress to reduce Medicare spending if projected Medicare spending exceeds a specified growth rate. The medical device excise tax has been suspended by the CAA, with respect to medical device sales during calendar years 2016 and 2017. Absent further Congressional action, this excise tax will be reinstated for medical device sales beginning January 1, 2018. The CAA also temporarily delays implementation of other taxes intended to help fund PPACA programs. We are unsure of the full impact that the PPACA will have on our business. There have been judicial and Congressional challenges to certain aspects of the PPACA, and we expect there will be additional challenges and amendments in the future. In addition, other legislative changes have been proposed and adopted since the PPACA was enacted. For example, on August 2, 2011, the President signed into law the Budget Control Act of 2011, which, among other things, 41 Table of Contents created the Joint Select Committee on Deficit Reduction to recommend to Congress proposals in spending reductions. The Joint Select Committee did not achieve a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, triggering the legislation’s automatic reduction to several government programs. This includes reductions to Medicare payments to providers of 2% per fiscal year, which went into effect on April 1, 2013 , following passage of the Bipartisan Budget Act of 2015, and will stay in effect through 202 5 unless additional Congressional action is taken. Additionally, on January 2, 2013, President Obama signed into law the A TRA, which, among other things, reduced Medicare payments to several providers, including hospitals, imaging centers and cancer treatment centers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. In the future there may continue to be additional proposals relating to the reform of the U.S. healthcare system. Certain of these proposals could limit the prices we are able to charge for our products, or the amount of reimbursement available for our products, and could limit the acceptance and availability of our products, any of which could have a material adverse effect on our business, results of operations and financial condition. If we fail to obtain and maintain regulatory approval in Canada, our market opportunities will be limited. In order to market our products in Canada, we must obtain and maintain separate regulatory approvals and comply with numerous and varying regulatory requirements. We are currently not able to obtain Health Canada’s approval to market our breast implant products in Canada due to the suspension of Silimed’s ISO 13485 certificate. Even if Silimed’s ISO certification is reinstated, the time required to obtain regulatory approval in Canada may be longer than the time required to obtain FDA pre- market approval and Health Canada may want additional information prior to approval as well . The Canadian regulatory approval process includes many of the risks associated with obtaining FDA approval and we may not obtain Canadian regulatory approval on a timely basis, if at all. FDA approval does not ensure approval by regulatory authorities in other countries, including Canada, and approval by one foreign regulatory authority does not ensure approval by regulatory authorities in other foreign countries. However, the failure to obtain clearance or approval in one jurisdiction may have a negative impact on our ability to obtain clearance or approval elsewhere. If we do not obtain or maintain necessary approvals to commercialize our products in Canada, it would negatively affect our overall market penetration. Our customers and much of our industry are required to be compliant under the federal Health Insurance Portability and Accountability Act of 1996, the Health Information Technology for Economic and Clinical Health Act and implementing regulations (including the final Omnibus Rule published on January 25, 2013) affecting the transmission, security and privacy of health information, and failure to comply could result in significant penalties. Numerous federal and state laws and regulations, including HIPAA, and the Health Information Technology for Economic and Clinical Health Act, or the HITECH Act, govern the collection, dissemination, security, use and confidentiality of health information that identifies specific patients. HIPAA and the HITECH Act require our surgeon and hospital customers to comply with certain standards for the use and disclosure of health information within their companies and with third parties. The Privacy Standards and Security Standards under HIPAA establish a set of standards for the protection of individually identifiable health information by health plans, health care clearinghouses and certain health care providers, referred to as Covered Entities, and the Business Associates with whom Covered Entities enter into service relationships pursuant to which individually identifiable health information may be exchanged. Notably, whereas HIPAA previously directly regulated only these Covered Entities, the HITECH Act, which was signed into law as part of the stimulus package in February 2009, makes certain of HIPAA’s privacy and security standards also directly applicable to Covered Entities’ Business Associates. As a result, both Covered Entities and Business Associates are now subject to significant civil and criminal penalties for failure to comply with Privacy Standards and Security Standards. HIPAA requires Covered Entities (like our customers) and Business Associates to develop and maintain policies and procedures with respect to protected health information that is used or disclosed, including the adoption of administrative, physical and technical safeguards to protect such information. The HITECH Act expands the notification requirement for breaches of patient-identifiable health information, restricts certain disclosures and sales of patient-identifiable health information and provides for civil monetary penalties for HIPAA violations. The HITECH Act also increased the civil and criminal penalties that may be imposed against Covered Entities and Business Associates and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorney fees and costs associated with pursuing federal civil actions. Additionally, certain states have adopted comparable privacy and security laws and regulations, some of which may be more stringent than HIPAA. 42 Table of Contents We are not currently required to comply with HIPAA or HITECH because we are neither a Covered Entity nor a Business Associate (as that term is defined by HIPAA). However, in administering our warranties and complying with FDA - required device tracking, we do regularly handle confidential and personal information similar to that which these laws seek to protect. We also occasionally encounter hospital customers who pressure us to sign Business Associate Agreements, or BAAs, although, to date, we have refused, given that we do not believe we are business associates to such Covered Entities under HIPAA or HITECH. If the law or regulations were to change or if we were to agree to sign a BAA, the costs of complying with the HIPAA standards are burdensome and could have a material adverse effect on our business. In addition, under such situations there would be significant risks and financial penalties for us if we were then found to have violated the laws and regulations that pertain to Covered Entities and Business Associates. We are unable to predict what changes to the HIPAA Privacy Standards and Security Standards might be made in the future or how those changes could affect our business. Any new legislation or regulation in the area of privacy and security of personal information, including personal health information, could also adversely affect our business operations. If we do not comply with existing or new applicable federal or state laws and regulations related to patient health information, we could be subject to criminal or civil sanctions and any resulting liability could adversely affect our financial condition. An adverse outcome of a sales and use tax audit could have a material adverse effect on our results of operations and financial condition. We sell our products in all 50 states and each state (and some local governments) has its own sales tax laws and regulations. We charge each of our customers sales tax on each order and report and pay that tax to the appropriate state authority, unless we believe there is an applicable exception. In some states, there are no available exceptions; in some states, we believe our products can be sold tax free. In other states, we believe we can sell our products tax free only for customers who request tax-exempt treatment due to the nature of the devices we sell or due to the nature of the customer’s use of our device. We may be audited by the taxing authorities of one or more states and there can be no assurance, however, that an audit will be resolved in our favor. Such an audit could be expensive and time-consuming and result in substantial management distraction. If the matter were to be resolved in a manner adverse to us, it could have a material adverse effect on our results of operations and financial condition. Risks Related to Our Common Stock Our stock price may be volatile, and you may not be able to resell shares of our common stock at or above the price you paid. The market price of our common stock is likely to be highly volatile and could be subject to wide fluctuations in response to various factors, some of which are beyond our control. For example, our common stock price declined from $20.58 to $2.78 from September 23, 2015 to November 17, 2015 as a result of the recent events concerning Silimed. These factors include those discussed in this “Risk Factors” section of this Form 10- K and others such as: · · · · · · · a determination that our Silimed-manufactured products are not in compliance with regulatory requirements, or its facilities are not maintained in compliance with regulatory requirements; a slowdown in the medical device industry, the aesthetics industry or the general economy; actual or anticipated quarterly or annual variations in our results of operations or those of our competitors; changes in accounting principles or changes in interpretations of existing principles, which could affect our financial results; actual or anticipated changes in our growth rate relative to our competitors; changes in earnings estimates or recommendations by securities analysts; fluctuations in the values of companies perceived by investors to be comparable to us; 43 Table of Contents · · · · · · · · · announcements by us or our competitors of new products or services, significant contracts, commercial relationships, capital commitments or acquisitions; competition from existing technologies and products or new technologies and products that may emerge; the entry into, modification or termination of agreements with our sales representatives or distributors; developments with respect to intellectual property rights; sales, or the anticipation of sales, of our common stock by us, our insiders or our other stockholders, including upon the expiration of contractual lock-up agreements; our ability to develop and market new and enhanced products on a timely basis; our commencement of, or involvement in, litigation; additions or departures of key management or technical personnel; and changes in laws or governmental regulations applicable to us. In recent years, the stock markets generally have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of those companies. Broad market and industry factors may significantly affect the market price of our common stock, regardless of our actual operating performance. We and certain of our executive officers and directors have been named as defendants in recently initiated securities class action lawsuit that could result in substantial costs and divert management’s attention. On September 25, 2015, a lawsuit styled as a class action of our stockholders was filed in the United States District Court for the Central District of California. The lawsuit names us and certain of our officers as defendants and alleges violations of Sections 10(b) and 20(a) of the Exchange Act in connection with allegedly false and misleading statements concerning our business, operations, and prospects. On October 28, November 5, and November 19, 2015, three lawsuits styled as class actions of our stockholders were filed in the Superior Court of California for the County of San Mateo. The lawsuits name us , certain of our officers and directors, and the underwriters associated with our follow-on public offering that closed on September 23, 2015 as defendants and alleges violations of Sections 11, 12(a)(2), and 15 of the Securities Act in connection with allegedly false and misleading statements in our offering documents associated with the follow-on offering concerning our business, operations, and prospects. We intend to engage in a vigorous defense of such litigation. If we are not successful in our defense of such litigation, we could be forced to make significant payments to or other settlements with our stockholders and their lawyers, and such payments or settlement arrangements could have a material adverse effect on our business, operating results or financial condition. Even if these claims are not successful, the litigation could result in substantial costs and significant adverse impact on our reputation and divert management’s attention and resources, which could have a material adverse effect on our business, operating results or financial condition. We do not anticipate paying any cash dividends in the foreseeable future, and accordingly, stockholders must rely on stock appreciation for any return on their investment. We do not anticipate declaring any cash dividends to holders of our common stock in the foreseeable future. As a result, capital appreciation, if any, of our common stock will be your sole source of gain for the foreseeable future. Our executive officers, directors and principal stockholders own a significant percentage of our stock and will be able to exert significant control over matters subject to stockholder approval. As of March 7, 2016, our executive officers, directors and principal stockholders beneficially owned approximately 50.7% of our outstanding voting stock. As a result, these stockholders have the ability to influence us through their ownership position and may be able to determine all matters requiring stockholder approval. For example, these stockholders may be able to control elections of directors, amendments of our organizational documents, or approval 44 Table of Contents of any merger, sale of assets, or other major corporate transaction. This may prevent or discourage unsolicited acquisition proposals or offers for our common stock that you may feel are in your best interest as one of our stockholders. We are an “emerging growth company” and intend to take advantage of reduced disclosure requirements applicable to emerging growth companies, which could make our common stock less attractive to investors. We are an “emerging growth company,” as defined in the JOBS Act, and we intend to take advantage of certain exemptions from various reporting requirements that apply to other public companies that are not “emerging growth companies.” As an emerging growth company: · we are exempt from the requirement to obtain an attestation and report from our auditors on the assessment of our internal control over financial reporting pursuant to the Sarbanes-Oxley Act of 2002, or the Sarbanes-Oxley Act; · we are permitted to provide less extensive disclosure about our executive compensation arrangements in our periodic reports, proxy statements and registration statements; and · we are not required to give our stockholders non-binding advisory votes on executive compensation or golden parachute arrangements. In addition, the JOBS Act provides that an emerging growth company may take advantage of an extended transition period for complying with new or revised accounting standards. We have irrevocably elected not to avail ourselves of this exemption and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies. We may remain an emerging growth company until December 31, 2019 (the last day of the fiscal year following the fifth anniversary of our initial public offering). However, if certain events occur prior to the end of such five-year period, including if we become a “large accelerated filer,” our annual gross revenue equals or exceeds $1.0 billion or we issue more than $1.0 billion of non-convertible debt in any three-year period, we will cease to be an emerging growth company prior to the end of such five- year period. We have incurred increased costs as a result of operating as a public company and our management is required to devote substantial time to new compliance initiatives and corporate governance practices. As a public company, and increasingly after we are no longer an “emerging growth company,” we will incur significant legal, accounting and other expenses that we did not incur as a private company. In addition, the Sarbanes-Oxley Act and rules subsequently implemented by the SEC and NASDAQ impose numerous requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance practices. Also, the Exchange Act requires, among other things, that we file annual, quarterly and current reports with respect to our business and operating results. Our management and other personnel will need to devote a substantial amount of time to compliance with these laws and regulations. These requirements have increased and will continue to increase our legal, accounting and financial compliance costs and have made and will continue to make some activities more time consuming and costly. For example, we expect these rules and regulations to make it more difficult and more expensive for us to obtain director and officer liability insurance, and we may be required to incur substantial costs to maintain the same or similar coverage. These rules and regulations could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors or our board committees or as executive officers. Overall, our incremental costs resulting from operating as a public company, including compliance with these rules and regulations, was approximately $3.2 million for the year ended December 31, 2015 . However, these rules and regulations are often subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. 45 Table of Contents As a public company, we are required to assess our internal control over financial reporting on an annual basis, and any future adverse results from such assessment could result in a loss of investor confidence in our financial reports and have an adverse effect on our stock price. As a public company, we are required to comply with certain of the requirements of Section 404 of the Sarbanes-Oxley Act of 2002, as amended, regarding internal control over financial reporting. However, for as long as we remain an “emerging growth company” as defined in the JOBS Act, we intend to utilize the provision exempting us from the requirement that our independent registered public accounting firm provide an attestation on the effectiveness of our internal control over financial reporting Prior to becoming a public company, we were not required to comply with the requirements of Section 404 but previously we had identified two material weaknesses in our internal control over financial reporting for certain financial statement periods included in this report. A “material weakness” is a deficiency, or a combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis. The identified material weaknesses related to our not having properly designed controls in place to account for complex debt and equity transactions, including preferred stock and warrants associated with debt issuances, and to record bonus accrual and related expense in the appropriate period. While we believe we have remediated these previously reported material weaknesses, we cannot assure you that we will not be required to take further remedial action with respect to those material weaknesses or that there will not be material weaknesses or significant deficiencies in our internal controls in the future. The process of becoming fully compliant with Section 404 may divert internal resources and will take a significant amount of time and effort to complete, and may result in additional deficiencies and material weaknesses being identified by us or our independent registered public accounting firm. We may experience higher than anticipated operating expenses, as well as increased independent registered public accounting firm fees during the implementation of any required changes and thereafter. Completing documentation of our internal control system and financial processes, remediation of control deficiencies and management testing of internal controls will require substantial effort by us. If our internal control over financial reporting or our related disclosure controls and procedures are not effective, we may not be able to accurately report our financial results or file our periodic reports in a timely manner, which may cause investors to lose confidence in our reported financial information and may lead to a decline in our stock price. Sales of a substantial number of shares of our common stock in the public market could cause our stock price to decline. Sales of a substantial number of shares of our common stock in the public market could occur at any time. These sales, or the perception in the market that our officers, directors or the holders of a large number of shares of common stock intend to sell shares, could reduce the market price of our common stock. As of March 7, 2016, we had approximately 18,066,345 shares of common stock outstanding. Of these shares, all of the shares of our common stock sold in our initial public offering, which was completed on November 3, 2014, and all of the shares sold in our follow-on public offering, which was completed on September 23, 2015 are freely tradable, without restriction, in the public market. Each of our directors and officers and substantially all of our stockholders, optionholders and warrantholders entered into lock-up agreements with the underwriters in connection with our initial public offering and our follow-on public offering. The lock-up agreements for the IPO expired on April 27, 2015, and the lock-up agreements for the follow-on public offering expired on December 23, 2015. Based on shares outstanding as of March 7, 2016, and information contained in Form 4s and Schedule 13Gs filed with the SEC, up to an additional 4,947,083 shares of common stock became eligible for sale in the public market, approximately 17,306 of which are held by our executive officers and directors and approximately 4,929,777 of which are held by our affiliates (including stockholders affiliated with our directors) and subject to volume limitations under Rule 144 under the Securities Act. Holders of an aggregate of approximately 6,287,277 shares of our common stock have rights, subject to some conditions, to require us to file registration statements covering their shares or to include their shares in registration statements that we may file for ourselves or other stockholders. As of March 7, 2016 , options to purchase an aggregate of 2,217,238 shares of our common stock were outstanding under our 2007 Plan and our 2014 Plan, which have been registered on a Registration Statement on Form S-8, and an additional, 672,612 shares of common stock are reserved for issuance under our 2014 Plan are registered on the Registration Statement on Form S-8. These shares can be freely sold in the public market upon issuance and once vested. 46 Table of Contents In addition , on March 7, 2016, we adopted an Inducement Plan pursuant to which our board of directors may grant stock options or restricted stock units which may be exercised or settled, as applicable, for up to an aggregate of 180,000 shares of our common stock, to new employees as inducement material to such new employees entering into employment with us. We intend to register the 180,000 shares of common stock reserved pursuant to our Inducement Plan on a Registration Statement on Form S- 8 after which shares issued pursuant to options or restricted stock awards granted under the Inducement Plan may be freely sold in the public market once vested. We cannot predict what effect, if any, sales of our shares in the public market or the availability of shares for sale will have on the market price of our common stock. Future sales of substantial amounts of our common stock in the public market, including shares issued upon exercise of outstanding options or warrants, or the perception that such sales may occur, however, could adversely affect the market price of our common stock and also could adversely affect our future ability to raise capital through the sale of our common stock or other equity-related securities of ours at times and prices we believe appropriate. Future sales and issuances of our common stock or rights to purchase common stock , including pursuant to our equity incentive plans, could result in additional dilution of the percentage ownership of our stockholders and could cause our stock price to fall. We expect that significant additional capital may be needed in the future to continue our planned operations, including conducting clinical trials, commercialization efforts, expanded research and development activities and costs associated with operating a public company. To raise capital, we may sell common stock, convertible securities or other equity securities in one or more transactions at prices and in a manner we determine from time to time. If we sell common stock, convertible securities or other equity securities, investors may be materially diluted by subsequent sales. Such sales may also result in material dilution to our existing stockholders, and new investors could gain rights, preferences and privileges senior to the holders of our common stock. Pursuant to the 2014 Plan, our management is authorized to grant stock options to our employees, directors and consultants. As of December 31, 2015, the number of shares of common stock reserved for issuance under our 2014 plan was 1,325,759 . The number of shares of our common stock reserved for issuance under the 2014 Plan automatically increase s on January 1 of each year, beginning on January 1, 2015 and continuing through and including January 1, 2024, by 4% of the total number of shares of our capital stock outstanding on December 31 of the preceding calendar year, or a lesser number of shares determined by our board of directors. Unless our board of directors elects not to increase the number of shares available for future grant each year, our stockholders may experience additional dilution, which could cause our stock price to fall. Pursuant to the foregoing provision, effective January 1, 2016, our board of directors increased the number of shares of common stock reserved for issuance under the 2014 Plan by 4% of the number of shares of our capital stock outstanding on December 31, 201 5 , or 719,736 shares. Our board of directors adopted our ESPP in July 2014 and our stockholders approved the ESPP in October 2014. Our ESPP is intended to qualify as an employee stock purchase plan under Section 423 of the Code. The ESPP became effective upon the completion of the IPO. As of December 31, 2015, the number of shares of common stock reserved for issuance under our ESPP was 404,629 . The number of shares of our common stock reserved for issuance under the ESPP a utomatically increase s on January 1 of each year, beginning on January 1, 2015 and continuing through and includi ng January 1, 2024, by 1 % of the total number of shares of our capital stock outstanding on December 31 of the preceding calendar year, or a lesser number of shares determined by our board of directors. Unless our board of directors elects not to increase the number of shares available for future grant each year, our stockholders may experience additional dilution, which could cause our stock price to fall. Pursuant to the foregoing provision, effective January 1, 2016, our board of directors increased the number of shares of common stock reserved for issuance under the ESPP by 1 % of the number of shares of our capital stock outstanding on December 31, 201 5 , or 179,934 shares. Pursuant to our Inducement Plan, our board of directors is authorized to grant stock options or restricted stock units which may be exercised or settled, as applicable, for up to an aggregate of 180,000 shares of our common stock to new employees as inducements material to such new employees entering into employment with us. The number of shares which may be granted under the Inducement Plan may be increased in the future by our board of directors. 47 Table of Contents Our management team may invest or spend the proceeds from our IPO and our follow-on public offering in ways with which you may not agree or in ways which may not yield a return. Our management has considerable discretion in the application of the net proceeds from our public offerings, and you will not have the opportunity as part of your investment decision to assess whether the net proceeds are being used appropriately. Because of the number and variability of factors that will determine our use of the net proceeds from our public offerings, their ultimate use may vary substantially from their currently intended use. Our management might not apply our net proceeds in ways that ultimately increase the value of your investment. We expect that we will use the net proceeds from our public offerings for the following purposes: (i) we may acquire or invest in complementary products, technologies, businesses or international expansion opportunities; however, we currently have no agreements or commitments to complete any such transaction, and (ii) for working capital and other general corporate purposes. We also used a portion of the net proceeds from our public offerings to repay our long-term debt. The failure by our management to apply these funds effectively could harm our business. Pending their use, we may invest the net proceeds from our public offerings in high-quality, short-term interest- bearing obligations, investment-grade instruments, certificates of deposit or direct or guaranteed obligations of the U.S. government. These investments may not yield a favorable return to our stockholders. If we do not invest or apply the net proceeds from our public offerings in ways that enhance stockholder value, we may fail to achieve expected financial results, which could cause our stock price to decline. Anti-takeover provisions in our organizational documents and under Delaware law may discourage or prevent a change of control, even if an acquisition would be beneficial to our stockholders, which could reduce our stock price and prevent our stockholders from replacing or removing our current management. Our amended and restated certificate of incorporation and amended and restated bylaws contain provisions that could delay or prevent a change of control of our company or changes in our board of directors that our stockholders might consider favorable. Some of these provisions include: · · · · · · · a board of directors divided into three classes serving staggered three-year terms, such that not all members of the board will be elected at one time; a prohibition on stockholder action through written consent, which requires that all stockholder actions be taken at a meeting of our stockholders; a requirement that special meetings of stockholders be called only by the chairman of the board of directors, the chief executive officer, or by a majority of the total number of authorized directors; advance notice requirements for stockholder proposals and nominations for election to our board of directors; a requirement that no member of our board of directors may be removed from office by our stockholders except for cause and, in addition to any other vote required by law, upon the approval of not less than two-thirds of all outstanding shares of our voting stock then entitled to vote in the election of directors; a requirement of approval of not less than two-thirds of all outstanding shares of our voting stock to amend any bylaws by stockholder action or to amend specific provisions of our certificate of incorporation; and the authority of the board of directors to issue preferred stock on terms determined by the board of directors without stockholder approval and which preferred stock may include rights superior to the rights of the holders of common stock. We are subject to the provisions of Section 203 of the General Corporation Law of the State of Delaware, which may prohibit certain business combinations with stockholders owning 15% or more of our outstanding voting stock. These and other provisions in our amended and restated certificate of incorporation, amended and restated bylaws and Delaware law could make it more difficult for stockholders or potential acquirers to obtain control of our board of directors or initiate actions that are opposed by our then-current board of directors, including a merger, tender offer or proxy contest involving our Company. Any delay or prevention of a change of control transaction or changes in our board of directors could cause the market price of our common stock to decline. 48 Table of Contents If securities or industry analysts issue an adverse or misleading opinion regarding our stock, our stock price and trading volume could decline. The trading market for our common stock will be influenced by the research and reports that industry or securities analysts publish about us or our business. If any of the analysts who cover us issue an adverse or misleading opinion regarding us, our business model, our intellectual property or our stock performance, or if our clinical trials and operating results fail to meet the expectations of analysts, our stock price would likely decline. If one or more of these analysts cease coverage of us, or fail to publish reports on us regularly, including the recent suspension of our rating by certain analysts as a result of recent events involving Silimed, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline. Item 1B.  Unresolved Staff Comment s Not applicable. Item 2.  Propertie s Our headquarters located in Santa Barbara, California is approximately 20,000 square feet. The term of the lease for our headquarters expires in February 2020. We also lease warehouse space s located in Santa Barbara, California, which is approximately 10,000 square feet . The lease term expir es in January 201 9 . We believe that our existing facilities are adequate for our current needs. As additional space is needed in the future, we believe that suitable space will be available in the required locations on commercially reasonable terms. Item 3.  Legal Proceeding s On September 25, 2015, a lawsuit styled as a class action of the Company’s stockholders was filed in the United States District Court for the Central District of California. The lawsuit names the Company and certain of our officers as defendants and alleges violations of Sections 10(b) and 20(a) of the Exchange Act in connection with allegedly false and misleading statements concerning our business, operations, and prospects. The plaintiff seeks damages and an award of reasonable costs and expenses, including attorneys’ fees. On November 24, 2015, three stockholders (or groups of stockholders) filed motions to appoint lead plaint i ff(s) and to approve their selection on lead counsel. On December 10, 2015, the court entered an order appointing lead plaintiffs and approving their selection of lead counsel. On February 19, 2016, lead plaintiffs filed their consolidated amended complaint. On October 28, November 5 , and November 19 , 2015, three lawsuits styled as class actions of the Company’s stockholders were filed in the Superior Court of California for the County of San Mateo. The lawsuits name the Company , certain of our officers and directors, and the underwriters associated with our follow-on public offering that closed on September 23, 2015 as defendants. The lawsuits allege violations of Sections 11, 12(a)(2), and 15 of the Securities Act in connection with allegedly false and misleading statements in our offering documents associated with the follow-on offering concerning our business , operations, and prospects. The plaintiffs seek damages and an award of reasonable costs and expenses, including attorneys’ fees. On December 4, 2015, defendants removed all three lawsuits to the United States District Court for the Northern District of California. On December 15 and December 16, 2015, plaintiffs filed motions to remand the lawsuits back to San Mateo Superior Court , or the Motions to Remand. On January 19, 2016, defendants filed their opposition to the Motions to Remand, and plaintiffs filed their reply in support of the Motions to Remand on January 26, 2016. It is possible that additional suits will be filed, or allegations made by stockholders, with respect to these same or other matters and also naming the Company and/or our officers and directors as defendants. We believe we have meritorious defenses and intend to defend these lawsuits vigorously. Due to the early stage of these proceedings, we are not able to predict or reasonably estimate the ultimate outcome or possible losses relating to these claims. Item 4.  Mine Safety Disclosure s Not applicable. 49 Table of Contents PART I I Item  5.    Market  for  Registrant’s  Common  Equit  y,  Related  Stockholder  Matters  and  Issuer  Purchases  of  Equity    Securities Our common stock has been traded on the NASDAQ Global Select Market under the symbol “SIEN” since our initial public offering on October 29, 2014. Prior to this time, there was no public market for our common stock. The following table shows the high and low sale prices per share of our common stock as reported on the NASDAQ Global Select Market for the periods indicated: Year ended December 31, 2015 First Quarter Second Quarter Third Quarter Fourth Quarter Year ended December 31, 2014 Fourth Quarter (beginning October 29, 2014) High Low $ $ 20.93 26.67 25.94 10.61 14.02 15.93 9.38 2.78 $ 19.99 $ 12.53 On March 7, 2016 , the last reported sale price for our common stock on the NASDAQ Global Select Market was $8.07 per share. Stock Performance Graph The graph set forth below compares the cumulative total stockholder return on our common stock between October 29, 2014 (the date of our initial public offering) and December 31, 2015, with the cumulative total return of (a) the NASDAQ Health Care Index and (b) the NASDAQ Composite Index, over the same period. This graph assumes the investment of $100 on October 29, 2014 in our common stock, the NASDAQ Health Care Index and the NASDAQ Composite Index and assumes the reinvestment of dividends, if any. The graph assumes our closing sales price on October 29, 2014 of $16.75 per share as the initial value of our common stock and not the initial offering price to the public of $15.00 per share. The comparisons shown in the graph below are based upon historical data. We caution that the stock price performance shown in the graph below is not necessarily indicative of, nor is it intended to forecast, the potential future performance of our common stock. Information used in the graph was obtained from the Nasdaq Stock Market LLC, a financial data provider and a source believed to be reliable. The Nasdaq Stock Market LLC is not responsible for any errors or omissions in such information. 50    Table of Contents CUMULATIVE TOTAL RETURN SUMMARY December 201 5 This performance graph shall not be deemed filed for purposes of Section 18 of the Exchange Act or otherwise subject to liabilities under that section and shall not be deemed to be incorporated by reference into any filing of Sientra, Inc. under the Securities Act, except as shall be expressly set forth by specific reference in such filing. Holders of Record As of March 7, 2016 , there were approximately 118 holders of record of our common stock. The actual number of stockholders is greater than this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities. Dividends We have not paid any cash dividends on our common stock since inception and do not anticipate paying cash dividends in the foreseeable future. Securities A uthorized for I ssuance u nder E quity C ompensation P lans Information about our equity compensation plans is incorporated herein by reference to Item 12 of Part III of this Annual Report on Form 10 ‑K. Use of Proceeds from Public Offering of Common Stock On November 3, 2014, we closed the sale of 5,750,000 shares of common stock to the public (inclusive of 750,000 shares of common stock sold by us pursuant to the full exercise of an overallotment option granted to the underwriters) at a price of $15.00 per share. The offer and sale of the shares in the IPO was registered under the Securities Act pursuant to registration statements on Form S ‑1 (File No. 333 ‑198837), which was filed with the SEC, on September 19, 2014 and amended subsequently and declared effective on October 28, 2014. Piper Jaffray & Co. and Stifel, Nicolaus & Company, Incorporated acted as managing underwriters of the offering. We raised approximately $77.0 million in net proceeds after deducting underwriting discounts and commissions of approximately $6.0 million and other offering expenses of approximately $3.2 million. None of these expenses consisted of payments made by us to directors, officers or persons owning 10% or more of our common stock or to their associates, or to our affiliates. 51 Table of Contents On September 23, 2015, we closed the sale of 3,000,000 shares of common stock in a f ollow-on public offering at a price of $22.00 per share. The offer and sale of the shares in the follow-on offering were registered under the Securities Act pursuant to registration statements on Form S-1 (File No. 333-206755), which was filed with the SEC and declared effective on September 17, 2015. Piper Jaffray & Co. and Stifel, Nicolaus & Company, Incorporated acted as joint book-running managers and Leerink Partners, LLC and William Blair & Company, LLC . acted as co-managers. We raised approximately $61.4 million in net proceeds after deducting underwriting discounts and commissions of approximately $4.0 million and other offering expenses of approximately $0.6 million. None of these expenses consisted of payments made by us to directors, officers or persons owning 10% or more of our common stock or to their associates, or to our affiliates. Upon receipt, the net proceeds from our IPO and our follow-on public offering were held in cash and cash equivalents, primarily bank money market accounts. There has been no material change in our planned use of the net proceeds from the offering as described in our final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act on October 29, 2014, or from our follow-on public offering as described in our final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act on September 23, 2015. The amount and timing of our actual expenditures depend on numerous factors, including the ongoing status of and results from clinical trials, as well as any unforeseen cash needs. Accordingly, our management will have broad discretion in the application of the net proceeds. Purchases of Equity Securities by the Issuer or Affiliated Purchasers There were no repurchases of shares of common stock made during the year ended December 31, 2015 . Item 6.  Selected Financial Dat a The following selected financial data should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations”, the financial statements and related notes, and other financial information included in this Annual Report on Form 10 ‑K. We derived the financial data for the years ended December 31, 2015 , 2014 and 2013 and as of December 31, 2015 and 2014 from our financial statements, which are included elsewhere in this Annual Report on Form 10 ‑K. The financial data for the year ended December 31, 2012 and as of December 31, 2013 are derived from audited financial statements which are not included in this Form 10-K. Historical results are not necessarily indicative of the results to be expected in future periods. Statement of operations data Net sales Gross profit Net loss Net loss per share Basic and diluted Weighted average shares Basic and diluted Balance sheet data Working capital Total assets Long-term debt, excluding current position Stockholders' equity (deficit) Year Ended December 31, 2015 2014 2013 2012 (in thousands, except share data) $ 38,106 $ 27,452 (41,230) 44,733 $ 35,171 $ 10,447 26,579 33,233 8,095 (23,433) (19,125) (5,811) $ (2.61) $ (2.28) $ (82.25) $ (85.01) 15,770,972 2,545,371 232,512 275,642 As of December 31, 2015 2014 2013 (in thousands) $ 118,609 $ 103,151 $ 140,805 — 118,871 139,078 21,671 95,639 52 24,509 53,166 15,092 (126,673)       Table of Contents Item 7.  Management’s Discussion and Analysi s of Financial Condition and Results of Operations The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our financial statements and related notes appearing elsewhere in this Annual Report on Form 10 ‑K. This discussion contains forward ‑looking statements that reflect our plans, estimates and beliefs, and involve risks and uncertainties. Our actual results and the timing of certain events could differ materially from those anticipated in these forward ‑looking statements as a result of several factors, including those discussed in the section titled “Risk Factors” included under Part I, Item 1A and elsewhere in this Annual Report. See “Special Note Regarding Forward ‑Looking Statements” in this Annual Report. Overview We are a medical aesthetics company committed to making a difference in patients’ lives by enhancing their body image, growing their self ‑esteem and restoring their confidence. We were founded to provide greater choice to board ‑certified plastic surgeons and patients in need of medical aesthetics products. We have developed a broad portfolio of products with technologically differentiated characteristics, supported by independent laboratory testing and strong clinical trial outcomes. We sell our breast implants and breast tissue expanders, or Breast Products, exclusively to board-certified and board-admissible plastic surgeons and tailor our customer service offerings to their specific needs, which we believe helps secure their loyalty and confidence. Our primary products are silicone gel breast implants for use in breast augmentation and breast reconstruction procedures, which we offer in over 195 variations of shapes, sizes , fill volumes and textures. Our breast implants are primarily used in elective procedures which are generally performed on a cash ‑pay basis. Many of our breast implants incorporate one or more differentiated technologies, including a proprietary high ‑strength, cohesive silicone gel and proprietary texturing branded TRUE Texture ® . Our breast implants offer a desired balance between strength, shape retention and softness due to the high- strength, cohesive silicone gel used in our manufacturing process. TRUE Texture ® provides texturing on the implant shell that is designed to reduce the incidence of malposition, rotation and capsular contracture. We also offer breast tissue expanders and a range of other aesthetic and specialty products. We do not have any patents or patent applications, but rely on trade secrets, proprietary know ‑how and regulatory barriers to protect our products and technologies. Our breast implants were approved by the U.S. Food and Drug Administration, or FDA, in 2012, based on data we collected from our ongoing, long ‑term clinical trial of our breast implants in 1,788 women across 36 investigational sites in the United States , which included 3,506 implants (approximately 53% of which were smooth and 47% of which were textured). Our clinical trial is the largest prospective, long-term safety and effectiveness pivotal study of breast implants in the United States and included the largest magnetic resonance imaging, or MRI, cohort with 571 patients. The MRI cohort is a subset of study patients that underwent regular MRI screenings in addition to the other aspects of the clinical trial protocol prior to FDA approval. Post- approval, all patients in the Study are subject to serial MRI screening as part of the clinical protocol . The clinical data we collected over an eight-year follow-up period demonstrated rupture rates, capsular contracture rates and reoperation rates that were comparable to or better than those of our competitors, at similar time points. In addition to our pivotal study, our clinical data is supported by our Continued Access Study of 2,497 women in the United States. We have also commissioned a number of bench trials run by independent laboratories that we believe further demonstrate the advantages of our breast implants over those of our competitors . We sell our Breast Products exclusively to board-certified and board-admissible plastic surgeons, who we refer to as Plastic Surgeons. We seek to provide Plastic Surgeons with differentiated services, including enhanced customer service offerings, a ten-year limited warranty that is the best-in-the-industry based on providing patients with the largest cash reimbursement for certain out-of-pocket costs related to revision surgeries in a covered event; a lifetime no-charge implant replacement program for covered ruptures; and our industry-first CapCon Care Program, or C3 Program, through which we offer no-charge replacement implants to breast augmentation patients who experience capsular contracture within the first five years after implantation with our smooth or textured breast implants . We sell our products in the United States through a direct sales organization consisting of 51 employees, including 43 sales representatives and 8 sales managers, as of December 31, 2015 . 53 Table of Contents Silimed Related Developments On September 23, 2015, MHRA, an executive agency of the U.K., issued a press release announcing the suspension of sales and implanting in U.K . of all medical devices manufactured by Silimed following the suspension of the CE certificate of these products issued by TUV SUD, Silimed’s notified body under EU regulation. The suspension of Silimed’s CE certificate by TUV SUD followed TUV SUD’s inspection at Silimed’s manufacturing facilities in Brazil, relating to particles on Silimed breast products. On October 2, 2015, the Brazilian regulatory agency ANVISA and the Department of the Secretary of State of the State of Rio de Janeiro announced that while they continue to review the technical compliance related to GMP of Silimed’s manufacturing facility, and as a precautionary measure, they temporarily suspended the manufacturing and shipment of all medical devices made by Silimed, including products manufactured for Sientra. ANVISA reiterated that no risks to patient health have been identified in connection with implanting Silimed products, and, accordingly, there is no need to adopt any procedure or action for those patients who have received them. Furthermore, ANVISA also indicated that, based on their contact to date with foreign regulatory authorities, there have been no reports of adverse events related to this issue. On October 9, 2015, we voluntarily placed a hold on the sale of all Sientra devices manufactured by Silimed and recommended that plastic surgeons discontinue implanting the devices until further notice. The Company had ongoing discussions with the FDA regarding European and Brazilian regulatory inquiries into Silimed products, and conducted its own review of the matter with the assistance of independent experts in quality management systems, GMP and data-based risk assessment. The FDA also reiterated that no reports of adverse events and no risks to patient health had been identified in connection with this issue. On October 22, 2015, there was a fire at one of Silimed’s two manufacturing buildings in Rio de Janeiro, Brazil. The fire occurred in the building where Sientra’s breast implants are primarily manufactured, or building F2. Silimed has indicated to the Company that a smaller production facility in Silimed’s second building, or building F1, which was not impacted by the fire, has the potential to be modified for breast implant manufacturing. In order to commence the manufacturing of breast implants, certain areas in building F1 would need to be reconfigured and receive certification and approval by appropriate regulatory bodies. The Company is working with Silimed to seek clarity as to the near and long-term capabilities of Silimed’s manufacturing operations, including the status of equipment that is used to manufacture breast implants and the potential feasibility, production capacity and timing related to Silimed’s ability to manufacture our breast implants. Recent Developments On January 27, 2016, after completing an analysis and risk assessment, ANVISA announced their authoriz ation of Silimed to resume the commercialization and use of its previously manufactured products. ANVISA concluded there was no evidence to prove that the presence of surface particles on the silicone implants represented risks which are additional to the ones inherent in the product. However, Silimed continues to be suspended from manufacturing and commercializing new batches of implants until an inspection is performed to reassess the fulfillment of its GMP compliance . On March 1, 2016, after the completion of extensive independent, third-party testing and analyses of our Breast Products in the U.S., we lifted the temporary hold on the sale of our devices manufactured by Silimed. We also sent a letter to our Plastic Surgeons informing them of the Company’s market re-entry plans. The conclusive results of our testing indicate no anticipated significant safety concerns with the use of our products, including our breast implants, consistent with their approval status since 2012. Components of Operating Results Net Sales We commenced sales of our breast implants in the United States in the second quarter of 2012 and our Breast Products have historically accounted for substantially all of our net sales. Sales of our Breast Products accounted for 98% , 97% and 97% of our net sales for the years ended December 31, 2015 , 2014 and 2013 , respectively . 54 Table of Contents We recognize revenue, net of sales discounts and estimated returns, as the customer has a standard six-month window to return purchased products. There are several uncertainties regarding the recent events involving Silimed that may have a material unfavorable impact on our net sales, including the suspension of the sale and manufacturing of Silimed’s products by certain foreign regulatory agencies, our voluntary hold on the sale and implanting of all Sientra devices manufactured by Silimed between October 9, 2015 and March 1, 2016, our uncertainty regarding the resolution of the regulatory inquiries , the delay of sales pending such resolution , and our uncertainty of our customers responsiveness to our market re-entry . Additionally, the recent fire at Silimed’s facility that manufactures our breast implants, including the status of equipment that is used to manufacture such implants and the potential feasibility, production capacity and timing related to Silimed’s ability to manufacture breast implants in other facilities, may affect inventory adjustments and have an additional unfavorable impact on our net sales. We expect that, in the future, assuming a favorable outcome of the aforementioned recent events, that our net sales will fluctuate on a quarterly basis due to a variety of factors, including seasonality of breast augmentation procedures. We believe that breast implant sales are subject to seasonal fluctuation due to breast augmentation patients’ planning their surgery leading up to the summer season and in the period around the winter holiday season. Cost of Goods Sold and Gross Margin Cost of goods sold consists primarily of costs of finished products purchased from our third ‑party manufacturer, reserve for product warranties and warehouse and other related costs. Our silicone gel breast implants, tissue expanders and other products are manufactured under an exclusive contract with Silimed. Under our contract with Silimed, each particular style of implant has a fixed unit cost. In addition to product costs, we provide a commercial warranty on our silicone gel filled breast implants. The warranty covers device ruptures in certain circumstances. Estimated warranty costs are recorded at the time of sale. Our warehouse and other related costs include labor, rent, product shipments from our third party manufacturer and other related costs. We expect our overall gross margin, which is calculated as net sales less cost of goods sold for a given period divided by net sales, to fluctuate in future periods primarily as a result of quantity of units sold, manufacturing price increases, the changing mix of products sold with different gross margins, overhead costs and targeted pricing programs. Sales and Marketing Expenses Our sales and marketing expenses primarily consist of salaries, bonuses, benefits, incentive compensation and travel for our sales, marketing and customer support personnel. Our sales and marketing expenses also include expenses for trade shows, our no ‑charge customer shipping program and no-charge product evaluation units , as well as educational, promotional and marketing activities, including direct and online marketing. We expect our sales and marketing expenses to fluctuate in future periods as a result of headcount and timing of our marketing programs. However, we generally expect these costs will increase in absolute dollars. Research and Development Expenses Our research and development, or R&D, expenses primarily consist of clinical expenses, product development costs, regulatory expenses, consulting services, outside research activities, quality control and other costs associated with the development of our products and compliance with Good Clinical Practices, or cGCP, requirements. R&D expenses also include related personnel and consultant compensation and stock ‑based compensation expense. We expense R&D costs as they are incurred. We expect our R&D expenses to vary as different development projects are initiated, including improvements to our existing products, expansions of our existing product lines, new product acquisitions and our FDA ‑required PMA post ‑approval studies of our breast implants. However, we generally expect these costs will increase in absolute terms over time as we continue to expand our product portfolio and add related personnel. General and Administrative Expenses Our general and administrative, or G&A, expenses primarily consist of salaries, bonuses, benefits and stock ‑based compensation for our executive, financial, legal, business development and administrative functions. Other G&A expenses 55 Table of Contents include outside legal counsel and litigation expenses, independent auditors and other outside consultants, corporate insurance, employee benefits, facilities and information technologies expenses. Beginning in 2013, G&A expenses also include the federal excise tax on the sale of medical devices in the United States. In addition, for the years ended December 31, 2015, 2014 and 2013, we incurred $0.0 million, $0.0 million and $1.2 million, respectively, of G&A expenses related to the Grader Street arbitration. We expect future G&A expenses to increase as we build our finance, legal, information technology, human resources and other general administration resources to continue to advance the commercialization of our products. In addition, we expect to incur increased G&A expenses in connection with becoming a public company, which may increase further when we are no longer able to rely on the “emerging growth company” exemption we are afforded under the Jumpstart Our Business Startups Act, or the JOBS Act , and legal counsel and litigation expenses in connection with the recently filed lawsuits styled as class actions of the Company’s stockholders . Other (Expense) Income, net Other (expense) income, net primarily consists of interest expense and amortization of debt discount associated with our term loans and insurance recoveries. In 2012, the Company filed a claim with the Hartford Insurance Company, or Hartford for reimbursement of legal costs incurred in connection with litigation with a competitor that was resolved in 2013. The Company held a D&O insurance policy with Hartford, and the Company and Hartford settled the matter in May 2014. The Company received settlement payments from Hartford and recovery of costs associated with the litigation of $0 .0 million , $2 .4 million , and $ 0.4 million for the years ended December 31, 2015, 2014 and 2013, respectively. Critical Accounting Policies and Significant Judgments and Estimates Our discussion and analysis of our financial condition and results of operations are based on our financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, net sales and expenses and the disclosure of contingent assets and liabilities in our financial statements. We evaluate our estimates and judgments on an ongoing basis. We base our estimates on historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about our financial condition and results of operations that are not readily apparent from other sources. Actual results may differ from these estimates. While our significant accounting policies are more fully described in Note 2 to our financial statements, we believe that the following accounting policies to be most critical to the judgments and estimates used in the preparation of our financial statements. Revenue Recognition We sell our products directly to customers in markets where we have regulatory approval. We offer a six ‑month return policy; and we recognize revenue, net of sales discounts and returns, in accordance with the Financial Accounting Standards Board, or FASB, Accounting Standards Codification 605, Revenue Recognition , or ASC 605. ASC 605 requires that six basic criteria must be met before revenue can be recognized when a right of return exists: · · · · · · the seller’s price to the buyer is substantially fixed or determinable at the date of sale; the buyer has paid the seller, or the buyer is obligated to pay the seller and the obligation is not contingent on resale of the product; the buyer’s obligation to the seller would not be changed in the event of theft or physical destruction or damage of the product; the buyer acquiring the product for resale has economic substance apart from that provided by the seller; the seller does not have significant obligations for future performance to directly bring about resale of the product by the buyer; and the amount of future returns can be reasonably estimated. 56 Table of Contents Appropriate reserves are established for anticipated sales returns based on historical experience, recent gross sales and any notification of pending returns. The Company recognizes revenue when title to the product and risk of loss transfer to customers, provided there are no remaining performance obligations required of the Company or any written matters requiring customer acceptance. The Company allows for the return of product from customers within six months after the original sale and records estimated sales returns as a reduction of sales in the same period revenue is recognized. Sales return provisions are calculated based upon historical experience with actual returns. Actual sales returns in any future period are inherently uncertain and thus may differ from the estimates. If actual sales returns differ significantly from the estimates, an adjustment to revenue in the current or subsequent period would be recorded. The Company has established an allowance for sales returns of $0.7 million and $10.0 million as of December 31, 2015 and 2014 , respectively, recorded net against accounts receivable in the balance sheet. A portion of the Company’s revenue is generated from consigned inventory of breast implants maintained at doctor, hospital, and clinic locations. The customer is contractually obligated to maintain a specific level of inventory and to notify the Company upon use. For these products, revenue is recognized at the time the Company is notified by the customer that the product has been implanted. Notification is usually through the replenishing of the inventory and the Company periodically reviews consignment inventories to confirm accuracy of customer reporting. FDA regulations require tracking the sales of all breast implants. Warranty Reserve We offer a limited warranty and a lifetime product replacement program for our silicone gel breast implants. Under the limited warranty program, we will reimburse patients for certain out ‑of ‑pocket costs related to revision surgeries performed within ten years from the date of implantation in a covered event. Under the lifetime product replacement program, we provide no ‑charge replacement breast implants under a covered event. The programs are available to all patients implanted with our silicone breast implants after April 1, 2012 and are subject to the terms, conditions, claim procedures, limitations and exclusions. Timely completion of a device tracking and warranty enrollment form by the patient’s Plastic Surgeon is required to activate the programs and for the patient to be able to receive benefits under either program. We recorded expense for the accru al of warranties in the amounts of $0.4 million, $0.5 million and $0.4 million, for the years ended December 31, 2015, 2014 and 2013 , respectively. As of December 31, 2015 and 2014, we held total warranty liabilities of $1.3 million and $1.0 million, respectively. Stock ‑‑Based Compensation Stock ‑based compensation cost is measured at the date of grant based on the estimated fair value of the award, net of estimated forfeitures. We estimate the fair value of our stock ‑based awards to employees and directors using the Black ‑Scholes option pricing model. The grant date fair value of a stock ‑based award is recognized as an expense over the requisite service period of the award on a straight ‑line basis. The Black ‑Scholes model requires the input of subjective assumptions, including the risk ‑free interest rate, expected dividend yield, expected volatility and expected term, among other inputs. These estimates involve inherent uncertainties and the application of management’s judgment. If factors change and different assumptions are used, our stock ‑based compensation expense could be materially different in the future. We recorded total non ‑cash stock ‑based compensation expense of $2.4 million, $0.6 million and $0.3 million for the years ended December 31, 2015, 2014 and 2013, respectively. As of December 31, 2015 we had total unrecognized compensation costs of $4.7 million related to our stock options and employee stock purchase plan. These costs are expected to be recognized over a weighted average period of 2.95 years. Warrant Liabilities We have issued warrants to Oxford to purchase shares of common stock in connection with our term loan agreement. The warrants are recorded at fair value using either the Black ‑Scholes option pricing model, other binomial valuation model or lattice model, depending on the characteristics of the warrants at the time of the valuation. The fair value of these warrants is re ‑measured at each financial reporting period with any changes in fair value being recognized as a component of other income (expense) in the accompanying statements of operations. We will continue to re ‑measure the warrants to fair value until exercise or expiration of the related warrant. 57 Table of Contents As of December 31, 2015 and 2014, the fair value of our warrant liability was $0.0 million and $0.4 million, respectively. We recognized a decrease of other (income) expense of $0.4 million for the change in fair value of warrants during the year ended December 31, 2015, and an increase of $0.2 million and $0.0 million for the years ended D e cember 31, 2014 and 2013, respectively. Goodwill Goodwill represents the excess of the purchase price over the fair value of net assets of purchased businesses. Goodwill is not amortized, but instead subject to impairment tests on at least an annual basis and whenever circumstances suggest that goodwill may be impaired. Our annual test for impairment is performed as of October 1 of each fiscal year, pursuant to which we make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test. If we conclude that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, we are not required to perform the two-step impairment test for that reporting unit. Under the first step of the test, we are required to compare the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not considered impaired and the second step of the test is not performed. If the results of the first step of the impairment test indicate that the fair value of a reporting unit does not exceed its carrying amount, then the second step of the test is required. The second step of the test compares the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. The impairment loss is measured by the excess of the carrying amount of the reporting unit goodwill over the implied fair value of that goodwill. On September 24, 2015, we experienced a significant decline in our common stock price, which was sustained through September 30, 2015. The significant decline in our common stock price for a sustained period, along with the impact from regulatory inquiries related to medical devices manufactured by Silimed, our contract manufacturer, were identified as potential indicators of impairment of goodwill and other intangibles. As a result, we were required to assess whether or not an impairment of our goodwill had occurred as of Septembe r 30, 2015. We assessed the impact of the recent downward volatility in our common stock price and concluded that the sustained decline constituted a triggering event requiring an interim goodwill impairment test. We conducted the first step of the goodwill impairment test described above for our single reporting unit as of September 30, 2015. The fair value of the reporting unit exceeded its carrying value as of September 30, 2015 by 24.7%, and therefore goodwill was determined to not be impaired as of September 30, 2015. However, a s a result of the events described in “ Silimed Related Developments ”, adverse changes in operating results, an extended period of our common stock trading significantly below book value per share, and unfavorable changes in c ircumstances related to Silimed, we identified additional impairment indicators during the quarter ended December 31, 2015 . For the quarter ended December 31, we performed a step one analysis for possible goodwill impairment. Determining the fair value of the Company as a single reporting unit as part of the step one analysis involves significant judgment. For step one, we used a market approach to determine fair value and concluded that the carrying value of the reporting unit exceeded the estimated fair value, and thus performed the step two analysis. For step two, we compared the implied fair value of the Company’s goodwill with the carrying value of goodwill. 2015, The implied fair value of goodwill is determined in the same manner as goodwill that is recognized in a business combination. Significant judg ments and estimates are involved in the determination of the fair value of the assets and liabilities of the reporting unit, and therefore directly impact the implied fair value of goodwill, as part of the step two analysis. The most significant estimates involved relate to the fair value of intangible asset s. We estimated the value of the intangible asset s using a discounted cash flow approach considering market comparable transactions. Th ese estimates are highly subjective and involve many judgments . For the quarter ended December 31, 2015, we recorded a goodwill impairment charge of $14.3 million. For additional information on the goodwill impairment see Note 5 to the “Notes to Financial Statements ” included herein . 58 Table of Contents Recent Accounting Pronouncements In May 2014, the FASB issued accounting standard update, or ASU, 2014-09, Revenue from Contracts with Customers . The standard was issued to provide a single framework that replaces existing industry and transaction specific U . S . GAAP with a five step analysis of transactions to determine when and how revenue is recognized. The accounting standard update will replace most existing revenue recognition guidance in U . S . GAAP when it becomes effective. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, t o defer the effective date of ASU 2014-09 by one year. Therefore, ASU 2014-09 will become effective for the Company beginning in fiscal year 2018. Early adoption would be permitted for the Company beginning in fiscal year 2017. The standard permits the use of either the retrospective or cumulative transition method. The Company is currently evaluating the accounting, transition and disclosure requirements of the standard and cannot currently estimate the financial statement impact of adoption. In April 2015, the FASB issued accounting standard update 2015-03 , Interest — Imputation of Interest . The standard was issued to simplify the presentation of debt issuance costs and require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. This accounting standard update will be effective for the Company beginning in fiscal year 2016. The Company anticipates there will be no material impact on its financial statement upon adoption of this guidance. In April 2015, the FASB issued accounting standard update 2015-05 , Intangibles — Goodwill and Other — Internal- Use Software . The standard was issued to provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. This accounting standard update will be effective for the Company beginning in fiscal year 2016. The Company anticipates there will be no material impact on its financial statement upon adoption of this guidance. In July 2015, the FASB issued accounting standard update 2015-11 , Inventory — Simplifying the Measurement of Inventory . The standard simplifies the subsequent measurement of inventory by requiring inventory to be measured at the lower of cost and net realizable value, thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. The accounting standards update will not apply to inventories that are measured by using either the last- in, first-out method or the retail inventory method. This accounting standard update will be effective for the Company beginning in fiscal year 2017. The Company anticipates there will be no material impact on its financial statement upon adoption of this guidance. In November 2015, the FASB issued accounting standard update 2015-17, Income Taxes – Balance Sheet Classification of Deferred Taxes. The standard simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities be classified as noncurrent in a classified statement of financial position. Current GAAP requires an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts. This accounting standard update will be effective for the Company beginning in fiscal year 2017. The Company anticipates there will be no material impact to its financial statement upon adoption of this guidance. In February 2016, the FASB issued accounting standard update 2016-02, Leases (Topic 842) which supersedes FASB Accounting Standard Codification Leases (Topic 840). The standard is intended to increase the transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. This accounting standard update will be effective for the Company beginning in fiscal year 2019. The Company is currently evaluating the impact that adoption of the standard will have on the financial statements and related disclosures. 59 Table of Contents Results of Operations Comparison of the Years Ended December 31, 2015 and 2014 The following table sets forth our results of operations for the years ended December 31, 2015 and 2014 : Statement of operations data Net sales Cost of goods sold Gross profit Operating Expenses Sales and marketing Research and development General and administrative Goodwill impairment Total operating expenses Loss from operations Other (expense) income, net Interest income Interest expense Other income (expense), net Total other (expense) income, net Net loss Net Sales Year Ended December 31, 2015 2014 (in thousands) $ $ 38,106 $ 10,654 27,452 25,762 7,199 18,738 14,278 65,977 (38,525) 32 (3,097) 360 (2,705) (41,230) $ 44,733 11,500 33,233 23,599 4,707 10,712 — 39,018 (5,785) — (2,172) 2,146 (26) (5,811) Net sales decreased $6.6 million, or 14.8% , to $38.1 million for the year ended December 31, 2015 , as compared to $44.7 million for the year ended December 31, 2014 . This decrease was primarily driven by our voluntary hold on the sale and implanting of all Sientra devices manufactured by Silimed on October 9, 2015. There are several uncertainties regarding the recent events involving Silimed that may have a material unfavorable impact on our net sales, including the suspension of the sale and manufacturing of Silimed’s products by certain foreign regulatory agencies, our voluntary hold on the sale and implanting of all Sientra devices manufactured by Silimed between October 9, 2015 and March 1, 2016 , our uncertainty regarding the resolution of the regulatory inquiries and the delay of sales pending such resolution. Additionally, the recent fire at Silimed’s facility that manufactures our breast implants, including the status of equipment that is used to manufacture such implants and the potential feasibility, production capacity and timing related to Silimed’s ability to manufacture breast implants in other facilities, may affect inventory adjustments and have an additional unfavorable impact on our net sales. As of December 31, 2015, our sales organization included 51 employees, as compared to 46 employees as of December 31, 2014. Cost of Goods Sold and Gross Margin Cost of goods sold decreased $0.8 million, or 7.4% , to $10.7 million for the year ended December 31, 2015 , as compared to $11.5 million for the year ended December 31, 2014 . This decrease was primarily due to a decrease in sales volume driven by our voluntary hold on sales. The gross margins for the years ended December 31, 2015 and 2014 were 72.0% and 74.3% , respectively. The decrease in gross margin was primarily due to an incremental $0.3 million reserve for inventory obsolescence recorded in the third quarter for product that we estimate to expire prior to being sold, greater fixed overhead as a percentage of net sales, and manufacturing cost increases. 60 Table of Contents Sales and Marketing Expenses Sales and marketing expenses increased $2.2 million, or 9.2% , to $25.8 million for the year ended December 31, 2015 , as compared to $23.6 million for the year ended December 31, 2014 . This was primarily due to a $3.2 million increase in employee related expense s for the sales department offset by a $0.9 million decrease in marketing costs. Research and Development Expenses R&D expenses increased $2.5 million, or 52.9% , to $7.2 million for the year ended December 31, 2015 , as compared to $4.7 million for the year ended December 31, 2014 . This was primarily due to an increase in product development costs. General and Administrative Expenses G&A expenses increased $8.0 million, or 74.9% , to $18.7 million for the year ended December 31, 2015 , as compared to $10.7 million for the year ended December 31, 2014 . This increase was primarily due to an increase in expenses that relate to operating as a public company , termination benefits for certain former executives , and outside legal counsel costs. Goodwill Impairment Goodwill impairment charges for the year ended December 31, 2015 was $14.3 million. For additional information on th ese goodwill impairments, see “ Critical Accounting Policies and Significant Judgments and Estimates —Goodwill Impairment” and Note 5 to our Financial Statements included herein. Other (Expense) Income, net Total other (expense) income, net for the year ended December 31, 2015 was primarily associated with interest expense on our term loans of $3.1 million, offset by income recognized for the change in fair value of warrants of $0.4 million. Total other (expense) income, net for the year ended December 31, 2014 was primarily associated with interest expense on our term loans of $2.2 million, offset by income from settlement payments from Hartford and recovery of costs associated with the litigation of $2. 4 million. 61 Table of Contents Comparison of the Years Ended December 31, 2014 and 2013 The following table sets forth our results of operations for the years ended December 31, 2014 and 2013 : Statement of operations data Net sales Cost of goods sold Gross profit Operating Expenses Sales and marketing Research and development General and administrative Total operating expenses Loss from operations Other (expense) income, net: Interest expense Other income (expense), net Total other (expense) income, net Net loss Net Sales Year Ended December 31, 2014 2013 (in thousands) 44,733 $ 11,500 33,233 23,599 4,707 10,712 39,018 (5,785) (2,172) 2,146 (26) (5,811) $ 35,171 8,592 26,579 22,229 4,479 18,078 44,786 (18,207) (872) (46) (918) (19,125) $ $ Net sales increased $9.6 million, or 27.2%, to $44.7 million for the year ended December 31, 2014, as compared to $35.2 million for the year ended December 31, 2013. This increase was primarily driven by sales of our Breast Products in the United States resulting from increased sales and marketing activities and boarder adoption of Sientra’s product offerings by board ‑certified Plastic Surgeons. As of December 31, 2014, our sales organization included 46 employees, as compared to 39 employees as of December 31, 2013. Cost of Goods Sold and Gross Margin Cost of goods sold increased $2.9 million, or 33.8%, to $11.5 million for the year ended December 31, 2014, as compared to $8.6 million for the year ended December 31, 2013. This increase was primarily due to an increase in sales volume. The gross margins for the years ended December 31, 2014 and 2013 were 74.3% and 75.6%, respectively. The decrease in gross margin was primarily due to a manufacturing price increase, and the launch of new line extension in the fourth quarter, offset by holding fixed overhead relatively constant. Sales and Marketing Expenses Sales and marketing expenses increased $1.4 million, or 6.2%, to $23.6 million for the year ended December 31, 2014, as compared to $22.2 million for the year ended December 31, 2013. This was primarily due to a $1.8 million increase in employee related expense for the sales department offset by a $0.4 million decrease in marketing costs. Research and Development Expenses R&D expenses increased $0.2 million, or 5.1%, to $4.7 million for the year ended December 31, 2014, as compared to $4.5 million for the year ended December 31, 2013. This was primarily due to an increase in employee related expenses and costs associated with our PMA post ‑approval requirements. 62 Table of Contents General and Administrative Expenses G&A expenses decreased $7.4 million, or 40.7%, to $10.7 million for the year ended December 31, 2014, as compared to $18.1 million for the year ended December 31, 2013. This decrease was primarily due to the $10.1 million decrease in litigation expenses related to the Mentor litigation , partially offset by an increase in expenses related to accounting related costs and federal excise tax. Other (Expense) Income, net Total other (expense) income, net for the year ended December 31, 2014 was primarily associated with interest expense on our term loans of $2.2 million and income from recovery of costs associated with the Mentor litigation of $2.4 million. Total other (expense) income, net for the year ended December 31, 2013 was primarily associated with interest expense on our term loans of $0.9 million. Liquidity and Capital Resources Since our inception, we have incurred significant net operating losses and anticipate that our losses will continue in the near term. We expect our operating expenses will continue to grow as we expand our operations. We will need to generate significant net sales to achieve profitability. To date, we have funded our operations primarily with proceeds from the sales of preferred stock, borrowings under our term loans, sales of our products since 2012, and the proceeds from the sale of our common stock in our initial public offering and recent follow-on offering . To date, we have received gross proceeds from the sales of preferred stock totaling $151.0 million. We issued and sold preferred stock for aggregate gross proceeds of $65.0 million in March 2012, which was our most recent issuance and sale of preferred stock. As of December 31, 201 5 , we had no long-term debt. On November 3, 2014, we completed our IPO of common stock in which we sold 5,000,000 shares at a price of $15.00 per share. Additionally, the underwriters exercised their option to purchase an additional 750,000 shares at $15.00 per share. As a result of our IPO, we raised a total of approximately $77.0 million in net proceeds after deducting underwriting discounts and commissions of approximately $6.0 million and offering expenses of approximately $3.2 million. Costs directly associated with our IPO were capitalized and recorded as deferred IPO costs in other current assets prior to the completion of our IPO. Upon completion of the IPO, the issuance costs were reclassified to additional ‑paid ‑in capital to offset the IPO proceeds. Upon completion of our IPO, all outstanding shares of our convertible preferred stock were converted into 8,942,925 shares of common stock. On September 23, 2015, we completed our follow-on public offering of common stock in which we sold 3,000,000 shares at a price of $22.00 per share. As a result of our follow-on offering, we raised a total of approximately $61.4 million in net proceeds after deducting underwriting discounts and commissions of approximately $4.0 million and offering expenses of approximately $0.6 million. As of December 31, 2015 , we had $112.8 million in cash and cash equivalents. Our historical cash outflows have primarily been associated with research and development activities, especially related to obtaining FDA approval for our breast implant portfolio and complying with the FDA’s post-approval requirements, the Mentor litigation, activities relating to commercialization and increases in working capital, including the purchase of inventory as well as the expansion of our sales force and marketing programs. We believe that our available cash on hand will be sufficient to satisfy our liquidity requirements for at least the next 12 months. However, we expect that the recent events involving Silimed, including our voluntary hold on the sale and implanting of all Sientra devices manufactured by Silimed between October 9, 2015 and March 1, 2016 , our uncertainty regarding the amount of additional expenses we may incur in connection with regulatory inquiries and our own review and testing, as well as expenses we may incur in connection with reestablishing our inventory supply as a result of the fire in Silimed’s manufacturing facility and expenses we may incur defending against litigation claims, may have a material effect on our future cash outflows and Sientra’s liquidity. Additionally, on October 28, 2015, following our repayment of all principal, interest, other amounts and obligations owed to Oxford under the term loans for a total of $24.5 million, the Company has no outstanding debt obligations. As a result of the recent events and the resulting potential demands on Sientra’s liquidity, we may be required to seek additional funds in the future from public or private offerings of our capital stock, borrowings under term loans or other sources. 63 Table of Contents Cash Flows The following table shows a summary of our cash flows provided by (used in) operating, investing and financing activities for the periods indicated: Net cash provided by (used in): Operating activities Investing activities Financing activities Net change in cash and cash equivalents Cash (used in) provided by operating activities Year Ended December 31, 2015 2014 (in thousands) $ $ (18,184) $ (1,128) 35,384 16,072 $ 450 (439) 86,996 87,007 Net cash used in operating activities was $18.2 million during the year ended December 31, 2015 as compared to net cash provided by operating activities of $0.5 million during the year ended December 31, 2014. The $18.6 million increase in cash used in operating activities between the years ended December 31, 2015 and 2014 was primarily associated with the increase in net loss of $35.4 million, which was affected by our voluntary hold on the sale and implanting of all Sientra devices manufactured by Silimed since October 9, 2015 , offset by a decrease in cash outflows from operating assets and liabilities resulting from a decrease in inventory purchases and timing of accounts payable payments. Cash used in investing activities Net cash used in investing activities was $1.1 million during the year ended December 31, 2015 as compared to $0.4 million during the year ended December 31, 2014. The increase in cash used in investing activities of $0.7 million between the years ended December 31, 2015 and 2014 was primarily due to an increase in property and equipment purchases. Cash provided by financing activities Net cash provided by financing activities was $35.4 million during the year ended December 31, 2015 as compared to $87.0 million during the year ended December 31, 2014. The decrease in cash provided by financing activities of $51.6 million between the years ended December 31, 2015 and 2014 was primarily the result of the decrease in cash proceeds from the issuance of our common stock, net of the underwriters discount in the IPO of $80.2 million during the year ended December 31, 2014, in comparison to the cash proceeds from the issuance of our common stock, net of the underwriters discount in the follow-on offering of $62.0 million during the year ended December 31, 2015, and further offset by the repayment of long-term debt of $26.6 million during the year ended December 31, 2015. Our liquidity position and capital requirements are subject to a number of factors. For example, our cash inflow and outflow may be impacted by the following: · · · · · · · our continued ability to rely on Silimed to manufacture and supply our silicone gel breast implants, tissue expanders and other products or the timing and availability of alternative manufacturing sources ; net sales generated by our Breast Products and any other future products that we may develop and commercialize; costs associated with expanding our sales force and marketing programs; cost associated with developing and commercializing our proposed products or technologies; cost of obtaining and maintaining regulatory clearance or approval for our current or future products; cost of ongoing compliance with regulatory requirements; expenses we incur in connection with potential litigation or governmental investigations; 64 Table of Contents · · anticipated or unanticipated capital expenditures; and unanticipated G&A expenses. Our primary short ‑term capital needs, which are subject to change, include expenditures related to: · · cost of ongoing compliance with recent regulatory inquiries involving Silimed; costs associated with our own review and testing at Silimed’s manufacturing facilities and of our own inventory; · expenses we incur in connection with defending against the lawsuits filed against us alleging violations of the Exchange Act and the Securities Act in connection with allegedly false and misleading statements concerning Sientra’s business, operations, and prospects; · · · · support of our sales and marketing efforts related to our current and future products; new product acquisition and development efforts; facilities expansion needs ; and investment in inventory required to meet customer demands . Although we believe the foregoing items reflect our most likely uses of cash in the short-term, we cannot predict with certainty all of our particular short-term cash uses or the timing or amount of cash used. If cash generated from operations is insufficient to satisfy our working capital and capital expenditure requirements, we may be required to sell additional equity or debt securities or obtain additional credit facilities. Additional capital, if needed, may not be available on satisfactory terms, if at all. Furthermore, any additional equity financing may be dilutive to stockholders, and debt financing, if available, may include restrictive covenants. For a discussion of other factors that may impact our future liquidity and capital funding requirements, see “Risk Factors — Risks Related to Our Financial Results.” Indebtedness Term Loan Agreement On January 17, 2013, we entered into a Loan and Security Agreement with Oxford, which was amended and restated on June 30, 2014, or the Amended Term Loan Agreement. In connection with the Amended Term Loan Agreement, we issued to Oxford (i) seven ‑year warrants in January 2013 to purchase shares of our common stock with a value equal to 3.0% of the tranche A, B and C term loans amounts and (ii) seven ‑year warrants in June 2014 to purchase shares of our common stock with a value equal to 2.5% of the tranche D term loan amount. The warrants have an exercise price per share of $14.671. On October 27, 2015, Oxford issued a notice to the Company indicating that, in connection with the recent events involving Silimed and the Company, certain events of default have occurred and continue to exist under the Amended Term Loan Agreement. On October 28, 2015, we repaid all principal, interest, other amounts and obligations owed to Oxford under the term loans for a total of $24.5 million, following which the Company has no outstanding debt obligations. 65 Table of Contents Contractual Obligations and Commitments The following table summarizes our contractual obligations and commitments as of December 31, 2015 : Payments Due by Period Total Less than 1 year 1 - 3 years (in thousands) 3 - 5 years More than 5 years $ $ 2,039 $ 2,039 $ 503 $ 503 $ 1,028 $ 1,028 $ 508 $ 508 $ — — Operating lease obligations Total contractual obligations Off ‑‑Balance Sheet Arrangements During the periods presented we did not have, nor do we currently have, any off ‑balance sheet arrangements as defined under SEC rules. Item 7A.  Quantitative and Qualitative Disclosure s about Market Risks We are exposed to market risks in the ordinary course of our business. Our cash and cash equivalents include cash in readily available checking accounts. Item 8.  Financial Statements and Supplementary Dat a The financial statements required to be filed pursuant to this Item 8 are appended to this report beginning on page F ‑1. An index of those financial statements is included in Part IV, Item 15 below. Item 9.  Changes in and Disagreements with Accountant s on Accounting and Financial Disclosure PricewaterhouseCoopers LLP, or PwC, was previously our independent auditors since 2007. On December 13, 2013, we dismissed PwC and KPMG LLP was engaged as our independent auditors. The decision to change our independent auditors was approved by our board of directors. During the years ended December 31, 2011 and 2012 and the subsequent interim period through December 13, 2013, there were no (i) disagreements with PwC on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures which disagreements if not resolved to PwC’s satisfaction would have caused them to make reference thereto in their reports on the financial statements for such years, or (ii) reportable events as defined in Item 304(a)(1) (v) of Regulation S ‑K, except as described below. PwC did not issue any audit reports for the years ended December 31, 2012 and 2013. During October 2013, PwC notified us that it was in disagreement with our revenue recognition policies relating to the timing of revenue recognition given our terms and conditions and practices regarding returns. The subject matter of this disagreement was not discussed between our board of directors and PwC prior to PwC’s dismissal. We authorized PwC to respond fully to the inquiries of KPMG LLP concerning the subject matter of this disagreement. We requested PwC to provide us with a letter addressed to the SEC stating whether or not PwC agrees with the above disclosures. A copy of PwC’s letter, dated September 1, 2015 , is attached as Exhibit 16.1 to the registration statement on Form S ‑1 filed with the SEC on September 3, 2015 . KPMG LLP audited our financial statements for the years ended December 31, 2012 and 2013 and the audit reports of KPMG LLP for such years did not contain an adverse opinion or a disclaimer of opinion, nor were they qualified or modified as to uncertainty, audit scope or accounting principles. During the two fiscal years ended December 31, 2012 and through the subsequent interim period prior to KPMG LLP becoming the Company’s independent auditors, the Company did not consult with KPMG LLP on either (i) the application of accounting principles to a specified transaction, either completed or proposed, (ii) the type of audit opinion that may be rendered on the Company’s financial statements; or (iii) any matter that was either the subject of a disagreement, as defined in Item 304(a)(1)(iv) of Regulation S ‑K, or a reportable event. We are unable to quantify the impact of the matters subject to the disagreement and cannot state what the effect on our financial statements would have been as an evaluation of such matters was not completed prior to the dismissal of our former independent auditors. 66 Table of Contents Item 9A.  Controls and Procedure s Evaluation of Disclosure Controls and Procedures Our management, with the participation of our principal executive officer and principal financial officer, has evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Annual Report on Form 10 ‑K. The term “disclosure controls and procedures,” as defined in Rules 13a ‑15(e) and 15d ‑15(e) under the Exchange Act means control and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Based on the evaluation of our disclosure controls and procedures as of December 31, 2015 , our principal executive officer and principal financial officer have concluded that as of such date, our disclosure controls and procedures were effective. Management’s Annual Report on Internal Control over Financial Reporting Our management is responsible for establishing and maintaining adequate internal control over financial reporting as such term is defined in Exchange Act Rule 13a-15(f). Internal control over financial reporting is a process designed under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America. As of December 31, 2015, our management assessed the effectiveness of our internal control over financial reporting using the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control- Integrated Framework , or the 2013 Framework. Based on this assessment, our management concluded that, as of December 31, 2015, our internal control over financial reporting was effective based on those criteria . Inherent Limitations of Internal Controls Our management, including our principal executive officer and principal financial officer , does not expect that our disclosure controls and procedures or our internal controls will prevent or detect all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision ‑making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost ‑effective control system, misstatements due to error or fraud may occur and not be detected. Changes in Internal Control over Financial Reporting There were no changes in our internal control over financial reporting during our most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. Item 9B.  Other Informatio n On March 7, 2016, our board of directors adopted the Sientra, Inc. Inducement Plan, or the Inducement Plan, pursuant to which we reserved 180,000 shares of our common stock for issuance under the Inducement Plan. The Inducement Plan provides for the grant of stock options and restricted stock unit awards. The only persons eligible to 67 Table of Contents receive grants of stock awards under the Inducement Plan are individuals who satisfy the standards for inducement grants under NASDAQ Marketplace Rule 5635(c)(4) and the related guidance under NASDAQ IM 5635-1. A person who previously served as an employee or director of the Company will not be eligible to receive stock awards under the Inducement Plan, other than following a bona fide period of non-employment. Our board of directors or a duly authorized committee has the authority to administer the Inducement Plan, provided however, that the grant of stock awards under the Inducement Plan must be granted either by our independent compensation committee or a majority of our independent directors within the meaning of Rule 5605(a) (2) of the NASDAQ Listing Rules. The foregoing description of the terms of the Inducement Plan is qualified in its entirety by reference to the Inducement Plan and forms of award agreements thereunder, which is filed with this Annual Report on Form 10- K as exhibit 10.20 and incorporated herein by reference. 68 Table of Contents Item 10.  Directors, Executive Officers, and Corporate Governanc e PART II I Incorporated by reference from the information in our Proxy Statement for our 2016 Annual Meeting of Stockholders, which we will file with the SEC within 120 days of the end of the fiscal year to which this Annual Report on Form 10 ‑K relates. Item 11.  Executive Compensatio n Incorporated by reference from the information in our Proxy Statement for our 2016 Annual Meeting of Stockholders, which we will file with the SEC within 120 days of the end of the fiscal year to which this Annual Report on Form 10 ‑K relates. Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters Incorporated by reference from the information in our Proxy Statement for our 2016 Annual Meeting of Stockholders, which we will file with the SEC within 120 days of the end of the fiscal year to which this Annual Report on Form 10 ‑K relates. Item 13.  Certain Relationships and Related Transaction s and Director Independence Incorporated by reference from the information in our Proxy Statement for our 2016 Annual Meeting of Stockholders, which we will file with the SEC within 120 days of the end of the fiscal year to which this Annual Report on Form 10 ‑K relates. Item 14.  Principal Accountant Fees and Service s Incorporated by reference from the information in our Proxy Statement for our 2016 Annual Meeting of Stockholders, which we will file with the SEC within 120 days of the end of the fiscal year to which this Annual Report on Form 10 ‑K relates. 69 Table of Contents PART I V Item 15.  Exhibits, Financial Statements and Schedule (a)(1) Financial Statements. The response to this portion of Item 15 is set forth under Item 8 above. (a)(2) Financial Statement Schedule. All schedules have been omitted because they are not required or because the required information is given in the Financial Statements or Notes thereto set forth under Item 8 above. (a)(3) Exhibits. See the Exhibit Index immediately following the signature page of this Annual Report on Form 10 ‑K. The exhibits listed in the Exhibit Index below are filed or incorporated by reference as part of this Annual Report on Form 10 ‑K. 70 Table of Contents Sientra, Inc. INDEX TO FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULE Report of Independent Registered Public Accounting Firm Balance Sheets Statements of Operations Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit) Statements of Cash Flows Notes to Financial Statements Schedule II—Valuation and Qualifying Accounts 71 Pages 72 73 74 75 76 77 89 Table of Contents Report of Independent Registered Public Accounting Fir m The Board of Directors and Stockholders Sientra, Inc. : We have audited the accompanying balance sheets of Sientra, Inc. (the Company) as of December 31, 2015 and 2014, and the related statements of operations, convertible preferred stock and stockholders’ equity (deficit), and cash flows for each of the years in the three ‑year period ended December 31, 2015. In connection with our audits of the financial statements, we also have audited the related financial statement schedule II – valuation and qualifying accounts. These financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial statement schedule referred to above present fairly, in all material respects, the financial position of Sientra, Inc. as of December 31, 2015 and 2014, and the results of its operations and its cash flows for each of the years in the three ‑year period ended December 31, 2015, in conformity with U.S. generally accepted accounting principles. Woodland Hills, California March 1 0 , 201 6 (signed) KPMG LLP 72 Table of Contents S ientra , I nc . Balance Sheets ( i n thousands, except per share data ) Assets Current assets: Cash and cash equivalents Accounts receivable, net of allowances of $1,116 and $10,330 at December 31, 2015 and 2014, respectively Inventories, net Prepaid expenses and other current assets Total current assets Property and equipment, net Goodwill Other intangible assets, net Other assets Total assets Liabilities and Stockholders’ Equity Current liabilities: Current portion of long-term debt Accounts payable Accrued and other current liabilities Customer deposits Total current liabilities Long-term debt, net of current portion Warranty reserve and other long-term liabilities Total liabilities Commitments and contingencies (Note 8) Stockholders’ equity: December 31, 2015 2014 $ 112,801 $ 96,729 4,249 20,602 1,473 139,125 1,404 — 53 223 140,805 $ — $ 4,069 6,959 9,488 20,516 — 1,418 21,934 5,198 20,174 1,782 123,883 555 14,278 114 248 139,078 3,757 2,589 5,772 8,614 20,732 21,671 1,036 43,439 $ $ Preferred stock, $0.01 par value – Authorized 10,000,000 shares; none issued or outstanding Common stock, $0.01 par value — Authorized 200,000,000 shares; issued 18,066,143 and 14,985,704 and outstanding 17,993,416 and 14,912,977 shares at December 31, 2015 and 2014, respectively Additional paid-in capital Treasury stock, at cost (72,727 shares at December 31, 2015 and 2014) Accumulated deficit Total stockholders’ equity Total liabilities and stockholders’ equity — — 180 294,227 (260) (175,276) 118,871 140,805 $ 150 229,795 (260) (134,046) 95,639 139,078 $ See accompanying notes to financial statements. 73      Table of Contents Net sales Cost of goods sold Gross profit Operating expenses: Sales and marketing Research and development General and administrative Goodwill impairment Total operating expenses Loss from operations Other (expense) income, net: Interest income Interest expense Other income (expense), net Sientra, Inc. Statements of Operations (in thousands, except per share data ) Year Ended December 31, 2015 2014 2013 $ 38,106 $ 10,654 27,452 44,733 $ 11,500 33,233 35,171 8,592 26,579 22,229 4,479 18,078 — 44,786 (18,207) — (872) (46) (918) (19,125) — (19,125) 25,762 7,199 18,738 14,278 65,977 (38,525) 32 (3,097) 360 (2,705) (41,230) — (41,230) $ 23,599 4,707 10,712 — 39,018 (5,785) — (2,172) 2,146 (26) (5,811) — (5,811) $ (2.61) $ (2.28) $ (82.25) Total other (expense) income, net Loss before income taxes Income taxes Net loss Basic and diluted net loss per share attributable to common stockholders Weighted average outstanding common shares used for net loss per share attributable to common stockholders: $ $ Basic and diluted 15,770,972 2,545,371 232,512 See accompanying notes to f inancial statements. 74           Table of Contents Sientra, Inc. Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit ) (in thousands, except per share data) Convertible preferred stock Common stock Treasury stock Shares Amount Shares Amount Shares Amount Additional paid-in capital Accumulated deficit Total stockholders’ equity (deficit) 24,593,087 $ 150,456 276,854 $ 3 — — — — — — — — 3,025 — — — — — — — $ — — 72,727 — — — — (260) — — $ 1,467 $ (109,110) $ 10 — 342 — — — — (19,125) (107,640) 10 (260) 342 (19,125) 24,593,087 $ 150,456 279,879 $ 3 72,727 $ (260) 1,819 $ (128,235) $ (126,673) (24,593,087) (150,456) 8,942,925 89 — — 150,367 — 150,456 — — — — — — — — 5,750,000 12,900 — — 58 — — — — — — — — — — — 76,977 38 594 — — — — (5,811) 77,035 38 594 (5,811) — $ — 14,985,704 $ 150 72,727 $ (260) 229,795 $ (134,046) $ 95,639 — — — — — — 3,000,000 — — — — — 36,189 44,250 — 30 — — — — — — — — — — — — — — 61,367 2,382 119 — — — 61,397 2,382 119 564 — — (41,230) 564 (41,230) — $ — 18,066,143 $ 180 72,727 $ (260) $ 294,227 $ (175,276) $ 118,871 Balances at December 31, 2012 Stock option exercises Repurchased common shares Employee stock-based compensation expense Net loss Balances at December 31, 2013 Conversion of convertible preferred stock to common stock Proceeds from IPO, net of costs Stock option exercises Employee stock-based compensation expense Net loss Balances at December 31, 2014 Proceeds from follow- on offering, net of costs Employee stock-based compensation expense Stock option exercises Employee stock purchase program (ESPP) Net loss Balances at December 31, 2015 See accompanying notes to financial statements. 75 Table of Contents Sientra, Inc. Statements of Cash Flow s (in thousands) Cash flows from operating activities: Net loss Adjustments to reconcile net loss to net cash (used in) provided by operating activities: 2015 Year Ended December 31, 2014 2013 $ (41,230) $ (5,811) $ (19,125) Goodwill impairment Depreciation and amortization Provision for doubtful accounts Provision for warranties Provision for inventory Change in fair value of warrants Non-cash interest expense Stock-based compensation expense Changes in assets and liabilities: Accounts receivable Prepaid expenses, other current assets and other assets Inventories Accounts payable Accrued and other liabilities Customer deposits Net cash (used in) provided by operating activities Cash flows from investing activities: Purchase of property and equipment Contingent payment related to Silimed acquisition Net cash used in investing activities Cash flows from financing activities: Proceeds from exercise of stock options Repurchase of common stock Proceeds from issuance of common stock, net of underwriters discount Proceeds from issuance of common stock under employee stock purchase plan Deferred equity issuance costs, IPO Deferred equity issuance costs, follow-on offering Proceeds from issuance of long-term debt Repayment of long-term debt Deferred financing costs Net cash provided by financing activities Net increase (decrease) in cash and cash equivalents 14,278 318 233 385 469 (360) 1,386 2,382 715 147 (898) 1,546 1,571 874 (18,184) (1,128) — (1,128) 119 — 62,040 564 (71) (643) — (26,625) — 35,384 16,072 — 275 39 447 — 220 490 594 875 (864) 1,359 (2,266) 1,385 3,707 450 (439) — (439) 38 — 80,213 — (3,107) — 10,000 — (148) 86,996 87,007 Cash and cash equivalents at: Beginning of period End of period Supplemental disclosure of cash flow information: Interest paid Supplemental disclosure of non-cash investing and financing activities: Accrued equity issuance costs Property and equipment in accounts payable $ $ 96,729 112,801 $ 9,722 96,729 $ 1,884 $ 1,577 $ — 22 71 44 See accompanying notes to financial statements. 76 — 280 107 392 — 46 179 342 (2,868) 195 (10,852) 1,904 (70) 3,593 (25,877) (71) (18,000) (18,071) 10 (260) — — — — 15,000 — (288) 14,462 (29,486) 39,208 9,722 641 — —                  Table of Contents S ientra , I nc . Notes to Financial Statements ( i n thousands, except per share data ) 1) Formation and Business of the Company (a) Formation Sientra, Inc., or the Company, was incorporated in the State of Delaware on August 29, 2003 under the name Juliet Medical, Inc. and subsequently changed its name to Sientra, Inc. in April 2007. The Company acquired substantially all the assets of Silimed, Inc., or Silimed, on April 4, 2007. The purpose of the acquisition was to acquire the rights to the silicone breast implant clinical trials. Following this acquisition, the Company focused on completing the clinical trials to gain Food and Drug Administration, or FDA, approval to offer its silicone gel breast implants in the United States. In March 2012, Sientra announced it had received approval from the FDA for its portfolio of silicone gel breast implants, and in the second quarter of 2012 the Company began commercialization efforts to sell its products in the United States. The Company, based in Santa Barbara, California, is a medical aesthetics company that focuses on serving board-certified plastic surgeons and offers a portfolio of silicone shaped and round breast implants, tissue expanders, and body contouring products. (b) Reverse Stock Split On October 10, 2014, the board of directors and stockholders approved an amendment to the Company’s fourth amended and restated certificate of incorporation, which was filed on October 17, 2014, which effected a 2.75 -to-1 reverse stock split of the Company’s issued and outstanding shares of common stock. The par value of the common stock was not adjusted as a result of the reverse stock split. All issued and outstanding shares of common stock, stock options and warrants and the related per share amounts contained in the Company’s financial statements have been retroactively adjusted to reflect this reverse stock split for all periods presented. Also, as a result of the reverse stock split of the common stock, the conversion ratios for all of the Company’s convertible preferred stock have been adjusted such that the preferred stock are now convertible into shares of common stock at a conversion rate of 2.75 -to-1 instead of 1 -to-1. The number of issued and outstanding shares of preferred stock and their related per share amounts have not been affected by the reverse stock split and therefore have not been adjusted in the Company’s financial statements. However, to the extent that the convertible preferred stock are presented on an as converted to common stock basis, such share and per share amounts contained in the Company’s financial statements have been retroactively adjusted to reflect this reverse stock split for all periods presented. (c) Initial Public Offering On November 3, 2014, the Company completed an initial public offering, or IPO, whereby it sold a total of 5,750,000 shares of common stock at $15.00 per share inclusive of 750,000 shares sold to underwriters for the exercise of their option to purchase additional shares. The Company received net proceeds from the IPO of approximately $77,035 , after deducting underwriting discounts and commissions and offering expenses of approximately $9,215 . These expenses were recorded against the proceeds received from the IPO. The interest-only period for the tranche D term loan (see Note 4) was extended from August 1, 2015 to August 1, 2016 as a result of having raised at least $50,000 in gross proceeds in the IPO and the completion of the IPO before June 30, 2015. The outstanding shares of convertible preferred stock were converted on a 2.75 -to-1 basis into shares of common stock concurrent with the closing of the IPO. All of the outstanding shares of Series A, Series B and Series C preferred stock converted into 8,942,925 shares of common stock. Following the closing of the IPO, there were no shares of preferred stock outstanding. 77 Table of Contents (d) Follow-on Offering On September 23, 2015, the Company closed a follow-on public offering, whereby it sold 3,000,000 shares of its common stock, at a price to the public of $22.00 per share. The Company received net proceeds from the follow-on offering of approximately $61,397 , after deducting underwriting discounts and commissions of $3,960 and offering expenses of approximately $643 . (e) Regulatory Inquiries Regarding Products M anufactured by Silimed There have been recent regulatory inquiries related to medical devices manufactured by Silimed Industria de Implantes Ltda. (formerly, Silimed-Silicone e Instrumental Medico-Cirugio e Hospitalar Ltda.), or Silimed, the Company’s contract manufacturer. On September 23, 2015, the Medicines and Healthcare Products Regulatory Agency, or MHRA, an executive agency of the United Kingdom, or U.K., issued a press release announcing the suspension of sales and implanting in the U.K. of all medical devices manufactured by Silimed following the suspension of the CE certificate of these products issued by TUV SUD, Silimed’s notified body under European Union, or EU, regulation. The suspension of Silimed’s CE certificate by TUV SUD followed TUV SUD’s inspection at Silimed’s manufacturing facilities in Brazil, relating to particles on Silimed breast products . Breast implants have stringent standards for manufacturing and robust quality systems, but there is no specific or defined standard for particles on breast implants. MHRA noted that no risks to patient health have been identified in connection with implanting Silimed products, and, accordingly, there is no need to adopt any procedure or action for those patients who have received them. On October 2, 2015, the Brazilian regulatory agency ANVISA and the Department of the Secretary of State of the State of Rio de Janeiro announced that while they continue to review the technical compliance related to GMP of Silimed’s manufacturing facility, and as a precautionary measure , they temporarily suspended the manufacturing and shipment of all medical devices made by Silimed, including products manufactured for Sientra. ANVISA reiterated that no risks to patient health have been identified in connection with implanting Silimed products, and, accordingly, there is no need to adopt any procedure or action for those patients who have received them. Furthermore, ANVISA also indicated that, based on their contact to date with foreign regulatory authorities, there have been no reports of adverse events related to the use of Silimed products. On October 9, 2015, the Company voluntarily placed a hold on the sale of all Sientra devices manufactured by Silimed and recommended that plastic surgeons discontinue implanting the devices until further notice. The Company had ongoing discussions with the FDA regarding European and Brazilian regulatory inquiries into Silimed products, and conduct ed its own review of the matter with the assistance of independent experts in quality management systems, GMP and data-based risk assessment. The FDA also reiterated that no reports of adverse events and no risks to patient health had been identified in connection with this issue . On January 27, 2016, after completing an analysis and risk assessment, ANVISA announced their authoriz ation of Silimed to resume the commercialization and use of its previously manufactured products. ANVISA concluded there was no evidence to prove that the presence of surface particles on the silicone implants represented risks which are additional to the ones inherent in the product. However, Silimed continues to be suspended from manufacturing and commercializing new batches of implants until an inspection is performed to reassess the fulfillment of its GMP compliance . On March 1, 2016, after the completion of extensive independent, third-party testing and analyses of its devices manufactured by Silimed, the Company lifted the temporary hold on the sale of such devices. The Company also sent a letter to Plastic Surgeons informing them of the Company’s market re-entry plans. The conclusive results of the Company’s testing indicate no anticipated significant safety concerns with the use of its products, including its breast implants, consistent with their approval status since 2012. 78 Table of Contents (2) Summary of Significant Accounting Policies (a) Basis of Presentation and Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, or GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Assets and liabilities which are subject to significant judgment and use of estimates include the allowance for doubtful accounts, sales return reserves, provision for warranties, valuation of inventories, recoverability of long-lived assets, valuation allowances with respect to deferred tax assets, useful lives associated with property and equipment and finite lived intangible assets, and the valuation and assumptions underlying stock-based compensation and other equity instruments. On an ongoing basis, the Company evaluates its estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. In addition, the Company engages the assistance of valuation specialists in concluding on fair value measurements in connection with stock-based compensation and other equity instruments. (b) Liquidity Since inception, the Company has incurred net losses. During the years ended December 31, 2015, 2014, and 2013 the Company incurred net losses of $41,230 , $5,811 , and $19,125 , respectively. The Company used $18,184 of cash in operations for the year ended December 31, 2015, provided $450 cash from operations during the year ended December 31, 2014 and used $25,877 of cash in operations during the year ended December 31, 2013. At December 31, 2015 and 2014 the Company had an accumulated deficit of $175,276 and $134,046 , respectively. At December 31, 2015, the Company had cash and cash equivalents of $112,801 . The accompanying financial statements have been prepared on a going concern basis, which implies the Company will continue to realize its assets and discharge its liabilities in the normal course of business. Silimed is the Company’s sole source manufacturer of silicone gel breast implants, tissue expanders and other products. The continuation of the Company as a going concern is dependent upon many factors including the satisfactory resolution of the regulatory inquiries of Silimed’s medical devices, Silimed’s ability to resume the manufacturing of the Company’s medical devices, the availability of alternative manufacturing sources, and the resumption of the sale of the Company’s products. The Company’s ability to continue to meet its obligations and to achieve its business objectives is dependent upon, amongst other things, generating sufficient revenues. The Company believes that it has the ability to continue as a going concern for at least 12 months. These financial statements do not include any adjustments to the recoverability and classification of recorded asset amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern. (c) Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents consist primarily of checking accounts. (d) Concentration of Credit and Supplier Risks Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents. The Company’s cash and cash equivalents are deposited in demand accounts at a financial institution that management believes is creditworthy. The Company is exposed to credit risk in the event of default by this financial institution for cash and cash equivalents in excess of amounts insured by the Federal Deposit Insurance Corporation, or FDIC. Management believes that the Company’s investments in cash and cash equivalents are financially sound and have minimal credit risk and the Company has not experienced any losses on its deposits of cash and cash equivalents. The Company currently purchases all of its Breast Products from one supplier under an exclusivity contract. The supplier and its production facility are located in Brazil. The Company is exposed to risks of foreign regulations in Brazil that could hinder the Company’s ability to import goods, as well as halts or limitations in productions due to events outside of the Company’s control occurring at the production facility. This could result in the Company not being able to acquire the inventory needed to meet customer demand, which would result in possible loss of sales and affect operating results adversely. 79 Table of Contents Several recent events have occurred which have affected the Company’s ability to rely on Silimed as their source for silicone gel breast implants, tissue expanders and other products in the short and long term, including the suspension of Silimed’s CE certificate by TUV SUD, Silimed’s notified body under EU regulation, relating to particles on Silimed breast products, followed by Brazilian regulatory inquiries and a temporary suspension by the Brazilian regulatory agency ANVISA and the Department of the Secretary of State of Rio de Janeiro of the manufacturing and shipment of all medical devices made by Silimed, including products manufactured for Sientra. As a result of this suspension, between October 9, 2015 and March 1, 2016, the Company voluntarily placed a temporary hold on the sale of all Sientra devices manufactured by Silimed and recommended that plastic surgeons discontinue implanting the devices. As of March 1, 2016, after ongoing discussions with the FDA and the Company’s own review of the matter with the assistance of independent experts in quality management systems, GMP and data- based risk assessment, the Company lifted the temporary hold on sales and also sent a letter to plastic surgeons informing them of the Company’s market re-entry plans. In addition, on October 22, 2015, there was a fire in the manufacturing building where Silimed primarily manufactures Sientra’s breast implants. The Company is working with Silimed to seek clarity as to the near and long-term capabilities of Silimed’s manufacturing operations, including the status of equipment that is used to manufacture breast implants and the potential feasibility, production capacity and timing related to Silimed’s ability to manufacture the Company’s breast implants. (e) Fair Value of Financial Instruments The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued liabilities, and customer deposits are reasonable estimates of their fair value because of the short maturity of these items. The fair value of the common stock warrant liability is discussed in Note 2(f). As of December 31, 2015, the Company had no outstanding long-term debt. (f) Fair Value Measurements Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair value hierarchy, of which the first two are considered observable and the last is considered unobservable: · · · Level 1 — Quoted prices in active markets for identical assets or liabilities. Level 2 — Observable inputs (other than Level 1 quoted prices) such as quoted prices in active markets for similar assets or liabilities, quoted prices in markets that are not active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data. Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques. The Company’s common stock warrant liabilities are carried at fair value determined according to the fair value hierarchy described above. The Company has utilized an option pricing valuation model to determine the fair value of its outstanding common stock warrant liabilities. The inputs to the model include fair value of the common stock related to the warrant, exercise price of the warrant, expected term, expected volatility, risk-free interest rate and dividend yield. Prior to the IPO, the Company determined the fair value per share of the underlying common stock by taking into consideration its most recent sale of its convertible preferred stock as well as additional factors that the Company deems relevant. Subsequent to the IPO, the warrants are valued using the fair value of common stock as of the measurement date. The Company historically has been a private company and lacks company-specific historical and implied volatility information of its stock. Therefore, it estimates its expected stock volatility based on the historical volatility of publicly traded peer companies for a term equal to the remaining contractual term of the warrants. The risk-free interest rate is determined by reference to the U.S. Treasury yield curve for time periods approximately equal to the remaining contractual term of the warrants. The Company has estimated a 0% dividend yield based on the expected dividend yield and the fact 80 Table of Contents that the Company has never paid or declared dividends. As several significant inputs are not observable, the overall fair value measurement of the warrants is classified as Level 3. The following tables present information about the Company’s liabilities that are measured at fair value on a recurring basis as of December 31, 2015 and 2014 and indicate the level of the fair value hierarchy utilized to determine such fair value: Liabilities: Liability for common stock warrants Liabilities: Liability for common stock warrants Fair Value Measurements as of December 31, 2015 Using: Level 1 Level 2 Level 3 Total — — 60 60 Fair Value Measurements as of December 31, 2014 Using: Level 1 Level 2 Level 3 Total — — 420 420 $ $ The following table provides a rollforward of the aggregate fair values of the Company’s common stock warrants for which fair value is determined by Level 3 inputs: Balance, January 1, 2014 Fair value of warrants upon issuance during 2014 Increase in fair value through December 31, 2014 Balance, December 31, 2014 Decrease in fair value through December 31, 2015 Balance, December 31, 2015 $ $ 90 110 220 420 (360) 60 The company recognized changes in the fair value of these warrants in other (expense) income, net in the statement of operations. (g) Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is computed using the straight ‑line method over the estimated useful life of the asset; generally three years. Leasehold improvements are depreciated over the shorter of the lease term or the estimated useful life of the related asset. Upon retirement or sale of an asset, the cost and related accumulated depreciation or amortization are removed from the balance sheet and any resulting gain or loss is reflected in operations in the period realized. Maintenance and repairs are charged to operations as incurred. (h) Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the fair value of net assets of purchased businesses. Goodwill is not amortized, but instead subject to impairment tests on at least an annual basis and whenever circumstances suggest that goodwill may be impaired. The Company’s annual test for impairment is performed as of October 1 of each fiscal year. The Company makes a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two ‑step goodwill impairment test. If the Company concludes that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, it is not required to perform the two ‑step impairment test for that reporting unit. Under the first step of the test, the Company is required to compare the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not considered impaired and the second step of the test is not performed. If the results of the first step of the impairment test indicate that the fair value of a reporting unit does not exceed its carrying amount, then the second step of the test is required. The second step of the test compares the implied fair value of the reporting unit goodwill with the 81                                                     Table of Contents carrying amount of that goodwill. The impairment loss is measured by the excess of the carrying amount of the reporting unit goodwill over the implied fair value of that goodwill. Management evaluates the Company as a single reporting unit for business and operating purposes as all of the Company’s revenue streams are generated by the same underlying products via sales in the United States of America. In addition, the majority of the Company’s costs are, by their nature, shared costs that are not specifically identifiable to a geography or product line, but relate to all products. As a result, there is a high degree of interdependency among the Company’s net sales and cash flows for the entity and identifiable cash flows for a reporting unit separate from the entity are not meaningful. Judgments about the recoverability of purchased finite ‑lived intangible assets are made whenever events or changes in circumstance indicate that impairment may exist. Each fiscal year the Company evaluates the estimated remaining useful lives of purchased intangible assets and whether events or changes in circumstance warrant a revision to the remaining periods of amortization. Recoverability of finite ‑lived intangible assets is measured by comparison of the carrying amount of the asset to the future undiscounted cash flows the asset is expected to generate. The intangible asset is amortized to the statement of operations based on estimated cash flows generated from the intangible over its estimated life. (i) Impairment of Long ‑‑Lived Assets The Company’s management routinely considers whether indicators of impairment of long ‑lived assets are present. If such indicators are present, management determines whether the sum of the estimated undiscounted cash flows attributable to the assets in question is less than their carrying value. If less, the Company will recognize an impairment loss based on the excess of the carrying amount of the assets over their respective fair values. Fair value is determined by discounted future cash flows, appraisals or other methods. If the assets determined to be impaired are to be held and used, the Company will recognize an impairment charge to the extent the present value of anticipated net cash flows attributable to the asset are less than the asset’s carrying value. The fair value of the asset will then become the asset’s new carrying value. There have been no impairments of long ‑lived assets recorded during the years ended December 31, 2015, 2014 and 2013. The Company may record impairment losses in future periods if factors influencing its estimates change. (j) Revenue Recognition The Company sells its product directly to customers in markets where it has regulatory approval. The Company offers a six-month return policy and recognizes revenue net of sales discounts and returns in accordance with the Financial Accounting Standards Board, or FASB, Accounting Standards Codification 605, Revenue Recognition, or ASC 605. ASC 605 requires that six basic criteria must be met before revenue can be recognized when a right of return exists: · · · · · · the seller’s price to the buyer is substantially fixed or determinable at the date of sale; the buyer has paid the seller, or the buyer is obligated to pay the seller and the obligation is not contingent on resale of the product; the buyer’s obligation to the seller would not be changed in the event of theft or physical destruction or damage of the product; the buyer acquiring the product for resale has economic substance apart from that provided by the seller; the seller does not have significant obligations for future performance to directly bring about resale of the product by the buyer; and the amount of future returns can be reasonably estimated. Appropriate reserves are established for anticipated sales returns based on historical experience, recent gross sales and any notification of pending returns. The Company recognizes revenue when title to the product and risk of loss transfer to customers, provided there are no remaining performance obligations required of the Company or any written matters requiring customer acceptance. The Company allows for the return of product from customers within six months after the 82 Table of Contents original sale and records estimated sales returns as a reduction of sales in the same period revenue is recognized. Sales return provisions are calculated based upon historical experience with actual returns. Actual sales returns in any future period are inherently uncertain and thus may differ from the estimates. If actual sales returns differ significantly from the estimates, an adjustment to revenue in the current or subsequent period would be recorded. The Company has established an allowance for sales returns of $660 and $10,018 as of December 31, 2015 and 2014, respectively, recorded net against accounts receivable in the balance sheet. A portion of the Company’s revenue is generated from the sale of consigned inventory of breast implants maintained at doctor, hospital, and clinic locations. The customer is contractually obligated to maintain a specific level of inventory and to notify the Company upon use. For these products, revenue is recognized at the time the Company is notified by the customer that the product has been implanted. Notification is usually through the replenishing of the inventory and the Company periodically reviews consignment inventories to confirm accuracy of customer reporting. FDA regulations require tracking the sales of all implanted breast implant products. Shipping and handling charges are largely provided to customers free of charge. The associated costs are viewed as part of the Company’s marketing programs and are recorded as a component of sales and marketing expense in the statement of operations. For the years ended 2015, 2014 and 2013 these costs amounted to $1,115 , $1,305 and $1,021 , respectively. In other cases, shipping and handling charges may be invoiced to customers based on the amount of products sold. In such cases, shipping and handling fees collected are recorded as revenue and the related expense as a component of cost of goods sold. (k) Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for doubtful accounts for estimated losses resulting from the inability to collect from some of its customers. The allowances for doubtful accounts are based on the analysis of historical bad debts, customer credit ‑worthiness, past transaction history with the customer, and current economic trends. If the financial condition of the Company’s customers were to deteriorate, adversely affecting their ability to make payments, additional allowances may be required. The Company has established an allowance for doubtful accounts of $456 and $312 as of December 31, 2015 and 2014, respectively. (l) Inventories and Cost of Goods Sold Inventories represent finished goods that are recorded at the lower of cost or market on a first ‑in, first ‑out basis, or FIFO. The Company periodically assesses the recoverability of all inventories to determine whether adjustments for impairment or obsolescence are required. The Company evaluates the remaining shelf life and other general obsolescence and impairment criteria in assessing the recoverability of the Company’s inventory. The Company recognizes the cost of inventory transferred to the customer in cost of goods sold when revenue is recognized. At December 31, 2015 and 2014, approximately $2,274 and $1,989 , respectively, of the Company’s inventory was held on consignment at doctors’ offices, clinics, and hospitals. The value and quantity at any one location is not significant. (m) Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized. The Company accounts for uncertain tax position in accordance with ASC 740 ‑10, Accounting for Uncertainty in Income Taxes . The Company assesses all material positions taken in any income tax return, including all significant uncertain positions, in all tax years that are still subject to assessment or challenge by relevant taxing authorities. Assessing 83 Table of Contents an uncertain tax position begins with the initial determination of the position’s sustainability and is measured at the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. As of each balance sheet date, unresolved uncertain tax positions must be reassessed, and the Company will determine whether (i) the factors underlying the sustainability assertion have changed and (ii) the amount of the recognized tax benefit is still appropriate. The recognition and measurement of tax benefits requires significant judgment. Judgments concerning the recognition and measurement of tax benefit might change as new information becomes available. (n) Research and Development Expenditures Research and development costs are charged to operating expenses as incurred. Research and development, or R&D, primarily consist of clinical expenses, regulatory expenses, product development, consulting services, outside research activities, quality control, and other costs associated with the development of the Company’s products and compliance with Good Clinical Practices, or GCP, requirements. R&D expenses also include related personnel and consultant compensation and stock-based compensation expense. (o) Advertising Expenses related to advertising are charged to sales and marketing expense as incurred. Advertising costs were $1,029 , $1,548 and $801 for fiscal years 2015, 2014 and 2013, respectively. (p) Stock ‑‑Based Compensation The Company applies the fair value provisions of ASC 718, Compensation — Stock Compensation , or ASC 718. ASC 718 requires the recognition of compensation expense, using a fair ‑value based method, for costs related to all employee share ‑based payments, including stock options, restricted stock units, and the employee stock purchase plan. ASC 718 requires companies to estimate the fair value of share ‑based payment awards on the date of grant using an option ‑pricing model. All option grants valued are being expensed on a straight ‑line basis over their vesting period. The Black ‑Scholes model requires the input of subjective assumptions, including the risk ‑free interest rate, expected dividend yield, expected volatility and expected term, among other inputs. These estimates involve inherent uncertainties and the application of management’s judgment. If factors change and different assumptions are used, our stock ‑based compensation expense could be materially different in the future. These assumptions are estimated as follows: · · · · Risk ‑free interest rate —The risk ‑free interest rate is based on the yields of U.S. Treasury securities with maturities similar to the expected term of the options for each option group. Dividend yield —We have never declared or paid any cash dividends and do not presently plan to pay cash dividends in the foreseeable future. Consequently, we used an expected dividend yield of zero. Expected volatility —As we do not have a significant trading history for our common stock, the expected stock price volatility for our common stock was estimated by taking the average of (i) the median historic price volatility and (ii) the median of the implied volatility averages, with a three ‑month lookback from the valuation date, for any trading options of industry peers based on daily price observations over a period equivalent to the expected term of the time to a liquidity event. We intend to continue to consistently apply this process using the same or similar public companies until a sufficient amount of historical information regarding the volatility of our own common stock share price becomes available. Expected term —The expected term represents the period that our stock ‑based awards are expected to be outstanding. 84 Table of Contents The following table presents the weighted ‑average assumptions used to estimate the fair value of options granted during the periods presented: Stock Options Expected term (in years) Expected volatility Risk-free interest rate Dividend yield 5.27 2015 to 6.08 45 % to 52 % 1.48 % to 1.92 % — Year Ended December 31, 5.77 2014 to 6.08 52 % to 57 % 1.71 % to 2.00 % — 2013 6.08 56% 1.00 % to 1.76 % — In addition to the assumptions used in the Black ‑Scholes option pricing model, the amount of stock ‑based compensation expense we recognize in our financial statements includes an estimate of stock option forfeitures. We estimate our forfeiture rate based on an analysis of our actual forfeitures and will continue to evaluate the appropriateness of the forfeiture rate based on actual forfeiture experience, analysis of employee turnover and other factors. Changes in the estimated forfeiture rate can have a significant impact on our stock ‑based compensation expense as the cumulative effect of adjusting the rate is recognized in the period the forfeiture estimate is changed. If a revised forfeiture rate is higher than the previously estimated forfeiture rate, an adjustment is made that will result in a decrease to the stock ‑based compensation expense recognized in the financial statements. If a revised forfeiture rate is lower than the previously estimated forfeiture rate, an adjustment is made that will result in an increase to the stock ‑based compensation expense recognized in our financial statements. The following table presents the weighted-average assumptions used to estimate the fair value of the stock purchase rights granted under the employee stock purchase plan: ESPP Expected term (in years) Expected volatility Risk-free interest rate Dividend yield (q) Product Warranties Year Ended December 31, 0.50 2015 to 42 % to 0.08 % to — 2.10 44 % 0.71 % 0.63 2014 to 43 % to 0.08 % to — 2.14 44 % 0.49 % The Company offers a limited warranty and a lifetime product replacement program for the Company’s silicone gel breast implants. Under the limited warranty program, the Company will reimburse patients for certain out-of-pocket costs related to revision surgeries performed within ten years from the date of implantation in a covered event. Under the lifetime product replacement program, the Company provides no-charge replacement breast implants under a covered event. The programs are available to all patients implanted with the Company’s silicone breast implants after April 1, 2012 and are subject to the terms, conditions, claim procedures, limitations and exclusions. Timely completion of a device tracking and warranty enrollment form by the patient’s Plastic Surgeon is required to activate the programs and for the patient to be able to receive benefits under either program. The following table provides a rollforward of the accrued warranties: Beginning balance Payments made during the period Changes in accrual related to warranties issued during the period Changes in accrual related to pre-existing warranties Ending balance 85 December 31, 2015 2014 $ $ 961 (14) 420 (35) 1,332 $ $ 515 (1) 509 (62) 961      Table of Contents (r) Deferred Equity Issuance Costs Deferred equity issuance costs, primarily consisting of legal, accounting and other direct fees and costs relating to the IPO and follow-on offering, were capitalized, as incurred, in other current assets prior to the completion of the IPO and follow-on offering. Upon completion of the IPO, $3,178 of issuance costs were capitalized, all of which were reclassified to additional- paid-in capital to offset the IPO proceeds for the year ending December 31, 2014. Upon completion of the follow-on offering, $643 of issuance costs were capitalized, all of which were reclassified to additional-paid-in capital to offset the follow-on offering proceeds for the year ended December 31, 2015. (s) Segment Information Management has determined that it has one business activity and operates in one segment as it only reports financial information on an aggregate basis to its Chief Executive Officer, who is the Company’s chief operating decision maker. All tangible assets are held in the United States. (t) Net Loss Per Share Basic loss per share attributable to common stockholders is computed by dividing net loss by the weighted average number of common shares outstanding during each period. Diluted loss per common share is computed by dividing net loss available to common stockholders by the weighted average number of common shares and dilutive potential common share equivalents then outstanding, to the extent they are dilutive. Potential common shares consist of shares issuable upon the exercise of stock options and warrants (using the treasury stock method), and the weighted average conversion of the convertible preferred stock into shares of common stock (using the if-converted method). Dilutive loss per share is the same as basic loss per share for all periods presented because the effects of potentially dilutive items were anti-dilutive. Net loss Weighted average common shares outstanding, basic and diluted Net loss per share attributable to common stockholders $ $ (41,230) $ (5,811) $ 15,770,972 2,545,371 (2.61) $ (2.28) $ 2015 December 31, 2014 2013 (19,125) 232,512 (82.25) The Company excluded the following potentially dilutive securities, outstanding as of December 31, 2015, 2014 and 2013 from the computation of diluted net loss per share attributable to common stockholders for the years ended December 31, 2015, 2014 and 2013 because they had an anti-dilutive impact due to the net loss attributable to common stockholders incurred for the periods. Stock options to purchase common stock Warrants for the purchase of common stock Convertible preferred stock (as converted to common stock) (u) Recent Accounting Pronouncements 2015 1,967,906 47,710 — 2,015,616 December 31, 2014 1,613,544 47,710 — 1,661,254 2013 1,422,315 30,670 8,942,925 10,395,910 In May 2014, the FASB, issued accounting standard update, or ASU, 2014-09, Revenue from Contracts with Customers, or Topic 606 . The standard was issued to provide a single framework that replaces existing industry and transaction specific U.S. GAAP with a five step analysis of transactions to determine when and how revenue is recognized. The accounting standard update will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, to defer the effective date of ASU 2014-09 by one year. Therefore, ASU 2014-09 will become effective for the Company beginning in fiscal year 2018. Early adoption would be permitted for the Company beginning in fiscal year 2017. The standard permits the use of either the retrospective or cumulative transition method. The Company is currently evaluating the accounting, transition and disclosure requirements of the standard and cannot currently estimate the financial statement impact of adoption. 86                         Table of Contents In April 2015, the FASB issued accounting standard update 2015-03 , Interest — Imputation of Interest . The standard was issued to simplify the presentation of debt issuance costs and require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. This accounting standard update will be effective for the Company beginning in fiscal year 2016. The Company anticipates there will be no material impact on its financial statement upon adoption of this guidance. In April 2015, the FASB issued accounting standard update 2015-05 , Intangibles — Goodwill and Other — Internal- Use Software . The standard was issued to provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. This accounting standard update will be effective for the Company beginning in fiscal year 2016. The Company anticipates there will be no material impact on its financial statement upon adoption of this guidance. In July 2015, the FASB issued accounting standard update 2015-11 , Inventory — Simplifying the Measurement of Inventory . The standard simplifies the subsequent measurement of inventory by requiring inventory to be measured at the lower of cost and net realizable value, thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. The accounting standards update will not apply to inventories that are measured by using either the last- in, first-out method or the retail inventory method. This accounting standard update will be effective for the Company beginning in fiscal year 2017. The Company anticipates there will be no material impact on its financial statement upon adoption of this guidance. In November 2015, the FASB issued accounting standard update 2015-17, Income Taxes – Balance Sheet Classification of Deferred Taxes. The standard simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities be classified as noncurrent in a classified statement of financial position. Current GAAP requires an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts. This accounting standard update will be effective for the Company beginning in fiscal year 2017. The Company anticipates there will be no material impact to its financial statement upon adoption of this guidance. In February 2016, the FASB issued accounting standard update 2016-02, Leases (Topic 842) which supersedes FASB Accounting Standard Codification Leases (Topic 840). The standard is intended to increase the transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. This accounting standard update will be effective for the Company beginning in fiscal year 2019. The Company is currently evaluating the impact that adoption of the standard will have on the financial statements and related disclosures. (v ) Reclassifications Certain reclassifications have been made to prior year amounts to conform to the current year presentation. 87 Table of Contents (3) Balance Sheet Components Property and equipment, net consist of the following: Leasehold improvements Laboratory equipment and toolings Computer equipment Software Office equipment Furniture and fixtures Less accumulated depreciation December 31, 2015 2014 $ $ 86 $ 366 277 655 137 724 2,245 (841) 1,404 $ Depreciation expense for the years ended December 31, 2015 , 201 4 and 201 3 was $256 , $1 82 and $148 respectively. Accrued and other current liabilities consist of the following: Accrued clinical trial and research and development expenses Audit, consulting and legal fees Payroll and related expenses Accrued commission Warrant liability Other ( 4 )   Long-term Debt December 31, 2015 2014 $ $ 215 1,208 2,494 1,960 60 1,022 6,959 $ $ 69 — 138 166 167 636 1,176 (621) 555 109 72 2,497 1,969 420 705 5,772 On January 17, 2013, the Company entered into a Loan and Security Agreement, or the Original Term Loan Agreement, with Oxford providing for a $15,000 term loan facility consisting of original term loans of (i) a $7,500 tranche A term loan, (ii) a $2,500 tranche B term loan and (iii) a $5,000 tranche C term loan, maturing on February 1, 2017. The term loan facility is collateralized by a first-priority security interest in substantially all of the Company’s assets. Borrowings under the term loan facility bear interest at a rate equal to 8.4% per annum and the Original Term Loan Agreement provides for interest-only payments through June 30, 2015. The term loans include an additional lump sum payment of $975 due on February 1, 2017. On June 30, 2014, the Company entered into the Amended and Restated Loan and Security Agreement, or the Amended Term Loan Agreement, with Oxford, under which the interest-only period for the original term loans was extended to August 1, 2015 and raised an additional $10,000 in a fourth tranche (tranche D) maturing on January 1, 2019. The term loans are collateralized by a first-priority security interest in substantially all of the Company’s assets. The term loans bear interest at a rate equal to 8.4% per annum. The interest-only period for the tranche A, B and C term loans ends on August 1, 2015 and the interest- only period for the tranche D term loan ends on the same date, but was extended another year to August 1, 2016 as the Company raised at least $50,000 in gross proceeds as part of the IPO (see Note 1). The tranche D term loan includes an additional lump sum payment of $650 due on January 1, 2019. The Amended Term Loan Agreement contains various negative and affirmative covenants, including certain restrictive covenants that limit the Company’s ability to transfer or dispose of certain assets, engage in new lines of business, change the composition of Company management, merge with or acquire other companies, incur additional debt, create new liens and encumbrances, pay dividends or subordinated debt and enter into material transactions with affiliates, among others. The Amended Term Loan Agreement also contains financial reporting requirements. 88            Table of Contents In connection with the Original Term Loan Agreement and the Amended Term Loan Agreement, the Company issued to Oxford (i) seven -year warrants in Jan uary 2013 to purchase shares of the Company’s common stock with a value equal to 3.0% of the tranche A, B and C term loans amounts and (ii) seven -year warrants in June 2014 to purchase shares of the Company’s common stock with a value equal to 2.5% of the tranche D term loan amount. The warrants have an exercise price per share of $14.671 . On October 27, 2015, Oxford issued a notice to Sientra indicating that, in connection with the recent events involving Silimed and the Company, certain events of default have occurred and continue to exist under the Amended Term Loan Agreement. On October 28, 2015, Sientra repaid all principal, interest, other amounts and obligations owed to Oxford under the term loans for a total of $24 ,539 , following which the Company has no outstanding debt obligations. (5) Goodwill The Company evaluates goodwill for impairment at least annually on October 1 and whenever circumstances suggest st that goodwill may be impaired. On September 24, 2015, the Company experienced a significant decline in its common stock price, which was sustained through September 30, 2015. The significant decline in the Company’s common stock price for a sustained period, along with the impact from regulatory inquiries related to medical devices manufactured by Silimed, the Company’s contract manufacturer, were identified as potential indicators of impairment of goodwill and other intangibles. As a result, the Company was required to assess whether or not an impairment of its goodwill had occurred as of Septembe r 30, 2015. The Company assessed the impact of the recent downward volatility in the Company's common stock price and concluded that the sustained decline constituted a triggering event requiring an interim goodwill impairment test. The Company conducted the first step of the goodwill impairment test described above for its single reporting unit as of September 30, 2015. The fair value of the reporting unit exceeded its carrying value as of September 30, 2015 by 24.7% , and therefore goodwill was determined to not be impaired as of September 30, 2015. As a result of the actions taken by the Brazilian regulatory agency ANVISA on October 2, 2015, and the Company voluntarily placing a hold on the sale of all Sientra devices manufactured by Silimed on October 9, 2015, the Company experienced a significant decline in its common stock price, which was sustained through December 31, 2015. The significant decline in the Company’s common stock price for a sustained period, along with the impact from recent regulatory inquiries related to medical devices manufactured by Silimed, the Company’s contract manufacturer, were identified as potential indicators of impairment of goodw ill and the Company concluded that the se events constituted a triggering event requiring a goodwill impairment test. The Company conducted a step one analysis which consists of a comparison of the fair value of the Company as a single reporting unit using a market approach against its carrying amount, including goodwill. As a result of the step one analysis, it was determined that the carrying value exceeded its fair value; therefore the Company proceeded to step two of the goodwill impairment analysis. For step two, the Company compared the implied fair value of goodwill with the carrying amount of goodwill and based on the analysis, there was no implied goodwill; therefore the Company recorded a goodwill impairment charge of $14,278 for the quarter ended December 31, 2015 . 89 Table of Contents (6 )   Income Taxes Actual income tax expense differs from that obtained by applying the statutory federal income tax rate of 34% to income before income taxes as follows: Tax at federal statutory rate State, net of federal benefit Permanent items Research and development credits Benefit state rate change Other Change in valuation allowance $ $ 2015 (14,018) $ (1,624) 898 — 180 1 14,563 — $ Year Ended December 31, 2014 (1,976) $ (260) 580 (216) (941) 495 2,318 — $ 2013 (6,502) (576) 339 (232) — 15 6,956 — The tax effects of temporary differences and carryforwards that give rise to significant portions of the deferred tax assets are as follows: Net operating loss carryforwards Research and development credits Depreciation Accruals and reserves Intangibles Less valuation allowance Total deferred tax assets December 31, 2015 2014 $ 53,244 2,233 26 1,900 9,565 66,968 (66,968) — $ 39,372 2,230 36 5,035 5,732 52,405 (52,405) — $ $ The Company has established a full valuation allowance against its net deferred tax assets due to the uncertainty surrounding realization of such assets. As of December 31, 2015 , the Company had net operating loss carryforwards of approximately $137,832 and $120,056 available to reduce future taxable income, if any, for federal and state income tax purposes, respectively. The federal net operating loss carryforward begins expiring in 2027, and the state net operating loss carryforward s begin expiring in 2017. It is possible that the Company will not generate taxable income in time to use these NOLs before their expiration. In addition, under Section 382 of the Internal Revenue Code of 1986, as amended, or the Code, if a corporation undergoes an “ownership change ”, t he corporation's ability to use its pre-change NOL carryforwards and other pre-change tax attributes to offset its post-change income may be limited. In general, an “ownership change” occurs if there is a cumulative change in a loss corporation’s ownership by 5% shareholders that exceeds 50 percentage points over a rolling three-year period. The Company has not performed a detailed analysis to determine whether an ownership change under Section 382 of the Code has previously occurred. As a result, if the Company earn s net taxable income, its ability to use their pre-change net operating loss carryforwards to offset U.S. federal taxable income may become subject to limitations, which could potentially result in increased future tax liability to the Company . Until such analysis is completed, the Company cannot be sure that the full amount of the existing fede ral NOLs will be available to them, even if taxable income is generated before their expiration. As of December 31, 2015 , the Company had research and development credit carryforwards of approximately $1,804 and $1,762 available to reduce future taxable income, if any, for federal and California state income tax purposes, r espectively. The federal credit carryforwards begin expiring in 2027 and the state credits carryforward indefinitely. At December 31, 2015 , the Company had unrecognized tax benefits of approximately $732 associated with the research and development credits. The Company does not anticipate that total unrecognized net tax benefits will significantly change over the next twelve months. 90           Table of Contents A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: Ending balance at December 31, 2013 Additions based on tax positions taken in the current year Ending balance at December 31, 2014 Additions based on tax positions taken in the current year Ending balance at December 31, 2015 $ $ 671 61 732 — 732 It is the Company’s policy to include penalties and interest expense related to income taxes as a component of other expense and interest expense, respectively, as necessary. There was no interest expense or penalties related to unrecognized tax benefits recorded through December 31, 2015 . The Company files U.S. federal and state income tax returns in jurisdictions with varying statute of limitations. The years that may be subject to examination will vary by jurisdicti on. The Company’s tax years 201 1 to 201 5 will remain open for examination by the federal and state tax authorities. ( 7 )   Stockholders’ Equity (a) Authorized Stock The Company’s Amended and Restated Certificate of Incorporation, effective upon the completion of the IPO, authorizes the Company to issue 210,000,000 shares of common and preferred stock, consisting of 200,000,000 shares of common stock with $0.01 par value and 10,000,000 shares of preferred stock with $0.01 par value. As of December 31, 2015 , the Company has no preferred stock issued or outstanding . (b) Stock Options In April 2007, the Company adopted the 2007 Equity Incentive Plan, or 2007 Plan. The 2007 Plan provides for the granting of stock options to employees, directors and consultants of the Company. Options granted under the 2007 Plan may either be incentive stock options or nonstatutory stock options. Incentive stock options, or ISO s, may be granted only to Company employees. Nonstatutory stock options, or NSO s, may be granted to all eligible recipients. A total of 1,690,448 shares of the Company’s common stock were reserved for issuance for the 2007 Plan. As of December 31, 2015, pursuant to the 2007 Plan, there were 1,605,537 shares of common stock reserved and no shares of common stock available for future grants. The Company’s board of directors adopted the 2014 Equity Incentive Plan, or 2014 Plan, in July 2014, and the stockholders approved the 2014 Plan in October 2014. The 2014 Plan became effective upon completion of the IPO, at which time the Company ceased making awards under the 2007 Plan. Under the 2014 Plan, the Company may issue ISO, NSOs, stock appreciation rights, restricted stock awards, restricted stock unit awards and other forms of stock awards, or collectively, stock awards, all of which may be granted to employees, including officers, non-employee directors and consultants of the Company and their affiliates. ISOs may be granted only to employees. A total of 1,027,500 shares of common stock were initially reserved for issuance under the 2014 Plan, subject to certain annual increases. Options under the 2007 Plan and the 2014 Plan may be granted for periods of up to ten years as determined by the Company’s board of directors, provided, however, that (i) the exercise price of an ISO shall not be less than 100% of the estimated fair value of the shares on the date of grant, and (ii) the exercise price of an ISO granted to a more than 10% shareholder shall not be less than 110% of the estimated fair value of the shares on the date of grant. An NSO has no such exercise price limitations. The options generally vest with 25% of the grant vesting on the first anniversary and the balance vesting monthly on a straight-lined basis over the requisite service period of three additional years for the award. Additionally, options have been granted to certain key executives which vest upon achievement of performance conditions based on performance targets as defined by the board of directors, which have included net sales targets and defined corporate objectives over the performance period with possible payouts ranging from 0% to 100% of the target award . Compensation expense is recognized on a straight-lined basis over the vesting term of one year based upon the probable 91 Table of Contents performance target that will be met. The vesting provisions of individual options may vary but provide for vesting of at least 25% per year. As of December 31, 2015 , pursuant to the 2014 Plan, there were 1,325,759 shares of common stock reserved and 71,388 shares common stock available for future grants . The following summarizes all option activity under the 2007 and 2014 Plan: Balances at December 31, 2013 Granted Exercised Forfeited Balances at December 31, 2014 Granted Exercised Forfeited Balances at December 31, 2015 Vested and expected to vest at December 31, 2015 Vested and exercisable at December 31, 2015 Weighted average Option Shares exercise price Weighted average remaining contractual term (year) 1,422,315 266,069 (12,900) (20,578) 1,654,906 1,253,216 (36,189) (86,261) 2,785,672 2,785,672 1,486,809 $ $ $ $ $ 2.67 12.72 2.99 5.55 4.25 10.22 3.54 13.38 6.66 6.66 3.82 5.76 5.48 6.60 6.60 4.19 The weighted average grant date fair value of stock options granted to employees and directors during the years ended December 31, 2015 and 2014 , and 2013 was $4.60 , $6.82 , and $1.90 per share, respectively. Stock-based compensation expense for stock options for the years ended December 31, 2015 , 2014 and 2013 was $2,005 , $560 and $342 , respectively. Tax benefits arising from the disposition of certain shares issued upon exercise of stock options within two years of the date of grant or within one year of the date of exercise by the option holder, or Disqualifying Dispositions, provide the Company with a tax deduction equal to the difference between the exercise price and the fair market value of the stock on the date of exercise. When realized, those excess windfall tax benefits are credited to additional paid-in capital. As of December 31, 2015 there was $4,733 of total unrecognized compensation cost related to stock options granted under the plans . The costs are expected to be recognized over a weighted average period of 2.95 years. The expense is recorded within the operating expense components in the statement of operations based on the employees receiving the awards. The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock for those stock options that had exercise prices lower than the fair value of the Company’s common stock. The aggregate intrinsic value of stock options exercised was $597 , $176 , and $1 during the years ended December 31, 2015 , 2014 and 2013 , respectively . The expected term of employee stock options, risk ‑free interest rate and volatility represents the weighted average, based on grant date period, which the stock options are expected to remain outstanding. The Company utilized the simplified method to estimate the expected term of the options pursuant to ASC Subtopic 718 ‑10 for all option grants to employees. The expected volatility is based upon historical volatilities of an index of a peer group because it is not practicable to make a reasonable estimate of the Company’s volatility. The risk ‑free interest rate is based on the U.S. Treasury yield curve in effect at the time of the grant for periods corresponding with the expected term of the option. The dividend yield assumption is based on the Company’s history and expectation of dividend payouts. The Company has never declared or paid any cash dividends on its common stock, and the Company does not anticipate paying any cash dividends in the foreseeable future. As stock ‑based compensation expense recognized in the Company’s statement of operations is based on awards ultimately expected to vest, the amount has been reduced for estimated forfeitures. Forfeitures were estimated based on the Company’s historical experience and future expectations. For purposes of financial accounting for stock ‑based compensation, the Company has determined the fair values of its options based in part on the work of a third ‑party valuation specialist. The determination of stock ‑based compensation is inherently uncertain and subjective and involves the application of valuation models and assumptions requiring the use 92         Table of Contents of judgment. If the Company had made different assumptions, its stock ‑based compensation expense, and its net loss could have been significantly different. (c) Restricted Stock Units The Company issued restricted stock units, or RSUs, under the 2014 Plan, during the year ending December 31, 2015. The restricted stock units issued vest monthly, on a straight-line basis, over a 4 year requisite service period. Activity related to RSUs, is set forth below: Balance at December 31, 2014 Granted Vested Balance at December 31, 2015 Number of shares — 17,993 — 17,993 $ $ Weighted average grant date fair value — 3.88 — 3.88 The weighted average grant date fair value of RSUs granted to employees and directors during the year ended December 31, 2015 was $3.88 per share . Stock-based compensation expense for RSUs for the year ended December 31, 2015 was $2 . As of December 31, 2015, there was $67 of total unrecognized compensation cost related to non-vested RSU awards. The cost is expected to be recognized over a weighted average period of 3.87 years. (d) Employee Stock Purchase Plan The Company’s board of directors adopted the 2014 Employee Stock Purchase Plan, or ESPP, in July 2014, and the stockholders approved the ESPP in October 2014. The ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations. The ESPP provides offering periods not to exceed 27 months , and each offering period will include purchase periods, which will be the approximately six -month period commencing with one exercise date and ending with the next exercise date, except that the first offering period commenced on the first trading day following the effective date of the Company's registration statement. Employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the exercise date. The number of shares available for sale under the 2014 Employee Stock Purchase Plan will be increased annually on the first day of each fiscal year, equal to the lesser of i) 1% of the total outstanding shares of the Company’s common stock as of the last day of the immediately preceding fiscal year; ii) 3,000,000 shares of common stock, or iii) such lesser amount as determined by the board of directors. As of December 31, 2015, the number of shares of common stock reserved for issuance under the ESPP was 404,629 . During the year ended December 31, 2015 , employees purchased 44,250 shares under the 2014 ESPP at a weighted average exercise price of $12.75 per share. As of December 31, 2015, the number of shares of common stock available for future issuance under the ESPP was 360,379 . Stock -based compensation related to the ESPP for the years ended December 31, 2015 and 2014 was $375 and $34 , respectively. ( 8 )     Commitments and Contingencies (a) Operating Lease Commitment In August 2013, the Company entered into a four month warehouse lease in Santa Barbara, California, commencing on September 1, 2013. This operating lease is used for additional general office, warehouse, and research and development. This lease has been renewed until January 2019. In March 2014, the Company entered into a 68 month lease agreement in Santa Barbara, California. The operating lease is for general office use only and commenced on July 1, 2014. 93 Table of Contents The terms of the facility lease provide for rental payments on a graduated scale. The Company recognizes rent expense on a straight-line basis over the lease term. Rent expense for the years ended December 31, 2015 , 2014 and 2013 was $519 , $424 and $359 respectively. As of December 31, 2015 , future minimum lease payments under all non ‑cancelable operating leases are as follows: Year Ended December 31: 2016 2017 2018 2019 2020 and thereafter $ $ 503 510 518 436 72 2,039 (b) Separation and Consulting Agreements On November 12, 2015, the Company entered into the following Separation and Consulting Agreements: Mr. Hani Zeini stepped down from his role as President and Chief Executive Officer and he and the Company entered into a Separation Agreement . Pursuant to the Separation Agreement, Mr. Zeini received: (i) a lump sum payment of $871 , which is equivalent to the sum of twelve (12) months of his base salary as in effect on the separation date plus the annual bonus earned by Mr. Zeini in connection with the completion of the fiscal year prior to the separation date, and (ii) up to twelve (12) months of company-paid health insurance premiums to continue his coverage. As a result of this Separation Agreement, the Company incurred $871 in termination benefits which was recorded during the year ended December 31, 2015. Further, o n February 16, 2 016, Mr. Zeini resigned from the Company’s board of directors . The Company entered into a Consulting Agreement with Mr. Zeini. The term of the Consulting Agreement is effective as of November 12, 2015 through December 31, 2016. Pursuant to the Consulting Agreement, Mr. Zeini shall provide consulting services to the Company in the area of his experience and expertise for up to thirty (30) hours per month and Mr. Zeini will be compensated in the amount of $43 per month. As a result of the terms and conditions of this Consulting Agreement, the Company accrued for all consulting services to be rendered of $586 which was recorded during the year ended December 31, 2015. Mr. Joel Smith stepped down from his role as General Counsel, Secretary and Chief Compliance Officer of the Company. On December 7, 2015, he and the Company entered into a Separation Agreement and pursuant to the Separation Agreement, Mr. Smith received: (i) aggregate payments equivalent to nine (9) months of his base salary as in effect on the separation date plus the pro-rated annual bonus earned by Mr. Smith in connection with the completion of the fiscal year prior to the separation date of $113 , and (ii) up to nine (9) months of company-paid health insurance premiums to continue his coverage. As a result of this Separation Agreement, the Company incurred $338 in termination benefits which was recorded during the year ended December 31, 2015. (c) Contingencies The Company is subject to claims and assessments from time to time in the ordinary course of business. The Company accrues a liability for such matters when it is probable that future expenditures will be made and such expenditures can be reasonably estimated. There were no contingent liabilities requiring accrual as of December 31, 2015 . In 2012, the Company filed a claim with the Hartford Insurance Company, or Hartford for reimbursement of legal costs incurred in connection with litigation with a competitor that was resolved in 2013. The Company held a D&O insurance policy with Hartford, and the Company and Hartford settled the matter in May 2014. The Company received settlement payments from Hartford and recovery of costs associated with the litigation of $0 , $2,358 , and $351 for the years ended December 31, 2015, 2014 and 2013, respectively. On September 25, 2015, a lawsuit styled as a class action of the Company’s stockholders was filed in the United States District Court for the Central District of California. The lawsuit names the Company and certain of its officers as defendants and alleges violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, or the 94 Table of Contents Exchange Act, in connection with allegedly false and misleading statements concerning the Company’s business, operations, and prospects. The plaintiff seeks damages and an award of reasonable costs and expenses, including attorneys’ fees. On November 24, 2015, three stockholders (or groups of stockholders) filed motions to appoint lead plainti ff(s) and to approve their selection on lead counsel. On December 10, 2015, the court entered an order appointing lead plaintiffs and approving their se lection of lead counsel. On February 19, 2016, lead plaintiffs filed their consolidated amended complaint. On October 28 , November 5, and November 19, 2015, three lawsuits styled as class actions of the Company’s stockholders were filed in the Superior Court of California for the County of San Mateo. The lawsuits name the Company , certain of its officers and directors, and the underwriters associated with the Company’s follow-on public offering that closed on September 23, 2015 as defendants. The lawsuits allege violations of Sections 11, 12(a)(2), and 15 of the Securities Act in connection with allegedly false and misleading statements in the Company’s offering documents associated with the follow-on offering concerning its business, operations, and prospects. The plaintiffs seek damages and an award of reasonable costs and expenses, including attorneys’ fees. On December 4, 2015, defendants removed all three lawsuits to the United States District Court for the Northern District of California. On December 15 and December 16, 2015, plaintiffs filed motions to remand the lawsuits back to San Mateo Superior Court , or the Motions to Remand. On January 19, 2016, defendants filed their opposition to the Motions to Remand, and plaintiffs filed their reply in support of the Motions to Remand on January 26, 2016. It is possible that additional suits will be filed, or allegations made by stockholders, with respect to these same or other matters and also naming the Company and/or its officers and directors as defendants. The Company believes it has meritorious defenses and intends to defend these lawsuits vigorously. Due to the early stage of these proceedings, the Company is not able to predict or reasonably estimate the ultimate outcome or possible losses relating to these claims. (9 ) Subsequent Events (a) Resumption of Sales On March 1, 2016, after the completion of extensive independent, third-party testing and analyses of our Breast Products in the U.S., we lifted the temporary hold on the sale of our devices manufactured by Silimed. We also sent a letter to our Plastic Surgeons informing them of the Company’s market re-entry plans. The conclusive results of our testing indicate no anticipated significant safety concerns with the use of our products, including our breast implants, consistent with their approval status since 2012. (b) A c qu i sition of bioCorneum On March 9, 2016, pursuant to the Asset Purchase Agreement, or the Purchase Agreement, by and among the Company, Enaltus, LLC, and HealthEdge Investment Fund, L.P, we acquired certain assets of bioCorneum, an advanced silicone gel scar management therapy product for the purchase price of $7,000 in cash. The assets acquired consist of inventory, intellectual p roperty, specified contracts and the associated assumed liabilities. We expect to account for the transaction as a business combination and are in the process of determining the allocation of the purchase price to acquired assets and assumed liabilities. A determination of the acquisition-date fair values of the assets acquired and the liabilities assumed is pending the completion of an independent appraisal and other evaluations and therefore further disclosures have not been made . (1 0 ) Summary of Quarterly Financial Information (Unaudited) The following tables set forth our unaudited quarterly statements of operations data in dollars and as a percentage of revenue and our key metrics for each of the eight quarters ended December 31, 2015 . We have prepared the quarterly data on a consistent basis with the audited financial statements included in this report. In the opinion of management, the financial information reflects all necessary adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of this data. This information should be read in conjunction with the audited financial statements and 95 Table of Contents related notes included elsewhere in this report. The results of historical periods are not necessarily indicative of the results of operations for a full year or any future period. Quarter Ended 2015 Net sales Gross profit Net loss Net loss per share: Basic and diluted 2014 Net sales Gross profit Net loss Net loss per share: Basic and diluted March 31 June 30 $ 12,434 $ 9,197 (3,384) September 30 December 31 1,537 990 (28,250) 9,929 $ 6,996 (6,604) 14,206 $ 10,269 (2,992) $ (0.23) $ (0.20) $ (0.43) $ (1.57) Quarter Ended March 31 June 30 $ 10,228 $ 7,654 (953) September 30 December 31 12,116 8,903 (3,197) 10,670 $ 7,838 (1,452) 11,719 $ 8,838 (209) $ (4.59) $ (1.00) $ (6.94) $ (0.34) 96 Table of Contents S ientra , I nc . Schedule II — Valuation and Qualifying Accounts December 31, 201 5 , 201 4 and 201 3 (In thousands) Year Ended December 31, 2013 Allowance for sales returns Year Ended December 31, 2014 Allowance for sales returns Year Ended December 31, 2015 Allowance for sales returns (1) Amounts represent actual sales returns. Balance at beginning of period Additions charged to costs and expenses Deductions  (1) Balance at end of period $ $ $ 4,334 8,270 10,018 $ $ $ 93,768 110,033 85,429 $ $ $ (89,832) (108,285) (94,787) $ $ $ 8,270 10,018 660 97 Table of Contents Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. SIGNATURE S Date: March 10, 2016 SIENTRA, INC. By: /s/ Jeffrey Nugent Jeffrey Nugent Chief Executive Officer POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Jeffrey Nugent and Matthew Pigeon, and each of them, as his true and lawful attorneys ‑in ‑fact and agents, with full power of substitution for him, and in his name in any and all capacities, to sign any and all amendments to this Annual Report on Form 10 ‑K, and to file the same, with exhibits thereto and other documents in connection therewith, with the U.S. Securities and Exchange Commission, granting unto said attorneys ‑in ‑fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys ‑in ‑fact and agents, and either of them, his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated. Name /s/ Jeffrey Nugent Jeffrey Nugent /s/ Matthew Pigeon Matthew Pigeon /s/ Nicholas Simon Nicholas Simon /s/ Timothy Haines Timothy Haines /s/ R. Scott Greer R. Scott Greer /s/ Kevin O’Boyle Kevin O’Boyle Title Date Chief Executive Officer and Director (Principal Executive Officer) March 1 0 , 201 6 Chief Financial Officer and Treasurer (Principal Financial and Accounting Officer) March 1 0 , 201 6 March 1 0 , 201 6 March 1 0 , 201 6 March 1 0 , 201 6 March 1 0 , 201 6 Director Director Director Director 98 Exhibit  Number Exhibit Description 3.1 Amended and Restated Certificate of Incorporation of the Registrant 3.2 Amended and Restated Bylaws of the Registrant. 4.1 Form of Common Stock Certificate of the Registrant. 4.2 Conversion and Amendment Agreement by and among the Registrant and certain of its stockholders, dated October 10, 2014. 4.3 Amended and Restated Investor Rights Agreement, dated March 28, 2012, by and among Sientra, Inc., and the investors and stockholders party thereto. 4.4 Warrant to Purchase Stock issued to Oxford Finance LLC, dated January 17, 2013. 4.5 Warrant to Purchase Stock issued to Oxford Finance LLC, dated January 17, 2013. 4.6 Warrant to Purchase Stock issued to Oxford Finance LLC, dated August 1, 2013. 4.7 Warrant to Purchase Stock issued to Oxford Finance LLC, dated August 1, 2013. 4.8 Warrant to Purchase Stock issued to Oxford Finance LLC, dated December 13, 2013. 4.9 Warrant to Purchase Stock issued to Oxford Finance LLC, dated December 13, 2013. 10.1# Form of Indemnity Agreement by and between Sientra, Inc. and its directors and officers. 10.2# 2007 Equity Incentive Plan, as amended, and forms of award agreements thereunder. 10.3# 2014 Equity Incentive Plan and forms of award agreements thereunder. 10.4# 2014 Non ‑Employee Director Compensation Policy. EXHIBIT INDEX Incorporated by Reference Form S ‑1/A SEC File  No. 333 ‑198837 Exhibit 3.2 Filing October 20, 2014 Filed  Herewith S ‑1/A 333 ‑198837 S ‑1/A 333 ‑198837 3.4 4.1 October 20, 2014 October 20, 2014 S ‑1/A 333 ‑198837 4.11 October 20, 2014 S ‑1 333 ‑198837 4.2 September, 19 2014 S ‑1 333 ‑198837 S ‑1 333 ‑198837 S ‑1 333 ‑198837 S ‑1 333 ‑198837 S ‑1 333 ‑198837 S ‑1 333 ‑198837 4.3 4.4 4.5 4.6 4.7 4.8 September, 19 2014 September, 19 2014 September, 19 2014 September, 19 2014 September, 19 2014 September, 19 2014 S ‑1 333 ‑198837 10.1 September, 19 2014 S ‑1 333 ‑198837 10.2 September, 19 2014 S ‑1/A 333 ‑198837 10.3 October 20, 2014 S ‑1 333 ‑198837 10.4 September, 19 2014 Table of Contents Exhibit  Number Exhibit Description 10.5# 2014 Employee Stock Purchase Plan. 10.6 Multi ‑Purpose Commercial Building Lease, dated March 28, 2014, by and between Sientra, Inc. and Fairview Business Center, L.P. 10.7 + Amended and Restated Exclusivity Agreement, dated April 4, 2007, by and between Sientra, Inc. (formerly, Juliet Medical, Inc.) and Silimed Industria de Implantes Ltda. (formerly, Silimed ‑Silicone e Instrumental Medico ‑Cirugio e Hospitalar Ltda.). 10.8 Amendment No. 1 to Amended and Restated Exclusivity Agreement, dated May 12, 2010, by and between Sientra, Inc. (formerly, Juliet Medical, Inc.) and Silimed Industria de Implantes Ltda. (formerly, Silimed ‑Silicone e Instrumental Medico ‑Cirugio e Hospitalar Ltda.). 10.9 Amendment No. 2 to Amended and Restated Exclusivity Agreement, dated November 8, 2013, by and between Sientra, Inc. (formerly, Juliet Medical, Inc.) and Silimed Industria de Implantes Ltda. (formerly, Silimed ‑Silicone e Instrumental Medico ‑Cirugio e Hospitalar Ltda.). Incorporated by Reference Form S ‑1/A SEC File  No. 333 ‑198837 Exhibit 10.5 Filing October 20, 2014 Filed  Herewith S ‑1 333 ‑198837 10.6 September, 19 2014 S ‑1/A 333 ‑198837 10.8 October, 20 2014 S ‑1 333 ‑198837 10.9 September, 19 2014 S ‑1 333 ‑198837 10.10 September, 19 2014 10.10 # Offer Letter to R. Scott Greer, dated July 9, 2014. 10.11 # Offer Letter to Kevin O’Boyle, dated July 9, 2014. 10.12 # Offer Letter to Jeffrey Nugent, dated July 9, 2014. 10.13 # 2014 Employee Stock Purchase Plan. S ‑1 S ‑1 S ‑1 333 ‑198837 333 ‑198837 333 ‑198837 S ‑1/A 333 ‑198837 10.11 10.12 10.13 10.5 September, 19 2014 September, 19 2014 September, 19 2014 October 20, 2014 Table of Contents Exhibit  Number Exhibit Description 10.14 # Amended and Restated Form 10-K SEC File  No. 001-36709 Exhibit 10.18 Filing March 18, 2015 Filed  Herewith Incorporated by Reference Employment Agreement by and between Sientra, Inc. and Charles Huiner, dated February 1, 2015. 10.15 # Amended and Restated 10-Q 001-36709 10.1 May 14, 2015 Employment Agreement by and between Sientra, Inc. and Matthew Pigeon, dated February 1, 2015. 10.16# Separation Agreement by and between Sientra, Inc. and Hani Zeini, dated November 12, 2015 . 10.17# Consulting Agreement by and between Sientra, Inc. and Hani Zeini, dated November 12, 2015. 10.18# Employment Agreement by and between Sientra, Inc. and Jeffrey Nugent, dated November 12, 2015. 10.19# Separation Agreement by and between Sientra, Inc. and Joel Smith, dated December 7, 2015. 10.20# Sientra, Inc. Inducement Plan and forms of award agreements thereunder. 16.1 Letter from PricewaterhouseCoopers LLP to the Securities and Exchange Commission, dated September 1, 2015. 21.1 List of significant subsidiaries of the registrant. 23.1 Consent of KPMG LLP, an independent registered public accounting firm. 24.1 Power of Attorney (included in signature page to this Annual Report on Form 10 ‑K). 31.1 Certification of Principal Executive Officer pursuant to Rule 13a ‑14(a) or Rule 15d ‑14(a) of the Securities Exchange Act of 1934, as amended. 10-Q 001-36709 10.1 November 16, 2016 10-Q 001-36709 10.2 November 16, 2016 10-Q 001-36709 10.3 November 16, 2016 S ‑1/A 333 ‑206755 16.1 September 3, 2015 S ‑1 333 ‑198837 21.1 September 19, 2014 X X X X X Table of Contents Exhibit  Number Exhibit Description Form Incorporated by Reference SEC File  No. Exhibit Filing 31.2 Certification of Principal Financial Officer pursuant to Rule 13a ‑14(a) or Rule 15d ‑14(a) of the Securities Exchange Act of 1934, as amended. 32.1 Certification of Principal 32.2 Certification of Principal Executive Officer pursuant to Rule 13a ‑14(b) of the Securities Exchange Act of 1934, as amended, and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes ‑Oxley Act of 2002. Financial Officer pursuant to Rule 13a ‑14(b) of the Securities Exchange Act of 1934, as amended, and 18 U.S.C. Section 1350, as adopted pursuant Section 906 of the Sarbanes ‑Oxley Act of 2002. 101.INS* XBRL Instance Document. 101.SCH* XBRL Taxonomy Extension Schema Document. Filed  Herewith X X X 101.CAL* XBRL Taxonomy Extension Calculation Linkbase Document. 101.DEF* XBRL Taxonomy Extension Definition Linkbase Document. 101.LAB* XBRL Taxonomy Extension Label Linkbase Document. 101.PRE* XBRL Taxonomy Extension Presentation Linkbase Document. + Confidential treatment has been granted with respect to certain portions of this exhibit. Omitted portions have been filed separately with the SEC. # Indicates management contract or compensatory plan, contract, or agreement. * XBRL (Extensible Business Reporting Language) information is furnished and not filed herewith, is not a part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, is deemed not filed for purposes of section 18 of the Securities Exchange Act of 1934, and otherwise is not subject to liability under these sections. December 7 , 2015 Joel Smith Address: last address on file with Company RE:  Separation Agreement Dear Joel : This letter sets forth the terms and conditions of our agreement (the “Agreement”) regarding the separation of your employment with Sientra, Inc. (the “Company”) . This Agreement will become effective on the “Effective Date” as defined in Section 11 herein. You and the Company hereby agree as follows: 1.  Separation .  You have submitted and the Company has accepted your resignation from the Company, including any and all positions and offices held by you, effective November 12 , 2015 (the “Separation Date”). 2.  Separation Benefits.  In exchange for your covenants and releases herein, and provided that this Agreement becomes effective as specified in Section 1 1 below, the Company will provide you with the following separation benefits (collectively, the “Separation Benefits”) , items (a) (i) and (b) of which are equivalent in amount to those described in Section 6.3 of the Employment Agreement between you and the Company effective February 1, 2015 (the “Employment Agreement”) . (a)  S alary .  (i) You shall receive aggregate payments equivalent to nine ( 9 ) months of your base salary as in effect on the Separation Date, paid in equal installm ents on the Company’s regularly- scheduled payroll dates beginning with the first such payroll date following the Effective Date. (ii) In addition, you shall receive a p ro-rated annual bonus of $ 112,548 with respect to the fiscal year prior to the Separation Date. Payment of such bonus shall be made in a lump sum as soon as practicable following the completion of such fiscal year , but no later than January 15, 2016. (b)  Health  Care  Coverage.  Provided further that you timely elect continued coverage under COBRA, the Company shall pay your COBRA premiums to continue your coverage (including coverage for eligible dependents, if applicable) (“ COBRA Premiums ”) through the period (the “ COBRA Premium Period ”) starting on the Separation Date and ending on the earliest to occur of: (i) nine ( 9 ) months following the Separation Date; (ii) the date you become eligible for group health insurance coverage through a new employer; or (iii) the date you cease to be eligible for COBRA continuation coverage for any reason, including plan termination. In the event you become covered under another employer’s group health plan or otherwise cease to be eligible for COBRA during the COBRA Premium Period, immediately notify the Company of such event. Notwithstanding the foregoing, if the Company determines, in its sole discretion, that you must Joel Smith December 7 , 2015 Page 2 it cannot pay the COBRA Premiums without a substantial risk of violating applicable law (including, without limitation, Section 2716 of the Public Health Service Act), the Company shall in lieu thereof provide to you a taxable monthly payment in an amount equal to the monthly COBRA premium that you would be required to pay to continue your group health coverage in effect on the date of your employment termination (which amount shall be based on the premium for the first month of COBRA coverage), which payments shall be made on the last day of each month regardless of whether you elect COBRA continuation coverage and shall end on the earlier of (x) the date upon which you obtain other employment or (y) the last day of the 9 th calendar month following the Separation date. (c)  Tax Withholding. All compensation described in this Section 2 will be subject to the Company’s collection of all applicable federal, state and local income and employment withholding taxes. (d)  Final  Expense  Report.  With in seven ( 7 ) days of the Separation Date , the Company will provide you a complete list of all expenses submitted by you in the 3 and 4 quarters of 2015 , indicating whether they have been paid by the Company. You will have thirty (30) days from the Separation Date to submit a final expense report for business expenses incurred through the Separation Date. Reimbursement for such expenses will be made to you within five (5) days after receipt of the expense report. rd th (e)  Post-Service  Option  Exercise  Period.  With respect to your outstanding options to purchase common stock of the Company, notwithstanding anything to the contrary in the governing plan or award agreement, you will be permitted to exercise such options until the later of (i) the final day of the post-termination exercise period provided in the relevant option agreement (including any longer period applicable in the case of death or disability, if your service terminated by reason of death or disability); or (ii) March 31, 2017; provided, however, that no option shall be exercisable later than the expiration of the term of such option. (f)  Legal Fees.  The Company agrees to pay (a) the legal fees set forth on the invoice from Fish & Richardson P.C. (“Fish”) dated November 9, 2015 and any reasonable legal fees set forth on a subsequent Fish invoice presented to the Company within five (5) days following the date of this Agreement; and (b) up to $10,000 in reasonable legal fees incurred by you from Fish in connection with the negotiation of this Agreement, which amounts shall , in each case, be paid directly to Fish promptly upon presentation of a stat ement of fees actually incurred . 3.  Other Compensation and Benefits.  Except as expressly provided herein or pursuant to the terms of any plan providing for retirement benefits, including, without limitation, any 401(k) plan, sponsored by the Company for your benefit, you acknowledge and agree that you are not entitled to and will not receive any additional compensation, wages, reimbursement, severance, or benefits from the Company. 4.  Termination of The Company’s Obligations .  Notwithstanding any provisions in this Agreement to the contrary and except as consented to above, the Company’s obligations hereunder shall cease and be rendered a nullity immediately should you fail to comply with any of the provisions of this Agreement. Joel Smith December 7 , 2015 Page 3 5.  Company Property .  You represent and confirm that no later than December 7 , 2015 , you will return to the Company the Company - owned laptop , i P ad, and building-access card, and any Company documents (and all copies thereof) and other property of the Company in your possession or control , including, but not limited to, computer security access, files, business plans, notes, financial information, financial information, data, computer-recorded information, tangible property, including entry cards, keys and any other materials of any nature pertaining to your work with the Company, and any documents or data of any description (or any reproduction of any documents or data) containing or pertaining to any proprietary or confidential material of the Company; provided that: (a) you shall be permitted to retain copies of documents relating to the terms and conditions of your employment with the Company (for example, copies of Stock Option Agreements); and (b) Fish shall be permitted to retain an imaged copy of the hard-drive s of your Company lap-top and i P ad sole l y for use in connection with any “Proceeding” as that term is defined in the Indemnification Agreement dated October 21, 2011, subject to your continued obligations under the Company's Confidentiality, Inventions and Non-Interference Agreement as set forth in Paragraph 6.of the Agreement . 6.  Confidential Information and Proprietary Information Obligations.  You acknowledge signing the Company’s Confidentiality, Inventions and Non-Interference Agreement (the “CINA”) c ontaining a confidentiality agreement in connection with your employment with the Company. You represent that you have complied with and will continue to comply with the terms of the CINA. 7.  Non-Disparagement; Inquiries .    You shall not make any disparaging comments or statements about the Company, its services, its products, its work, the members of its Board of Directors (the “Board”), or executive management. The Company will follow its standard neutral reference policy in response to any inquiries regarding you from prospective employers . The Company agrees to direct the members of the Board and executive officers of the Company not to make any disparaging comments about you, your professional capabilities or your service to the Company. Nothing in this Agreement shall preclude you or the Company (or its employees, officers, directors, or agents) from responding accurately and fully to any question, inquiry or request for information when required by legal process. 8.  Cooperation and Assistance .   You agree that you will not voluntarily provide assistance, information, encouragement, or advice, directly or indirectly (including through agents or attorneys), to any person or entity in connection with any claim by or against the Company, nor shall you induce or encourage any person or entity to do so. The foregoing sentence shall not prohibit you from testifying truthfully under subpoena. You warrant that you have not previously provided assistance, information, encouragement, or advice, directly or indirectly, to any person or entity in connection with any claim by or against the Company. You agree to provide (voluntarily and without legal compulsion) prompt cooperation and accurate and complete information to the Company in the event of litigation or government proceeding or investigation involving the Company or its officers or directors and to respect and preserve all privileges held by or available to the Company. The Company agrees to compensate you for your time spent consulting with and traveling to any litigation-related proceeding at a reasonable rate to be agreed between you and the Company plus reimbursement of reasonable travel costs. Joel Smith December 7 , 2015 Page 4 9.  Injunctive Relief.  The parties agree that any remedy at law will be inadequate for any breach by you or the Company of the covenants under Sections 6 , 7 , and 8 of this Agreement, and that each party shall be entitled to an injunction both preliminary and final, and any other appropriate equitable relief to enforce her or its rights set forth in these Sections. Such remedies shall be cumulative and non-exclusive, being in addition to any and all other remedies either party may have. 10.  Release of Claims.     (a)  General  Release.    In exchange for the consideration provided to you under this Agreement to which you would not otherwise be entitled, including but not limited to the Separation Benefits, you hereby generally and completely release the Company and its current and former directors, officers, employees, shareholders, partners, agents, attorneys, predecessors, successors, parent and subsidiary entities, insurers, affiliates, investors and assigns (collectively, the “Released Parties”) of and from any and all claims, liabilities and obligations, both known and known, that arise out of or are in any way related to events, acts, conduct, or omissions occurring prior to or on the date you sign this Agreement (collectively, the “Released Claims”) . (b)  Scope of Release.  The Released Claims include, but are not limited to: (i) all claims arising out of or in any way related to your employment with the Company, the Employment Agreement, or the termination of your employment: (ii) all claims related to your compensation or benefits from the Company, including salary, bonuses, commissions, vacation pay, expense reimbursements, severance pay, fringe benefits, stock, stock options, or any other ownership interests in the Company: (iii) all claims for breach of contract, wrongful termination, and breach of the implied covenant of good faith and fair dealing; (iv) all tort claims, including claims for fraud, defamation, emotional distress, wrongful termination, and discharge in violation of public policy; and (v) all federal, state, and local statutory claims, including claims for discrimination, harassment, retaliation, attorneys’ fees, or other claims arising under the federal Civil Rights Act of 1964 (as amended), the federal Americans with Disabilities Act of 1990, the Age Discrimination in Employment Act (“ADEA”), the federal Family and Medical Leave Act (as amended) (“FMLA”), the California Family Rights Act (“CFRA”), the California Labor Code (as amended), the California Unruh Act, and the California Fair Emp loyment and Housing Act (as amended). (c)  Excluded Claims.  Notwithstanding the foregoing, the following are not included in the Released Claims (the “Excluded Claims”): (i) any rights or claims for indemnification you may have pursuant to any written indemnification agreement with the Company to which you are a party, the charter, bylaws, or operating agreements of the Company, or under applicable law; (ii) any rights or claims which are not waivable as a matter of law; and (iii) any claims for breach of this Agreement. In addition, nothing in this Agreement prevents you from filing, cooperating with, or participating in any proceeding before the Equal Employment Opportunity Commission, the Department of Labor, the California Department of Fair Employment and Housing, or any other government agency, except that you acknowledge and agree that you hereby waive your right to any monetary benefits in connection with any such claim, charge or proceeding. You represent and warrant that, other than the Excluded Claims, you are not aware of any claims you have or might have against any of the Released Parties that are not included in the Released Claims.   Joel Smith December 7 , 2015 Page 5 (d)  Acknowledgements.    You acknowledge that (i) the consideration given to you in exchange for the waiver and release in this Agreement is in addition to anything of value to which you were already entitled; (ii) that you have been paid for all time worked, have received all the leave, leaves of absence and leave benefits and protections for which you are eligible, and have not suffered any on ‑the-job injury for which you have not already filed a claim; (iii) you have been given sufficient time     to consider this Agreement and to consult an attorney or advisor of your choosing; and (iv) you are knowingly and voluntarily executing this Agreement waiving and releasing any claims you may have as of the date you execute it. (e)  The Company, on behalf of itself, and each of its parents, subsidiaries and affiliates, and each of them, hereby covenants not to sue you and fully releases and discharges you, your descendants, dependents, heirs, executors, administrators, assigns, and successors with respect to and from any and all claims, demands, rights, liens, agreements or contracts (written or oral), covenants, actions, suits, causes of action, obligations, debts, costs, expenses, attorneys’ fees, damages, judgments, orders and liabilities of whatever kind or nature in law, equity or otherwise, to the extent known by the Company or any member of the Board as of the Separation Date (each, a “Claim”) (including, without limitation, any Claim arising out of or in any way connected with your service as an officer, director, or employee of Company, or any other transactions, occurrences, acts or omissions or any loss, damage or injury whatever), resulting from any act or omission by or on the part of you, committed or omitted prior to the date of Company’s execution of this Agreement. 11.  ADEA Waiver .  You knowingly and voluntarily waive and release any rights you may have under the ADEA (defined above). You also acknowledge that the consideration given for your releases in this Agreement is in addition to anything of value to which you were already entitled. You are advised by this writing that: (a) your waiver and release do not apply to any claims that may arise after you sign this Agreement; (b) you should consult with an attorney prior to executing this release (and you have done so); (c) you have twenty-one (21) days within which to consider this release (although you may choose to voluntarily execute this release earlier); (d) you have seven (7) days following the execution of this release to revoke this Agreement; and (e) this Agreement will not be effective until the eighth day after you sign this Agreement, provided that you have not earlier revoked this Agreement (the “Effective Date” ). You will not be entitled to receive any of the benefits specified by this Agreement unless and until it becomes effective. 12.  Section 1542 Waiver .  In giving the applicable releases set forth herein, which include claims which may be unknown at present, each party acknowledges that you or it have or has read and understand(s) Section 1542 of the Civil Code of the State of California which reads as follows: A general release does not extend to claims which the creditor does not know or suspect  to exist  in his or her favor  at the time  of executing  the release,  which  if known by him or her must have materially affected his or her settlement with the debtor. Joel Smith December 7 , 2015 Page 6 Each party expressly waives and relinquishes all rights and benefits under this section and any law or legal principle of similar effect in any jurisdiction with respect to claims released hereby. 13.  No Admissions.  The parties hereto hereby acknowledge that this is a compromise settlement of various matters, and that the promised payments in consideration of this Agreement shall not be construed to be an admission of any liability or obligation by either party to the other party or to any other person or entity whomsoever. 14.  Entire Agreement .  This Agreement constitutes the complete, final and exclusive embodiment of the entire Agreement between you and the Company with regard to the subject matter hereof. It is entered into without reliance on any promise or representation, written or oral, other than those expressly contained herein. It may not be modified except in writing signed by you and the Chairman of the Board of the Company. Each party has carefully read this Agreement, has been afforded the opportunity to be advised of its meaning and consequences by his or its respective attorneys, and signed the same of his or its free will. 15.  Successors and Assigns.  This Agreement shall bind the heirs, personal representatives, successors, assigns, executors, and administrators of each party, and inure to the benefit of each party, its agents, directors, officers, employees, servants, heirs, successors and assigns. 16.  Applicable Law.  This Agreement shall be deemed to have been entered into and shall be construed and enforced in accordance with the laws of the State of California as applied to contracts made and to be performed entirely within California. 17.  Severability .  If a court or arbitrator of competent jurisdiction determines that any term or provision of this Agreement is invalid or unenforceable, in whole or in part, the remaining terms and provisions hereof shall be unimpaired. Such court or arbitrator will have the authority to modify or replace the invalid or unenforceable term or provision with a valid and enforceable term or provision that most accurately represents the parties’ intention with respect to the invalid or unenforceable term or provision. 18.  Indemnification.  The Company will indemnify and save harmless you from any loss incurred directly or indirectly by reason of the falsity or inaccuracy of any representation made herein. The Company and you acknowledge and agree that the terms of the Company’s standard form of indemnification agreement for members of the Board and executive officers of the Company have applied to you in your role as an executive officer of the Company . The Company hereby affirms its continuing agreements and obligations as set forth in the Indemnification Agreement between you and the Company dated October 21, 2011 . 19.  Authorization.  You and the Company warrant and represent that there are no liens or claims of lien or assignments in law or equity or otherwise of or against any of the claims or causes of action released herein and, further, that each of them are fully entitled and duly authorized to give their complete and final general release and discharge. Joel Smith December 7 , 2015 Page 7 20.  Counterparts.  This Agreement may be executed in two counterparts, each of which shall be deemed an original, all of which together shall constitute one and the same instrument. 21.  Section Headings.  The section and paragraph headings contained in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. 22.  Photocopies.  A photocopy of this executed Agreement shall be as valid, binding, and effective as the original Agreement. 23.  Section 409A.  It is intended that all of the benefits and payments payable under this Agreement satisfy, to the greatest extent possible, an exemption from Section 409A of the Internal Revenue Code of 1986, as amended (“Section 409A”), and this Agreement will be construed to the greatest extent possible as consistent with those exemptions, and to the extent not so exempt, this Agreement (and any definitions hereunder) will be construed to the greatest extent possible in a manner that complies with Section 409A. For purposes of Section 409A, your right to receive any installment payments under this Agreement (whether severance payments, reimbursements or otherwise) shall be treated as a right to receive a series of separate payments and, accordingly, each installment payment hereunder shall at all times be considered a separate and distinct payment. Notwithstanding any provision to the contrary in this Agreement, if you are deemed by the Company at the time of your separation from service to be a “specified employee” for purposes of Section 409A, and if any of the payments upon separation from service set forth herein and/or under any other agreement with the Company are deemed to be “deferred compensation”, then to the extent delayed commencement of any portion of such payments is required in order to avoid a prohibited distribution under Section 409A and the related adverse taxation under Section 409A, such payments shall not be provided to you prior to the earliest of (i) the expiration of the six-month period measured from the date of your separation from service, (ii) the date of your death or (iii) such earlier date as permitted under Section 409A without the imposition of adverse taxation. If the release revocation period spans two calendar years, payments will commence in the second of those two calendar years to the extent required to comply with Section 409A. Please confirm your assent to the foregoing terms and conditions of our Agreement by signing and returning a copy of this letter to me. Sincerely, Sientra, Inc. By: /s/ Matthew Pigeon Matthew Pigeon (Printed Name) Title: Chief Financial Officer Having read and reviewed the foregoing, I hereby agree to and accept the terms and conditions of this Agreement as stated above. /s/ Joel Smith Joel Smith December 7, 2015 Date [Signature Page to Separation Agreement – Joel Smith] Sientra, Inc. Inducement Plan Adopted by the Bo ard of Directors :   March 7 , 2016 1.  General. (a)  Eligible  Stock  Award  Recipients.  The only persons eligible to receive grants of Stock Awards under this Plan are individuals who satisfy the standards for inducement grants under NASDAQ Marketplace Rule 5635(c)(4) and the related guidance under NASDAQ IM 5635-1 . A person who previously served as an Employee or Director will not be eligible to receive Stock Awards under the Plan, other than following a bona fide period of non-employment. Person s eligible to receive grants of Stock Awards under this Plan are referred to in this Plan as “ Eligible Employees ”. These Stock Awards must be approved by either a majority of the Company's “ Independent Directors ” (as such term is defined in NASDAQ Listing Rule 5605(a)(2) ) or the Company’s compensation committee, provided such committee is comp rised solely of Independent Directors (the “ Independent Compensation Committee ”) in order to comply with the exemption from the stockholder approval requirement for “inducement grants” provided under Rule 5635(c)(4) of the NASDAQ Listing Rules. NASDAQ Marketplace Rule 5635(c)(4) and the related guidance under NASDAQ IM 5635-1 are referred to in this Plan as the “ Inducement Award Rules ”. (b)  Available  Awards.  The Plan provides for the grant of Options and Restricted Stock Unit Awards . All Options will be Nonstatutory Stock Options. A wards intended to qualify as stockholder-approved performance based compensation for purposes of Section 162(m) of the Code may not be granted under this Plan. (c)  Purpose.  Th is Plan, through the granting of Stock Awards, is intended to provide (i) an inducement material for certain individuals to enter into employment with the Company within the meaning of Rule 5635(c)(4) of the NASDAQ Listing Rules , (ii) incentives for such persons to exert maximum efforts for the success of the Company and any Affiliate and (iii) a means by which Eligible Employees may be given an opportunity to benefit from increases in value of the Common Stock through the granting of Stock Awards. 2.  Administration. (a)  Administration by Board.  The Board will administer the Plan, provided, however, that Stock Awards may only be granted by either (i) a majority of the Company's Independent Directors or (ii) the Independent Compensation Committee . Subject to those constraints and the other constraints of the Inducement Award Rules, the Board may delegate some of its powers of administration of the Plan to a Committee, as provided in Section 2 (c). (b)  Powers  of  Board.  The Board will have the power, subject to, and within the limitations of, the express provisions of the Plan and the Inducement Award Rules : 1 . (i)  To determine : (A ) who will be granted Stock Awards ; (B ) when and how e ach Stock Award will be granted ; (C ) what type of Stock Award will be granted ; (D ) the provisions of each Stock Award (which need not be identical), including when a person will be permitted to exercise or otherwise receive cash or Com mon Stock under the Stock Award ; (E ) the number of shares of Common Stock subject to , or the cash value of, a Stock Award ; and (F) the Fair Market Value applicable to a Stock Award ; provided, however, that Stock Awards may only be granted by either (i) a majority of the Company's Independent Directors or (ii) the Independent Compensation Committee . (ii)  To construe and interpret the Plan and Stock Awards granted under it, and to establish, amend and revoke rules and regulations for administration of the Plan and Stock Awards . The Board, in the exercise of these powers, may correct any defect, omission or inconsistency in the Plan or in any Stock Award Agreement, in a manner and to the extent it will deem necessary or expedient to make the Plan or Stock Award fully effective. (iii)  To settle all controversies regarding the Plan and Stock Awards granted under it. (iv)  To accelerate, in whole or in part, the time at which a Stock Award may be exercised or vest (or at which cash or shares of Common Stock may be issued). (v)  To suspend or terminate the Plan at any time. Except as otherwise provided in the Plan or a Stock Award Agreement, suspension or termination of the Plan will not materially impair a Participant’s rights under his or her then-outstanding Stock Award without his or her written consent except as provided in subsection (viii) below. (vi)  To amend the Plan in any respect the Board deems necessary or advisable, including, without limitation, adopting amendments relating to nonqualified deferred compensation under Section 409A of the Code and/or making the Plan or Stock Award s granted under the Plan exempt from or compliant with the requirements for nonqualified deferred compensation under Section 409A of the Code , subject to the limitations, if any, of applicable law. I f required by applicable law or listing requirements , and except as provided in Section 9(a) relating to Capitalization Adjustments, the Company will seek stockholder approval of any amendment of the Plan that (A) materially increases the number of shares of Common Stock available for issuance under the Plan, (B) materially expands the class of individuals eligible to receive Stock Awards under the Plan, (C) materially increases the benefits accruing to Participants under the Plan, (D ) materially reduces the price at which shares of Common Stock may be issued or purchased under the Plan, (E) materially extends the term of the Plan, or (F) materially expands the types of Stock Awards available for issuance under the Plan. Except as otherwise provided in the Plan (including subsection (viii) below) or a Stock Award Agreement, no amendment of the Plan will materially impair a Participant’s rights under an outstanding Stock Award without the Participant’s written consent. (vii)  To submit any amendment to the Plan for stockholder approval, including, but not limited to, amendments to the Plan intended to satisfy the requirements of Rule 16b-3 of Exchange Act or any successor rule . 2 . (viii)  To approve forms of Stock Award Agreement s for use under the Plan and to amend the terms of any one or more outstanding Stock Award s, including, but not limited to, amendments to provide terms more favorable to the Participant than previously provided in the Stock Award Agreement, subject to any specified limits in the Plan that are not subject to Board discretion . A Participant’s rights under any Stock Award will not be impaired by any such amendment unless the Company requests the consent of the affected Participant, and the Participant consents in writing. However, a Participant’s rights will not be deemed to have been impaired by any such amendment if the Board, in its sole discretion, determines that the amendment, taken as a whole, does not materially impair the Participant’s rights . In addition, subject to the limitations of applicable law, if any, the Board may amend the terms of any one or more Stock Awards without the a ffected Participant’s consent ( A ) to clarify the manner of exemption from, or to bring the Stock Award int o compliance with, Section 409A of the Code , or ( B ) to comply with other applicable laws or listing requirements . (ix)  Generally, to exercise such powers and to perform such acts as the Board deems necessary or expedient to promote the best interests of the Company and that are not in conflict with the provisions of the Plan and/ or Stock Award Agreement s . (x)  To adopt such procedures and sub-plans as are necessary or appropriate (A) to permit participation in the Plan by individuals who are foreign nationals or employed outside the United States or (B) allow Stock Awards to qualify for special tax treatment in a foreign jurisdiction; provided that Board approval will not be necessary for immaterial modifications to the Plan or any Stock Award Agreement that are required for compliance with the laws of the relevant forei gn jurisdiction . (xi)  To effect, with the consent of any adversely affected Participant, (A ) the reduction of the exercise price of any outstanding Option ; (B ) the cancellation of any outstanding Stock Award and the grant in substitution therefore of a new (1 ) Option (2 ) Restricted Stock Unit Award, ( 3 ) cash award and/or ( 4 ) award of other valuable consideration determined by the Board, in its sole discretion, with any such substituted award (x ) covering the same or a different number of shares of Common Stock as the cancelled Stock Award and (y ) granted under the Plan or another equity or c ompensatory plan of the Company ; or (C ) any other action that is treated as a repricing under generally accepted accounting principles. (c)  Delegation to Committee.  (i)  General.   The Board may delegate some or all of the administration of the Plan to a Committee or Committees. If administration of the Plan is delegated to a Committee, the Committee will have, in connection with the administration of the Plan, the powers theretofore possessed by the Board that have been delegated to the Committee, including the power to delegate to a subcommittee of the Committee any of the administrative powers the Committee is authorized to exercise (and references in this Plan to the Board will thereafter be to the Committee or subcommittee). Any delegation of administrative powers will be reflected in resolutions, not inconsistent with the provisions of the Plan, adopted from time to time by the Board or Committee (as applicable). The Committee may, at any time, abolish the subcommittee and/or revest in the Committee any powers delegated to the subcommittee. The Board may retain the authority to 3 . concurrently administer the Plan with the Committee and may, at any time, revest in the Board some or all of the powers previously delegated. (ii)  Rule 16b-3 Compliance.  The Committee may consist solely of two or more Non-Employee Directors, in accordance with Rule 16b-3 of the Exchange Act . (d)  Effect  of  Board’s  Decision.  All determinations, interpretations and constructions made by the Board in good faith will not be subject to review by any person and will be final, binding and conclusive on all persons. 3.  Shares Subject to the Plan. (a)  Share Reserve . (i)  Subject to Section 9(a) relating to Capitalization Adjustments, the aggregate number of shares of Common Stock that may be issued pursuant to Stock Awards will not exceed 180,000 shares (the “ Share Reserve ”) . (ii)  For clarity, the Share Reserve is a limitation on the number of shares of Common Stock that may be issued under to the Plan. A s a single share may be subject to grant more than once ( e.g. , if a share subject to a Stock Award is forfeited, it may be made subject to grant again as provided in Section 3(b) below), the Share Reserve is not a limit on the number of Stock Awards that can be granted . (iii)  Shares may be issued under the terms of this Plan in connection with a merger or acquisition as permitted by NASDAQ Listing Rule 5635(c), NYSE Listed Company Manual Section 303A.08, AMEX Company Guide Section 711 or other applicable rule, and such issuance will not reduce the number of shares available for issuance under the Plan. (b)  Reversion of Shares to the Share Reserve . If a Stock Award or any portion of a Stock Award (i) expires or otherwise terminates without all of the shares covered by the Stock Award having been issued or (ii) is settled in cash ( i.e. , the Participant receives cash rather than stock), such expiration, termination or settlement will not reduce (or otherwise offset) the number of shares of Common Stock that are available for issuance under the Plan. If any shares of Common Stock issued under a Stock Award are forfeited back to or repurchased by the Company because of the failure to meet a contingency or condition required to vest such shares in the Participant, then the shares that are forfeited or repurchased will revert to and again become available for issuance under the Plan. Any shares reacquired by the Company in satisfaction of tax withholding obligations on a Stock Award or as consideration for the exercise or purchase price of a Stock Award will again become available for issuance under the Plan. (c)  Source of Shares.  The stock issuable under the Plan will be shares of authorized but unissued or reacquired Common Stock, including shares repurchased by the Company on the open market or otherwise. 4 . 4.  Eligibility. (a)  Eligibility  for  Specific  Stock  Awards  .  Stock Awards may only be granted to persons who are Eligible Employees described in Section 1(a) of the Plan, where the Stock Award is an inducement material to the individual’s entering into employment with the Company or an Affiliate within the meaning of Rule 5635(c)(4) of the NASDAQ Listing Rules, provided however , that Stock Awards may not be granted to Eligible Employees who are providing Continuous Service only to any “parent” of the Company, as such term is defined in Rule 405 of the Securities Act , unless (i) the stock underlying such Stock Awards is treated as “service recipient stock” under Section 409A of the Code (for example, because the Stock Awards are granted pursuant to a corporate transaction such as a spin off transaction), or (ii) the Company, in consultation with its legal counsel, has determined that such Stock Awards are otherwise exempt from or comply with the distribution requirements of Section 409A of the Code . (b)  Approval Requirements.  All Stock Awards must be granted either by a majority of the Company’s independent directors or the Independent Compensation Committee . 5.  Provisions Relating to Options. Each Option will be in such form and will contain such terms and conditions as the Board deems appropriate. All Options will be Nonstatutory Stock Options. The provisions of separate Options need not be identical; provided, however , that each Option Agreement will conform to (through incorporation of provisions hereof by reference in the applicable Option Agreement or otherwise) the substance of each of the following provisions: (a)  Term.  No Option will be exercisable after the expiration of 10 years from the date of its grant or such shorter period specified in the Option Agreement. (b)  Exercise  Price.  The exercise or strike price of each Option will be not less than 100% of the Fair Market Value of the Common Stock subject to the Option on the date the Option is granted. Notwithstanding the foregoing, an Option may be granted with an exercise price lower than 100% of the Fair Market Value of the Common Stock subject to the Option if such Option is granted pursuant to an assumption of or substitution for another option or stock appreciation right pursuant to a Corporate Transaction and in a manner consistent with the provisions of Section 409A of the Code. (c)  Purchase  Pr  ice  for  Options.  The purchase price of Common Stock acquired pursuant to the exercise of an Option may be paid, to the extent permitted by applicable law and as determined by the Board in its sole discretion, by any combination of the methods of payment set forth below. The Board will have the authority to grant Options that do not permit all of the following methods of payment (or otherwise restrict the ability to use certain methods) and to grant Options that require the consent of th e Company to use a particular method of payment. The permitted methods of payment are as follows: (i)  (ii)  by cash, check, bank draft or money order payable to the Company; pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board that, prior to the issuance of the stock subject to the Option, results in either 5 . the receipt of cash (or check) by the Company or the receipt of irrevocable instructions to pay the aggregate exercise price to the Company from the sales proceeds; (iii)  of Common Stock; by delivery to the Company (either by actual delivery or attestation) of shares (iv)  by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Common Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price; provided, however , that the Company will accept a cash or other payment from the Participant to the extent of any remaining balance of the aggregate exercise price not satisfied by such reduction in the number of whole shares to be issued. Shares of Common Stock will no longer be subject to an Option and will not be exercisable thereafter to the extent that (A) shares issuable upon exercise are used to pay the exercise price pursuant to the “net exercise,” (B) shares are delivered to the Participant as a result of such exercise, and (C) shares are withheld to satisfy tax withholding obligations; or (v)  in any other form of legal consideration that may be acceptable to the Board and specified in the applicable Option Agreement. (d)  Transferability  of  Options.  The Board may, in its sole discretion, impose such limitations on the transferability of Options as the Board will determine. In the absence of such a determination by the Board to the contrary, the following restrictions on the transferability of Options will apply: (i)  Restrictions on Transfer.  An Option will not be transferable except by will or by the laws of descent and distribution (or pursuant to subsections (ii) and (iii) below), and will be exercisable during the lifetime of the Participant only by the Participant. The Board may permit transfer of the Option in a manner that is not prohibited by applicable tax and securities laws. Except as explicitly provided in the Plan , an Option may not be transferred for consideration. (ii)  Domestic Relations Orders.  Subject to the approval of the Board or a duly authorized Officer, an Option may be transferred pursuant to the terms of a domestic relations order, official marital settlement agreement or other divorce or separation instrument . (iii)  Beneficiary  Designation.  Subject to the approval of the Board or a duly authorized Officer, a Participant may, by delivering written notice to the Company, in a form approved by the Company (or the designated broker), designate a third party who, on the death of the Participant, will thereafter be entitled to exercise the Option and receive the Common Stock or other consideration resulting from such exercise. In the absence of such a designation, the executor or administrator of the Participant’s estate will be entitled to exercise the Option and receive the Common Stock or other consideration resulting from such exercise. However, the Company may prohibit designation of a beneficiary at any time, including due to any conclusion by the Company that such designation would be inconsistent with the provisions of applicable laws. (e)  Vesting  Generally.  The total number of shares of Common Stock subject to an Option may vest and therefore become exercisable in periodic installments that may or may not be equal. The Option may be subject to such other terms and conditions on the time or times when it 6 . may or may not be exercised (which may be based on the satisfaction of performance goals or other criteria) as the Board may deem appropriate. The vesting provisions of individual Options may vary. The provisions of this Section 5(e) are subject to any Option provisions governing the minimum number of shares of Common Stock as to which an Option may be exercised. (f)  Termination  of  Continuous  Service.  Except as otherwise provided in the applicable Option Agreement or other agreement between the Participant and the Company, if a Participant’s Continuous Service terminates (other than for Cause and other than upon the Participant’s death or Disability), the Participant may exercise his or her Option (to the extent that the Participant was entitled to exercise such Option as of the date of termination of Continuous Service) within the period of time ending on the earlier of (i) the date which occurs ninety (90) days following the termination of the Participant’s Continuous Service , and (ii) the expiration of the term of the Option as set forth in the Option Agreement. If, after termination of Continuous Service, the Participant does not exercise his or her Option within the applicable time frame, the Option will terminate. (g)  Extension  of  Termination  Date.  Except as otherwise provided in the applicable Stock Award Agreement , if the exercise of an Option following the termination of the Participant’s Continuous Service (other than for Cause and other than upon the Participant’s death or Disability) would be prohibited at any time solely because the issuance of shares of Common Stock would violate the registration requirements under the Securities Act, then the Option will terminate on the earlier of (i) the expiration of a total period of time (that need not be consecutive) equal to the applicable post - termination exercise period after the termination of the Participant’s Continuous Service during which the exercise of the Option would not be in violation of such registration requirements, and (ii) the expiration of the term of the Option as set forth in the applicable Option Agreement. In addition, unless otherwise provided in a Participant’s Option Agreement, if the sale of any Common Stock received up on exercise of an Option following the termination of the Participant’s Continuous Service (other than for Cause) would violate the Company’s insider trading policy, then the Option will terminate on the earlier of (i) the expiration of a period of days or months (that need not be consecutive) equal to the applicable post-termination exercise period after the termination of the Participant’s Continuous Service during which the sale of the Common Stock received upon exercise of the Option would not be in violation of the Company’s insider trading policy, or (ii) the expiration of the term of the Option as set forth in the applicable Option Agreement. (h)  Disability  of  Participant.  Except as otherwise provided in the applicable Option Agreement or other agreement between the Participant and the Company, if a Participant’s Continuous Service terminates as a result of the Participant’s Disability, the Participant may exercise his or her Option (to the extent that the Participant was entitled to exercise such Option as of the date of termination of Continuous Service), but only within such period of time ending on the earlier of (i) the date 12 months following such te rmination of Continuous Service and (ii) the expiration of the term of the Option as set forth in the Option Agreement. If, after termination of Continuous Service, the Participant does not exercise his or her Option within the applicable time frame, the Option will terminate. (i)  Death  of  Participant.  Except as otherwise provided in the applicable Option Agreement or other agreement between the Participant and the Company, if (i) a Participant’s 7 . Continuous Service terminates as a result of the Participant’s death, or (ii) the Participant dies within the period (if any) specified in the Option Agreement for exercisability after the termination of the Participant’s Continuous Service for a reason other than death, then the Option may be exercised (to the extent the Participant was entitled to exercise such Option as of the date of death) by the Participant’s estate, by a person who acquired the right to exercise the Option by bequest or inheritance or by a person designated to exercise the Option upon the Participant’s death, but only within the period ending on the earlier of (i) the date 18 months following the date of death , and (ii) the expiration of the term of such Option as set forth in the Option Agreement. If, after the Participant’s death, the Option is not exercised within the applicable time frame, the Option will terminate. (j)  Termination for Cause.   Except as explicitly provided otherwise in a Participant’s Stock Award Agreement or other individual written agreement between the Company or any Affiliate and the Participant, if a Participant’s Continuous Service is terminated for Cause, the Option will terminate upon the date on which the event giving rise to the termination for Cause first occurred, and the Participant will be prohibited from exercising his or her Option from and after the date on which the event giving rise to the termination for Cause first occurred (or, if required by law, the date of termination of Continuous Service). If a Participant’s Continuous Service is suspended pending an investigation of the existence of Cause, all of the Participant’s rights under the Option will also be suspended during the investigation period. (k)  Non-Exempt  Employees  . If an Option is granted to an Employee who is a non- exempt employee for purposes of the Fair Labor Standards Act of 1938, as amended, the Option will not be first exercisable for any shares of Common Stock until at least 6 months following the date of grant of the Option (although the Option may vest prior to such date). Consistent with the provisions of the Worker Economic Opportunity Act, (i) if such non-exempt Employee dies or suffers a Disability, (ii) upon a Corporate Transaction in which such Option is not assumed, continued, or substituted, (iii) upon a Change in Control, or (iv) upon the non-exempt Employee ’s retirement (as such term may be defined in the non-exempt Employee’s Option Agreement in another agreement between the non-exempt Employee and the Company, or, if no such definition, in accordance with the Company's then current employment policies and guidelines), the vested portion of any Options may be exercised earlier than 6 months following the date of grant. The foregoing provision is intended to operate so that any income derived by a non-exempt employee in connection with the exercise or vesting of an Option will be exempt from his or her regular rate of pay. To the extent permitted and/or required for compliance with the Worker Economic Opportunity Act to ensure that any income derived by a non-exempt E mployee in connection with the exercise, vesting or issuance of any shares under any other Option will be exempt from such E mployee’s regular rate of pay, the provisions of this paragraph will apply to all Options and are hereby incorporated by reference into such Option Agreements. 6.  Provisions Relating to Restricted Stock Unit Awards. Each Restricted Stock Unit Award Agreement will be in such form and will contain such terms and conditions as the Board deems appropriate. The terms and conditions of Restricted Stock Unit Award Agreements may change from time to time, and the terms and conditions of separate Restricted Stock Unit Award Agreements need not be identical. Each Restricted Stock Unit Award 8 . Agreement will conform to (through incorporation of the provisions hereof by reference in the Agreement or otherwise) the substance of each of the following provisions: (a)  Consideration.  At the time of grant of a Restricted Stock Unit Award, the Board will determine the consideration, if any, to be paid by the Participant upon delivery of each share of Common Stock subject to the Restricted Stock Unit Award. The consideration to be paid (if any) by the Participant for each share of Common Stock subject to a Restricted Stock Unit Award may be paid in any form of legal consideration that may be acceptable to the Board , in its sole discretion , and permissible under applicable law. (b)  Vesting.   At the time of the grant of a Restricted Stock Unit Award, the Board may impose such restrictions on or conditions to the vesting of the Restricted Stock Unit Award as it, in its sole discretion, deems appropriate. (c)  Payment . A Restricted Stock Unit Award may be settled by the delivery of shares of Common Stock, their cash equivalent, any combination thereof or in any other form of consideration, as determined by the Board and contained in the Restricted Stock Unit Award Agreement. (d)  Additional Restrictions.   At the time of the grant of a Restricted Stock Unit Award, the Board, as it deems appropriate, may impose such restrictions or conditions that delay the delivery of the shares of Common Stock (or their cash equivalent) subject to a Restricted Stock Unit Award to a time after the vesting of such Restricted Stock Unit Award. (e)  Dividend Equivalents.   Dividend equivalents may be credited in respect of shares of Common Stock covered by a Restricted Stock Unit Award, as determined by the Board and contained in the Restricted Stock Unit Award Agreement. At the sole discretion of the Board, such dividend equivalents may be converted into additional shares of Common Stock covered by the Restricted Stock Unit Award in such manner as determined by the Board. Any additional shares covered by the Restricted Stock Unit Award credited by reason of such dividend equivalents will be subject to all of the same terms and conditions of the underlying Restricted Stock Unit Award Agreement to which they relate. (f)  Termination of Participant’s Continuous Service.   Except as otherwise provided in the applicable Restricted Stock Unit Award Agreement, such portion of the Restricted Stock Unit Award that has not vested will be forfeited upon the Participant’s termination of Continuous Service. 7.  Covenants of the Company. (a)  Availability of Shares.  The Company will keep available at all times the number of shares of Common Stock reasonably required to satisfy then-outstanding Stock Awards. (b)  Securities  Law  Compliance.  The Company will seek to obtain from each regulatory commission or agency having jurisdiction over the Plan such authority as may be required to grant Stock Awards and to issue and sell shares of Common Stock upon exercise of the Stock Awards; provided, however, that this undertaking will not require the Company to register under the Securities Act the Plan, any Stock Award or any Common Stock issued or 9 .   issuable pursuant to any such Stock Award. If, after reasonable efforts and at a reasonable cost, the Company is unable to obtain from any such regulatory commission or agency the authority that counsel for the Company deems necessary for the lawful issuance and sale of Common Stock under the Plan, the Company will be relieved from any liability for failure to issue and sell Common Stock upon exercise of such Stock Awards unless and until such authority is obtained. A Participant will not be eligible for the grant of a Stock Award or the subsequent issuance of cash or Common Stock pursuant to the Stock Award if such grant or issuance would be in violation of any applicable securities law. (c)  No Obligation to Notify or Minimize Taxes.   The Company will have no duty or obligation to any Participant to advise such holder as to the time or manner of exercising such Stock Award. Furthermore, the Company will have no duty or obligation to warn or otherwise advise such holder of a pending termination or expiration of a Stock Award or a possible period in which the Stock Award may not be exercised. The Company has no duty or obligation to minimize the tax consequences of a Stock Award to the holder of such Stock Award . 8.  Miscellaneous. (a)  Use of Proceeds from Sales of Common Stock.   Proceeds from the sale of shares of Common Stock pursuant to Stock Awards will constitute general funds of the Company. (b)  Corporate  Act  ion  Constituting  Grant  of  Stock  Awards.  Corporate action constituting a grant by the Company of a Stock Award to any Participant will be deemed completed as of the date of such corporate action, unless otherwise determined by the Board, regardless of when the instrument, certificate, or letter evidencing the Stock Award is communicated to, or actually received or accepted by, the Participant. In the event that the corporate records ( e.g. , Board consents, resolutions or minutes) documenting the corporate action constituting the grant contain terms ( e.g. , exercise price, vesting schedule or number of shares) that are inconsistent with those in the Stock Award Agreement as a result of a clerical error in the papering of the Stock Award Agreement, the corporate records will control and the Participant will have no legally binding right to the incorrect term in the Stock Award Agreement. (c)  Stockholder Rights.  No Participant will be deemed to be the holder of, or to have any of the rights of a holder with respect to, any shares of Common Stock subject to a Stock Award unless and until (i) such Participant has satisfied all requirements for exercise of, or the issuance of shares of Common Stock under, the Stock Award pursuant to its terms, and (ii) the issuance of the Common Stock subject to such Stock Award has been entered into the books and records of the Company. (d)  No Employment or Other Service Rights.  Nothing in the Plan, any Stock Award Agreement or any other instrument executed thereunder or in connection with any Stock Award granted pursuant thereto will confer upon any Participant any right to continue to serve the Company or an Affiliate in the capacity in effect at the time the Stock Award was granted or will affect the right of the Company or an Affiliate to terminate (i) the employment of an Employee with or without notice and with or without cause , including, but not limited to, Cause , (ii) the service of a Consultant pursuant to the terms of such Consultant’s agreement with the Company or an Affiliate, or (iii) the service of a Director pursuant to the bylaws of the Company or an 10 . Affiliate, and any applicable provisions of the corporate law of the state in which the Company or the Affiliate is incorporated, as the case may be. (e)  Change in Time Commitment  . In the event a Participant’s regular level of time commitment in the performance of his or her services for the Company and any Affiliates is reduced (for example, and without limitation, if the Participant is an Employee of the Company and the Employee has a change in status from a full-time Employee to a part-time Employee or takes an extended leave of absence ) after the date of grant of any Stock Award to the Participant, the Board has the ri ght in its sole discretion to ( i ) make a corresponding reduction in the number of shares or cash amount subject to any portion of such Stock Award that is scheduled to vest or become payable after the date of such c hange in time commitment, and ( ii ) in lieu of or in combination with such a reduction, extend the vesting or payment schedule applicable to such Stock Award . In the event of any such reduction, the Participant will have no right with respect to any portion of the Stock Award that is so reduced or extended. (f)  Investment Assurances.  The Company may require a Participant, as a condition of exercising or acquiring Common Stock under any Stock Award, (i) to give written assurances satisfactory to the Company as to the Participant’s knowledge and experience in financial and business matters and/or to employ a purchaser representative reasonably satisfactory to the Company who is knowledgeable and experienced in financial and business matters and that he or she is capable of evaluating, alone or together with the purchaser representative, the merits and risk s of exercising the Stock Award, and (ii) to give written assurances satisfactory to the Company stating that the Participant is acquiring Common Stock subject to the Stock Award for the Participant’s own account and not with any present intention of selling or otherwise distributing the Common Stock. The foregoing requirements, and any assurances given pursuant to such requirements, will be inoperative if (i ) the issuance of the shares upon the exercise of a Stock Award or acquisition of Common Stock under the Stock Award has been registered under a then currently effective registration statement under the Securities Act, or (ii ) as to any particular requirement, a determination is made by counsel for the Company that such requirement need not be met in the circumstances under the then applicable securities laws. The Company may, upon advice of counsel to the Company, place legends on stock certificates issued under the Plan as such counsel deems necessary or appropriate in order to comply with applicable securities laws, including, but not limited to, legends restricting the transfer of the Common Stock. (g)  Withholding  Obligations.  Unless prohibited by the terms of a Stock Award Agreement, the Company may, in its sole discretion, satisfy any U.S. federal, state, local , foreign or other tax withholding obligation relating to a Stock Award by any of the following means or by a combination of such means: (i) causing the Participant to tender a cash payment; (ii) withholding shares of Common Stock from the shares of Common Stock issued or otherwise issuable to the Participant in connection with the Stock Award ; provided, however , that no shares of Common Stock are withheld with a value exceeding the minimum amount of tax required to be withheld by law (or such other amount as may be necessary to avoid classification of the Stock Award as a liability for financial accounting purposes); (iii) withholding cash from a Stock Award settled in cash; (iv) withholding payment from any amounts otherwise payable to the Participant , including proceeds from the sale of shares of Common Stock issued pursuant to a Stock Award ; or (v) by such other method as may be set forth in the Stock Award Agreement. 11 . (h)  Electronic Delivery . Any reference herein to a “written” agreement or document will include any agreement or document delivered electronically , filed publicly at www.sec.gov (or any successor website thereto), or posted on the Company’s intranet (or other shared electronic medium controlled by the Company to which the Participant has access). (i)  Deferrals.  To the extent permitted by applicable law, the Board, in its sole discretion, may determine that the delivery of Common Stock or the payment of cash, upon the exercise, vesting or settlement of all or a portion of any Stock Award may be deferred and may establish programs and procedures for deferral elections to be made by Participants. Deferrals by Participants will be made in accordance with Section 409A of the Code (to the extent applicable to a Participant) . Consistent with Section 409A of the Code , the Board may provide for distributions while a Participant is still an employee or otherwise providing services to the Company. The Board is authorized to make deferrals of Stock Awards and determine when, and in what annual percentages, Participants may receive payments, including lump sum payments, following the Participant’s termination of Continuous Service, and implement such other terms and conditions consistent with the provisions of the Plan and in accordance with applicable law. (j)  Compliance with Section 409A.   Unless otherwise expressly provided for in a Stock Award Agreement and the Plan will be interpreted to the greatest extent possible in a manner that makes the Plan and the Stock Award s granted hereunder exempt from Section 409A of the Code , and, to the extent not so exempt, in compliance with Section 409A of the Code . If the Board determines that any Stock Award granted hereunder is not exempt from and is therefore subject to Section 409A of the Code , the Stock Award Agreement evidencing such Stock Award will incorporate the terms and conditions necessary to avoid the consequences specified in Section 409A(a)(1) of the Code , and to the extent a Stock Award Agreement is silent on terms necessary for compliance, such terms are hereby incorporated by reference into the Stock Award Agreement. Notwithstanding anything to the contrary in this Plan ( and unless the Stock Award Agreement specifically provides otherwise), if the shares of Common Stock are publicly traded, and if a Participant holding a Stock Award that constitutes “deferred compensation” under Section 409A of the Code is a “specified employee” for purposes of Section 409A of the Code , no distribution or payment of any amount that is due because of a “separation from service” (as defined in Section 409A of the Code ) will be issued or paid before the date that is six (6) months following the date of such Participant’s “separation from service” or, if earlier, the date of the Participant’s death, unless such distribution or payment can be made in a manner that complies with Section 409A of the Code , and any amounts so deferred will be paid in a lump sum on the day after such six (6) month period elapses, with the balance paid thereafter on the original schedule. (k)  Clawback/Recovery.  All Stock Awards granted under the Plan will be subject to recoupment in accordance with any clawback policy that the Company is required to adopt pursuant to the listing standards of any national securities exchange or association on which the Company’s securities are listed or as is otherwise required by the Dodd-Frank Wall Street Reform and Consumer Protection Act or other applicable law. In addition, the Board may impose such other clawback, recovery or recoupment provisions in a Stock Award Agreement as the Board determines necessary or appropriate, including, but not limited to, a reacquisition right in respect of previously acquired shares of Common Stock or other cash or property upon the occurrence of an event constituting Cause. No recovery of compensation under such a clawback policy will be 12 . an event giving rise to a right to resign for “good reason” or “constructive termination” (or similar term) under any agreement with the Company or an Affiliate . 9.  Adjustments upon Changes in Common Stock; Other Corporate Events. (a)  Capitalization  Adjustments  . In the event of a Capitalization Adjustment, the Board will appropriately and proportionately adjust: (i) the class(es) and maximum number of securities subject to th e Plan pursuant to Section 3(a) and (ii) the class(es) and number of securities and price per share of stock subject to outstanding Stock Awards. The Board will make such adjustments, and its determination will be final, binding and conclusive. (b)  Dissolution  or  Liquidation  . Except as otherwise provided in the Stock Award Agreement, in the event of a dissolution or liquidation of the Company, all outstanding Stock Awards will terminate immediately prior to the completion of such dissolution or liquidation, and the shares of Common Stock subject to the Company’s repurchase rights or subject to a forfeiture condition may be repurchased or reacquired by the Company notwithstanding the fact that the holder of such Stock Award is providing Continuous Service; provided, however, that the Board may, in its sole discretion, cause some or all Stock Awards to become fully vested, exercisable and/or no longer subject to repurchase or forfeiture (to the extent such Stock Awards have not previously expired or terminated) before the dissolution or liquidation is completed but contingent on its completion. (c)  Corporate Transaction.    The following provisions will apply to Stock Awards in the event of a Corporate Transaction unless otherwise provided in the instrument evidencing the Stock Award or any other written agreement between the Company or any Affiliate and the Participant or unless otherwise expressly provided by the Board at the time of grant of a Stock Award. In the event of a Corporate Transaction, then, notwithstanding any other provision of the Plan, the Board will take one or more of the following actions with respect to Stock Awards, contingent upon the closing or completion of the Corporate Transaction: (i)  arrange for the surviving corporation or acquiring corporation (or the surviving or acquiring corporation’s parent company) to assume or continue the Stock Award or to substitute a similar stock award for the Stock Award (including, but not limited to, a Stock Award to acquire the same consideration paid to the stockholders of the Company pursuant to the Corporate Transaction); (ii)  arrange for the assignment of any reacquisition or repurchase rights held by the Company in respect of Common Stock issued pursuant to the Stock Award to the surviving corporation or acquiring corporation (or the surviving or acquiring corporation’s parent company); (iii)  accelerate the vesting, in whole or in part, of the Stock Award (and, if applicable, the time at which the Stock Award may be exercised) to a date prior to the effective time of such Corporate Transaction as the Board determine s (or, if the Board does not determine such a date, to the date that is five ( 5 ) days prior to the effective date of the Corporate Transaction), with such Stock Award terminating if not exercised (if applicable) at or prior to the effective time of the Corporate Transaction; 13 . (iv)  arrange for the lapse, in whole or in part, of any reacquisition or repurchase rights held by the Company with respect to the Stock Award; (v)  cancel or arrange for the cancellation of the Stock Award, to the extent not vested or not exercised prior to the effective time of the Corporate Transaction, in exchange for such cash consideration, if any, as the Board, in its sole discretion, may consider appropriate; and (vi)  make a payment, in such form as may be determined by the Board equal to the excess, if any, of (A) the value of the property the Participant would have received upon the exercise of the Stock Award immediately prior to the effective time of the Corporate Transaction, over (B) any exercise price payable by such holder in connection with such exercise. The Board need not take the same action or actions with respect to all Stock Awards or portions thereof or with respect to all Participants. The Board may take different actions with respect to the vested and unvested portions of a Stock Award. (d)  Change  in  Control.  A Stock Award may be subject to additional acceleration of vesting and exercisability upon or after a Change in Control as may be provided in the Stock Award Agreement for such Stock Award or as may be provided in any other written agreement between the Company or any Affiliate and the Participant, but in the absence of such provision, no such acceleration will occur. 10.  Termination or Suspension of the Plan. The Board may suspend or termi nate the Plan at any time. No Stock A wards may be granted under the Plan while the Plan is suspended or after it is terminated. 11.  Effective Date of Plan ; Timing of First Grant or Exercise . The Plan will come into existence on the Effective Date . N o Stock Award may be granted prior to the Effective Date. 12.  Choice of Law. The law s of the   State of Delaware will govern all questions concerning the construction, validity and interpretation of this Plan, without regard to that state’s conflict of laws rules. Definitions.     As used in the Plan, the following definitions will apply to the capitalized 13.  terms indicated below: (a)  “ Affiliate ” means, at the time of determination, any “parent” or “subsidiary” of the Company, as such terms are defined in Rule 405 of the Securities Act . The Board will have the authority to determine the time or times at wh ich “parent” or “ subsidiary” status is determined within the foregoing definition. (b)  “ Board ” means the Board of Directors of the Company. 14 . (c)  “ Capitalization Adjustment ” means any change that is made in, or other events that occur with respect to, the Common Stock subject to the Plan or subject to any Stock Award after the Effective Date without the receipt of consideration by the Company through merger, consolidation, reorganization, recapitalization, reincorporation, stock dividend, dividend in property other than cash, large nonrecurring cash dividend, stock split, reverse stock split, liquidating dividend, combination of shares, exchange of shares, change in corporate structure or other similar equity restructuring transaction, as that term is used in Financial Accounting Standards Board Accounting Standards Codification Topic 718 (or any successor thereto) . Notwithstanding the foregoing, the conversion of any convertible securities of the Company will not be treated as a Capitalization Adjustment. (d)  “ Cause ” will have the meaning ascribed to such term in any written agreement between the Participant and the Company or any Affiliate defining such term and, in the absence of such agreement, such term means, with respect to a Participant, the occurrence of any of the following events : (i ) Participant’s willful failure substantially to perform his or her duties and responsibilities to the Company or any Affiliate or deliberate violation of a policy of the Company or any Affiliate ; (ii ) Participant’s commission of any act of fraud, embezzlement, dishonesty or any other willful misconduct that has caused or is reasonably expected to result in material injury to the Company or an y Affiliate ; (iii ) unauthorized use or disclosure by Participant of any proprietary information or trade secrets of the Company or any other party to whom the Participant owes an obligation of nondisclosure as a result of his or her relationship with the Company or an y Affiliate ; or (iv ) Participant’s willful breach of any of his or her obligations under any written agreement or covenant with the Company or an y Affiliate . The determination as to whether a Participant is being terminated for Cause will be made in good faith by the Company and will be final and binding on the Participant. Any determination by the Company that the Continuous Service of a Participant was terminated with or without Cause for the purposes of outstanding Stock Award s held by such Participant will have no effect upon any determination of the rights or obligations of the Company , any Affiliate or such Participant for any other purpose. (e)  “ Change in Control ” means the occurrence, in a single transaction or in a series of related transactions, of any one or more of the following events: (i)  any Exchange Act Person becomes the Owner, directly or indirectly, of securities of the Company representing more than 50% of the combined voting power of the Company’s then outstanding securities other than by virtue of a merger, consolidation or similar transaction. Notwithstanding the foregoing, a Change in Control will not be deemed to occur (A ) on account of the acquisition of securities of the Company directly from the Company, (B ) on account of the acquisition of securities of the Company by an investor, any affiliate thereof or any other Exchange Act Person that acquires the Company’s securities in a transaction or series of related transactions the primary purpose of which is to obtain financing for the Company through the issuance of equity securities , or ( C ) solely because the level of Ownership held by any Exchange Act Person (the “ Subject Person ”) exceeds the designated percentage threshold of the outstanding voting securities as a result of a repurchase or other acquisition of voting securities by the Company reducing the number of shares outstanding, provided that if a Change in Control would occur (but for the operation of this sentence) as a result of the acquisition of voting securities by the Company, and after such share acquisition, the Subject Person becomes the Owner of any additional voting securities that, assuming the repurchase or other acquisition had not occurred, 15 . increases the percentage of the then outstanding voting securities Owned by the Subject Person over the designated percentage threshold, then a Change in Control will be deemed to occur;   (ii)  there is consummated a merger, consolidation or similar transaction involving (directly or indirectly) the Company and, immediately after the consummation of such merger, consolidation or similar transaction, the stockholders of the Company immediately prior thereto do not Own, directly or indirectly, either (A) outstanding voting securities representing more than 50% of the combined outstanding voting power of the surviving Entity in such merger, consolidation or similar transaction or (B) more than 50% of the combined outstanding voting power of the parent of the surviving Entity in such merger, consolidation or similar transaction, in each case in substantially the same proportions as their Ownership of the outstanding voting securities of the Company immedia tely prior to such transaction; (iii)  there is consummated a sale, lease, exclusive license or other disposition of all or substantially all of the consolidated assets of the Company and its Subsidiaries, other than a sale, lease, license or other disposition of all or substantially all of the consolidated assets of the Company and its Subsidiaries to an Entity, more than 50% of the combined voting power of the voting securities of which are Owned by stockholders of the Company in substantially the same proportions as their Ownership of the outstanding voting securities of the Company immediately prior to such sale, lease, license or other disposition; or (iv)  individuals who, on the Effective D ate, are members of the Board (the “ Incumbent Board ”) cease for any reason to constitute at least a majority of the members of the Board; provided, however, that if the appointment or election (or nomination for election) of any new Board member was approved or recommended by a majority vote of the members of the Incumbent Board then still in office, such new member will, for purposes of this Plan, be considered as a member of the Incumbent Board. Notwithstanding the foregoing definition or any other provision of this Plan, (A) t he term Change in Control will not include a sale of assets, merger or other transaction effected exclusively for the purpose of changing the domicile of the Company, and (B) the definition of Change in Control (or any analogous term) in an individual written agreement between the Company or any Affiliate and the Participant will supersede the foregoing definition with respect to Stock Awards subject to such agreement; provided, however, that if no definition of Change in Control or any analogous term is set forth in such an individual written agreement, the foregoing definition will apply. (f)  “ Code ” means the U.S. Internal Revenue Code of 1986, as amended, including any applicable regulations and guidance thereunder. (g)  “ Committee ” means a committee of one (1) or more Independent Directors to whom authority has been delegated by the Board in accordance with Section 2(c) . “ Common Stock ” means the common stock of the Company. “ Company ” means Sientra , Inc. , a Delaware corporation. (h)  (i)  16 .   (j)  “ Consultant ” means any person, including an advisor, who is (i) engaged by the Company or an Affiliate to render consulting or advisory services and is compensated for such services, or (ii) serving as a member of the board of directors of an Affiliate and is compensated for such services . However, service solely as a Director, or payment of a fee for such service, will not cause a Director to be considered a “Consultant” for purposes of the Plan. Notwithstanding the foregoing, a person is treated as a Consultant under this Plan only if a Form S-8 Registration Statement under the Securities Act is available to register either the offer or the sale of the Company’s securities to such person. (k)  “ Continuous Service ” means that the Participant’s service with the Company or an Affiliate, whether as an Employee, Director or Consultant, is not interrupted or terminated. A change in the capacity in which the Participant renders service to the Company or an Affiliate as an Employee, Consultant or Director or a change in the Entity for which the Participant renders such service, provided that there is no interruption or termination of the Participant’s service with the Company or an Affiliate, will not terminate a Participant’s Continuous Service . For example, a change in status from an Employee of the Company to a Consultant of an Affiliate or to a Director will not constitute an interruption of Continuous Service. I f the Entity for which a Participant is rendering services ceases to qualify as an Affiliate, as determined by the Board in its sole discretion, such Participant’s Continuous Service will be considered to have terminated on the date such Entity ceases to qualify as an Affiliate. To the extent permitted by law, the Board or the chief executive officer of the Company, in that party’s sole discretion, may determine whether Continuous Service will be considered interrupted in the case of (i ) any leave of absence approved by the Board or chief executive officer, including sick leave, military leave or any other personal leave, or (ii ) transfers between the Company, an Affiliate, or their successors. In addition, if required for exemption from or compliance with Section 409A of the Code , the determination of whether there has been a termination of Continuous Service will be made, and such term will be construed, in a manner that is consistent with the definition of “separation from service” as defined under Treasury Regulation Section 1.409A-1(h). A leave of absence will be treated as Continuous Serv ice for purposes of vesting in a Stock Award only to such extent as may be provided in the Company’s leave of absence policy, in the written terms of any leave of absence agreement or policy applicable to the Participant, or as otherwise required by law. (l)  “ Corporate Transaction ” means the consummation, in a single transaction or in a series of related transactions, of any one or more of the following events: (i)  a sale   or other disposition of all or substantially all, as determined by the Board in its sole discretion, of the consolidated assets of the Company and its Subsidiaries; (ii)  a sale or other disposition of at least 90 % of the outstanding securities of the Company; (iii)  is not the surviving corporation; or a merger, consolidation or similar transaction following which the Company (iv)  a merger, consolidation or similar transaction following which the Company is the surviving corporation but the shares of Common Stock outstanding immediately preceding the merger, consolidation or similar transaction are converted or exchanged by virtue of 17 . the merger, consolidation or similar transaction into other property, whether in the form of securities, cash or otherwise. (m)  “ Director ” means a member of the Board. Directors are not eligible to receive Stock Awards under the Plan with respect to their service in such capacity. (n)  “ Disability ” means, with respect to a Participant, the inability of such Participant to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment that can be expected to result in death or that has lasted or can be expected to last for a continuous period of not less than 12 months as provided in Se ctions 22(e)(3) and 409A(a)(2)(C )(i) of the Code, and will be determined by the Board on the basis of such medical evidence as the Board deems warranted under the circumstances. (o)  “ Effective Date ” means the date the Plan is approved by the Board. (p)  “ Employee ” means any person employed by the Company or an Affiliate. However, service solely as a Director, or payment of a fee for such services, will not cause a Director to be considered an “Employee” for purposes of the Plan. (q)  (r)  “ Entity ” means a corporation, partnership, limited liability company or other entity. “ Exchange Act ” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. (s)  “ Exchange Act Person ” means any natural person, Entity or “group” (within the meaning of Section 13(d) or 14(d) of the Exchange Act), except that “Exchange Act Person” will not include (i) the Company or any Subsidiary of the Company, (ii) any employee benefit plan of the Company or any Subsidiary of the Company or any trustee or other fiduciary holding securities under an employee benefit plan of the Company or any Subsidiary of the Company, (iii) an underwriter temporarily holding securities pursuant to a registered public offering of such securities, (iv) an Entity Owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their Ow nership of stock of the Company, or (v) any natural person, Entity or “group” (within the meaning of Section 13(d) or 14(d) of the Exchange Act) that, as of the Effective Date, is the Owner, directly or indirectly, of securities of the Company representing more than 50% of the combined voting power of the Company’s then outstanding securities. (t)  “ Fair Market Value ” means, as of any date, the value of the Common Stock determined as follows: (i)  If the Common Stock is listed on any established stock exchange or traded on any established market, the Fair Market Value of a share of Common Stock will be, unless otherwise determined by the Board, the closing sales price for such stock as quoted on such exchange or market (or the exchange or market with the greatest volume of trading in the Common Stock) on the date of determination, as reported in a source the Board deems reliable. 18 . (ii)  Unless otherwise provided by the Board, if there is no closing sales price for the Common Stock on the date of determination, then the Fair Market Value will be the closing selling price on the last preceding date for which such quotation exists. (iii)  In the absence of such markets for the Common Stock, the Fair Market Value will be determined by the Board in good faith and in a manner that complies with Sections 409A of the Code. (u)  “ Independent Director ” has the meaning set forth in Section 1(a) above. (v)  “ Non-Employee Director ” means a Director who either (i ) is not a current employee or officer of the Company or an Affiliate, does not receive compensation, either directly or indirectly, from the Company or an Affiliate for services rendered as a consultant or in any capacity other than as a Director (except for an amount as to which disclosure would not be required under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act (“ Regulation S-K ”)), does not possess an interest in any other transaction for which disclosure would be required under Item 404(a) of Regulation S-K, and is not engaged in a business relationship for which disclosure would be required pursuant to Item 404(b) of Regulation S-K; or (ii ) is otherwise considered a “non-employee director” for purposes of Rule 16b-3 of the Exchange Act . (w)  “ Nonstatutory Stock Option ” means any option granted pursuant to Section 4(b) of the Plan that does not qualify as an “incentive stock option” within the meaning of Section 422 of the Code. (x)  “ Officer ” means a person who is an officer of the Company within the meaning of Section 16 of the Exchange Act . (y)  “ Option ” means a Nonstatutory Stock Option to purchase shares of Common Stock granted pursuant to the Plan. (z)  “ Option Agreement ” means a written agreement between the Company and an Optionholder evidencing the terms and conditions of an Option grant. Each Option Agreement will be subject to the terms and conditions of the Plan. (aa)  “ Optionholder ” means a person to whom an Option is granted pursuant to the Plan or, if applicable, such other person who holds an outstanding Option. (bb)  “ Own ,” “ Owned ,” “ Owner ,” “ Ownership ”   means a person or Entity will be deemed to “Own,” to have “Owned,” to be the “Owner” of, or to have acquired “Ownership” of securities if such person or Entity, directly or indirectly, through any contract, arrangement, understanding, relationship or otherwise, has or shares voting power, which includes the power to vote or to direct the voting, with respect to such securities. (cc)  “ Participant ” means a person to whom a Stock Award is granted pursuant to the Plan or, if applicable, such other person who holds an outstanding Stock Award. (dd)  “ Plan ” means this   Sientra , Inc. Inducement Plan , as it may be amended . 19 . (ee)  “ Restricted Stock Unit Award ” means a right to receive shares of Common Stock which is granted pursuant to the terms and conditions of Section 6(b). (ff)  “ Restricted Stock Unit Award Agreement ” means a written agreement between the Company and a holder of a Restricted Stock Unit Award evidencing the terms and conditions of a Restricted Stock Unit Award grant. Each Restricted Stock Unit Award Agreement will be subject to the terms and conditions of the Plan. (gg)  “Rule 16b-3 ” means Rule 16b-3 promulgated under the Exchange Act or any successor to Rule 16b-3, as in effect from time to time. (hh)  “ Securities Act ” means the Securities Act of 1933, as amended. (ii)  “Stock Award” means any right to receive Common Stock gran ted under the Plan, including an Option or a Restricted Stock Unit Award. (jj)  “ Stock Award Agreement ” means a written agreement between the Company and a Participant evidencing the terms and conditions of a Stock Award grant. Each Stock Award Agreement will be subject to the terms and conditions of the Plan. (kk)  “ Subsidiary ” means, with respect to the Company, (i ) any corporation of which more than 50% of the outstanding capital stock having ordinary voting power to elect a majority of the board of directors of such corporation (irrespective of whether, at the time, stock of any other class or classes of such corporation will have or might have voting power by reason of the happening of any contingency) is at the time, directly or indirectly, Owned by the Company, and (ii) any partnership, limited liability company or other entity in which the Company has a direct or indirect interest (whether in the form of voting or participation in profits or capital contribution) of more than 50% . Sientra, Inc.  Inducement Plan Stock Option Grant Notice Sientra, Inc. (the “ Company ”), pursuant to its Inducement Plan (the “ Plan ”), hereby grants to Optionholder an option to purchase the number of shares of the Company’s Common Stock set forth below. This option is subject to all of the terms and conditions as set forth in this notice, in the Option Agreement, the Plan and the Notice of Exercise, all of which are attached hereto and incorporated herein in their entirety. Capitalized terms not explicitly defined herein but defined in the Plan or the Option Agreement will have the same definitions as in the Plan or the Option Agreement. If there is any conflict between the terms in this notice and the Plan, the terms of the Plan will control. Optionholder: Date of Grant: Vesting Commencement Date: Number of Shares Subject to Option: Exercise Price (Per Share): Total Exercise Price: Expiration Date: Type of Grant:  Nonstatutory Stock Option Exercise Schedule : Same as Vesting Schedule Vesting Schedule : [ _____________ ] Payment:  By one or a combination of the following items (described in the Option Agreement):   ☒ By cash, check, bank draft or money order payable to the Company ☒ Pursuant to a Regulation T Program if the shares are publicly traded ☒ By delivery of already-owned shares if the shares are publicly traded ☒ Subject to the Company’s consent at the time of exercise, by a “net exercise” arrangement Additional Terms/Acknowledgements: Optionholder acknowledges receipt of, and understands and agrees to, this Stock Option Grant Notice, the Option Agreement and the Plan. Optionholder acknowledges and agrees that this Stock Option Grant Notice and the Option Agreement may not be modified, amended or revised except as provided in the Plan.   Optionholder further acknowledges that as of the Date of Grant, this Stock Option Grant Notice, the Option Agreement, and the Plan set forth the entire understanding between Optionholder and the Company regarding this option award and supersede all prior oral and written agreements, promises and/or 20 . representations on that subject with the exception of (i) options previously granted and delivered to Optionholder, (ii) any compensation recovery policy that is adopted by the Company or is otherwise required by applicable law and (iii) any written employment or severance arrangement that would provide for vesting acceleration of this option upon the terms and conditions set forth therein. By accepting the Award, Optionholder acknowledges having received and read the Stock Option Grant Notice, the Option Award Agreement and the Plan and agrees to all of the terms and conditions set forth in these documents. Furthermore, by accepting this option, Optionholder consents to receive such documents by electronic delivery and to participate in the Plan through an online or electronic system established and maintained by the Company or another third party designated by the Company. Sientra, Inc.     Optionholder: By: Title: Date: Signature Signature Date: Attachments : Option Agreement, Inducement Plan   and Notice of Exercise 21 . Attachment I Option Agreement Sientra, Inc.  Inducement Plan Option Agreement  (Nonstatutory Stock Option) Pursuant to your Stock Option Grant Notice (“ Grant Notice ”) and this Option Agreement, Sientra, Inc. (the “ Company ”) has granted you an option under its Inducement Plan (the “ Plan ”) to purchase the number of shares of the Company’s Common Stock indicated in your Grant Notice at the exercise price indicated in your Grant Notice. The option is granted to you effective as of the date of grant set forth in the Grant Notice (the “ Date of Grant ”). The option is granted in compliance with NASDAQ Listing Rule 5635(c)(4) as a material inducement to you entering into employment with the Company. If there is any conflict between the terms in this Option Agreement and the Plan, the terms of the Plan will control. Capitalized terms not explicitly defined in this Option Agreement or in the Grant Notice but defined in the Plan will have the same definitions as in the Plan. The details of your option, in addition to those set forth in the Grant Notice and the Plan, are as follows: 1.  Vesting.  Subject to the provisions contained herein, your option will vest as provided in your Grant Notice. Vesting will cease upon the termination of your Continuous Service. 2.  Number  of  Shares  and  Exercise  Price.  The number of shares of Common Stock subject to your option and your exercise price per share in your Grant Notice will be adjusted for Capitalization Adjustments. 3.  Exercise Restriction for Non-Exempt Employees.  If you are an Employee eligible for overtime compensation under the Fair Labor Standards Act of 1938, as amended ( that is , a “ Non-Exempt Employee ”), and except as otherwise provided in the Plan, you may not exercise your option until you have completed at least six (6) months of Continuous Service measured from the Date of Grant, even if you have already been an employee for more than six (6) months. Consistent with the provisions of the Worker Economic Opportunity Act, you may exercise your option as to any vested portion prior to such six (6) month anniversary in the case of (i) your death or disability, (ii) a Corporate Transaction in which your option is not assumed, continued or substituted, (iii) a Change in Control or (iv) your termination of Continuous Service on your “retirement” (as defined in the Company’s benefit plans). 4.  Method  of  Payment.  You must pay the full amount of the exercise price for the shares you wish to exercise. You may pay the exercise price in cash or by check, bank draft or money order payable to the Company or in any other manner permitted by your Grant Notice, which may include one or more of the following: (a)  Provided that at the time of exercise the Common Stock is publicly traded, pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board     that, prior to the issuance of Common Stock, results in either the receipt of cash (or check) by the Company or the receipt of irrevocable instructions to pay the aggregate exercise price to the Company from the sales proceeds. This manner of payment is also known as a “broker-assisted exercise”, “same day sale”, or “sell to cover”. at (b)  the time of Provided that exercise the Common Stock is publicly traded, by delivery to the Company (either by actual delivery or attestation) of already- owned shares of Common Stock that are owned free and clear of any liens, claims, encumbrances or security interests, and that are valued at Fair Market Value on the date of exercise. “Delivery” for these purposes, in the sole discretion of the Company at the time you exercise your option, will include delivery to the Company of your attestation of ownership of such shares of Common Stock in a form approved by the Company. You may not exercise your option by delivery to the Company of Common Stock if doing so would violate the provisions of any law, regulation or agreement restricting the redemption of the Company’s stock. of (c)  the to the Subject of consent exercise, by a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Common Stock issued upon exercise of your option by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price. You must pay any remaining balance of the aggregate exercise price not satisfied by the “net exercise” in cash or other permitted form of payment. Shares of Common Stock will no longer be outstanding under your option and will not be exercisable thereafter if those shares (i) are used to pay the exercise price pursuant to the “net exercise,” (ii) are delivered to you as a result of such exercise, and (iii) are withheld to satisfy your tax withholding obligations. Company at time the 5.  Whole  Shares.  You may exercise your option only for whole shares of Common Stock. 6.  Securities Law Compliance.  In no event may you exercise your option unless the shares of Common Stock issuable upon exercise are then registered under the Securities Act or, if not registered, the Company has determined that your exercise and the issuance of the shares would be exempt from the registration requirements of the Securities Act. The exercise of your option also must comply with all other applicable laws and regulations governing your option, and you may not exercise your option if the Company determines that such exercise would not be in material compliance with such laws and regulations (including any restrictions on exercise required for compliance with Treas. Reg. 1.401(k)-1(d)(3), if applicable). 7.  Term.  You may not exercise your option before the Date of Grant or after the expiration of the option’s term. The term of your option expires, subject to the provisions of Section 5(h) of the Plan, upon the earliest of the following: (a)  giving rise to your termination of Continuous Service for Cause occurs (or, if required by law, the date of termination of Continuous Service for Cause); immediately upon the date on which the event (b)  Continuous after Service for any reason other than Cause,     your Disability or your death (except as otherwise provided in Section termination of sixty (60) your days the 1 . 7(d) below); provided , however , that if during any part of such sixty (60) day period your option is not exercisable solely because of the condition set forth in the section above relating to “Securities Law Compliance,” your option will not expire until the earlier of the Expiration Date or until it has been exercisable for an aggregate period of sixty (60) days after the termination of your Continuous Service; provided further, if during any part of such sixty (60) day period, the sale of any Common Stock received upon exercise of your option would violate the Company’s insider trading policy, then your option will not expire until the earlier of the Expiration Date or until it has been exercisable for an aggregate period of sixty (60) days after the termination of your Continuous Service during which the sale of the Common Stock received upon exercise of your option would not be in violation of the Company’s insider trading policy. Notwithstanding the foregoing, if (i) you are a Non-Exempt Employee, (ii) your Continuous Service terminates within six (6) months after the Date of Grant, and (iii) you have vested in a portion of your option at the time of your termination of Continuous Service, your option will not expire until the earlier of (x) the later of (A) the date that is seven (7) months after the Date of Grant, and (B) the date that is sixty (60) days after the termination of your Continuous Service, and (y) the Expiration Date; months Service due to your Disability (except as otherwise provided in Section 7(d)) below; termination of six (6) after the (c)  your Continuous (d)  six (6) months after your death if you die either during your Continuous Service or within thirty (30) days after your Continuous Service terminates for any reason other than Cause; (e)  the Expiration Date indicated in your Grant Notice; or (f)  the day before the tenth (10th) anniversary of the Date of Grant. 8.  Exercise. (a)  You may exercise the vested portion of option during its term by (i) delivering a Notice of Exercise (in a form designated by the Company) or completing such other documents and/or procedures designated by the Company for exercise and (ii) paying the exercise price and any applicable withholding taxes to the Company’s Secretary, stock plan administrator, or such other person as the Company may designate, together with such additional documents as the Company may then require. your (b)  By exercising your as a condition to any exercise of your option, the Company may require you to enter into an arrangement providing for the payment by you to the Company of any tax withholding obligation of the Company arising by reason of (i) the exercise of your option, (ii) the lapse of any substantial risk of forfeiture to which the shares of Common Stock are subject at the time of exercise, or (iii) the disposition of shares of Common Stock acquired upon such exercise. option you agree that, 9.  Transferability . Except as otherwise provided in this Section 9, your option is not transferable, except by will or by the laws of descent and distribution, and is exercisable during your life only by you. 2 . (a)   Certain Trusts . Upon receiving written permission from the Board or its duly authorized designee, you may transfer your option to a trust if you are considered to be the sole beneficial owner (determined under Section 671 of the Code and applicable state law) while the option is held in the trust. You and the trustee must enter into transfer and other agreements required by the Company. (b)    Domestic  Relations  Orders.  Upon receiving written permission from the Board or its duly authorized designee, and provided that you and the designated transferee enter into transfer and other agreements required by the Company, you may transfer your option pursuant to the terms of a domestic relations order, official marital settlement agreement or other divorce or separation instrument that contains the information required by the Company to effectuate the transfer. You are encouraged to discuss the proposed terms of any division of this option with the Company prior to finalizing the domestic relations order or marital settlement agreement to help ensure the required information is contained within the domestic relations order or marital settlement agreement. (c)  Beneficiary  Designation.  Upon receiving written permission from the Board or its duly authorized designee, you ma y, by delivering written notice to the Company, in a form approved by the Company and any broker d esignated by the Company to handle option exercises, designate a third party who, on your death, will thereafter be entitled to exercise this option and receive the Common Stock or other consideration resulting from such exercise. In the absence of such a designation, your executor or administrator of your estate will be entitled to exercise this option and receive, on behalf of your estate, the Common Stock or other consideration resulting from such exercise. 10.  Option  not  a  Service  Contract.  Your option is not an employment or service contract, and nothing in your option will be deemed to create in any way whatsoever any obligation on your part to continue in the employ of the Company or an Affiliate, or of the Company or an Affiliate to continue your employment. In addition, nothing in your option will obligate the Company or an Affiliate, their respective stockholders, boards of directors, officers or employees to continue any relationship that you might have as a Director or Consultant for the Company or an Affiliate. 11.  Withholding Obligations. (a)  At the time you exercise your in part, and at any time thereafter as requested by the Company, you hereby authorize withholding from payroll and any other amounts payable to you, and otherwise agree to make adequate provision for (including by means of a “same day sale” pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board to the extent permitted by the Company), any sums required to satisfy the federal, state, local and foreign tax withholding obligations of the Company or an Affiliate, if any, which arise in connection with the exercise of your option. in whole or option, (b)  Upon the Company, and compliance with any applicable legal conditions or restrictions, the Company may withhold from fully vested shares of Common Stock otherwise issuable to you upon the exercise of your option a number of whole shares of Common Stock having a Fair Market Value, determined by the Company as of approval request subject your and by to 3 .       the date of exercise, not in excess of the minimum amount of tax required to be withheld by law (or such lower amount as may be necessary to avoid classification of your option as a liability for financial accounting purposes). Notwithstanding the filing of such election, shares of Common Stock shall be withheld solely from fully vested shares of Common Stock determined as of the date of exercise of your option that are otherwise issuable to you upon such exercise. Any adverse consequences to you arising in connection with such share withholding procedure shall be your sole responsibility. (c)  may You tax withholding obligations of the Company and/or any Affiliate are satisfied. Accordingly, you may not be able to exercise your option when desired even though your option is vested, and the Company will have no obligation to issue a certificate for such shares of Common Stock or release such shares of Common Stock from any escrow provided for herein, if applicable, unless such obligations are satisfied. exercise option unless your not the 12.  Tax  Consequences  . You hereby agree that the Company does not have a duty to design or administer the Plan or its other compensation programs in a manner that minimizes your tax liabilities. You will not make any claim against the Company, or any of its Officers, Directors, Employees or Affiliates related to tax liabilities arising from your option or your other compensation. In particular, you acknowledge that this option is exempt from Section 409A of the Code only if the exercise price per share specified in the Grant Notice is at least equal to the “fair market value” per share of the Common Stock on the Date of Grant and there is no other impermissible deferral of compensation associated with the option. 13.  Notices.  Any notices provided for in your option or the Plan will be given in writing (including electronically) and will be deemed effectively given upon receipt or, in the case of notices delivered by mail by the Company to you, five (5) days after deposit in the United States mail, postage prepaid, addressed to you at the last address you provided to the Company. The Company may, in its sole discretion, decide to deliver any documents related to participation in the Plan and this option by electronic means or to request your consent to participate in the Plan by electronic means. By accepting this option, you consent to receive such documents by electronic delivery and to participate in the Plan through an on-line or electronic system established and maintained by the Company or another third party designated by the Company. 14.  Governing Plan Document.  Your option is subject to all the provisions of the Plan, the provisions of which are hereby made a part of your option, and is further subject to all interpretations, amendments, rules and regulations, which may from time to time be promulgated and adopted pursuant to the Plan. If there is any conflict between the provisions of your option and those of the Plan, the provisions of the Plan will control. In addition, your option (and any compensation paid or shares issued under your option) is subject to recoupment in accordance with The Dodd– Frank Wall Street Reform and Consumer Protection Act and any implementing regulations thereunder, any clawback policy adopted by the Company and any compensation recovery policy otherwise required by applicable law. 15.  Other Documents  . You hereby acknowledge receipt of and the right to receive a document providing the information required by Rule 428(b)(1) promulgated under the Securities Act, which includes the Plan prospectus. In addition, you acknowledge receipt of the 4 . Company’s policy permitting certain individuals to sell shares only during certain “window” periods and the Company’s insider trading policy, in effect from time to time. 16.  Effect  on  Other  Employee  Benefit  Plans  . The value of this option will not be included as compensation, earnings, salaries, or other similar terms used when calculating your benefits under any employee benefit plan sponsored by the Company or any Affiliate, except as such plan otherwise expressly provides. The Company expressly reserves its rights to amend, modify, or terminate any of the Company’s or any Affiliate’s employee benefit plans. 17.  Voting Rights . You will not have voting or any other rights as a stockholder of the Company with respect to the shares to be issued pursuant to this option until such shares are issued to you. Upon such issuance, you will obtain full voting and other rights as a stockholder of the Company. Nothing contained in this option, and no action taken pursuant to its provisions, will create or be construed to create a trust of any kind or a fiduciary relationship between you and the Company or any other person. 18.  Severability . If all or any part of this Option Agreement or the Plan is declared by any court or governmental authority to be unlawful or invalid, such unlawfulness or invalidity will not invalidate any portion of this Option Agreement or the Plan not declared to be unlawful or invalid. Any Section of this Option Agreement (or part of such a Section) so declared to be unlawful or invalid shall, if possible, be construed in a manner which will give effect to the terms of such Section or part of a Section to the fullest extent possible while remaining lawful and valid. 19.  Miscellaneous . (a)  your option will be transferable to any one or more persons or entities, and all covenants and agreements hereunder will inure to the benefit of, and be enforceable by the Company’s successors and assigns. obligations Company The under rights and the of (b)  documents or instruments necessary or desirable in the sole determination of the Company to carry out the purposes or intent of your option. You agree upon request any further to execute (c)  reviewed your option in its entirety, have had an opportunity to obtain the advice of counsel prior to executing and accepting your option, and fully understand all provisions of your option. You acknowledge and agree you have that (d)  applicable laws, rules, and regulations, and to such approvals by any governmental agencies or national securities exchanges as may be required. Option Agreement to all subject This will be (e)  All Plan and this Option Agreement will be binding on any successor to the Company, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation, or otherwise, of all or substantially all of the business and/or assets of the Company. Company under obligations the the of 5 . * * * This Option Agreement will be deemed to be signed by you upon the signing by you of the Grant Notice to which it is attached. 6 . Attachment II Inducement Plan Attachment III Notice of Exercise Notice Of Exercise Sientra, Inc. Attention: Stock Plan Administrator 420 South Fairview Avenue, Suite 200 Santa Barbara, CA 93117 Date: This constitutes notice to Sientra, Inc. (the “ Company ”) under my stock option that I elect to purchase the below number of shares of Common Stock of the Company (the “ Shares ”) for the price set forth below. Type of option: Stock option dated: Number of Shares as to which option is exercised: Certificates to be issued in name of: Total exercise price: Nonstatutory _______________ _______________ _______________ $______________ Cash payment delivered herewith: Value of ________ Shares delivered herewith: Value of ________ Shares pursuant to net exercise: $______________ $______________ $______________ Regulation T Program (cashless exercise): $______________ By this exercise, I agree (i) to provide such additional documents as you may require pursuant to the terms of the Sientra, Inc. Inducement Plan and (ii) to provide for the payment by me to you (in the manner designated by you) of your withholding obligation, if any, relating to the exercise of this option. Very truly yours, Signature Print Name Sientra, Inc. Restricted Stock Unit Award Grant Notice Inducement Plan Sientra, Inc. (the “ Company ”) hereby awards to Participant the number of Restricted Stock Units specified and on the terms set forth below (the “ Award” ). The Award is subject to all of the terms and conditions as set forth in this Restricted Stock Unit Grant Notice (the “ Grant Notice ”), in the Restricted Stock Unit Award Agreement (the “ Award Agreement ”) and in the Company’s Inducement Plan (the “ Plan ” ), all of which are attached hereto and incorporated herein in their entirety. Capitalized terms not explicitly defined herein but defined in the Plan or the Award Agreement shall have the meanings set forth in the Plan or the Award Agreement, as applicable. In the event of any conflict between the terms of this Grant Notice, the Award Agreement or the Plan, the terms of the Plan shall control. Participant: [Name] Date of Grant: Vesting Commencement Date [Date] [Date] Number Restricted Units:  of  Stock [_______] Settlement Date: One share of Common Stock of the Company will be issued for each Restricted Stock Unit (subject to any Capitalization Adjustment) that vests at the time set forth in Section 6 of the Award Agreement. Vesting Schedule: ________________________________________ Additional Terms/Acknowledgements:  Participant acknowledges receipt of, and understands and agrees to, this Restricted Stock Unit Grant Notice, the Restricted Stock Unit Agreement and the Plan. Participant acknowledges and agrees that this Restricted Stock Unit Grant Notice and the Restricted Stock Unit Agreement may not be modified, amended or revised except as provided in the Plan.   Participant further acknowledges that as of the Date of Grant, this Restricted Stock Unit Grant Notice, the Restricted Stock Unit Agreement, and the Plan set forth the entire understanding between Participant and the Company regarding this award and supersede all prior oral and written agreements, promises and/or representations on that subject with the exception of (i) restricted stock units previously granted and delivered to Participant, (ii) any compensation recovery policy that is adopted by the Company or is otherwise required by applicable law and (iii) any written employment or severance arrangement that would provide for vesting acceleration of this award upon the terms and conditions set forth therein. By accepting the Award, Participant acknowledges having received and read the Restricted Stock Unit Grant Notice, the Restricted Stock Unit Award Agreement and the Plan (the “ Grant Documents ”) and agrees to all of the terms and conditions set forth in these documents. Furthermore, by accepting this Award, Participant consents to receive such documents by electronic delivery and to participate in the Plan through an online or electronic system established and maintained by the Company or another third party designated by the Company. Your electronic signature may be indicated by following the instructions in Computershare’s website. Your electronic signature indicates your agreement to be bound by the terms of this Agreement. The Participant hereby accepts the Award subject to all of the terms and conditions of this Notice, the Award Agreement and the Plan. Participant consents to receive such documents by electronic delivery and to participate in the Plan through an on-line or electronic system established and maintained by the Company or another third party designated by the Company. SIENTRA, INC. PARTICIPANT By: Its: Signature Date Address ATTACHMENTS: Inducement Plan; Restricted Stock Unit Agreement and Plan Prospectus Sientra, Inc. Inducement Plan Restricted Stock Unit Award Agreement Pursuant to the Restricted Stock Unit Grant Notice (the “ Grant Notice ”) and this Restricted Stock Unit Award Agreement (the “ Award Agreement ”) and in consideration of your services, Sientra, Inc. (the “ Company ”) has awarded you a Restricted Stock Unit Award (the “ Award ”) under its Inducement Plan (the “ Plan ”) for the number of Restricted Stock Units indicated in the Grant Notice (the “ Stock Units ”) . The Award is granted in compliance with NASDAQ Listing Rule 5635(c)(4) as a material inducement to you entering into employ ment with the Company. Capitalized terms not explicitly defined in this Award Agreement or in the Grant Notice but defined in the Plan will have the same definitions as in the Plan. The details of your Award, in addition to those set forth in the Grant Notice and the Plan are as follows: 20.  Grant of the Award.     This Award represents your right to be issued on a future date one share of the Company’s Common Stock for each Stock Unit indicated in the Grant Notice that vests. As of the Date of Grant specified in the Grant Notice, the Company will credit to a bookkeeping account maintained by the Company for your benefit (the “ Account ”) the number of Stock Units subject to the Award. This Award was granted in consideration of your services to the Company. 21.  Vesting .  Subject to the provisions contained herein, your Award will vest, if at all, in accordance with the vesting schedule provided in the Grant Notice. Vesting will cease upon the termination of your Continuous Service for any reason. Upon such termination of your Continuous Service, any Stock Units credited to the Account that were not yet vested on the date of such termination will be forfeited at no cost to the Company and you will have no further right, title or interest in such Stock Units or the shares of Common Stock to be issued in respect of such portion of the Award. 22.  Number of Stock Units and Shares of Common Stock.  (a)  The Stock Units subject to your Award will be adjusted for Capitalization Adjustments, as provided in the Plan. (b)  Any additional other property that become subject to the Award pursuant to this Section 3 , if any, will be subject, in a manner determined by the Board, to the same forfeiture restrictions, restrictions on transferability, and time and manner of delivery as applicable to the other Stock Units and shares covered by your Award. and any shares, Stock Units cash or (c)  No of Common Stock will be created pursuant to this Section 3 . Except as provided in Section 7 or otherwise provided by the Company, any fraction of a share will be rounded down to the nearest whole share. fractional fractional shares shares rights for or 23.  Securities Law Compliance .  You will not be issued any Common Stock in respect of your Stock Units or other shares with respect to your Stock Units unless either (i) the shares are registered under the Securities Act, or (ii) the Company has determined that such issuance would be exempt from the registration requirements of the Securities Act. Your Award also must comply with all other applicable laws and regulations governing the Award, and you will not receive such shares if the Company determines that such receipt would not be in material compliance with such laws and regulations. 24.  Transferability.  Prior to the time that shares of Common Stock have been delivered to you, you may not transfer, pledge, sell or otherwise dispose of any portion of the Stock Units or the shares in respect of your Stock Units. For example, you may not use shares that may be issued in respect of your Stock Units as security for a loan, nor may you transfer, pledge, sell or otherwise dispose of such shares. This restriction on transfer will lapse upon delivery to you of shares in respect of your vested Stock Units. .  (a)    Death  Your Stock Units are not will and by the laws of descent and distribution. Upon receiving written permission from the Board or its duly authorized designee, you may, by delivering written notice to the Company, in a form provided by or otherwise satisfactory to the Company and any broker designated by the Company to effect transactions under the Plan, designate a third party who, in the event of your death, will thereafter be entitled to receive any distribution of Common Stock or other consideration to which you were entitled at the time of your death pursuant to this Award Agreement. In the absence of such a designation, your executor or administrator of your estate will be entitled to receive, on behalf of your estate, such Common Stock or other consideration. transferable other than by (b)    Domestic  Relations  Orders.  Upon receiving written permission from the Board or its duly authorized designee, and provided that you and the designated transferee enter into transfer and other agreements required by the Company, you may transfer your right to receive the distribution of Common Stock or other consideration under your Stock Units, pursuant to the terms of a domestic relations order, official marital settlement agreement or other divorce or separation instrument as permitted by applicable law that contains the information required by the Company to effectuate the transfer. You are encouraged to discuss with the Company the proposed terms of any such transfer prior to finalizing the domestic relations order or marital settlement agreement to help ensure the required information is contained within the domestic relations order, marital settlement agreement or other divorce or separation instrument. The Company is not obligated to allow you to transfer your Award in connection with your domestic relations order, marital settlement agreement or other divorce or separation instrument. 25.  Date of Issuance.     (a)  To from the that application of Section 409A of the Code, the issuance of shares in respect of the Stock Units is intended to comply with Treasury Regulation Section 1.409A-1(b)(4) and will be construed and administered in such a manner. exempt Award extent your the is (b)  set forth in Section 10 of this Award Agreement, in the event one or more Stock Units vests, the Company will issue the withholding obligations to the satisfaction of Subject     to you, on the vesting date, one share of Common Stock for each Stock Unit that vests and such issuance date is referred to as the “ Original Issuance Date . ” If the Original Issuance Date falls on a date that is not a business day, delivery will instead occur on the next following business day. if (i) (c)  not However, the Original Issuance Date does occur (1) during an “open window period” applicable to you, as determined by the Company in accordance with the Company’s then-effective policy on trading in Company securities, or (2) on a date when you are otherwise permitted to sell shares of Common Stock on an established stock exchange or stock market (including but not limited to under a previously established written trading plan that meets the requirements of Rule 10b5-1 under the Exchange Act and was entered into in compliance with the Company’s policies (a “ 10b5-1 Plan ”)), and (ii) the Company elects, prior to the Original Issuance Date, not to satisfy the Withholding Taxes described in Section 10 by withholding shares of Common Stock from the shares otherwise due, on the Original Issuance Date, to you under this Award, then the shares that would otherwise be issued to you on the Original Issuance Date will not be delivered on such Original Issuance Date and will instead be delivered on the first business day when you are not prohibited from selling shares of the Company’s Common Stock in the open public market, but in no event later than December 31 of the calendar year in which the Original Issuance Date occurs (that is, the last day of your taxable year in which the Original Issuance Date occurs), or, if and only if permitted in a manner that complies with Treasury Regulation Section 1.409A-1(b)(4), no later than the date that is the later of (i) the 15th day of the third month following the end of the calendar year in which such shares of Common Stock under this Award are no longer subject to a “substantial risk of forfeiture” within the meaning of Treasury Regulation Section 1.409A-1(d) or (ii) the 15th day of the third month following the end of the Company’s fiscal year in which such shares of Common Stock under this Award are no longer subject to a “substantial risk of forfeiture” within the meaning of Treasury Regulation Section 1.409A-1(d). 26.  Dividends.   You will receive no benefit or adjustment to your Award or Stock Units with respect to any cash dividend, stock dividend or other distribution that does not constitute a Capitalization Adjustment as provided in the Plan; provided, however, that this sentence will not apply with respect to any shares of Common Stock that are delivered to you in connection with your Award after such shares have been delivered to you. 27.  Restrictive  Legends.  The Common Stock issued with respect to your Stock Units will be endorsed with appropriate legends, if any, as determined by the Company. 28.  Award not a Service Contract .  (a)  Except as otherwise provided in a separate, written employment or other agreement between the Company and/or its Affiliates and you, your Continuous Service is not for any specified term and may be terminated by you or by the Company or an Affiliate at any time, for any reason, with or without cause and with or without notice. Nothing in this Award Agreement (including, but not limited to, the vesting of your Stock Units or the issuance of the shares in respect of your Stock Units), the Plan or any covenant of good faith and fair dealing that may be found implicit in this Award Agreement or the Plan will: (i) confer upon you any right to continue in the employ or service of, or affiliation with, the Company or an Affiliate; (ii) constitute any promise or commitment by the Company or an Affiliate regarding the fact or nature of future positions, future work assignments, future compensation or any other term or condition of employment or affiliation; (iii) confer any right or benefit under this Award Agreement or the Plan unless such right or benefit has specifically accrued under the terms of this Award Agreement or Plan; or (iv) deprive the Company of the right to terminate you at will and without regard to any future vesting opportunity that you may have. (b)  By accepting this Award, you acknowledge and agree that the right to continue vesting in the Award pursuant to the vesting schedule provided in the Grant Notice is earned only by continuing as an employee, director or consultant at the will of the Company or an Affiliate, as applicable (not through the act of being hired, being granted this Award or any other award or benefit) and that the Company has the right to reorganize, sell, spin-out or otherwise restructure one or more of its businesses or Affiliates at any time or from time to time, as it deems appropriate (a “ Reorganization ”). You further acknowledge and agree that such Reorganization could result in the termination of your Continuous Service or the termination of Affiliate status of your employer and the loss of benefits available to you under this Award Agreement , including but not limited to, the termination of the right to continue vesting in the Award. You further acknowledge and agree that this Award Agreement , the Plan, the transactions contemplated hereunder and the vesting schedule set forth herein or any covenant of good faith and fair dealing that may be found implicit in any of them do not constitute an express or implied promise of continued engagement as an employee or consultant for the term of this Award Agreement, for any period, or at all, and shall not interfere in any way with your right or the Company’s right to terminate your Continuous Service at any time, with or without cause and with or without notice. 29.  Withholding Obligations. (a)  On each vesting date, and on or before the time you receive a distribution of the shares in respect of your Stock Units, and at any other time as reasonably requested by the Company in accordance with applicable tax laws, you hereby authorize any required withholdings from the shares of Common Stock issuable to you and/or otherwise agree to make adequate provision, including in cash, for any sums required to satisfy the federal, state, local and foreign tax withholding obligations of the Company or any Affiliate that arise in connection with your Award (the “ Withholding Taxes ”). Specifically, the Company or an Affiliate may, in its sole discretion, satisfy all or any portion of the Withholding Taxes relating to your Award by any of the following means or by a combination of such means: (i) withholding from any compensation otherwise payable to you by the Company or an Affiliate; (ii) causing you to tender a cash payment; (iii) permitting or requiring you to enter into a “same day sale” commitment with a broker-dealer that is a member of the Financial Industry Regulatory Authority (a “ FINRA Dealer ”) whereby you irrevocably elect to sell a portion of the shares to be delivered in connection with your Stock Units to satisfy the Withholding Taxes and whereby the FINRA Dealer irrevocably commits to forward the proceeds necessary to satisfy the Withholding Taxes directly to the Company and/or its Affiliates; or (iv) withholding shares of Common Stock from the shares of Common Stock issued or otherwise issuable to you in connection with your Stock Units with a Fair Market Value (measured as of the date shares of Common Stock are issued to you) equal to the amount of such Withholding Taxes; provided, however , that the number of such shares of Common Stock so withheld will not exceed the amount necessary to satisfy the Company’s required tax withholding obligations using the minimum statutory withholding rates for federal, state, local and, if applicable, foreign tax purposes, including payroll taxes, that are applicable to supplemental taxable income; and provided further, that to the extent necessary to qualify for an exemption from application of Section 16(b) of the Exchange Act, such share withholding procedure shall be subject to the express prior approval of the Board or a duly authorized committee thereof. (b)  any Affiliate are satisfied, the Company will have no obligation to deliver to you any Common Stock or other consideration pursuant to this Award. the Withholding Taxes the Company and/or Unless of (c)  In the obligation to withhold arises prior to the delivery to you of Common Stock or it is determined after the delivery of Common Stock to you that the amount of the Company’s withholding obligation was greater than the amount withheld by the Company, you agree to indemnify and hold the Company harmless from any failure by the Company to withhold the proper amount. Company’s event the 30.  Unsecured  Obligation.  Your Award is unfunded, and as a holder of vested Stock Units, you will be considered an unsecured creditor of the Company with respect to the Company’s obligation, if any, to issue shares or other property pursuant to this Award Agreement. You will not have voting or any other rights as a shareholder of the Company with respect to the shares to be issued pursuant to this Award Agreement until such shares are issued to you. Upon such issuance, you will obtain full voting and other rights as a shareholder of the Company. Nothing contained in this Award Agreement, and no action taken pursuant to its provisions, will create or be construed to create a trust of any kind or a fiduciary relationship between you and the Company or any other person. 31.  Other Documents  . You hereby acknowledge receipt of and the right to receive a document providing the information required by Rule 428(b)(1) promulgated under the Securities Act, which includes the Plan prospectus. In addition, you acknowledge receipt of the Company’s policy permitting certain individuals to sell shares only during certain “window” periods and the Company’s insider trading policy, in effect from time to time. 32.  Notices .  Any notices provided for in this Award Agreement or the Plan will be given in writing (including electronically) and will be deemed effectively given upon receipt or, in the case of notices delivered by the Company to you, five days after deposit in the United States mail, postage prepaid, addressed to you at the last address you provided to the Company. The Company may, in its sole discretion, decide to deliver any documents related to participation in the Plan and this Award by electronic means or to request your consent to participate in the Plan by electronic means. By accepting this Award, you consent to receive such documents by electronic delivery and to participate in the Plan through an on-line or electronic system established and maintained by the Company or another third party designated by the Company . 33.  Personal  Data  . You understand that your employer, if applicable, the Company, and/or its Affiliates hold certain personal information about you, including but not limited to your name, home address, telephone number, date of birth, social security or equivalent tax identification number, salary, nationality, job title, and details of your Award (the “ Personal Data ” ). Certain Personal Data may also constitute “ Sensitive Personal Data ” or similar classification under applicable local law and be subject to additional restrictions on collection, processing and use of the same under such laws. Such data include but are not limited to Personal Data and any changes thereto, and other appropriate personal and financial data about you. You hereby provide express consent to the Company or its Affiliates to collect, hold, and process any such Personal Data and Sensitive Personal Data. You also hereby provide express consent to the Company and/or its Affiliates to transfer any such Personal Data and Sensitive Personal Data outside the country in which you are employed or retained, including transfers to the United States, if applicable. The legal persons for whom such Personal Data are intended are the Company and any broker company providing services to the Company in connection with the administration of the Plan. You have been informed of your right to access and correct your Personal Data and/or Sensitive Personal Data by applying to the Company. 34.  Additional Acknowledgements .  You hereby consent and acknowledge that: (a)  Participation in the Plan is voluntary and therefore you must accept the terms and conditions of the Plan and this Award Agreement and Grant Notice as a condition to participating in the Plan and receipt of this Award. This Award and any other awards under the Plan are voluntary and occasional and do not create any contractual or other right to receive future awards or other benefits in lieu of future awards, even if similar awards have been granted repeatedly in the past. All determinations with respect to any such future awards, including, but not limited to, the time or times when such awards are made, the size of such awards and performance and other conditions applied to the awards, will be at the sole discretion of the Company. (b)  The future value of be predicted with certainty. You do not have, and will not assert, any claim or entitlement to compensation, indemnity or damages arising from the termination of this Award or diminution in value of this Award and you irrevocably release the Company, its Affiliates and, if applicable, your employer, if different from the Company, from any such claim that may arise. Award is unknown and cannot your (c)  The rights and obligations of the Company under your Award will be transferable to any one or more persons or entities, and all covenants and agreements hereunder will inure to the benefit of, and be enforceable by the Company’s successors and assigns. (d)  Upon request, you agree to execute any further documents or instruments necessary or desirable in the sole determination of the Company to carry out the purposes or intent of your Award. (e)  You have reviewed your Award in its entirety, have had an opportunity to obtain the advice of counsel prior to executing and accepting your Award, and fully understand all provisions of your Award. (f)  This Award Agreement will be subject to all applicable laws, rules, and regulations, and to such approvals by any governmental agencies or national securities exchanges as may be required. (g)  All obligations of the Company under the Plan and this Award Agreement will be binding on any successor to the Company, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation, or otherwise, of all or substantially all of the business and/or assets of the Company. 35.  Governing Plan Document .  Your Award is subject to all the provisions of the Plan, the provisions of which are hereby made a part of your Award, and is further subject to all interpretations, amendments, rules and regulations which may from time to time be promulgated and adopted pursuant to the Plan. In addition, your Award will be subject to recoupment in accordance with any clawback policy that the Company has adopted or any clawback policy that the Company is required to adopt pursuant to the listing standards of any national securities exchange or association on which the Company’s securities are listed or as is otherwise required by the Dodd–Frank Wall Street Reform and Consumer Protection Act or other applicable law. No recovery of compensation under such a clawback policy will be an event giving rise to a right to resign for “good reason” or “constructive termination” (or similar term) under any plan of or agreement with the Company. Except as expressly provided in this Award Agreement or the Grant Notice, in the event of any conflict between the provisions of your Award and those of the Plan, the provisions of the Plan will control. 36.  Severability.  If all or any part of this Award Agreement or the Plan is declared by any court or governmental authority to be unlawful or invalid, such unlawfulness or invalidity will not invalidate any portion of this Award Agreement or the Plan not declared to be unlawful or invalid. Any Section of this Award Agreement (or part of such a Section) so declared to be unlawful or invalid will, if possible, be construed in a manner which will give effect to the terms of such Section or part of a Section to the fullest extent possible while remaining lawful and valid. 37.  Effect  on  Other  Employee  Benefit  Plans.  The value of the Award subject to this Award Agreement will not be included as compensation, earnings, salaries, or other similar terms used when calculating the Employee’s benefits under any employee benefit plan sponsored by the Company or any Affiliate, except as such plan otherwise expressly provides. The Company expressly reserves its rights to amend, modify, or terminate any of the Company’s or any Affiliate’s employee benefit plans. 38.  Amendment.  Any amendment to this Award Agreement must be in writing, signed by a duly authorized representative of the Company. The Board reserves the right to amend this Award Agreement in any way it may deem necessary or advisable to carry out the purpose of the grant as a result of any change in applicable laws or regulations or any future law, regulation, interpretation, ruling, or judicial decision. 39.  Compliance with Section 409A of the Code . This Award is intended to be exempt from the application of Section 409A of the Code, including but not limited to by reason of complying with the “short-term deferral” rule set forth in Treasury Regulation Section 1.409A-1(b) (4) and any ambiguities herein shall be interpreted accordingly. However, if this Award fails to satisfy the requirements of the short-term deferral rule and is otherwise not exempt from, and therefore deemed to be deferred compensation subject to, Section 409A of the Code, this Award shall comply with Section 409A of the Code to the extent necessary to avoid adverse personal tax consequences and any ambiguities herein shall be interpreted accordingly. To the extent this Award is subject to Section 409A of the Code and if you are a “Specified Employee” (within the meaning set forth Section 409A(a)(2)(B)(i) of the Code) as of the date of your separation from service (within the meaning of Treasury Regulation Section 1.409A-1(h)), then the issuance of any shares that would otherwise be made upon the date of the separation from service or within the first six months thereafter will not be made on the originally scheduled dates and will instead be issued in a lump sum on the date that is six months and one day after the date of the separation from service, with the balance of the shares issued thereafter in accordance with the original vesting and issuance schedule set forth above, but if and only if such delay in the issuance of the shares is necessary to avoid the imposition of taxation on you in respect of the shares under Section 409A of the Code. Each installment of shares that vests is a “separate payment” for purposes of Treasury Regulation Section 1.409A-2(b)(2). 40.  No  Obligation  to  Minimize  Taxes.      The Company has no duty or obligation to minimize the tax consequences to you of this Award and will not be liable to you for any adverse tax consequences to you arising in connection with this Award. You are hereby advised to consult with your own personal tax, financial and/or legal advisors regarding the tax consequences of this Award and by signing the Grant Notice, you have agreed that you have done so or knowingly and voluntarily declined to do so. This Restricted Stock Unit Award Agreement will be deemed to be accepted by you upon your acceptance of the Restricted Stock Unit Grant Notice to which it is attached. * * * Consent of Independent Registered Public Accounting Firm The Board of Directors and Stockholders Sientra, Inc.: We consent to the incorporation by reference in the registration statements (No. 333-199684, 333-202879 and 333-209129) on Form S-8 of Sientra, Inc. of our report dated March 10, 2016, with respect to the balance sheets of Sientra, Inc. as of December 31, 2015 and 2014, and the related statements of operations, convertible preferred stock and stockholders’ equity (deficit), and cash flows for each of the years in the three-year period ended December 31, 2015, and the related financial statement schedule, which report appears in the December 31, 2015 annual report on Form 10-K of Sientra, Inc. Woodland Hills, California March 10, 2016 /s/ KPMG LLP Exhibit 31.1   CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF THE SARBANES ‑‑OXLEY ACT OF 2002 I, Jeffrey Nugent , certify that: 1. I have reviewed this annual report on Form 10 ‑K of Sientra, Inc.; Exhibit 31.1 Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a 2.  material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; Based on my knowledge, the financial statements, and other financial information included in this report, fairly 3.  present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 4.  controls and procedures (as defined in Exchange Act Rules 13a ‑15(e) and 15d ‑15(e)) for the registrant and have: The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure a.  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; b.  Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and c.  Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal 5.  control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): a.  All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and b.  Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. Date: March 10 , 201 6 /s/ Jeffrey Nugent President and Chief Executive Officer Jeffrey Nugent Chief Executive Officer Exhibit 31.2     Exhibit 31.2 CERTIFICATION OF CHIEF FINANIAL OFFICER PURSUANT TO SECTION 302 OF THE SARBANES ‑‑OXLEY ACT OF 2002 I, Matthew Pigeon, certify that: 1. I have reviewed this annual report on Form 10 ‑K of Sientra, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a ‑15(e) and 15d ‑15(e)) for the registrant and have: a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; b. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and c. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and 5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. Date: March 10 , 201 6 /s/ Matthew Pigeon Chief Financial Officer Matthew Pigeon Chief Financial Officer Exhibit 32.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES ‑‑OXLEY ACT OF 2002 Exhibit 32.1 In connection with the Annual Report of Sientra, Inc. (the “Company”) on Form 10 ‑K for the period ended December 31, 201 5 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jeffrey Nugent , Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes ‑Oxley Act of 2002, to my knowledge that: (1) (2) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: March 10, 2016 /s/ Jeffrey Nugent President and Chief Executive Officer Jeffrey Nugent Chief Executive Officer A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. Exhibit 32.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES ‑‑OXLEY ACT OF 2002 Exhibit 32.2 In connection with the Annual Report of Sientra, Inc. (the “Company”) on Form 10 ‑K for the period ended December 31, 201 5 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Matthew Pigeon, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes ‑Oxley Act of 2002, to my knowledge that: (1) (2) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: March 1 0 , 201 6 /s/ Matthew Pigeon Matthew Pigeon Chief Financial Officer A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.       

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