Zynex
Annual Report 2021

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 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the year ended December 31, 2021 For the transition period from to Commission file number 001-38804 ZYNEX, INC. (Exact name of registrant as specified in its charter) Nevada (State or other jurisdiction of incorporation or organization) 9655 Maroon Circle, Englewood, CO (Address of principal executive offices) 90-0275169 (IRS Employer Identification No.) 80112 (Zip Code) Securities registered pursuant to Section 12(b) of the Act: Title of each class Common Stock, $0.001 par value per share Ticker symbol(s) ZYXI Name of each exchange on which registered The Nasdaq Stock Market LLC Registrant’s telephone number, including area code: (303) 703-4906 Securities registered pursuant to Section 12(g) of the Act: Title of each class Common Stock, $0.001 par value 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 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 every Interactive Data File required to be submitted 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 such files). ⌧ Yes ☐ No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer Non-accelerated filer ☐ Accelerated filer ⌧ Smaller reporting company Emerging growth company ☐ ☒ ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). ☐ Yes ⌧ No The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant as of June 30, 2021, the last business day of the Registrant’s last completed second quarter, based upon the closing price of the common stock as reported by the Nasdaq Stock Market on such date was approximately $307.6 million. As of March 18, 2022, 41,454,160 shares of common stock are issued and 39,784,068 shares are outstanding. Documents incorporated by reference: Portions of the Registrant’s definitive proxy statement relating to its 2021 annual meeting of shareholders (the “ Proxy Statement”) are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The 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. TABLE OF CONTENTS ZYNEX, INC ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 2021 Table of Contents PART I Item 1. Business Item 1A. Risk Factors Item 1B. Unresolved Staff Comments Item 2. Properties Item 3. Legal Proceedings Item 4. Mine Safety Disclosures PART II Item 5. Market For Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities Item 6. [Reserved] Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations Item 7A. Quantitative and Qualitative Disclosures About Market Risk Item 8. Financial Statements and Supplementary Data Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosures Item 9A. Controls and Procedures Item 9B. Other Information Item 9C. Disclosure Regrading Foreign Jurisdictions that Prevent Inspections PART III Item 10. Directors, Executive Officers and Corporate Governance Item 11. Executive Compensation Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters Item 13. Certain Relationships and Related Transactions, and Director Independence Item 14. Principal Accounting Fees and Services PART IV Item 15. Exhibits, Financial Statement Schedules Item 16. Form 10-K Summary Signatures Page 2 2 11 21 22 22 22 22 22 23 23 32 32 32 32 33 33 33 33 33 33 34 34 35 35 37 38 Table of Contents CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION This report includes statements of our expectations, intentions, plans, and beliefs that constitute “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Nonetheless, it is important for an investor to understand that these statements involve risks and uncertainties. These statements relate to the discussion of our business strategies and our expectations concerning future operations, margins, profitability, liquidity, and capital resources and to analyses and other information that are based on forecasts of future results and estimates of amounts not yet determinable. We have used words such as “may,” “will,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “think,” “estimate,” “seek,” “expect,” “predict,” “could,” “project,” “potential,” and other similar terms and phrases, including references to assumptions, in this report to identify forward-looking statements. These forward-looking statements are made based on expectations and beliefs concerning future events affecting us and are subject to uncertainties, risks and factors relating to our operations and business environment, all of which are difficult to predict and many of which are beyond our control, that could cause our actual results to differ materially from those matters expressed or implied by these forward-looking statements. Such risks and other factors also include those listed in Item 1A. “Risk Factors and elsewhere in this report and our other filings with the Securities and Exchange Commission. When considering these forward-looking statements, you should keep in mind the cautionary statements in this report and the documents incorporated by reference. New risks and uncertainties arise from time to time, and we cannot predict those events or how they may affect us. We assume no obligation to update any forward-looking statements after the date of this report as a result of new information, future events or developments, except as required by applicable laws and regulations. When used in this annual report, the terms the “Company,” “Zynex”, “we,” “us,” “ours,” and similar terms refer to Zynex, Inc., a Nevada corporation, and its subsidiaries, Zynex Medical, Inc., Zynex NeuroDiagnostics, Inc., Zynex Monitoring Solutions Inc., Kestrel Labs, Inc., Zynex Europe ApS and Pharmazy, Inc. As of the date of this annual report, our only operating subsidiary is Zynex Medical, Inc. (“ZMI”). Zynex Monitoring Solutions, Inc. (“ZMS”) has developed its fluid monitoring system product as described below. 1 Table of Contents ITEM 1. BUSINESS History PART I Zynex, Inc. was founded by Thomas Sandgaard in 1996, when he founded two privately held companies that eventually were folded into Zynex, Inc. Zynex, Inc., a Nevada corporation, is the parent company of and conducts business within five active and inactive subsidiaries. As of December 31, 2021, the Company’s only active subsidiaries are Zynex Medical, Inc. (“ZMI,” a wholly-owned Colorado corporation) through which the Company conducts most of its operations, and Zynex Monitoring Solutions, Inc. (“ZMS,” a wholly-owned Colorado corporation). The Company’s inactive subsidiaries include Zynex Europe, Zynex NeuroDiagnostics, Inc. (“ZND,” a wholly-owned Colorado corporation) and Pharmazy, Inc. (“Pharmazy”, a wholly-owned Colorado Corporation), which was incorporated in June 2015. The Company’s compounding pharmacy operated as a division of ZMI dba as Pharmazy through January 2016. In December 2021, the Company acquired 100% of Kestrel Labs, Inc. (“Kestrel”), a laser-based, noninvasive patient monitoring technology company. Kestrel’s laser-based products include the NiCO™ CO-Oximeter, a multi-parameter pulse oximeter, and HemeOx™, a total hemoglobin oximeter that enables continuous arterial blood monitoring. Both NiCO and HemeOx are yet to be presented to the U.S. Food and Drug Administration (“FDA”) for market clearance. All activities related to Kestrel flow through our ZMS subsidiary. As of December 31, 2021, the Company conducts most of its operations through its primary subsidiary, ZMI. ZMS has developed a CM-1500 fluid volume monitoring system which was granted 510(K) clearance in February 2020 by the FDA in the United States of America. ZMS filed a 510K application for the CM-1600 in December 2021, its next generation wireless fluid and blood volume system. ZMS has achieved no revenues to date. Our inactive subsidiaries include ZND and Pharmazy. The Company’s compounding pharmacy operated as a division of ZMI dba as Pharmazy through January 2016. The Company also dissolved its subsidiary Zynex Billing and Consulting, LLC (ZBC) as a result of its long-standing inactivity. Upon dissolution, the Company eliminated its non-controlling interest in ZBC. Substantially all of our consolidated revenue in 2021 and 2020 is attributable to ZMI. Our headquarters are located in Englewood, Colorado. Active Subsidiaries Zynex Medical, Inc. (ZMI): ZMI designs, manufactures and markets medical devices that treat chronic and acute pain, as well as activate and exercise muscles for rehabilitative purposes with electrical stimulation. The Company’s devices are intended for pain management to reduce reliance on drugs and medications and provide rehabilitation and increased mobility through the utilization of non-invasive muscle stimulation, electromyography technology, interferential current (“IFC”), neuromuscular electrical stimulation (“NMES”) and transcutaneous electrical nerve stimulation (“TENS”). All of our medical devices are designed to be patient friendly and designed for home use. Our devices are small, portable, battery operated and include an electrical pulse generator which is connected to the body via electrodes. All of our medical devices are marketed in the U.S. and are subject to FDA regulation and approval. Our products require a physician’s prescription before they can be dispensed in the U.S. Our primary product is the NexWave device. The NexWave is marketed to physicians and therapists by our field sales representatives. The NexWave requires consumable supplies, such as electrodes and batteries, which are shipped to patients on a recurring monthly basis, as needed. ZMI distributes complementary products such as lumbar support, cervical traction, knee bracing, and hot/cold therapy. These complement our pain management products and are critical for physicians and therapists. These products require a prescription and are covered by most insurance plans and Medicare. ZMI designs, manufactures, and markets the NeuroMove product. The NeuroMove contains electromyography and electric stimulation technology that is primarily used for stroke, spinal cord and traumatic brain injury rehabilitation (“SCI”), by reaching parts of the brain to re- connect with muscles, also known as neuroplasticity. The NeuroMove product is primarily marketed to medical clinics. Zynex did not have material sales of this product in 2021 or 2020. 2 Table of Contents ZMI also designs, manufactures, and markets the InWave product, an in-home electrical stimulation device used to treat female urinary incontinence. The device requires a prescription and is covered by most insurance plans and Medicare. Zynex did not have material sales of this product in 2021 or 2020. Zynex Monitoring Solutions (ZMS): ZMS was formed in 2011 to develop and market medical devices for non-invasive patient monitoring beginning with our hemodynamic fluid monitor, the Zynex Fluid Monitoring System (“CM-1500”). The fluid volume monitor is a non-invasive medical device for monitoring relative fluid volume changes used in operating and recovery rooms to detect fluid loss during surgery and internal bleeding during recovery. The CM- 1500 received 510(k) clearance from the FDA in February 2020. The fluid volume monitor has been tested in several Institutional Review Board (“IRB”) approved studies and was used in several blood donation settings where hundreds of subjects donated half a liter of blood, showing strong correlation to the index on the device. We have built a number of commercial devices in pilot-production and continue to refine the algorithms for the Blood Volume Index (BVI). We have received two U.S. utility patents for this unique application, the first in the fourth quarter of 2018 and the second in January 2021, and we believe this product could serve a currently unmet need in the market for safer surgeries and safer monitoring of patients during recovery. This CM-1500 has recently been subjected to multiple clinical studies, which are being utilized for collecting data to further validate the algorithm used to determine changes in relative fluid volume changes. ZMS completed a clinical trial in December 2021 with Wake Forest University to detect post-operative patient fluid status in the Post-Anesthesia Care Unit (“PACU”). ZMS also started enrollment in clinical trials with Vitalant Research Institute (the research arm of Vitalant, the nation's largest independent, nonprofit blood services provider) to track changes in the device's patented Relative Index during apheresis blood donation procedures and with DaVita Clinical Research characterizing changes in the device's patented Relative Index during hemodialysis procedures where a large volume of fluid is removed from patients. In addition to FDA clearance, we are pursuing European Union (“EU”) Certificate European (“CE”) Marking. CE Marking is a certification that a product meets the standards established by the 28 nations of the EU and qualifies for sale in the EU and 4-nation European Free Trade Association. As ZMS’ products are still in development, ZMS did not produce any revenue for the years ending December 31, 2021, and 2020. In addition to the fluid volume monitor, ZMS filed for a provisional patent for a non-invasive sepsis monitor in December 2020 and an updated utility patent filed in December 2021. Zynex International (Zynex Europe) (ZEU): ZEU was formed in 2012 to further progress Zynex’s international expansion. ZEU is currently conducting business and focused on sales and marketing our products within the international marketplace, upon receipt of necessary regulatory approvals. ZEU did not produce significant revenue for the years ended December 31, 2021, and 2020. SALES AND GROWTH STRATEGIES To date, ZMI accounts for substantially all of our revenue and profit. We are focused on expanding our sales force to address what we believe is an untapped market for electrotherapy products for pain management which has become more attractive due to large competitors exiting the market. As of December 31, 2021, we had approximately 400 field sales representatives on staff or in the hiring process, of which 6 were independent, contract representatives and the remainder were W-2 direct employees. We continue to hire field sales representatives at a rapid rate, focusing on the quality and caliber of each candidate with the goal of having approximately 500-600 sales representatives in the U.S. by the end of 2022. We will be focused on increasing performance management standards for our sales force. 3 Table of Contents In an effort to increase revenue and diversification in order to provide our prescribers and patients with diverse solutions for their pain management needs, we are continually adding new complementary products to our ZMI sales channel, such as our hot/cold therapy, cervical traction, knee braces and LSO back braces. In addition, in March 2020 we introduced a full catalog of over 3,300 physical therapy products to promote in the clinics which we serve. We believe adding these complementary products will increase our market share in the marketplace and, in the future, grow our core business by providing our electrotherapy patients additional non-pharmacological pain relief and complementary products to our manufactured devices. Distribution and Revenue Streams: Currently, substantially all of our revenue is generated through our ZMI subsidiary from our electrotherapy products. We sell through a direct sales force in United States. Our field sales representatives are engaged to sell in predefined geographic markets and are compensated with a base salary and commissions based on fixed amounts depending on the type of product sold and insurance carrier of the patient. Our efforts to date have been focused on the United States market. A significant portion of our revenue is derived from patients with insurance plans held by commercial health insurance carriers or government payers who pay on behalf of their insureds. The remaining portion of revenue is primarily received from workers’ compensation claims and attorneys representing injured patients, hospitals, clinics and private-pay individuals. A large part of our revenue is recurring. Recurring revenue results primarily from the sale of surface electrodes and batteries sent to existing patients with our units. Electrodes and batteries are consumable items that are considered an integral part of our products. Private Labeled Distributed Products In addition to our own products, we distribute, through our sales force, a number of private labeled supplies and complementary products from other domestic manufacturers. These products generally include patient consumables, such as electrodes and batteries plus cervical traction, lumbar support, knee braces and hot/cold therapy. Customarily, there are no formal contracts between vendors in the durable medical equipment industry. Replacement products and components are easily found, either from our own products or other manufacturers, and purchases are made by purchase order. 4 Table of Contents Products We currently market and sell Zynex-manufactured products and distribute complementary products and private labeled supplies for Zynex products, as indicated below: Product Name Description Zynex Medical Products NexWave NeuroMove InWave E-Wave Private Labeled Supplies Electrodes Batteries Distributed Complementary Products Dual channel, multi-modality IFC, TENS, NMES device Electromyography (EMG) — triggered electrical stimulation device Electrical stimulation for treatment of female urinary incontinence NMES device Supplies, re-usable for delivery of electrical current to the body Supplies, for use in electrotherapy products Comfortrac/Saunders Cervical traction JetStream LSO Back Braces Knee Braces Hot/cold therapy Lumbar support Knee support Zynex Monitoring Solutions Products CM-1500 CM-1600 Zynex Fluid Monitoring System Zynex Wireless Fluid Monitoring System – Submitted to the FDA, December 2021, not yet FDA cleared. NiCO CO-Oximeter Laser-based Noninvasive CO-Oximeter (Not yet FDA cleared) HemeOx tHb Oximeter Laser-based Total Hemoglobin Pulse Oximeter (Not yet FDA cleared) Product Uses Pain Management and Control Standard electrotherapy is a clinically proven and medically accepted alternative to manage acute and chronic pain. Electrical stimulation has been shown to reduce most types of local pain, such as tennis elbow, neck or lower back pain, arthritis, and others. The devices used to accomplish this are commonly described as the TENS family of devices. Electrotherapy is not known to have any negative side effects, a significant advantage over most pain relief medications. The benefits of electrotherapy can include: pain relief, increased blood flow, reduced edema, prevention of venous thrombosis, increased range-of-motion, prevention of muscle disuse atrophy, and reduced urinary incontinence. 5 Table of Contents Electrotherapy introduces an electrical current applied through surface electrodes. The electrical current “distorts” a pain signal on its way to the central nervous system and the brain, thus reducing the pain. Additionally, by applying higher levels of electricity, muscles contract and such contraction is believed to assist in the benefits mentioned above. Numerous clinical studies have been published over several decades showing the effectiveness of IFC and TENS for pain relief. Our primary electrotherapy device, the NexWave, has received FDA 510(k) clearance. The NexWave is a digital IFC, TENS and NMES device that delivers pain-alleviating electrotherapy. Stroke and Spinal Cord Injury Rehabilitation Our proprietary NeuroMove product is a Class II medical device that has been cleared by the FDA for stroke and SCI rehabilitation. Stroke and SCI usually affect a survivor’s mobility, functionality, speech, and memory, and the NeuroMove is designed to help the survivor regain movement and functionality. Sales of NeuroMove have not generated material revenue for the years ended December 31, 2021 and 2020. Hemodynamic Monitoring Hemodynamic monitoring is the process of measuring the blood flow and pressure exerted in the heart, veins, and arteries. It provides an assessment of a patient’s circulatory status and their ability to assure cardiac output and oxygen delivery to the body. Maintaining effective circulating blood volume and pressure are key to assuring adequate oxygen saturation and perfusion. Hemodynamic monitoring devices have been historically classified as, (a) invasive, using a central or pulmonary artery catheter, (b) minimally invasive, with the placement of an arterial line, and (c) noninvasive, where no device is inserted into the body for clinical assessment. The Zynex Fluid Monitoring System (CM-1500) and the Zynex Wireless Fluid Monitoring System (CM-1600) are noninvasive monitoring devices designed to measure relative changes in fluid volume in adult patients. Fluid status is determined using Zynex’s proprietary algorithm and expressed as the patented Relative IndexTM, a simple value designed to accurately trend patient vital signs and alert clinicians for early intervention. The Zynex Fluid Monitoring System (CM-1500) was cleared by the FDA in 2020. The Zynex Wireless Fluid Monitoring System (CM-1600) has been submitted to the FDA and is pending clearance. Pulse Oximetry Monitoring Pulse oximetry is a noninvasive method of measuring the oxygen saturation level (SpO2) of arterial blood. As one of the most common medical devices used in and out of hospitals around the world, pulse oximeters have gained widespread clinical acceptance as the standard of care for monitoring oxygen saturation. SpO2 has become the “fifth vital sign”, which, together with heart rate, blood pressure, respiratory rate, and temperature, provides crucial clinical information about a person’s health status. The NiCO™ Noninvasive CO-Oximeter, the first laser-based photoplethysmographic patient monitoring technology, is designed to noninvasively measure and monitor four crucial species of hemoglobin with unprecedented accuracy. The HemeOx™ Total Hemoglobin Pulse Oximeter is designed to noninvasively measure total hemoglobin and oxygen saturation, two critical parameters that typically require invasive arterial blood sampling for measurement. Total hemoglobin is a very commonly ordered blood test in healthcare, and HemeOx™ measures it with the continuous and noninvasive ease of a pulse oximeter at the patient bedside. The NiCO™ Noninvasive CO-Oximeter and the HemeOx™ Total Hemoglobin Pulse Oximeter have not yet been cleared by the FDA. 6 Table of Contents MARKETS Zynex Medical (ZMI): To date, the majority of our revenue has been generated by our ZMI electrotherapy products and private labeled supplies. Thus, we primarily compete in the home electrotherapy market for pain management, with products based on IFC, TENS and NMES devices and consumable supplies. We estimate the annual domestic market for home electrotherapy products at approximately $500 million. During 2020 and 2021, we grew our sales force to approximately 400 direct sales reps to address what we believe is an underserved electrotherapy market. The current opioid epidemic has been declared a health emergency, and we are uniquely positioned to help reduce the amount of opioids prescribed for treatment of chronic and acute pain symptoms. We are committed to providing health care professionals with alternatives to traditional opioid based treatment programs with our prescription-strength products which have no side-effects. This has never been more necessary than it is today considering the staggering statistics. ● Pain impacts the lives of more Americans than diabetes, heart disease, and cancer combined. ● Pain is the leading cause of disability, and seeking treatment for chronic or acute pain is the most common reason American’s seek health care. Approximately 50 million Americans suffer from chronic pain. ● Nearly 20 million Americans experienced high-impact chronic pain, defined as “limiting life or work activities on most days or every day”, in the past 3 months. ● If pharmaceuticals such as opioids continue to be used as the first line of defense, America will continue to see a rise in opioid misuse, addiction and drug-related deaths. We also distribute complementary products such as JetStream Hot/Cold Therapy, Knee bracing, Aspen LSO Back bracing and Comfortrac and Saunders cervical and lumbar traction units, all products targeted at treating acute as well as chronic pain with minimal side-effects. Key characteristics of our electrotherapy market are: ● Collection cycles of initial payment from insurance carriers can range from less than 30 days to many months and considerably longer for many attorney, personal injury, and workers’ compensation cases. Such delayed payment impacts our cash flow and can slow our growth or strain our liquidity. Collections are also impacted by whether effective billing submissions are made by our billing and collections department to the third-party payers. ● Prior to payment, third-party payers often make or take significant payment adjustments or discounts. This can also lead to denials and billing disputes with third-party payers. ● The majority of our revenue is generated by the sale of medical devices and from recurring patient supplies, specifically from our electrotherapy products sold through ZMI. We are reliant on third-party payer reimbursement. Zynex Monitoring Solutions (ZMS): ZMS is focused on developing products within the non-invasive multi-parameter patient-monitoring marketplace. ZMS is currently focusing on its fluid monitoring system, the recently announced sepsis monitor and the pulse oximetry products acquired in its acquisition of Kestrel. We believe our products, once released into the marketplace (of which there can be no guarantee), will compete against multiple competitors, ranging from large manufacturers with multiple business lines to small manufacturers that offer a limited range of products. We have not yet identified competitors for these products. ZMS has not generated any revenue. 7 Table of Contents Competition Since we are in the market for medical electrotherapy products, we face a mixture of competitors ranging from large manufacturers with multiple business lines to small manufacturers that offer a limited selection of products. Our principal competitors include International Rehabilitative Sciences, Inc. d/b/a RS Medical, EMSI, and H-Wave. In addition, we face competition from providers of alternative medical therapies, such as pharmaceutical companies. RESOURCES Manufacturing and Product Assembly Our manufacturing and product assembly strategy consists of the following elements: ● Compliance with relevant legal and regulatory requirements. ● Use of contract manufacturers as needed, thereby allowing us to quickly respond to changes in volume and avoid large capital investments for assembly and manufacturing equipment of certain product components. We believe there is a large pool of highly qualified contract manufacturers, domestically and internationally, for the type of manufacturing assistance needed for our manufactured devices. ● Utilization of in-house final assembly and test capabilities. ● Development of proprietary software and hardware for all products in house. ● Testing all units in a real-life, in-house environment to help ensure the highest possible quality and patient safety while reducing the cost of warranty repairs. We utilize contract manufacturers located in the U.S. to manufacture components for our NexWave and NeuroMove units and for some of our other products and assemble in-house for our NexWave and NeuroMove units. We do not have long-term supply agreements with our contract manufacturers, but we utilize purchase orders with agreed upon terms for our ongoing needs. We believe there are numerous suppliers that can manufacture our products and provide our required raw materials. Generally, we have been able to obtain adequate supplies of our required raw materials and components. We are always evaluating our suppliers for price, quality, delivery time and service. The reduction or interruption in supply, and an inability to develop alternative sources for such supply, could adversely affect our operations. Intellectual Property Zynex is committed to aggressively protect the intellectual property rights the Company has worked so hard to attain and to expand our intellectual property portfolio for advances to our existing products and for new products as they are developed. Zynex has recently received two new U.S. utility patents, as well as a utility patent in Europe, for our fluid monitoring system. The acquisition of Kestrel Labs, Inc. by Zynex Inc. included an intellectual property portfolio surrounding the acquired laser-based photoplethysmographic technology. This expands both the size and scope of Zynex’s intellectual property portfolio to include key aspects of the exciting pulse oximetry market. Zynex is trademarked in the U.S. We utilize non-disclosure and trade secret agreements with employees and third parties to protect our proprietary information. 8 Table of Contents GOVERNMENT REGULATION US Food and Drug Administration (FDA) All of our ZMI products are classified as Class II (Medium Risk) devices by the FDA, and clinical studies with our products are considered to be NSR (Non-Significant Risk Studies). Our business is regulated by the FDA, and all products typically require 510(k) market clearance before they can be put into commercial distribution. Section 510(k) of the Federal Food, Drug and Cosmetics Act, is available in certain instances for Class II (Medium Risk) products. It requires that before introducing most Class II devices into interstate commerce, the product must first submit information to the FDA demonstrating that the device is substantially equivalent in terms of safety and effectiveness to a device legally marketed prior to March 1976 or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act that do not require approval of a premarket approval application. When the FDA determines that the device is substantially equivalent, the agency issues a “clearance” letter that authorizes marketing of the product. We are also regulated by the FDA’s Good Manufacturing Practice (GMP) and Quality Systems Regulation (QSR). We believe that our products have obtained or are good candidates for the requisite FDA clearance or are exempt from the FDA clearance process. In November 2001, Zynex received FDA 510(k) clearance to market NeuroMove. In September 2011, Zynex received FDA 510(k) clearance to market the NexWave, our current generation IFC, TENS and NMES device. In August 2012, Zynex received FDA 510(k) clearance to market the InWave, our next generation muscle stimulator for treatment of female incontinence. Failure to comply with FDA requirements could adversely affect us. International Zynex continues to explore opportunities to gain regulatory clearance for its devices in markets outside of the U.S. CE marking is the medical device manufacturer's claim that a product meets the essential requirements of all relevant European Medical Device Directives. The CE mark is a legal requirement to place a device on the market in the EU. Zynex is currently in the process of applying for CE marking on several of its electrotherapy devices and its CM-1500 Zynex Fluid Monitoring System. The Far East, Middle East, Eastern Europe and Latin American markets have different regulatory requirements. We comply with applicable regulatory requirements within the markets in which we currently sell. If and when we decide to enter additional geographic areas, we intend to comply with applicable regulatory requirements within those markets. Zynex has received ISO13485: 2016 certification for its compliance with international standards in quality management systems for design, development, manufacturing and distribution of medical devices. This certification is not only important as assurance that we have the appropriate quality systems in place but is also crucial to our international expansion efforts as many countries require this certification as part of their regulatory approval. Government Regulation The delivery of health care services and products has become one of the most highly regulated professional and business endeavors in the United States. Both the federal government and individual state governments are responsible for overseeing the activities of individuals and businesses engaged in the delivery of health care services and products. Federal law and regulations are based primarily upon the Medicare and Medicaid programs. Each program is financed, at least in part, with federal funds. State jurisdiction is based upon the state’s interest in regulating the quality of health care in the state, regardless of the source of payment. Many state and local jurisdictions impose additional legal and regulatory requirements on our business including various states and local licenses, taxes, limitations regarding insurance claim submission and limitations on relationships with referral parties. Failure to comply with this myriad of regulations in a particular jurisdiction may subject us to fines or other penalties, including the inability to sell our products in certain jurisdictions. 9 Table of Contents Federal health care laws apply to us when we submit a claim to any other federally funded health care program, in addition to requirements to meet government standards. The principal federal laws that we must abide by in these situations include: ● Those that prohibit the filing of false or improper claims for federal payment. ● Those that prohibit unlawful inducements for the referral of business reimbursable under federally funded health care programs. The federal government may impose criminal, civil and administrative penalties on anyone who files a false claim for reimbursement from federally funded programs. A federal law commonly known as the “anti-kickback law” prohibits the knowing or willful solicitation, receipt, offer or payment of any remuneration made in return for: ● The referral of patients covered under federally-funded health care programs; or ● The purchasing, leasing, ordering, or arranging for any goods, facility, items or service reimbursable under those programs. Research and Development During 2021 and 2020, we incurred approximately $2.6 million and $0.8 million, respectively, of research and development expenses. We expect our research and development expenditures to increase in 2022 as our ZMS business expands. HUMAN CAPITAL As of December 31, 2021, we employed 774 full time employees of which approximately 400 are employed as direct sales representatives in the field. Our employees are our most important assets and set the foundation for our ability to achieve our strategic objectives. All of our employees contribute to our success and, in particular, our sales representatives are instrumental in our ability to reach more patients in pain. The success and growth of our business depends in large part on our ability to attract, retain and develop a diverse population of talented and high-performing employees at all levels of our organization. To succeed in a competitive labor market, we have developed recruitment and retention strategies, objectives and measures that we focus on as part of the overall management of our business. These strategies, objectives and measures form our human capital management framework and are advanced through the following programs, policies and initiatives: ● Competitive pay and benefits. Our compensation programs are designed to align the compensation of our employees with our performance and to provide the proper incentives to attract, retain, and motivate employees to achieve superior results. ● Training and development. We invest in learning opportunities that foster a growth mindset. Our formal offerings include a tuition reimbursement program, an e-learning program that all corporate employees have access to and in-house learning opportunities through the Company’s Zynex Growth and Development program. ● Health and Wellness. We invest in the health and wellness of our employees by offering monthly benefits and offer programs and support to assist our employees. 10 Table of Contents ITEM 1A. RISK FACTORS RISKS RELATED TO OUR BUSINESS We face risks related to health pandemics, particularly the outbreak of COVID-19 and subsequent variants, which could adversely affect our business and results of operations. Our business could be materially adversely affected by a widespread outbreak of contagious disease, including the recent outbreak of the novel coronavirus, known as COVID-19, which has spread to many countries throughout the world, including the United States. The effects of this outbreak on our business have included and could continue to include temporary closures of our providers and clinics and suspensions of elective surgical procedures. This has and could continue to impact our interactions and relationships with our customers. In addition to temporary closures of the providers and clinics that we serve, we could also experience temporary closures of the facilities of our suppliers, contract manufacturers, or other vendors in our supply chain, which could impact our business, interactions and relationships with our third-party suppliers and contractors, and results of operations. The extent to which the COVID-19 outbreak will impact business and the economy is highly uncertain and cannot be predicted. Accordingly, we cannot predict the extent to which our financial condition, results of operations and value of our common stock will be affected. The uncertainty surrounding the COVID-19 outbreak has caused the Company to increase its inventory in anticipation of possible supply chain shortages related to the COVID-19 virus. While the Company did not incur significant disruptions to its operations during 2020 and 2021, it is unable at this time to predict the impact that the COVID-19 virus will have on its business, financial position and operating results in future periods due to numerous uncertainties. We have encountered significant volatility in our recent operating results. The Company’s results from operations have improved significantly in recent years, but there have been significant volatility in our results over the past five years as reflected in the following table (in millions): Year 2017 2018 2019 2020 2021 Revenues Profit $ $ $ $ $ 23.4 31.9 45.5 80.1 130.3 $ $ $ $ $ 7.4 9.6 9.5 9.1 17.1 Our financial results could continue to be volatile, and there is no assurance we will continue our current increase in revenue and profits. We are dependent on reimbursement from third-party payers, most of whom are larger than we are and have substantially more employees and financial resources; changes in insurance reimbursement policies or application of them have resulted in decreased or delayed revenues. A large percentage of our revenues come from third-party payer reimbursement. Most of the third-party payers are large insurance companies with substantially more resources than we have. Upon delivery of our products to our patients, we directly bill the patients’ private insurance companies or government payers for reimbursement. If the third-party payers do not remit payment on a timely basis or if they change their policies to exclude or reduce coverage for our products, we would experience a decline in our revenue as well as cash flow. In addition, we may deliver products to patients and invoice based on past practices and billing experiences only to have third-party payers later deny coverage for such products. In some cases, our delivered product may not be covered pursuant to a policy statement of a third-party payer, despite a payment history with the third-party payer and benefits to the patients. A third-party payer may seek repayment of amounts previously paid for covered products. We maintain an allowance for provider discounts and amounts intended to cover legitimate requests for repayment. Failure to adequately identify and provide for amounts for resolution of repayment demands in our allowance for provider discounts could have a material adverse effect on our results of operations and cash flows. For government health care programs, if we identify a 11 Table of Contents deficiency in prior claims or practices, we may be required to repay amounts previously reimbursed to us by government health care programs. We frequently receive, and expect to continue to receive, refund requests from insurance providers relating to specific patients and dates of service. Billing and reimbursement disputes are very common in our industry. These requests are sometimes related to a few patients, and other times include a significant number of refund claims in a single request which can accumulate to a significant amount. We review and evaluate these requests and determine if any refund is appropriate. During the adjudication process we review claims where we are rebilling or pursuing additional reimbursement from that insurance provider. We frequently have significant offsets against such refund requests which may result in amounts that are due to us in excess of the amounts of refunds requested by the insurance providers. Therefore, at the time of receipt of such refund requests, we are generally unable to determine if a refund request is valid. Although we cannot predict whether or when a request for repayment or our subsequent request for reimbursement will be resolved, it is not unusual for such matters to be unresolved for a long period of time. No assurances can be given with respect to our estimates for our allowance for provider discounts refund claim reimbursements and offsets or the ultimate outcome of the refund requests. We at times have concentrations of credit risk with third-party payers; failure to collect these and other billed receivables could adversely affect our cash flows and results of operations. The Company had receivables from one third-party payer at December 31, 2021 which made up approximately 22% of the accounts receivable balance. The Company had receivables from one third-party payer at December 31, 2020, which made up approximately 26% of the accounts receivable balance. Future changes in coverage and reimbursement policies for our products or reductions in reimbursement rates for our products by third party payers could adversely affect our business and results of operations. In the United States, our products are prescribed by physicians for their patients. Based on the prescription, which we consider an order, we submit a claim for payment directly to third-party payers such as private commercial insurance carriers, government payers and others as appropriate and the third-party payer reimburses us directly. Federal and state statutes, rules, or other regulatory measures that restrict coverage of our products or reimbursement rates could have an adverse effect on our ability to sell or rent our products or cause physical therapists and physicians to dispense and prescribe alternative, lower-cost products. There are significant estimating risks associated with the amount of revenue, related refund liabilities, accounts receivable and provider discounts that we recognize, and if we are unable to accurately estimate these amounts, it could impact the timing of our revenue recognition, have a significant impact on our operating results or lead to a restatement of our financial results. There are significant risks associated with the estimation of the amount of revenues, related refund liabilities, accounts receivable, and provider discounts that we recognize in a reporting period. The billing and collection process is complex due to ongoing insurance coverage changes, geographic coverage differences, differing interpretations of coverage, differing provider discount rates, and other third-party payer issues. Determining applicable primary and secondary coverage for our customers at any point in time, together with the changes in patient coverage that occur each month, require complex, resource-intensive processes. Errors in determining the correct coordination of benefits may result in refunds to payers. Revenues associated with government programs are also subject to estimating risk related to the amounts not paid by the primary government payer that will ultimately be collectable from other government programs paying secondary coverage, the patient’s commercial health plan secondary coverage or the patient. Collections, refunds and pay or retractions typically continue to occur for up to three years and longer after our products are provided. While we typically look to our past experience in collections with a payer in estimating amounts expected to be collected on current billings, recent trends and current changes in reimbursement practice, the overall healthcare environment, and other factors nonetheless could ultimately impact the amount of revenues recorded and the receivables ultimately collected. If our estimates of revenues, related refund liabilities, accounts receivable or provider discounts are materially inaccurate, it could impact the timing of our revenue recognition and have a significant impact on our operating results. It could also lead to a restatement of our financial results. 12 Table of Contents Tax laws and regulations require compliance efforts that can increase our cost of doing business and changes to these laws and regulations could impact financial results. We are subject to a variety of tax laws and regulations in the jurisdictions in which we do business. Maintaining compliance with these laws can increase our cost of doing business and failure to comply could result in audits or the imposition of fines or penalties. Further, our future effective tax rates in any of these jurisdictions could be affected, positively or negatively, by changing tax priorities, changes in statutory rates, or changes in tax laws or the interpretation thereof. The most significant recent example of this is the impact of the U.S Tax Cuts and Jobs Act of 2017 (the “Tax Act”) which was enacted on December 22, 2017. These changes significantly revised the ongoing U.S. corporate income tax law by lowering the U.S. federal corporate income tax rate from 35% to 21%, implementing a territorial tax system, imposing a one-time tax on foreign unremitted earnings and setting limitations on deductibility of certain costs, among other things. The Company has implemented the Tax Act and does not expect any significant changes related to the Tax Act at this time. The Patient Protection and Accountability act of 2010 has had an impact on our business which may be in part beneficial and in part detrimental. In March 2010, broad federal health care reform legislation was enacted in the United States. This legislation did not become effective immediately in total, and may be modified prior to the effective date of some provisions. This legislation has had an impact on our business in a variety of ways including increased number of Medicaid recipients, increased number of individuals with commercial insurance, additional audits conducted by public health insurance plans such as Medicaid and Medicare, changes to the rules that govern employer group health insurance and other factors that influence the acquisition and use of health insurance from private and public payers. This legislation has resulted in a change in reimbursement for certain durable medical equipment. We believe the new healthcare legislation and these changes to reimbursement have caused uncertainty with prescribers, which we believe contributed to our drop in orders and revenue during 2013 and 2014 and the lack of any significant increase in 2015. Orders and revenue increased in 2016 through 2021; however, we are currently unable to determine whether such trend will continue in future periods or whether the health care reform legislation will have other adverse consequences to our business and results of operations. To the extent prescribers write fewer prescriptions for our products or there is an adverse change to insurance reimbursement for our products, due to the new law or otherwise, our revenue and profitability will be materially adversely affected. The uncertainty of continuing healthcare changes and regulations may place our business model in doubt. There is some doubt on the continuation of the Affordable Care Act and the legislation that the current Congress will enact to replace it, if any. Because we cannot be certain about the continuation of the Affordable Care Act or any changes or replacements thereto, even if the Affordable Care Act remains the law of the land, there is also some doubt whether the President will support it or take regulatory action to negatively impact its benefits. The amount of uncertainty creates concern on our customer’s willingness to buy products which may, or may not, be covered by future health care benefits even if they are covered currently. Hospitals and clinicians may not buy, prescribe or use our products in sufficient numbers, which could result in decreased revenues and profits. Hospitals and clinicians may not accept any of our products as effective, reliable, or cost-effective. Factors that could prevent such institutional patient acceptance include: ● If patients conclude that the costs of these products exceed the cost savings associated with the use of these products; ● If patients are financially unable to purchase these products; ● If adverse patient events occur with the use of these products, generating adverse publicity; ● If we lack adequate resources to provide sufficient education and training to our patients; ● If frequent product malfunctions occur, leading clinicians to believe that the products are unreliable; 13 Table of Contents ● Uncertainty regarding or change in government or third-party payer reimbursement policies for our products; and ● If physicians or other health care providers believe that our products will not be reimbursed by insurers or decide to prescribe competing products. Because our sales are dependent on prescriptions from physicians, if any of these or other factors result in fewer prescriptions for our products being written, we will have reduced revenues and may not be able to fully fund our operations. Although we experienced an increase in orders for our ZMI products during 2020 and 2021 compared to prior years, we can make no assurances that demand for our products will not decline in future periods. Any new competitor could be larger than us and have greater financial and other resources than we do, and those advantages could make it difficult for us to compete with them. Many competitors to our products may have substantially greater financial, technical, marketing, and other resources. Competition could result in fewer orders, reduced gross margins, and loss of market share. Our products are regulated by the FDA in the United States. Competitors may develop products that are substantially equivalent to our FDA-cleared products, thereby using our products as predicate devices to more quickly obtain FDA approval for their own products. If overall demand for our products should decrease it could have a material adverse effect on our operating results. Substantial competition is expected in the future in the area of stroke rehabilitation that may directly compete with our NeuroMove product. These competitors may use standard or novel signal processing techniques to detect muscular movement and generate stimulation to such muscles. Other companies may develop rehabilitation products that perform better and/or are less expensive than our products, which could have a material adverse effect on our operating results. Failure to keep pace with the latest technological changes could result in decreased revenues. The market for some of our products is characterized by rapid change and technological improvements. Failure to respond in a timely and cost- effective way to these technological developments could result in serious harm to our business and operating results. We have derived, and we expect to continue to derive, a substantial portion of our revenues from the development and sale of products in the medical device industry. As a result, our success will depend, in part, on our ability to develop and market product offerings that respond in a timely manner to the technological advances of our competitors, evolving industry standards and changing patient preferences. There is no assurance that we will keep up with technological improvements. Our business could be adversely affected by reliance on sole suppliers. Notwithstanding our current multiple supplier approach, certain essential product components may be supplied in the future by sole, or a limited group of, suppliers. Most of our products and components are purchased through purchase orders rather than through long term supply agreements and large volumes of inventory may not be maintained. There may be shortages and delays in obtaining certain product components. Disruption of the supply or inventory of components could result in a significant increase in the costs of these components or could result in an inability to meet the demand for our products. In addition, if a change in the manufacturer of a key component is required, qualification of a new supplier may result in delays and additional expenses in meeting customer demand for products. These factors could adversely affect our revenues and ability to retain our experienced sales force. A third-party manufacturer’s inability to produce our goods on time and to our specifications could result in lost revenue. Third-party manufacturers assemble and manufacture components of the NexWave and NeuroMove and some of our other products to our specifications. The inability of a manufacturer to ship orders of our products in a timely manner or to meet our quality standards could cause us to miss the delivery date requirements of our patients for those items, which could result in cancellation of orders, refusal to accept deliveries or a reduction in purchase prices, any of which could have a material adverse effect on our revenues. Because of the timing and seriousness of our business, and the medical device industry in particular, the dates on which patients need and require shipments of products from us are critical. Further, because quality is a leading factor when patients, doctors, health insurance providers and distributors accept or reject goods, any decline in quality by our third-party manufacturers could be detrimental not only to a particular order, but also to our future relationship with that particular patient. 14 Table of Contents We could experience cost increases or disruptions in supply of raw materials or other components used in our products. Our third-party manufacturers that assemble and manufacture components for our products expect to incur significant costs related to procuring raw materials required to manufacture and assemble our product. The prices for these raw materials fluctuate depending on factors beyond our control including market conditions and global demand for these materials and could adversely affect our business, prospects, financial condition, results of operations, and cash flows. Further, any delays or disruptions in our supply chain could harm our business. For example, COVID-19, including associated variants, could cause disruptions to and delays in our operations, including shortages and delays in the supply of certain parts, including semiconductors, materials and equipment necessary for the production of our products, and the internal designs and processes we or third-parties may adopt in an effort to remedy or mitigate impacts of such disruptions and delays could result in higher costs. In addition, our business also depends on the continued supply of battery cells for our products. We are exposed to multiple risks relating to availability and pricing of quality battery cells. These risks include: ● the inability or unwillingness of battery cell manufacturers to build or operate battery cell manufacturing plants to supply the numbers of battery cells (including the applicable chemistries) required to support the growth of the electric or plug-in hybrid vehicle industry as demand for such cells increases; ● disruption in the supply of battery cells due to quality issues or recalls by the battery cell manufacturers; and ● an increase in the cost, or decrease in the available supply of raw materials used in battery cells, such as lithium, nickel, and cobalt. Furthermore, currency fluctuations, tariffs or shortages in petroleum and other economic or political conditions may result in significant increases in freight charges and raw material costs. Substantial increases in the prices for raw materials or components would increase our operating costs and could reduce our margins. We depend upon third parties to manufacture and to supply key semiconductor chip components necessary for our products. We do not have long-term agreements with our semiconductor chip manufacturers and suppliers, and if these manufacturers or suppliers become unwilling or unable to provide an adequate supply of semiconductor chips, with respect to which there is a global shortage, we would not be able to find alternative sources in a timely manner and our business would be adversely impacted. Semiconductor chips are a vital input component to the electrical architecture of our products, controlling wide aspects of the products’ operations. Many of the key semiconductor chips we use in our products come from limited or single sources of supply, and therefore a disruption with any one manufacturer or supplier in our supply chain would have an adverse effect on our ability to effectively manufacture and timely deliver our products. We do not have any long- term supply contracts with any suppliers and purchase chips on a purchase order basis. Due to our reliance on these semiconductor chips, we are subject to the risk of shortages and long lead times in their supply. We are in the process of identifying alternative manufacturers for semiconductor chips. We have in the past experienced, and may in the future experience, semiconductor chip shortages, and the availability and cost of these components would be difficult to predict. For example, our manufacturers may experience temporary or permanent disruptions in their manufacturing operations due to equipment breakdowns, labor strikes or shortages, natural disasters, component or material shortages, cost increases, acquisitions, insolvency, changes in legal or regulatory requirements, or other similar problems. In particular, increased demand for semiconductor chips in 2020, due in part to the COVID-19 pandemic and increased demand for consumer electronics that use these chips, has resulted in a severe global shortage of chips in 2021. As a result, our ability to source semiconductor chips to be used in our products has been adversely affected. This shortage may result in increased chip delivery lead times, delays in the production of our products, and increased costs to source available semiconductor chips. To the extent this semiconductor chip shortage continues, and we are unable to mitigate the effects of this shortage, our ability to deliver sufficient quantities of our products to fulfill our preorders and to support our growth through sales to new customers would be adversely affected. In addition, we may be required to incur additional costs and expenses in managing ongoing chip shortages, including additional research and development expenses, engineering design and development costs in the event that new suppliers must be onboarded on an expedited basis. Further, ongoing delays in production and shipment of products due to a continuing shortage of semiconductor chips may harm our reputation and discourage additional preorders and sales, and otherwise materially and adversely affect our business and operations. 15 Table of Contents If we need to replace manufacturers, our expenses could increase resulting in smaller profit margins. We compete with other companies for the production capacity of our manufacturers and import quota capacity. Some of these competitors have greater financial and other resources than we have, and thus have an advantage in the competition for production and import quota capacity. If we experience a significant increase in demand, or if we need to replace an existing manufacturer, we may have to expand our third-party manufacturing capacity. We cannot assure that this additional capacity will be available when required on terms that are acceptable to us or similar to existing terms, which we have with our manufacturers, either from a production standpoint or a financial standpoint. We enter into a number of purchase order commitments specifying a time for delivery, method of payment, design and quality specifications and other standard industry provisions, but do not have long-term contracts with any manufacturer. None of the manufacturers we use produce our products exclusively. Should we be forced to replace one or more of our manufacturers, we may experience increased costs or an adverse operational impact due to delays in distribution and delivery of our products to our patients, which could cause us to lose patients or lose revenue because of late shipments. We are a relatively small company with a limited number of products and staff. Sales fluctuations and employee turnover may adversely affect our business. We are a relatively small company. Consequently, compared to larger companies, sales fluctuations could have a greater impact on our revenue and profitability on a quarter-to-quarter and year-to-year basis and delays in patient orders could cause our operating results to vary significantly from quarter to quarter and year-to-year. In addition, as a small company we have limited staff and are heavily reliant on certain key personnel to operate our business. If a key employee were to leave the company it could have a material impact on our business and results of operations as we might not have sufficient depth in our staffing to fill the role that was previously being performed. A delay in filling the vacated position could put a strain on existing personnel or result in a failure to satisfy our contractual obligations or to effectively implement our internal controls, and materially harm our business. If we are unable to retain the services of Mr. Sandgaard or if we are unable to successfully recruit qualified managerial and sales personnel, we may not be able to continue our operations. Our success depends to a significant extent upon the continued service of Mr. Thomas Sandgaard, our Chief Executive Officer, Founder, and beneficial owner of approximately 38% of our outstanding stock. Loss of the services of Mr. Sandgaard could have a material adverse effect on our growth, revenues, and prospective business. There is currently no employment agreement with Mr. Sandgaard. We do not maintain key-man insurance on the life of Mr. Sandgaard. In addition, in order to successfully implement and manage our business plan, we will be dependent upon, among other things, successfully retaining and recruiting qualified managerial and sales personnel. Competition for qualified individuals is intense. Various factors, such as marketability of our products, our reputation, our liquidity, and sales commission structure can affect our ability to find, attract or retain sales personnel. There can be no assurance that we will be able to find and attract qualified new employees and sales representatives and retain existing employees and sales representatives. We need to maintain insurance coverage, which could become very expensive or have limited availability. Our marketing and sales of medical device products creates an inherent risk of claims for product liability. As a result, we carry product liability insurance and will continue to maintain insurance in amounts we consider adequate to protect us from claims. We cannot, however, be assured that we have resources sufficient to satisfy liability claims in excess of policy limits if required to do so. Also, if we are subject to such liability claims, there is no assurance that our insurance provider will continue to insure us at current levels or that our insurance rates will not substantially rise in the future, resulting in increased costs to us or forcing us to either pay higher premiums or reduce our coverage amounts, which would result in increased liability to claims. 16 Table of Contents We depend upon obtaining regulatory approval of any new products and/or manufacturing operations we develop and maintain approvals of current products; failure to obtain or maintain such regulatory approvals could result in increased costs, lost revenue, penalties and fines. Before marketing any new products, we will need to complete one or more clinical investigations of each product. There can be no assurance that the results of such clinical investigations will be favorable to us. We may not know the results of any study, favorable or unfavorable to us, until after the study has been completed. Such data must be submitted to the FDA as part of any regulatory filing seeking approval to market the product. Even if the results are favorable, the FDA may dispute the claims of safety, efficacy, or clinical utility and not allow the product to be marketed. The sales price of the product may not be enough to recoup the amount of our investment in conducting the investigative studies and we may expend significant funds on research and development on products that are rejected by the FDA. Some of our products are marketed based upon our interpretation of FDA regulation allowing for changes to an existing device. If our interpretations are incorrect, we could suffer consequences that could have a material adverse effect on our results of operations and cash flows and could result in fines and penalties. There can be no assurance that we will have the financial resources to complete development of any new products or to complete the regulatory approval process or to maintain regulatory compliance of existing products. We may not be able to obtain clearance of a 510(k) notification or approval of a de novo or pre-market approval application with respect to any products on a timely basis, if at all. If timely FDA clearance or approval of new products is not obtained, our business could be materially adversely affected. Clearance of a 510(k) notification or de novo application may also be required before marketing certain previously marketed products, which have been modified after they have been cleared. Should the FDA so require, the filing of a new 510(k) notification for the modification of the product may be required prior to marketing any modified device. To determine whether adequate compliance has been achieved, the FDA may inspect our facilities at any time. Such compliance can be difficult and costly to achieve and maintain. Our compliance status may change due to future changes in, or interpretations of, FDA regulations or other regulatory agencies. Such changes may result in the FDA withdrawing marketing clearance or requiring product recall. In addition, any changes or modifications to a device or its intended use may require us to reassess compliance with good manufacturing practices guidelines, potentially interrupting the marketing and sale of products. We may also fail to comply with complex FDA regulations due to their complexity or otherwise. Failure to comply with regulations could result in enforceable actions, including product seizures, product recalls, withdrawal of clearances or approvals, and civil and criminal penalties, any of which could have a material adverse effect on our operating results and reputation. Our products are subject to recall even after receiving FDA or foreign clearance or approval, which would harm our reputation and business. We are subject to medical device reporting regulations that require us to report to the FDA or respective governmental authorities in other countries if our products cause or contribute to a death or serious injury or malfunction in a way that would be reasonably likely to contribute to death or serious injury if the malfunction were to recur. The FDA and similar governmental authorities in other countries have the authority to require the recall of our products in the event of material deficiencies or defects in design or manufacturing. A government mandated or voluntary recall by us could occur as a result of component failures, manufacturing errors or design defects, including defects in labeling. Any recall would divert managerial and financial resources and could harm our reputation with customers. We cannot assure you that we will not have product recalls in the future or that such recalls would not have a material adverse effect on our business. We have not undertaken any voluntary or involuntary recalls to date. We continue to incur expenses. This area of medical device research is subject to rapid and significant technological changes. Developments and advances in the medical industry by either competitors or other parties can affect our business in either a positive or negative manner. Developments and changes in technology that are favorable to us may significantly advance the potential of our research while developments and advances in research methods outside of the methods we are using may severely hinder, or halt completely our development. 17 Table of Contents We are a small company in terms of employees, technical and research resources. We expect to incur research and development, sales and marketing, and general and administrative expenses. These amounts may increase, and recently have in connection with our efforts to expand our sales force, before any commensurate incremental revenue from these efforts may be obtained and may adversely affect our potential profits and we may lack the liquidity to pay for such expenditures. These factors may also hinder our ability to meet changes in the medical industry as rapidly or effectively as competitors with more resources. Substantial costs could be incurred defending against claims of infringement. Other companies, including competitors, may obtain patents or other proprietary rights that would limit, interfere with, or otherwise circumscribe our ability to make, use, or sell products. Should there be a successful claim of infringement against us and if we could not license the alleged infringed technology at a reasonable cost, our business and operating results could be adversely affected. There has been substantial litigation regarding patent and other intellectual property rights in the medical device industry. The validity and breadth of claims covered in medical technology patents involve complex legal and factual questions for which important legal principles remain unresolved. Any litigation claims against us, independent of their validity, may result in substantial costs and the diversion of resources with no assurance of success. Intellectual property claims could cause us to: ● Cease selling, incorporating, or using products that incorporate the challenged intellectual property; ● Obtain a license from the holder of the infringed intellectual property right, which may not be available on reasonable terms, if at all; and ● Re-design our products excluding the infringed intellectual property, which may not be possible. We may be unable to protect our trademarks, trade secrets and other intellectual property rights that are important to our business. We consider our trademarks, trade secrets, and other intellectual property an integral component of our success. We rely on trademark law and trade secret protection and confidentiality agreements with employees, customers, partners, and others to protect our intellectual property. Effective trademark and trade secret protection may not be available in every country in which our products are available. We obtained utility patents on the fluid monitoring system in 2021 and 2018 in the U.S. and in 2020 in Europe. We cannot be certain that we have taken adequate steps to protect our intellectual property, especially in countries where the laws may not protect our rights as fully as in the United States. In addition, if our third-party confidentiality agreements are breached, there may not be an adequate remedy available to us. If our trade secrets become publicly known, we may lose competitive advantages. We may fail to protect the privacy, integrity and security of customer information. We possess and process sensitive customer information and Protected Health Information protected by the Health Insurance Portability and Affordability Act (“HIPAA”). While we have taken reasonable and appropriate steps to protect that information, if our security procedures and controls were compromised, it could harm our business, reputation, results of operations and financial condition and may increase the costs we incur to protect against such information security breaches, such as increased investment in technology, the costs of compliance with health care privacy and consumer protection laws. A compromise of our privacy or security procedures could also subject us to liability under certain health care privacy laws applicable to us. Cyber-attacks and security vulnerabilities could lead to reduced revenue, increased costs, liability claims, or harm to our competitive position. Increased sophistication and activities of perpetrators of cyber-attacks have resulted in an increase in information security risks in recent years. Hackers develop and deploy viruses, worms, and other malicious software programs that attack products and services and gain access to networks and data centers. If we experience difficulties maintaining existing systems or implementing new systems, we could incur significant losses due to disruptions in our operations. Additionally, these systems contain valuable proprietary and confidential information and may contain personal data of our customers. A security breach could result in disruptions of our internal systems and business applications, harm to our competitive position from the compromise of confidential business information, or subject us to liability under laws that protect personal data. As cyber threats continue to evolve, we may be required to expend additional resources to continue to enhance our information security measures and/or to investigate and remediate any information security vulnerabilities. Any of these consequences would adversely affect our revenue and margins. 18 Table of Contents Expansion of our operations and sales internationally may subject us to additional risks, including risks associated with unexpected events. A component of our growth strategy is to expand our operations and sales internationally. There can be no assurance that we will be able to successfully market, sell, and deliver our products in foreign markets, or that we will be able to successfully expand our international operations. Global operations could cause us to be subject to unexpected, uncontrollable and rapidly changing risks, events, and circumstances. The following factors, among others, could adversely affect our business, financial condition and results of operations: ● difficulties in managing foreign operations and attracting and retaining appropriate levels of senior management and staffing; ● longer cash collection cycles; ● proper compliance with local tax laws which can be complex and may result in unintended adverse tax consequences; ● difficulties in enforcing agreements through foreign legal systems; ● failure to properly comply with U.S. and foreign laws and regulations applicable to our foreign activities including, without limitation, product approval, healthcare and employment law requirements and the Foreign Corrupt Practices Act; ● fluctuations in exchange rates that may affect product demand and may adversely affect the profitability in U.S. dollars of the products we provide in foreign markets; ● the ability to efficiently repatriate cash to the United States and transfer cash between foreign jurisdictions; and ● changes in general economic conditions or political circumstances in countries where we operate. Our acquisition of other companies could require significant management attention, disrupt our business, dilute stockholder value and adversely affect our operating results. As part of our business strategy, we recently made and may in the future acquire or make investments in other companies, solutions or technologies to, among other reasons, expand or enhance our product offerings. In the future, any significant acquisition would require the consent of our lenders. Any failure to receive such consent could delay or prohibit us from acquiring companies that we believe could enhance our business. We may not ultimately strengthen our competitive position or achieve our goals from our recent or any future acquisition, and any acquisitions we complete could be viewed negatively by users, customers, partners or investors. In addition, if we fail to integrate successfully such acquisitions, or the technologies associated with such acquisitions, into our company, the revenues and operating results of the combined company could be adversely affected. For example, we recently acquired Kestrel Labs, Inc. and we must effectively integrate the personnel, products, technologies and customers and develop and motivate new employees. In addition, we may not be able to successfully retain the customers and key personnel of such acquisitions over the longer term, which could also adversely affect our business. The integration of our recently-acquired business or future-acquired business will require significant time and resources, and we may not be able to manage the process successfully. We may not successfully evaluate or utilize the acquired business and accurately forecast the financial impact of the acquisition, including accounting charges. 19 Table of Contents We may have to pay cash, incur debt or issue equity securities to pay for any acquisition, each of which could affect our financial condition or the value of our capital stock. For example, in connection with our acquisition of Kestrel Labs, Inc., we paid an approximate value of $30.5 million, consisting of $16.1 million in cash which was financed through Bank of America N.A. and approximately $14.4 million in Zynex common stock, a portion of which is held in escrow until certain milestones are achieved. To fund any future acquisition, we may issue equity, which would result in dilution to our stockholders, or incur more debt, which would result in increased fixed obligations and could subject us to additional covenants or other restrictions that would impede our ability to manage our operations. If we are not able to integrate acquired businesses successfully, our business could be harmed. Our inability to successfully integrate our recent and future acquisitions could impede us from realizing all of the benefits of those acquisitions and could severely weaken our business operations. The integration process may disrupt our business and, if implemented ineffectively, may preclude realization of the full benefits expected by us and could harm our results of operations. In addition, the overall integration of the combining companies may result in unanticipated problems, expenses, liabilities, and competitive responses, and may cause our stock price to decline. The difficulties of integrating an acquisition include, among others: ● unanticipated issues in integration of information, communications, and other systems; ● unanticipated incompatibility of logistics, marketing, and administration methods; ● maintaining employee morale and retaining key employees; ● integrating the business cultures of both companies; ● preserving important strategic client relationships; ● consolidating corporate and administrative infrastructures and eliminating duplicative operations; and ● coordinating geographically separate organizations. In addition, even if the operations of an acquisition are integrated successfully, we may not realize the full benefits of the acquisition, including the synergies, cost savings, or growth opportunities that we expect. These benefits may not be achieved within the anticipated time frame, or at all. For example, the failure to get regulatory approval to sell certain products of an acquired business may significantly reduce the anticipated benefits of the acquisition and could harm our results of operations, even if we have put in place contingencies for the delivery of closing consideration, such as the escrowed shares held back in our acquisition of Kestrel Labs, Inc. Further, acquisitions may also cause us to: ● issue securities that would dilute our current stockholders’ ownership percentage; ● use a substantial portion of our cash resources; ● increase our interest expense, leverage, and debt service requirements if we incur additional debt to pay for an acquisition; ● assume liabilities, including environmental liabilities, for which we do not have indemnification from the former owners or have indemnification that may be subject to dispute or concerns regarding the creditworthiness of the former owners; ● record goodwill and non-amortizable intangible assets that are subject to impairment testing on a regular basis and potential impairment charges; ● experience volatility in earnings due to changes in contingent consideration related to acquisition liability estimates; ● incur amortization expenses related to certain intangible assets; ● lose existing or potential contracts as a result of conflict of interest issues; ● incur large and immediate write-offs; or ● become subject to litigation. Our failure to comply with the covenants contained in our loan agreement could result in an event of default that could adversely affect our financial condition and ability to operate our business as planned. We currently have an outstanding term loan and line of credit with Bank of America, N.A. under which we are obligated to pay monthly amortization payments. Our loan agreement contains, and any agreements to refinance our debt likely will contain, financial and restrictive covenants. Our failure to comply with these covenants in the future may result in an event of default, which if not cured or waived, could result in the bank preventing us from accessing availability under our line of credit and requiring us to repay any outstanding borrowings. There can be no assurance that we will be able to obtain waivers in the event of covenant violations or that such waivers will be available on commercially acceptable terms. 20 Table of Contents In addition, the indebtedness under our loan agreement is secured by a security interest in substantially all of our tangible and intangible assets, and therefore, if we are unable to repay such indebtedness the bank could foreclose on these assets and sell the pledged equity interests, which would adversely affect our ability to operate our business. If any of these were to occur, we may not be able to continue operations as planned, implement our planned growth strategy or react to opportunities for or downturns in our business. Changes in financial accounting standards or practices may cause adverse, unexpected financial reporting fluctuations and affect our reported results of operations. We are required to prepare our financial statements in accordance with generally accepted accounting principles in the United States of America (“GAAP”), which is periodically revised and/or expanded. From time to time, we are required to adopt new or revised accounting standards issued by recognized authoritative bodies, including the Financial Accounting Standards Board (“FASB”) and the SEC. It is possible that future accounting standards we are required to adopt may require additional changes to the current accounting treatment that we apply to our financial statements and may require us to make significant changes to our reporting systems. Such changes could result in a material adverse impact on our business, results of operations and financial condition. RISKS RELATING TO OUR COMMON STOCK Sales of significant amounts of shares held by Mr. Sandgaard, or the prospect of these sales, could adversely affect the market price of our common stock Sales of significant amounts of shares held by Mr. Sandgaard, or the prospect of these sales, could adversely affect the market price of our common stock. Mr. Sandgaard’s stock ownership may discourage a potential acquirer from making a tender offer or otherwise attempting to obtain control of the Company, which in turn could reduce our stock price or prevent our stockholders from realizing a premium over our stock price. Our existing shareholders may experience dilution if we elect to raise equity capital Due to our past liquidity issues, we have had to raise capital in the form of debt and/or equity to meet our working capital needs. As recent as July 2020, we did raise capital through the issuance of equity to meet our working capital needs and to execute on our business strategy. We may also choose to issue equity or debt securities in the future to meet our liquidity or other needs which would result in additional dilution to our existing stockholders. Although we will attempt to minimize the dilutive impact of any future capital-raising activities, we cannot offer any assurance that we will be able to do so. We may have to issue additional shares of our common stock at prices at a discount from the then-current market price of our common stock. If we raise additional working capital, existing shareholders may experience dilution. We paid a dividend on our common stock, and cash used to pay dividends will not be available for other corporate purposes In 2018, our Board of Directors declared a special one-time dividend of $0.07 per share, which was paid in January 2019. In 2021, our Board of Directors declared a special one-time dividend of $0.10 per share, which was paid in January 2022. The decision to pay dividends in the future will depend on general business conditions, the impact of such payment on our financial condition, and other factors our Board of Directors may consider. If we elect to pay future dividends, this could reduce our cash reserves to levels that may be inadequate to fund expansions to our business plan or unanticipated contingent liabilities. Our stock price could become more volatile and your investment could lose value. All of the factors discussed in this section could affect our stock price. A significant drop in our stock price could also expose us to the risk of securities class actions lawsuits, which could result in substantial costs and divert management’s attention and resources, which could adversely affect our business ITEM 1B. UNRESOLVED STAFF COMMENTS None. 21 Table of Contents ITEM 2. PROPERTIES In October 2017, we signed a lease for a corporate headquarters in Englewood, Colorado beginning in January 2018. In March 2019, we signed an amendment to this lease, which allowed the Company to expand its corporate offices. An additional amendment was entered into on January 3, 2020 which expanded our corporate offices to approximately 85,681 square feet. During 2021, we moved our corporate headquarters to a new location, however, we continue to use the leased property for ZMS operations. The lease and subsequent amendments continue through June 30, 2023 with an option for a two-year extension through June 2025. In addition to our corporate headquarters, we entered into a lease agreement for a warehouse and production facility with approximately 50,488 square feet in September 2020. The lease continues through June 2026 with an option for a five-year extension through June 2031. In April 2021, we signed a sublease for a new corporate headquarters in Englewood, Colorado beginning in May 2021 for up to approximately 110,754 square feet. This lease runs through April 2028. We believe these leased properties are sufficient to support our current requirements and that we will be able to locate additional facilities as needed. See Note 11 to the Consolidated Financial Statements for additional information on these leases. ITEM 3. LEGAL PROCEEDINGS We are not a party to any material pending legal proceedings. ITEM 4. MINE SAFETY DISCLOSURES Not applicable. PART II ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES On February 12, 2019, our common stock began trading on The Nasdaq Capital Market under the symbol “ZYXI”. Prior to uplisting to the Nasdaq Capital Market, the Company’s common stock was quoted on the OTCQB (managed by OTC Markets, Inc) under the symbol “ZYXI.” As of March 18, 2022, there were 39,784,068 shares of common stock outstanding and approximately 267 record holders of our common stock. Recent Sales of Unregistered Securities None. Purchases of Equity Securities by the Issuer and Affiliated Purchasers None. Dividends Our Board of Directors declared a one-time special cash dividend of $0.07 per share during the fourth quarter of 2018, which was paid in January 2019 and a one-time cash dividend of $0.10 per share and a 10% stock dividend during the fourth quarter of 2021, which was paid out and issued in January 2022. There can be no guarantee that we will continue to pay dividends. Any future determination to pay cash dividends will be at the discretion of the Board of Directors and will be dependent upon our financial condition, results of operations, capital requirements and such other factors as the Board deems relevant. 22 Table of Contents ITEM 6. [RESERVED] Not required. ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS This Annual Report on Form 10-K contains statements that are forward-looking, such as statements relating to plans for future organic growth and other business development activities, as well as the impact of reimbursement trends, other capital spending and financing sources. Such forward-looking information involves important risks and uncertainties that could significantly affect anticipated results in the future and, accordingly, such results may differ from those expressed in any forward-looking statements made by or on behalf of the Company. These risks include the ability to engage effective sales representatives, the need to obtain FDA clearance and CE marking of new products, the acceptance of new products as well as existing products by doctors and hospitals, our dependence on the reimbursement from insurance companies for products sold or leased to our customers, acceptance of our products by health insurance providers for reimbursement, larger competitors with greater financial resources, the need to keep pace with technological changes, our dependence on third-party manufacturers to produce key components of our products on time and to our specifications, implementation of our sales strategy including a strong direct sales force, and other risks described herein and included in “Item 1A-Risk Factors.” OVERVIEW We operate in one primary business segment, electrotherapy and pain management products. As of December 31, 2021, the Company’s only active subsidiary is ZMI, a wholly-owned Colorado corporation, through which the Company conducts its U.S. electrotherapy and pain management operations. ZMS, a wholly-owned Colorado corporation, has developed a fluid monitoring system, which has received two utility patents and FDA approval in the U.S. ZMS also acquired Kestrel during 2021, which had two pulse-oximeter products they are developing and numerous patents. However, ZMS has achieved no revenues to date. The following information should be read in conjunction with our Consolidated Financial Statements and related notes contained in this Annual Report. HIGHLIGHTS During the year ended December 31, 2021, the Company achieved the following: ZMI ● Achieved an 89% increase in order growth, 63% growth in revenue and 88% growth in net income compared to the prior year; ● Due to strong results and related cash flow, we declared a $0.10 cash dividend and a 10% stock dividend in November 2021; ● We moved into a larger corporate office to accommodate order and revenue growth by increasing staffing at the corporate level; and ● Expanded our pain management product line by adding knee braces. 23 Table of Contents ZMS ● Filed for FDA approval of the CM-1600 laser-based fluid monitoring system; and ● Acquired Kestrel Labs, Inc. on December 22, 2021 for an approximate value of $30.5 million, consisting of $16.1 million in cash which is being financed through Bank of America N.A. and approximately $14.4 million in Zynex common stock. SUMMARY Net revenue increased 63% in 2021 to $130.3 million from $80.1 million in 2020. Net income was $17.1 million and $9.1 million for the years ended December 31, 2021, and 2020, respectively. We generated cash flows from operating activities of $6.9 million during the year ended December 31, 2021. Increased orders for our devices and supplies and the related receivables and cash flows, which allowed us to grow our working capital at December 31, 2021 to $59.8 million, compared to $52.9 million as of December 31, 2020. RESULTS OF OPERATIONS The following table presents our consolidated statements of operations in comparative format (in thousands). NET REVENUE Devices Supplies Total net revenue COSTS OF REVENUE AND OPERATING EXPENSES Costs of revenue – devices and supplies Sales and marketing General and administrative Total costs of revenue and operating expenses Income from operations Other income/(expense) Loss on disposal of non-controlling interest Interest expense Other income/(expense), net Income from operations before income taxes Income tax expense Net Income Net income per share: Basic Diluted Weighted average basic shares outstanding Weighted average diluted shares outstanding 24 For the Years Ended December 31, 2021 2020 $ change $ $ 36,613 93,688 130,301 $ 21,269 58,853 80,122 27,321 54,290 26,324 107,935 22,366 — (95) (95) 22,271 5,168 17,103 0.45 0.44 38,317 39,197 $ $ $ $ $ $ 17,417 34,133 18,323 69,873 10,249 (77) (19) (96) 10,153 1,079 9,074 0.24 0.24 37,256 38,438 $ $ $ 15,344 34,835 50,179 9,904 20,157 8,001 38,062 12,117 77 (76) 1 12,118 4,089 8,029 0.20 0.20 1,061 759 Table of Contents The following table presents our consolidated statements of operations reflected as a percentage of total revenue: NET REVENUE Devices Supplies Total net revenue COSTS OF REVENUE AND OPERATING EXPENSES Costs of revenue – devices and supplies Sales and marketing General and administrative Total costs of revenue and operating expenses Income from operations Other income/(expense) Loss on disposal of non-controlling interest Interest expense Other income/(expense), net Income from operations before income taxes Income tax expense Net Income Net income per share: Basic Diluted Weighted average basic shares outstanding Weighted average diluted shares outstanding Net Revenue For the Years Ended December 31, 2021 2020 28 % 72 % 100 % 21 % 42 % 20 % 83 % 17 % 0 % 0 % 0 % 17 % 4 % 14 % 27 % 73 % 100 % 22 % 43 % 23 % 87 % 13 % 0 % 0 % 0 % 13 % 1 % 11 % 0.45 0.44 38,317 39,197 0.24 0.24 37,256 38,438 Net revenues are comprised of device and supply sales, constrained by estimated third-party payer reimbursement deductions. The reserve for billing allowance adjustments and allowance for uncollectible accounts are adjusted on an ongoing basis in conjunction with the processing of third-party payer insurance claims and other customer collection history. Product device revenue is primarily comprised of sales and rentals of our electrotherapy products and also includes complementary products such as our cervical traction, lumbar support and hot/cold therapy products. Supplies revenue is primarily comprised of sales of our consumable supplies to patients using our electrotherapy products, consisting primarily of surface electrodes and batteries. Revenue related to both devices and supplies is reported net, after adjustments for estimated third-party payer reimbursement deductions and estimated allowance for uncollectible accounts. The deductions are known throughout the health care industry as billing adjustments whereby the healthcare insurers unilaterally reduce the amount they reimburse for our products as compared to the sales prices charged by us. The deductions from gross revenue also take into account the estimated denials, net of resubmitted billings of claims for products placed with patients which may affect collectability. See our Significant Accounting Policies in Note 2 to the Consolidated Financial Statements for a more complete explanation of our revenue recognition policies. 25 Table of Contents We occasionally receive, and expect to continue to receive, refund requests from insurance providers relating to specific patients and dates of service. Billing and reimbursement disputes are very common in our industry. These requests are sometimes related to a few patients and other times include a significant number of refund claims in a single request. We review and evaluate these requests and determine if any refund is appropriate. We also review claims that have been resubmitted or where we are pursuing additional reimbursement from that insurance provider. We frequently have significant offsets against such refund requests which may result in amounts that are due to us in excess of the amounts of refunds requested by the insurance providers. Therefore, at the time of receipt of such refund requests we are generally unable to determine if a refund request is valid. Net revenue increased $50.2 million or 63% to $130.3 million for the year ended December 31, 2021, from $80.1 million for the year ended December 31, 2020. The growth in net revenue is primarily related to the 89% growth in device orders which led to an increased customer base and drove higher sales of consumable supplies. Device Revenue Device revenue is related to the purchase or lease of our electrotherapy products as well as complementary products including cervical traction, lumbar support and hot/cold therapy products. Device revenue increased $15.3 million or 72% to $36.6 million for the year ended December 31, 2021, from $21.3 million for the year ended December 31, 2020. The increase in device revenue is related to the growth in our device and complementary product orders of 89% from 2020 to 2021 as a result of greater sales representative productivity. Supplies Revenue Supplies revenue is related to the sale of supplies, typically electrodes and batteries, for our products. Supplies revenue increased $34.8 million or 59% to $93.7 million for the year ended December 31, 2021, from $58.9 million for the year ended December 31, 2020. The increase in supplies revenue is primarily related to growth in our customer base from higher device sales in 2021 and prior years. Operating Expenses Costs of Revenue –Devices and Supplies Costs of revenue – devices and supplies consist primarily of device and supplies costs, operations labor and overhead, shipping and depreciation. Costs of revenue increased $9.9 million or 57% to $27.3 million for the year ended December 31, 2021, from $17.4 million for the year ended December 31, 2020. The increase in costs of revenue is directly related to the increase in device and supplies orders as well as our new production and inventory facility which opened in January 2021. As a percentage of revenue, cost of revenue –devices and supplies decreased to 21% for the year ended December 31, 2021 compared to 22% for the year ended December 31, 2020. The decrease in cost of revenue – devices and supplies as a percentage of revenue was due to expanding our supplier portfolio mix and reducing supply costs. Sales and Marketing Expense Sales and marketing expense primarily consists of employee-related costs, including commissions and other direct costs associated with these personnel including travel and marketing expenses. Sales and marketing expense for the year ended December 31, 2021 increased 59% to $54.3 million from $34.1 million for the year ended December 31, 2020. The increase in sales and marketing expense is primarily due to increased payroll costs, related to increased average direct sales reps during the year and a full year of our regional sales managers which we began adding in 2020. We also increased our internal sales support functions to assist patients during the sales process. Increased orders resulted in higher sales commissions as well as travel expenses. As a percentage of revenue, sales and marketing expense decreased to 42% for the year ended December 31, 2021 from 43% for the year ended December 31, 2020. The decrease as a percentage of revenue is primarily due to the increase in revenue and our sales force becoming more productive. 26 Table of Contents General and Administrative Expense General and administrative expense primarily consists of employee related costs, facilities expense, professional fees and depreciation and amortization. General and administrative expense for the year ended December 31, 2021 increased 44% to $26.3 million from $18.3 million for the year ended December 31, 2020. The increase in general and administrative expense is primarily due to the following: ● an increase of $3.3 million in compensation and benefits expense, including non-cash stock compensation expense, related to headcount growth in ZMI and $0.7M in ZMS. During 2021, the Company increased its average employee headcount for its billing and patient support activities by approximately 55%, or 96 employees; ● an increase of $2.6 million in other expenses, including professional fees, research and development supplies, sales tax, temporary labor costs and other general and administrative costs associated with the increase in order volumes; and ● an increase of $1.1 million in rent and facilities expenses as we entered into a new corporate headquarters lease during 2021. Much of the increase in facilities was non-cash as we received 21 months of free rent on the new corporate headquarters but for GAAP purposes the rent over the lease term is expensed on a straight-line basis. As a percentage of revenue, general and administrative expense decreased to 20% for the year ended December 31, 2021 from 23% for the year ended December 31, 2020. The decrease as a percentage of revenue is primarily due to increased revenue and leveraging our investment in general and administrative functions from prior years. The Company expects that general and administrative expenses will continue to increase through 2022 as the Company continues to expand its corporate headcount to accommodate continued order growth. Other Income (Expense) Other expense was $95,000 for the year ended December 31, 2021, of which $41,000 was related to interest on our finance lease obligations, $13,000 was related to interest on new debt. Other expense was $96,000 for the year ended December 31, 2020. Income Tax Expense We recorded income tax expense of $5.2 million and $1.1 million for the years ended December 31, 2021 and 2020, respectively. The effective income tax rate for the years ended December 31, 2021 and 2020 was 24% and 10%, respectively. The increase in expense and effective rate during 2021 is primarily due to a decrease in deductions related to stock option exercises. During 2021, discrete items related to stock-based compensation was $0.2 million as compared with $1.7 million in 2020. FINANCIAL CONDITION As of December 31, 2021, we had working capital of $59.8 million, compared to $52.9 million as of December 31, 2020. The increase in working capital is primarily due to the Company’s profitability from increased orders and related revenue during 2021. The increase in working capital is net of a cash dividend declared of $3.6 million which was paid in January 2022. We generated $6.9 million in operating cash flows during 2021. LIQUIDITY AND CAPITAL RESOURCES We have historically financed operations through cash flows from operations, debt and equity transactions. As of December 31, 2021, our principal source of liquidity was $42.6 million in cash and $28.6 million in accounts receivables. The increased cash balance at December 31, 2021 was primarily due to the profitability during the year as a result of increased orders and improved sales rep productivity. 27 Table of Contents Upon closing on the Kestrel acquisition we entered into a loan and credit facility agreement with Bank of America, N.A. The credit facility includes a line of credit in the amount of $4.0 million available until December 1, 2024. The loan is a fixed rate term loan in the amount of $16.0 million and has an interest rate equal to 2.8% per year. The term loan is payable in equal principal installments of $444,444 per month through December 1, 2024 plus interest on the first day of each month beginning January 1, 2022. See Note 7. Our anticipated uses of cash in the future will be to fund the expansion of our business. The Company does not anticipate any large expenditures for capital resources over the next 12 months. Net cash provided by operating activities for the years ended December 31, 2021 and 2020 was $6.9 million and $0.8 million, respectively. The increase in cash provided by operating activities for the year ended December 31, 2021 was primarily due to increased profitability in 2021 and an increase in non-cash lease expense and depreciation. The increase in cash provided by operating activities was partially offset by an increase in AR and Inventory. Cash provided by operating activities for the year ended December 31, 2020 was primarily due to profitability, which was offset by increased accounts receivable due to revenue growth. Net cash used in investing activities for the years ended December 31, 2021 and 2020 was $16.6 million and $1.0 million, respectively. Cash used in investing activities for the year ended December 31, 2021 was primarily related to the acquisition of Kestrel and the purchase of computer, office and warehouse equipment. Cash used in investing activities for the year ended December 31, 2020 was primarily related to the purchase of computer and office equipment. Net cash provided by financing activities for the year ended December 31, 2021 was $13.1 million compared with net cash provided by financing activities of $25.3 million for the year ended December 31, 2020. The cash provided by financing activities of $13.1 million for the year ended December 31, 2021 was primarily due to net proceeds from debt assumed in the Kestrel acquisition of $16.0 million, which is slightly offset by the purchase of treasury stock totaling $2.7 million. The $25.3 million of cash provided by financing activities for the year ended December 31, 2020 was primarily due to an equity offering in July 2020 for net proceeds of $25.2 million along with net proceeds from the exercise of stock options of $0.1 million. During 2021 there was no equity offering. We believe our cash, together with anticipated cash flow from operations will be sufficient to meet our working capital, and capital expenditure requirements for at least the next twelve months. In making this assessment, we considered the following: ● Our cash balance at December 31, 2021 of $42.6 million; ● Our working capital balance of $59.8 million; ● Our accounts receivable balance of $28.6 million: ● Our increasing profitability over the last 6 years; and ● Our planned capital expenditures of less than $1.0 million during 2022. 28 Table of Contents Contractual Obligations The following table summarizes the future cash disbursements to which we are contractually committed as of December 31, 2021 (in thousands). Operating leases Finance leases Total 21,190 513 2022 3,569 154 2023 2,982 152 2024 3,496 116 2025 3,567 76 $ 21,703 $ 3,723 $ 3,134 $ 3,612 $ 3,643 $ 3,377 2026 3,362 15 Thereafter 4,214 — 4,214 $ We lease office and warehouse facilities under non-cancelable operating leases. The current office facility leases include our corporate headquarters and a production warehouse, both located in Englewood, Colorado. We also rent a small warehouse/office in Denmark. Rent expense was $3.5 million and $1.7 million for the years ended December 31, 2021 and 2020, respectively. A portion of the increase in facilities was non-cash as we received 21 months of free rent on the new corporate headquarters but for GAAP purposes the rent over the lease term is expensed on a straight-line basis. The Company also leases office equipment for its corporate and warehouse facilities under non-cancelable finance lease agreements. Off – Balance Sheet Arrangements As of December 31, 2021, and 2020, we had no off-balance sheet arrangements or obligations. CRITICAL ACCOUNTING POLICIES Our discussion and analysis of our financial condition and results of operations are based upon our financial statements, which have been prepared in accordance with GAAP. We have identified the policies below as critical to our business operations and the understanding of our results of operations. Revenue Recognition and Accounts Receivable Revenue is generated primarily from sales and leases of our electrotherapy devices and related supplies and complementary products. Sales are primarily made with, and shipped, direct to the patient with a small amount of revenue generated from sales to distributors. In the healthcare industry there is often a third party involved that will pay on the patients’ behalf for purchased or leased devices and supplies. The terms of the separate arrangement impact certain aspects of the contract with patients covered by third party payers, such as contract type, performance obligations and transaction price, but for purposes of revenue recognition the contract with the customer refers to the arrangement between the Company and the patient. The Company does not have any material deferred revenue in the normal course of business as each performance obligation is met upon delivery of goods to the patient. Device Sales Device sales can be in the form of a purchase or a lease. Revenue for purchased devices is recognized in accordance with Accounting Standards Codification (“ASC”) 606 – “Revenue from Contracts with Customers” (ASC 606) when the device is delivered to the patient. 29 Table of Contents Revenue related to devices out on lease is recognized in accordance with ASC 842, Leases. Using the guidance in ASC 842, we concluded our transactions should be accounted for as operating leases based on the following criteria below: ● The lease does not transfer ownership of the underlying asset to the lessee by the end of the lease term. ● The lease does not grant the lessee an option to purchase the underlying asset that the lessee is reasonably certain to exercise. ● The lease term is month to month, which does not meet the major part of the remaining economic life of the underlying asset. However, if the commencement date falls at or near the end of the economic life of the underlying asset, this criterion shall not be used for purposes of classifying the lease. ● There is no residual value guaranteed and the present value of the sum of the lease payments does not equal or exceed substantially all of the fair value of the underlying asset ● The underlying asset is expected to have alternative uses to the lessor at the end of the lease term. Lease commencement occurs upon delivery of the device to the patient. The Company retains title to the leased device and those devices are classified as property and equipment on the balance sheet. Since our leases are month-to-month and can be returned by the patient at any time, revenue is recognized monthly for the duration of the period in which the patient retains the device. Supplies Supplies revenue is recognized once delivered to the patient. Supplies needed for the device can be set up as a recurring shipment or ordered through the customer support team or online store as needed. Variable consideration A significant portion of the Company’s revenues are derived, and the related receivables are due, from patients with commercial or government health insurance plans. Revenues are estimated using the portfolio approach by third party payer type based upon historical rates of collection, the aging of receivables, trends in the historical reimbursement rates by third-party payer types and current relationships and experience with the third-party payers, which includes estimated constraints for third-party payer refund requests, deductions and adjustments. Inherent in these estimates is the risk that they will have to be revised as additional information becomes available and constraints are released. Specifically, the complexity of third-party billing arrangements and the uncertainty of reimbursement amounts for certain products from third-party payers or unanticipated requirements to refund payments previously received may result in adjustments to amounts originally recorded. Due to continuing changes in the health care industry and third-party payer reimbursement, it is possible our forecasting model to estimate collections could change, which could have an impact on our results of operations and cash flows. Any differences between estimated settlements and final determinations are reflected as an increase or a reduction to revenue in the period when such final determinations are known. Historically these differences have been immaterial and the Company has not had to go back and reassess the adjustments of future periods for past billing adjustments. The Company monitors the variability and uncertain timing over third-party payer types in our portfolios. If there is a change in our third-party payer mix over time, it could affect our net revenue and related receivables. We believe we have a sufficient history of collection experience to estimate the net collectible amounts by third-party payer type. However, changes to constraints related to billing adjustments and refund requests have historically fluctuated and may continue to fluctuate significantly from quarter to quarter and year to year. 30 Table of Contents Stock-based Compensation The Company accounts for stock-based compensation through recognition of the cost of employee services received in exchange for an award of equity instruments, which is measured based on the grant date fair value of the award that is ultimately expected to vest during the period. The stock-based compensation expenses are recognized over the period during which an employee is required to provide service in exchange for the award (the requisite service period, which in the Company’s case is the same as the vesting period). For awards subject to the achievement of performance metrics, stock-based compensation expense is recognized when it becomes probable that the performance conditions will be achieved. Income Taxes Significant judgment is required in determining our provision for income taxes. We assess the likelihood that our deferred tax asset will be recovered from future taxable income, and to the extent we believe that recovery is not likely, we establish a valuation allowance. We consider future taxable income projections, historical results and ongoing tax planning strategies in assessing the recoverability of deferred tax assets. However, adjustments could be required in the future if we determine that the amount to be realized is less or greater than the amount that we recorded. Such adjustments, if any, could have a material impact on our results of our operations. We use a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. Acquisition Method of Accounting for Business Combinations We allocate the purchase price of acquired companies to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values. The excess of the purchase price over these fair values is recorded as goodwill. We engage independent third-party valuation specialists to assist us in determining the fair values of certain assets acquired and liabilities assumed. Such valuation require management to make significant estimates and assumptions, especially with respect to intangible assets. Different valuations approaches are used to value different types of intangible assets. Under the income approach, the relief from royalty method is a valuation technique which is used to estimate the value of certain intangible assets. This method utilizes projected financial information and hypothetical royalty rates to estimate the cost savings associated with asset ownership. The estimated cost savings are discounted for risk and the time value of money to estimate an intangible asset’s fair value. Management’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable. If we do not achieve the results reflected in the assumptions and estimates, our goodwill impairment evaluations could be adversely affected, and we may impair a portion or all of our intangible assets, which would adversely affect our operating results in the period of impairment. Impairment of Long-lived Assets, including Goodwill We assess impairment of goodwill annually and other long-lived assets when events or changes in circumstances indicates that their carrying value amount may not be recoverable. Long-lived assets consist of property and equipment, net and goodwill and intangible assets. Circumstances which could trigger a review include, but are not limited to: (i) significant decreases in the market price of the asset; (ii) significant adverse changes in the business climate or legal or regulatory factors; (iii) or expectations that the asset will more likely than not be sold or disposed of significantly before the end of its estimated useful life. If the estimated future undiscounted cash flows, excluding interest charges, from the use of an asset are less than the carrying value, a write-down would be recorded to reduce the related asset to its estimated fair value. Contingent considerations We classify contingent consideration liabilities related to business acquisitions within Level 3 as factors used to develop the estimated fair value are unobservable inputs that are not supported by market activity. We estimate the fair value of contingent consideration liabilities using a Monte Carlo simulation which is based on equity volatility, the risk-free rate, the normal variate, projected milestone dates, discount rates, and probabilities of payment. 31 Table of Contents ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK As a “Smaller Reporting Company”, this Item and the related disclosure is not required. ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA The consolidated financial statements, the notes thereto, and the report thereon of Plante & Moran, PLLC, are filed as part of this report starting on page F-1. ITEM 9. CHANGES IN ACCOUNTANTS None. ITEM 9A. CONTROLS AND PROCEDURES Evaluation of disclosure controls and procedures. We maintain “disclosure controls and procedures,” as such term is defined in Rule 13a- 15(e) and 15d-15(f) under the Securities Exchange Act of 1934 (the “Exchange Act”), that are designed to provide reasonable assurance that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Our management, with the participation of the Chief Executive Officer and the Chief 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. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of the end of such period. In designing and evaluating our disclosure controls and procedures, management recognized that disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the disclosure controls and procedures are met. Additionally, in designing disclosure controls and procedures, we are required to apply judgment in evaluating the cost- benefit relationship of possible disclosure controls and procedures. The design of any disclosure controls and procedures 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. Management’s 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). All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the 2013 framework set forth in the report entitled Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”). The COSO framework summarizes each of the components of a company’s internal control system, including (i) the control environment, (ii) risk assessment, (iii) control activities, (iv) information and communication, and (v) monitoring. Based on our evaluation under the 2013 framework in Internal Control — Integrated Framework, our management concluded that our internal control over financial reporting was effective as of December 31, 2021. Changes in Internal Control over Financial Reporting During the quarter ended December 31, 2021, there was no change in our internal control over financial reporting or in other factors that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting. 32 Table of Contents ITEM 9B. OTHER INFORMATION None. ITEM 9C. DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS Not applicable. ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE PART III The information required by this item will be included in the Proxy Statement, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of our fiscal year ended December 31, 2021 in connection with the solicitation of proxies for the Company’s 2022 annual meeting of shareholders and is incorporated herein by reference. ITEM 11. EXECUTIVE COMPENSATION The information required by this item will be included in the Proxy Statement, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of our fiscal year ended December 31, 2021 and is incorporated herein by reference. ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS. EQUITY COMPENSATION PLAN INFORMATION The following table provides information as of December 31, 2021 regarding shares of common stock available for issuance under our equity incentive plans (in thousands except exercise price) Plan Category 2005 Stock Option Plan (1) (2) Equity Compensation Plans not approved by Shareholders Warrants 2017 Stock Option Plan (3) Total Number of Securities to be Issued Upon Exercise of Outstanding Options, Warrants and Rights Weighted Average Exercise Price of Outstanding Options, Warrants and Rights Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (excluding securities reflected in the first column) $ 325 28 99 867 1,319 $ 0.27 0.22 2.40 1.09 0.97 — — 3,937 3,937 (1) All of these securities are available for issuance under the Zynex, Inc. 2005 Stock Option Plan, approved by the Board of Directors on January 3, 2005 and by our stockholders on December 30, 2005. (2) As of December 31, 2014, the 2005 Stock Option Plan was terminated. Termination of the plan did not affect the rights and obligations of the participants and the company arising under options previously granted. (3) The 2017 Stock Option Plan was approved by shareholders on June 1, 2017. The additional information required by this item will be included in the Proxy Statement, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of our fiscal year ended December 31, 2021 and is incorporated herein by reference. 33 Table of Contents ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE The information required by this item will be included in the Proxy Statement, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of our fiscal year ended December 31, 2021 and is incorporated herein by reference. The Board of Directors has determined that Messrs. Cress, Disbrow and Michaels who together comprise the Audit Committee, are all “independent directors” within the meaning of Rule 5605 of the NASDAQ Listing Rules. ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES The information required by this item will be included in the Proxy Statement, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of our fiscal year ended December 31, 2021 and is incorporated herein by reference. 34 Table of Contents Consolidated Financial Statements: PART IV ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES Report of Independent Registered Public Accounting Firm (Plante & Moran, PLLC, Denver, CO PCAOB firm ID 166) Consolidated Balance Sheets as of December 31, 2021 and 2020 Consolidated Statements of Income for the years ended December 31, 2021 and 2020 Consolidated Statements of Cash Flows for the years ended December 31, 2021 and 2020 Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2021 and 2020 Notes to Consolidated Financial Statements F-1 F-4 F-5 F-6 F-7 F-8 Exhibits: Exhibit Number 2.1 3.1 3.2 4.1 Asset Purchase Agreement, dated March 9, 2012, among Zynex NeuroDiagnostics, Inc., NeuroDyne Medical Corp. and the shareholders listed on Schedule A thereto (incorporated by reference to Exhibit 10.1 of the Company’s Current Report on Form 8-K filed on March 13, 2012) Description Amended and Restated Articles of Incorporation (incorporated by reference to Exhibit 10.1 of the Company’s Current Report on Form 8-K filed on October 7, 2008) Amended and Restated Bylaws (incorporated by reference to Exhibit 10.2 of the Company’s Current Report on Form 8-K filed on October 7, 2008) Zynex, Inc 2017 Stock Incentive Plan (incorporated by reference to Exhibit 4.1 to the Company’s Report on form S-8 filed on September 6, 2017) 4.2* Description of registrant’s securities registered pursuant to Section 12 of the Securities Exchange Act of 1934 10.1† 10.2† 10.3† 10.4 10.5 10.6 10.7 2005 Stock Option Plan (incorporated by reference to Exhibit 10.5 of the Company’s Annual Report on Form 10-KSB for the year ended December 31, 2004) Form of Indemnification Agreement for directors and executive officers (incorporated by reference to Exhibit 10.3 of the Company’s Current Report on Form 8-K filed on October 7, 2008) Employment agreement for Daniel J. Moorhead dated June 5, 2017 (incorporated by reference of Exhibit 10.1 to the Company’s Report on Form 8K filed on June 8, 2017) Office Lease, effective October 20, 2017, between CSG Systems, Inc. and Zynex Medical, Inc. (incorporated by reference to Exhibit 10.1 of the Company’s Report on Form 8-K filed on October 26, 2017). Zynex, Inc. Non-Employee Director Compensation Plan (incorporated by reference to Exhibit 10.1 to the Company’s Report on Form 8-K filed on January 11, 2018) Equity Distribution Agreement, dated October 29, 2019 between Zynex, Inc. and Piper Jaffray & Co. (incorporated by reference to Exhibit 1.1 of the Company’s Current Report on Form 8-K filed on October 29, 2019) Amendment to Sublease Agreement, effective January 3, 2020, between CSG Systems, Inc. and Zynex, Inc. (incorporated by reference to Exhibit 10.1 of the Company’s Report on Form 8-K filed on January 7, 2020 35 Table of Contents Exhibit Number 10.8 10.9 10.10 10.11 10.12 Underwriting Agreement dated July 14, 2020, among certain selling stockholders, Piper Sandler & Co., and Zynex, Inc. (incorporated by reference to Exhibit 10.1 of the Company’s Report on Form 8-K filed on July 17, 2020) Description Lease Agreement, effective September 30, 2020, between GIG CW Compark, LLC and Zynex, Inc. (incorporated by reference to Exhibit 10.1 of the Company’s Report on Form 8-K filed on October 6, 2020). Sublease Agreement between Zynex, Inc. and Cognizant Trizetto Software Group, Inc. dated April 8, 2021 (incorporated by reference to Exhibit 10.1 of the Company’s Report on Form 8-K filed on April 9, 2021) Stock Purchase Agreement by and among Kestrel Labs, Inc., Zynex Monitoring Solutions Inc., Zynex, Inc. and Selling Shareholders named herein dated as of December 22, 2021 (incorporated by reference to Exhibit 10.1 of the Company’s Report on Form 8-K filed on December 23, 2021) The Loan Agreement and accompanying documents dated December 22, 2021 among Bank of America N.A., Zynex Medical, Inc., and Zynex Monitoring Solutions (incorporated by reference to Exhibit 10.1 of the Company’s Report on Form 8-K filed on December 30, 2021) 36 Table of Contents Exhibit Number 21* Subsidiaries of the Company Description 23.1* Consent of Plante & Moran, PLLC, Independent Registered Public Accounting Firm (Filed herewith) 31.1* 31.2* 32.1* 32.2* Certification of Chief Executive Officer Pursuant to Rule 13a-14(a)/15d-14(a) as Adopted Pursuant to Section 302 of Sarbanes- Oxley Act of 2002 Certification of Chief Financial Officer Pursuant to Rule 13a-14(a)/15d-14(a) as Adopted Pursuant to Section 302 of Sarbanes- Oxley Act of 2002 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 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 101.INS* XBRL Instance Document 101.SCH* XBRL Taxonomy Extension Schema Document 101.CAL* XBRL Taxonomy Calculation Linkbase Document 101.LAB* XBRL Taxonomy Label Linkbase Document 101.PRE* XBRL Presentation Linkbase Document 101.DEF* XBRL Taxonomy Extension Definition Linkbase Document 104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) Filed herewith * † Denotes management contract or compensatory plan or arrangement ITEM 16. FORM 10-K SUMMARY None. 37 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. SIGNATURES Date: March 21, 2022 ZYNEX, INC. By : /s/ Thomas Sandgaard Thomas Sandgaard Chairman, President Chief Executive Officer and Principal Executive Officer Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. Date Name and Title Signature March 21, 2022 March 21, 2022 March 21, 2022 March 21, 2022 March 21, 2022 Thomas Sandgaard, Chairman, President, Chief Executive Officer and Principal Executive Officer /s/ Thomas Sandgaard Daniel Moorhead Chief Financial Officer and Principal Financial Officer Barry D. Michaels Director Michael Cress Director Joshua R. Disbrow Director 38 /s/ Daniel Moorhead /s/ Barry D. Michaels /s/ Michael Cress /s/ Joshua R. Disbrow Table of Contents Report of Independent Registered Public Accounting Firm To the Stockholders and Board of Directors of Zynex, Inc. Opinion on the Financial Statements We have audited the accompanying consolidated balance sheets of Zynex, Inc. (the “Company”) as of December 31, 2021 and 2020, the related consolidated statements of income, stockholders' equity, and cash flows for each of the years in the two-year period ended December 31, 2021, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the years in the two-year period ended December 31, 2021, in conformity with accounting principles generally accepted in the United States of America. Basis for Opinion The Company's management is responsible for these financial statements. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion. Critical Audit Matters The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing a separate opinion on the critical audit matters or on the accounts or disclosures to which they relate. Estimation of Transaction Price and Variable Consideration for Revenue Recognition including related Valuation of Accounts Receivable – Refer to Note 2 to the Financial Statements Critical Audit Matter Description As described in Note 2 to the financial statements, revenue is derived from sales and leases of electrotherapy devices and sales of related supplies and complementary products. The Company recognizes revenue when control of the product has been transferred to the patient, in the amount that reflects the consideration the Company expects to receive. The Company estimates revenues using the portfolio approach based upon historical rates of collection, aging of receivables, product mix, trends in historical reimbursement rates by third-party payer types, and current relationships and experience with the third-party payers, which includes estimated variable consideration and relevant constraints for third-party payer refund requests, deductions and adjustments. F-1 Table of Contents We identified the Company's estimation of transaction price related to variable consideration for revenue recognition including the related valuation of accounts receivable as a critical audit matter. Auditing the Company's determination of variable consideration and the related constraint for revenue recognition including the recorded value for accounts receivable was challenging and complex due to the high degree of subjectivity involved in evaluating management’s estimates. This required a high degree of auditor judgment and increased extent of effort to audit and evaluate management’s key judgments. How the Critical Audit Matter Was Addressed in the Audit Our audit procedures related to revenue recognition and accounts receivable include the following, among others: ● We gained an understanding of the design of the controls over the Company's contracts with customers including those controls over the processes to develop key management estimates. ● We performed testing throughout the year on a sample of contracts to test the validity of sales transactions and cash receipts application. ● We also performed testing throughout the year on a quarterly basis over subsequent collections on recorded receivables. ● We evaluated the significant assumptions and the accuracy and completeness of the underlying data used in management’s calculations, including evaluating management’s estimate of historical reimbursement experience as well as expected future payment behavior through a combination of underlying data validation by inspection of source documents, independent recalculation of management’s analysis, review of correspondence with third-party payers, inquiries with management and evaluation of trends in collection rates and refund requests. ● We performed independent sensitivity analyses over the Company's significant assumptions embodied within their key estimates including evaluation of subsequent payment activity compared with management’s estimate of expected collection rates. Business Combination – Refer to Note 3 to the Financial Statements Critical Audit Matter Description As described in Note 3 to the financial statements, the Company acquired Kestrel Labs, Inc. (“Kestrel”) on December 22, 2021 for consideration of $30.5 million, including cash, stock and contingent consideration. The acquisition of Kestrel was accounted for under the acquisition method of accounting for business combinations. As such, assets acquired and liabilities assumed were recorded at their estimated fair values, including intangible assets of $10 million and contingent consideration of $9.7 million, as of the acquisition date. The contingent consideration consisted of potential payments in common stock of the Company for achieving FDA submission and approval and is remeasured to fair value each reporting period. The determination of fair value of identified intangible assets and contingent consideration required management to make significant estimates and assumptions and engage a valuation firm to assist with estimating the fair value of the intangible asset and contingent consideration liability. We identified the valuation of the intangible asset and contingent consideration liability as a critical audit matter. Auditing the Company’s accounting for the acquisition of Kestrel was challenging and complex due to the degree of subjectivity involved in evaluating the estimation uncertainty and key assumptions involved in determining the fair value of acquisition-related contingent consideration and intangible assets. Auditing the key assumptions in management’s estimates required a high degree of auditor judgment and increased effort. How the Critical Audit Matter Was Addressed in the Audit Our audit procedures related to the assumptions impacting the fair value calculation of the acquisition-related contingent consideration and intangible asset included the following, among others: Related to valuation of the acquisition-related contingent consideration liability: ● We gained an understanding of the design of the controls over the Company's accounting for the acquisition including controls over the process to develop estimates for the contingent consideration. F-2 Table of Contents ● We inquired of management to understand each milestone and key assumptions, including current progress and any results received to date and stock price volatility. ● We evaluated the reasonableness of the key assumptions by comparing them (1) internal communications to management and the Board of Directors, (2) information included in the Company’s external communications, and (3) regulatory trends to consider the impact of changes in the regulatory environment on the key assumptions. ● We independently corroborated the reasonableness of the key assumptions by verifying the process and timing necessary to achieve each milestone. ● With the assistance of our fair value specialists, we evaluated the reasonableness of the significant valuation assumptions and calculations by o Evaluating the appropriateness of the method used for estimating fair value, o Evaluating the reasonableness of the valuation assumptions utilized, including the discount rate, and o Testing the completeness and mathematical accuracy of the model used to determine the estimated fair value of the contingent consideration. Related to the valuation of intangible asset: ● We gained an understanding of the design of the controls over the Company's accounting for the acquisition including controls over the process to develop estimates for the intangible asset. ● We inquired of management and the Company’s personnel to understand the key assumptions, including revenue growth rates, projected margins, and the royalty rate. ● We evaluated whether the assumptions used were reasonable by considering industry data and current market forecasts, and whether such assumptions were consistent with evidence obtained in other areas of the audit. ● With the assistance of our fair value specialists, we evaluated the reasonableness of the significant valuation assumptions and calculations by o Evaluating the appropriateness of the method used for estimating fair value, o Evaluating the reasonableness of the valuation assumptions utilized, including the discount rate, and o Testing the completeness and mathematical accuracy of the calculation used to determine the estimated fair value of the intangible asset. /s/ Plante & Moran, PLLC We have served as the Company’s auditor since 2016. Denver, Colorado March 21, 2022 F-3 ZYNEX, INC. CONSOLIDATED BALANCE SHEETS (AMOUNTS IN THOUSANDS, EXCEPT SHARE DATA) ASSETS December 31, 2021 December 31, 2020 Table of Contents Current assets: Cash Accounts receivable, net Inventory, net Prepaid expenses and other Total current assets Property and equipment, net Operating lease asset Finance lease asset Deposits Intangible assets, net of accumulated amortization Goodwill Deferred income taxes Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accounts payable and accrued expenses Cash dividends payable Operating lease liability Finance lease liability Income taxes payable Current portion of debt Accrued payroll and related taxes Long-term liabilities: Long-term portion of debt, less issuance costs Contingent consideration Operating lease liability Finance lease liability Total current liabilities Total liabilities Commitments and contingencies Stockholders' equity: Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued and outstanding as of December 31, 2021 and December 31, 2020 Common stock, $0.001 par value; 100,000,000 shares authorized; 41,400,834 issued and 39,737,890 outstanding as of December 31, 2021 (including 3,606,970 shares declared as a stock dividend on November 9, 2021 and issued on January 21, 2022) 39,739,368 issued and 38,244,310 outstanding as of December 31, 2020 (including 3,452,379 shares declared as a stock dividend on November 9, 2021 and issued on January 21, 2022) Additional paid-in capital Treasury stock of 1,246,399 and 1,071,220 shares, at December 31, 2021 and 2020, respectively, at cost Retained earnings Total stockholders' equity Total liabilities and stockholders' equity See accompanying notes to consolidated financial statements. F-4 $ $ $ $ $ 42,612 28,632 10,756 689 82,689 2,186 16,338 389 585 9,975 20,401 711 133,274 4,739 3,629 2,859 118 2,296 5,333 3,897 22,871 10,605 9,700 15,856 317 59,349 39,173 13,837 8,635 1,378 63,023 1,925 5,993 321 347 — — 566 72,175 4,709 8 2,051 77 280 — 2,992 10,117 — — 4,920 283 15,320 — — 41 80,397 (6,513) — 73,925 133,274 $ 36 37,235 (3,846) 23,430 56,855 72,175 Table of Contents NET REVENUE Devices Supplies Total net revenue ZYNEX, INC. CONSOLIDATED STATEMENTS OF INCOME (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE DATA) YEARS ENDED DECEMBER 31, 2021 AND 2020 COSTS OF REVENUE AND OPERATING EXPENSES Costs of revenue - devices and supplies Sales and marketing General and administrative Total costs of revenue and operating expenses Income from operations Other income/(expense) Loss on disposal of non-controlling interest Interest expense Other income/(expense), net Income from operations before income taxes Income tax expense Net Income Net income per share: Basic Diluted Weighted average basic shares outstanding Weighted average diluted shares outstanding For the Years Ended December 31, 2021 2020 $ $ $ $ $ 36,613 93,688 130,301 27,321 54,290 26,324 107,935 22,366 — (95) (95) 22,271 5,168 17,103 0.45 0.44 38,317 39,197 $ $ $ 21,269 58,853 80,122 17,417 34,133 18,323 69,873 10,249 (77) (19) (96) 10,153 1,079 9,074 0.24 0.24 37,256 38,438 See accompanying notes to consolidated financial statements. F-5 Table of Contents ZYNEX, INC. CONSOLIDATED STATEMENTS OF CASH FLOWS (AMOUNTS IN THOUSANDS) YEARS ENDED DECEMBER 31, 2021 AND 2020 CASH FLOWS FROM OPERATING ACTIVITIES: Net income Adjustments to reconcile net income to net cash provided by operating activities: Depreciation Amortization Non-cash reserve charges Stock-based compensation Non-cash lease expense Benefit for deferred income taxes Change in operating assets and liabilities, net of the effects of acquisitions: Accounts receivable Prepaid and other assets Accounts payable and other accrued expenses Inventory Deposits Other Net cash provided by operating activities CASH FLOWS FROM INVESTING ACTIVITIES: Purchase of property and equipment Business acquisition, net of cash acquired Net cash used in investing activities CASH FLOWS FROM FINANCING ACTIVITIES: Payments on finance lease obligations Cash dividends paid Purchase of treasury stock Debt issuance costs Proceeds from issuance of common stock under equity offering, net Proceeds from the issuance of common stock on stock-based awards Proceeds from debt Taxes withheld and paid on employees' equity awards Net cash provided by financing activities Net increase in cash Cash at beginning of period Cash at end of period Supplemental disclosure of cash flow information: Cash paid for interest Cash paid for rent Cash paid for income taxes Supplemental disclosure of non-cash investing and financing activities: Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-use assets obtained in exchange for new finance lease liabilities Inventory transferred to property and equipment under lease Capital expenditures not yet paid Accrual for cash dividend payable Contingent consideration related to acquisition Stock issued for acquisition Stock dividend See accompanying notes to consolidated financial statements. F-6 For the Years Ended December 31, 2021 2020 $ 17,103 $ 2,261 25 (107) 1,630 1,398 (146) (14,781) 690 2,889 (3,776) (237) — 6,949 (609) (15,997) (16,606) (98) (1) (2,667) (16) — 161 15,953 (236) 13,096 3,439 39,173 42,612 (82) (2,109) (3,305) 13,240 175 1,587 47 3,622 9,700 (4,701) (36,911) $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 9,074 1,572 — (238) 2,681 2 (54) (8,004) (724) 3,773 (7,323) (18) 77 818 (985) — (985) (57) — — — 25,203 566 — (412) 25,300 25,133 14,040 39,173 (19) (1,633) (894) 3,834 225 811 — — — — — Table of Contents ZYNEX, INC. CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (DEFICIT) YEARS ENDED DECEMBER 31, 2021 AND 2020 (AMOUNTS IN THOUSANDS, EXCEPT SHARE DATA) Balance at December 31, 2019 Stock issued for public offering, net of issuance cost Exercised and vested stock-based awards Stock-based compensation expense Shares of common stock withheld to pay taxes on employees' equity awards Deconsolidation of non-controlling interest Net income Balance at December 31, 2020 Exercised and vested stock-based awards Warrants exercised Stock-based compensation expense Shares of common stock withheld to pay taxes on employees' equity awards Purchase of treasury stock Stock issued for acquisition Escrow shares issued for acquisition Cash dividends declared ($0.10 per share) Stock dividends declared Net income Balance at December 31, 2021 Non- Controlling Interest $ $ $ $ Common Stock Treasury Retained — — — — — — Additional Paid-in Shares Amount Capital $ 9,198 34 25,202 1 1 566 2,681 — (412) — — — — — $ 37,235 36 160 1 — — 1,630 — — (236) — — — — 4 — 41 36,041,371 1,375,000 854,406 — (26,467) — — 38,244,310 234,388 11,000 — (44,414) (175,179) 489,262 978,523 — — — 39,737,890 4,701 — — 36,907 — $ 80,397 Stock Earnings $(3,846) $ 14,356 — — — — — 9,074 $(3,846) $ 23,430 — — — — — — — — — — (2,667) — — — — — (3,622) — (36,911) — 17,103 $(6,513) $ $ — $ Total Stockholders Equity 19,653 25,203 567 2,681 (412) 89 9,074 56,855 161 — 1,630 (236) (2,667) 4,701 — (3,622) — 17,103 73,925 (89) $ — — — — 89 — — $ — — — — — — — — — — — $ See accompanying notes to consolidated financial statements. F-7 Table of Contents ZYNEX, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS YEARS ENDED DECEMBER 31, 2021 AND 2020 (1) ORGANIZATION, NATURE OF BUSINESS Organization Zynex, Inc. (a Nevada corporation) has its headquarters in Englewood, Colorado. The term “the Company” refers to Zynex, Inc. and its active and inactive subsidiaries. The Company operates in one primary business segment, medical devices which include electrotherapy and pain management products. As of December 31, 2021, the Company’s only active subsidiaries are Zynex Medical, Inc. (“ZMI,” a wholly-owned Colorado corporation) through which the Company conducts most of its operations, and Zynex Monitoring Solutions, Inc. (“ZMS,” a wholly- owned Colorado corporation). ZMS has developed a fluid monitoring system which received approval by the U.S. Food and Drug Administration (“FDA”) during 2020 and is still awaiting CE Marking in Europe. ZMS has achieved no revenues to date. The Company’s inactive subsidiaries include Zynex Europe, Zynex NeuroDiagnostics, Inc. (“ZND,” a wholly-owned Colorado corporation) and Pharmazy, Inc. (“Pharmazy”, a wholly-owned Colorado Corporation), which was incorporated in June 2015. The Company’s compounding pharmacy operated as a division of ZMI dba as Pharmazy through January 2016. In December 2021, the Company acquired 100% of Kestrel Labs, Inc. (“Kestrel”), a laser-based, noninvasive patient monitoring technology company. Kestrel’s' laser-based products include the NiCO™ CO-Oximeter, a multi-parameter pulse oximeter, and HemeOx™, a total hemoglobin oximeter that enables continuous arterial blood monitoring. Both NiCO and HemeOx are yet to be presented to the U.S. Food and Drug Administration (“FDA”) for market clearance. All activities related to Kestrel flow through our ZMS subsidiary. Nature of Business The Company designs, manufactures and markets medical devices that treat chronic and acute pain, as well as activate and exercise muscles for rehabilitative purposes with electrical stimulation. The Company’s devices are intended for pain management to reduce reliance on drugs and medications and provide rehabilitation and increased mobility through the utilization of non-invasive muscle stimulation, electromyography technology, interferential current (“IFC”), neuromuscular electrical stimulation (“NMES”) and transcutaneous electrical nerve stimulation (“TENS”). All of our medical devices are designed to be patient friendly and designed for home use. Our devices are small, portable, battery operated and include an electrical pulse generator which is connected to the body via electrodes. All of our medical devices are marketed in the U.S. and are subject to FDA regulation and approval. Our products require a physician’s prescription before they can be dispensed in the U.S. Our primary product is the NexWave device. The NexWave is marketed to physicians and therapists by our field sales representatives. The NexWave requires consumable supplies, such as electrodes and batteries, which are shipped to patients on a recurring monthly basis, as needed. During the years ended December 31, 2021, and 2020, the Company generated all of its revenue in North America from sales and supplies of its devices to patients and health care providers. The Company declared a 10% stock dividend on November 9, 2021, which was effective on January 21, 2022. Except as otherwise indicated, all related amounts reported in the consolidated financial statements, including common share quantities, earnings per share amounts and exercise prices of options, have been retroactively adjusted for the effect of this stock dividend. (2) SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation The accompanying consolidated financial statements include the accounts of Zynex, Inc. and its subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. F-8 Table of Contents Non-controlling Interest Non-controlling interest in the equity of a subsidiary is accounted for and reported as a decrease in shareholders’ equity. Prior years’ non- controlling interest represents the 20% ownership in the Company’s majority-owned inactive subsidiary, Zynex Billing, Corp (ZBC). During 2020, the Company dissolved ZBC due to inactivity and has no plans to restart operations. As a result, the Company recorded a loss of $77,000 on the dissolution related to the 20% non-controlling interest, less liabilities that were written off. Use of Estimates Preparation of financial statements in conformity with generally accepted accounting principles in the United States of America (“GAAP”), requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The most significant management estimates used in the preparation of the accompanying consolidated financial statements are associated with the expected net collectable value of its accounts receivable and related revenue, inventory reserves, the life of its leased unit devices, stock-based compensation, and valuation of long-lived assets acquired in business combinations and realizability of deferred tax assets. Fair Value of Financial Instruments The Company’s financial instruments include cash, accounts receivable, accounts payable and accrued liabilities. The carrying amounts of financial instruments, including cash, accounts receivable, accounts payable and accrued liabilities approximate their fair value due to their short maturities. The Company measures its long-term debt at fair value which approximates book value as the long-term debt bears market rates of interest. The Company classifies contingent consideration liabilities related to business acquisitions within Level 3 as factors used to develop the estimated fair value are unobservable inputs that are not supported by market activity. The Company estimates the fair value of contingent consideration liabilities using a Monte Carlo simulation. Changes in the fair value of contingent liabilities in subsequent periods are recorded as a loss (gain) in the statements of operations. Cash The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. Short-term investments include investments with maturities greater than three months, but not exceeding 12 months, or highly liquid investments with maturities greater than 12 months that the Company intends to liquidate during the next 12 months for working capital needs. Accounts Receivable, Net The Company’s accounts receivables represent unconditional rights to consideration and are generated when a patient receives one of the Company’s devices, related supplies or complementary products. In conjunction with fulfilling the Company’s obligation to deliver a product, the Company bills the patient’s third-party payer or the patient. Billing adjustments represent the difference between the list prices and the reimbursement rates set by third-party payers, including Medicare, commercial payers and amounts billed directly to the patient. Specific amounts, if uncollected over a period of time, may be written off after several appeals, which in some cases may take longer than twelve months. Primarily all of the Company’s receivables are due from patients with commercial or government health plans and workers compensation claims with a small portion related to private pay individuals, attorney and auto claims. F-9 Table of Contents Inventory, Net Inventories are stated at the lower of cost or net realizable value. Cost is computed using standard costs, which approximates actual costs on an average cost basis. Following are the components of inventory as of December 31, 2021 and 2020: Raw materials Work-in-process Finished goods Inventory in transit Less: reserve $ $ December 31, 2021 December 31, 2020 3,213 1,455 4,119 — 8,787 (152) 8,635 4,471 345 4,468 1,624 10,908 (152) 10,756 $ $ $ $ The Company monitors inventory for turnover and obsolescence and records losses for excess and obsolete inventory, as appropriate. The Company provides reserves for estimated excess and obsolete inventories equal to the difference between the costs of inventories on hand and the estimated market value based upon assumptions about future demand. If future demand is less favorable than currently projected by management, additional inventory write-downs may be required. Property and Equipment Property and equipment is recorded at cost. Repairs and maintenance expenditures are charged to expense as incurred. We compute depreciation expense on a straight-line basis over the estimated useful lives of the assets as follows: Classification Office furniture and equipment Assembly equipment Vehicles Leasehold improvements Leased devices Leases Estimated Useful Life 5 to 7 years 7 years 5 years Shorter of useful life or term of lease 9 months The Company determines if an arrangement is a lease at inception or modification of a contract. The Company recognizes finance and operating lease right-of-use assets and liabilities at the lease commencement date based on the estimated present value of the remaining lease payments over the lease term. For our finance leases, the Company uses the implicit rate to determine the present value of future lease payments. For our operating leases that do not provide an implicit rate, the Company uses incremental borrowing rates to determine the present value of future lease payments. The Company includes options to extend or terminate a lease in the lease term when it is reasonably certain to exercise such options. The Company recognizes leases with an initial term of 12 months or less as lease expense over the lease term and those leases are not recorded on our Consolidated Balance Sheets. For additional information on our leases where the Company is the lessee, see Note 11- Leases. A significant portion of our device revenue is derived from patients who obtain our devices under month-to-month lease arrangements where the Company is the lessor. Revenue related to devices on lease is recognized in accordance with Accounting Standards Codification (“ASC”) 842, Leases. Using the guidance in ASC 842, we concluded our transactions should be accounted for as operating leases based on the following criteria: ● The lease does not transfer ownership of the underlying asset to the lessee by the end of the lease term. ● The lease does not grant the lessee an option to purchase the underlying asset that the lessee is reasonably certain to exercise. F-10 Table of Contents ● The lease term is month to month, which does not meet the major part of the remaining economic life of the underlying asset. However, if the commencement date falls at or near the end of the economic life of the underlying asset, this criterion shall not be used for purposes of classifying the lease. ● There is no residual value guaranteed and the present value of the sum of the lease payments does not equal or exceed substantially all of the fair value of the underlying asset ● The underlying asset is expected to have alternative uses to the lessor at the end of the lease term. Lease commencement occurs upon delivery of the device to the patient. The Company retains title to the leased device and those devices are classified as property and equipment on the balance sheet. Since our leases are month-to-month and can be returned by the patient at any time, revenue is recognized monthly for the duration of the period in which the patient retains the device. Intangible Assets and Goodwill The Company records intangible assets based on estimated fair value on the date of acquisition. The finite-lived intangible assets are amortized on a straight-line basis over the estimated lives of the assets. The indefinite-lived intangible assets are not subject to amortization but are subject to impairment testing in the future. Goodwill is recorded as the difference between the fair value of the purchase consideration and the estimated fair value of the net identifiable tangible and intangible assets acquired. Useful lives of finite-lived intangible assets by each asset category are summarized below: Patents Revenue Recognition Estimated Useful Lives in years 11 Revenue is derived from sales and leases of our electrotherapy devices and sales of related supplies and complementary products. The Company recognizes revenue when control of the product has been transferred to the patient, in the amount that reflects the consideration the Company expects to receive. In general, revenue from sales of our devices and supplies is recognized once the product is delivered to the patient, which is when control is deemed to have transferred to our patient. Sales of our devices and supplies are primarily shipped directly to the patient, with a small amount of revenue generated from sales to distributors. In the healthcare industry there is often a third party involved that will pay on the patients’ behalf for purchased or leased devices and supplies. The terms of the separate arrangement impact certain aspects of the contracts, with patients covered by third-party payers, such as contract type, performance obligations and transaction price, but for purposes of revenue recognition the contract with the customer refers to the arrangement between the Company and the patient. The Company does not have any material deferred revenue in the normal course of business as each performance obligation is met upon delivery of goods to the patient. There are no substantial costs incurred through support or warranty obligations. The following table provides a breakdown of net revenue related to devices accounted for as purchases subject to ASC 606 and leases subject to ASC 842 (in thousands): Device revenue Purchased Leased Total device revenue For the Years Ended December 31, 2021 2020 $ $ 9,240 27,373 36,613 $ $ 6,390 14,879 21,269 F-11 Table of Contents Revenues are estimated using the portfolio approach by third-party payer type based upon historical rates of collection, aging of receivables, trends in historical reimbursement rates by third-party payer types, and current relationships and experience with the third-party payers, which includes estimated constraints for third-party payer refund requests, deductions and adjustments. Inherent in these estimates is the risk that they will have to be revised as additional information becomes available and constraints are released. Specifically, the complexity of third-party payer billing arrangements and the uncertainty of reimbursement amounts for certain products from third-party payers or unanticipated requirements to refund payments previously received may result in adjustments to amounts originally recorded. Settlements with third-party payers for retroactive revenue adjustments due to audits, reviews or investigations are considered variable consideration and are included in the determination of the estimated transaction price using the expected amount method. These adjustments to transaction price are estimated based on the terms of the payment agreement with the payer, correspondence from the payer and historical settlement activity, including an assessment to ensure that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the retroactive adjustment is subsequently resolved. Due to continuing changes in the health care industry and third-party payer reimbursement, it is possible our forecasting model to estimate collections could change, which could have an impact on our results of operations and cash flows. Any differences between estimated and actual collectability are reflected in the period in which received. Historically these differences have been immaterial, and the Company has not had a significant reversal of revenue from prior periods. A change in the way estimates are determined can result from a number of factors, including changes in the reimbursement policies or practices of third-party payers, or changes in industry rates of reimbursement. The Company monitors the variability and uncertain timing over third-party payer types in our portfolios. If there is a change in our third-party payer mix over time, it could affect our net revenue and related receivables. We believe we have a sufficient history of collection experience to estimate the net collectible amounts by third-party payer type. However, changes to constraints for billing adjustments and refund requests have historically fluctuated and may continue to fluctuate significantly from quarter to quarter and year to year. Impairment of Long-lived Assets The Company assesses impairment of long-lived assets when events or changes in circumstances indicates that their carrying value amount may not be recoverable. Long-lived assets consist of property and equipment, net and intangible assets. Circumstances which could trigger a review include, but are not limited to: (i) significant decreases in the market price of the asset; (ii) significant adverse changes in the business climate or legal or regulatory factors; (iii) or, expectations that the asset will more likely than not be sold or disposed of significantly before the end of its estimated useful life. If the estimated future undiscounted cash flows, excluding interest charges, from the use of an asset are less than the carrying value, a write-down would be recorded to reduce the related asset to its estimated fair value. Impairment of Goodwill The Company tests goodwill at least annually for impairment. The Company tests more frequently if indicators are present or changes in circumstances suggest that impairment may exist. These indicators include, among others, declines in sales, earnings or cash flows, or the development of a material adverse change in the business climate. The Company assesses goodwill for impairment at the reporting unit level. The estimates of fair value and the determination of reporting units requires management judgment. Debt Issuance Costs Debt issuance costs are costs incurred to obtain new debt financing. Debt issuance costs are presented in the accompanying consolidated balance sheets as a reduction in the carrying value of the debt and are accreted to interest expense using the effective interest method. Stock-based Compensation The Company accounts for stock-based compensation through recognition of the cost of employee services received in exchange for an award of equity instruments, which is measured based on the grant date fair value of the award that is ultimately expected to vest during the period. The stock-based compensation expenses are recognized over the period during which an employee is required to provide service in exchange for the award (the requisite service period, which in the Company’s case is the same as the vesting F-12 Table of Contents period). For awards subject to the achievement of performance metrics, stock-based compensation expense is recognized when it becomes probable that the performance conditions will be achieved. Earnings Per Share We calculate basic earnings per share on the basis of the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is calculated using the weighted-average number of shares of common stock outstanding for the period plus the effect of potential dilutive common shares during the period using the treasury stock method. Potential shares of common stock outstanding include unvested restricted stock awards, shares held in escrow, vested and unvested unexercised stock options and common stock purchase warrants. Research and Development Research and development costs are expensed when incurred. Research and development expense for the years ended December 31, 2021 and 2020 was approximately $2.6 million and $0.8 million, respectively. Research and development, which includes salaries related to research and development and raw materials, are included in general and administrative expenses on the consolidated statement of comprehensive income. Income Taxes We record deferred tax assets and liabilities for the estimated future tax effects of temporary differences between the tax bases of assets and liabilities and amounts reported in the accompanying consolidated balance sheets, as well as any operating loss and tax credit carry-forwards. We measure deferred tax assets and liabilities using enacted tax rates expected to be applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. We reduce deferred tax assets by a valuation allowance if, based on available evidence, it is more likely than not that these benefits will not be realized. We recognize tax benefits from uncertain tax positions if it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. Recently Issued Accounting Pronouncements In June 2016, FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) ("ASU 2016-13"), Measurement of Credit Losses on Financial Instruments. The standard significantly changes how entities will measure credit losses for most financial assets and certain other instruments that aren't measured at fair value through net income. The standard will replace today's "incurred loss" approach with an "expected loss" model for instruments measured at amortized cost. For available-for-sale debt securities, entities will be required to record allowances rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. This ASU is effective for annual periods beginning after December 15, 2022, and interim periods therein for smaller reporting companies. Early adoption is permitted for annual periods beginning after December 15, 2018, and interim periods therein. The Corporation is currently evaluating the impact that the adoption of ASU 2016-13 will have on our financial condition, results of operations and cash flows. Management has evaluated other recently issued accounting pronouncements and does not believe that this pronouncement will have a material impact on the Company’s consolidated financial statements. (3) BUSINESS COMBINATIONS On December 22, 2021, the Company and its wholly-owned subsidiary Zynex Monitoring Solutions, Inc., entered into a Stock Purchase Agreement (the “Agreement”) with Kestrel Labs, Inc. (“Kestrel”) and each of the shareholders of Kestrel (collectively, the "Selling Shareholders"). Under the Agreement, the Selling Shareholders agreed to sell all of the outstanding common stock of Kestrel (the “Kestrel Shares”) to ZMS. The consideration for the Kestrel Shares consisted of $16.1 million cash and 1,334,350 shares of the Company’s common stock (the “Zynex Shares”). All of the Zynex Shares are subject to a lockup agreement for a period of one year from the closing date under the Agreement (the “Closing Date”). The Agreement provides the Selling Shareholders with piggyback registration rights. 889,566 of the Zynex Shares are being deposited in escrow (the “Escrow Shares”). The number of Escrow Shares is subject to adjustment on the one-year anniversary of the Closing Date (or in connection with any Liquidation Event (as defined in the F-13 Table of Contents Agreement) that occurs prior to such anniversary date) based on the number of shares equal to $10,000,000 divided by a 30-day volume weighted average closing price of the Zynex common stock. Half of the Escrow Shares will be released on submission of a dossier on a laser-based photoplethysmographic device (the “Device”) to the Food and Drug Administration (the “FDA”) for permission to market and sell the Device in the United States. The other half of the Escrow Shares will be released upon notification from the FDA finding the Device can be marketed and sold in the United States. The amount of escrow shares were recalculated at December 31, 2021, and are included in the calculation of diluted earnings per share. The maximum amount of Zynex shares that may be released are limited to 19.9% of the total number of common shares and total voting power of common shares. The acquisition of Kestrel has been accounted for as a business combination under ASC 805. Under ASC 805, assets acquired, and liabilities assumed in a business combination must be recorded at their fair values as of the acquisition date. F-14 Table of Contents Summary of Purchase Consideration Presented below is a summary of the total purchase consideration for the Kestrel business combinations (in thousands except share data): Closing date cash Working capital distribution Total cash paid Closing date equity Issued shares Escrow shares Total equity Total consideration Shares(1) Fair Value Cash — $ — — $ — $ 16,000 — 78 — $ 16,078 Total $ 16,000 78 $ 16,078 444,784 889,566 1,334,350 1,334,350 4,701 9,700 $ 14,401 $ 14,401 4,701 — — 9,700 — $ 14,401 $ 30,479 $ $ 16,078 (1) The amount of shares issued and included in escrow were not retroactively adjusted for the 10% stock dividend declared on November 9, 2021 and issued on January 21, 2022. Purchase Price Allocations Presented below is a summary of the purchase price allocations for the Kestrel business combinations on the acquisition date (in thousands): Current assets: Cash Accounts receivable Prepaid expenses and other Total current assets Long-term assets: Identifiable intangible assets Total assets acquired Less liabilities assumed: Accounts payable Net identifiable assets acquired Goodwill Net assets acquired Purchase Price Allocation 80 15 1 96 10,000 10,096 (18) 10,078 20,401 30,479 $ $ $ $ The fair value of the identifiable intangibles assets is primarily related to patents which will be amortized over a useful life of 11 years. The excess of the purchase price over the fair value of the net assets acquired was recorded as goodwill. The goodwill is attributable to the benefits the Company expects to realize by enhancing its product offering and addressable markets, thereby contributing to an expanded revenue base. F-15 Table of Contents Pro forma Information The unaudited pro forma information for the year ended December 31, 2021 and 2020 was calculated after applying impact of acquisition date fair value adjustments. The pro forma financial information presents the combined results of operations of Zynex and Kestrel as if the acquisition had occurred on January 1, 2020 after giving effect to certain pro forma adjustments. The pro forma adjustments reflected in the table below include only those adjustments that are factually supportable and directly attributable to the acquisition (in thousands): Revenue Net income Year Ended December 31, (unaudited) 2021 2020 $ 130,811 $ 80,414 7,568 $ 16,404 $ These pro forma adjustments include: (i) a net increase in amortization expense to record amortization expense for the aforementioned acquired identifiable intangible assets, (ii) a net increase in interest expense as a result of related to borrowings that were put into place as part of the acquisition, (iii) an adjustment to record the acquisition-related transaction costs of $0.3 million in the period required, and (iv) the tax effect of the pro forma adjustments using the anticipated effective tax rate. The effective tax rate of the combined company could be materially different from the rate presented in this unaudited pro forma combined financial information. As further information becomes available, any such adjustment described above could be material to the amounts presented in the unaudited pro forma combined financial statements. The pro forma information does not purport to be indicative of the results of operations that would have resulted had the combination occurred at the beginning of each period presented, or of future results of the consolidated entities. (4) PROPERTY AND EQUIPMENT The components of property and equipment are as follows (in thousands): Property and equipment Office furniture and equipment Assembly equipment Vehicles Leasehold improvements Sales rep demo units Leased devices Less accumulated depreciation December 31, 2021 December 31, 2020 $ $ $ 2,391 100 203 1,054 — 1,080 4,828 (2,642) 2,186 $ $ $ 2,362 143 198 559 361 809 4,432 (2,507) 1,925 The Company monitors devices out on lease for potential loss and places an estimated reserve on the net book value based on an analysis of the number of units of which are still with patients for which the Company cannot determine the current status. Total depreciation expense related to our purchased property and equipment was $0.9 million and $0.7 million for the years ended December 31, 2021 and 2020, respectively. Total depreciation expense related to devices out on lease was $1.4 million and $0.8 million for the years ended December 31, 2021 and 2020, respectively. Depreciation on leased units is reflected on the income statement as cost of revenue. During the year ended December 31, 2021, the Company began expensing product demo units sent to its territory managers to use in the field. F-16 Table of Contents (5) GOODWILL AND OTHER INTANGIBLES During the year ended December 31, the Company completed the acquisition of Kestrel, which resulted in goodwill of $20.4 million (see Note 3). As of December 31, 2021, there was no impairment indicators of the Company’s net asset value. The following table provides the summary of the Company’s intangible assets as of December 31, 2021. Acquired patents $ 10,000 $ (25) $ 9,975 11.0 The following table summarizes the estimated future amortization expense to be recognized over the next years and periods thereafter: Gross Carrying Amount Accumulated Amortization Net Carrying Amount Weighted- Average Remaining Life (in years) 2022 2023 2024 2025 2026 Thereafter Total future amortization expense (6) EARNINGS PER SHARE December 31, (In thousands) 908 908 911 908 908 5,432 9,975 $ $ The calculation of basic and diluted earnings per share for the years ended December 31, 2021 and 2020 are as follows (in thousands, except per share data): Basic earnings per share Net income available to common stockholders Basic weighted-average shares outstanding Basic earnings per share Diluted earnings per share Net income available to common stockholders Weighted-average shares outstanding Effect of dilutive securities - options and restricted stock Diluted weighted-average shares outstanding Diluted earnings per share F-17 For the Years Ended December 31, 2021 2020 $ $ $ $ $ $ $ 17,103 38,317 0.45 17,103 38,317 880 39,197 9,074 37,256 0.24 9,074 37,256 1,182 38,438 0.44 $ 0.24 Table of Contents For the years ended December 31, 2021 and 2020, 0.4 million and 0.2 million shares of common stock were excluded from the dilutive stock calculation because their effect would have been anti-dilutive. The basic and diluted weighted-average shares outstanding for both periods presented have been updated to include the retroactive impact of the 10% common stock dividend declared on November 11, 2021. (7) NOTES PAYABLE The Company entered into a loan agreement (the “Loan Agreement”) with Bank of America, N.A. (the “Bank”). Under this Loan Agreement, the Bank is extending two facilities to the Borrowers. Specified assets have been pledged as collateral. One facility is a line of credit in the amount of $4.0 million available until December 1, 2024 (“Facility 1”). The Borrower will pay interest on Facility 1 on the first day of each month beginning January 1, 2022. The interest rate is an annual rate equal to the sum of (i) the greater of the BSBY Daily Floating Rate or (ii) the Index Floor (as defined in the Loan Agreement), plus 2.00%. As of December 31, 2021, we had not utilized this facility. The other facility being extended by the Bank to the Borrower is a fixed rate term loan in the amount of up to $16.0 million (“Facility 2”). Facility 2 is available in one disbursement from the Bank and the interest rate is equal to 2.8% per year. The Borrower must pay interest on the first day of each month beginning January 1, 2022 and the Borrower will also repay the principal amount in equal installments of $444,444 per month through December 1, 2024. Facility 2 was entered into in conjunction with the purchase of Kestrel Labs. The following table summarizes future principal payments on long-term debt as of December 31, 2021: 2022 2023 2024 Future principal payments Less current portion Less debt issuance costs Long-term debt, net of debt issuance costs (8) STOCK-BASED COMPENSATION PLANS Zynex, Inc. 2017 Stock Incentive Plan December 31, (In thousands) 5,333 5,333 5,334 16,000 (5,333) (62) 10,605 $ $ The Company currently has one active long-term incentive plan. The Company’s 2017 Stock Incentive Plan (the “2017 Stock Plan”) is the Company’s equity compensation plan and provides for grants of stock-based awards to employees, directors and other individuals providing services to the Company. Awards issued under the 2017 Stock Plan are at the discretion of the Board of Directors. The 2017 Stock Plan mandates a maximum award term of 10 years and stipulates that stock options be granted with prices not less than fair market value on the date of grant. Stock option awards generally vest over four years. Restricted stock awards typically vest quarterly over three years for grants issued to members of our Board of Directors and quarterly or annually over two to four years for grants issued to employees. For stock option awards, all awards granted under the 2017 Stock Plan are stock-settled with common stock issued upon exercise. For restricted stock awards, shares are issued to the recipient upon grant with a restrictive legend and are not included in the calculation of outstanding shares until vesting occurs. At December 31, 2021, there were 3.9 million shares available for future grants under the 2017 Stock Plan. Zynex, Inc. 2005 Stock Option Plan The 2005 Stock Option Plan (the “2005 Stock Plan”) expired as of December 31, 2014. Vesting provisions of the expired plan were to be determined by the Board of Directors. All stock options under the 2005 Stock Plan expire no later than ten years from the date of grant. Options granted in 2015, 2016 and through May 2017 prior to the approval of the 2017 Stock Incentive Plan were approved and certified by the board of directors on September 6, 2017 under the existing 2005 Stock Plan. F-18 Table of Contents As of December 31, 2021, the Company had the following stock options outstanding and exercisable: Plan Category 2005 Stock Option Plan Equity Compensation Plans not approved by Shareholders 2017 Stock Option Plan Total Outstanding Number of Options Exercisable Number of Options (in thousands) (in thousands) 325 28 412 765 325 28 317 670 The Company received $0.2 million cash proceeds related to option exercises during the year ended December 31, 2021. The Company received cash proceeds of $0.6 million related to option exercises during the year ended December 31, 2020. The Company did not grant any stock options during the year ended December 31, 2021. The Company granted 14,000 stock options during the year ended December 31, 2020. The Company used the Black Scholes option pricing model to determine the fair value of stock option grants, using the following assumptions for the year ended December 31, 2020: Weighted average expected term Weighted average volatility Weighted average risk-free interest rate Dividend yield 6.79 years 117 % 1.59 % 0 % The weighted average expected term of stock options represents the period of time that the stock options granted are expected to be outstanding based on historical exercise trends. The weighted average expected volatility is based on the historical price volatility of the Company’s common stock. The weighted average risk-free interest rate represents the U.S. Treasury bill rate for the expected term of the related stock options. The dividend yield represents the Company’s anticipated cash dividend over the expected term of the stock options. Forfeitures are accounted for as they occur. The following table summarizes stock-based compensation expenses recorded in the condensed consolidated statements of operations (in thousands): Cost of revenue Sales and marketing expense General, and administrative Total stock based compensation expense For the Years Ended December 31, 2021 2020 $ $ 56 155 1,419 1,630 $ $ 37 424 2,220 2,681 The excess tax benefit associated with our stock-based compensation plans for the years ended December 31, 2021 and 2020, was approximately $0.2 million and $1.7 million, respectively. F-19 Table of Contents A combined summary of stock option activity for all plans for the years ended December 31, 2021 and 2020 is presented below: Outstanding at December 31, 2019 Granted Exercised Forfeited Outstanding at December 31, 2020 Outstanding at December 31, 2020 Granted Exercised Forfeited Outstanding at December 31, 2021 Exercisable at December 31, 2021 Number of Shares (in thousands) Weighted Average Strike Price Weighted Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (in thousands) 2,041 $ $ 15 (684) $ (265) $ $ 1,107 1,107 $ — $ (116) $ (226) $ $ 765 $ 670 2.25 9.23 0.82 4.25 2.76 2.76 — 4.87 6.45 1.36 0.99 6.47 $ 10,483 4.68 4.33 $ $ 5,896 5,412 Range $0 to $2.00 $2.01 to $4.00 $4.01 to $10.00 Outstanding Number of Options (in thousands) Weighted average Remaining Contractual Life (years) Weighted Average Strike Price Exercisable Number of Remaining Exercisable Options (in thousands) Contractual Life (years) Weighted Average Exercisable Strike Price 495 244 26 765 3.54 6.65 7.92 4.68 $ $ $ $ 0.31 2.72 8.51 1.36 495 167 8 670 3.54 6.48 7.82 4.33 $ $ $ $ 0.31 2.62 8.21 0.99 A summary of our unvested stock options as of December 31, 2021 and 2020 and related activity is presented below : Non-vested at December 31, 2019 Granted Vested Forfeited Non-vested at December 31, 2020 Non-vested at December 31, 2020 Granted Vested Forfeited Non-vested at December 31, 2021 Non-vested Shares Under Option (in thousands) 979 15 (276) (244) 474 $ $ 474 $ — (167) (212) 95 $ Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (in thousands) 4.03 8.88 3.34 4.36 4.35 4.35 — 1.93 6.48 3.85 7.97 $ 3,677 7.17 $ 484 F-20 Table of Contents A summary of restricted stock award activity under the 2017 Stock Plan for the years ended December 2021 and 2020 are presented below: Outstanding at December 31, 2019 Granted Vested Outstanding at December 31, 2020 Outstanding at December 31, 2020 Granted Vested Forfeited Outstanding at December 31, 2021 Number of Shares (in thousands) Weighted Average Grant Date Fair Value 5.28 11.75 7.76 11.53 $ 112 $ 352 (169) $ $ 295 $ 295 $ 381 (119) $ (103) $ $ 454 11.53 14.15 10.92 12.40 13.69 The fair market value of restricted shares for share-based compensation expensing is equal to the closing price of our common stock on the date of grant. The vesting on the Restricted Stock Awards typically occurs quarterly over three years for the Board of Directors and quarterly or annually over two to four years for management. As of December 31, 2021, there was approximately $5.5 million of total unrecognized compensation costs related to unvested stock options and restricted stock. These costs are expected to be recognized over a weighted average period of 2.7 years. The total intrinsic value of stock option exercises for the years ended December 31, 2021 and 2020 was $1.0 million and $9.6 million, respectively. The total fair value of restricted stock awards vested during the years ended December 31, 2021 and 2020 was $1.3 million. (9) STOCKHOLDERS’ EQUITY Equity Offering On July 17, 2020, the Company completed an underwritten public offering of an aggregate 2.75 million shares of common stock at a public offering price of $20.00 per common share. In the offering, 1.38 million shares of common stock were sold by the Company and 1.37 million shares of common stock were sold by Sandgaard Holdings, LLC, which is 100% controlled by Thomas Sandgaard, CEO and Chairman of the Board of Directors. Net proceeds to the Company, after deducting for direct costs associated with the offering, were $25.2 million. Common Stock Dividend The Company's Board of Directors declared a cash dividend of $0.10 per share and a stock dividend of 10% per share on November 9, 2021. The cash dividend of $3.6 million was paid out on January 21, 2022 to stockholders of record as of January 6, 2022. The 10% stock dividend declaration resulted in the issuance of an additional 3.6 million shares on January 21, 2022 to stockholders of record as of January 6, 2022. Treasury Stock On March 8, 2021, our Board of Directors approved a program to repurchase up to $10.0 million of our common stock at prevailing market prices either in the open market or through privately negotiated transactions through September 8, 2021. From the inception of the plan through September 8, 2021, the Company purchased 175,179 shares of our common stock for $2.7 million or an average price of $15.22 per share. F-21 Table of Contents Warrants A summary of stock warrant activity for the years ended December 31, 2021 and 2020 are presented below: Outstanding at December 31, 2019 Granted Exercised Forfeited Outstanding and exercisable at December 31, 2020 Outstanding at December 31, 2020 Granted Exercised Forfeited(1) Outstanding and exercisable at December 31, 2021 Number of Warrants (in thousands) Weighted Average Remaining Contractual Aggregate Intrinsic Value Life (Years) (in thousands) 525 4.77 $ Weighted Average Exercise Price 110 $ 2.39 — $ — — $ — — $ — $ 2.39 110 110 $ 2.39 — $ — (10) $ 2.27 (1) $ 2.27 $ 2.40 99 3.76 3.76 2.76 2.76 2.76 $ $ $ 1,084 1,084 192 25 660 (1) Warrants were exercised under a net exercise provision in the warrant agreement. As a result, approximately 1,000 warrants were forfeited in lieu of cash payment for shares. (10) INCOME TAXES The pre-tax income from continuing operations on which the provision for income taxes was computed is as follows (in thousands): United States Foreign Total $ 2021 22,295 (24) 22,271 $ 2020 10,185 (32) 10,153 Income tax expense consists of the following for the years ended December 31, 2021 and 2020 (in thousands): Current tax expense: Federal State Total tax expense: Deferred tax expense/(benefit): Federal State Total deferred tax expense/(benefit): Total F-22 2021 2020 $ $ $ 4,289 1,025 5,314 (135) (11) (146) 5,168 $ $ $ 841 292 1,133 (122) 68 (54) 1,079 Table of Contents A reconciliation of income tax computed at the U.S. statutory rate of 21% to the effective income tax rate is as follows: Statutory rate State taxes Permanent differences and other Stock based compensation Effective rate 2021 2020 21 % 4 % 0 % (1)% 24 % 21 % 3 % 1 % (15)% 10 % The tax effects of temporary differences that give rise to deferred tax assets (liabilities) at December 31, 2021 and 2020 are as follows (in thousands): Deferred tax assets: Accrued expenses Lease liability Accounts receivable Inventory Stock based compensation Tax credits and NOL carryforward Other Amortization Less: valuation allowance Deferred tax assets Deferred tax liabilities: Property and equipment Finance lease Prepaid expenses Right-of-use-asset Deferred tax liabilities Net deferred tax assets 2021 2020 $ 26 4,620 18 484 271 8 — 90 5,517 — $ 5,517 10 1,721 18 495 306 20 1 43 2,614 — 2,614 (599) (96) (77) (4,034) (4,806) 711 $ $ $ (470) (78) (20) (1,480) (2,048) 566 $ $ $ $ $ As of December 31, 2021, the Company has net operating loss carryforwards in various states of approximately $0.2 million, which expire at various dates ranging from five to seven years. In addition, the Company had no recorded valuation allowances at December 31, 2021 and 2020. The accounting standard related to income taxes applies to all tax positions and defines the confidence level that a tax position must meet in order to be recognized in the financial statements. The accounting standard requires that the tax effects of a position be recognized only if it is "more- likely-than-not" to be sustained by the taxing authority as of the reporting date. If a tax position is not considered "more-likely-than-not" to be sustained, then no benefits of the position are to be recognized. Differences between financial and tax reporting which do not meet this threshold are required to be recorded as unrecognized tax benefits. This standard also provides guidance on the presentation of tax matters and the recognition of potential interest and penalties. As of December 31, 2021 and 2020, the Company does not have an unrecognized tax liability. The Company does not classify penalty and interest expense related to income tax liabilities as an income tax expense. Penalties and interest are included within general and administrative expenses on the consolidated statements of income. The Company files income tax returns in the U.S. and various state jurisdictions, and there are open statutes of limitations for taxing authorities to audit our tax returns from 2016 through the current period. F-23 Table of Contents (11) LEASES The Company categorize leases at their inception as either operating or financing leases. Leases include various office and warehouse facilities which have been categorized as operating leases while certain equipment is leased under financing leases. The Company entered into a sublease agreement on April 9, 2021 with Cognizant Trizetto Software Group, Inc. for up to approximately 110,754 square feet of office space as its new corporate headquarters. The term of the sublease began on May 1, 2021 and will run through April 29, 2028. The Company is entitled to rent credits equal to twenty-one months of base rent at the initial rate. During the first thirty-three months of the sublease, the rent per square foot is $26.50. The price per square foot increases by an additional $0.50 during each subsequent twelve-month period of the sublease. Upon lease commencement, the Company recorded an operating lease liability and a corresponding right-of-use asset for $13.4 million each. The remaining lease term was 5.38 years at December 31, 2021. The Company’s operating leases do not provide an implicit rate, and therefore the Company uses its incremental borrowing rate as the discount rate when measuring the lease liability. The incremental borrowing rate represents an estimate of the interest rate the Company would incur at lease commencement to borrow an amount equal to the lease payments on a collateralized basis over the term of a lease. The Company’s weighted average borrowing rate was determined to be 4.11% for its operating lease liabilities. The Company’s equipment lease agreements have a weighted average rate of 9.37% which was used to measure its finance lease liability. The table below reconciles the undiscounted future minimum lease payments under the Company’s operating and finance leases to the total operating and capital lease liabilities recognized on the consolidated balance sheets as of December 31, 2021 (in thousands): 2022 2023 2024 2025 2026 Thereafter Total undiscounted future minimum lease payments Less: difference between undiscounted lease payments and discounted lease liabilities: Total lease liabilities Operating Lease Liability 3,569 2,982 3,496 3,567 3,362 4,214 21,190 $ (2,475) 18,715 $ Finance Lease Liability 154 152 116 76 15 — 513 (78) 435 $ $ Operating and finance lease costs were $3.7 million and $1.8 million for years ended December 31, 2021 and 2020, which were included in the consolidated statement of operations under the following headings (in thousands): Operating Lease expense Costs of revenue - devices and supplies Sales and marketing expense General and administrative Total operating lease expense Finance Lease expense Amortization of right-of-use asset: Costs of revenue - devices and supplies Sales and marketing expense General and administrative Total amortization of right-of-use asset Interest expense and other Total finance lease expense F-24 For the years ended December 31, 2021 2020 $ $ $ $ 399 1,186 1,964 3,549 12 35 58 105 41 146 $ $ $ $ 208 564 909 1,681 8 20 33 61 20 81 Table of Contents The Company’s 10-K filing for the year ended December 31, 2020, included an error which disclosed $6.51 million of operating lease expense. The corrected operating lease expense of $1.68 million for the year ended December 31, 2020, is included in the table above. F-25 Table of Contents (12) FAIR VALUE CONSIDERATION The Company’s asset and liability classified financial instruments include cash, accounts receivable, accounts payable, accrued liabilities, and contingent consideration. The carrying amounts of financial instruments, including cash, accounts receivable, accounts payable and accrued liabilities approximate their fair value due to their short maturities. The Company measures its long-term debt at fair value which approximates book value as the long-term debt bears market rates of interest. The fair value of acquisition-related contingent consideration is based on a Monte Carlo models. The valuation policies are determined by management, and the Company’s Board of Directors is informed of any policy change. Authoritative guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The guidance establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions of what market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on reliability of the inputs as follows: Level 1: Inputs that reflect unadjusted quoted prices in active markets that are accessible to Zynex for identical assets or liabilities; Level 2: Inputs include quoted prices for similar assets and liabilities in active or inactive markets or that are observable for the asset or liability either directly or indirectly; and Level 3: Unobservable inputs that are supported by little or no market activity. The Company’s assets and liabilities which are measured at fair value on a recurring basis are classified in their entirety based on the lowest level of input that is significant to their fair value measurement. The Company’s policy is to recognize transfers in and/or out of fair value hierarchy as of the date in which the event or change in circumstances caused the transfer. The Company has consistently applied the valuation techniques discussed below in all periods presented. The following table presents Company’s financial liabilities that were accounted for at fair value on a recurring basis as of December 31, 2021, by level within the fair value hierarchy: Contingent consideration Total Fair Value at December 31, 2021 $ $ 9,700 9,700 $ $ F-26 Fair Value Measurements at December 31, 2021 Quoted Priced in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (In thousands) — $ — $ 9,700 — $ — $ 9,700 Table of Contents Contingent Consideration. The Company classifies its contingent consideration liability in connection with the acquisition of Kestrel Labs within Level 3 as factors used to develop the estimated fair value are unobservable inputs that are not supported by market activity. The contingent consideration related to Kestrel was valued at $9.7 million using a Monte Carlo simulation as of December 22, 2021. As of December 31, 2021, the contingent consideration remained estimated at $9.7 million. The Company’s policy is to value contingent consideration liabilities using a Monte Carlo model. The Company did not have any contingent consideration as of December 31, 2020. (13) COMMITMENTS AND CONTINGENCIES See Note 11 for details regarding commitments under the Company’s long-term leases. From time to time, the Company may become party to litigation and other claims in the ordinary course of business. To the extent that such claims and litigation arise, management provides for them if losses are determined to be both probable and estimable. On occasion, the Company engages outside counsel related to a broad range of topics including employment law, third-party payer matters, intellectual property and regulatory and compliance matters. The Company is currently not a party to any material pending legal proceedings that would give rise to potential loss contingencies. (14) CONCENTRATIONS The Company is exposed to concentration of credit risk related primarily to its cash balances. The Company maintains its cash balances in major financial institutions that exceed amounts insured by the FDIC (up to $250,000, per financial institution as of December 31, 2021). The Company has not experienced any realized losses in such accounts and believes it is not exposed to any significant credit risk related to its cash. The Company had two major vendors from which it sourced approximately 34% and one major vendor from which it soured approximately 22%, respectively, of supplies for its electrotherapy products for the years ended December 31, 2021 and 2020. Management believes that its relationships with its suppliers are good. If the relationships were to be replaced, there may be a short-term disruption for a period of time in which products may not be available and additional expenses may be incurred as the Company locates additional or replacement suppliers. The Company had receivables from one third-party payer at December 31, 2021 which made up approximately 22% of the accounts receivable balance. The Company had receivables from one third-party payer at December 31, 2020, which made up approximately 26% of the accounts receivable balance. (15) RETIREMENT PLAN In 2012, the Company established a defined contribution retirement plan for its employees under section 401(k) of the Internal Revenue Code (the “401(k) Plan”) that is available to all employees 18 years of age or older with three months of service. All employee contributions are fully vested immediately and employer contributions vest over a period of four years. The Company has a discretionary employee match program and currently matches 35% of first 6% of an employee’s contributions. During the years ended December 31, 2021 and 2020, the Company recorded an expense of $0.5 million and $0.3 million, respectively, under the aforementioned plan, related to the Company match. F-27 Table of Contents (16) QUARTERLY FINANCIAL INFORMATION (UNAUDITED) Quarterly financial information is as follows (in thousands, except per share data): Total Revenue Less: cost of revenue and operating expenses Income from operations Income before income taxes Net income Net income per common share: Basic income per share - net income Diluted income per share - net income $ $ $ Total Revenue Less: cost of revenue and operating expenses Income from operations Income before income taxes Net income Net income per common share: Basic income per share - net income Diluted income per share - net income $ $ $ First Quarter 24,127 $ Second Quarter 31,022 $ Third Quarter 34,785 $ Fourth Quarter 40,367 $ 2021 25,207 (1,080) (1,087) (706) (0.02) (0.02) $ $ $ 27,209 26,739 3,813 3,768 2,808 0.07 0.07 $ $ $ 2020 8,046 8,028 6,107 0.16 0.16 $ $ $ 28,780 11,587 11,562 8,894 0.23 0.23 First Quarter Second Quarter Third Quarter Fourth Quarter 25,605 20,026 19,263 15,228 $ $ $ $ 12,770 15,178 18,617 23,308 4,085 4,080 3,017 0.08 0.08 $ $ $ 1,409 1,404 1,333 0.04 0.03 $ $ $ 2,297 2,215 1,787 0.05 0.05 2,458 2,454 2,937 0.08 0.08 $ $ $ F-28 Table of Contents (17) SUBSEQUENT EVENTS On January 21, 2022, the Company paid out the one-time special stock dividend of 10% and cash dividend of $0.10 per share that was declared on November 9, 2021. The stock dividend resulted in an issuance of approximately 3.6 million additional shares of common stock and the cash distribution was approximately $3.6 million. All share amounts were updated retrospectively in this report to reflect this issuance. (18) COVID-19 In December 2019, a novel Coronavirus disease (“COVID-19”) was reported and on March 11, 2020, the World Health Organization characterized COVID-19 as a pandemic. During 2020 and 2021, the Company’s operations were impacted by closures of clinics and reductions in elective surgeries which decreased availability of physicians to prescribe our products. Additionally, the Company had to navigate the impacts it had on employee and supply chain issues. While the Company did not see a significant impact on its operating results or financial position during the year ended December 31, 2021 from COVID-19, it is unable at this time to predict the impact that COVID-19 will have on its business, financial position and operating results in future periods due to numerous uncertainties. The Company has been and continues to closely monitor the impact of the pandemic on all aspects of its business. F-29 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 Exhibit 4.2 Zynex Inc. (“Zynex” or the “Company”) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). DESCRIPTION OF COMMON STOCK The authorized capital stock of the Company consists of 100,000,000 shares of common stock at a par value of $0.001 per share and 10,000,000 shares of preferred stock at par value of $0.001 per share. Holders of the Company’s common stock are entitled to one vote for each share held of record on all matters to be voted on by the stockholders. Holders of common stock are entitled to receive dividends ratably, when, as and if declared by the board of directors, out of funds legally available. In the event of liquidation, dissolution or winding-up the holders of common stock are entitled to share equally and ratably in all assets remaining available for distribution after payment of liabilities and after provision is made for each class of stock, if any, having preference over the common stock. Holders of common stock have no conversion, preemptive, or other subscription rights and there are no redemption provisions applicable to the common stock. Dividends Our Board of Directors declared a one-time special cash dividend of $0.07 per share during the fourth quarter of 2018, which was paid in January 2019 and a one-time cash dividend of $0.10 per share and a 10% stock dividend during the fourth quarter of 2021, which was paid out and issued in January 2022. There can be no guarantee that we will continue to pay dividends. Any future determination to pay cash dividends will be at the discretion of the Board of Directors and will be dependent upon our financial condition, results of operations, capital requirements and such other factors as the Board deems relevant. Name Zynex Medical, Inc. Zynex Monitoring Solutions, Inc. Zynex NeuroDiagnostics, Inc. Zynex Europe, ApS Pharmazy, Inc Kestrel Labs, Inc. SUBSIDIARIES OF ZYNEX, INC. Jurisdiction Colorado Colorado Colorado Denmark Colorado Colorado Exhibit 21 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Zynex Inc.’s Registration Statements on Form S-3 (File Nos. 333-230128 and 333-232367) and on Form S-8 (File No. 333-220366) of our report dated February 24, 2022, relating to the December 31, 2021 consolidated financial statements which appears in Zynex, Inc.’s Form 10-K for the year ended December 31, 2021. Exhibit 23.1 March 21, 2022 Denver, CO /s/ Plante & Moran PLLC Exhibit 31.1 I, Thomas Sandgaard, certify that: 1. I have reviewed this annual report on Form 10-K of Zynex, Inc.; CERTIFICATION 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(s) 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; c) 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 d) 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(s) 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. Dated: March 21, 2022 /s/ THOMAS SANDGAARD Thomas Sandgaard Chairman, President, Chief Executive Officer and Principal Executive Officer Exhibit 31.2 I, Daniel Moorhead, certify that: 1. I have reviewed this annual report on Form 10-K of Zynex, Inc.; CERTIFICATION 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(s) 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; c) 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 d) 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(s) 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. Dated: March 21, 2022 /s/ DANIEL MOORHEAD Daniel Moorhead Chief Financial Officer and Principal Financial and Accounting Officer CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Exhibit 32.1 Each of the undersigned hereby certifies, for the purposes of Section 1350 of Chapter 63 of Title 18 of the United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in his capacity as an officer of Zynex, Inc. (“Zynex”), that to his knowledge: 1. This Annual Report on Form 10-K for the year ended December 31, 2021 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in such Report fairly presents, in all material respects, the financial condition and results of operations of Zynex for the period covered by this Report. This Certification is executed as of March 21, 2022 /s/ THOMAS SANDGAARD Thomas Sandgaard Chairman, President, Chief Executive Officer and Principal Executive Officer CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Exhibit 32.2 Each of the undersigned hereby certifies, for the purposes of Section 1350 of Chapter 63 of Title 18 of the United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in his capacity as an officer of Zynex, Inc. (“Zynex”), that to his knowledge: 1. This Annual Report on Form 10-K for the year ended December 31, 2021 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in such Report fairly presents, in all material respects, the financial condition and results of operations of Zynex for the period covered by this Report. This Certification is executed as of March 21, 2022 /s/ DANIEL MOORHEAD Daniel Moorhead Chief Financial Officer and Principal Financial and Accounting Officer 

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