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iRhythm

irtc · NASDAQ Healthcare
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Employees 501-1000
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FY2019 Annual Report · iRhythm
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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

TRANSITION PERIOD FROM                      TO                     

For the fiscal year ended December 31, 2019
OR

Commission File Number 001-37918
________________________________________________________________________________________________________

iRhythm Technologies, Inc.

(Exact name of Registrant as specified in its Charter)
________________________________________________________________________________________________________

Delaware
(State or other jurisdiction of
incorporation or organization)
699 8th Street, Suite 600
San Francisco, California
(Address of principal executive offices)

20-8149544
(I.R.S. Employer
Identification No.)

94103
(Zip Code)

Registrant’s telephone number, including area code: (415) 632-5700
________________________________________________________________________________________________________

Securities registered pursuant to Section 12(b) of the Act: Common Stock, Par Value $.001 Per Share, Common Stock traded on the NASDAQ stock market
Securities registered pursuant to Section 12(g) of the Act: None
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 and post such files). Yes ☒ No ☐
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405) is not contained herein, and will not be contained, to the best of Registrant’s knowledge,
in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☐
Indicate  by  check  mark  whether  the  Registrant  is  a  large  accelerated  filer,  an  accelerated  filer,  a  non-accelerated  filer,  a  smaller  reporting  company,  or  an  emerging  growth  company.  See  the
definition of “large accelerated filer”, “accelerated filer”, “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer
Non-accelerated filer

Emerging growth company

☒

☐

☐

Accelerated filer

Small reporting 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 is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒
The aggregate market value of the voting and non-voting common equity held by non-affiliates of the Registrant, based on the closing price of the shares of common stock on The NASDAQ Stock
Market on June 30, 2019, was approximately $1,950 million.
The number of shares of Registrant’s Common Stock outstanding as of February 21, 2020 was 26,801,044.

DOCUMENTS INCORPORATED BY REFERENCE:
Portions of the information called for by Part III of this Form 10-K is hereby incorporated by reference from the definitive Proxy Statements for our annual meeting of stockholders, which will be
filed with the Securities and Exchange Commission not later than 120 days after December 31, 2019.

Common Stock, Par Value $.001 Per Share

Title of each class

Trading Symbol

IRTC

Name of each exchange on which registered

The Nasdaq Stock Market

Table of Contents

PART I

Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.

PART II
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.

PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV

Item 15.

Table of Contents

Business
Risk Factors
Unresolved Staff Comments
Properties
Legal Proceedings
Mine Safety Disclosures

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Selected Consolidated Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information

Directors, Executive Officers and Corporate Governance
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Certain Relationships and Related Transactions, and Director Independence
Principal Accounting Fees and Services

Exhibits, Financial Statement Schedules

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Table of Contents

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This  Annual  Report  on  Form  10-K  contains  forward-looking  statements  concerning  our  business,  operations  and  financial  performance  and
condition, as well as our plans, objectives and expectations for our business, operations and financial performance and condition. Any statements contained
herein that are not statements of historical facts may be deemed to be forward-looking statements. In some cases, you can identify forward-looking statements
by  terminology  such  as  “anticipate,”  “assume,”  “believe,”  “contemplate,”  “continue,”  “could,”  “due,”  “estimate,”  “expect,”  “goal,”  “intend,”  “may,”
“objective,” “plan,” “predict,” “potential,” “positioned,” “seek,” “should,” “target,” “will,” “would” and other similar expressions that are predictions of or
indicate future events and future trends, or the negative of these terms or other comparable terminology. These forward-looking statements include, but are
not limited to, statements about:

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plans to conduct further clinical studies;

our plans to modify our current products, or develop new products, to address additional indications;

the expected growth of our business and our organization;

our expectations regarding government and third-party payor coverage and reimbursement;

our expectations regarding the size of our sales organization and expansion of our sales and marketing efforts in international geographies;

our expectations regarding revenue, cost of revenue, cost of service per device, operating expenses, including research and development
expense, sales and marketing expense and general and administrative expenses;

our ability to retain and recruit key personnel, including the continued development of a sales and marketing infrastructure;

our ability to obtain and maintain intellectual property protection for our products;

our estimates of our expenses, ongoing losses, future revenue, capital requirements and our needs for, or ability to obtain, additional
financing;

our ability to identify and develop new and planned products and acquire new products;

our financial performance; and

developments and projections relating to our competitors or our industry.

We believe that it is important to communicate our future expectations to our investors. However, there may be events in the future that we are not
able  to  accurately  predict  or  control  and  that  may  cause  our  actual  results  to  differ  materially  from  the  expectations  we  describe  in  our  forward-looking
statements. These forward-looking statements are based on management’s current expectations, estimates, forecasts and projections about our business and
the industry in which we operate and management’s beliefs and assumptions and are not guarantees of future performance or development and involve known
and unknown risks, uncertainties and other factors that are in some cases beyond our control. As a result, any or all of our forward-looking statements in this
Annual  Report  on  Form  10-K  may  turn  out  to  be  inaccurate.  Factors  that  may  cause  actual  results  to  differ  materially  from  current  expectations  include,
among other things, those listed under “Risk Factors” and elsewhere in this Annual Report on Form 10-K. Potential investors are urged to consider these
factors carefully in evaluating the forward-looking statements. These forward-looking statements speak only as of the date of this Annual Report on Form 10-
K. We assume no obligation to update or revise these forward-looking statements for any reason, even if new information becomes available in the future.

You  should  not  rely  upon  forward-looking  statements  as  predictions  of  future  events.  Although  we  believe  that  the  expectations  reflected  in  the
forward-looking statements are reasonable, we cannot guarantee that the future results, levels of activity, performance or events and circumstances reflected in
the forward-looking statements will be achieved or occur. We undertake no obligation to update publicly any forward-looking statements for any reason after
the date of this Annual Report on Form 10-K to conform these statements to actual results or to changes in our expectations.

You should read this Annual Report on Form 10-K and the documents that we reference in this Annual Report on Form 10-K and have filed with the
SEC  as  exhibits  to  the  Annual  Report  on  Form  10-K  with  the  understanding  that  our  actual  future  results,  levels  of  activity,  performance  and  events  and
circumstances may be materially different from what we expect.

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Table of Contents

Item 1. Business.

Overview

PART I

We  are  a  digital  healthcare  company  redefining  the  way  cardiac  arrhythmias  are  clinically  diagnosed  by  combining  our  wearable  biosensing
technology with cloud-based data analytics and deep-learning capabilities. Our goal is to be the leading provider of ambulatory electrocardiogram (“ECG”)
monitoring for patients at risk for arrhythmias. We have created a full portfolio of ambulatory cardiac monitoring services on a unique platform, called the Zio
service, which combines an easy-to-wear and unobtrusive biosensor that can be worn for up to 14 consecutive days with powerful proprietary algorithms that
distill data from millions of heartbeats into clinically actionable information. We believe that the Zio service allows physicians to diagnose many arrhythmias
more  quickly  and  efficiently  than  traditional  technologies  and  avoid  multiple  indeterminate  tests.  Early  detection  of  heart  rhythm  disorders,  such  as  atrial
fibrillation (“AF”) and other clinically relevant arrhythmias, allows for appropriate medical intervention and helps avoid more serious downstream medical
events, including stroke. Since receiving clearance from the Food and Drug Administration (“FDA”) in 2009, we have provided the Zio service to over two
million  patients  and  have  collected  over  500  million  hours  of  curated  heartbeat  data,  creating  what  we  believe  to  be  the  world’s  largest  repository  of
ambulatory ECG patient data. This data provides us with a competitive advantage by informing our proprietary deep-learned algorithms, which may enable
operating efficiencies, gross margin improvement and business scalability. We believe the Zio service is well aligned with the goals of the U.S. healthcare
system: improving population health, enhancing the patient care experience reducing per-capita cost, and improving the clinician experience.

According to the Centers for Disease Control and Prevention, approximately 11 million patients in the United States have a heart rhythm disorder, or
arrhythmia. The most common sustained type of arrhythmia is AF. The American Heart Association (“AHA”), estimates that as many as six million people in
the United States have AF with at least one-third of these patients being asymptomatic at the time of their diagnosis. Individuals with AF are five times more
likely to suffer a stroke; however, the National Stroke Association (“NSA”) estimates that up to 80% of strokes suffered by people with AF are preventable
with early detection and proper treatment.

The ambulatory cardiac monitoring market is well-established with an estimated 4.6 million diagnostic tests performed annually in the United States,
which we believe to be an existing $1.8 billion market opportunity for our Zio service. Traditional ambulatory cardiac monitoring tools used by physicians for
diagnosing patients with suspected arrhythmias, such as Holter and cardiac event monitors, are constrained by one or more of the following: short prescribed
monitoring  times,  non-continuous  data  collection  and  reporting,  cumbersome  equipment  and  low  patient  compliance.  As  an  example  of  these  traditional
constraints,  patients  often  remove  these  traditional  monitors  when  sleeping,  showering  or  exercising,  leading  to  failure  to  capture  critical  data.  These
limitations contribute to incomplete diagnoses and repeat testing, which in turn result in suboptimal patient care and higher costs to the health system.

We believe the Zio service provides a comprehensive solution that addresses all of these limitations and offers a clear value proposition to patients,
providers, and payors by providing an easy-to-use, clinically proven, cost-effective platform solution. Our Zio service is prescribed by physicians for both
identifying  arrhythmias  as  well  as  for  identifying  risk  factors  which  may  be  associated  with  a  previously-identified  arrhythmia.  It  improves  physician
management and diagnosis of arrhythmias by providing a patient-friendly wearable biosensor, curating and analyzing voluminous uninterrupted continuous
ECG data, and ultimately creating a concise report that is used by the physician to make a diagnosis that can be integrated into a patient’s electronic health
record. We believe our Zio service can continue taking significant market share from the existing ambulatory cardiac monitoring market and expanding the
market for new clinical use cases and indications. We believe the Zio service has the potential to supplant traditional technology and become the primary
monitoring  option  for  patients  who  are  candidates  for  ambulatory  cardiac  monitoring  due  to  its  ability  to  detect  more  arrhythmias  with  a  high  degree  of
clinical accuracy, which allows for earlier changes in clinical patient management.

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The Zio service consists of:

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wearable  patch-based  biosensors,  Zio  XT  and  Zio  AT  monitors,  which  continuously  records  and  stores  ECG  data  from  every  patient
heartbeat for up to 14 consecutive days. Zio AT offers the option of timely transmission of data during the prescribed wear period

cloud-based analysis of the recorded cardiac rhythms using our proprietary, deep-learned algorithms

a final quality assessment review of the data by our certified cardiographic technicians

an easy-to-read Zio report, which is a curated summary of findings that includes high-quality and clinically-actionable information which
is sent directly to a patient’s physician and can be integrated into a patient’s electronic health record

We refer to both the Zio AT monitor, and the Zio XT monitor herein as our Zio monitor(s), unless otherwise specified.

We have reviewed a body of clinical evidence which we interpret to show, among other advantages, that the Zio service helps reduce healthcare costs
and  improves  arrhythmia  detection,  characterization  and  diagnosis  by  prescribing  physicians.  These  improvements  have  the  potential  to  change  clinical
management of patients. Our clinical evidence is helping to drive physician adoption. We interpreted one study of the Zio service, published in The American
Journal  of  Cardiology  in  August  2013,  to  show  that  among  16,142  consecutive  Zio  service  patients  in  whom  an  arrhythmia  was  detected,  over  50%  of
symptomatic arrhythmias detected by the Zio service occurred more than 48 hours into the wear period. Although this study did not directly compare the Zio
service to Holter monitoring performance, it should be noted that 48 hours is outside of the typical wear period for Holter monitors. Furthermore, an internal
analysis of 500,000 consecutive Zio records concluded that the first incidence of certain critical arrhythmias, specifically ventricular tachycardia, pause, AV
block and atrial fibrillation, occurred beyond 7 days in 22%, 18%, 16%, and 13% of patients, respectively. Based upon our review of another prospective
comparative study against Holter monitor, published in The American Journal of Medicine in January 2014, we concluded that the Zio service detected 96
arrhythmia events compared to 61 arrhythmia events detected by the Holter monitor (P < 0.001), providing a 57% improvement in diagnostic yield, which is
the percentage of patients in whom an arrhythmia was detected during the monitoring period. In summary, we interpreted the clinical results to show that the
Zio service is preferred by patients and allows for significantly longer continuous monitoring, improved clinical accuracy, increased detection of arrhythmias
by physicians, and meaningful changes in clinical management.

Over two million patients have utilized the Zio service since its commercialization, and as of December 31, 2019, we have achieved both policy
coverage and, where applicable, contracts with the majority of payors in the United States including the Centers for Medicare & Medicaid Services (“CMS”)
and other government agencies. Over 95% of patients in the U.S. are able to access reimbursed Zio services through our third-party payor contracts, our IDTF
participation status with CMS, and self-pay programs when excluding state Medicaid programs. We have designed a comprehensive strategy to allow us to
compete  favorably  in  the  ambulatory  cardiac  monitoring  market,  which  includes  capturing  market  share  from  existing  monitoring  devices  as  well  as
expanding the market through new indications. We expect to drive sales and margin growth in our business by expanding our sales organization, securing
additional contracts with commercial payors, maintaining technology leadership through research and development, and continuing to build clinical evidence
supporting the benefits of the Zio service.

We  have  collected  over  500  million  hours  of  curated  heartbeat  data,  creating  what  we  believe  to  be  the  world’s  largest  repository  of  annotated,
continuous  ambulatory  ECG  recordings  with  contextual  patient  information.  This  extensive  database,  along  with  our  proprietary  analytic  platform,
differentiates the Zio service and gives us a competitive advantage. We will continue to seek opportunities to capitalize on our product design, proprietary
analytic capabilities and data repository to capture additional opportunities in the digital healthcare market.

We are a vertically-integrated company headquartered in San Francisco, California, and we have additional commercial operations and facilities in
Lincolnshire, Illinois, Houston, Texas, and the United Kingdom. We manufacture our devices in Cypress, California. As of December 31, 2019, we had 997
full-time employees. Our revenue was $214.6 million and $147.3 million for the years ended December 31, 2019 and 2018, respectively and we incurred a net
loss of $54.6 million and $50.4 million for those same periods.

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Market Opportunity

Every year, millions of patients experience symptoms potentially associated with cardiac arrhythmias, a condition in which the electrical impulses
that  coordinate  heartbeats  do  not  occur  properly,  causing  the  heart  to  beat  too  quickly,  too  slowly  or  irregularly.  Examples  of  arrhythmias  include  supra
ventricular arrhythmias, which are fast heart rates that originate from the upper chambers of the heart, atrial tachycardia, atrial flutter and AF. The symptoms
of arrhythmias include palpitations or a skipped heartbeat, rapid heartbeat, shortness of breath, dizziness, light-headedness, fainting spells, vertigo, anxiety
and  fatigue  or  no  symptoms  at  all.  Early  detection  is  essential  in  order  to  obtain  early  treatment  and  help  avoid  more  serious  medical  conditions,  such  as
stroke, and additional medical costs.

Atrial Fibrillation and Stroke

In patients with AF, the upper chambers of the heart beat irregularly and blood does not flow properly to the lower chambers of the heart. The AHA
estimates that AF affects as many as six million patients in the United States and 33.5 million patients worldwide. The NSA estimates that one-third of AF
patients  are  asymptomatic  and  still  undiagnosed.  More  than  750,000  hospitalizations  occur  each  year  because  of  AF,  and  the  condition  contributes  to  an
estimated  130,000  deaths  each  year.  Since  AF  is  more  common  among  people  over  the  age  of  60,  these  numbers  are  expected  to  increase  as  the  U.S.
population ages.

In addition, AF is the leading risk factor for stroke because AF can cause blood to collect in the heart and potentially form a clot, which can travel to
the brain potentially resulting in an ischemic stroke. While individuals with AF are approximately five times more likely to suffer a stroke, the NSA estimates
that up to 80% of strokes in people with AF can be prevented through early detection and proper treatment. According to the AHA, stroke costs the United
States an estimated $34 billion each year in healthcare costs and lost productivity, and is a leading cause of serious long-term disability. The AHA estimates
that  ischemic  strokes  represent  87%  of  all  strokes  in  the  United  States  and  that  between  15%  and  20%  of  the  estimated  690,000  ischemic  strokes  are
attributable to AF.

Currently, the Zio service is prescribed by physicians primarily for symptomatic patients. However, we believe that high-risk asymptomatic patients
represent  an  additional  market  opportunity  for  the  Zio  service.  Monitoring  high-risk  asymptomatic  patients  may  lead  to  increased  diagnoses  and  earlier
treatment and potentially avoid more severe downstream conditions, because, as the Framingham Study published in Stroke in September 1995 demonstrated,
18% of AF-related strokes present with asymptomatic AF that is only detected at the time of stroke.

Early  detection  of  AF  is  critical  in  optimizing  patient  care,  delivering  earlier  treatment  to  help  avoid  further  adverse  clinical  events,  managing
symptoms caused by AF, and reducing the total public health burden of treating stroke. The AHA and American Stroke Association (“ASA”) have published
treatment guidelines for patients diagnosed with AF to manage heart rhythm and rate and prevent stroke. These early treatments include:

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medications such as oral anticoagulants

treatment with anti-arrhythmic drugs

interventions such as cardiac ablation therapy to help control heart rhythm and rate

Atrial fibrillation burden, the amount of time a patient spends in AF during a monitoring period, has been identified in the clinical community as an
important measure for determining appropriate and effective therapeutic interventions to manage patients with AF and assessing stroke risk. The calculated
AF burden is only as good as the data available for analysis during the monitoring period. Since the most common type of AF occurs intermittently, long-term
continuous patch-based monitoring, such as the Zio service, more accurately measures AF burden because every heartbeat is recorded without interruption
during the entire monitoring period. A study to determine the correlation between AF burden, as measured by the Zio service, and the risk of stroke in patients
was published in JAMA Cardiology in May 2018. Using this data in combination with electronic health record data from 1,965 patients at two large integrated
health care delivery systems, the researchers concluded that an increase in the burden of AF is independently associated with a higher risk of ischemic stroke
and arterial thromboembolism (“TE”) in patients who are not taking anticoagulant medication. An AF burden of 11.4% or higher was associated with more
than three-fold increased risk for stroke or TE event after adjusting for either CHA2DS2-VASc or ATRIA scores, two tools physicians use to assess stroke
risk.

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Ambulatory Cardiac Monitoring Overview

Arrhythmia symptoms are generally monitored either in a physician’s office or healthcare facility or remotely with the use of ambulatory cardiac
monitoring devices. Typically, physicians will administer a resting ECG in their offices to record and analyze the electrical impulses of patients’ hearts. If
physicians  determine  that  patients  require  monitoring  for  a  longer  period  of  time  to  generate  a  diagnosis,  they  have  historically  prescribed  an  ambulatory
cardiac monitoring device such as a Holter monitor. If the diagnosis is not definitive following the first monitoring period, physicians may prescribe a repeat
Holter monitoring period, or alternatively, prescribe event monitors, mobile cardiac telemetry or implantable loop recorders. Physicians use frequency and
acuity of symptoms to determine which monitoring device to prescribe. Some physicians own their own ambulatory cardiac monitoring devices and provide
ambulatory monitoring services directly to their patients, while others outsource these services to third-party providers.

Holter Monitors

Holter  monitors  are  non-invasive,  ambulatory,  battery-operated  monitoring  products  that  continuously  record  the  ECG  data  of  a  patient,  during  a
typical  prescribed  wear  period  of  24  to  48  hours.  A  Holter  monitor  consists  of  a  recorder,  electrodes  that  are  attached  to  the  patient’s  chest  and  wires,  or
electrode  leads,  connecting  the  electrodes  to  the  recorder.  After  the  prescribed  wear  period,  the  data  recorded  by  the  device  is  delivered  by  hand,  mail  or
internet for processing and analysis by the physician’s office or a third-party provider. Holter monitors are typically prescribed for patients who experience
daily  symptoms.  For  patients  with  suspected  arrhythmias,  Holter  monitors  have  a  relatively  low  diagnostic  yield  of  approximately  24%  due  to  a  limited
prescribed  wear  period  of  typically  no  more  than  48  hours  and  low  patient  compliance,  likely  resulting  from  bulky  equipment  and  cumbersome  electrode
leads. The low diagnostic yield is also attributable to missing data, because patients typically remove the electrodes and disconnect their Holter monitors in
order to shower, sleep and exercise.

Cardiac Event Monitors and Mobile Cardiac Telemetry

Cardiac  event  monitoring  is  another  type  of  non-invasive,  ambulatory  monitoring.  Event  monitoring  differs  from  Holter  monitoring  in  that  the
monitor is prescribed and worn for a longer period of time, up to 30 days, and the data recorded during the wear period are symptom driven. Event monitors
generally  record  several  minutes  of  activity  at  a  time  and  then  start  over,  a  process  referred  to  as  memory  loop  recording.  There  are  many  types  of  event
recorders  available  with  a  range  of  features  including  patient-triggered  or  auto-detected  symptom  recording,  and  manual  data  transmission  or  auto-send.
Typically, physicians prescribe event monitors for patients with lower acuity symptoms. Mobile cardiac telemetry, also known as MCT, is another form of
event monitor that usually uses wireless technology, such as a cell phone network, to transmit event data during the wear period for both patient-triggered and
auto-detected events to a monitoring facility where the ECG data is analyzed and the facility determines if physicians should be notified of significant events.
Typically, physicians prescribe MCT for patients with higher acuity symptoms such as syncope, or fainting, that require more timely notification and actions.

Event and mobile cardiac monitors have several limitations, including limited data storage, the lack of trend data, and poor patient compliance due to
electrode  replacement,  bulky  equipment  and  the  fact  the  patient  must  both  activate  and  transmit  events  in  some  cases.  Additionally,  MCT  technology  has
unique limitations including the need for patients to keep the transmitter close at all times and frequently change the battery or recharge the device to ensure
timely transmissions as well as notifications sent to physicians of non-actionable events. These limitations can severely impact a physician’s ability to provide
a timely diagnosis and result in a lower diagnostic yield. More recently, there have been new MCT products introduced to the market that include patch-based
or combined recorder-transmitter features to try and address some of these limitations.

Implantable Loop Recorders

A separate segment of ambulatory cardiac monitoring consists of implantable diagnostic products such as implantable loop recorders, also known as
insertable  cardiac  monitors.  Implantable  loop  recorders  are  implanted  underneath  a  patient’s  skin  during  a  hospital-based,  minimally-invasive  procedure.
These devices remain implanted in a patient for up to three years, capturing data in a looping manner for patient-triggered or automatically-detected events.
Limitations of this monitoring option include the semi-permanent nature of the implant, infection risks during insertion and removal, non-continuous data
collection, under- or over-sensing which may exhaust the memory of the loop recorder, risk of missing events due to the looping nature of the recording, and
the high cost of the device.

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Limitations of Traditional Ambulatory Cardiac Monitors

Limitations of the various types of traditional ambulatory cardiac monitors can include the following:

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short prescribed monitoring periods leading to low diagnostic yield

non-continuous and interrupted data collection, resulting in an incomplete picture of a patient’s arrhythmia experience

bulky monitoring equipment with dangling electrode leads causing discomfort and low patient compliance

the need to use multiple, often times costly, diagnostic options that would not be necessary if initial tests had produced a higher diagnostic
yield

the generation of excessive and uncurated data for the physician to analyze

over notification of non-actionable events

We believe there is a significant opportunity for a disruptive arrhythmia monitoring solution that offers a portfolio of ambulatory cardiac monitoring
services on a single platform that is cost effective and provides certainty in a single test obtained through uninterrupted continuous monitoring, combined with
patient-friendly design, to enhance compliance and simplify the monitoring experience while maximizing diagnostic yield.

Our Solution

We  have  developed  an  uninterrupted,  long-term  continuous  ambulatory  cardiac  monitoring  platform  known  as  the  Zio  service  that  provides
continuous ambulatory cardiac monitoring through both the Zio XT monitor and Zio AT monitor. The FDA-cleared and CE-marked Zio service combines a
wire-free,  patch-based,  14-day  wearable  biosensor  with  a  proprietary  cloud-based  data  analytic  platform  to  help  physicians  monitor  patients  and  diagnose
arrhythmias with a high degree of accuracy and confidence. Since commercialization, over two million patients have utilized the Zio service, and we have
collected over 500 million hours of heartbeats, creating what we believe to be the world’s largest repository of curated ambulatory ECG patient data.

While wearing either the Zio XT or Zio AT monitor, patients have the ability to mark when symptoms occur by pressing a trigger button on the
device,  and  separately  recording  contextual  data  like  activities  and  circumstances  in  a  written  symptom  diary  or  digitally  via  the  myZio  application.  This
allows physicians to match symptoms and activity with ECG data. Following the wear period, the monitor is returned and data are uploaded to our secure
cloud  and  run  through  our  proprietary,  deep-learned  algorithms.  A  concise  report  of  preliminary  findings  is  prepared  by  our  certified  cardiographic
technicians and made available on our proprietary cloud-based portal, ZioSuite, that allows clinicians to connect via a web browser or mobile application. Zio
AT offers the additional capability of actionable transmissions during the wear period to assist physicians in diagnosing and treating the small percentage of
the population requiring more timely action. During the Zio AT wear period, physicians will receive notifications if there are significant events that meet pre-
determined arrhythmia detection criteria.

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We  believe  the  Zio  service  is  a  disruptive  option  for  ambulatory  cardiac  monitoring.  The  Zio  service  addresses  patient  compliance,  continuously
monitors patients without requiring patient maintenance for up to 14 consecutive days and produces easy-to-read, comprehensive digital reports that provide
the information physicians need to make accurate and timely clinical decisions. Clinical studies have shown that our innovative digital healthcare solution
improves  physicians’  abilities  to  detect  arrhythmias  by  increasing  diagnostic  yield,  and  potentially  allows  them  to  change  the  course  of  treatment.  Our
proprietary deep-learned algorithms give us a competitive advantage due to the depth and breadth of ECG data available from the over 500 million hours of
curated  and  annotated  ECG  data  collected  to  date.  Additionally,  we  believe  we  have  the  first  mover  advantage  in  the  long-term  continuous  market,
particularly related to our efforts to secure both policy coverage and, where applicable, contracts with the majority of payors in the United States including
CMS and other government agencies. As of December 31, 2019, over 95% of patients in the U.S. are able to access reimbursed Zio services through our
third-party payor contracts, our IDTF participation status with CMS, and self-pay programs when excluding state Medicaid programs.

We are actively working to make the Zio service the standard of care for patients who require ambulatory cardiac monitoring. Our solution helps
reduce  healthcare  costs  and  improves  arrhythmia  detection,  characterization  and  diagnosis  by  providing  simple,  seamless  integration  of  heart  rhythm  data
from patient to cloud to physician. We believe we offer a high value, low cost, disruptive solution to a market ready for innovative technology.

Key Benefits

Value to Patients

We  designed  the  Zio  monitor  specifically  to  address  patient  compliance  issues  common  to  other  ambulatory  cardiac  monitors.  Our  wire-free
wearable biosensor is easy to apply, comfortable, lightweight and unobtrusive. The Zio monitor requires no patient management or manipulation during the
wear period because no battery changes, patch changes, adhesive changes or lead wire / electrode management is required. Patients wear it discreetly during
activities  of  daily  life  including  exercising  and  showering  for  up  to  14  consecutive  days.  We  interpreted  a  clinical  study  by  Barrett  et  al  published  in  The
American Journal of Medicine in January 2014, or the Barrett Study, to confirm that the Zio service is a patient-friendly monitoring option, and the study
noted that 94% of patients found the Zio monitor comfortable to wear. The Zio monitor allows patients to mark when a symptom occurs by pressing a button
on the Zio monitor and logging the surrounding circumstances into a written or digital symptom diary, thus allowing physicians to link symptoms with the
ECG  data.  Additionally,  patients  have  access  to  our  professional  24/7  customer  service  team  and  dedicated  financial  counselors  to  address  any  product,
service, enrollment or billing questions.

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Value to Providers

Providers, such as physicians, receive high-quality, easy-to-read, actionable digital reports that help them diagnose patients and streamline clinical
workflow. The Zio service has been shown in multiple peer-reviewed published clinical studies to detect more arrhythmias compared to Holter monitoring
during  their  respective  prescribed  wear  periods  confirming  the  Zio  service's  added  benefit  of  higher  diagnostic  yield  beyond  48  hours  of  wear  time.  We
analyze  and  generate  patient  reports  at  our  CMS-certified  independent  diagnostic  testing  facilities  (“IDTFs”)  staffed  with  our  certified  cardiographic
technicians who specialize in advanced arrhythmia interpretation to help ensure high accuracy and quality of reports before delivering them to the prescribing
physician.  Due  to  high  patient  compliance,  the  reports  include  up  to  14  days  of  non-interrupted  data  correlated  with  patient-triggered  and  diary  symptom
events. Physicians can use this continuous correlated data to more conclusively diagnose arrhythmias.

Accurate  detection  and  higher  diagnostic  yield  allow  physicians  to  more  quickly  prescribe  the  appropriate  treatment  options  for  patients,  while
minimizing the need for repeat testing. From our review, we determined that in 28% of cases observed in a clinical study by Rosenberg et al published in
Pacing and Clinical Electrophysiology in March 2013, or the Rosenberg Study, the physician changed the patient’s clinical management after prescribing the
Zio service as compared to a Holter monitor.

Additionally, the Zio service allows clinical staff to focus on more value-added activities by not requiring electrode changes or battery recharging
during use, device cleaning and maintenance following use, and by reducing physician and hospital staff time needed to review and curate ECG data. Our
24/7 customer service team provides troubleshooting for patient-related issues, removing this burden from the physician practice.

Value to Payors

The Zio service offers a high-yield, low-cost solution compared to other monitoring modalities.

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The  graph  above  compares  the  costs  of  monitoring  to  the  diagnostic  yield  of  various  ambulatory  cardiac  monitors.  The  analysis,  completed  by
Decision  Drivers  Analytics  and  commissioned  by  us,  uses  cost  data  from  the  Centers  for  Medicare  &  Medicaid  Services  (“CMS”)  published  diagnostic
yields, and our internal database, and demonstrates that the Zio service has a diagnostic yield on par with much more expensive devices but superior to less
expensive options. This implies that it is the most cost-effective modality among its peer group, optimizing the cost, time, and reliability of reaching a timely
diagnosis.

Patients  who  use  traditional  Holter  monitors  often  do  not  receive  a  diagnosis  after  one  monitoring  period.  A  retrospective,  longitudinal  study
conducted by Arnold et al published in the Journal of Health Economics and Outcomes Research in February 2015, evaluated the clinical consequences and
costs of CMS patients who had no previous evidence of a cardiac arrhythmia and were undergoing their first Holter monitoring test. Our review of data from
this study indicates that there was no diagnosis reached for 70% of patients after an initial Holter test. The Zio service has been shown to have a low cost per
diagnosis compared to existing monitoring modalities due to its high diagnostic yield.

We believe that the Zio service is the best test for most patients requiring ambulatory cardiac monitoring because it allows physicians to identify a
timely  course  of  treatment  and  avoids  healthcare  costs  associated  with  additional  monitoring.  The  Zio  monitor  is  patient  friendly  and  allows  significantly
longer  and  more  continuous  monitoring,  resulting  in  improved  clinical  accuracy  and  a  potentially  meaningful  change  in  clinical  management.  Better
diagnostic yield results in decreased costs due to fewer additional tests. We believe that the Zio service could reduce the need for multiple consecutive tests
because it offers certainty in a single test.

Early detection of arrhythmias allows physicians to assess a patient’s risk factors and decide on the best treatment course for avoiding potentially
more severe downstream conditions. Specifically, the early detection of AF allows physicians to consider strategies to mitigate the risk of stroke. According
to multiple studies, preventative treatments, such as oral anticoagulants, have been shown to reduce stroke rates by 80%, thereby potentially avoiding the
patient effects of stroke and the high costs associated with post-stroke management.

Our Technology Platform

The  Zio  service  is  built  on  a  proven  technology  platform  that  is  designed  to  integrate  seamlessly  across  the  health  system  to  provide  long-term
continuous ambulatory cardiac monitoring. It consists of (1) a patient-friendly, patch-based biosensor that maximizes patient comfort and compliance, (2) a
deep-learned neural network algorithm that provides accurate analytics and clinical results, (3) skilled clinical and operational staff who utilize proprietary
software to ensure quality in clinical results and are available 24/7 to support physician and patient needs, and (4) a cloud-based portal, ZioSuite, through
which physicians can access and interpret the Zio reports via a web browser or mobile application.

The platform typically collects up to 1.5 million heartbeats of data for each patient during a single application of up to 14 consecutive days. Our Zio service
delivers a curated, concise, and clinically actionable report to the prescribing physician. Through the Zio AT offering, which we fully launched commercially
in October 2019, physicians can access the additional

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capability of timely transmissions during the wear period. During the wear period, physicians will receive notifications and reports if there are significant
events that meet pre-determined arrhythmia detection criteria.

Zio XT and AT monitors

The Zio monitor is a single-use, wire-free, wearable patch-based biosensor that records a patient’s heartbeats and ECG data. The Zio monitor was

specifically designed with the patient and physician in mind. The Zio monitor includes the following features:

•

•

•

•

•

•

•

•

patented clear, flexible, lightweight, wire-free design

unobtrusive and inconspicuous profile

proprietary adhesive backing designed to keep the Zio patch securely in place for the duration of the prescribed wear period

water-resistant functionality, allowing patients to shower, sleep, and perform normal daily activities, including moderate exercise

hydrogel electrodes and a compliant mechanical design to deliver a clear ECG with minimal artifact from movement

large symptom button, or patient trigger, that is easy to find and press

indicated single application wear period of up to 14 days (for longer monitoring prescriptions, additional Zio AT monitors will be provided)

sufficient battery power for the entire wear period, without the need to recharge or replace batteries

Symptoms can be logged through a paper symptom log or through two digital platforms:

•
•

myZio.com website
myZio App (iOS and Android)

The Zio XT service monitors continuously for up to 14 days, delivering a comprehensive report after return and analysis. The Zio AT service
delivers the same comprehensive final report, but also provides physicians with actionable notifications during the wear period. These timely alerts are
provided via a Bluetooth capability in the Zio AT monitor that sends data to a wireless gateway. The wireless gateway, slightly larger than a smart phone, is
provided to the patient at the time of monitor application and will collect and transmit data from the monitor to the cloud via an LTE protocol.

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Enrollment and Initiation of the Zio service

Once a physician determines a patient is a candidate for the Zio service, the patient is enrolled through our online portal, ZioSuite. The wire-free Zio
monitor is applied to the patient’s chest by the clinical staff, and monitoring is initiated. There is also an option for physicians to enroll patients remotely. With
this option, the physician enrolls the patient and the patient receives the Zio monitor in the mail along with a detailed set of self-application instructions.

Monitoring

The Zio monitor is worn continuously by the patient for up to 14 days without the need for patient maintenance. The Zio monitor can be worn in the
shower, while sleeping, and during moderate exercise. During the wear period, the device continuously stores and records all ECG data. The Zio monitor
features a patient trigger button for marking any symptoms during the wear period; the patient is instructed to push the button when a symptom occurs and
make a corresponding entry into the written or digital symptom diary. At the end of the prescribed wear period, the patient removes the device and places it
and the written diary (if applicable) into a pre-paid postal box, which ships to one of our clinical centers.

Data Analysis and Assessment

At one of our clinical centers, the returned device is validated with patient identifiers that are compliant with the Health Insurance Portability and
Accountability Act of 1996, (“HIPAA”), and up to 14 days of heartbeat data is uploaded to be processed through our cloud-based, FDA-cleared proprietary
deep-learned algorithms for highly accurate ECG analysis. When complete, a preliminary curated report is created. Our process can take the equivalent of
30,000 pages of ECG strips and distill it into an actionable summary report of about 10 to 15 pages, summarizing the key findings and providing supporting
details  on  clinically  relevant  events  and  metrics  during  the  wear  period.  Our  certified  cardiographic  technicians  play  a  critical  role  in  report  curation  by
providing a quality review of the data before the final Zio report is electronically delivered to the patient’s physician for final interpretation and diagnosis.

Final Zio Report and the ZioSuite Web Portal

The final Zio report, which is curated for both Zio XT and Zio AT patients, provides information in a concise format for review and interpretation by
the patient’s physician. Data provided includes total analysis time, AF burden, AF duration, comprehensive symptom/rhythm correlation, detailed findings
per day, and arrhythmia type. If pre-determined physician notification criteria for symptoms are met, the prescribing physician is notified by phone of the
serious  findings  prior  to  the  Zio  report  being  made  available  electronically.  The  Zio  report  is  delivered  through  our  secure,  HIPAA  compliant  web  portal,
ZioSuite. ZioSuite is an easy to use, intuitive, and comprehensive portal for clinicians that streamlines clinical workflows to enable cardiac care. By enabling
streamlined workflows, ZioSuite reduces administrative burden and helps to create more time for patient management. Physicians can open the Zio report and
add their interpretation into the report file. These reports can be uploaded into the patients’ electronic medical record for storage and are available for use by
the patient’s other physicians. Excerpts of these reports are included below to highlight the key features.

Up to 14-days continuous recording and storage

Easy-to-read summary

Up to 20,000 minutes
of continuous ECG
data, equivalent to
approximately 1.5
million heartbeats.

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Comprehensive symptom/rhythm correlation

AF Burden

AF Duration

Preliminary findings
based on both the
proprietary algorithms
and certified cardiographic
technicians.

Final interpretation by
a patient’s physician.

Patient-triggered and
symptom logged events
mapped to arrhythmia.

Total AF during
wear period and
daily AF burden.

Total number of AF
episodes categorized
by duration

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Reporting Events During the Wear Period with Zio AT

The Zio service with Zio AT includes a wireless gateway that provides connectivity between the Zio AT monitor and our monitoring center which
enables symptomatic and asymptomatic data transmission during the prescribed wear period. The Zio AT monitor, in conjunction with the wireless gateway
and the unique Zio arrhythmia detection algorithm, has arrhythmia auto-detection capabilities that produce actionable event data for physician review. The
definition of an actionable arrhythmia event is customized by the physician to meet his or her needs, with the intent to reduce the number of over-notifications
of data that do not require more timely medical action. Additionally, patients have the option of pressing a trigger button which marks the continuous record
and initiates a wireless transfer of a 90 second ECG strip to our monitoring center. In addition to the final Zio report, physicians receive daily symptomatic
and auto-detected arrhythmia event reports.

ECG strip of auto-detected actionable arrhythmia event from Zio AT Transmission Report.

Zio AT improves the speed and accuracy of diagnosis relative to traditional mobile cardiac telemetry (MCT) devices and services. The patient-friendly
design  of  the  Zio  monitor  enables  98%  patient  compliance  over  prescribed  wear  times.  We  believe  a  comparative  review  of  published  literature  with  our
clinical  data  indicates  that  the  Zio  AT  solution  is  able  to  detect  critical  arrhythmias  up  to  five  days  sooner  than  the  leading  competitor.  Further  analysis
indicates that Zio AT achieves a higher diagnostic yield in half the time of leading competitive MCT services (83% diagnostic yield in just 14 days vs. 61% of
a competitive service over a 30 day prescription period.) Additionally to date, 99.6% of interpreting physicians have agreed with the findings of the final Zio
AT patient report, which we believe demonstrates efficiency and time-savings gains for interpreting physicians.

Our Collaboration with Verily

On September 3, 2019, we entered into a Development Collaboration Agreement (the “Development Agreement”) with Verily Life Sciences LLC
(an Alphabet Company and referred to as “Verily”). Pursuant to the terms of the Development Agreement, the parties will develop certain next-generation AF
screening,  detection,  or  monitoring  products,  which  involve  combining  Verily  and  our  technology  platforms  and  capabilities.  Under  the  terms  of  the
Development  Agreement,  we  paid  Verily  an  upfront  fee  of  $5  million  in  cash.  In  addition,  we  will  pay  Verily  up  to  an  aggregate  of  $12.75  million  in
additional  milestone  payments  upon  achievement  of  various  development  and  regulatory  milestones  over  the  24  months  of  the  Development  Agreement,
which payments will be made in cash directly to Verily.

The  Development  Agreement  provides  each  party  with  certain  licenses  to  use  certain  intellectual  property  of  the  other  party  for  development
activities in the field of AF screening, detection, or monitoring. Ownership of developed intellectual property will be allocated to the parties depending on the
subject matter of the underlying developed intellectual property, and, for certain subject matter, shall be jointly owned.

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During  the  term  of  the  Agreement,  the  parties  agreed  not  to  collaborate  with  certain  parties  to  develop  or  commercialize  products  on  a  disease
management platform for certain AF patients, and the parties agreed to certain exclusivity provisions on development and commercialization of products for
certain AF patients, subject to exceptions, including contractual rights and rights with respect to pre-existing product offerings.

Business Strategy

Our goal is to be the leading ambulatory cardiac monitoring option for patients at risk for arrhythmias. The key elements of our strategy include:

•

•

•

•

•

Further  penetrating  the  existing  ambulatory  cardiac  monitoring  market.  We  intend  to  expand  our  market  penetration  by  targeting  the
large existing ambulatory cardiac monitoring market in the United States and driving broader awareness of its advantages. We will leverage
our platform of products, Zio XT and Zio AT, as a way of meeting the ambulatory cardiac monitoring needs of targeted large integrated
delivery  networks  (“IDN”).  We  will  continue  to  position  the  Zio  service  as  providing  certainty  in  a  single  test  due  to  high  patient
compliance and superior quality of uninterrupted data.  Zio XT will be positioned as the workhorse service while Zio AT is appropriate for
the smaller percentage of the population that requires timely notification. Marketing and education throughout the medical community are
key  to  bringing  awareness  and  communicating  the  strong  clinical  evidence  backing  the  Zio  service.  In  addition,  we  expect  to  continue
developing  and  publishing  clinical  evidence  to  demonstrate  the  advantages  of  the  Zio  service.  Also,  within  existing  accounts,  we  will
continue  to  introduce  our  Zio  service  beyond  cardiology  and  electrophysiology  into  other  departments,  including  neurology,  emergency
rooms and primary care offices. To enable this broader adoption within a hospital system, we have successfully interfaced the Zio ordering
and report posting processes into a number of large health systems’ Electronic Health Record (“EHR”) systems. This seamless integration
of Zio workflow processes into those already used within the IDN has proven to be a key factor in spurring growth within existing and new
accounts and is an important part of our ongoing market penetration strategy.

Expanding our sales organization in the U.S. To capture new account opportunities and support growth in existing accounts, we have built
a  direct  sales  organization  consisting  of  sales  management,  field  billing  specialists,  quota-carrying  sales  representatives,  and  a  customer
experience team. We will continue to invest in the expansion of this scalable infrastructure and believe this investment will drive adoption
of the Zio service.

Pursuing international expansion opportunities. While our initial commercial focus is the U.S. market, we have initiated efforts that will
allow  for  future  expansion  into  international  geographies.  We  have  an  initial  presence  in  the  United  Kingdom  with  efforts  underway  to
pursue  national  reimbursement.  We  are  also  conducting  diligence  and  prioritizing  other  geographies  based  on  market  size,  regulatory
pathway and reimbursement opportunity.

Expanding indications and clinical use cases. We intend to continue expanding indications and clinical use cases for the Zio service in
untapped  patient  populations  at  risk  for  arrhythmias  through  our  clinical  and  market  development  efforts.  We  believe  these  additional
indications and clinical use cases represent a significant opportunity for us. This market development initiative includes expanding use for
our Zio service into the following patient populations:

◦

◦

◦

◦

◦

patients at high risk for asymptomatic (silent) AF, estimated to be at least ten million patients at any given time;

ongoing management of paroxysmal atrial fibrillation patients, estimated to be one million at any given time;

post-ischemic stroke patients, with an annual incidence of 690,000 patients;

post-cardiac catheter ablation patients, estimated to be 150,000 annual procedures; and

post-transcatheter aortic valve patients, estimated to be 50,000 annual procedures.

Advancing  our  technology  offering  and  continuing  to  solidify  our  footprint  in  digital  healthcare.  We  continue  to  invest  in  building  a
unique, innovative product portfolio that addresses unmet needs in the ambulatory cardiac monitoring market. Additionally, we believe that
we have collected the world’s largest repository of ECG data from ambulatory patients, and we will continue to look for ways to utilize our

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proprietary  data  to  create  value-driving  opportunities  in  digital  healthcare,  such  as  expansion  of  indications  for  the  Zio  service,  new
therapeutic  discoveries,  development  of  an  analytical  engine  for  ambulatory  consumer  and  other  medical  data,  including  the  curation  of
third-party biosensor data and payor and provider decision support, as well as internal operating improvements.

Reimbursement and Revenue from the Zio service

We receive revenue for the Zio service primarily from third-party payors, which include commercial payors and government agencies, such as CMS
and the military. In addition, a small percentage of institutions, which are typically hospitals or private physician practices, purchase the Zio service from us
directly.

Third-party payors require us to identify the service for which we are seeking reimbursement by using a Current Procedural Terminology (“CPT”)
code set maintained by the American Medical Association (“AMA”). For the year ended December 31, 2019, we received 80% of our revenue through third-
party payors. As we continue to contract with more commercial insurers and the patient population ages and becomes eligible for CMS programs, we believe
more of our revenue will convert to third-party payor billing.

Our clinical centers, where we conduct the analysis of ECG data captured by the Zio XT monitor and the Zio AT monitor, are CMS-certified IDTFs
that qualify us as a provider and allow us to bill CMS directly for the Zio service. We meet CMS requirements, including having an independent medical
director for oversight and certified cardiographic technicians for quality assurance of our Zio reports.

Clinical Results and Studies

The  Zio  service  has  been  the  subject  of  many  peer-reviewed  publications  on  its  effectiveness  to  date.  This  body  of  clinical  evidence  is  driving
clinical adoption and clinical use case expansion. The following sections summarize a few of the key clinical studies which have been driving adoption of the
Zio service. In our discussion of the results of these publications, we have indicated changes in percentage terms, regardless of sample size, and the statistical
significance is demonstrated by the relevant p-values, all of which are less than 0.05, which is the commonly accepted threshold for statistical significance.
This follows the convention used by the authors of the study as well as standard clinical practice.

Benefit of 14-Day Continuous Monitoring

A retrospective study by Turakhia et al, published in The American Journal of Cardiology in August 2013, analyzed data from 26,751 patients using
the  Zio  service  for  the  first  time  between  January  1,  2011  and  December  31,  2011.  While  there  was  not  a  direct  comparison  of  the  Zio  service  to  Holter
monitoring performance, we interpreted results from the study to show that among the 16,142 patients with detected, clinically relevant arrhythmias, over
50%  of  the  first-diagnosed  symptomatic  arrhythmias  occurred  after  48  hours  of  monitoring,  suggesting  that  these  arrhythmias  could  have  been  missed  by
traditional Holter monitoring during the typical maximum prescribed monitoring time.

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Diagnostic Yield and Monitoring Preference

In the Barrett study, a prospective head-to-head study comparing the detection of arrhythmias between a 24-hour Holter monitor, which has a typical
prescribed wear period of 24-48 hours, and the 14-day Zio service, a total of 146 patients referred for evaluation of cardiac arrhythmias between April 2012
and  July  2012  underwent  simultaneous  ambulatory  ECG  recording  with  both  devices.  The  purpose  of  the  Barrett  study  was  to  determine  the  number  of
arrhythmia events and the percentage of patients in whom an arrhythmia was detected, known as “diagnostic yield,” during the comparative prescribed wear
periods. Our interpretation of the results of the Barrett study are that over the total wear period of each device, the Zio service detected 96 arrhythmia events
compared with 61 arrhythmia events by the Holter monitor (P < 0.001) providing a 57% improvement in diagnostic yield. An increase in diagnostic yield
provides increased data for the prescribing physician to use when making a diagnosis. In addition, we interpreted survey results to show that 94% of patients
found the Zio XT monitor comfortable to wear, whereas only 52% patients found the Holter monitor comfortable to wear. Of the 102 physicians surveyed,
from our review, we concluded that 90% thought a definitive diagnosis was achieved using data from the Zio service, as opposed to 64% using data from the
24-hour Holter monitor. This clinical trial, however, was a single center study with a relatively small sample size which did not compare the Zio service with
any product except the Holter monitor.

A  prospective,  randomized  study  by  Eysenck  et  al,  published  in  the  Journal  of  Interventional  Cardiac  Electrophysiology  in  February  2019,
compared the accuracy of AF burden detection across four different categories of external cardiac monitors ("ECMs") to implanted pacemakers ("PPM"), the
‘gold standard’ of rhythm monitoring. The study enrolled 21 patients previously implanted with a PPM, each acting as their own control subject, who wore
every ECM, including Zio XT, for two weeks in randomized order. Zio XT had an R-squared assessment of fit value of 0.99 compared to the PPM. Zio XT
was the only monitor to detect 100% of clinically relevant AF, outperforming the other ECM monitors in the study.

Changing Clinical Management for AF

In the Rosenberg Study, a prospective single center study of 74 patients undergoing management of AF, patients received both the Zio XT monitor
and a 24-hour Holter monitor simultaneously to determine the pattern of AF, to document a response to therapy and to potentially diagnose other arrhythmias.
From  our  review,  we  concluded  that  the  Zio  service  identified  AF  events  in  24%  more  patients  (18  patients)  than  Holter  monitors  (P  <  0.0001)  and  the
diagnosed pattern of AF was changed in 28% of patients (21 patients) after Zio service monitoring.

Based on our review of the study, we concluded that 28% of patients (21 patients) had a change in their clinical management. The most common
changes  included  a  change  in  antiarrhythmic  medication,  initiation  or  discontinuation  of  anticoagulation  medication,  recommendation  of  pacemaker
placement,  atrioventricular  junction  ablation,  pulmonary  vein  isolation  procedure  and  cardioversion.  This  clinical  trial,  however,  was  also  a  single  center
study with a relatively small sample size which did not compare the Zio service with any product except the Holter monitor.

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AF Burden as a Predictor of Stroke Risk

The KP-RHYTHM Study, a retrospective study of 1,965 Kaiser Permanente patients with paroxysmal AF who were monitored with the Zio service
between October 2011 and October 2016, examined the independent association between AF burden, which is the amount of time that a patient spends in AF
during the monitoring period as measured by the Zio service, and the risk of ischemic stroke. The findings were derived by linking detailed clinical outcome
data from Kaiser Permanente’s electronic medical records with our database of analyzed ECG recordings. We interpreted the study results to show that an AF
burden of more than 11% of the total time their heart rhythm was monitored was found to be associated with a three-fold increase in stroke risk, independent
of other known risk factors in patients who were not taking medication to prevent blood clots. We concluded that these results suggest that information on AF
burden, which is measured by the Zio service, may help patients and providers better evaluate treatment options for reducing risk of stroke. This clinical study
was limited to Kaiser Permanente’s patients from the Northern and Southern California regions.

Monitoring of Asymptomatic AF in High Risk Patients

Currently,  the  Zio  service  is  prescribed  by  physicians  primarily  for  symptomatic  patients.  However,  the  NSA  estimates  that  one-third  of  the  AF
population suffers from asymptomatic, or silent, AF. We see a future opportunity in proactively monitoring the approximately ten million patients who are at
high risk of asymptomatic AF to identify those with the illness.

STUDY-AF was a single-center, single-arm prospective study by Turakhia et al published in Clinical Cardiology in May 2015 that enrolled 75 high-
risk but previously undiagnosed AF patients from May 2012 to August 2013. Patients were 55 years of age or older and considered high risk with two or
more of the following risk factors: coronary disease, heart failure, hypertension, diabetes or sleep apnea, but had no prior documented AF or history of blood
clots  causing  blockage  in  blood  vessels.  We  interpreted  the  results  to  show  that  long-term  continuous  monitoring  with  the  Zio  service  identified  11%  of
patients with previously undiagnosed AF or atrial tachycardia, a rapid heartbeat where electrical signals initiate abnormally in the upper chamber of the heart.
We concluded from our review that in patients with AF, 75% of patients experienced the longest AF episode after the first 48 hours of monitoring and there
was  also  a  high  prevalence  of  asymptomatic  atrial  tachycardia  and  frequent  supraventricular  ectopic  complexes  identified,  which  may  be  relevant  to
development of AF or stroke. This clinical trial, however, was also a single center study with a relatively small sample size.

The  mHealth  Screening  to  Prevent  Strokes,  or  mSToPS  study,  published  in  the  Journal  of  the  American  Medical  Association  in  July  2018,  in
collaboration with Janssen Scientific Affairs, LLC, utilized a web-based platform to remotely recruit from 5,214 eligible patients from the Aetna Commercial
Fully Insured and Medicare Advantage programs. Women over the age of 65 and men over 55 with certain risk factors were selected to participate based on
information derived from claims data that placed them at a potentially increased risk of undiagnosed asymptomatic AF. We interpreted the results to show that
at one-year, AF was newly diagnosed in 6.7 percent of patients who were actively monitored by the Zio service versus 2.6 percent in the observational control
group receiving routine care. In addition to this primary endpoint to evaluate the difference in new AF diagnoses, clinical outcome data will be reported when
the planned three year follow-up is complete.

An additional study underway examining early detection of AF using the Zio service in high risk patients is the Home-based Screening for Early
Detection  of  AF,  or  SCREEN-AF.  This  study  is  screening  approximately  800  patients  older  than  75  years  with  hypertension.  Started  in  April  2015,  the
intervention group will undergo ambulatory screening for AF for two weeks with the Zio service utilized at baseline and again at three months, in addition to
standard care for six months.

In  November  2019,  we  announced  our  participation  in  a  new,  randomized,  controlled  study,  GUARD-AF  (Reducing  stroke  by  screening  for
undiagnosed atrial fibrillation in elderly individuals), sponsored by the Bristol-Myers Squibb-Pfizer Alliance. The study seeks to determine if earlier detection
of  AF  through  screening  in  previously  undiagnosed  men  and  women  ultimately  impacts  the  rate  of  stroke,  compared  to  usual  standard  medical  care.  The
screening arm will utilize the Zio XT service. The GUARD-AF study population (n=52,000) will include men and women at least 70 years of age visiting
their primary care physician for usual follow-up care. The primary outcome measures will be stroke and bleeding events leading to hospitalization. The trial
will identify outcome events using insurance claims from a healthcare claims database which, although subject to certain limitations, is expected to provide
evidence on health outcomes associated with AF detection intervention that may help inform future guidelines.

Research and Development

Our research and development activities are focused on:

•

Improvements and extensions to existing products and services. We are continuously working to improve the Zio service to increase
patient comfort, product quality, operational scalability and security

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•

•

•

•

•

Advancing our technology offering. Our product pipeline includes patch-based solutions that combine continuous monitoring for extended
periods with accelerated notification of significant events through mobile transmission capabilities

Customer workflow optimization. We have initiatives that aim to increase customer productivity by optimizing workflow through easier
patient enrollment, report access and interpretation, and integration of Zio reports directly into electronic health records

Data analytics. We are focused on improving and enhancing our backend deep-learned analytic platform, building on our core competency
in data analytics

Developing clinical evidence. We are involved in clinical studies to further support the benefits of the Zio service and expand indications
for use

Continuing to solidify our footprint in digital healthcare. Using our repository of ambulatory ECG patient data, we will continue to look
for ways to create value-driving opportunities in digital healthcare, such as expansion of indications for the Zio service, new therapeutic
discoveries, development of an analytical engine for ambulatory consumer and other medical data and payor and provider decision support

Our  research  and  development  activities  consist  of  software  development,  algorithm  and  product  development,  regulatory  affairs,  and  clinical
research. Our research and development expense was $37.3 million, $20.9 million and $13.3 million for the years ended December 31, 2019, 2018 and 2017,
respectively.

Sales and Marketing

We market our ambulatory cardiac monitoring solution in the United States through a direct sales organization comprised of sales management, field
billing specialists, quota-carrying sales representatives, and a customer experience team. As of December 31, 2019 we had 139 sales representatives on a full-
time equivalent basis, compared to 112 in 2018, and 86 in 2017. Our sales representatives focus on initial introduction into new accounts, penetration across a
sales  region,  driving  adoption  within  existing  accounts  and  conveying  our  message  of  clinical  and  economic  value  to  service  line  managers,  hospital
administrators, and other clinical departments. We continue to increase the size of our U.S. sales organization to expand the current customer account base
and increase utilization of our Zio service. In addition, we will continue exploring sales and marketing expansion opportunities in international geographies.

We market our Zio service to a variety of physician specialties including general cardiologists, electrophysiologists, neurologists, and other physician
specialists who diagnose and manage care for patients with arrhythmias. We have found success focusing on IDNs, in which large networks of facilities and
providers work together to offer a continuum of care to a specific geographic area or market. Focusing on sales to IDNs gives us the opportunity to conduct a
holistic sale for health systems interested in making value-based purchasing decisions.

Competition

We operate in a highly competitive and fragmented industry, subject to rapid change and significantly affected by new product introductions, results
of clinical research, corporate combinations and other factors. Large competitors in the ambulatory cardiac market include companies that sell standard Holter
monitors  including  GE  Healthcare,  Philips  Healthcare,  Mortara  Instrument,  Inc.,  Spacelabs  Healthcare  Inc.  and  Welch  Allyn  Holdings,  Inc.,  which  was
acquired by Hill-Rom Holdings, Inc. Additional competitors, such as BioTelemetry, Inc. and Preventice Solutions, Inc., offer ambulatory cardiac monitoring
services and also function as service providers.

These  competitors  have  also  developed  patch-based  cardiac  monitors  that  have  received  FDA  and  foreign  regulatory  clearances  such  as
BioTelemetry’s ePatch and MCOT Patch. We are also aware of some small start-up companies entering the patch-based cardiac monitoring market. Large
medical device companies may continue to acquire or form alliances with these smaller companies in order to diversify their product offering and participate
in  the  digital  health  space.  Many  of  our  competitors  have  substantially  greater  financial,  manufacturing,  marketing  and  technical  resources  than  we  do.
Furthermore, many of our competitors have well-established brands, widespread distribution channels, broader product offerings and an established customer
base.

We believe the principal competitive factors in our market include:

•

•

ease of use, comfort and unobtrusiveness of the device for the patient;

quality and clinical validation of the deep-learned algorithms used to detect arrhythmias;

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•

•

•

•

•

•

•

•

•

•

concise and comprehensive reports supporting efficient physician interpretation;

ease of use of service workflow for physicians and supporting clinicians;

contracted rates with third-party payors;

government reimbursement rates associated with our products and services;

quality of clinical data and publications in peer-reviewed journals;

size, experience, knowledge and training of sales and marketing teams;

availability and reliability of sales representatives and customer support services;

workflow protocols for solution implementation in existing care pathways;

reputation of existing device manufacturers and service providers; and

relationships with physicians, hospitals, administrators, and other third-party payors.

Intellectual Property

To  protect  our  proprietary  rights,  we  rely  on  a  combination  of  trademark,  copyright,  patent,  trade  secret  and  other  intellectual  property  laws,
employment,  confidentiality  and  invention  assignment  agreements  and  protective  contractual  provisions  with  our  employees,  contractors,  consultants,
suppliers, partners and other third parties.

As of December 31, 2019 we owned, or retained an exclusive license to, seventeen issued patents from the U.S. Patent Office, six issued patents
from  the  Japanese  Patent  Office,  two  issued  patents  from  each  of  the  Australian,  Canadian  and  European  Patent  Offices,  and  one  issued  patent  from  the
Korean Patent Office:

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Country
USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

USA

Japan

Japan

Japan

Japan

Japan

Japan

Australia

Australia

Canada

Canada

Korea

European

European

Pat. No.
8,150,502 

8,160,682 

8,244,335 

8,538,503 

8,560,046 

9,173,670 

9,241,649 

9,451,975 

9,597,004 

9,955,887 

10,098,559 

10,271,754 

10,299,691 

D852965 

D854167 

10,405,799 

10,517,500 

5,203,973 

5,559,425 

6,198,849 

6,336,640 

6,491,826 

6,495,228 

2,011,252,998 

2,014,209,376 

2,651,203 

2,797,980 

10-1513288

EP1981402

EP2568878

Issue Date
4/3/2012

4/17/2012

8/14/2012

9/17/2013

10/15/2013

11/3/2015

1/26/2016

9/27/2016

3/21/2017

5/1/2018

10/16/2018

4/30/2019

5/28/2019

7/2/2019

7/16/2019

9/10/2019

12/31/2019

2/22/2013

6/13/2014

9/1/2017

5/11/2018

3/8/2019

3/15/2019

12/10/2015

6/29/2017

9/19/2017

8/18/2015

4/13/2015

8/10/2016

7/25/2018

Expiration Date
11/20/2028

2/3/2029

1/21/2029

5/12/2031

6/2/2031

4/7/2034

10/19/2031

4/7/2034

10/30/2035

10/30/2035

10/30/2035

1/23/2034

10/20/2035

7/2/2034

7/16/2034

4/10/2033

5/12/2031

2/6/2027

5/12/2031

1/23/2034

1/23/2034

5/12/2031

5/12/2031

5/12/2031

1/23/2034

2/6/2027

5/12/2031

5/12/2031

2/6/2027

5/12/2031

As of December 31, 2019, we had nineteen pending patent applications globally, including three in the United States, five in the European Patent

Office, four in Japan, two in each of Korea and Canada, and one in each of Australia, China and India.

As of December 31, 2019, our trademark portfolio contained a U.S. trademark registration for the mark My ZIO, ZIO and a pending U.S. application
for Zio AT.  It also contained registered trademarks for the mark IRHYTHM in Australia and the European Union and pending applications for that mark in
Australia, Austria, Canada, China, Denmark, Finland, France, Germany, Japan, Norway, Sweden, Switzerland, United Kingdom and United States. It further
contained  pending  applications  for  the  mark  ZIO  in  Australia,  Canada,  China,  Japan,  Norway  and  Switzerland  and  a  registered  trademark  for  ZIO  in  the
European Union.

We also seek to maintain certain intellectual property and proprietary know-how as trade secrets, and generally require our partners to execute non-
disclosure  agreements  prior  to  any  substantive  discussions  or  disclosures  of  our  technology  or  business  plans.  Our  trade  secrets  include  proprietary
algorithms, adhesive formulations, workflow tools and operational processes.

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Manufacturing and Supply

We manufacture our ambulatory cardiac monitors, Zio XT and Zio AT, in our leased facilities in Cypress, California. This 14,616 square foot facility
provides  space  for  our  assembly  and  production  operations,  including  packaging,  storage  and  shipping.  We  believe  our  manufacturing  facilities  will  be
sufficient to meet our manufacturing needs for at least the next two years.

Our manufacturing operations are subject to regulatory requirements of the FDA’s Quality System Regulation (“QSR”) for medical devices sold in
the United States, set forth at 21 CFR part 820, and the Medical Devices Directive 93/42/EEC (“MDD”), which is required for doing business in the European
Union  (“EU”).  We  are  also  subject  to  applicable  requirements  relating  to  the  environment,  waste  management  and  health  and  safety  matters,  including
measures relating to the release, use, storage, treatment, transportation, discharge, disposal, sale, labeling, collection, recycling, treatment and remediation of
hazardous substances. The FDA enforces the QSR through periodic unannounced inspections that may include our manufacturing facilities or those of our
suppliers.  Our  EU  Notified  Body,  the  National  Standard  Authority  of  Ireland  (“NSAI”),  enforces  the  MDD  through  both  scheduled  and  unscheduled
inspections of our manufacturing facilities.

Our failure or the failure of our suppliers to maintain compliance with either the QSR or MDD requirements could result in the shutdown of our
manufacturing operations or the recall of our products, which would harm our business. In the event that one of our suppliers fails to maintain compliance
with our or governmental quality requirements, we may have to qualify a new supplier and could experience manufacturing delays as a result.

Our quality control management programs have earned us a number of quality-related designations. Our Cypress, California manufacturing facilities,
have received EN ISO 13485:2012 certification. The NSAI most recently conducted an ISO 13485 recertification audit in 2017, and ISO certification was
received. We have been an FDA-registered medical device manufacturer since 2008 and have been a California-licensed medical device manufacturer since
2009. The most recent FDA audit of our manufacturing facility occurred in October 2018, and no formal observations resulted. No additional follow up with
the FDA was required and we believe that we are in substantial compliance with the QSR.

Circuit board components of the Zio XT and Zio AT monitors are provided by contract electronic manufacturers, Kimball Electronics, Inc., and Veris
Manufacturing, Inc. We have manufacturing service agreements with both providers that allow either party to terminate the agreement with 90 days prior
written  notice.  There  are  a  number  of  additional  critical  components  and  sub-assemblies  sourced  by  other  vendors.  The  vendors  for  these  materials  are
qualified through stringent evaluation and testing of their performance. We implement a strict no-change policy with our contract manufacturers to ensure that
no components are changed without our approval. Our production group in Cypress, California performs inspection, assembly, testing and product release.

Order quantities and lead times for components purchased from suppliers are based on our forecasts derived from historical demand and anticipated
future  demand.  Lead  times  for  components  may  vary  significantly  depending  on  the  size  of  the  order,  time  required  to  fabricate  and  test  the  components,
specific supplier requirements and current market demand for the components and subassemblies. To date, we have not experienced unmanageable delays in
obtaining any of our components or subassemblies.

Government Regulation

United States Food & Drug Administration (FDA)

The Zio XT and Zio AT monitors are considered medical devices subject to extensive and ongoing regulation by the FDA under the Federal Food,
Drug, and Cosmetic Act (“FD&C Act”) and its implementing regulations, as well as other federal and state regulatory bodies in the United States. The laws
and regulations govern, among other things, product design and development, pre-clinical and clinical testing, manufacturing, packaging, labeling, storage,
recordkeeping and reporting, clearance or approval, marketing, distribution, promotion, import and export, and post-marketing surveillance.

The FDA regulates the medical device market to ensure the safety and efficacy of these products. The FDA allows for two primary pathways for a
medical device to gain approval for commercialization: a successful premarket approval (“PMA”), application or 510(k) clearance pursuant to Section 510(k)
of the FD&C Act. A novel product must go through the more rigorous PMA process if it cannot receive authorization through a 510(k) clearance. FDA has
established three different classes of medical devices that indicate the level of risk associated with using a device and the consequent degree of regulatory
controls needed to govern its safety and efficacy. Most Class I devices are exempt from 510(k) requirements. Most Class II devices, including the Zio XT and
Zio AT monitors, and the Zio ECG Utilization Service System, or the ZEUS System, require 510(k) clearance from the FDA in order to be marketed in the
United States. A 510(k) submission must demonstrate that the device is

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substantially equivalent to a device legally in commercial distribution in the United States: (1) before May 28, 1976; or (2) to another device that has been
cleared through the 510(k) process and determined by FDA to be substantially equivalent. To be substantially equivalent, the proposed device must have the
same  intended  use  as  the  predicate  device  and  either  have  the  same  technological  characteristics  as  the  predicate  device  or  have  different  technological
characteristics and not raise different questions of safety or effectiveness than the predicate device. Clinical data is sometimes required to support substantial
equivalence. In some instances, data from human clinical trials must also be submitted in support of a 510(k) submission. If so, this data must be collected in
a manner that conforms with specific requirements in federal regulations. Most Class III devices are high-risk devices that pose a significant risk of illness or
injury or devices found not to be substantially equivalent to Class I and II predicate devices through the 510(k) process and require PMA. The PMA process
for Class III devices is more involved and includes the submission of clinical data to support claims made for the device.

The Zio XT and Zio AT monitors maintain FDA 510(k) clearance as Class II devices, with each new generation of a device receiving individual
clearance. In addition, the ZEUS System originally received FDA 510(k) clearance in 2009 as a Class II device. The ZEUS System is the combination of
proprietary  algorithms  and  software  tools  that  our  certified  cardiac  technicians  utilize  to  curate  the  ECG  data  and  create  the  Zio  Report  electronically.
Significant modifications made to the ZEUS System since its original clearance have been regularly evaluated by the FDA, the most recent update receiving
510(k) clearance in August 2018.

Pervasive and Continuing Regulation

After a device is placed on the market, numerous regulatory requirements continue to apply. These include:

•

•

•

•

•

the FDA’s QSR, which requires manufacturers, including their suppliers, to follow stringent design, testing, control, documentation and
other quality assurance procedures during all aspects of the manufacturing process

labeling regulations and FDA prohibitions against the promotion of products for un-cleared, unapproved or off-label uses

medical device reporting (“MDR”) regulations, which require that manufacturers report to the FDA if their device may have caused or
contributed to a death or serious injury or malfunctioned in a way that would likely cause or contribute to a death or serious injury if the
malfunction were to recur

medical device recalls, which require that manufacturers report to the FDA any recall of a medical device, provided the recall was initiated
to either reduce a risk to health posed by the device, or to remedy a violation of the FD&C Act caused by the device that may present a risk
to health

post-market surveillance regulations, which apply when necessary to protect the public health or to provide additional safety and
effectiveness data for the device

After a device receives 510(k) clearance or PMA approval, any modification that could significantly affect its safety or effectiveness, or that would
constitute  a  major  change  in  its  intended  use,  will  require  a  new  clearance  or  approval.  The  FDA  requires  each  manufacturer  to  make  this  determination
initially, but the FDA can review any such decision and can disagree with a manufacturer’s determination. If the FDA disagrees with the determination not to
seek  a  new  510(k)  clearance  or  PMA,  the  FDA  may  retroactively  require  a  new  510(k)  clearance  or  premarket  approval.  The  FDA  could  also  require  a
manufacturer to cease marketing and distribution and/or recall the modified device until 510(k) clearance or premarket approval is obtained. Also, in these
circumstances, the manufacturer may be subject to significant regulatory fines, penalties, and warning letters.

We have registered with the FDA as a medical device manufacturer and have obtained a manufacturing license from the California Department of
Public Health, or CDPH. The FDA and CDPH have broad post-market and regulatory enforcement powers. We are subject to unannounced inspections by the
FDA  and  the  Food  and  Drug  Branch  of  CDPH  to  determine  our  compliance  with  the  QSR  and  other  regulations,  and  these  inspections  may  include  the
manufacturing facilities of our suppliers. Additionally, NSAI regularly inspects our manufacturing, design and operational facilities to ensure ongoing ISO
13485 compliance and periodically reviews technical design files in accordance with the Medical Device Directive in order to maintain our CE mark.

Failure to comply with applicable regulatory requirements can result in enforcement action by the FDA, which may include any of the following

sanctions:

•

•

warning letters, fines, injunctions, consent decrees and civil penalties

repair, replacement, refunds, recall or seizure of our products

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•

•

•

•

European Union

operating restrictions, partial suspension or total shutdown of production

refusing our requests for 510(k) clearance or premarket approval of new products, new intended uses or modifications to existing products

withdrawing 510(k) clearance or premarket approvals that have already been granted

criminal prosecution

The Zio XT monitor is currently regulated in the European Union as a medical device per the European Union Directive 93/42/EEC, also known as
the Medical Device Directive (“MDD”). The MDD sets out the basic regulatory framework for medical devices in the European Union. In May 2020, the
MDR, a more comprehensive regulatory framework, will replace the MDD.

The system of regulating medical devices operates by way of a certification for each medical device. Each certified device is marked with the CE
mark which shows that the device has a Certificat de Conformité. There are national bodies known as Competent Authorities in each member state which
oversee the implementation of the MDD within their jurisdiction. The means for achieving the requirements for the CE mark vary according to the nature of
the device. Devices are classified in accordance with their perceived risks, similarly to the U.S. system. The class of a product determines the conformity
assessment required before the CE mark can be placed on a product. Conformity assessments for our products are carried out as required by the MDD. Each
member state can appoint Notified Bodies within its jurisdiction. If a Notified Body of one member state has issued a Certificat de Conformité, the device can
be sold throughout the European Union without further conformance tests being required in other member states. The CE mark is contingent upon continued
compliance with the applicable regulations and the quality system requirements of the ISO 13485 standard. Our current CE mark for Zio XT is issued by the
National Standards Authority of Ireland, or NSAI.

Health Insurance Portability and Accountability Act

The  Health  Insurance  Portability  and  Accountability  Act  of  1996  (“HIPAA”),  established  comprehensive  federal  protection  for  the  privacy  and
security  of  health  information.  Under  HIPAA,  the  Department  of  Health  and  Human  Services  (“HHS”),  has  issued  regulations  to  protect  the  privacy  and
security  of  protected  health  information  used  or  disclosed  by  Covered  Entities,  including  healthcare  providers,  such  as  us.  HIPAA  also  regulates
standardization  of  data  content,  codes  and  formats  used  in  healthcare  transactions  and  standardization  of  identifiers  for  health  plans  and  providers.  The
privacy regulations protect medical records and other protected health information by limiting their use and release, giving patients the right to access their
medical  records  and  limiting  most  disclosures  of  health  information  to  the  minimum  amount  necessary  to  accomplish  an  intended  purpose.  The  HIPAA
security  standards  require  the  adoption  of  administrative,  physical,  and  technical  safeguards  and  the  adoption  of  written  security  policies  and  procedures.
HIPAA  requires  Covered  Entities  to  execute  Business  Associate  Agreements  with  individuals  and  organizations,  or  Business  Associates,  who  provide
services  to  Covered  Entities  and  who  need  access  to  protected  health  information.  We  are  a  Covered  Entity  and  a  provider  under  HIPAA  and  subject  to
HIPAA regulations.

In 2009, Congress enacted Subtitle D of the Health Information Technology for Economic and Clinical Health Act (“HITECH”). HITECH amends
HIPAA  and,  among  other  things,  creates  new  targets  for  enforcement,  imposes  new  penalties  for  noncompliance  and  establishes  new  breach  notification
requirements for Covered Entities and Business Associates.

Under  HITECH’s  breach  notification  requirements,  Covered  Entities  must  report  breaches  of  protected  health  information  that  has  not  been
encrypted or otherwise secured in accordance with guidance from HHS. Required breach notices must be made as soon as is reasonably practicable, but no
later than 60 days following discovery of the breach. Reports must be made to affected individuals and to HHS, and in some cases they must be reported
through local and national media, depending on the size of the breach. We are subject to audit under HHS’s HITECH-mandated audit program. We may also
be audited in connection with a privacy complaint. We are subject to prosecution and/or administrative enforcement and increased civil and criminal penalties
for non-compliance, including a new, four-tiered system of monetary penalties adopted under HITECH. We are also subject to enforcement by state attorneys
general who were given authority to enforce HIPAA under HITECH. To avoid penalties under the HITECH breach notification provisions, we must ensure
that  breaches  of  protected  health  information  are  promptly  detected  and  reported  within  the  company,  so  that  we  can  make  all  required  notifications  on  a
timely basis. However, even if we make required reports on a timely basis, we may still be subject to penalties for the underlying breach.

In addition to the federal privacy regulations, there are a number of state laws regarding the privacy and security of health information and personal

data that apply to us. The compliance requirements of these laws, including additional breach

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reporting requirements, and the penalties for violation vary widely, and new privacy and security laws in this area are evolving. Requirements of these laws
and penalties for violations vary widely.

If we or our operations are found to be in violation of HIPAA, HITECH, or their implementing regulations, we may be subject to penalties, including
civil  and  criminal  penalties,  fines,  and  exclusion  from  participation  in  federal  or  state  healthcare  programs,  and  the  curtailment  or  restructuring  of  our
operations. HITECH increased the civil and criminal penalties that may be imposed against Covered Entities, their Business Associates and possibly other
persons, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and
seek attorney’s fees and costs associated with pursuing federal civil actions.

Federal, State and Foreign Fraud and Abuse Laws

Because of the significant federal funding involved in CMS programs such as Medicare and Medicaid, Congress and the states have enacted, and
actively enforce, a number of laws to eliminate fraud and abuse in federal healthcare programs. Our business is subject to compliance with these laws. In
March 2010, the Patient Protection and Affordable Care Act, as amended by the Healthcare and Education Affordability Reconciliation Act, which we refer
to  collectively  as  the  Affordable  Care  Act,  was  enacted  in  the  United  States.  The  Affordable  Care  Act  expands  the  government’s  investigative  and
enforcement authority and increases the penalties for fraud and abuse, including amendments to both the Anti-Kickback Statute and the False Claims Act, to
make it easier to bring suit under these statutes. The Affordable Care Act also allocates additional resources and tools for the government to police healthcare
fraud, with expanded subpoena power for HHS, additional funding to investigate fraud and abuse across the healthcare system and expanded use of recovery
audit contractors for enforcement.

Anti-Kickback Statute

The federal Anti-Kickback Statute prohibits persons from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly
or indirectly, in exchange for or to induce either the referral of an individual, or the furnishing or arranging for a good or service, for which payment may be
made under a federal healthcare program, such as Medicare or Medicaid.

The  definition  of  “remuneration”  has  been  broadly  interpreted  to  include  anything  of  value,  including,  for  example,  gifts,  certain  discounts,  the
furnishing of free supplies, equipment or services, credit arrangements, payment of cash and waivers of payments. Several courts have interpreted the statute’s
intent requirement to mean that if any one purpose of an arrangement involving remuneration is to induce referrals of federal healthcare covered businesses,
the statute has been violated. Penalties for violations include criminal penalties and civil sanctions such as fines, imprisonment and possible exclusion from
Medicare, Medicaid and other federal healthcare programs. In addition, some kickback allegations have been claimed to violate the federal False Claims Act.

The Anti-Kickback Statute is broad and prohibits many arrangements and practices that are otherwise lawful in businesses outside of the healthcare
industry. Recognizing that the Anti- Kickback Statute is broad and may technically prohibit many innocuous or beneficial arrangements, Congress authorized
the Office of Inspector General (“OIG”) of the HHS to issue a series of regulations known as “safe harbors.” These safe harbors set forth provisions that, if all
their applicable requirements are met, will assure healthcare providers and other parties that they will not be prosecuted under the Anti-Kickback Statute. The
failure of a transaction or arrangement to fit precisely within one or more safe harbors does not necessarily mean that it is illegal or that prosecution will be
pursued.  However,  conduct  and  business  arrangements  that  do  not  fully  satisfy  an  applicable  safe  harbor  may  result  in  increased  scrutiny  by  government
enforcement authorities such as OIG.

Many states have adopted laws similar to the Anti-Kickback Statute. Some of these state prohibitions apply to referral of recipients for healthcare

products or services reimbursed by any source, not only CMS programs.

Government  officials  have  focused  their  enforcement  efforts  on  the  marketing  of  healthcare  services  and  products,  among  other  activities,  and
recently have brought cases against companies, and certain individual sales, marketing and executive personnel, for allegedly offering unlawful inducements
to potential or existing customers in an attempt to procure their business.

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Federal False Claims Act

Another development affecting the healthcare industry is the increased use of the federal False Claims Act (“FCA”) and in particular, action brought
pursuant to the FCA’s “whistleblower” or “ qui tam ” provisions. The FCA imposes liability on any person or entity that, among other things, knowingly
presents,  or  causes  to  be  presented,  a  false  or  fraudulent  claim  for  payment  by  a  federal  healthcare  program.  The  qui tam  provisions  of  the  FCA  allow  a
private  individual  to  bring  actions  on  behalf  of  the  federal  government  alleging  that  the  defendant  has  violated  the  FCA  and  to  share  in  any  monetary
recovery. As a result, in recent years, the number of suits brought against healthcare providers by private individuals has increased dramatically. In addition,
various states have enacted false claims laws analogous to the FCA, and many of these state laws apply where a claim is submitted to any third-party payor
and not only a federal healthcare program.

When an entity is determined to have violated the FCA, it may be required to pay up to three times the actual damages sustained by the government,
plus civil penalties of between approximately $11,000 and $22,000 for each separate instance of false claim. As part of any settlement, the government will
usually require the entity to enter into a corporate integrity agreement, which imposes certain compliance, certification and reporting obligations. There are
many potential bases for liability under the FCA. Liability arises, primarily, when an entity knowingly submits, or causes another to submit, a false claim for
reimbursement to the federal government. The federal government has used the FCA to assert liability on the basis of inadequate care, kickbacks and other
improper  referrals,  and  improper  use  of  CMS  billing  numbers,  in  addition  to  the  more  predictable  allegations  of  misrepresentations  with  respect  to  the
services  rendered.  In  addition,  the  federal  government  has  prosecuted  companies  under  the  FCA  in  connection  with  off-label  promotion  of  products.
Activities  relating  to  the  reporting  of  discount  and  rebate  information  and  other  information  affecting  federal,  state  and  third-party  reimbursement  of  our
products and services and the sale and marketing of our products and services may be subject to scrutiny under these laws.

While we are unaware of any current matters, we are unable to predict whether we will be subject to actions under the FCA or a similar state law, or
the  impact  of  such  actions.  However,  the  costs  of  defending  such  claims,  as  well  as  any  sanctions  imposed,  could  significantly  affect  our  financial
performance.

Open Payments

The Physician Payment Sunshine Act, known as “Open Payments” and enacted as part of the Affordable Care Act, requires all pharmaceutical and
medical  device  manufacturers  of  products  covered  by  Medicare,  Medicaid  or  the  Children’s  Health  Insurance  Program  to  report  annually  to  HHS:
(i) payments and transfers of value to teaching hospitals and licensed physicians, (ii) physician ownership in the manufacturer, and (iii) research payments.
The payments required to be reported include the cost of meals provided to a physician, travel reimbursements and other transfers of value, including those
provided as part of contracted services such as speaker programs, advisory boards, consultation services and clinical trial services. The statute requires the
federal  government  to  make  reported  information  available  to  the  public.  Failure  to  comply  with  the  reporting  requirements  can  result  in  significant  civil
monetary penalties ranging from $1,000 to $10,000 for each payment or other transfer of value that is not reported (up to a maximum per annual report of
$150,000) and from $10,000 to $100,000 for each knowing failure to report (up to a maximum per annual report of $1.0 million). We are subject to Open
Payments  and  the  information  we  disclose  may  lead  to  greater  scrutiny,  which  may  result  in  modifications  to  established  practices  and  additional  costs.
Additionally, similar reporting requirements have also been enacted on the state level domestically, and an increasing number of countries worldwide either
have adopted or are considering similar laws requiring transparency of interactions with healthcare professionals.

Foreign Corrupt Practices Act

The Foreign Corrupt Practices Act (“FCPA”) prohibits any U.S. individual or business from paying, offering, or authorizing payment or offering of
anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing any act or decision of the foreign
entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the
United  States  to  comply  with  accounting  provisions  requiring  us  to  maintain  books  and  records  that  accurately  and  fairly  reflect  all  transactions  of  the
corporation,  including  international  subsidiaries,  if  any,  and  to  devise  and  maintain  an  adequate  system  of  internal  accounting  controls  for  international
operations.

International Laws

In Europe, various countries have adopted anti-bribery laws providing for severe consequences in the form of criminal penalties and significant fines
for  individuals  or  companies  committing  a  bribery  offense.  Violations  of  these  anti-bribery  laws,  or  allegations  of  such  violations,  could  have  a  negative
impact on our business, results of operations and reputation.

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For instance, in the United Kingdom, under the U.K. Bribery Act 2010, a bribery occurs when a person offers, gives or promises to give a financial
or other advantage to induce or reward another individual to improperly perform certain functions or activities, including any function of a public nature.
Bribery of foreign public officials also falls within the scope of the U.K. Bribery Act 2010. An individual found in violation of the U.K. Bribery Act 2010,
faces imprisonment of up to 10 years. In addition, the individual can be subject to an unlimited fine, as can commercial organizations for failure to prevent
bribery.

There  are  also  international  privacy  laws  that  impose  restrictions  on  the  access,  use,  and  disclosure  of  health  information.  All  of  these  laws  may
impact  our  business.  Our  failure  to  comply  with  these  privacy  laws  or  significant  changes  in  the  laws  restricting  our  ability  to  obtain  required  patient
information could significantly impact our business and our future business plans.

U.S. Centers for Medicare and Medicaid Services (CMS)

Medicare is a federal program administered by CMS through fiscal intermediaries and carriers. Available to individuals age 65 or over, and certain
other  individuals,  the  Medicare  program  provides,  among  other  things,  healthcare  benefits  that  cover,  within  prescribed  limits,  the  major  costs  of  most
medically necessary care for such individuals, subject to certain deductibles and copayments.

CMS has established guidelines for the coverage and reimbursement of certain products, supplies and services. In general, in order to be reimbursed
by Medicare, a healthcare product or service furnished to a Medicare beneficiary must be reasonable and necessary for the diagnosis or treatment of an illness
or  injury,  or  to  improve  the  functioning  of  a  malformed  body  part.  The  methodology  for  determining  coverage  status  and  the  amount  of  Medicare
reimbursement varies based upon, among other factors, the setting in which a Medicare beneficiary received healthcare products and services. Any changes in
federal  legislation,  regulations  and  policy  affecting  Medicare  coverage  and  reimbursement  relative  to  our  Zio  service  could  have  a  material  effect  on  our
performance.

CMS also administers the Medicaid program, a cooperative federal/state program that provides medical assistance benefits to qualifying low income
and medically needy persons. State participation in Medicaid is optional, and each state is given discretion in developing and administering its own Medicaid
program, subject to certain federal requirements pertaining to payment levels, eligibility criteria and minimum categories of services. The coverage, method
and  level  of  reimbursement  varies  from  state  to  state  and  is  subject  to  each  state’s  budget  restraints.  Changes  to  the  coverage,  method  or  level  of
reimbursement for our Zio service may affect future revenue negatively if reimbursement amounts are decreased or discontinued.

All  CMS  programs  are  subject  to  statutory  and  regulatory  changes,  retroactive  and  prospective  rate  adjustments,  administrative  rulings,
interpretations  of  policy,  intermediary  determinations,  and  government  funding  restrictions,  all  of  which  may  materially  increase  or  decrease  the  rate  of
program payments to healthcare facilities and other healthcare providers, including those paid for our Zio service.

Our  facilities  in  Illinois,  California  and  Texas  are  enrolled  as  independent  diagnostic  testing  facilities  (“IDTFs”)  defined  by  CMS  as  entities
independent  of  a  hospital  or  physician’s  office  in  which  diagnostic  tests  are  performed  by  licensed  or  certified  non-physician  personnel  under  appropriate
physician supervision. CMS has set certain performance standards that every IDTF must meet in order to obtain or maintain its billing privileges.

United States Healthcare Reform

Changes in healthcare policy could increase our costs and subject us to additional regulatory requirements that may interrupt commercialization of
our current and future solutions. Changes in healthcare policy could increase our costs, decrease our revenue and impact sales of and reimbursement for our
current and future products and services. The Affordable Care Act (“ACA”) substantially changes the way healthcare is financed by both governmental and
private insurers, and significantly impacts our industry. The ACA contains a number of provisions that impact our business and operations, some of which in
ways we cannot currently predict, including those governing enrollment in federal healthcare programs and reimbursement changes.

The  current  presidential  administration  and  Congress  are  expected  to  attempt  to  make  sweeping  changes  to  the  current  health  care  laws.  It  is
uncertain how modification or repeal of any of the provisions of the ACA, including as a result of current and future executive orders and legislative actions,
will  impact  us  and  the  medical  device  industry  as  a  whole.  Any  changes  to,  or  repeal  of,  the  ACA  may  have  a  material  adverse  effect  on  our  results  of
operations. We cannot predict what other health care

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programs and regulations will ultimately be implemented at the federal or state level or the effect of any future legislation or regulation in the United States
may have on our business.

Employees

As  of  December  31,  2019,  we  had  997  full-time  employees.  None  of  our  employees  is  represented  by  a  labor  union  or  is  a  party  to  a  collective

bargaining agreement, and we believe that our employee relations are good.

Corporate and Other Information

We were incorporated in Delaware on September 14, 2006. Our principal executive offices are located at 699 8th Street, Suite 600, San Francisco,
CA 94103, and our telephone number is (415) 632-5700. Our website address is www.iRhythmTech.com. References to our website address do not constitute
incorporation by reference of the information contained on the website, and the information contained on, or accessible through, our website is not part of this
document.

We make available, free of charge on our corporate website, copies of our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current
Reports on Form 8-K, Proxy Statements, and all amendments to these reports, as soon as reasonably practicable after such material is electronically filed with
or furnished to the Securities and Exchange Commission pursuant to Section 13(a) or 15(d) of the Securities Exchange Act. We also show detail about stock
trading by corporate insiders by providing access to SEC Forms 3, 4 and 5. This information may also be obtained from the SEC's on-line database, which is
located at www.sec.gov. Our common stock is traded on the NASDAQ Stock Market under the symbol “IRTC.”

Item 1A. Risk Factors

Investing in our common stock involves a high degree of risk. You should carefully consider the risks and uncertainties described below, together with all of
the  other  information  contained  in  this  Annual  Report  on  Form  10-K,  including  our  financial  statements  and  the  related  notes  thereto,  before  making  a
decision to invest in our common stock. The realization of any of the following risks could materially and adversely affect our business, financial condition,
operating results and prospects. In that event, the price of our common stock could decline, and you could lose part or all of your investment

Risks Related to Our Business

We have a history of net losses, which we expect to continue, and we may not be able to achieve or sustain profitability in the future.

We have incurred net losses since our inception in September 2006. For the year ended December 31, 2019 and 2018, we had net losses of $54.6 million and
$50.4 million, respectively, and expect to continue to incur additional losses. As of December 31, 2019, we had an accumulated deficit of $260.4 million. The
losses and accumulated deficit were primarily due to the substantial investments we made to develop and improve our technology and products and improve
our  business  and  the  Zio  service  through  research  and  development  efforts  and  infrastructure  improvements.  Over  the  next  several  years,  we  expect  to
continue to devote substantially all of our resources to increase adoption of and reimbursement for our Zio service, which includes Zio XT and Zio AT, and to
develop additional arrhythmia detection and management products and services. These efforts may prove more expensive than we currently anticipate and we
may  not  succeed  in  increasing  our  revenue  sufficiently  to  offset  these  higher  expenses  or  at  all.  Accordingly,  we  cannot  assure  you  that  we  will  achieve
profitability in the future or that, if we do become profitable, we will sustain profitability. Our failure to achieve and sustain profitability in the future could
cause the market price of our common stock to decline.

Our business is dependent upon physicians adopting our Zio service and if we fail to obtain broad adoption, our business would be adversely affected.

Our success will depend on our ability to bring awareness to the Zio brand and educate physicians regarding the benefits of our Zio service over existing
products  and  services,  such  as  Holter  monitors  and  event  monitors,  and  to  persuade  them  to  prescribe  the  Zio  service  as  the  diagnostic  product  for  their
patients. We do not know if the Zio service will be successful over the long term and market acceptance may be hindered if physicians are not presented with
compelling  data  demonstrating  the  efficacy  of  our  service  compared  to  alternative  technologies.  Any  studies  we,  or  third  parties  which  we  sponsor,  may
conduct comparing our Zio service with alternative technologies will be expensive, time consuming and may not yield positive results. Additionally, adoption
will be directly influenced by a number of financial factors, including the ability of providers to obtain

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sufficient reimbursement from third-party commercial payors, and the Centers for Medicare & Medicaid Services (“CMS”), for the professional services they
provide in applying the Zio monitor and analyzing the Zio report. The efficacy, safety, performance and cost-effectiveness of our Zio service, on a stand-alone
basis and relative to competing services, will determine the availability and level of reimbursement received by us and providers. Some payors do not have
pricing contracts with us setting forth the Zio service reimbursement rates for us and providers. Physicians may be reluctant to prescribe the Zio service to
patients  covered  by  such  non-contracted  insurance  policies  because  of  the  uncertainty  surrounding  reimbursement  rates  and  the  administrative  burden  of
interfacing with patients to answer their questions and support their efforts to obtain adequate reimbursement for the Zio service. If physicians do not adopt
and prescribe our Zio service, our revenue will not increase and our financial condition will suffer as a result.

Our revenue relies substantially on the Zio service, which is currently our only product offering. If the Zio service or future product offerings fail to gain,
or lose, market acceptance, our business will suffer.

Our  current  revenue  is  dependent  on  prescriptions  of  the  Zio  service,  and  we  expect  that  sales  of  the  Zio  service  will  account  for  substantially  all  of  our
revenue for the foreseeable future. We are in various stages of research and development for other diagnostic solutions and new indications for our technology
and the Zio service; however, there can be no assurance that we will be able to successfully develop and commercialize any new products or services. Any
new products may not be accepted by physicians or may merely replace revenue generated by our Zio service and not generate additional revenue. If we have
difficulty launching new products, our reputation may be harmed and our financial results adversely affected. In order to substantially increase our revenue,
we will need to target physicians other than cardiologists, such as emergency room doctors, primary care physicians and other physicians with whom we have
had little contact and may require a different type of selling effort. If we are unable to increase prescriptions of the Zio service, expand reimbursement for the
Zio service, or successfully develop and commercialize new products and services, our revenue and our ability to achieve and sustain profitability would be
impaired.

Our quarterly and annual results may fluctuate significantly and may not fully reflect the underlying performance of our business.

Our quarterly and annual results of operations, including our revenue, profitability and cash flow, may vary significantly in the future and period-to-period
comparisons of our operating results may not be meaningful. Accordingly, the results of any one quarter or period should not be relied upon as an indication
of future performance. Our quarterly and annual financial results may fluctuate as a result of a variety of factors, many of which are outside our control and,
as  a  result,  may  not  fully  reflect  the  underlying  performance  of  our  business.  Fluctuation  in  quarterly  and  annual  results  may  decrease  the  value  of  our
common stock. Factors that may cause fluctuations in our quarterly and annual results include, without limitation:

• market awareness and acceptance of the Zio service;
•
•
•
•
•

our ability to get payors under contract at acceptable reimbursement rates;
the availability of reimbursement for the Zio service through government programs;
our ability to attract new customers and improve our business with existing customers;
results of our clinical trials and publication of studies by us, competitors or third parties;
the  timing  and  success  of  new  product  introductions  by  us  or  our  competitors  or  any  other  change  in  the  competitive  dynamics  of  our  industry,
including consolidation among competitors, customers or strategic partners;
the amount and timing of costs and expenses related to the maintenance and expansion of our business and operations;
changes in our pricing policies or those of our competitors;
general economic, industry and market conditions;
the regulatory environment;
expenses associated with unforeseen product quality issues;
timing of physician prescriptions and demand for our Zio service;
seasonality factors, such as patient and physician vacation schedules, severe weather conditions and insurance deductibles, that hamper or otherwise
restrict when a patient seeking diagnostic services such as the Zio service visits the prescribing physician;
the hiring, training and retention of key employees, including our ability to expand our sales team;
litigation or other claims against us for intellectual property infringement or otherwise;
our ability to obtain additional financing as necessary; and
advances and trends in new technologies and industry standards.

•
•
•
•
•
•
•

•
•
•
•

Because our quarterly results may fluctuate, period-to-period comparisons may not be the best indication of the underlying results of our business and should
only be relied upon as one factor in determining how our business is performing.

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We have noticed seasonality in the use of our Zio service which, along with other factors such as severe weather, may cause quarterly fluctuations in our
revenue.

During  the  summer  months  and  the  holiday  season,  we  have  observed  that  the  use  of  our  Zio  service  decreases,  which  reduces  our  revenue  during  those
periods. We believe that the decrease in demand may result from physicians or their patients taking vacations. Severe weather conditions or natural disasters
also may hamper or otherwise restrict when patients seeking diagnostic services, such as the Zio service, visit prescribing physicians. Similarly, we generally
experience some effects of seasonality due to the renewal of insurance deductibles at the beginning of the calendar year. These factors may cause our results
of operations to vary from quarter to quarter.

Reimbursement by CMS is highly regulated and subject to change; our failure to comply with applicable regulations could result in decreased revenue
and may subject us to penalties or have an adverse impact on our business.

For  the  year  ended  December  31,  2019,  we  received  approximately  27%  of  our  revenue  from  reimbursement  for  our  Zio  service  by  CMS.  Under  CMS
guidelines for participation in the Medicare program CMS designates us as an independent diagnostic treatment facility (“IDTF”). CMS imposes extensive
and detailed requirements on IDTFs, including but not limited to, rules that govern how we structure our relationships with physicians, how and when we
submit reimbursement claims, how we operate our monitoring facilities and how and where we provide our monitoring solutions. Our failure to comply with
applicable CMS rules could result in a discontinuation of our reimbursement under the CMS payment programs, our being required to return funds already
paid to us, civil monetary penalties, criminal penalties and/or exclusion from the CMS programs.

Changes in public health insurance coverage and CMS reimbursement rates for the Zio service could affect the adoption of the Zio service and our future
revenue.

Government payors may change their coverage and reimbursement policies, as well as payment amounts, in a way that would prevent or limit reimbursement
for our Zio service, which would significantly harm our business. Government and other third-party payors require us to report the service for which we are
seeking reimbursement by using a Current Procedural Terminology, or CPT, code-set maintained by the American Medical Association (“AMA”). For Zio
XT, we have secured temporary CPT codes (or Category III CPT codes) used for newly introduced technologies and specific to our category of diagnostic
monitoring through 2022. The fees associated with these Category III CPT codes are also temporary and may be modified by CMS. Category III CPT codes
may be renewed for another five years or converted to permanent codes (or Category I CPT codes) based on specific requirements, including national use data
and published clinical evidence, as established by the AMA and CMS. The process to convert Category III CPT codes to Category I CPT codes is governed
by the AMA and CMS. On October 25, 2019, the AMA’s CPT Editorial Panel established two new Category I CPT codes which are applicable to the Zio
service  and  will  take  effect  on  January  1,  2021.  At  this  point  in  the  process  of  reviewing  new  codes  CMS  will  determine  the  appropriate  level  of
reimbursement for the procedures, which will be first published as a proposed rule in July 2020, with a 60 day comment period following and then a final rule
published  in  November  2020.  Once  Category  I  CPT  codes  are  valued  by  CMS  the  values  typically  remain  unchanged  for  five  years  after  the  values  are
initially determined. Category I CPT codes can have values and associated pricing that are higher, lower or equal to their associated Category III CPT codes.
We can provide no assurance that any Category I CPT code secured for the reimbursement of our Zio service will contain values and pricing that are the same
as or greater than the existing Category III CPT codes. In addition, to the extent CMS reduces its reimbursement rates for the Zio service, regardless of the
Category of CPT code, third-party payors may reduce the rates at which they reimburse the Zio service, which could adversely affect our revenue.

Determinations  of  which  products  or  services  will  be  reimbursed  under  Medicare  can  be  developed  at  the  national  level  through  a  national  coverage
determination  (“NCD”)  by  CMS,  or  at  the  local  level  through  a  local  coverage  determination,  or  an  LCD,  by  one  or  more  of  the  regional  Medicare
Administrative Contractors ("MACs") who are private contractors that process and pay claims on behalf of CMS for different regions. In the absence of an
NCD, as is the case with Zio XT, the MAC with jurisdiction over a specific geographic region will have the discretion to make an LCD and determine the fee
schedule  and  reimbursement  rate  associated  with  Category  III  CPT  codes,  and  regional  LCDs  may  not  always  be  consistent  among  all  MACs  or  regions
within the United States. We have in the past been, and in the future may be, required to respond to potential changes in reimbursement rates for our products.
Reductions in reimbursement rates, if enacted, could have a material adverse effect on our business. Further, a reduction in coverage by Medicare could cause
some commercial third-party payors to implement similar reductions in their coverage or level of reimbursement of the Zio service. Given the evolving nature
of the healthcare industry and on-going healthcare cost reforms, we are and will continue to be subject to changes in the level of Medicare coverage for our
products, and unfavorable coverage determinations at the national or local level could adversely affect our business and results of operations.

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Controls  imposed  by  CMS  and  commercial  third-party  payors  designed  to  reduce  costs,  commonly  referred  to  as  “utilization  review”,  may  affect  our
operations. Federal law contains numerous provisions designed to ensure that services rendered to CMS patients meet professionally recognized standards
and are medically necessary, appropriate for the specific patient and cost-effective. These provisions include a requirement that a sampling of CMS patients
must  be  reviewed  by  quality  improvement  organizations,  which  review  the  appropriateness  of  product  prescriptions,  the  quality  of  care  provided,  and  the
appropriateness  of  reimbursement  costs.  Quality  improvement  organizations  may  deny  payment  for  services  or  assess  fines  and  also  have  the  authority  to
recommend to the U.S. Department of Health and Human Services, that a provider which is in substantial noncompliance with the standards of the quality
improvement  organization  be  excluded  from  participation  in  the  Medicare  program.  The  Patient  Protection  and  Affordable  Care  Act,  as  amended  by  the
Health  Care  and  Education  Affordability  Reconciliation  Act,  or  Affordable  Care  Act,  potentially  expands  the  use  of  prepayment  review  by  Medicare
contractors  by  eliminating  statutory  restrictions  on  their  use,  and,  as  a  result,  efforts  to  impose  more  stringent  cost  controls  are  expected  to  continue.
Utilization review is also a requirement of most non-governmental managed care organizations and other third-party payors. To date these controls have not
had  a  significant  effect  on  our  operations,  but  significant  limits  on  the  scope  of  services  reimbursed  and  on  reimbursement  rates  and  fees  could  have  a
material, adverse effect on our business, financial position and results of operations in the future.

Each state’s Medicaid program has its own coverage determinations related to our services, and some state Medicaid programs do not provide their recipients
with coverage for our Zio service. Even if our Zio service is covered by a state Medicaid program, we must be recognized as a Medicaid provider by the state
in which the Medicaid recipient receiving the services resides in order for us to be reimbursed by a state’s Medicaid program. Even if we are recognized as a
provider  in  a  state,  Medicare’s  rate  for  our  Zio  service  may  be  low,  and  the  Medicaid  reimbursement  amounts  are  sometimes  as  low,  or  lower,  than  the
Medicare reimbursement rate. In addition, and as noted above, each state’s Medicaid program has its own coverage determinations related to our Zio service,
and many state Medicaid programs do not provide their recipients with coverage for our Zio service. As a result of all of these factors, our Zio service is not
reimbursed or only reimbursed at a very low dollar amount by many state Medicaid programs. In some cases, a state Medicaid program’s reimbursement rate
for  our  Zio  service  might  be  zero  dollars.  Additionally,  certain  states  may  require  Medicaid  recipients  to  pay  for  part  of  the  Zio  Service,  and  since  the
recipients of Medicaid are low income individuals, we are often unable to collect any amounts directly from individual recipients of the Zio service covered
by Medicaid. Low or zero dollar Medicaid reimbursement rates for our Zio service would have an adverse effect on our business, gross margins and revenues.
Most of the Zio services we provide are reimbursed through Medicare or private third party payors and not Medicaid, but if that were to change in the future,
or the percentage of Zio services provided to Medicaid recipients were to increase, our gross margins would be adversely affected as a result.

Also, healthcare reform legislation or regulation may be proposed or enacted in the future that may adversely affect such policies and amounts. Changes in
the  healthcare  industry  directed  at  controlling  healthcare  costs  or  perceived  over-utilization  of  ambulatory  cardiac  monitoring  products  and  services  could
reduce the volume of Zio services prescribed by physicians. If more healthcare cost controls are broadly instituted throughout the healthcare industry, the
volume of cardiac monitoring solutions prescribed could decrease, resulting in pricing pressure and declining demand for our Zio service. We cannot predict
whether  and  to  what  extent  existing  coverage  and  reimbursement  will  continue  to  be  available.  If  physicians,  hospitals  and  clinics  are  unable  to  obtain
adequate coverage and government reimbursement of the Zio service, they are significantly less likely to use the Zio service and our business and operating
results would be harmed.

The  current  presidential  administration  and  Congress  may  attempt  to  make  sweeping  changes  to  the  current  healthcare  laws  and  their  implementing
regulations. It is uncertain how modification or repeal of any of the provisions of the Affordable Care Act or its implementing regulations, including as a
result of current and future executive orders and legislative actions, will impact us and the medical device industry as a whole. Any changes to, or repeal of,
the  Affordable  Care  Act  or  its  implementing  regulations  may  have  a  material  adverse  effect  on  our  results  of  operations.  We  cannot  predict  what  other
healthcare  programs  and  regulations  will  ultimately  be  implemented  at  the  federal  or  state  level  or  the  effect  of  any  future  legislation  or  regulation  in  the
United States may have on our business.

If third-party commercial payors do not provide any or adequate reimbursement, rescind or modify their reimbursement policies or delay payments for
our  products,  including  the  Zio  service,  or  if  we  are  unable  to  successfully  negotiate  reimbursement  contracts,  our  commercial  success  could  be
compromised.

We receive a substantial portion of our revenue from third-party private commercial payors, such as medical insurance companies. These commercial payors
may  reimburse  our  products,  including  the  Zio  service,  at  inadequate  rates,  suspend  or  discontinue  reimbursement  at  any  time  or  require  or  increase  co-
payments from patients. Any such actions could have a negative effect on our revenue and the revenue of providers prescribing our products. Physicians may
not prescribe our products unless payors reimburse a substantial portion of the submitted costs, including the physician’s, hospital’s or clinic’s charges related
to the application of certain products, including the Zio monitor and the interpretation of results which may

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inform a diagnosis. Additionally, certain payors may require that physicians prescribe another arrhythmia diagnostic monitoring option prior to prescribing
the Zio service. There is significant uncertainty concerning third-party reimbursement of any new product or service until a contracted rate is established.
Reimbursement by a commercial payor may depend on a number of factors, including, but not limited to, a payor’s determination that the prescribed service
is:

•
•
•
•
•

not experimental or investigational;
appropriate for the specific patient;
cost effective;
supported by peer-reviewed publications; and
accepted and used by physicians within their provider network.

Since each payor makes its own decision as to whether to establish a policy concerning reimbursement or enter into a contract with us to set the price of
reimbursement, seeking reimbursement on a payor-by-payor basis is a time consuming and costly process to which we dedicate substantial resources. If we
do not dedicate sufficient resources to establishing contracts with third-party commercial payors, or continue to validate the clinical value of Zio services
through studies and physician adoption, the amount that we are reimbursed for our products may decline, our revenue may become less predictable, and we
will need to expend more efforts on a claim-by-claim basis to obtain reimbursement for our products.

A  substantial  portion  of  our  revenue  is  derived  from  third-party  commercial  payors  who  have  pricing  contracts  with  us,  which  means  that  the  payor  has
agreed to a defined reimbursement rate for our services. These contracts provide a high degree of certainty to us, physicians, clinics and hospitals with respect
to  the  rate  at  which  our  services  will  be  reimbursed.  These  contracts  also  impose  a  number  of  obligations  regarding  billing  and  other  matters,  and  our
noncompliance with a material term of such contracts may result in termination of the contract and loss of any associated revenue. We expect to continue to
dedicate resources to maintaining compliance with these contracted payors, to ensure payors acknowledge and are aware of the clinical and economic value of
our services and the interest on the part of physicians, clinics and hospitals who use our services and participate in their provider networks; however, we can
provide  no  assurance  that  we  will  retain  any  given  contractual  payor  relationship.  A  loss  of  these  pricing  contracts  can  increase  the  uncertainty  of
reimbursement of claims from third-party payors.

A portion of our revenue is derived from third-party commercial payors without such contracts in place. Without a contracted rate, reimbursement claims for
our products are often denied upon submission, and we or our billing partner, XIFIN, Inc. (“XIFIN”), must appeal the denial. The appeals process is time-
consuming and expensive, and may not result in full or any payment. In cases where there is no contracted rate for reimbursement it may be more difficult for
us to acquire new accounts with physicians, clinics and hospitals. In addition, in the absence of a contracted rate, there is typically a greater out-of-network,
co-insurance  or  co-payment  requirement  which  may  result  in  payment  delays  or  decreased  likelihood  of  full  collection.  In  some  cases  involving  non-
contracted insurance companies, we may not be able to collect any amount or only a portion of the invoiced amount for our services.

We expect to continue to dedicate resources to establishing pricing contracts with non-contracted insurance companies; however, we can provide no assurance
that  we  will  be  successful  in  obtaining  such  pricing  contracts  or  that  such  pricing  contracts  will  contain  reimbursement  for  our  services  at  rates  that  are
favorable to us. If we fail to establish these contracts, we will be able to recognize revenue only based on an estimated average collection rate per historical
cash collections. In addition, XIFIN may need to expend significant resources obtaining reimbursement on a claim-by-claim basis and in adjudicating claims
which  are  denied  altogether  or  not  reimbursed  at  acceptable  rates.  We  currently  pay  XIFIN  a  percentage  of  the  amounts  it  collects  on  our  behalf  and  this
percentage may increase in the future if it needs to expend more resources in adjudicating such claims. We sometimes informally engage physicians, hospitals
and clinics to help establish contracts with third-party payors who insure their patients. We cannot provide any assurance that such physicians, hospitals and
clinics will continue to help us establish contracts in the future. If we fail to establish contracts with more third-party payors it may adversely affect our ability
to  increase  our  revenue.  In  addition,  a  failure  to  enter  into  contracts  could  affect  a  physician’s  willingness  to  prescribe  our  services  because  of  the
administrative work involved in interacting with patients to answer their questions and help them obtain reimbursement for our services. If physicians are
unwilling  to  prescribe  our  services  due  to  the  lack  of  certainty  and  administrative  work  involved  with  patients  covered  by  non-contracted  insurance
companies, or patients covered by non-contracted insurance companies are unwilling to risk that their insurance may charge additional out-of-pocket fees, our
revenue could decline or fail to increase.

Our  continued  rapid  growth  could  strain  our  personnel  resources  and  infrastructure,  and  if  we  are  unable  to  manage  the  anticipated  growth  of  our
business, our future revenue and operating results may be harmed.

We  have  experienced  rapid  growth  in  our  headcount  and  in  our  operations.  Any  growth  that  we  experience  in  the  future  will  provide  challenges  to  our
organization, requiring us to expand our sales personnel and manufacturing operations and general

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and administrative infrastructure. In addition to the need to scale our clinical operations capacity, future growth will impose significant added responsibilities
on  management,  including  the  need  to  identify,  recruit,  train  and  integrate  additional  employees.  Rapid  expansion  in  personnel  could  mean  that  less
experienced  people  manufacture  our  Zio  monitors,  market  and  sell  our  Zio  service  and  analyze  the  data  to  produce  Zio  reports,  which  could  result  in
inefficiencies and unanticipated costs, reduced quality in either our Zio reports or manufactured devices, and disruptions to our service operations. As we seek
to gain greater efficiency, we may expand the automated portion of our Zio service and require productivity improvements from our certified cardiographic
technicians. Such improvements could compromise the quality of our Zio reports. In addition, rapid and significant growth may strain our administrative and
operational infrastructure. Our ability to manage our business and growth will require us to continue to improve our operational, financial and management
controls, reporting systems and procedures. If we are unable to manage our growth effectively, it may be difficult for us to execute our business strategy and
our business could be harmed.

If we are unable to support demand for the Zio service or any of our future products or services, our business could suffer.

As demand for the Zio service or any of our future products or services increases, we will need to continue to scale our manufacturing capacity and algorithm
processing  technology,  expand  customer  service,  billing  and  systems  processes  and  enhance  our  internal  quality  assurance  program.  We  will  also  need
additional certified cardiographic technicians and other personnel to process higher volumes of data. We cannot assure you that, with any increases in scale,
required improvements will be successfully implemented, quality assurance will be maintained, or that appropriate personnel will be available to facilitate
growth of our business. Failure to implement necessary procedures, transition to new processes or hire the necessary personnel could result in higher costs of
processing data or inability to meet increased demand. There can be no assurance that we will be able to perform our data analysis on a timely basis at a level
consistent  with  demand,  quality  standards  and  physician  expectations.  If  we  encounter  difficulty  meeting  market  demand,  quality  standards  or  physician
expectations, our reputation could be harmed and our future prospects and business could suffer.

We plan to introduce new products and services and our business will be harmed if we are not successful in selling these new products and services to our
existing customers and new customers

We most recently received FDA clearance for our Zio AT ECG Monitoring System, (“Zio AT”), which is designed to provide timely transmission of data
during the wear period. We do not yet know whether Zio AT or any other new products and services will be well received and broadly adopted by physicians
and  their  patients  or  whether  sales  will  be  sufficient  for  us  to  offset  the  costs  of  development,  implementation,  support,  operation,  sales  and  marketing.
Although  we  have  performed  extensive  testing  of  our  new  products  and  services,  their  broad-based  implementation  may  require  more  support  than  we
anticipate, which would further increase our expenses. Additionally, new products and services may subject us to additional risks of product performance,
customer complaints and litigation. If sales of our new products and services are lower than we expect, or if we expend additional resources to fix unforeseen
problems and develop modifications, our operating margins are likely to decrease.

If we are unable to keep up with demand for the Zio service, our revenue could be impaired, market acceptance for the Zio service could be harmed and
physicians may instead prescribe our competitors’ products and services.

As demand for the Zio service increases, we may encounter production or service delays or shortfalls. Such production or service delays or shortfalls may be
caused by many factors, including the following:

• we intend to continue to expand our manufacturing capacity, and our production processes may have to change to accommodate this growth;
•

key components of the Zio monitors are provided by a single supplier or limited number of suppliers, and we do not maintain large inventory levels
of these components; if we experience a shortage or quality issues in any of these components, we would need to identify and qualify new supply
sources, which could increase our expenses and result in manufacturing delays;
global  demand  and  supply  factors  concerning  commodity  components  common  to  all  electronic  circuits,  including  Zio  monitors,  could  result  in
shortages that manifest as extended lead times for circuit boards, which could limit our ability to sustain and/or grow our business;

•

• we may experience a delay in completing validation and verification testing for new production processes and/or equipment at our manufacturing

facilities;

• we are subject to state, federal and international regulations, including the FDA’s Quality System Regulation (“QSR”), the EU’s Medical Device
Directive (“MDD”) and, as of May 2020, the EU’s Medical Device Regulation (“MDR”) for both the manufacture of the Zio monitor and the
provision of the Zio service, noncompliance with which could cause an interruption in our manufacturing and services; and

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•

to increase our manufacturing output significantly and scale our services, we will have to attract and retain qualified employees for our operations.

Our inability to successfully manufacture our Zio monitors in sufficient quantities, or provide the Zio service in a timely manner, would materially harm our
business.

Our  manufacturing  facilities  and  processes  and  those  of  our  third-party  suppliers  are  subject  to  unannounced  FDA,  state  and  Notified  Body  regulatory
inspections for compliance with the QSR, MDD and, in the near future, MDR requirements. Developing and maintaining a compliant quality system is time
consuming and investment intensive. Failure to maintain compliance with, or not fully complying with the requirements of the FDA and state regulators could
result  in  enforcement  actions  against  us  or  our  third-party  suppliers,  which  could  include  the  issuance  of  warning  letters,  adverse  publicity,  seizures,
prohibitions on product sales, recalls and civil and criminal penalties, any one of which could significantly impact our manufacturing supply and provision of
services and impair our financial results.

We depend on third-party vendors to manufacture some of our components, which could make us vulnerable to supply shortages and price fluctuations
that could harm our business.

We rely on third-party vendors for components used in our Zio monitors. Our reliance on third-party vendors subjects us to a number of risks, including:

inability to obtain adequate supply in a timely manner or on commercially reasonable terms;
interruption of supply resulting from modifications to, or discontinuation of, a supplier’s operations;
production delays related to the evaluation and testing of products from alternative suppliers and corresponding regulatory qualifications;
inability of the manufacturer or supplier to comply with the QSR and state regulatory authorities;

•
•
•
•
• miscommunication of design specifications due to errors/omissions by either the vendor or our company, resulting delayed delivery of acceptable

product;
delays in product shipments resulting from uncorrected defects, reliability issues, or a supplier’s failure to consistently produce quality components;
an outbreak of disease or similar public health threat, such as the existing threat of coronavirus, particularly as it may impact our supply chain should
the slowdown in China persist;
price fluctuations due to a lack of long-term supply arrangements with our suppliers for key components;
inability to control the quality of products manufactured by third parties; and
delays in delivery by our suppliers due to changes in demand from us or their other customers.

•
•

•
•
•

Any  significant  delay  or  interruption  in  the  supply  of  components  or  sub-assemblies,  or  our  inability  to  obtain  substitute  components,  sub-assemblies  or
materials from alternate sources at acceptable prices and in a timely manner could impair our ability to meet the demand for our Zio service and harm our
business.

We  rely  on  single  suppliers  for  some  of  the  materials  used  in  our  products,  and  if  any  of  those  suppliers  are  unable  or  unwilling  to  produce  these
materials or supply them in the quantities that we need at the quality we require, we may not be able to find replacements or transition to alternative
suppliers before our business is materially impacted.

We rely on single suppliers for the supply of our adhesive substrate, disposable plastic housings, instruments and other materials that we use to manufacture
and  label  our  Zio  monitors.  These  components  and  materials  are  critical  and  there  are  relatively  few  alternative  sources  of  supply.  We  have  not  qualified
additional suppliers for some of these components and materials and we do not carry a significant inventory of these items. While we believe that alternative
sources of supply may be available, we cannot be certain whether they will be available if and when we need them and that any alternative suppliers would be
able  to  provide  the  quantity  and  quality  of  components  and  materials  that  we  would  need  to  manufacture  our  Zio  monitors  if  our  existing  suppliers  were
unable to satisfy our supply requirements. To utilize other supply sources, we would need to identify and qualify new suppliers to our quality standards, which
could  result  in  manufacturing  delays  and  increase  our  expenses.  Any  supply  interruption  could  limit  our  ability  to  manufacture  our  products  and  could
therefore harm our business, financial condition and results of operations. If our current suppliers and any alternative suppliers do not provide us with the
materials  we  need  to  manufacture  our  products  or  perform  our  services,  if  the  materials  do  not  meet  our  quality  specifications,  or  if  we  cannot  obtain
acceptable substitute materials, an interruption in our Zio service could occur. Any such interruption may significantly affect our future revenue and harm our
relations and reputation with physicians, hospitals, clinics and patients.

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If  our  manufacturing  facility  becomes  damaged  or  inoperable,  or  if  we  are  required  to  vacate  the  facility,  we  may  be  unable  to  manufacture  our  Zio
monitors or we may experience delays in production or an increase in costs which could adversely affect our results of operations.

We currently manufacture and assemble the Zio monitors in only one location. Our products are comprised of components sourced from a variety of contract
manufacturers, with final assembly completed at our facility in Cypress, California. Our facility and equipment, or those of our suppliers, could be harmed or
rendered inoperable by natural or man-made disasters, including fire, earthquake, terrorism, flooding and power outages. Any of these may render it difficult
or impossible for us to both manufacture new products and receive returned units for some period of time. If our Cypress facility is inoperable for even a short
period of time, the inability to manufacture and receive our Zio monitors, and the interruption in research and development of any future products, may result
in harm to our reputation, increased costs, the loss of orders and lower revenue. Furthermore, it could be costly and time consuming to repair or replace our
facilities and the equipment we use to perform our research and development work and manufacture our products.

If we fail to increase our sales and marketing capabilities and develop broad brand awareness in a cost effective manner, our growth will be impeded and
our business may suffer.

We  plan  to  continue  to  expand  and  optimize  our  sales  and  marketing  infrastructure  in  order  to  increase  our  prescribing  physician  base  and  our  business.
Identifying and recruiting qualified personnel and training them in the application of the Zio service, on applicable federal and state laws and regulations and
on our internal policies and procedures requires significant time, expense and attention. It often takes several months or more before a sales representative is
fully  trained  and  productive.  Our  business  may  be  harmed  if  our  efforts  to  expand  and  train  our  sales  force  do  not  generate  a  corresponding  increase  in
revenue. In particular, if we are unable to hire, develop and retain talented sales personnel or if new sales personnel are unable to achieve desired productivity
levels in a reasonable period of time, we may not be able to realize the expected benefits of this investment or increase our revenue.

Our ability to increase our customer base and achieve broader market acceptance of our products will depend, to a significant extent, on our ability to expand
our  marketing  efforts.  We  plan  to  dedicate  significant  resources  to  our  marketing  programs.  Our  business  may  be  harmed  if  our  marketing  efforts  and
expenditures do not generate a corresponding increase in revenue.

In addition, we believe that developing and maintaining broad awareness of our brand in a cost effective manner is critical to achieving broad acceptance of
the Zio service and penetrating new accounts. Brand promotion activities may not generate patient or physician awareness or increase revenue, and even if
they do, any increase in revenue may not offset the costs and expenses we incur in building our brand. If we fail to successfully promote, maintain and protect
our brand, we may fail to attract or retain the physician acceptance necessary to realize a sufficient return on our brand building efforts, or to achieve the level
of brand awareness that is critical for broad adoption of the Zio service.

Billing for our Zio service is complex, and we must dedicate substantial time and resources to the billing process.

Billing  for  IDTF  services  is  complex,  time  consuming  and  expensive.  Depending  on  the  billing  arrangement  and  applicable  law,  we  bill  several  types  of
payors, including CMS, third-party commercial payors, institutions and patients, which may have different billing requirements procedures or expectations.
We also must bill patient co-payments, co-insurance and deductibles. We face risk in our collection efforts, including potential write-offs of doubtful accounts
and long collection cycles, which could adversely affect our business, financial condition and results of operations.
Several factors make the billing and collection process uncertain, including:

•
•
•
•
•

differences between the submitted price for our Zio service and the reimbursement rates of payors;
compliance with complex federal and state regulations related to billing CMS;
differences in coverage among payors and the effect of patient co-payments, co-insurance and deductibles;
differences in information and billing requirements among payors; and
incorrect or missing patient history, indications or billing information.

Additionally,  our  billing  activities  require  us  to  implement  compliance  procedures  and  oversight,  train  and  monitor  our  employees  and  undertake  internal
review procedures to evaluate compliance with applicable laws, regulations and internal policies. Payors also conduct audits to evaluate claims, which may
add further cost and uncertainty to the billing process. These billing complexities, and the related uncertainty in obtaining payment for our Zio service, could
negatively affect our revenue and cash flow, our ability to achieve profitability, and the consistency and comparability of our results of operations.

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The operation of our call centers and monitoring facilities is subject to rules and regulations governing IDTFs; failure to comply with these rules could
prevent us from receiving reimbursement from CMS and some commercial payors.

In order to be a participating provider in the Medicare program, and to be reimbursed by CMS under the program, we established an independent diagnostic
treatment  facility  (or  “IDTF”).  An  IDTF  is  a  “provider-type”  designation  under  Medicare,  defined  by  CMS  as  an  entity(ies)  independent  of  a  hospital  or
physician’s  office  in  which  diagnostic  tests  are  performed  by  licensed  or  certified  nonphysician  personnel  under  appropriate  physician  supervision.  Our
IDTFs are staffed by certified cardiographic technicians, who are overseen by a medical director who reviews the accuracy of the data we curate and from
which we prepare reports. The existence of an IDTF allows us to bill a government payor for the Zio service through one or more MACs, such as Novitas
Solutions,  Noridian  Healthcare  Solutions  and  Palmetto  GBA.  MACs  are  companies  that  operate  on  behalf  of  the  federal  government  to  process  Medicare
claims for reimbursement and allow us to obtain reimbursement for our Zio service at CMS defined rates. Certification as an IDTF requires that we follow
strict  regulations  governing  how  the  center  operates,  such  as  requirements  regarding  the  experience  and  certifications  of  the  certified  cardiographic
technicians.  In  addition,  many  commercial  payors  require  our  IDTFs  to  maintain  accreditation  and  certification  with  the  Joint  Commission  of  American
Hospitals. To do so we must demonstrate a specified quality standard and are subject to routine inspection and audits. These rules and regulations vary from
location to location and are subject to change. If they change, we may have to change the operating procedures at our IDTFs, which could increase our costs
significantly. If we fail to obtain and maintain IDTF certification, our Zio service may no longer be reimbursed by CMS and some commercial payors, which
would have a material adverse impact on our business.

During  the  year  ended  2019,  we  recognized  approximately  five  percent  of  our  revenue  from  non-contracted  third-party  payors,  and  as  a  result,  our
quarterly operating results are difficult to predict.

We have limited visibility as to when we will receive payment for our Zio service with non-contracted payors and we or XIFIN must appeal any negative
payment decisions, which often delay collections further. Additionally, a portion of the revenue from non-contracted payors is received from patient co-pays,
which we may not receive for several months following delivery of service or at all. For revenue related to non-contracted payors, we estimate an average
collection  rate  based  on  factors  including  historical  cash  collections.  Subsequent  adjustments,  if  applicable,  are  recorded  as  an  adjustment  to  revenue.
Fluctuations in revenue may make it difficult for us, research analysts and investors to accurately forecast our revenue and operating results or to assess our
actual performance. If our revenue or operating results fall below expectations, the price of our common stock would likely decline.

We rely on a third-party billing company, XIFIN, to transmit and pursue claims with payors. A delay in transmitting or pursuing claims could have an
adverse effect on our revenue.

While we manage the overall processing of claims, we rely on XIFIN to transmit substantially all of our claims to payors, and pursue most claim denials. If
claims for our Zio service are not submitted to payors on a timely basis, not properly adjudicated upon a denial, or if we are required to switch to a different
claims processor, we may experience delays in our ability to process receipt of payments from payors, which would have an adverse effect on our revenue and
our business.

The market for ambulatory cardiac monitoring solutions is highly competitive. If our competitors are able to develop or market monitoring products and
services that are more effective, or gain greater acceptance in the marketplace, than any products and services we develop, our commercial opportunities
will be reduced or eliminated.

The market for ambulatory cardiac monitoring products and services is evolving rapidly and becoming increasingly competitive. Our Zio service competes
with a variety of products and services that provide alternatives for ambulatory cardiac monitoring, including Holter monitors and mobile cardiac telemetry
monitors.  Our  industry  is  highly  fragmented  and  characterized  by  a  small  number  of  large  manufacturers  and  a  large  number  of  smaller  regional  service
providers.  These  third  parties  compete  with  us  in  marketing  to  payors  and  prescribing  physicians,  recruiting  and  retaining  qualified  personnel,  acquiring
technology and developing products and services that compete with the Zio service. Our ability to compete effectively depends on our ability to distinguish
our company and the Zio service from our competitors and their products, and includes such factors as:

•
•
•
•
•
•

safety and efficacy;
acute and long term outcomes;
ease of use;
price;
physician, hospital and clinic acceptance; and
third-party reimbursement.

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Large  competitors  in  the  ambulatory  cardiac  market  include  companies  that  sell  standard  Holter  monitor  equipment  such  as  GE  Healthcare,  Philips
Healthcare, Mortara Instrument, Inc., Spacelabs Healthcare, Inc. and Welch Allyn Holdings, Inc., which was acquired by Hill-Rom Holdings, Inc. Additional
competitors, such as BioTelemetry, Inc. and Preventice Solutions, Inc., offer Holter and event, and mobile telemetry monitors, and also function as service
providers. These companies have also developed other patch-based cardiac monitors that have received FDA and foreign regulatory clearances such as ePatch
and MCOT Patch. There are also several small start-up companies trying to compete in the patch-based cardiac monitoring space. We have seen a trend in the
market for large medical device companies to acquire, invest in or form alliances with these smaller companies in order to diversify their product offerings
and  participate  in  the  digital  health  space.  Future  competition  could  come  from  makers  of  wearable  fitness  products  or  large  information  technology
companies focused on improving healthcare. For example, Apple Inc. recently added capabilities on its watch platform to measure non-continuous ECG and
to alert users to the potential presence of irregular heartbeats suggestive of asymptomatic AF. These competitors and potential competitors may introduce new
products that compete with our Zio service. Many of our competitors and potential competitors have significantly greater financial and other resources than
we do and have well-established reputations, broader product offerings, and worldwide distribution channels that are significantly larger and more effective
than  ours.  If  our  competitors  and  potential  competitors  are  better  able  to  develop  new  ambulatory  cardiac  monitoring  solutions  than  us,  or  develop  more
effective or less expensive cardiac monitoring solutions, they may render our current Zio service obsolete or non-competitive. Competitors may also be able
to  deploy  larger  or  more  effective  sales  and  marketing  resources  than  we  currently  have.  Competition  with  these  companies  could  result  in  price  cutting,
reduced profit margins and loss of market share, any of which would harm our business, financial condition and results of operations.

Our ability to compete depends on our ability to innovate successfully.

The  market  for  medical  devices,  including  the  ambulatory  cardiac  monitoring  segment,  is  competitive,  dynamic,  and  marked  by  rapid  and  substantial
technological development and product innovation. There are few barriers that would prevent new entrants or existing competitors from developing products
that compete directly with ours. Demand for the Zio service and future related products or services could be diminished by equivalent or superior products
and technologies offered by competitors. If we are unable to innovate successfully, our products and services could become obsolete and our revenue would
decline as our customers purchase our competitors’ products and services.

In order to remain competitive, we must continue to develop new product offerings and enhancements to the Zio service. We can provide no assurance that
we  will  be  successful  in  monetizing  our  electrocardiogram  (“ECG”)  database,  expanding  the  indications  for  our  Zio  service,  developing  new  products  or
commercializing  them  in  ways  that  achieve  market  acceptance.  In  addition,  if  we  develop  new  products,  sales  of  those  products  may  reduce  revenue
generated  from  our  existing  products.  Maintaining  adequate  research  and  development  personnel  and  resources  to  meet  the  demands  of  the  market  is
essential. If we are unable to develop new products, applications or features or improve our algorithms due to constraints, such as insufficient cash resources,
high employee turnover, inability to hire personnel with sufficient technical skills or a lack of other research and development resources, we may not be able
to maintain our competitive position compared to other companies. Furthermore, many of our competitors devote a considerably greater amount of funds to
their research and development programs than we do, and those that do not may be acquired by larger companies that would allocate greater resources to
research and development programs. Our failure or inability to devote adequate research and development resources or compete effectively with the research
and development programs of our competitors could harm our business.

We  have  entered  into  a  collaboration  agreement  with  a  third  party  that  may  not  result  in  the  development  of  commercially  viable  products  or  the
generation of significant future revenues.

We  have  entered  into  a  collaboration  agreement  with  Verily  Life  Sciences  LLC  (an  Alphabet  Company,  referred  to  as  “Verily”)  to  develop  certain  next-
generation  AF  screening,  detection,  or  monitoring  products,  which  involve  combining  Verily  and  our  technology  platforms  and  capabilities  (the
“Development  Agreement”).  As  part  of  the  Development  Agreement,  we  paid  Verily  an  up-front  fee  of  $5.0  million  in  cash  and  have  agreed  to  make
additional payments over the term of the Development Agreement up to an aggregate of $12.75 million, subject to the achievement of certain development
and regulatory milestones. The success of our collaboration with Verily is highly dependent on the efforts provided to the collaboration by Verily and us and
the  skill  sets  of  our  respective  employees.  Support  of  these  development  efforts  requires  significant  resources,  including  research  and  development,
manufacturing, quality assurance, and clinical and regulatory personnel. Even if our development and clinical trial efforts succeed, the FDA may not approve
the developed products or may require additional product testing and clinical trials before approving the developed products, which would result in product
launch delays and additional expense. If approved by the FDA, the developed products may not be accepted in the marketplace.

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After  the  initial  term  of  the  Development  Agreement,  in  order  to  commercialize  any  developed  products  with  Verily,  we  will  need  to  enter  into  a
commercialization agreement. There is no guarantee that we will be able to enter into such an agreement on commercially reasonable terms or at all. If we are
unable to reach agreement with Verily on terms, the up-front fee and regulatory and development milestone payments and our internal development costs
would not be recovered and the licenses to use Verily’s technology will expire.

This collaboration may not result in the development of products that achieve commercial success and could be terminated prior to developing any products.
In the event of any termination or expiration of the Development Agreement, we may be required to devote additional resources to product development and
we may face increased competition, including from Verily. Verily may use the experience and insights it develops in the course of the collaboration with us to
initiate  or  accelerate  their  development  of  products  that  compete  with  our  products,  which  may  create  competitive  disadvantages  for  us.  Accordingly,  we
cannot provide assurance that our collaboration with Verily or any other third party will result in the successful development of commercially viable products
or result in significant additional future revenues for our company.

The continuing clinical acceptance of the Zio service depends upon maintaining strong working relationships with physicians.

The development, marketing, and sale of the Zio service depends upon our ability to maintain strong working relationships with physicians and other key
opinion leaders. We rely on these professionals’ knowledge and experience for the development, marketing and sale of our products. Among other things,
physicians assist us in clinical trials and product development matters and provide public presentations at trade conferences regarding the Zio service. If we
cannot maintain our strong working relationships with these professionals and continue to receive their advice and input, the development and marketing of
the Zio service could suffer, which could harm our business, financial condition and results of operations.

The medical device industry’s relationship with physicians is under increasing scrutiny by the Health and Human Services Office of the Inspector General,
(“OIG”), the Department of Justice (“DOJ”), state attorneys general, and other foreign and domestic government agencies. Our failure to comply with laws,
rules and regulations governing our relationships with physicians, or an investigation into our compliance by the OIG, DOJ, state attorneys general or other
government agencies, could significantly harm our business.

We have a significant amount of debt, which may affect our ability to operate our business and secure additional financing in the future.

As of December 31, 2019, we had $35.0 million outstanding under our revolving credit facility provided by of our loan agreement with Silicon Valley Bank
(“SVB”). We must make significant annual debt payments under the loan agreement which will divert resources from other activities. Our debt with SVB is
collateralized by substantially all of our assets and contains customary financial and operating covenants limiting our ability to, among other things, dispose
of  assets,  undergo  a  change  in  control,  merge  or  consolidate,  enter  into  certain  transactions  with  affiliates,  make  acquisitions,  incur  debt,  incur  liens,  pay
dividends, repurchase stock and make investments, in each case subject to certain exceptions. The covenants in the loan agreement, as well as in any future
financing agreements into which we may enter, may restrict our ability to finance our operations and engage in, expand or otherwise pursue our business
activities  and  strategies.  Our  ability  to  comply  with  these  covenants  may  be  affected  by  events  beyond  our  control  and  future  breaches  of  any  of  these
covenants could result in a default under the loan agreement. If not waived, future defaults could cause all of the outstanding indebtedness under the loan
agreement to become immediately due and payable and terminate commitments to extend further credit. If we do not have or are unable to generate sufficient
cash available to repay our debt obligations when they become due and payable, either upon maturity or in the event of a default, we may not be able to obtain
additional  debt  or  equity  financing  on  favorable  terms,  if  at  all,  which  may  negatively  impact  our  ability  to  operate  and  continue  our  business  as  a  going
concern.

We depend on our senior management team and the loss of one or more key employees or an inability to attract and retain highly skilled employees could
harm our business.

Our  success  depends  largely  on  the  continued  services  of  key  members  of  our  executive  management  team  and  others  in  key  management  positions.  For
example, the services of Kevin M. King, our Chief Executive Officer, Karim Karti, our Chief Operating Officer, and Matthew C. Garrett, our Chief Financial
Officer, are essential to formulating and executing on corporate strategy and to ensuring the continued operations and integrity of financial reporting within
our company. In addition, the services provided by David A. Vort, our Executive Vice President of Sales, are critical to the growth that we have experienced
in  the  sales  of  our  Zio  service.  Our  employees  may  terminate  their  employment  with  us  at  any  time.  If  we  lose  one  or  more  key  employees,  we  may
experience  difficulties  in  competing  effectively,  developing  our  technologies  and  implementing  our  business  strategy.  We  do  not  currently  maintain  key
person life insurance policies on these or any of our employees.

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In addition, our research and development programs and clinical operations depend on our ability to attract and retain highly skilled engineers and certified
cardiographic  technicians.  We  may  not  be  able  to  attract  or  retain  qualified  engineers  and  certified  cardiographic  technicians  in  the  future  due  to  the
competition  for  qualified  personnel.  We  have  from  time  to  time  experienced,  and  we  expect  to  continue  to  experience,  difficulty  in  hiring  and  retaining
employees with appropriate qualifications. Many of the companies with which we compete for experienced personnel have greater resources than us. If we
hire  employees  from  competitors  or  other  companies,  their  former  employers  may  attempt  to  assert  that  these  employees  or  we  have  breached  legal
obligations, resulting in a diversion of our time and resources and, potentially, damages. In addition, job candidates and existing employees, particularly in the
San Francisco Bay Area, often consider the value of the stock awards they receive in connection with their employment. If the perceived value of our stock
awards declines, it may harm our ability to recruit and retain highly skilled employees. If we fail to attract new personnel or fail to retain and motivate our
current personnel, our business and future growth prospects would be harmed.

International  expansion  of  our  business  exposes  us  to  market,  regulatory,  political,  operational,  financial  and  economic  risks  associated  with  doing
business outside of the United States.

Our business strategy includes international expansion. Doing business internationally involves a number of risks, including:

• multiple, conflicting and changing laws and regulations such as tax laws, privacy laws, export and import restrictions, employment laws, regulatory

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requirements and other governmental approvals, permits and licenses;
obtaining and sustaining regulatory approvals where required for the sale of our products and services in various countries;
requirements to maintain data and the processing of that data on servers located within such countries;
complexities associated with managing multiple payor reimbursement regimes, government payors or patient self-pay systems;
logistics and regulations associated with shipping and returning our Zio monitors following use;
limits on our ability to penetrate international markets if we are required to process the Zio service locally;
financial  risks,  such  as  longer  payment  cycles,  difficulty  collecting  accounts  receivable,  the  effect  of  local  and  regional  financial  pressures  on
demand and payment for our products and services and exposure to foreign currency exchange rate fluctuations;
natural disasters, political and economic instability, including wars, terrorism, political unrest, outbreak of disease, boycotts, curtailment of trade and
other market restrictions;
regulatory  and  compliance  risks  that  relate  to  maintaining  accurate  information  and  control  over  activities  subject  to  regulation  under  the  United
States Foreign Corrupt Practices Act of 1977 (“FCPA”), U.K. Bribery Act of 2010 and comparable laws and regulations in other countries; and
compliance  risks  associated  with  General  Data  Protection  Regulation  (“GDPR”)  enacted  to  protect  the  privacy  of  all  individuals  in  the  European
Union and addresses export of the data outside of the European Union.

Any of these factors could significantly harm our future international expansion and operations and, consequently, our revenue and results of operations.

Our relationships with business partners in new international markets may subject us to an increased risk of litigation.

As we expand our business internationally, if we cannot successfully manage the unique challenges presented by international markets and our relationships
with  new  business  partners  within  those  markets,  our  expansion  activities  may  be  adversely  affected  and  we  may  become  subject  to  an  increased  risk  of
litigation.

We may become involved in disputes relating to our products, contracts and business relationships. Such disputes include litigation against persons whom we
believe  have  infringed  on  our  intellectual  property,  infringement  litigation  filed  against  us,  litigation  against  a  competitor  or  litigation  filed  against  us  by
distributors or service providers resulting from a breach of contract or other claim. Any of these disputes may result in substantial costs to us, judgments,
settlements and diversion of our management’s attention, which could adversely affect our business, financial condition or operating results. There is also a
risk of adverse judgments, as the outcome of litigation in foreign jurisdictions can be inherently uncertain.

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We could be adversely affected by violations of the FCPA, and similar worldwide anti-bribery laws and the ongoing investigation, and outcome of the
investigation, by government agencies of possible violations by us of the FCPA could have a material adverse effect on our business.

The  FCPA  and  similar  worldwide  anti-bribery  laws  generally  prohibit  companies  and  their  intermediaries  from  corruptly  providing  any  benefits  to
government officials for the purpose of obtaining or retaining business. We are in the process of designing and implementing policies and procedures intended
to help ensure compliance with these laws. In the future, we may operate in parts of the world that have experienced governmental corruption to some degree.
We cannot assure you that our internal control policies and procedures will protect us from improper acts committed by our employees or agents. Violations
of these laws, or allegations of such violations, could disrupt our business and have a material adverse effect on our business and operations.

In  addition,  the  DOJ  or  other  governmental  agencies  could  impose  a  broad  range  of  civil  and  criminal  sanctions  under  the  FCPA  and  other  laws  and
regulations  including,  but  not  limited  to,  injunctive  relief,  disgorgement,  fines,  penalties,  modifications  to  business  practices  including  the  termination  or
modification of existing business relationships, the imposition of compliance programs and the retention of a monitor to oversee compliance with the FCPA.
The imposition of any of these sanctions or remedial measures could have a material adverse effect on our business and results of operations.

Our proprietary data analytics engine may not operate properly, which could damage our reputation, give rise to claims against us or divert application of
our resources from other purposes, any of which could harm our business and operating results.

The  ECG  data  that  is  gathered  through  our  Zio  monitors  is  curated  by  algorithms  that  are  part  of  our  Zio  service  and  a  Zio  report  is  delivered  to  the
prescribing physician for diagnosis. The continuous development, maintenance and operation of our deep-learned backend data analytics engine is expensive
and complex, and may involve unforeseen difficulties including material performance problems, undetected defects or errors. We may encounter technical
obstacles, and it is possible that we may discover additional problems that prevent our proprietary algorithms from operating properly. We may also attempt to
develop new capabilities and incorporate new technologies, including artificial intelligence, which could impact our data analytics platform’s performance. If
our  data  analytics  platform  does  not  function  reliably  or  fails  to  meet  physician  or  payor  expectations  in  terms  of  performance,  physicians  may  stop
prescribing the Zio service and payors could attempt to cancel their contracts with us.

Any  unforeseen  difficulties  we  encounter  in  our  existing  or  new  software,  cloud-based  applications,  telecommunication  service  providers,  and  analytics
services, and any failure by us to identify and address them could result in loss of revenue or market share, diversion of development resources, injury to our
reputation and increased service and maintenance costs. Correction of defects or errors could prove to be impossible or impracticable. The costs incurred in
correcting any defects or errors may be substantial and could adversely affect our operating results.

Provision of the Zio service is dependent upon third-party vendors who are subject to disruptions, which could directly or indirectly harm our business
and operating results.

The analysis we perform to create the diagnostic report for the Zio service is dependent upon a recording made by each device, which requires the physical
return of the Zio monitor to one of our clinical centers. We predominantly rely on the U.S. Postal Service (“USPS”) to perform this delivery service. Delivery
of the Zio monitor to one of our clinical centers may be subject to disruption by natural disasters such as earthquake or flooding, labor disagreements or errors
on behalf of USPS staff, structural issues timely processing in some geographies, or other disruption to the USPS delivery infrastructure. Further, for the Zio
AT  monitor,  we  rely  on  the  provision  of  cellular  communication  services  for  the  timely  transmission  of  patient  information  and  reportable  events.  Once
received,  all  data  from  both  Zio  XT  and  AT  monitors  is  processed,  curated  and  reported  on  through  cloud-computing  resources.  The  reliability  of  these
communication and cloud services is also subject to natural disasters, labor disruptions, human error, and infrastructure failure.

Any of these disruptions may render it difficult or temporarily impossible for us to provide some or all of the Zio service, adversely affecting our operating
results, causing significant distraction for management, and negatively impacting our business reputation.

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Security  breaches,  loss  of  data  and  other  disruptions  could  compromise  sensitive  information  related  to  our  business  or  patients,  or  prevent  us  from
accessing critical information and expose us to liability, which could adversely affect our business and our reputation.

In the ordinary course of our business, we and our third-party billing and collections provider, XIFIN, collect, process, and store sensitive data, including
legally-protected  personally  identifiable  health  information  about  patients  in  the  United  States  and  in  the  United  Kingdom.  This  personally  identifiable
information may include, among other information, names, addresses, phone numbers, email addresses, payment account information, age, gender, and heart
rate  data.  We  also  process  and  store,  and  use  additional  third  parties  to  process  and  store,  sensitive  intellectual  property  and  other  proprietary  business
information, including that of our customers, payors and collaborative partners. Our patient information is encrypted but not de-identified. We manage and
maintain our applications and data utilizing a combination of on-site systems, managed data center systems and cloud-based computing center systems. These
applications and data encompass a wide variety of business critical information, including research and development information, commercial information
and business and financial information.

We are highly dependent on information technology networks and systems, including the internet and services hosted by Amazon Web Services and other
third party service providers, to securely process, transmit and store this critical information. Security breaches of this infrastructure, including physical or
electronic  break-ins,  computer  viruses,  attacks  by  hackers  and  similar  breaches,  can  create  system  disruptions,  shutdowns,  or  unauthorized  disclosure  or
modifications of confidential information involving patient health information to become publicly available. The secure processing, storage, maintenance and
transmission of this critical information are vital to our operations and business strategy, and we devote significant resources to protecting such information,
including executing Business Associates Agreements with applicable vendors. Although we take measures to protect sensitive information from unauthorized
access or disclosure, cyber-attacks are becoming more sophisticated and frequent, and our information technology and infrastructure, and that of XIFIN and
other  third  parties  we  utilize  to  process  or  store  data,  may  be  vulnerable  to  viruses  and  worms,  phishing  attacks,  denial-of-service  attacks,  physical  or
electronic break-ins, attacks by hackers, breaches due to employee error, malfeasance, or misuse, or similar disruptions from unauthorized tampering. While
we have implemented data privacy and security measures that we believe are compliant with applicable privacy laws and regulations, some confidential and
protected  health  information,  is  transmitted  to  us  by  third  parties,  who  may  not  implement  adequate  security  and  privacy  measures.  Further,  if  third  party
service providers that process or store data on our behalf experience security breaches or violate applicable laws, agreements, or our policies, such events may
also put our information at risk and could in turn have an adverse effect on our business.

A  security  breach  or  privacy  violation  that  leads  to  disclosure  or  modification  of,  or  prevents  access  to,  patient  information,  including  protected  health
information, could harm our reputation, compel us to comply with disparate state breach notification laws, require us to verify the correctness of database
contents and otherwise subject us to liability under laws that protect personal data, resulting in increased costs or loss of revenue. If we are unable to prevent
such security breaches or privacy violations or implement satisfactory remedial measures in a timely manner, the market perception of the effectiveness of our
security  measures  could  be  harmed,  our  operations  could  be  disrupted,  our  brand  could  be  adversely  affected,  demand  for  our  products  and  services  may
decrease,  we  may  be  unable  to  provide  the  Zio  service,  we  may  lose  sales  and  customers,  and  we  may  suffer  loss  of  reputation,  financial  loss  and  other
regulatory penalties because of lost or misappropriated information, including sensitive patient data. We may be required to expend significant capital and
financial  resources  to  invest  in  security  measures,  protect  against  such  threats  or  to  alleviate  problems  caused  by  breaches  in  security.  In  addition,  these
breaches and other inappropriate access can be difficult to detect, and any delay in identifying them may lead to increased harm. Although we have invested
in our systems and the protection of our data to reduce the risk of an intrusion or interruption, and we monitor our systems on an ongoing basis for any current
or potential threats, we can give no assurances that these measures and efforts will prevent all intrusions, interruptions, or breakdowns.

Because techniques used to obtain unauthorized access or to sabotage systems change frequently and generally are not recognized until launched, we may be
unable to anticipate these techniques or to implement adequate preventive measures.
In the event that patients or physicians authorize or enable third parties to access their data on our systems, we cannot ensure the complete integrity or security
of  such  data  in  our  systems  as  we  would  not  control  that  access.  Third  parties  may  also  attempt  to  fraudulently  induce  our  employees,  or  patients  or
physicians  who  use  our  technology,  into  disclosing  sensitive  information  such  as  user  names,  passwords  or  other  information.  Third  parties  may  also
otherwise  compromise  our  security  measures  in  order  to  gain  unauthorized  access  to  the  information  we  store.  This  could  result  in  significant  legal  and
financial exposure, a loss in confidence in the security of our service, interruptions or malfunctions in our service, and, ultimately, harm to our future business
prospects and revenue.

Any such breach or interruption of our systems, or those of XIFIN or any of our third party information technology partners, could compromise our networks
or data security processes and sensitive information could be inaccessible or could be accessed by unauthorized parties, publicly disclosed, lost or stolen. Any
such interruption in access, improper access, disclosure or other

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loss of information could result in legal claims or proceedings, liability under laws that protect the privacy of patient information, such as the federal Health
Insurance Portability and Accountability Act of 1996 (“HIPAA”), the General Data Protection Regulation, and the European Union Data Protection Directive,
and  regulatory  penalties.  Regardless  of  the  merits  of  any  such  claim  or  proceeding,  defending  it  could  be  costly  and  divert  management’s  attention  from
leading our business. Unauthorized access, loss or dissemination could also disrupt our operations, including our ability to perform our services, bill payors or
patients, process claims and appeals, provide customer assistance services, conduct research and development activities, collect, process and prepare company
financial information, provide information about our current and future solutions and engage in other patient and clinician education and outreach efforts. Any
such  breach  could  also  result  in  the  compromise  of  our  trade  secrets  and  other  proprietary  information,  which  could  adversely  affect  our  business  and
competitive position.

Depending on the nature of the information compromised, in the event of a data breach or other unauthorized access to or acquisition of our user data, we may
also  have  obligations  to  notify  users  about  the  incident  and  we  may  need  to  provide  some  form  of  remedy  for  the  individuals  affected  by  the  incident.  A
growing number of legislative and regulatory bodies have adopted consumer notification requirements in the event of unauthorized access to or acquisition of
certain types of personal data. Such breach notification laws continue to evolve and may be inconsistent from one jurisdiction to another. Complying with
these  obligations  could  cause  us  to  incur  substantial  costs  and  could  increase  negative  publicity  surrounding  any  incident  that  compromises  user  data.  In
addition,  the  interpretation  and  application  of  consumer,  health-related  and  data  protection  laws,  rules  and  regulations  in  the  United  States,  Europe  and
elsewhere are often uncertain, contradictory and in flux. It is possible that these laws, rules and regulations may be interpreted and applied in a manner that is
inconsistent with our practices or those of our distributors and partners. If we or these third parties are found to have violated such laws, rules or regulations,
it could result in government-imposed fines, orders requiring that we or these third parties change our or their practices, or criminal charges, which could
adversely  affect  our  business.  Complying  with  these  various  laws  could  cause  us  to  incur  substantial  costs  or  require  us  to  change  our  business  practices,
systems  and  compliance  procedures  in  a  manner  adverse  to  our  business.  In  addition,  California  recently  enacted  the  California  Consumer  Privacy  Act
(“CCPA”),  which  became  effective  on  January  1,  2020,  and  will,  among  other  things,  require  new  disclosures  to  California  consumers  and  afford  such
consumers new abilities to opt out of certain sales of personal information. It remains unclear how various provisions of the CCPA will be interpreted and
enforced. The effects of the CCPA are potentially significant and may require us to modify our data processing practices and policies and to incur substantial
costs and expenses in an effort to comply with this legislation.

The use, misuse or off-label use of the Zio service may result in injuries that lead to product liability suits, which could be costly to our business.

The use, misuse or off-label use of the Zio service may in the future result in outcomes and complications potentially leading to product liability claims. For
example, we are aware that physicians have prescribed the Zio service off-label for pediatric patients. We have also received and may in the future receive
product liability or other claims with respect to the Zio service, including claims related to skin irritation and alleged burns. In addition, if the Zio monitor is
defectively  designed,  manufactured  or  labeled,  contains  defective  components  or  is  misused,  we  may  become  subject  to  costly  litigation  initiated  by
physicians, or the hospitals and clinics where physicians prescribing our Zio service work, or their patients. Product liability claims are especially prevalent in
the medical device industry and could harm our reputation, divert management’s attention from our core business, be expensive to defend and may result in
sizable damage awards against us.

Although we maintain product liability insurance, we may not have sufficient insurance coverage for future product liability claims. We may not be able to
obtain  insurance  in  amounts  or  scope  sufficient  to  provide  us  with  adequate  coverage  against  all  potential  liabilities.  Any  product  liability  claims  brought
against us, with or without merit, could increase our product liability insurance rates or prevent us from securing continuing coverage, harm our reputation,
significantly increase our expenses, and reduce product sales. Product liability claims in excess of our insurance coverage would be paid out of cash reserves,
harming our financial condition and operating results.

Our forecasts of market growth may prove to be inaccurate, and even if the markets in which we compete achieve the forecasted growth, our business
may not increase at similar rates, if at all.

Growth forecasts are subject to significant uncertainty and are based on assumptions and estimates that may not prove to be accurate. Our forecasts relating
to, among other things, the expected growth in the ambulatory cardiac monitoring solutions market may prove to be inaccurate.

Our growth is subject to many factors, including whether the market for first-line ambulatory cardiac monitoring solutions continues to improve, the rate of
market acceptance of the Zio service as compared to the products of our competitors and our success in implementing our business strategies, each of which
is subject to many risks and uncertainties. If our Zio service

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works as anticipated to provide a correct first-line diagnosis, it may lead to a decrease in the amount of ambulatory cardiac monitoring prescriptions each year
in  the  United  States.  This  outcome  would  result  if  our  Zio  service  is  proven  to  produce  the  right  diagnosis  the  first  time,  thereby  reducing  the  need  for
additional testing. Accordingly, our forecasts of market opportunity should not be taken as indicative of our future growth.

We may acquire other companies or technologies, or enter into joint ventures or other strategic alliances, which could divert our management’s attention,
result in additional dilution to our stockholders and otherwise disrupt our operations and harm our operating results.

We may in the future seek to acquire or invest in businesses, applications or technologies that we believe could complement or expand our ambulatory cardiac
monitoring solutions portfolio, enhance our technical capabilities or otherwise offer growth opportunities. The pursuit of potential acquisitions may divert the
attention of management and cause us to incur various costs and expenses in identifying, investigating and pursuing suitable acquisitions, whether or not they
are consummated. We may not be able to identify desirable acquisition targets or be successful in entering into an agreement with any particular target or
obtain the expected benefits of any acquisition or investment. In addition, any of these transactions could be material to our financial condition and operating
results and expose us to many risks, including:

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disruption in our relationships with existing strategic partners or suppliers as a result of such a transaction;
unanticipated liabilities related to acquired companies;
difficulties integrating acquired personnel, technologies and operations into our existing business;
retention of key employees;
diversion of management time and focus from operating our business to management of strategic alliances or joint ventures or acquisition integration
challenges;
increases in our expenses and reductions in our cash available for operations and other uses; and
possible write-offs or impairment charges relating to acquired businesses.

To date, the growth of our operations has been largely organic, and we have limited experience in acquiring other businesses or technologies or entering into
joint ventures or strategic alliances. Acquisitions, joint ventures or strategic alliances could also result in dilutive issuances of equity securities, the use of our
available cash, or the incurrence of debt, which could harm our operating results. In addition, if an acquired business, joint venture or strategic alliance fails to
materialize or fails to meet our expectations, our operating results, business and financial condition may suffer.

Consolidation of commercial payors could result in payors eliminating coverage or reducing reimbursement rates for our Zio service.

When payors combine their operations, the combined company may elect to reimburse our Zio service at the lowest rate paid by any of the participants in the
consolidation or use its increased size to negotiate reduced rates. If one of the payors participating in the consolidation does not reimburse for the Zio service
at all, the combined company may elect not to reimburse for the Zio service, which would adversely impact our operating results. While attempts by Aetna
Inc. to acquire Humana Inc. and Anthem Inc. to acquire Cigna Corp. have been largely abandoned due to antitrust challenges by the DOJ, it is possible that
these or other payor consolidations may occur in the future.

Our ability to utilize our net operating loss carryovers may be limited.

As of December 31, 2019, we had federal and state net operating loss carryforwards (“NOLs”) of $259.9 million and $153.8 million, respectively, which if
not utilized will begin to expire in 2027 for federal purposes and 2019 for state purposes. We may use these NOLs to offset against taxable income for U.S.
federal and state income tax purposes. However, Section 382 of the Internal Revenue Code, as amended, may limit the NOLs we may use in any year for U.S.
federal income tax purposes in the event of certain changes in ownership of our company. A Section 382 “ownership change” generally occurs if one or more
stockholders or groups of stockholders who own at least 5% of a company’s stock increase their ownership by more than 50 percentage points (by value) over
their lowest ownership percentage within a rolling three year period. Similar rules may apply under state tax laws. Future issuances or sales of our stock,
including certain transactions involving our stock that are outside of our control, could cause an “ownership change.” If an “ownership change” has occurred
in the past or occurs in the future, Section 382 would impose an annual limit on the amount of pre-ownership change NOLs and other tax attributes we can
use to reduce our taxable income, potentially increasing and accelerating our liability for income taxes, and also potentially causing those tax attributes to
expire unused. As of December 31, 2019, a Section 382 study has not been performed. Any limitation on using NOLs could, depending on the extent of such
limitation and the NOLs previously used, result in our retaining less cash after payment of U.S. federal and state income taxes during any year in which we
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we would be entitled to retain if such NOLs were available as an offset against such income for U.S. federal and state income tax reporting purposes, which
could adversely impact our operating results.

We have identified material weaknesses in our internal control over financial reporting which could, if not remediated, result in material misstatements in
our financial statements.

We are responsible for establishing and maintaining adequate internal control over our financial reporting, as defined in Rule 13a-15(f) under the Securities
Exchange Act. As disclosed below in Item 9A of our Form 10-K filed with the SEC on March 4, 2019, we identified material weaknesses in our internal
control over financial reporting. A material weakness is defined as a deficiency, or combination of deficiencies, in internal control over financial reporting,
such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a
timely basis. As a result of these material weaknesses, we concluded that our internal control over financial reporting was not effective based on criteria set
forth by the Committee of Sponsoring Organization of the Treadway Commission in Internal Control-An Integrated Framework (2013).

To  implement  remedial  measures  as  disclosed  in  Item  9A  of  our  Form  10-K  filed  with  the  SEC  on  March  4,  2019,  we  may  need  to  commit  additional
resources, hire additional staff, and provide additional management oversight. If our remedial measures are insufficient to address the material weaknesses, or
if  additional  material  weaknesses  or  significant  deficiencies  in  our  internal  control  over  financial  reporting  are  discovered  or  occur  in  the  future,  our
consolidated financial statements may contain material misstatements, and we could be required to restate our financial results. In addition, if we are unable to
successfully remediate these material weaknesses and if we are unable to produce accurate and timely financial statements, our stock price may be adversely
affected.

Risks Related to Our Intellectual Property

We may become a party to intellectual property litigation or administrative proceedings that could be costly and could interfere with our ability to provide
the Zio service.

The medical device industry has been characterized by extensive litigation regarding patents, trademarks, trade secrets, and other intellectual property rights,
and  companies  in  the  industry  have  used  intellectual  property  litigation  to  gain  a  competitive  advantage.  It  is  possible  that  U.S.  and  foreign  patents  and
pending  patent  applications  or  trademarks  controlled  by  third  parties,  especially  those  held  by  our  competitors,  may  be  alleged  to  cover  our  products  or
services, or that we may be accused of misappropriating third parties’ trade secrets. Additionally, our products include hardware and software components
that we purchase from vendors, and may include design components that are outside of our direct control. Our competitors, many of which have substantially
greater resources and have made substantial investments in patent portfolios, trade secrets, trademarks, and competing technologies, may have applied for or
obtained, or may in the future apply for or obtain, patents or trademarks that will prevent, limit or otherwise interfere with our ability to make, use, sell and/or
export  our  products  and  services  or  to  use  product  names.  Moreover,  in  recent  years,  individuals  and  groups  that  are  non-practicing  entities,  commonly
referred to as “patent trolls,” have purchased patents or otherwise obtained rights to and other intellectual property assets for the purpose of making claims of
infringement in order to extract settlements. From time to time, we may receive threatening letters, notices or “invitations to license,” or may be the subject of
claims  that  our  products  and  business  operations  infringe  or  violate  the  intellectual  property  rights  of  others.  The  defense  of  these  matters  can  be  time-
consuming, costly to defend in litigation, divert management’s attention and resources, damage our reputation and brand, and cause us to incur significant
expenses or make substantial payments to satisfy judgments or settle claims. Vendors from which we purchase hardware or software may not indemnify or
defend us in the event that such hardware or software is accused of infringing a third-party’s patent or trademark or of misappropriating a third-party’s trade
secrets.

Further, if such patents, trademarks, or trade secrets are successfully asserted against us, this may harm our business and result in injunctions preventing us
from selling our products, license fees, damages and the payment of attorney’s fees and court costs. In addition, if we are found to have willfully infringed
third-party patents or trademarks or to have misappropriated trade secrets, we could be required to pay treble damages in addition to other penalties. Although
patent, trademark, trade secret, and other intellectual property disputes in the medical device and services area have often been settled through licensing or
similar arrangements, costs associated with such arrangements may be substantial and could include ongoing royalties. We may be unable to obtain necessary
licenses on satisfactory terms, if at all. If we do not obtain necessary licenses, we may not be able to redesign our Zio monitors or our Zio service to avoid
infringement and our product development efforts may be negatively affected as a result.

Similarly, interference or derivation proceedings provoked by third parties or brought by the U.S. Patent and Trademark Office (“USPTO”) may be necessary
to determine priority with respect to our patents, patent applications, trademarks or trademark

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applications. We may also become involved in other proceedings, such as reexamination, inter partes review, derivation or opposition proceedings before the
USPTO or other jurisdictional body relating to our intellectual property rights or the intellectual property rights of others. Adverse determinations in a judicial
or administrative proceeding or failure to obtain necessary licenses could prevent us from manufacturing the Zio monitors and selling the Zio service or using
product names, which would have a significant adverse impact on our business.

Additionally,  we  may  need  to  commence  proceedings  against  others  to  enforce  our  patents  or  trademarks,  to  protect  our  trade  secrets  or  know  how,  or  to
determine the enforceability, scope and validity of the proprietary rights of others. These proceedings would result in substantial expense to us and significant
diversion  of  effort  by  our  technical  and  management  personnel.  We  may  not  prevail  in  any  lawsuits  that  we  initiate  and  the  damages  or  other  remedies
awarded, if any, may not be commercially meaningful. We may not be able to stop a competitor from marketing and selling products that are the same or
similar to our products and services or from using product or service names that are the same or similar to ours, and our business may be harmed as a result.

We use certain open source software in the infrastructure supporting the Zio service. Licensees of open source software may be required to make public and
use certain source code, to license proprietary software for free or to make certain derivative works available to others. As a result, we may face claims from
companies  that  incorporate  open  source  software  into  their  products  or  from  open  source  licensors,  claiming  ownership  of,  or  demanding  release  of,  the
source  code,  the  open  source  software  or  derivative  works  that  were  developed  using  such  software,  or  otherwise  seeking  to  enforce  the  terms  of  the
applicable  open  source  license.  These  claims  could  result  in  litigation  and  could  require  us  to  cease  offering  the  Zio  service  unless  and  until  we  can  re-
engineer it to avoid infringement. This re-engineering process could require significant additional research and development resources, and we may not be
able  to  complete  it  successfully.  While  we  monitor  and  control  the  use  of  open  source  software  in  the  Zio  service  and  in  any  third  party  software  that  is
incorporated  into  the  Zio  service,  and  we  try  to  ensure  that  no  open  source  software  is  used  in  such  a  way  as  to  require  us  to  disclose  the  source  code
underlying the Zio service, there can be no guarantee that such use could not inadvertently occur. These risks could be difficult to eliminate or manage, and, if
not addressed, could harm our business, intellectual property protection, financial condition and operating results.

Intellectual property rights may not provide adequate protection, which may permit third parties to compete against us more effectively.

In order to remain competitive, we must develop and maintain protection of the proprietary aspects of our technologies. We rely on a combination of patents,
copyrights, trademarks, trade secret laws and confidentiality and invention assignment agreements with employees and third parties to protect our intellectual
property rights. As of December 31, 2019, we owned, or retained exclusive license to, seventeen issued U.S. patents, the earliest of which will expire in 2028.
As of December 31, 2019, we also owned, or retained an exclusive license to, six issued patents from the Japanese Patent Office, two issued patents from
each  of  the  Australian,  Canadian  and  European  Patent  Offices,  and  one  issued  patent  from  the  Korean  Patent  Office.  The  earliest  expiration  date  of  these
international patents is 2027. As of December 31, 2019, we had nineteen pending patent applications globally, including three in the United States, five in the
European Patent Office, four in Japan, two in each of Korea and Canada, and one in each of Australia, China and India. Our patents and patent applications
are directed to covering key aspects of the design, manufacture and use of the Zio monitor and the Zio service.

We rely, in part, on our ability to obtain and maintain patent protection for our proprietary products and processes. The process of applying for and obtaining a
patent is expensive, time-consuming and complex, and we may not be able to file, prosecute, maintain, enforce or license all necessary or desirable patent
applications at a reasonable cost, in a timely manner, or in all jurisdictions where protection may be commercially advantageous, or we may not be able to
protect our proprietary rights at all. Despite our efforts to protect our proprietary rights, unauthorized parties may be able to obtain and use information that
we regard as proprietary. In addition, the issuance of a patent does not ensure that it is valid or enforceable, so even if we obtain patents, they may not be valid
or  enforceable  against  third  parties.  Our  patent  applications  may  not  result  in  issued  patents  and  our  patents  may  not  be  sufficiently  broad  to  protect  our
technology. Issued international patents may carry a requirement to “work” a patent in the applicable geography; failure to do so could lead to loss of the
patent or the requirement to accept licensing terms, both of which would be favorable to our competitors. Furthermore, the issuance of a patent does not give
us the right to practice the patented invention. Third parties may have blocking patents that could prevent us from marketing our own products and practicing
our own technology. Alternatively, third parties may seek approval to market their own products similar to or otherwise competitive with our products. In
these  circumstances,  we  may  need  to  defend  and/or  assert  our  patents,  including  by  filing  lawsuits  alleging  patent  infringement.  In  any  of  these  types  of
proceedings,  a  court  or  agency  with  jurisdiction  may  find  our  patents  invalid  or  unenforceable;  competitors  may  then  be  able  to  market  products  and  use
manufacturing and analytical processes that are substantially similar to ours. Even if we have valid and enforceable patents, these patents still may not provide
protection  against  competing  products  or  processes  sufficient  to  achieve  our  business  objectives.  Litigation  is  time-consuming  and  expensive  and  would
divert our resources.

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If  we  are  unable  to  protect  the  confidentiality  of  our  trade  secrets  and  other  proprietary  information,  our  business  and  competitive  position  may  be
harmed.

We rely heavily on trade secrets as well as invention assignment and confidentiality provisions that we have in contracts with our employees, consultants,
collaborators and others to protect our algorithms and other aspects of our Zio service. We may not be able to prevent the unauthorized disclosure or use of
our technical knowledge or other trade secrets by consultants, vendors or former or current employees, despite the existence generally of these confidentiality
agreements and other contractual restrictions. These agreements may not provide meaningful protection for our trade secrets, know-how, or other proprietary
information in the event of any unauthorized use, misappropriation, or disclosure of such trade secrets, know-how, or other proprietary information. There can
be no assurance that employees, consultants, vendors and clients have executed such agreements or have not breached or will not breach their agreements
with  us,  that  we  will  have  adequate  remedies  for  any  breach,  or  that  our  trade  secrets  will  not  otherwise  become  known  or  independently  developed  by
competitors.  Despite  the  protections  we  do  place  on  our  intellectual  property,  monitoring  unauthorized  use  and  disclosure  of  our  intellectual  property  is
difficult, and we do not know whether the steps we have taken to protect our intellectual property will be adequate. In addition, the laws of many foreign
countries will not protect our intellectual property rights to the same extent as the laws of the United States. Consequently, we may be unable to prevent our
proprietary technology from being exploited abroad, which could affect our ability to expand to international markets or require costly efforts to protect our
technology.

We may also employ individuals who were previously or are concurrently employed at research institutions or other medical device companies, including our
competitors or potential competitors. We may be subject to claims that these employees, or we, have inadvertently or otherwise used or disclosed trade secrets
or  other  proprietary  information  of  their  former  or  concurrent  employers,  or  that  patents  and  applications  we  have  filed  to  protect  inventions  of  these
employees, even those related to one or more of our products, are rightfully owned by their former or concurrent employer. Litigation may be necessary to
defend against these claims. Even if we are successful in defending against these claims, litigation could result in substantial costs and be a distraction to
management.

To  the  extent  our  intellectual  property  protection  is  incomplete,  we  are  exposed  to  a  greater  risk  of  direct  competition.  A  third  party  could,  without
authorization, copy or otherwise obtain and use our products or technology, or develop similar technology. Our competitors could purchase our products and
attempt to replicate some or all of the competitive advantages we derive from our development efforts or design around our protected technology. Our failure
to  secure,  protect  and  enforce  our  intellectual  property  rights  could  substantially  harm  the  value  of  our  Zio  service,  brand  and  business.  The  theft  or
unauthorized use or publication of our trade secrets and other confidential business information could reduce the differentiation of our products and harm our
business,  the  value  of  our  investment  in  development  or  business  acquisitions  could  be  reduced  and  third  parties  might  make  claims  against  us  related  to
losses of their confidential or proprietary information. Any of the foregoing could materially and adversely affect our business.

Further, it is possible that others will independently develop the same or similar technology or otherwise obtain access to our unpatented technology, and in
such cases we could not assert any trade secret rights against such parties. Costly and time-consuming litigation could be necessary to enforce and determine
the scope of our trade secret rights and related confidentiality and nondisclosure provisions. If we fail to obtain or maintain trade secret protection, or if our
competitors obtain our trade secrets or independently develop technology similar to ours or competing technologies, our competitive market position could be
materially  and  adversely  affected.  In  addition,  some  courts  inside  and  outside  the  United  States  are  less  willing  or  unwilling  to  protect  trade  secrets,  and
agreement terms that address non-competition are difficult to enforce in many jurisdictions, and might not be enforceable in certain cases.

If our trademarks and tradenames are not adequately protected, then we may not be able to build name recognition in our markets and our business may
be adversely affected.

We rely on trademarks, service marks, trade names and brand names, such as our registered trademark “ZIO,” to distinguish our products from the products of
our competitors, and have registered or applied to register these trademarks. We cannot assure you that our trademark applications will be approved. During
trademark registration proceedings, we may receive rejections. Although we are given an opportunity to respond to those rejections, we may be unable to
overcome such rejections. In addition, in proceedings before the USPTO and in proceedings before comparable agencies in many foreign jurisdictions, third
parties are given an opportunity to oppose pending trademark applications and to seek to cancel registered trademarks. Opposition or cancellation proceedings
may be filed against our trademarks, and our trademarks may not survive such proceedings. In the event that our trademarks are successfully challenged, we
could be forced to rebrand our products, which could result in loss of brand recognition and could require us to devote resources towards advertising and
marketing new brands. Further, we cannot assure you that competitors will not infringe our trademarks or that we will have adequate resources

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to  enforce  our  trademarks.  Additionally,  we  are  aware  of  at  least  one  third  party  that  has  registered  the  “IRHYTHM”  mark  in  the  European  Union  in
connection with computer software for controlling and managing patient medical information, heart rate monitors, and heart rate monitors to be worn during
moderate exercise, among other uses. We and the third party are involved in adversary proceedings before the Trademark Office in the European Union, and
those proceedings could impact our ability to obtain a European Union trade mark registration for the “IRHYTHM” mark (although we already own many
national registrations for IRHYTHM in Europe).

Changes in patent law could diminish the value of patents in general, thereby impairing our ability to protect our existing and future products.

Recent patent reform legislation could increase the uncertainties and costs surrounding the prosecution of patent applications and the enforcement or defense
of  issued  patents.  In  2011,  the  Leahy-Smith  America  Invents  Act  (“Leahy-Smith  Act”)  was  signed  into  law.  The  Leahy-Smith  Act  includes  a  number  of
significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted and also may affect patent litigation.
These also include provisions that switched the United States from a “first-to-invent” system to a “first-to-file” system, allow third-party submission of prior
art  to  the  USPTO  during  patent  prosecution  and  set  forth  additional  procedures  to  attack  the  validity  of  a  patent  by  the  USPTO,  administered  post  grant
proceedings. Under a first-to-file system, assuming the other requirements for patentability are met, the first inventor to file a patent application generally will
be entitled to the patent on an invention regardless of whether another inventor had made the invention earlier. Under the new post grant provisions of the
Leahy-Smith Act, the USPTO introduced procedures that provide additional administrative pathways for third parties to challenge issued patents. Inter partes
review (“IPR”) is one of these procedures. The number of IPR challenges filed is increasing, and in many cases, the USPTO is canceling or significantly
narrowing issued patent claims. Accordingly, even if a patent is granted by the USPTO, there is risk that it may not withstand an IPR challenge. Accordingly,
it  is  not  clear  what,  if  any,  impact  the  Leahy-Smith  Act  will  have  on  the  operation  of  our  business.  The  Leahy-Smith  Act  and  its  implementation  could
increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which
could have a material adverse effect on our business, financial condition, results of operations and prospects.

In  addition,  patent  reform  legislation  may  pass  in  the  future  that  could  lead  to  additional  uncertainties  and  increased  costs  surrounding  the  prosecution,
enforcement and defense of our patents and applications. Furthermore, the U.S. Supreme Court and the U.S. Court of Appeals for the Federal Circuit have
made,  and  will  likely  continue  to  make,  changes  in  how  the  patent  laws  of  the  United  States  are  interpreted.  Recent  case  law  has  increased  uncertainty
regarding the availability of patent protection for certain technologies and the costs associated with obtaining patent protection for those technologies. For
example,  the  U.S.  Supreme  Court  has  ruled  on  several  patent  cases  in  recent  years,  either  narrowing  the  scope  of  patent  protection  available  in  certain
circumstances or weakening the rights of patent owners in certain situations. In particular, the 2014 decision by the U.S. Supreme Court in Alice Corp. v. CLS
Bank International  has  increased  the  difficulty  of  obtaining  new  software  patents  and  enforcing  existing  software  patents.  Similarly,  foreign  courts  have
made, and will likely continue to make, changes in how the patent laws in their respective jurisdictions are interpreted. We cannot predict future changes in
the  interpretation  of  patent  laws  or  changes  to  patent  laws  that  might  be  enacted  into  law  by  U.S.  and  foreign  legislative  bodies.  Those  changes  may
materially affect our patents or patent applications and our ability to obtain additional patent protection in the future.

Risks Related to Government Regulation

Changes in the regulatory environment may constrain or require us to restructure our operations, which may harm our revenue and operating results.

Healthcare laws and regulations change frequently and may change significantly in the future. We may not be able to adapt our operations to address every
new regulation, and new regulations may adversely affect our business. We cannot assure you that a review of our business by courts or regulatory authorities
would not result in a determination that adversely affects our revenue and operating results, or that the healthcare regulatory environment will not change in a
way that restricts our operations. In addition, there is risk that the U.S. Congress may implement changes in laws and regulations governing healthcare service
providers, including measures to control costs, or reductions in reimbursement levels, which may adversely affect our business and results of operations.

Government payors, such as CMS, as well as insurers, have increased their efforts to control the cost, utilization and delivery of healthcare services. From
time  to  time,  the  U.S.  Congress  has  considered  and  implemented  changes  in  the  CMS  fee  schedules  in  conjunction  with  budgetary  legislation.  Further
reductions  of  reimbursement  by  CMS  for  services  or  changes  in  policy  regarding  coverage  of  tests  or  other  requirements  for  payment,  such  as  prior
authorization or a physician or qualified

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practitioner’s signature on test requisitions, may be implemented from time to time. Reductions in the reimbursement rates and changes in payment policies
of other third-party payors may occur as well. Similar changes in the past have resulted in reduced payments as well as added costs and have added more
complex regulatory and administrative requirements. Further changes in federal, state, local and third-party payor regulations or policies may have a material
adverse impact on our business. Actions by agencies regulating insurance or changes in other laws, regulations, or policies may also have a material adverse
effect on our business.

If we fail to comply with healthcare and other governmental regulations, we could face substantial penalties and our business, results of operations and
financial condition could be adversely affected.

The products and services we offer are highly regulated, and there can be no assurance that the regulatory environment in which we operate will not change
significantly and adversely in the future. Our arrangements with physicians, hospitals and clinics may expose us to broadly applicable fraud and abuse and
other  laws  and  regulations  that  may  restrict  the  financial  arrangements  and  relationships  through  which  we  market,  sell  and  distribute  our  products  and
services.  Our  employees,  consultants,  and  commercial  partners  may  engage  in  misconduct  or  other  improper  activities,  including  non-compliance  with
regulatory  standards  and  requirements.  Federal  and  state  healthcare  laws  and  regulations  that  may  affect  our  ability  to  conduct  business,  include,  without
limitation:

•

•

•

•

•
•

federal and state laws and regulations regarding billing and claims payment applicable to our Zio service and regulatory agencies enforcing those
laws and regulations;
the federal Anti-Kickback Statute, which prohibits, among other things, any person from knowingly and willfully offering, soliciting, receiving or
providing  remuneration,  directly  or  indirectly,  in  exchange  for  or  to  induce  either  the  referral  of  an  individual  for,  or  the  purchase,  order  or
recommendation of, any good or service for which payment may be made under federal healthcare programs, such as the CMS programs;
the federal False Claims Act, which prohibits, among other things, individuals or entities from knowingly presenting, or causing to be presented,
false claims, or knowingly using false statements, to obtain payment from the federal government;
federal criminal laws that prohibit executing a scheme to defraud any healthcare benefit program or making false statements relating to healthcare
matters;
the FCPA, the U.K. Bribery Act of 2010, and other local anti-corruption laws that apply to our international activities;
the federal Physician Payment Sunshine Act, or Open Payments, created under the Affordable Care Act, and its implementing regulations, which
requires manufacturers of drugs, medical devices, biologicals and medical supplies for which payment is available under Medicare, Medicaid, or the
Children’s Health Insurance Program to report annually to the U.S. Department of Health and Human Services, information related to payments or
other transfers of value made to licensed physicians and teaching hospitals, as well as ownership and investment interests held by physicians and
their immediate family members;

• HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, and its implementing regulations, which impose
certain requirements relating to the privacy, security and transmission of individually identifiable health information; HIPAA also created criminal
liability for knowingly and willfully falsifying or concealing a material fact or making a materially false statement in connection with the delivery of
or payment for healthcare benefits, items or services;
the GDPR, which replaces the 1995 Data Protection Directive known as Directive 95/46/EC;
the federal physician self-referral prohibition, commonly known as the Stark Law; and
state law equivalents of each of the above federal laws, such as anti-kickback and false claims laws which may apply to items or services reimbursed
by  any  third-party  payor,  including  commercial  insurers,  and  state  and  foreign  laws  governing  the  privacy  and  security  of  health  information  in
certain  circumstances,  many  of  which  differ  from  each  other  in  significant  ways  and  often  are  not  preempted  by  HIPAA,  thus  complicating
compliance efforts.

•
•
•

The Affordable Care Act was enacted in 2010. The Affordable Care Act, among other things, amends the intent requirement of the federal Anti-Kickback
Statute and criminal healthcare fraud statutes. A person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it. In
addition, the Affordable Care Act provides that the government may assert that a claim including items or services resulting from a violation of the federal
Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the False Claims Act.

Because of the breadth of these laws and the narrowness of available statutory and regulatory exemptions, it is possible that some of our activities could be
subject to challenge under one or more of such laws. Any action brought against us for violations of these laws or regulations, even successfully defended,
could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business. We may be subject to private “qui
tam” actions brought by individual whistleblowers on behalf of the federal or state governments, with potential liability under the federal False Claims

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Act including mandatory treble damages and significant per-claim penalties, which were increased to $11,181 to $22,363 per false claim in 2018.

Although we have adopted policies and procedures designed to comply with these laws and regulations and conduct internal reviews of our compliance with
these laws, our compliance is also subject to governmental review. The growth of our business and sales organization and our expansion outside of the United
States may increase the potential of violating these laws or our internal policies and procedures. The risk of our being found in violation of these or other laws
and regulations is further increased by the fact that many have not been fully interpreted by the regulatory authorities or the courts, and their provisions are
open to a variety of interpretations. Any action brought against us for violation of these or other laws or regulations, even if we successfully defend against it,
could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business. If our operations are found to be
in  violation  of  any  of  the  federal,  state  and  foreign  laws  described  above  or  any  other  current  or  future  fraud  and  abuse  or  other  healthcare  laws  and
regulations that apply to us, we may be subject to penalties, including significant criminal, civil, and administrative penalties, damages, fines, imprisonment,
for  individuals,  exclusion  from  participation  in  government  programs,  such  as  Medicare  and  Medicaid,  and  we  could  be  required  to  curtail  or  cease  our
operations. Any of the foregoing consequences could seriously harm our business and our financial results.

If we fail to obtain and maintain necessary regulatory clearances or approvals for the Zio monitors and Zio service, or if clearances or approvals for
future products and indications are delayed or not issued, our commercial operations would be harmed.

The  Zio  monitors  and  Zio  service  are  subject  to  extensive  regulation  by  the  FDA  in  the  United  States  and  by  our  Notified  Body  in  the  European  Union.
Government regulations specific to medical devices are wide ranging and govern, among other things:

•
•
•
•
•
•
•

product design, development, manufacture, and release;
laboratory, preclinical and clinical testing, labeling, packaging, storage and distribution;
premarketing clearance or approval;
service operations
record keeping;
product marketing, promotion and advertising, sales and distribution; and
post-marketing surveillance, including reporting of deaths or serious injuries and recalls and correction and removals.

Before a new medical device or service, or a new intended use for an existing product or service, can be marketed in the United States, a company must first
submit and receive either 510(k) clearance or premarketing approval from the FDA, unless an exemption applies. Either process can be expensive, lengthy
and unpredictable. We may not be able to obtain the necessary clearances or approvals or may be unduly delayed in doing so, which could harm our business.
Furthermore, even if we are granted regulatory clearances or approvals, they may include significant limitations on the indicated uses for the product, which
may  limit  the  market  for  the  product.  Although  we  have  obtained  510(k)  clearance  to  market  the  Zio  monitors  and  the  Zio  service,  our  clearance  can  be
revoked if safety or efficacy problems develop.

In  addition,  we  are  required  to  file  various  reports  with  the  FDA,  and  European  regulators,  including  reports  required  by  the  medical  device  reporting
regulations (“MDRs”) that require that we report to the regulatory authorities if our Zio service may have caused or contributed to a death or serious injury or
malfunctioned in a way that would likely cause or contribute to a death or serious injury if the malfunction were to recur. If these reports are not filed in a
timely manner, regulators may impose sanctions and we may be subject to product liability or regulatory enforcement actions, all of which could harm our
business.

If  we  initiate  a  correction  or  removal  for  our  Zio  service  to  reduce  a  risk  to  health  posed  by  the  Zio  service,  we  would  be  required  to  submit  a  publicly
available Correction and Removal report to the FDA and, in many cases, similar reports to other regulatory agencies. This report could be classified by the
FDA as a device recall which could lead to increased scrutiny by the FDA, other international regulatory agencies and our customers regarding the quality
and safety of our Zio service. Furthermore, the submission of these reports could be used by competitors against us and cause physicians to delay or cancel
prescriptions, which could harm our reputation.

If we assess a potential quality issue or complaint as not requiring either field action or notification, respectively, regulators may review documentation of that
decision during a subsequent audit. If regulators disagree with our decision, or take issue with either our investigation process or the resulting documentation,
regulatory agencies may impose sanctions and we may be subject to regulatory enforcement actions, including warning letters, all of which could harm our
business.

The FDA and the Federal Trade Commission (“FTC”) also regulate the advertising and promotion of our products and services to ensure that the claims we
make are consistent with our regulatory clearances, that there is adequate and reasonable data to

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substantiate  the  claims  and  that  our  promotional  labeling  and  advertising  is  neither  false  nor  misleading.  If  the  FDA  or  FTC  determines  that  any  of  our
advertising or promotional claims are misleading, not substantiated or not permissible, we may be subject to enforcement actions, including warning letters,
and we may be required to revise our promotional claims and make other corrections or restitutions.

The FDA and state and international authorities have broad enforcement powers. Our failure to comply with applicable regulatory requirements could result
in enforcement action by any such agency, which may include any of the following sanctions:

•
•
•
•

adverse publicity, warning letters, fines, injunctions, consent decrees and civil penalties;
repair, replacement, refunds, recall or seizure of our products;
operating restrictions, partial suspension or total shutdown of production;
denial of our requests for regulatory clearance or premarket approval of new products or services, new intended uses or modifications to existing
products or services;

• withdrawal of regulatory clearance or premarket approvals that have already been granted;
•

criminal prosecution.

If any of these events were to occur, our business and financial condition could be harmed.

Material modifications to the Zio monitors, labelling of the Zio monitors, or Zio service may require new 510(k) clearances, CE Marks or other premarket
approvals or may require us to recall or cease marketing our products and services until clearances are obtained.

Material modifications to the intended use or technological characteristics of the Zio monitors or Zio service will require new 510(k) clearances, premarket
approvals or CE Mark grants, or require us to recall or cease marketing the modified devices until these clearances or approvals are obtained. Based on FDA
published guidelines, the FDA requires device manufacturers to initially make and document a determination of whether or not a modification requires a new
approval,  supplement  or  clearance;  however,  the  FDA  can  review  a  manufacturer’s  decision.  Any  modification  to  an  FDA  cleared  device  or  service  that
would significantly affect its safety or efficacy or that would constitute a major change in its intended use would require a new 510(k) clearance or possibly a
premarket approval. We may not be able to obtain additional 510(k) clearances or premarket approvals for new products or for modifications to, or additional
indications  for,  the  Zio  monitors  or  Zio  service  in  a  timely  fashion,  or  at  all.  Delays  in  obtaining  required  future  clearances  would  harm  our  ability  to
introduce new or enhanced products in a timely manner, which in turn would harm our future growth. We have made modifications to the Zio monitors and
Zio service in the past that we believe do not require additional clearances or approvals, and we may make additional modifications in the future. If the FDA
or an EU Notified Body disagrees and requires new clearances or approvals for any of these modifications, we may be required to recall and to stop selling or
marketing the Zio monitors and Zio service as modified, which could harm our operating results and require us to redesign our products or services. In these
circumstances, we may be subject to significant enforcement actions.

If  we  or  our  suppliers  fail  to  comply  with  the  FDA’s  QSR  or  the  European  Union’s  Medical  Device  Directive,  our  manufacturing  or  distribution
operations could be delayed or shut down and our revenue could suffer.

Our manufacturing and design processes and those of our third-party suppliers are required to comply with the FDA’s Quality System Regulation (“QSR”)
and the EU’s Medical Device Directive (“MDD”), through May 2020, after which time compliance with the Medical Device Regulation (“MDR”) will be
required. All of these regulations cover procedures and documentation requirements for the design, testing, production, control, quality assurance, labeling,
packaging,  storage  and  shipping  of  Zio  monitors.  We  are  also  subject  to  similar  state  requirements  and  licenses,  and  to  ongoing  ISO  compliance  in  all
operations, including design, manufacturing, and service, to maintain our CE Mark. In addition, we must engage in extensive recordkeeping and reporting and
must  make  available  our  facilities  and  records  for  periodic  unannounced  inspections  by  governmental  agencies,  including  the  FDA,  state  authorities,  EU
Notified  Bodies  and  comparable  agencies  in  other  countries.  If  we  fail  a  regulatory  inspection,  our  operations  could  be  disrupted  and  our  manufacturing
interrupted. Failure to take adequate corrective action in response to an adverse regulatory inspection could result in, among other things, a shutdown of our
manufacturing  or  product  distribution  operations,  significant  fines,  suspension  of  marketing  clearances  and  approvals,  seizures  or  recalls  of  our  device,
operating  restrictions  and  criminal  prosecutions,  any  of  which  would  cause  our  business  to  suffer.  Furthermore,  our  key  component  suppliers  may  not
currently be or may not continue to be in compliance with applicable regulatory requirements, which may result in manufacturing delays for our product and
cause our revenue to decline.

We are registered with the FDA as a medical device specifications developer and manufacturer. The FDA has broad post-market and regulatory enforcement
powers. We are subject to unannounced inspections by the FDA and the Food and Drug

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Branch of the California Department of Public Health (“CDPH”) to determine our compliance with the QSR and other regulations at both our design and
manufacturing facilities, and these inspections may include the manufacturing facilities of our suppliers. Our design facilities in San Francisco, California
were most recently audited by the FDA in June 2016 and no formal observations resulted. The most recent FDA audit of our manufacturing facility occurred
in October 2018 and no formal observations resulted. No additional follow up with the FDA was required and we believe that we are in compliance, in all
material respects, with the QSR.

We  are  also  registered  with  the  EU  as  a  medical  device  developer,  manufacturer  and  service  operator  through  the  National  Standard  Authority  of  Ireland
(“NSAI”)  our  European  Notified  Body.  Most  recently,  the  NSAI  completed  an  ISO  13485  surveillance  audit  of  our  design,  manufacturing  and  service
operations in June 2019 and we believe that we are in compliance, in all material respects, with the MDD.

We can provide no assurance that we will continue to remain in compliance with the QSR or MDD, or to the European Union's new MDRs, which will be
required to comply with by May 2020. If the FDA, CDPH or NSAI inspect any of our facilities and discover compliance problems, we may have to cease
manufacturing  and  product  distribution  until  we  can  take  the  appropriate  remedial  steps  to  correct  the  audit  findings.  Taking  corrective  action  may  be
expensive, time consuming and a distraction for management and if we experience a delay at our manufacturing facility we may be unable to produce Zio
monitors, which would harm our business.

Zio monitors may in the future be subject to product recalls that could harm our reputation.

The FDA and similar governmental authorities in other countries have the authority to require the recall of commercialized products in the event of material
regulatory deficiencies or defects in design or manufacture. A government mandated or voluntary recall by us could occur as a result of component failures,
manufacturing  errors  or  design  or  labeling  defects.  Recalls  of  Zio  monitors  would  divert  managerial  attention,  be  expensive,  harm  our  reputation  with
customers and harm our financial condition and results of operations. A recall announcement would also negatively affect our stock price.

Healthcare reform measures could hinder or prevent the Zio service’s commercial success.

In the United States, there have been, and we expect there will continue to be, a number of legislative and regulatory changes to the healthcare system in ways
that could harm our future revenues and profitability and the demand for the Zio service. Federal and state lawmakers regularly propose and, at times, enact
legislation that would result in significant changes to the healthcare system, some of which are intended to contain or reduce the costs of medical products and
services.  The  Affordable  Care  Act  contains  a  number  of  provisions,  including  those  governing  enrollment  in  federal  healthcare  programs,  reimbursement
changes  and  fraud  and  abuse  measures,  all  of  which  will  impact  existing  government  healthcare  programs  and  will  result  in  the  development  of  new
programs. The Affordable Care Act, among other things, imposed an excise tax of 2.3% on the sale of most medical devices, including ours, and any failure
to  pay  this  amount  could  result  in  the  imposition  of  an  injunction  on  the  sale  of  our  products,  fines  and  penalties.  Although  this  tax  has  been  suspended
through 2019, it is expected to apply to sales of our products in 2020 and thereafter. The current presidential administration and Congress may continue to
pursue significant changes to the current health care laws. We face uncertainties that might result from modifications or repeal of any of the provisions of the
Affordable Care Act, including as a result of current and future executive orders and legislative actions. The impact of those changes on us and potential
effect on the medical device industry as a whole is currently unknown. Any changes to the Affordable Care Act are likely to have an impact on our results of
operations,  and  may  have  a  material  adverse  effect  on  our  results  of  operations.  We  cannot  predict  what  other  health  care  programs  and  regulations  will
ultimately be implemented at the federal or state level or the effect of any future legislation or regulation in the United States may have on our business.

The continuing efforts of the government, insurance companies, managed care organizations and other payors of healthcare services to contain or reduce costs
of healthcare may harm:

•
•
•

our ability to set a price that we believe is fair for our Zio service;
our ability to generate revenue and achieve or maintain profitability; and
the availability of capital.

Compliance with environmental laws and regulations could be expensive, and failure to comply with these laws and regulations could subject us to
significant liability.

Our research and development and manufacturing operations may involve the use of hazardous substances and are subject to a variety of federal, state, local
and foreign environmental laws and regulations relating to the storage, use, discharge, disposal,

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remediation  of,  and  human  exposure  to,  hazardous  substances  and  the  sale,  labeling,  collection,  recycling,  treatment  and  disposal  of  products  containing
hazardous substances. Liability under environmental laws and regulations can be joint and several and without regard to fault or negligence. Compliance with
environmental laws and regulations may be expensive and noncompliance could result in substantial liabilities, fines and penalties, personal injury and third-
party  property  damage  claims  and  substantial  investigation  and  remediation  costs.  Environmental  laws  and  regulations  could  become  more  stringent  over
time, imposing greater compliance costs and increasing risks and penalties associated with violations. We cannot assure you that violations of these laws and
regulations will not occur in the future or have not occurred in the past as a result of human error, accidents, equipment failure or other causes. The expense
associated with environmental regulation and remediation could harm our financial condition and operating results.

Exposure to United Kingdom political developments, including the outcome of its withdrawal from membership in the
European Union, could be costly and difficult to comply with and could seriously harm our business.

We have based a significant portion of our non-U.S. operations in the United Kingdom. In June 2016, a referendum was held in the U.K. which resulted in a
majority voting in favor of the U.K. withdrawing from the E.U. (commonly referred to as “Brexit”). Pursuant to legislation approved by the U.K. Parliament
and the E.U. Parliament in January 2020, the U.K. withdrew from the E.U. with effect from 11 p.m. (GMT) on January 31, 2020 on the terms of a withdrawal
agreement  agreed  between  the  U.K.  and  the  E.U.  in  October  2019  (the  “Withdrawal  Agreement”).  The  Withdrawal  Agreement  provides  that  the  U.K.’s
withdrawal is followed by a “transition period”, during which, in summary, the U.K. is not a member of the E.U. but most E.U. rules and regulations continue
to apply to the U.K. During the transition period, the U.K. and the E.U. will seek to negotiate the terms of a long-term trading relationship between the U.K.
and the E.U. based on a “Political Declaration” agreed between the U.K. and the E.U. in October 2019. The transition period provided for in the Withdrawal
Agreement will expire on December 31, 2020 (unless both the U.K. and the E.U. agree to extend the period of transition by one or two years). The political
negotiation surrounding the terms of the U.K.’s withdrawal from the E.U. has created significant uncertainty about the future relationship between the U.K.
and the E.U., including with respect to the laws and regulations that will apply. This is because, once the “transition period” expires then, subject to the terms
of any long-term trading relationship agreed between the U.K. and the E.U., the U.K. will determine which E.U.-derived laws to replace or replicate. If no
long-term trading relationship is agreed between the U.K. and the E.U. by the end of the transition period provided for in the Withdrawal Agreement, the
U.K.’s  membership  of  the  E.U.  could  ultimately  terminate  under  a  so-called  “hard  Brexit.”  The  full  effect  of  Brexit  is  uncertain  and  depends  on  any
agreements the U.K. may make to retain access to E.U. markets. Consequently, no assurance can be given about the impact of the outcome and our business,
including operational and tax policies, may be seriously harmed or require reassessment if our European operations or presence become a significant part of
our business.

Risks Related to Our Common Stock

Future sales and issuances of securities could negatively affect our stock price and dilute the ownership interest of our existing investors.

Our  expected  future  capital  requirements  may  depend  on  many  factors,  including  expanding  our  customer  base,  the  expansion  of  our  salesforce,  and  the
timing  and  extent  of  spending  on  the  development  of  our  technology  to  increase  our  product  offerings.  If  we  raise  additional  funds  by  issuing  equity
securities,  our  stockholders  may  experience  dilution.  Additionally,  new  investors  could  gain  rights,  preferences  and  privileges  senior  to  those  of  existing
holders of our common stock. Any future debt financing into which we enter may impose upon us additional covenants that restrict our operations, including
limitations  on  our  ability  to  incur  liens  or  additional  debt,  pay  dividends,  repurchase  our  common  stock,  make  certain  investments  and  engage  in  certain
merger, consolidation or asset sale transactions. Any debt financing or additional equity that we raise may contain terms that are not favorable to us or our
stockholders.

Sales or issuances of a substantial amount of securities, or the perception that such sales could occur, may cause a decline in the price of our common stock.
Future resales of our common stock by our existing stockholders could cause the market price of our common stock to decline. In addition, the shares of
common stock subject to outstanding options and restricted stock units under our 2016 Equity Incentive Plan and our 2016 Employee Stock Purchase Plan
and the shares reserved for future issuance under both such plans may become eligible for sale in the public markets in the future, subject to certain legal and
control limitations.

We  may  sell  shares  or  other  securities  in  any  offering  at  a  price  per  share  that  is  less  than  the  price  per  share  paid  by  existing  investors,  and  investors
purchasing shares or other securities in the future could have rights superior to existing stockholders. The price per share at which we sell additional shares of
our common stock, or securities convertible or exchangeable into common stock, in future transactions may be higher or lower than the price per share paid
by existing investors.

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The market price of our common stock may fluctuate substantially, and you could lose all or part of your investment.

The market price of our common stock may fluctuate substantially in response to, among other things, the risk factors described in this Annual Report on
Form 10-K and other factors, many of which are beyond our control, including:

•
•
•
•
•

•

•
•

•
•
•
•
•
•
•
•
•

changes in analysts’ estimates, investors’ perceptions, recommendations by securities analysts or our failure to achieve analysts’ estimates;
quarterly variations in our or our competitors’ results of operations;
periodic fluctuations in our revenue, due in part to the way in which we recognize revenue;
the financial projections we may provide to the public, any changes in these projections or our failure to meet these projections;
general market conditions and other factors unrelated to our operating performance or the operating performance of our competitors;

changes in reimbursement by current or potential payors;

changes in CPT codes or the establishment of new CPT codes applicable to the Zio service;
changes in operating performance and stock market valuations of other technology companies generally, or those in the medical device industry in
particular;
actual or anticipated changes in regulatory oversight of our products;
the results of our clinical trials;
the loss of key personnel, including changes in our board of directors and management;
legislation or regulation of our market;
lawsuits threatened or filed against us;
the announcement of new products or product enhancements by us or our competitors;
announced or completed acquisitions of businesses or technologies by us or our competitors;
announcements related to patents issued to us or our competitors and to litigation; and
developments in our industry.

In addition, the market prices of the stock of many new issuers in the medical device industry and of other companies with smaller market capitalizations like
us  have  been  volatile  and  from  time  to  time  have  experienced  significant  share  price  and  trading  volume  changes  unrelated  or  disproportionate  to  the
operating performance of those companies. Fluctuations in our stock price, volume of shares traded, and changes in our market valuations may make our
stock less attractive to certain investors. In the past, stockholders have filed securities class action litigation following periods of market volatility. If we were
to become involved in securities litigation, it could subject us to substantial costs, divert resources and the attention of management from our business, and
adversely  affect  our  business,  results  of  operations,  financial  condition,  reputation  and  cash  flows.  These  factors  may  materially  and  adversely  affect  the
market price of our common stock.

If securities or industry analysts do not publish research or reports about our business, or publish negative reports about our business, our share price
and trading volume could decline.

The trading market for our common stock depends in part on the research and reports that securities or industry analysts publish about us or our business, our
market and our competitors. We do not have any control over these analysts. If one or more of the analysts who cover us downgrade our shares or change
their opinion of our business, our share price would likely decline. If one or more of these analysts cease coverage of our company or fail to regularly publish
reports on us, we could lose visibility in the financial markets, which could cause our share price or trading volume to decline.

The requirements of being a public company may strain our resources, divert management’s attention and affect our ability to attract and retain executive
management and qualified board members.

As  a  public  company,  we  are  subject  to  the  reporting  requirements  of  the  Exchange  Act,  the  Sarbanes-Oxley  Act,  the  Dodd  Frank  Act,  the  listing
requirements of The NASDAQ Stock Market and other applicable securities laws, rules and regulations. Compliance with these laws, rules and regulations
will increase our legal and financial compliance costs, make some activities more difficult, time consuming or costly and increase demand on our systems and
resources.  The  Exchange  Act  requires,  among  other  things,  that  we  file  annual,  quarterly  and  current  reports  with  respect  to  our  business  and  operating
results.  The  Sarbanes-Oxley  Act  requires,  among  other  things,  that  we  maintain  effective  disclosure  controls  and  procedures  and  internal  control  over
financial reporting. In order to maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to meet
this  standard,  significant  resources  and  management  oversight  may  be  required.  As  a  result,  our  management  and  other  personnel  divert  attention  from
operational and other business matters to devote substantial time to these public company requirements. In particular, we will incur significant expenses and
devote substantial

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management effort toward ensuring compliance with the requirements of Section 404, which has increased now that we will no longer be an emerging growth
company  under  the  JOBS  Act.  We  continue  to  hire  additional  accounting  and  financial  staff  with  appropriate  public  company  experience  and  technical
accounting knowledge. We cannot predict or estimate the amount of additional costs we will incur in order to remain compliant with our public company
reporting  requirements  or  the  timing  of  such  costs.  Additional  compensation  costs  and  any  future  equity  awards  will  increase  our  compensation  expense,
which will increase our general and administrative expense and could adversely affect our profitability.

In addition, changing laws, regulations and standards relating to corporate governance and public disclosure are creating uncertainty for public companies,
increasing  legal  and  financial  compliance  costs  and  making  some  activities  more  time  consuming.  These  laws,  regulations  and  standards  are  subject  to
varying interpretations, in many cases due to their lack of specificity and, as a result, their application in practice may evolve over time as new guidance is
provided  by  regulatory  and  governing  bodies.  This  could  result  in  continuing  uncertainty  regarding  compliance  matters  and  higher  costs  necessitated  by
ongoing revisions to disclosure and governance practices. We intend to invest resources to comply with evolving laws, regulations and standards, and this
investment  may  result  in  increased  general  and  administrative  expenses  and  a  diversion  of  management’s  time  and  attention  from  revenue  generating
activities  to  compliance  activities.  If  our  efforts  to  comply  with  new  laws,  regulations  and  standards  differ  from  the  activities  intended  by  regulatory  or
governing bodies due to ambiguities related to their application and practice, regulatory authorities may initiate legal proceedings against us and our business
may be harmed.

We will incur additional compensation costs in the event that we decide to pay our executive officers cash compensation closer to that of executive officers of
other  public  medical  device  companies,  which  would  increase  our  general  and  administrative  expense  and  could  harm  our  profitability.  Any  future  equity
awards will also increase our compensation expense. We also expect that being a public company and compliance with applicable rules and regulations will
make it more expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced coverage or incur substantially
higher costs to obtain coverage. These factors could also make it more difficult for us to attract and retain qualified executive officers and members of our
board of directors, particularly to serve on our audit committee and compensation committee.

As a result of disclosure of information in this filing and in other filings required of a public company, our business and financial condition is more visible,
which could be advantageous to our competitors and other third parties and could result in threatened or actual litigation. If such claims are successful, our
business and operating results could be harmed, and even if the claims are resolved in our favor, these claims, and the time and resources necessary to resolve
them, could divert the resources of our management and harm our business and operating results.

Anti-takeover provisions in our amended and restated certificate of incorporation and bylaws, and Delaware law, could discourage a change in control of
our company or a change in our management.

Our amended and restated certificate of incorporation and bylaws contain provisions that might enable our management to resist a takeover. These provisions
include:

•
•

•
•
•
•
•

•
•
•

a classified board of directors;
advance notice requirements applicable to stockholders for matters to be brought before a meeting of stockholders and requirements as to the form
and content of a stockholders’ notice;
a supermajority stockholder vote requirement for amending certain provisions of our amended and restated certificate of incorporation and bylaws;
the right to issue preferred stock without stockholder approval, which could be used to dilute the stock ownership of a potential hostile acquirer;
allowing stockholders to remove directors only for cause;
a requirement that the authorized number of directors may be changed only by resolution of the board of directors;
allowing all vacancies, including newly created directorships, to be filled by the affirmative vote of a majority of directors then in office, even if less
than a quorum, except as otherwise required by law;
a requirement that our stockholders may only take action at annual or special meetings of our stockholders and not by written consent;
limiting the forum to Delaware for certain litigation against us; and
limiting the persons that can call special meetings of our stockholders to our board of directors, the chairperson of our board of directors, the chief
executive officer or the president (in the absence of a chief executive officer).

These provisions might discourage, delay or prevent a change in control of our company or a change in our management. The existence of these provisions
could adversely affect the voting power of holders of common stock and limit the price that investors might be willing to pay in the future for shares of our
common stock. In addition, because we are incorporated in

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Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which generally prohibits a Delaware corporation
from engaging in any of a broad range of business combinations with any “interested” stockholder for a period of three years following the date on which the
stockholder became an “interested” stockholder.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware will be the sole and exclusive forum
for  substantially  all  disputes  between  us  and  our  stockholders,  which  could  limit  our  stockholders’  abilities  to  obtain  a  favorable  judicial  forum  for
disputes with us or our directors, officers or employees.

Our amended and restated certificate of incorporation provides that, unless we consent to the selection of an alternative forum, the Court of Chancery of the
State of Delaware is the sole and exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach
of fiduciary duty owed by any of our directors, officers or other employees to us or to our stockholders, (iii) any action asserting a claim arising pursuant to
the  Delaware  General  Corporation  Law  or  our  amended  and  restated  certificate  of  incorporation  or  bylaws,  (iv)  any  action  to  interpret,  apply,  enforce  or
determine the validity of our amended and restated certificate of incorporation or bylaws or (v) any action asserting a claim governed by the internal affairs
doctrine. The choice of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our
directors, officers or other employees, which may discourage such lawsuits against us and our directors, officers and other employees. Alternatively, if a court
were to find the choice of forum provision contained in our amended and restated certificate of incorporation to be inapplicable or unenforceable in an action,
we may incur additional costs associated with resolving such action in other jurisdictions, which could harm our business, financial condition and operating
results.

We have not paid dividends in the past and do not expect to pay dividends in the future, and, as a result, any return on investment may be limited to the
value of our stock.

We  have  never  paid  cash  dividends  and  do  not  anticipate  paying  cash  dividends  in  the  foreseeable  future.  The  payment  of  dividends  will  depend  on  our
earnings, capital requirements, financial condition, prospects and other factors our board of directors may deem relevant. In addition, our loan agreements
limit  our  ability  to,  among  other  things,  pay  dividends  or  make  other  distributions  or  payments  on  account  of  our  common  stock,  in  each  case  subject  to
certain exceptions. If we do not pay dividends, our stock may be less valuable because a return on your investment will only occur if you sell our common
stock after our stock price appreciates.

Item 1B. Unresolved Staff Comments.

Not applicable.

Item 2. Properties.

We currently lease 117,560 square feet for our corporate headquarters located in San Francisco, California under a twelve-year lease term, which will

expire on August 31, 2031.

We  lease  41,500  square  feet  for  our  clinical  center  in  Lincolnshire,  Illinois  under  a  lease  agreement  that  expires  in  October  2021.  We  also  lease

20,276 square feet in Houston, Texas for another clinical center under a lease agreement that expires in October 2027.

We lease 14,616 square feet for our manufacturing and distribution facilities in Cypress, California under an agreement that expires in September

2020.

We believe that these facilities are sufficient to meet our current and anticipated future needs.

Item 3. Legal Proceedings.

We  are  not  currently  a  party  to  any  material  litigation  or  other  material  legal  proceedings.  From  time  to  time  we  may  be  involved  in  legal
proceedings  or  investigations,  which  could  have  an  adverse  impact  on  our  reputation,  business  and  financial  condition  and  divert  the  attention  of  our
management from the operation of our business.

Item 4. Mine Safety Disclosures.

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information

The market in which our common stock is traded is the NASDAQ Global Select Market under the symbol “IRTC”. The following table sets forth the
high and low sales price per share of our common stock for each full quarterly period within the two most recent fiscal years as reported on The NASDAQ
Global Select Market:

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

Holders of Common Stock

2019

2018

High

Low

High

Low

$

$

$

$

97.34    $

80.48    $

83.77    $

72.97    $

65.44    $

66.64    $

68.59    $

61.00    $

66.94    $

84.41    $

96.89    $

92.40    $

57.58   

57.89   

73.27   

60.15   

As of February 21, 2020 there were 22 holders of record of our common stock. Certain shares are held in “street” name and, accordingly, the number of

beneficial owners of such shares is not known or included in the foregoing number.

Dividend Policy

We have never declared or paid cash dividends on our capital stock. We intend to retain all available funds and any future earnings, if any, to fund the
development and expansion of our business and we do not anticipate paying any cash dividends in the foreseeable future. Any future determination related to
dividend policy will be made at the discretion of our board of directors.

Performance Graph

This  graph  is  not  “soliciting  material,”  is  not  deemed  “filed”  with  the  SEC  and  is  not  to  be  incorporated  by  reference  into  any  filing  of  iRhythm
Technologies, Inc. under the Securities Act or the Exchange Act, whether made before or after the date hereof and irrespective of any general incorporation
language in any such filing.

The following graph shows the total stockholder return of an investment of $100 in cash at market close on October 20, 2016 (the first day of trading
of  our  common  stock),  through  December  31,  2019  for  (i)  our  common  stock,  (ii)  the  NASDAQ  Composite  Index  (U.S.)  and  (iii)  the  NASDAQ
Biotechnology Index. Pursuant to applicable Securities and Exchange Commission rules, all values assume reinvestment of the full amount of all dividends,
however no dividends have been declared on our common stock to date. The stockholder return shown on the graph below is not necessarily indicative of
future performance, and we do not make or endorse any predictions as to future stockholder returns.

55

Table of Contents

iRhythm Technologies, Inc.

NASDAQ Composite

NASDAQ Biotechnology

Issuer Purchases of Equity Securities

None

10/20/2016

12/31/2016

12/31/2017

12/31/2018

12/31/2019

$

$

$

100    $

100    $

100    $

115   

103   

98   

$

$

$

215   

132   

119   

$

$

$

267   

127   

108   

$

$

$

261   

171   

134   

56

Table of Contents

Item 6. Selected Consolidated Financial Data.

The  information  set  forth  below  should  be  read  in  conjunction  with  "Item  7.  Management's  Discussion  and  Analysis  of  Financial  Condition  and
Results of Operations" and our financial statements and related notes included elsewhere in this Annual Report on Form 10-K. The selected consolidated
financial data in this section are not intended to replace our financial statements. The statement of operations data for the years ended December 31, 2019,
2018,  and  2017,  and  the  balance  sheet  data  at  December  31,  2019,  and  2018  are  derived  from  our  audited  consolidated  financial  statements  included
elsewhere in this Annual Report on Form 10-K. The statement of operations data for the years ended December 31, 2016 and 2015 and the balance sheet data
at December 31, 2017, 2016, and 2015 are derived from our consolidated financial statements, which are not included herein. The financial data included in
this report are historical, are not necessarily indicative of results to be expected in any future period, and reflect the revisions which are discussed in Note 1
“Organization and Description of Business” within our consolidated financial statements included in Item 8 of this Annual Report on Form 10-K.

Consolidated Statements of Operations Data:

Revenue
Cost of revenue(2)

Gross profit

Operating expenses:

Research and development(2)
Selling, general and administrative(2)

Total operating expense(2)

Loss from operations

Interest expense
Other income (expense), net(1)

Loss on extinguishment of debt

Loss before income taxes(1)
Income tax provision

Net loss

Net loss per common share, basic and diluted

Weighted-average shares, basic and diluted

Year Ended December 31,
(in thousands, except share and per share data)

2019

2018

2017

2016(1)

2015

$

214,552    $

147,277    $

99,129    $

64,551    $

52,485   

162,067   

37,299   

179,523   

216,822   

(54,755)  

(1,643)  

1,895   

—   

38,795   

108,482   

20,860   

133,313   

154,173   

(45,691)  

(3,115)  

1,501   

(3,029)  

28,203   

70,926   

13,265   

85,252   

98,517   

(27,591)  

(3,386)  

1,237   

—   

20,891   

43,660   

7,218   

51,916   

59,134   

(15,474)  

(3,248)  

(2,073)  

—   

36,140   

14,700   

21,440   

6,349   

36,722   

43,071   

(21,631)  

(1,059)  

(109)  

—   

(54,503)  

(50,334)  

(29,740)  

(20,795)  

(22,799)  

65   

44   

—   

—   

—   

(54,568)   $

(50,378)   $

(29,740)   $

(20,795)   $

(22,799)  

(2.16)   $

(2.11)   $

(1.31)   $

(3.93)   $

(16.57)  

$

$

25,265,918   

23,885,858   

22,627,327   

5,285,847   

1,376,106   

(1)

(2)

As disclosed in Note 1 to our consolidated financial statements included within this Annual Report on Form 10-K, we revised certain prior period
financial information for immaterial errors in our accounting for revenues, contractual allowances, allowance for doubtful accounts and certain other
items. The revision for the year ended December 31, 2016, which consolidated financial statements are not included within this Annual Report on
Form  10-K,  resulted  in  an  increase  in  revenue  by  $0.5  million  and  an  increase  in  selling,  general  and  administrative  expense  by  $0.4  million,
resulting in net loss being decreased by $0.1 million.
Includes employee stock-based compensation as follows, which reflect revisions as described in (1) above:

Cost of revenue

Research and development

Selling, general and administrative

Total stock-based compensation

Year Ended December 31,

2019

2018

2017

2016

2015

$

$

658    $

193    $

589    $

25    $

4,462   

21,121   

3,057   

13,079   

1,619   

7,544   

271   

1,946   

26,241    $

16,329    $

9,752    $

2,242    $

17   

165   

1,228   

1,410   

57

Table of Contents

2019

2018

As of December 31,
2017(1)

2016(1)

2015

Consolidated Balance Sheets Data:

Cash and cash equivalents

Working capital

Total assets

Operating lease liabilities, noncurrent portion

Notes payable

Convertible preferred stock

Accumulated deficit

$

20,462    $

20,023    $

8,671    $

51,643    $

120,726   

306,212   

85,748   

34,933   

—   

73,961   

117,523   

—   

34,899   

—   

98,376   

133,379   

—   

33,978   

—   

105,872   

138,635   

—   

32,227   

—   

(260,393)  

(205,825)  

(156,801)  

(127,061)  

Total stockholders' equity (deficit)

$

135,409    $

52,137    $

79,341    $

93,041    $

25,208   

24,054   

37,872   

—   

30,552   

97,096   

(106,266)  

(101,624)  

(1)

As disclosed in Note 1 to our consolidated financial statements included within this Annual Report on Form 10-K, we revised certain prior period
financial information for immaterial errors in our accounting for revenues, contractual allowances, allowance for doubtful accounts and certain other
items. The impact of the revision on our 2017 and 2016 consolidated balance sheets not included within this Annual Report on Form 10-K, was an
decrease of $0.3 million and an increase of $0.5 million to working capital, an increase of $0.3 million and an increase of $0.5 million to total assets,
an increase of $0.2 million and a decrease of $0.1 million to accumulated deficit and a decrease of $0.2 million and an increase of $0.5 million to
stockholders’ equity as of December 31, 2017 and 2016, respectively.

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Table of Contents

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion and analysis of our financial condition and results of operations together with the financial statements and
related notes included elsewhere in Item 8 of Part II of this Annual Report on Form 10-K. This discussion and other parts of this Annual Report on Form 10-
K reflect the revisions disclosed in our Form 10-Q filed on December 23, 2019 and contain forward-looking statements that involve risks and uncertainties,
such  as  statements  of  our  plans,  objectives,  expectations  and  intentions.  Our  actual  results  could  differ  materially  from  those  discussed  in  these  forward-
looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in the section of this Annual
Report on Form 10-K entitled “Risk Factors.”

The  Company  identified  errors  and  made  revisions  to  prior  fiscal  years  as  discussed  in  Note  1.Organization  and  Description  of  Business  in  our
accompanying consolidated financial statements. Accordingly, this Management’s Discussion and Analysis of Financial Condition and Results of Operations
reflects the effects of the revisions.

Overview

We  are  a  digital  healthcare  company  redefining  the  way  cardiac  arrhythmias  are  clinically  diagnosed  by  combining  our  wearable  biosensing
technology with cloud-based data analytics and deep-learning capabilities. Our goal is to be the leading provider of ambulatory electrocardiogram (“ECG”)
monitoring for patients at risk for arrhythmias. We have created a full portfolio of ambulatory cardiac monitoring services on a unique platform, called the Zio
service, which combines an easy-to-wear and unobtrusive biosensor that can be worn for up to 14 consecutive days with powerful proprietary algorithms that
distill data from millions of heartbeats into clinically actionable information. The Zio service consists of:

•

•

•
•

wearable patch-based biosensors, Zio XT and Zio AT monitors, which continuously record and store ECG data from every patient heartbeat
for up to 14 consecutive days. Zio AT offers the option of timely transmission of data during the prescribed wear period

cloud-based analysis of the recorded cardiac rhythms using our proprietary, deep-learned algorithms

a final quality assessment review of the data by our certified cardiographic technicians
an easy-to-read Zio report, a curated summary of findings that includes high quality and clinically-actionable information which is sent
directly to a patient’s physician through ZioSuite and can be integrated into a patient’s electronic health record

We receive revenue for the Zio service primarily from third-party payors, which include commercial payors and government agencies, such as CMS,
Veterans Administration, and the military. In addition, a small percentage of institutions, which are typically hospitals or private physician practices, purchase
the Zio service from us directly. Our revenue in the third-party commercial payor category is primarily contracted, which means we have entered into pricing
contracts with these payors. Third-party contracted payors accounted for approximately 47%, 39% and 34% of our revenue for the years ended December 31,
2019,  2018  and  2017,  respectively.  Approximately  27%,  27%  and  28%  of  our  total  revenue  for  the  years  ended  December  31,  2019,  2018  and  2017,
respectively,  is  received  from  Centers  for  Medicare  and  Medicaid  Services  (“CMS”),  which  is  under  established  reimbursement  codes.  Healthcare
institutions, which are typically hospitals or private physician practices accounted for approximately 20%, 25% and 28% of our revenue for the years ended
December 31, 2019, 2018, and 2017 respectively. Non-contracted third-party payors and self-pay accounted for 5%, 8%, and 11% of our total revenue for the
years ended December 31, 2019, 2018, and 2017, respectively. We rely on a third-party billing partner, XIFIN, Inc., to submit patient claims and collect from
commercial payors, certain government agencies, and patients.

Since our Zio service was cleared by the U.S. Food and Drug Administration (“FDA”), we have provided the Zio service to over two million patients
and  have  collected  over  500  million  hours  of  curated  heartbeat  data.  We  believe  the  Zio  service  is  well-positioned  to  disrupt  an  already-established  $1.8
billion U.S. ambulatory cardiac monitoring market by offering a user-friendly device to patients, actionable information to physicians and value to payors.

We market our ambulatory cardiac monitoring solution in the United States through a direct sales organization comprised of sales management, field
billing  specialists,  quota-carrying  sales  representatives,  and  a  customer  experience  team.  Our  sales  representatives  focus  on  initial  introduction  into  new
customers, penetration across a sales region, driving adoption within existing accounts and conveying our message of clinical and economic value to service
line managers and hospital administrators and other clinical departments. We continue to increase the size of our U.S. sales organization to expand the current
customer  account  base  and  increase  utilization  of  our  Zio  service.  In  addition,  we  will  continue  exploring  sales  and  marketing  expansion  opportunities  in
international geographies.

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Table of Contents

Components of Results of Operations

Revenue

Substantially all of our revenue is derived from sales of our Zio service in the United States. We earn revenue from the provision of our Zio service
primarily from contracted third-party payors, CMS, and healthcare institutions. In addition, a small percentage of institutions, which are typically hospitals or
private physician practices, purchase the Zio service from us directly, and a very small percentage of commercial non-contracted payors.

We  recognize  revenue  on  an  accrual  basis  based  on  estimates  of  the  amount  that  will  ultimately  be  realized,  which  is  the  difference  between  the
amount submitted for payment and the amount received. These estimates require significant judgment by management. In determining the amount to accrue
for a delivered report, and Zio service provided, the Company considers factors such as claim payment history from both payors and patient out-of-pocket
costs, payor coverage, whether there is a contract between the payor or healthcare institution and the Company, historical amount received for the service, and
any current developments or changes that could impact reimbursement and healthcare institution payments.

We expect our revenue to increase as we expand our sales and marketing infrastructure, increase awareness of our product offerings, increase the
number of covered and contracted lives for our Zio service, expand the range of indications for our Zio service and develop new products and services. We
are subject to seasonality similar to other companies in our field, as vacations by physicians and patients tend to affect enrollment in the Zio service more
during the summer months and during the end of calendar year holidays compared to other times of the year.

Cost of Revenue and Gross Margin

Cost  of  revenue  includes  direct  labor,  material  costs,  equipment  and  infrastructure  expenses,  amortization  of  internal-use  software,  allocated
overhead,  and  shipping  and  handling.  Direct  labor  includes  payroll  and  personnel-related  costs  including  stock-based  compensation  involved  in
manufacturing, data analysis, and customer service. Material costs include both the disposable materials costs of the Zio monitors and amortization of the re-
usable printed circuit board assemblies (“PCBAs”). Each Zio XT monitor includes a PCBA, and each Zio AT monitor includes a PCBA and gateway board,
the cost of which is amortized over the anticipated number of uses of the board. We expect cost of revenue to increase in absolute dollars to the extent our
revenue grows.

We calculate gross margin as gross profit divided by revenue. Our gross margin has been and will continue to be affected by a variety of factors,
including increased contracting with third-party payors and institutional providers. Historically, we have increased our average selling price by entering into
contracts with third-party commercial payors at rates that were higher than amounts typically collected from payors without contracts or from institutional
customers. We have in the past been able to increase our pricing as third-party payors become more familiar with the benefits of the Zio service and move to
contracted pricing arrangements. We believe we will be able to continue to achieve pricing increases as more payors contract with us due to the benefits the
Zio service provide compared to other available products. We expect to continue to decrease the cost of service per device by obtaining volume purchase
discounts for our material costs and implementing scan-time algorithm improvements and software-driven and other workflow enhancements to reduce labor
costs. We expect further decreases in the cost of service as we spread the fixed portion of our overhead costs over a larger number of units produced, which
will result in a decrease in our per unit manufacturing costs.

Research and Development Expenses

We expense research and development costs as they are incurred. Research and development expenses include payroll and personnel-related costs,
including stock-based compensation, consulting services, clinical studies, laboratory supplies and allocated facility overhead costs. We expect our research
and development costs to increase in absolute dollars as we hire additional personnel to develop new product and service offerings and product enhancements.

Selling, General and Administrative Expenses

Our  sales  and  marketing  expenses  consist  of  payroll  and  personnel-related  costs,  including  stock-based  compensation,  sales  commissions,  travel
expenses, consulting, public relations costs, direct marketing, tradeshow and promotional expenses and allocated facility overhead costs. We expect our sales
and marketing expenses to increase in absolute dollars as we hire additional sales personnel and increase our sales support infrastructure in order to further
penetrate the U.S. market and expand into international markets.

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Table of Contents

Our  general  and  administrative  expenses  consist  primarily  of  payroll  and  personnel-related  costs  for  executive,  finance,  legal  and  administrative
personnel,  including  stock-based  compensation.  Other  significant  expenses  include  professional  fees  for  legal  and  accounting  services,  consulting  fees,
recruiting fees, bad debt expense, third-party claims processing fees and travel expenses.

Interest Expense

Interest expense consists of cash and non-cash components. The cash component of interest expense is attributable to borrowings under our loan
agreements. Refer to Note 7. Debt, for further information on our loan agreements. The non-cash component consists of interest expense recognized from the
amortization of debt discounts derived from the issuance of warrants and debt issuance costs capitalized on our balance sheets and, for 2017, “paid-in-kind”
interest when debt payments were interest only and a portion of interest payments were added back to the debt balance.

Other Income (Expense), Net

Other income, net consists primarily of interest income which consists of interest received on our cash, cash equivalents and investments balances.

Results of Operations

Comparison of the Years Ended December 31 2019, and 2018

Revenue

Cost of revenue

Gross profit

Gross margin

Operating expenses:

Research and development

Selling, general and administrative

Total operating expenses

Loss from operations

Interest expense

Other income, net

Loss on extinguishment of debt

Loss before income taxes

Income tax provision

Net loss

Revenue

Years Ended December 31,

2019

2018

$ Change

% Change

$

214,552 

  $

(dollars in thousands)
  $

147,277 

52,485 

162,067 

38,795 

108,482 

76  %

74  %

37,299 

179,523 

216,822 

(54,755)

(1,643)

1,895 

— 

(54,503)

65 

20,860 

133,313 

154,173 

(45,691)

(3,115)

1,501 

(3,029)

(50,334)

44 

67,275   

13,690   

53,585   

16,439   

46,210   

62,649   

(9,064)  

1,472   

394   

3,029   

(4,169)  

21   

$

(54,568)

  $

(50,378)

  $

(4,190)  

46  %

35  %

49  %

79  %

35  %

41  %

20  %

47  %

26  %

n/a 

8  %

48  %

8  %

Revenue increased $67.3 million, or 46%, to $214.6 million during the year ended December 31, 2019 from $147.3 million during the year ended
December 31, 2018. The increase in revenue was attributable to the increase in volume of the Zio services performed as a result of the expansion of coverage
and the increase in the number of payors under contract, increasing physician acceptance and expansion of our sales force as we continue to gain market
acceptance for our Zio service.

Cost of Revenue and Gross Margin

Cost of revenue increased $13.7 million, or 35%, to $52.5 million during the year ended December 31, 2019 from $38.8 million during the year
ended December 31, 2018. The increase in cost of revenue was primarily due to increased Zio service volume in 2019. This increase was partially offset by
the reduction in costs to provide the Zio service, which was

61

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

achieved  through  manufacturing  efficiencies  in  the  production  of  our  device  and  reductions  in  cardiographic  technician  labor  costs  through  algorithm
improvements and software driven workflow enhancements.

Gross margin for the year ended December 31, 2019 increased to 76%, compared to 74% for the year ended December 31, 2018. The increase was
driven primarily by the reduction in the cost of the Zio service due to our continued efforts to lower manufacturing costs, fixed costs absorption and reduced
labor costs per device through our algorithm improvements and software-driven and other workflow enhancements. In addition, we experienced some mix
shift and average selling price growth driven by the success of our contracting efforts, which also improved our gross margin during the year ended December
31, 2019.

Research and Development Expenses

Research and development expenses increased $16.4 million, or 79%, to $37.3 million during the year ended December 31, 2019 from $20.9 million
during the year ended December 31, 2018. The increase was primarily attributable to a $7.4 million increase in payroll and personnel-related expenses as a
result of increased headcount, $6.0 million payment to Verily, and $3.3 million for allocated facility-related expenses. This was partially offset by $3.3 million
increase in capitalization of internal use software.

Selling, General and Administrative Expenses

Selling,  general  and  administrative  expenses  increased  $46.2  million,  or  35%,  to  $179.5  million  during  the  year  ended  December  31,  2019  from
$133.3 million during the year ended December 31, 2018. The increase was primarily attributable to a $19.8 million increase in payroll and personnel-related
expenses and $9.9 million increase in employee stock-based compensation as a result of increased headcount to support the growth in our operations. The
increase was also driven by an increase in professional services of $8.1 million.

A  significant  amount  of  selling,  general,  and  administrative  incremental  spend  can  be  directly  attributed  to  our  continued  focus  on  salesforce

expansion and its support infrastructure to support our growth strategy.

Interest Expense

Interest expense decreased $1.5 million to $1.6 million during the year ended December 31, 2019 from $3.1 million during the year ended December

31, 2018 due to the extinguishment of the loan agreement with Biopharma Secured Investments III Holdings Cayman LP in October 2018.

Other Income, Net

Other income, increased to $1.9 million for the year ended December 31, 2019, compared to $1.5 million for year ended December 31, 2018. The

increase in other income is primarily due to an increase in our investment portfolio during the fourth quarter of 2019.

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Table of Contents

Comparison of the Year Ended December 31 2018, and 2017

Revenue

Cost of revenue

Gross profit

Gross margin

Operating expenses:

Research and development

Selling, general and administrative

Total operating expenses

Loss from operations

Interest expense

Other income, net

Loss on extinguishment of debt

Loss before income taxes

Income tax provision

Net loss

Revenue

Years Ended December 31,

2018

2017

$ Change

% Change

$

147,277 

$

(dollars in thousands)
  $

99,129 

38,795

108,482

74  %

28,203 

70,926 

72  %

20,860 

133,313 

154,173 

(45,691)

(3,115)

1,501 

(3,029)

(50,334)

44 

13,265 

85,252 

98,517 

(27,591)

(3,386)

1,237 

— 

(29,740)

— 

$

(50,378)

$

(29,740)

48,148   

10,592   

37,556   

7,595   

48,061   

55,656   

(18,100)  

271   

264   

(3,029)  

(20,594)  

44   

(20,638)  

49  %

38  %

53  %

57  %

56  %

56  %

66  %

8  %

21  %

n/a 

69  %

n/a 

69  %

Revenue increased $48.1 million, or 49%, to $147.3 million during the year ended December 31, 2018 from $99.1 million during the year ended
December 31, 2017. The increase in revenue was primarily attributable to the increase in volume of the Zio service performed as a result of the expansion of
coverage and the increase in the number of payors under contract, increasing physician acceptance and expansion of our sales force as we continue to gain
market acceptance for our Zio service.

Cost of Revenue and Gross Margin

Cost of revenue increased $10.6 million, or 38%, to $38.8 million during the year ended December 31, 2018 from $28.2 million during the year
ended December 31, 2017. The increase in cost of revenue was primarily due to increased Zio service volume in 2018. This increase was partially offset by
the reduction in costs to provide the Zio service, which was achieved through manufacturing efficiencies in the production of our device and reductions in
cardiographic technician labor costs through algorithm improvements and software driven workflow enhancements.

Gross margin for the year ended December 31, 2018 increased to 74% compared to 72% for the year ended December 31, 2017. The increase was
driven primarily by the reduction in the cost of the Zio service due to our continued efforts to lower manufacturing costs, fixed costs absorption and reduced
labor costs per device through our algorithm improvements and software-driven and other workflow enhancements.

Research and Development Expenses

Research and development expenses increased $7.6 million, or 57%, to $20.9 million during the year ended December 31, 2018 from $13.3 million
during the year ended December 31, 2017. The increase was primarily attributable to a $4.7 million increase in payroll and personnel-related expenses as a
result of increased headcount, and $1.5 million for allocated facility-related expenses.

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Selling, General and Administrative Expenses

Selling,  general  and  administrative  expenses  increased  $48.1  million,  or  56%,  to  $133.3  million  during  the  year  ended  December  31,  2018  from
$85.3 million December 31, 2017. The increase was primarily attributable to a $33.6 million increase in payroll and personnel-related expenses as a result of
increased headcount to support the growth in our operations, which included an increase of $12.0 million in commissions and bonuses primarily as a result of
increased revenues. The increase was also driven by an increase in professional services of $3.5 million and bad debt expense of $2.2 million.

A  significant  amount  of  selling,  general,  and  administrative  incremental  spend  can  be  directly  attributed  to  our  continued  focus  on  salesforce

expansion and its support infrastructure to support our growth strategy.

Interest Expense

Interest expense decreased $0.3 million to $3.1 million during the year ended December 31, 2018 from $3.4 million during the year ended December
31,  2017  due  to  the  extinguishment  of  the  loan  agreement  with  Biopharma  Secured  Investments  III  Holdings  Cayman  LP  in  October  2018  as  well  as
repayment of the loan agreement with California HealthCare Foundation in May 2018.

Other Income, Net

Other income, net increased $0.3 million to income of $1.5 million during the year ended December 31, 2018 from $1.2 million during the year

ended December 31, 2017. The increase in other income is due to interest income on our investment portfolio.

Liquidity and Capital Expenditures

Overview

As of December 31, 2019, we had cash and cash equivalents of $20.5 million, short-term investments of $120.1 million, and an accumulated deficit

of $260.4 million.

Our expected future capital requirements may depend on many factors including expanding our customer base, the expansion of our salesforce, and
the  timing  and  extent  of  spending  on  the  development  of  our  technology  to  increase  our  product  offerings.  If  we  raise  additional  funds  by  issuing  equity
securities, our stockholders may experience dilution. Any future debt financing into which we enter may impose upon us additional covenants that restrict our
operations, including limitations on our ability to incur liens or additional debt, pay dividends, repurchase our common stock, make certain investments and
engage  in  certain  merger,  consolidation  or  asset  sale  transactions.  Any  debt  financing  or  additional  equity  that  we  raise  may  contain  terms  that  are  not
favorable to us or our stockholders.

Cash Flows

The following table summarizes our cash flows for the periods indicated (in thousands):

Net cash (used in) provided by:

Operating activities

Investing activities

Financing activities

Net increase (decrease) in cash, cash equivalents, and restricted cash

Cash Used in Operating Activities

Year Ended December 31,

2019

2018

2017

$

$

(21,863)   $

(29,093)   $

(89,274)  

111,576   

34,142   

6,303   

(14,911)  

(34,684)  

6,532   

439    $

11,352    $

(43,063)  

During  the  year  ended  December  31,  2019,  cash  used  in  operating  activities  was  $21.9  million  which  consisted  of  a  net  loss  of  $54.6  million,
adjusted by non-cash charges of $62.4 million and a net change of $29.7 million in our net operating assets and liabilities. The non-cash charges are primarily
comprised of stock-based compensation expense of $26.2 million, as well as depreciation and amortization expense of $3.4 million and a change in allowance
for doubtful accounts and contractual allowance of $24.6 million. The change in our net operating assets and liabilities compared to December 31, 2018 was
primarily due to an increase of $28.7 million in the change in accounts receivable as a result of the increase in our revenue, and

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an increase of $6.0 million in accrued liabilities, primarily related to increased accrued payroll and related compensation accruals.

During  the  year  ended  December  31,  2018  cash  used  in  operating  activities  was  $29.1  million,  which  consisted  of  a  net  loss  of  $50.4  million,
adjusted by non-cash charges of $34.3 million and a net change of $13.0 million in our net operating assets and liabilities. The non-cash charges are primarily
comprised of stock-based compensation expense of $16.3 million, as well as a change in allowance for doubtful accounts and contractual allowance of $16.4
million. The change in our net operating assets and liabilities compared to December 31, 2017 was primarily due to an increase of $21.7 million in the change
in accounts receivable as a result of the increase in our revenue, and an increase of $10.5 million in accrued liabilities, primarily related to increased accrued
payroll and related compensation accruals.

During  the  year  ended  December  31,  2017  cash  used  in  operating  activities  was  $14.9  million,  which  consisted  of  a  net  loss  of  $29.7  million,
adjusted by non-cash charges of $22.0 million and a net change of $7.2 million in our net operating assets and liabilities. The non-cash charges are primarily
comprised of stock-based compensation expense of $9.8 million, as well as a change in allowance for doubtful accounts and contractual allowance of $9.2
million. The change in our net operating assets and liabilities compared to December 31, 2016 was primarily due to an increase of $12.5 million in the change
in accounts receivable as a result of the increase in our revenue, and an increase of $5.8 million in accrued liabilities, primarily related to increased accrued
payroll and related compensation accruals.

Cash From Investing Activities

Cash  used  in  investing  activities  during  the  year  ended  December  31,  2019  was  $89.3  million,  which  consisted  primarily  of  $165.9  million  in
purchases of available for sale investments and $20.5 million of capital expenditures to purchase property and equipment partially offset by $95.6 million
cash received from the maturities of available for sale investments and $1.5 million in cash received from sales of available for sale investments.

Cash provided by investing activities during the year ended December 31, 2018 was $34.1 million, which consisted of $126.5 million cash received
from the maturities of available for sale investments and $6.0 million in cash received from sales of available for sale investments partially offset by $93.1
million in purchases of investments and $5.2 million of capital expenditures to purchase property and equipment.

Cash used in investing activities during the year ended December 31, 2017 was $34.7 million, which consisted of $129.8 million in purchases of
investments and $3.6 million of capital expenditures to purchase property and equipment, partially offset by maturities of available for sale investments of
$98.7 million.

Cash From Financing Activities

During  the  year  ended  December  31,  2019,  cash  provided  by  financing  activities  was  $111.6  million,  primarily  due  to  $107.4  million  from  the
issuance  of  common  stock  in  a  public  offering,  net  of  discounts  and  issuance  costs  and  $9.5  million  in  proceeds  from  the  issuance  of  common  stock  in
connection with employee option exercises and our Employee Stock Purchase Program. This was partially offset by $5.3 million in tax withholding upon the
vesting of RSUs.

During the year ended December 31, 2018, cash provided by financing activities was $6.3 million, primarily due to proceeds from the issuance of
debt of $35.0 million and $9.3 million in proceeds from the issuance of common stock in connection with employee option exercises and our Employee Stock
Purchase  Program,  partially  offset  by  repayment  of  debt  of  $31.5  million,  $3.9  million  in  tax  withholding  upon  the  vesting  of  RSUs  and  $2.5  million  in
premiums paid on loss on extinguishment of debt.

During  the  year  ended  December  31,  2017,  cash  provided  by  financing  activities  was  $6.5  million,  consisting  primarily  of  net  proceeds  of  $6.4

million from the issuance of common stock related to employee option exercises and our Employee Stock Purchase Program.

Indebtedness

In  December  2015,  we  entered  into  a  Loan  Agreement  with  Biopharma  Secured  Investments  III  Holdings  Cayman  LP  (the  “Pharmakon  Loan
Agreement”). The Pharmakon Loan Agreement provided for up to $55.0 million in term loans split into two tranches as follows: (i) the Tranche A Loans
were $30.0 million in term loans, and (ii) the Tranche B Loans were up to $25.0 million in term loans. The Tranche A Loans were drawn on December 4,
2015. The Tranche B Loans were available to be drawn prior to December 4, 2016. No additional draw was taken.

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The Tranche A Loans bore interest at a fixed rate equal to 9.50% per annum that was due and payable quarterly in arrears. During the first eight

calendar quarters, 50% of the interest due and payable was added to the then outstanding principal.

In December 2015, we used the proceeds from the Pharmakon Loan Agreement to repay $4.9 million of bank debt to SVB. The issuance costs and

debt discount were netted against the borrowed funds on the balance sheet.

On  October  23,  2018,  we  repaid  the  principal  amount  of  the  Tranche  A  Loan  of  $30.0  million  and  related  accrued  interest  of  $3.3  million.  We
incurred a $3.0 million loss in connection with the early extinguishment of the Pharmakon Loan Agreement which included a prepayment premium fee of
$1.0 million and additional consideration related to prepayment of $1.5 million. The debt balance as of December 31, 2017 was $32.5 million.

Bank Debt

In December 2015, we entered into a Second Amended and Restated Loan and Security Agreement with SVB, (the “SVB Loan Agreement”). Under
the  SVB  Loan  Agreement  we  could  borrow,  repay  and  reborrow  under  a  revolving  credit  line,  but  not  in  excess  of  the  maximum  loan  amount  of  $15.0
million, until December 4, 2018, when all outstanding principal and accrued interest became due and payable. Any principal amount outstanding under the
SVB Loan Agreement shall bear interest at a floating rate per annum equal to the rate published by The Wall Street Journal as the “Prime Rate” plus 0.25%.
We may borrow up to 80% of its eligible accounts receivable, up to the maximum of $15.0 million.

In August 2016, we obtained a $3.1 million standby letter of credit pursuant to the SVB Loan Agreement in connection with a lease for the San

Francisco office.

In October 2018, we entered into the Third Amended and Restated Loan and Security Agreement with SVB (“Third Amended and Restated SVB
Loan Agreement”). This Agreement amends and restates the Second Amended and Restated Loan and Security Agreement between the Company and SVB
dated December 4, 2015, as amended by the First Loan Modification Agreement between the Company and SVB dated August 22, 2016.

Pursuant to the Third Amended and Restated SVB Loan Agreement, we obtained a term loan (“SVB Term Loan”) for $35.0 million. Total proceeds
from the SVB Term Loan were used to pay off the loan agreement with Biopharma Secured Investments III Holdings Cayman LP (“Pharmakon”), totaling
$35.8 million. We will make interest-only payments through October 31, 2020, followed by 36 monthly payments of principal plus interest on the SVB Term
Loan. Interest charged on the SVB Term Loan will be the greater of (a) a floating rate based on the “Prime Rate” published by The Wall Street Journal minus
0.75%, or (b) 4.25%.

Under the Third Amended and Restated SVB Loan Agreement, we may borrow, repay, and reborrow under a revolving credit line, but not in excess
of the maximum loan amount of $25.0 million, which includes an $11.0 million standby letter of credit sublimit availability. In October 2018, a $6.9 million
standby  letter  of  credit  was  obtained  in  connection  with  a  lease  for  our  San  Francisco  headquarters.  Any  principal  amount  outstanding  under  the  Third
Amended and Restated SVB Loan Agreement revolving credit line shall bear interest at an amount that is the greater of (a) a floating rate per annum equal to
the  rate  published  by  The  Wall  Street  Journal  as  the  “Prime  Rate”  or  (b)  5.00%.  We  may  borrow  up  to  75%  of  eligible  accounts  receivable,  up  to  the
maximum of $25.0 million. As of December 31, 2019 we were eligible to borrow up to $5.6 million and no amount was outstanding under the revolving
credit line.

The Third Amended and Restated Loan Agreement requires us to maintain a minimum consolidated liquidity ratio or minimum adjusted Earnings
Before  Interest,  Tax,  Depreciation,  and  Amortization  during  the  term  of  the  loan  facility.  In  addition,  the  SVB  Loan  Agreement  contains  customary
affirmative and negative covenants and events of default. We were in compliance with loan covenants as of December 31, 2019. The obligations under the
Third Amended and Restated Loan Agreement are collateralized by substantially all of our assets.

California HealthCare Foundation Note

In  November  2012,  we  entered  into  a  Note  Purchase  Agreement  and  Promissory  Note  with  the  California  HealthCare  Foundation  (the  “CHCF
Note”) through which we borrowed $1.5 million. The CHCF Note accrued simple interest of 2.0%. The accrued interest and the principal was to mature in
November  2016.  In  partial  consideration  for  the  issuance  of  the  CHCF  Note,  we  issued  warrants  to  purchase  22,807  shares  of  the  Company’s  Series  D
convertible preferred stock.

In June 2015, we amended the CHCF Note to extend the maturity date to May 2018.

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The CHCF Note was subordinate to other debt. The debt balance, net of debt discount, as of December 31, 2017 was $1.5 million. In May 2018, we

repaid the principal amount of $1.5 million and related $0.2 million in accrued interest on the CHCF Note.

Critical Accounting Policies and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been
prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”). The preparation of these financial statements requires
our  management  to  make  judgments  and  estimates  that  affect  the  reported  amounts  of  assets  and  liabilities  and  the  disclosure  of  contingent  assets  and
liabilities at the date of the financial statements, as well as the reported revenue generated and expenses incurred during the reporting periods. Our estimates
are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis
for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these
judgments  and  estimates  under  different  assumptions  or  conditions  and  any  such  differences  may  be  material.  We  believe  that  the  accounting  policies
discussed  below  are  critical  to  understanding  our  historical  and  future  performance,  as  these  policies  relate  to  the  more  significant  areas  involving
management’s judgments and estimates.

Revenue Recognition

Our  Zio  XT  monitor,  a  wearable  patch-based  biosensor,  continuously  records  and  stores  ECG  data  from  every  patient  heartbeat  for  up  to  14
consecutive days. The Zio XT monitor is returned to our monitoring facility and the heartbeat data is curated and analyzed by our proprietary algorithms and
reviewed by our certified cardiac technicians. The final step in the Zio service is the delivery of an electronic Zio Report to the prescribing physician with a
summary of findings. Our Zio XT service is generally billable when the Zio Report is issued to the physician.

Our  Zio  AT  mobile  cardiac  telemetry  monitor,  a  wearable  patch-based  biosensor,  offers  what  our  Zio  XT  offers  plus  the  additional  capability  of
transmissions  during  the  wear  period  to  assist  physicians  in  diagnosing  and  treating  the  small  percentage  of  the  population  requiring  more  timely  action.
During the wear period, physicians will receive notifications if there are significant events that meet predetermined arrhythmia detection criteria. Our Zio AT
service revenue is recognized over the prescription period and delivery of an electronic Zio Report.

We adopted Accounting Standard Codification Topic 606, Revenue from Contracts with Customers (“ASC 606”), on January 1, 2018. We recognized
revenue  in  prior  years  in  accordance  with  Accounting  Standard  Codification  Topic  954-605,  Health  Care  Entities  -  Revenue  Recognition  and  Accounting
Standard Codification Topic 605, Revenue Recognition.

We account for contract revenue with a customer when there is a legally enforceable contract between us and the customer, the rights of the parties
are  identified,  the  contract  has  commercial  substance,  and  collectability  of  the  contract  consideration  is  probable.  Our  revenue  is  measured  based  on
consideration specified in the contract with each customer. A unique aspect of healthcare is the involvement of multiple parties to the service transaction. In
addition to the patient, often a third-party, for example a commercial or governmental payor or healthcare institution, like a hospital or clinic, will pay us for
some or all of the service on the patient’s behalf. Separate contractual arrangements exist between us and many third-party payors that establish amounts the
third-party payor will pay on behalf of a patient for covered services rendered and should be considered in determining collectability and the transaction price
for services provided to a patient covered by that third-party payor.

We  recognize  revenue  on  an  accrual  basis  based  on  estimates  of  the  amount  that  will  ultimately  be  realized,  which  is  the  difference  between  the
amount submitted for payment and the amount received. These estimates require significant judgment by management. In determining the amount to accrue
for a delivered report, we consider factors such as claim payment history from both payors and patient out-of-pocket costs, payor coverage, whether there is a
contract between the payor or healthcare institution and us, historical amount received for the service, and any current developments or changes that could
impact reimbursement and healthcare institution payments.

A summary of the payment arrangements with third-party payors and healthcare institutions is as follows:

•

Contracted third-party payors – We have contracts with negotiated prices for services provided for patients with commercial healthcare
insurance carriers

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•

•

•

Centers for Medicare and Medicaid Services (“CMS”) – We have received independent diagnostic testing facility approval from regional
Medicare Administrative Contractors and will receive reimbursement per the relevant Current Procedural Terminology (“CPT”) code rate
for the services rendered to the patient covered by CMS.

Non-contracted third-party payors: Non-contracted commercial and government payors often reimburse out-of-network rates provided
under the relevant CPT codes on a case-by-case basis. The transaction price used for determining revenue recognition is based on factors
including an average of our historical collection experience for our non-contracted services. This rate is reviewed at least quarterly.

Healthcare institutions – Healthcare institutions are typically hospitals or physician practices in which we have negotiated amounts for its
monitoring services, including certain governmental agencies such as the Veteran’s Administration and Department of Defense.

We  are  utilizing  the  portfolio  approach  practical  expedient  under  ASC  606  for  revenue  recognition.  We  account  for  the  contracts  within  each
portfolio as a collective group, rather than individual contracts. Based on history with these portfolios and the similar nature and characteristics of the patients
within  each  portfolio,  we  have  concluded  that  the  financial  statement  effects  are  not  materially  different  than  if  accounting  for  revenue  on  a  contract-by-
contract basis.

For  the  healthcare  institutions,  we  have  historical  experience  of  collecting  substantially  all  of  the  negotiated  contractual  rates  and  determined  at
contract inception that these customers, and or their related third-party payor that pays us on their behalf, have the intention and ability to pay the promised
consideration.  As  such,  we  have  not  provided  an  implicit  price  concession  but,  rather,  have  chosen  to  accept  the  risk  of  default,  and  adjustments  to  the
transaction price are recorded as bad debt expense.

For contracted and CMS portfolios, we are providing an implicit price concession because, while we have a contract with the underlying payor, we
expect to accept a lower amount of consideration when claims are adjudicated and allowable claims are determined by the commercial payor. The implicit
price concession is recorded as variable consideration to the transaction price and recorded as an adjustment to revenue as a contractual allowance. Historical
cash collection indicates that it is probable that substantially all of the contracted claim amount will be received. We provide for estimates of uncollectible
patient accounts receivable, based upon historical experience, at the time revenue is recognized, with such provisions presented as bad debt expense within
the selling, general and administrative line item of the consolidated statement of operations. Adjustments to these estimates for actual experience are also
recorded as an adjustment to bad debt expense.

For non-contracted portfolios, we are providing an implicit price concession because we do not have a contract with the underlying payor, the result
of  which  requires  us  to  estimate  transaction  price  based  on  historical  cash  collections  utilizing  the  expected  value  method.  Subsequent  adjustments  to  the
transaction price are recorded as an adjustment to revenue and not as bad debt expense.

Allowance for Doubtful Accounts and Contractual Allowance

We  establish  an  allowance  for  doubtful  accounts  for  estimated  uncollectible  receivables  based  on  our  historical  collections,  review  of  specific
outstanding claims, consideration of relevant qualitative factors and an established allowance percentage by aging category. We write off outstanding accounts
against the allowance for doubtful accounts when they are deemed to be uncollectible. Increases and decreases in the allowance for doubtful accounts are
included  as  a  component  of  general  and  administrative  expenses.  We  record  reductions  in  revenue  for  estimated  uncollectible  amounts  as  contractual
allowances.

We  review  and  update  our  estimates  for  the  allowance  for  doubtful  accounts  and  the  contractual  allowance  periodically  to  reflect  our  experience
regarding  historical  collections.  If  we  were  to  make  different  judgments  or  utilize  different  estimates  in  the  allowance  for  doubtful  accounts  and  the
contractual allowance, differences in both the amount of reported general and administrative expenses and revenue could result.

Estimated Usage of the Printed Circuit Board Assembly

We use a printed circuit board assembly (“PCBA”) in each Zio XT and Zio AT wearable device and a gateway board in Zio AT device. These boards
are reused numerous times in multiple patients. Each time the PCBA and gateway board is used in a wearable Zio XT and Zio AT monitor, a portion of the
cost of the PCBA and gateway board is recorded as a cost of revenue. We have based our estimates of how many times a PCBA and gateway board can be
used on testing in research and

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development,  loss  rates,  product  obsolescence,  and  the  amount  of  time  it  takes  the  device  to  go  through  the  manufacturing,  shipping,  customer  shelf  and
patient wear time and upload process. We periodically evaluate the use estimate.

Stock-Based Compensation

We recognize compensation costs related to stock option grants, restricted stock unit grants (“RSUs”), and shares under the employee stock purchase
program (“ESPP”) based on the estimated fair value of the awards on the date of grant, net of estimated forfeitures. We estimate the grant date fair value, and
the resulting stock-based compensation expense for options and shares under the ESPP, using the Black-Scholes option pricing model. The RSU grant date
fair value is based on the closing price on the date of the grant. The grant date fair value of stock-based awards is expensed on a straight-line basis over the
period during which the employee is required to provide service in exchange for the award (generally the vesting period).

We estimate the fair value of our stock-based awards using the Black-Scholes option-pricing model, which requires the input of highly subjective

assumptions. Our assumptions are as follows:

•

•

•

•

Expected term. The expected term represents the period that the stock-based awards are expected to be outstanding. We use the simplified
method to determine the expected term, which is calculated as the average of the time to vesting and the contractual life of the options.

Expected volatility. As our common stock has been publicly traded for a limited time, the expected volatility is derived from the average
historical  volatilities  of  publicly  traded  companies  within  our  industry  that  we  consider  to  be  comparable  to  our  business  over  a  period
approximately equal to the expected term for employees’ options and the remaining contractual life for nonemployees’ options.

Risk-free interest rate. The risk-free interest rate is based on the U.S. Treasury yield with a maturity equal to the expected term of the option
in effect at the time of grant.

Dividend  yield.  The  expected  dividend  is  assumed  to  be  zero  as  we  have  never  paid  dividends  and  have  no  current  plans  to  pay  any
dividends on our common stock.

In  addition  to  the  assumptions  used  in  the  Black-Scholes  option-pricing  model,  we  also  estimate  a  forfeiture  rate  to  calculate  the  stock-based
compensation for our equity awards. We will continue to use judgment in evaluating the expected volatility, expected terms and forfeiture rates utilized for
our stock-based compensation calculations on a prospective basis.

Stock-based  compensation  expense  for  options  granted  to  non-employees  as  consideration  for  services  received  is  measured  on  the  date  of
performance at the fair value of the consideration received or the fair value of the equity instruments issued, using the Black-Scholes option-pricing model,
whichever  can  be  more  reliably  measured.  Stock-based  compensation  expense  for  options  granted  to  non-employees  is  periodically  re-measured  as  the
underlying options vest.

We recognize compensation expense related to restricted stock units based on the grant date fair value on a straight-line basis over the period during

which the employee is required to provide service in exchange for the award (generally the vesting period).

We recognize compensation expense related to the Employee Stock Purchase Program (“ESPP”) based on the estimated fair value of the options on
the date of grant, net of estimated forfeitures. We estimate the grant date fair value, and the resulting stock-based compensation expense, using the Black-
Scholes option pricing model for each purchase period. The grant date fair value is expensed on a straight-line basis over the offering period.

We recorded stock-based compensation expense of $26.2 million, $16.3 million and $9.8 million for the years ended December 31, 2019, 2018 and
2017,  respectively.  We  expect  to  continue  to  grant  RSUs  and  other  equity-based  awards  in  the  future,  and  to  the  extent  that  we  do,  our  stock-based
compensation expense recognized in future periods will likely increase.

Recently Adopted Accounting Guidance

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-2, Leases (“Topic
842”), which requires lessees to recognize lease liabilities and corresponding right-of-use assets on the consolidated balance sheet for all leases. For finance
leases, the lessee would recognize interest expense and amortization of the right-of-use asset and, for operating leases, the lessee would recognize a straight-
line lease expense. As of December 31, 2019, the Company does not have any finance leases. Topic 842 also changes the definition of a lease and expands the
disclosure requirements of lease arrangements. The Company has no embedded leases with suppliers. Upon adoption of Topic

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842 on January 1, 2019 using the modified retrospective method, the Company recognized right-of-use assets of $10.2 million and lease liabilities of $10.0
million. There was no cumulative-effect adjustment recorded on January 1, 2019. The Company adopted the following practical expedients allowed under
Topic 842:

•

•

•

The  package  of  three  practical  expedients,  which  allows  entities  to  make  an  election  that  allows  them  not  to  reassess  (1)  whether
existing or expired contracts contain embedded leases under Topic 842, (2) lease classification of existing or expiring leases, and (3)
indirect costs for existing or expired leases;

Combining  lease  and  non-lease  components  practical  expedient,  which  allows  lessees,  as  an  accounting  policy  election  by  class  of
underlying asset, to choose not to separate non-lease components from lease components and instead to account for each separate lease
component and the non-lease components associated with that lease component as a single lease component; and

Comparative  reporting  practical  expedient,  which  allows  entities  to  initially  apply  Topic  842  at  the  adoption  date  and  recognize  a
cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption.

For further details, refer to Note 6. Commitments and Contingencies.

Recent Accounting Standards or Updates Not Yet Effective

In  June  2016,  the  FASB  issued  ASU  No.  2016-13,  Financial  Instruments-Credit  Losses  (Topic  326):  Measurement  of  Credit  Losses  on  Financial
Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost, including trade receivables.
ASU No. 2016-13 replaces the existing incurred loss impairment model with an expected loss model that requires the use of forward-looking information to
calculate credit loss estimates. It also eliminates the concept of other-than-temporary impairment and requires credit losses related to available-for-sale debt
securities to be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. The Company will
adopt this standard in the first quarter of fiscal 2020 and is evaluating the impact of adopting this amendment to its consolidated financial statements.

In  August  2018,  the  FASB  issued  ASU  No.  2018-15,  Intangibles-Goodwill  and  Other-Internal-Use  Software  (Subtopic  350-40):  Customer’s
Accounting  for  Implementation  Costs  Incurred  in  a  Cloud  Computing  Arrangement  that  is  a  Service  Contract,  which  amended  its  guidance  for  costs  of
implementing a cloud computing service arrangement to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is
a  service  contract  with  the  requirements  for  capitalizing  implementation  costs  incurred  to  develop  or  obtain  internal-use  software.  This  new  standard  also
requires  customers  to  expense  the  capitalized  implementation  costs  of  a  hosting  arrangement  that  is  a  service  contract  over  the  term  of  the  hosting
arrangement. This new standard becomes effective for the Company in the first quarter of fiscal year 2020, with early adoption permitted. This new standard
can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is evaluating the impact of
adopting this amendment to its consolidated financial statements.

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies
the accounting for income taxes by removing certain exceptions to the general principles for income taxes. ASU 2019-12 will be effective for us beginning
January 1, 2021, and early adoption is permitted. The Company is currently evaluating the impact of adoption on our consolidated financial statements.

Off-Balance Sheet Arrangements

We have not entered into any off-balance sheet arrangements and do not have any holdings in variable interest entities.

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Contractual Obligations

Debt interest payments (1)
Debt principal payments

Operating leases

Total contractual obligations

Less Than
1 Year

1 to 3
Years

Payments Due by Period
3 to 5
Years

More Than
5 Years

1,505    $

1,885    $

191    $

1,944    $

23,333    $

9,723    $

—    $

—    $

Total

3,581   

35,000   

9,253    $

22,880    $

23,682    $

87,793    $

143,608   

12,702    $

48,098    $

33,596    $

87,793    $

182,189   

$

$

$

$

________________________________
(1)

Debt interest payments calculated based on interest rates in effect as of December 31, 2019

The  table  above  does  not  include  approximately  $1.1  million  in  non-cancelable  purchase  orders  related  to  inventory  and  printed  circuit  board
assemblies entered into in the normal course of operations, which we expect to be paid in less than one year. The table excludes unrecognized tax benefits of
$1.8 million as of December 31, 2019 because these uncertain tax positions, if recognized, would be an adjustment to our net deferred tax assets.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

We  are  exposed  to  market  risks  in  the  ordinary  course  of  our  business.  These  risks  primarily  include  risk  related  to  interest  rate  sensitivities  and

foreign currency exchange rate sensitivity.

Interest Rate Sensitivity

We had cash, cash equivalents and investments of $148.6 million as of December 31, 2019; which consisted of bank deposits, money market funds
and  U.S.  government  securities,  corporate  notes,  and  commercial  paper.  Such  interest-earning  instruments  carry  a  degree  of  interest  rate  risk;  however,
historical fluctuations in interest income have not been significant.

We do not enter into investments for trading or speculative purposes and have not used any derivative financial instruments to manage our interest
rate  risk  exposure.  We  have  not  been  exposed  nor  do  we  anticipate  being  exposed  to  material  risks  due  to  changes  in  interest  rates.  A  hypothetical  10%
change in interest rates during any of the periods presented would not have had a material impact on our consolidated financial statements.

For the years ended December 31, 2019 and 2018 we had total outstanding debt of $34.9 million, respectively, which is net of debt issuance costs.
The Third Amended and Restated SVB Loan Agreement Note carries a variable interest rate based on the “Prime Rate” published by The Wall Street Journal.
A  hypothetical  10%  change  in  interest  rates  during  any  of  the  periods  presented  would  not  have  had  a  material  impact  on  our  consolidated  financial
statements.

Foreign Currency Exchange Rate Sensitivity

We  face  foreign  exchange  risk  as  a  result  of  entering  into  transactions  denominated  in  currencies  other  than  U.S.  dollars,  particularly  in  British
Pound Sterling. As of December 31, 2019, we do not consider this risk to be material. We do not utilize any forward foreign exchange contracts. All foreign
transactions settle on the applicable spot exchange basis at the time such payments are made.

Item 8. Financial Statements and Supplementary Data.

IRHYTHM TECHNOLOGIES, INC.

Index to Financial Statements
Report of Independent Registered Public Accounting Firm
Financial Statements

Consolidated Balance Sheets
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Loss
Consolidated Statements of Stockholders’ Equity
Consolidated Statements of Cash Flows
Notes to the Consolidated Financial Statements

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Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of iRhythm Technologies, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of iRhythm Technologies, Inc. and its subsidiary (the “Company”) as of December 31, 2019
and 2018, and the related consolidated statements of operations, of comprehensive loss, of stockholders' equity and of cash flows for each of the three years in
the period ended December 31, 2019, including the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the
Company's internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013)
issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In  our  opinion,  the  consolidated  financial  statements  referred  to  above  present  fairly,  in  all  material  respects,  the  financial  position  of  the  Company  as  of
December  31,  2019  and  2018,  and  the  results  of  its  operations  and  its  cash  flows  for  each  of  the  three  years  in  the  period  ended  December  31,  2019  in
conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company did not maintain, in all material
respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework
(2013) issued by the COSO because material weaknesses in internal control over financial reporting existed as of that date related to (i) an ineffective control
environment commensurate with the Company’s financial reporting requirements, due to an insufficient number of professionals with an appropriate level of
accounting  and  internal  control  knowledge,  training  and  experience,  (ii)  an  ineffective  financial  statement  close  process,  due  to  an  ineffective  business
performance review to monitor the completeness and accuracy of the financial results and an ineffective review of journal entries, and (iii) ineffective controls
with respect to the review of the accounting for revenue and related accounts receivable, including maintaining effective controls to prevent or detect errors in
the assessment of bad debt and revenue reserves.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility
that  a  material  misstatement  of  the  annual  or  interim  financial  statements  will  not  be  prevented  or  detected  on  a  timely  basis.  The  material  weaknesses
referred to above are described in Management’s Annual Report on Internal Control Over Financial Reporting appearing under Item 9A. We considered these
material weaknesses in determining the nature, timing, and extent of audit tests applied in our audit of the 2019 consolidated financial statements, and our
opinion  regarding  the  effectiveness  of  the  Company’s  internal  control  over  financial  reporting  does  not  affect  our  opinion  on  those  consolidated  financial
statements.

Changes in Accounting Principles

As discussed in Note 2 to the consolidated financial statements, the Company changed the manner in which it accounts for leases in 2019 and the manner in
which it accounts for revenues from contracts with customers in 2018.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and
for its assessment of the effectiveness of internal control over financial reporting, included in management's report referred to above. Our responsibility is to
express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting 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 audits to obtain reasonable
assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal
control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated 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 consolidated 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 consolidated financial statements. Our audit of internal
control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness
exists, and testing and evaluating the design and operating effectiveness of internal control based

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on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits
provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed 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. A company’s internal control over
financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect
the  transactions  and  dispositions  of  the  assets  of  the  company;  (ii)  provide  reasonable  assurance  that  transactions  are  recorded  as  necessary  to  permit
preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being
made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or
timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance
with the policies or procedures may deteriorate.

Critical Audit Matters

The  critical  audit  matter  communicated  below  is  a  matter  arising  from  the  current  period  audit  of  the  consolidated  financial  statements  that  was
communicated  or  required  to  be  communicated  to  the  audit  committee  and  that  (i)  relates  to  accounts  or  disclosures  that  are  material  to  the  consolidated
financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter
in  any  way  our  opinion  on  the  consolidated  financial  statements,  taken  as  a  whole,  and  we  are  not,  by  communicating  the  critical  audit  matter  below,
providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Contractual Allowance and Allowance for Doubtful Accounts – Contracted Third-Party Payors

As described in Note 2 to the consolidated financial statements, a large part of the Company’s transactions are covered by third-party payors with whom there
is  a  contractual  agreement  or  established  amount  the  third-party  payor  will  pay  (contracted  third-party  payors).  These  contracts  impose  a  number  of
obligations regarding billing and other matters, and the Company’s noncompliance with a material term of such contracts may result in a denial of the claim.
The Company recognizes revenue from contracted third-party payors, net of contractual allowances, and recognizes an allowance for doubtful accounts for
uncollectible  patient  accounts  receivable.  As  of  December  31,  2019,  the  Company’s  contractual  allowance  balance  was  $15.4  million  and  allowance  for
doubtful accounts balance was $9.0 million, a significant portion of which relates to revenue from services provided to patients insured by contracted third-
party payors. Management accounts for denied claims as a form of variable consideration that is included as a reduction to the transaction price and recorded
as an adjustment to revenue as a contractual allowance. Management accounts for the allowance for doubtful accounts at the time revenue is recognized, with
such provisions presented as bad debt expense within selling, general and administrative expenses. The estimated denied claims and uncollectible receivables
are based on historical information which require significant judgment by management in determining which historical period is used.

The principal considerations for our determination that performing procedures relating to the contractual allowances and allowance for doubtful accounts for
contracted  third-party  payors  is  a  critical  audit  matter  are  there  was  significant  judgment  by  management  in  developing  estimates  of  the  contractual
allowances and allowance for doubtful accounts. This in turn led to a high degree of auditor subjectivity, judgment, and effort in performing procedures and
evaluating  the  audit  evidence  obtained  related  to  management’s  estimates  of  the  contractual  allowances  and  allowance  for  doubtful  accounts,  including
management’s judgments regarding the historical period used on which to base the estimate. As described in the “Opinions on the Financial Statements and
Internal Control over Financial Reporting” section, a material weakness was identified related to this matter.

Addressing  the  matter  involved  performing  procedures  and  evaluating  audit  evidence  in  connection  with  forming  our  overall  opinion  on  the  consolidated
financial statements. The procedures included, among others, (i) evaluating management’s process for developing estimates of the contractual allowances and
allowance  for  doubtful  accounts,  including  comparing  the  historical  period  used  by  management  with  reasonable  alternative  historical  periods  based  on
current  and  past  history  of  denied  claims  and  uncollectible  amounts,  (ii)  testing  the  completeness  and  accuracy  of  the  historical  information  used  by
management  in  the  estimate,  by  testing  a  sample  of  transactions,  and  (iii)  developing  an  independent  expectation  of  denied  claims  and  uncollectible
receivables based on information through a subsequent period.

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/s/ PricewaterhouseCoopers LLP
San Jose, California
March 2, 2020

We have served as the Company’s auditor since 2009.

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IRHYTHM TECHNOLOGIES, INC.

Consolidated Balance Sheets
(In thousands, except par value and share data)

Table of Contents

Assets

Current assets:

Cash and cash equivalents

Short-term investments

Accounts receivable, net

Inventory

Prepaid expenses and other current assets

Total current assets

Long-term investments

Property and equipment, net

Operating lease right-of-use assets

Goodwill

Other assets

Total assets

Liabilities and Stockholders’ Equity

Current liabilities:

Accounts payable

Accrued liabilities

Deferred revenue

Debt, current portion

Accrued interest

Operating lease liabilities, current portion

Total current liabilities

Debt, noncurrent portion

Deferred rent, noncurrent portion

Operating lease liabilities, noncurrent portion

Total liabilities

Commitments and contingencies (Note 6)

Stockholders’ equity:

Preferred stock, $0.001 par value – 5,000,000 shares authorized at December 31, 2019 and 2018; and none issued

and outstanding at December 31, 2019 and 2018, respectively

Common stock, $0.001 par value – 100,000,000 shares authorized at December 31, 2019 and 2018; 26,682,720 and

24,368,073 shares issued and outstanding at December 31, 2019 and 2018, respectively

Additional paid-in capital

Accumulated other comprehensive income (loss)

Accumulated deficit

Total stockholders’ equity

Total liabilities and stockholders’ equity

December 31,

2019

2018

$

20,462    $

120,089   

23,867   

4,037   

4,337   

20,023   

58,320   

19,790   

2,062   

4,100   

172,792   

104,295   

$

$

8,030   

26,464   

90,124   

862   

7,940   

—   

9,158   

—   

862   

3,208   

306,212    $

117,523   

8,243    $

32,586   

1,251   

1,944   

128   

7,914   

52,066   

32,989   

—   

85,748   

170,803   

—   

25   

395,695   

82   

(260,393)  

135,409   

2,284   

26,688   

1,223   

—   

139   

—   

30,334   

34,899   

153   

—   

65,386   

—   

23   

257,955   

(16)  

(205,825)  

52,137   

$

306,212    $

117,523   

The accompanying notes are an integral part of these consolidated financial statements.

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Revenue

Cost of revenue

Gross profit

Operating expenses:

Research and development

Selling, general and administrative

Total operating expenses

Loss from operations

Interest expense

Other income, net

Loss on extinguishment of debt

Loss before income taxes

Income tax provision

Net loss

Net loss per common share, basic and diluted

Weighted-average shares, basic and diluted

IRHYTHM TECHNOLOGIES, INC.

Consolidated Statements of Operations

(In thousands, except share and per share data)

Year Ended December 31,

2019
214,552    $

2018
147,277    $

$

52,485   

162,067   

37,299   

179,523   

216,822   

(54,755)  

(1,643)  

1,895   

—   

38,795   

108,482   

20,860   

133,313   

154,173   

(45,691)  

(3,115)  

1,501   

(3,029)  

2017

99,129   

28,203   

70,926   

13,265   

85,252   

98,517   

(27,591)  

(3,386)  

1,237   

—   

(54,503)  

(50,334)  

(29,740)  

65   

44   

—   

(54,568)   $

(50,378)   $

(29,740)  

(2.16)   $

(2.11)   $

(1.31)  

$

$

25,265,918   

23,885,858   

22,627,327   

The accompanying notes are an integral part of these consolidated financial statements.

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IRHYTHM TECHNOLOGIES, INC.

Consolidated Statements of Comprehensive Loss

(In thousands)

Net loss

Other comprehensive income (loss):

Net change in unrealized gains (losses) on available-for-sale securities

Comprehensive loss

Year Ended December 31,

2019
(54,568)   $

2018
(50,378)   $

2017
(29,740)  

98   

49   

(56)  

(54,470)   $

(50,329)   $

(29,796)  

$

$

The accompanying notes are an integral part of these consolidated financial statements.

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IRHYTHM TECHNOLOGIES, INC.

Consolidated Statements of Stockholders’ Equity
(In thousands, except share and per share data)

Balances at December 31, 2016

22,139,346    $

22    $

Common Stock

Shares

Amount

Additional
Paid-In
Capital
220,089    $

Accumulated
Deficit
(127,061)   $

Accumulated
Other
Comprehensive
Income (Loss)

Total
Stockholders’
Equity

(9)   $

93,041   

Issuance of common stock in connection with
employee equity incentive plans, net

Issuance of preferred stock upon exercise of

warrants
Tax withholding upon vesting of restricted stock
awards

Stock-based compensation expense

Net loss

Net change in unrealized loss on investments

1,027,595   

210,374   

—   

—   

—   

—   

Balances at December 31, 2017

23,377,315   

Accounting Standards Codification 606
cumulative effect adjustment upon adoption

Issuance of common stock in connection with
employee equity incentive plans, net

Tax withholding upon vesting of restricted stock

awards

Stock-based compensation expense

Net loss

Net change in unrealized loss on investments

990,758   

—   

—   

—   

—   

Balances at December 31, 2018

24,368,073   

Issuance of common stock in connection with
employee equity incentive plans

Warrants exercised

Issuance of common stock in connection with

follow-on public offering, net of issuance costs
Tax withholding upon vesting of restricted stock
awards

Stock-based compensation expense

Net loss

Net change in unrealized loss on investments

Balances at December 31, 2019

734,453   

4,852   

1,575,342

—   

—   

—   

—   

1   

—   

—   

—   

—   

—   

23   

—   

—   

—   

—   

—   

—   

23   

—   

—   

2   

—   

—   

—   

6,389   

—   

(46)  

9,752   

—   

—   

—   

—   

—   

—   

(29,740)  

—   

236,184   

(156,801)  

—   

1,354   

9,319   

(3,877)  

16,329   

—   

—   

—   

—   

—   

(50,378)  

—   

257,955   

(205,825)  

9,495   

—   

107,292   

(5,288)  

26,241   

—   

—   

—   

—   

—   

—   

(54,568)  

—   

—   

—   

—   

—   

—   

(56)  

(65)  

—   

—   

—   

—   

—   

49   

(16)  

—   

—   

—   

—   

—   

98   

6,390   

—   

(46)  

9,752   

(29,740)  

(56)  

79,341   

1,354   

9,319   

(3,877)  

16,329   

(50,378)  

49   

52,137   

9,495   

—   

107,294   

(5,288)  

26,241   

(54,568)  

98   

26,682,720 $

25    $

395,695    $

(260,393)   $

82    $

135,409   

The accompanying notes are an integral part of these consolidated financial statements.

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IRHYTHM TECHNOLOGIES, INC.

Consolidated Statements of Cash Flows
(In thousands)

Cash flows from operating activities

Net loss

Adjustments to reconcile net loss to net cash used in operating activities:

Depreciation and amortization

Stock-based compensation

Amortization of debt discount and issuance costs

Accretion of discounts on investments, net of premium amortization

Loss on disposal of assets

Provision for bad debt and contractual allowance

Non-cash interest expense

Loss on extinguishment of debt

Repayment of interest paid in kind

Cost of operating lease right-of-use assets

Changes in operating assets and liabilities:

Accounts receivable

Inventory

Prepaid expenses and other current assets

Other assets

Accounts payable

Accrued liabilities

Deferred rent

Deferred revenue

Operating lease liabilities

Net cash used in operating activities

Cash flows from investing activities

Purchases of property and equipment

Purchases of available-for-sale investments

Sales of available-for-sale investments

Maturities of available-for-sale investments

Net cash provided by (used in) investing activities

Cash flows from financing activities

Issuance of common stock in connection with follow-on public offering, net
Proceeds from issuance of common stock

Tax withholding upon vesting of restricted stock awards

Payments of deferred offering costs

Proceeds from long-term debt, net of debt discount

Repayments of long-term debt

Payments of issuance costs for long term debt

Premiums paid on extinguishment of debt

Net cash provided by financing activities

Net increase (decrease) in cash and cash equivalents

Cash and cash equivalents, beginning of year

Cash and cash equivalents, end of  year

Supplemental disclosures of cash flow information

Interest paid

Non-cash investing and financing activities

Property and equipment included in accounts payable and accrued liabilities

Deferred offering costs included in accounts payable and accrued liabilities

Right-of-use assets obtained in exchange for new operating lease liabilities

Year Ended December 31,

2019

2018

2017

$

(54,568)   $

(50,378)   $

(29,740)  

3,445   

26,241   

37   

(884)  

—   

24,647   

—   

—   

—   
8,953   

(28,725)  

(1,974)  

(696)  

(4,732)  

5,604   

6,002   

—   

28   

(5,241)  

(21,863)  

(20,457)  

(165,915)  

1,498   

95,600   

(89,274)  

107,369   

9,495   

(5,288)  

—   

—   

—   

—   

—   

111,576   

439   

20,023   

2,269   

16,329   

210   

(907)  

75   

16,448   

—   

3,029   

(3,141)  

—   

(21,747)  

(380)  

(1,568)  

269   

(192)  

10,501   

105   

(15)  

—   

1,597   

9,752   

260   

(352)  

9   

9,222   

1,550   

—   

—   

—   

(12,471)  

(293)  

(795)  

(467)  

634   

5,757   

135   

291   

—   

(29,093)  

(14,911)  

(5,180)  

(93,133)  

5,962   

126,493   

34,142   

—   

9,319   

(3,877)  

—   

35,000   

(31,500)  

(121)  

(2,518)  

6,303   

11,352   

8,671   

(3,562)  

(129,829)  

—   

98,707   

(34,684)  

—   

6,390   

(46)  

188   

—   

—   

—   

—   

6,532   

(43,063)  

51,734   

8,671   

$

$

$

$

$

20,462    $

20,023    $

1,644    $

6,065    $

1,550   

293    $

77    $

88,860    $

101    $

—    $

—    $

110   

—   

—   

The accompanying notes are an integral part of these consolidated financial statements.

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1. Organization and Description of Business

IRHYTHM TECHNOLOGIES, INC.

Notes to Consolidated Financial Statements

iRhythm Technologies, Inc. (the “Company”) was incorporated in the state of Delaware in September 2006. The Company is a digital healthcare
company redefining the way cardiac arrhythmias are clinically diagnosed by combining wearable biosensing technology with cloud-based data analytics and
deep-learning  capabilities.  The  Company  began  commercial  operations  in  the  United  States  in  2009  following  clearance  by  the  U.S.  Food  and  Drug
Administration.

The Company is headquartered in San Francisco, California, which also serves as a clinical center. The Company has additional clinical centers in
Lincolnshire,  Illinois  and  Houston,  Texas  and  a  manufacturing  facility  in  Cypress,  California.  In  March  2016,  the  Company  formed  a  wholly-owned
subsidiary  in  the  United  Kingdom.  The  Company  manages  its  operations  as  a  single  operating  segment.  Substantially  all  of  the  Company’s  assets  are
maintained in the United States. The Company derives substantially all of its revenue from sales to customers in the United States.

On September 10, 2019, the Company issued and sold an aggregate of 1,575,342 shares (the "Shares") of common stock, in a public offering at a
price of $73.00 per share. The Shares included the full exercise of the underwriters’ option to purchase an additional 205,479 shares of common stock. Total
proceeds received from the offering were $107.3 million, net of issuance costs.

Revision of Prior Period Financial Statements

In 2019, and as previously disclosed in the Company’s Quarterly Report on Form 10-Q for the three and nine-months ended September 30, 2019,
the Company identified errors in its historical accounting for revenues, contractual allowances, allowance for doubtful accounts and certain other items. The
identified errors impacted the Company's accompanying 2017 annual financial statements, 2018 unaudited quarterly and annual financial statements and its
2019  unaudited  first  and  second  quarter  financial  statements.  In  accordance  with  SEC  Staff  Accounting  Bulletin  No.  99,  "Materiality,"  and  SEC  Staff
Accounting Bulletin No. 108,"Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements;"
the  Company  evaluated  the  errors  and  determined  that  the  related  impacts  were  not  material  to  any  prior  annual  or  interim  period,  but  that  correcting  the
cumulative impact of such errors would be significant to our results of operations for the three and nine months ended September 30, 2019 and the year-ended
December 31, 2019. Accordingly, the Company has revised the accompanying 2018 and 2017 annual consolidated financial statements to correct for such
immaterial errors. A summary of the impact of the revisions to our previously issued annual financial statements is included in Note 14, Revision of Prior
Period  Financial  Statements.  Further,  a  summary  of  the  impact  of  the  revisions  on  the  unaudited  quarterly  financial  data  is  included  in  Note  13.  Selected
Quarterly Financial Data (unaudited). The affected balances in the accompanying footnotes to these consolidated financial statements have also been revised
accordingly.

2. Summary of Significant Accounting Policies

Basis of Presentation

The  accompanying  consolidated  financial  statements  have  been  prepared  in  accordance  with  U.S.  generally  accepted  accounting  principles  and
include the accounts of iRhythm Technologies, Inc. and its wholly-owned subsidiary. All intercompany accounts and transactions have been eliminated. The
financial statements of the Company’s subsidiary use the U.S. dollar as the functional currency. For all non-functional currency balances, the remeasurement
of such balances to functional currency results in a foreign exchange transaction gain or loss, which is recorded in the consolidated statements of operations.

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Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions
that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the
reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates its estimates, including those related to
revenue recognition, contractual allowances for revenue, allowance for doubtful accounts, the useful lives of property and equipment, the recoverability of
long-lived  assets  including  the  estimated  usage  of  the  printed  circuit  board  assemblies  (“PCBAs”),  the  incremental  borrowing  rate  for  operating  leases,
accounting for income taxes, the fair value of the Company’s common stock and stock-based compensation. The Company bases these estimates on historical
and anticipated results, trends, and various other assumptions that the Company believes are reasonable under the circumstances, including assumptions as to
future events. Actual results may differ from those estimates.

Fair Value of Financial Instruments

The  carrying  amounts  of  certain  of  the  Company’s  financial  instruments,  which  include  cash  equivalents,  short-term  investments,  long-term

investments, accounts receivable, accounts payable and accrued liabilities, approximate fair value due to their short maturities.

Cash Equivalents

Cash equivalents consist of short-term, highly liquid investments with original maturities of three months or less from the date of purchase.

Investments

Short-term investments consist of debt securities classified as available-for-sale and have maturities greater than 90 days, but less than one year as of
the balance sheet date. Long-term investments have maturities greater than one year as of the balance sheet date. All investments are carried at fair value
based upon quoted market prices. Unrealized gains and losses on available-for-sale securities are excluded from earnings and are reported as a component of
accumulated other comprehensive loss. The cost of available-for-sale securities sold is based on the specific-identification method. Realized gains and losses
are  included  in  earnings,  and  are  derived  for  specific-identification  method  for  determining  the  costs  of  investments  sold.  Amortization  of  premiums  and
accretion of discounts are reported as a component of other income, net.

Accounts Receivable, Allowance for Doubtful Accounts and Contractual Allowance

Accounts receivable includes amounts due to the Company from healthcare institutions, third-party payors, and government payors and their related
patients,  as  a  result  of  the  Company's  normal  business  activities.  Accounts  receivable  is  reported  on  the  consolidated  balance  sheets  net  of  an  estimated
allowance for doubtful accounts and a contractual allowance.

The  Company  establishes  an  allowance  for  doubtful  accounts  for  estimated  uncollectible  receivables  based  on  its  historical  experience  and
recognizes the provision as a component of selling, general and administrative expenses. The Company records a provision for contractual allowances based
on the estimated differences between contracted amounts and expected collection rates. Such provisions are based on the Company's historical experience and
are reported as a reduction of revenue.

The following table presents the changes in the allowance for doubtful accounts (in thousands):

Balance, beginning of year

Add: provision for doubtful accounts

Less: write-offs, net of recoveries and other adjustments

Balance, end of year

Year ended December 31,

2019

2018

2017

$

$

7,296    $

4,486    $

9,129   

(7,376)  

7,353   

(4,543)  

9,049    $

7,296    $

1,792   

4,558   

(1,864)  

4,486   

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The following table presents the changes in the contractual allowance (in thousands):

Balance, beginning of year

Add: allowance for contractual adjustments

Less: contractual adjustments

Balance, end of year

Concentrations of Risk

Credit Risk

Year ended December 31,

2019

2018

2017

$

$

9,205    $

6,345    $

15,518   

(9,290)  

9,095   

(6,235)  

15,433    $

9,205    $

2,340   

4,664   

(659)  

6,345   

Financial  instruments  that  potentially  subject  the  Company  to  a  concentration  of  credit  risk  consist  primarily  of  cash  and  cash  equivalents,
investments and accounts receivable. Cash balances are deposited in financial institutions which, at times, may be in excess of federally insured limits. Cash
equivalents are invested in highly rated money market funds. The Company invests in a variety of financial instruments, such as, but not limited to, United
States Government securities, corporate notes, commercial paper and, by policy, limits the amount of credit exposure with any one financial institution or
commercial issuer. The Company has not experienced any material losses on its deposits of cash and cash equivalents or investments.

Concentrations  of  credit  risk  with  respect  to  accounts  receivable  are  limited  due  to  the  large  number  of  customers  comprising  the  Company’s
customer  base  and  their  dispersion  across  many  geographies.  The  Company  does  not  require  collateral.  The  Company  records  an  allowance  for  doubtful
accounts  when  it  becomes  probable  that  a  receivable  will  not  be  collected.  Centers  for  Medicare  and  Medicaid  Services  (“CMS”),  accounted  for
approximately 27%, 27% and 28% of the Company’s revenue for the years ended December 31, 2019, 2018 and 2017, respectively. CMS accounted for 20%
and 20% of accounts receivable as of December 31, 2019 and 2018, respectively.

Supply Risk

While the Company has not experienced manufacturing supply disruptions to date, the Company relies on single-source vendors for the supply of its
disposable housings, instruments and other materials used to manufacture the Zio monitor and the adhesive that binds the Zio monitor to a patient’s body.
These components and materials are critical, and there could be a considerable delay in finding alternative sources of supply.

Inventory

Inventory is stated at the lower of cost or net realizable value, cost being determined on a standard cost basis for material costs and on actual cost
basis for labor and overhead, which approximates actual cost on a first in, first out (“FIFO”) basis, and market being determined as the lower of cost or net
realizable value. The Company records write-downs of inventory that is obsolete or in excess of anticipated demand. The Company also records market value
based  write-downs  on  consideration  of  product  lifecycle  stage,  technology  trends,  product  development  plans  and  assumptions  about  future  demand  and
market  conditions.  Actual  demand  may  differ  from  forecasted  demand,  and  such  differences  may  have  a  material  effect  on  recorded  inventory  values.
Inventory write-downs are charged to cost of revenue and establish a new cost basis for the inventory.

Property and Equipment

Property  and  equipment  are  stated  at  cost  less  accumulated  depreciation  and  amortization.  Depreciation  and  amortization  is  computed  using  the
straight-line method over the estimated useful lives of the assets, ranging from three to five years. Leasehold improvements are amortized over the shorter of
the lease term or the estimated useful lives of the assets. Maintenance and repairs are charged to expense as incurred, and improvements and betterments are
capitalized.

Internal-Use Software

The  Company  capitalizes  costs  related  to  internal-use  software  during  the  application  development  stage.  Costs  related  to  planning  and  post
implementation activities are expensed as incurred. Capitalized internal-use software is amortized, and recognized as cost of revenue, on a straight-line basis
over the estimated useful life, which is up to five years. The Company evaluates the useful lives of these assets on an annual basis, and tests for impairment
whenever events or changes in

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circumstances occur that could impact the recoverability of these assets. Capitalized internal-use software costs are classified as a component of property and
equipment.

Goodwill

Goodwill represents the excess of the purchase price paid over the fair value of tangible and identifiable intangible net assets acquired in business
combinations. Goodwill is tested for impairment on an annual basis and at any other time if events occur or circumstances indicate that the carrying amount
of  goodwill  may  not  be  recoverable.  Such  events  or  circumstances  may  include  significant  adverse  changes  in  the  general  business  climate,  among  other
things.  The  impairment  test  is  performed  by  determining  the  enterprise  fair  value  of  the  Company,  which  is  primarily  based  on  the  Company’s  market
capitalization. If the Company’s carrying value, as a one reporting unit entity, is less than its fair value, then the fair value is allocated to all of its assets and
liabilities (including any unrecognized intangible assets) as if the fair value was the purchase price to acquire the Company. The excess of the fair value over
the amounts assigned to the Company’s assets and liabilities is the implied fair value of the goodwill. If the carrying amount of goodwill exceeds the implied
fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. The Company performs its annual evaluation of goodwill
during the fourth quarter of each fiscal year. The Company did not record any charges related to goodwill impairment in any of the periods presented in these
consolidated financial statements.

Impairment of Long-Lived Assets

The Company annually reviews long-lived assets for impairment or whenever events or changes in circumstances indicate that the carrying amount
of  an  asset  may  not  be  recoverable.  Recoverability  is  measured  by  comparison  of  the  carrying  amount  to  the  future  net  cash  flows  which  the  assets  are
expected to generate. If such assets are considered to be impaired, the impairment to be recognized is measured as the amount by which the carrying amount
of the assets exceeds the projected discounted future net cash flows arising from the asset. To date, there have been no such impairments of long-lived assets.

Other Assets

The Company uses Printed Circuit Board Assemblies (“PCBAs”), in each wearable Zio XT and Zio AT monitor as well as the wireless gateway used
in  conjunction  with  the  ZIO  AT  monitor.  The  PCBAs  are  used  numerous  times  and  have  useful  lives  beyond  one  year.  Each  time  a  PCBA  is  used  in  a
wearable Zio XT or Zio AT monitor, or a wireless gateway is used with a Zio AT monitor a portion of the cost of the PCBA and/or gateway is recorded as a
cost  of  revenue.  The  PCBAs  are  recorded  as  other  assets  and  were  $7.4  million  and  $2.5  million  as  of  December  31,  2019  and  2018,  respectively.  The
Company has based its estimates of how many times a PCBA can be used on testing in research and development, loss rates, product obsolescence, and the
amount  of  time  it  takes  the  device  to  go  through  the  manufacturing,  shipping,  customer  shelf  and  patient  wear  time  and  upload  process.  The  Company
periodically evaluates the use estimate.

Comprehensive Loss

Comprehensive loss represents all changes in stockholders’ equity during the period from non-owner sources. The Company’s unrealized gains and
losses  on  available-for-sale  securities  represent  the  only  component  of  other  comprehensive  loss  that  are  excluded  from  the  reported  net  loss  and  that  are
presented in the consolidated statements of comprehensive loss.

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Revenue Recognition

Revenue policy under ASC 606

The Company adopted Accounting Standard Codification Topic 606, Revenue from Contracts with Customers (“ASC 606”), on January 1, 2018 and
used the modified retrospective approach. Upon adoption, the Company recognized the cumulative effect of $1.4 million as an adjustment to decrease the
opening balance of the Company’s accumulated deficit. This adjustment did not have a material impact on the Company’s consolidated financial statements.
Prior periods were not retrospectively adjusted. The Company recognized revenue in prior years in accordance with Accounting Standard Codification Topic
954-605, Health Care Entities - Revenue Recognition and Accounting Standard Codification Topic 605, Revenue Recognition.

The Company’s revenue is generated primarily from the provision of its cardiac rhythm monitoring service, the Zio XT service. The Zio XT is a
cardiac rhythm monitoring service that has a patient wear period of up to 14 days and is billable when the monitoring reports are delivered to the healthcare
provider, which is also when the service is complete and the Company recognizes revenue. The time from when the patient has the Zio XT device applied to
the time the report is posted is generally around 20 days. The Company has concluded that the Zio XT service is one performance obligation on the basis that
the customer cannot benefit from each component of the service on its own or together with other resources that are readily available to the customer.

The Company recognizes as revenue the amount of consideration to which it expects to be entitled in exchange for performing the service. The
consideration  the  Company  is  entitled  to  varies  by  portfolio,  as  further  defined  below,  and  includes  estimates  that  require  significant  judgment  by
management. A unique aspect of healthcare is the involvement of multiple parties to the service transaction. In addition to the patient, often a third-party, for
example a commercial or governmental payor or healthcare institution, will pay the Company for some or all of the service on the patient’s behalf. Separate
contractual arrangements exist between the Company and third-party payors that establish amounts the third-party payor will pay on behalf of a patient for
covered services rendered.

A small part of the Company’s transactions are covered by third-party payors with whom there is no contractual agreement or not an established
amount the third-party payor will pay. In determining the collectability and transaction price for its service, the Company considers factors such as insurance
claims which are adjudicated as allowable under the applicable policy and payment history from both payors and patient out-of-pocket costs, payor coverage,
whether  there  is  a  contract  between  the  payor  or  healthcare  institution  and  the  Company,  historical  amount  received  for  the  service,  and  any  current
developments or changes that could impact reimbursement and healthcare institution payments. Certain of these factors are forms of variable consideration
which  are  only  included  in  the  transaction  price  to  the  extent  it  is  probable  that  a  significant  reversal  of  cumulative  revenue  will  not  occur  when  the
uncertainty associated with the variable consideration is subsequently resolved.

A summary of the payment arrangements with third-party payors and healthcare institutions is as follows:

•

•

•

•

Contracted  third-party  payors  –  The  Company  has  contracts  with  negotiated  prices  for  services  provided  for  patients  with  commercial
healthcare insurance carriers

CMS – The Company has received independent diagnostic testing facility approval from regional Medicare Administrative Contractors and
will  receive  reimbursement  per  the  relevant  Current  Procedural  Terminology  (“CPT”)  code  rates  for  the  services  rendered  to  the  patient
covered by CMS.

Non-contracted  third-party  payors  –  Non-contracted  commercial  and  government  payors  often  reimburse  out-of-network  rates  provided
under the relevant CPT codes on a case-by-case basis. The transaction price used for determining revenue recognition is based on factors
including  an  average  of  the  Company’s  historical  collection  experience  for  its  non-contracted  services.  This  rate  is  reviewed  at  least
quarterly.

Healthcare institutions – Healthcare institutions are typically hospitals or physician practices in which the Company has negotiated amounts
for its monitoring services, including certain governmental agencies such as the Veterans Administration and Department of Defense.

The Company is utilizing the portfolio approach practical expedient under ASC 606 for revenue recognition whereby services provided under each
of the above payor types form a separate portfolio. The Company accounts for the contracts within each portfolio as a collective group, rather than individual
contracts. Based on history with these portfolios and the similar nature and characteristics of the patients within each portfolio, the Company has concluded
that the financial statement effects are not materially different than if accounting for revenue on a contract-by-contract basis.

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For  contracted  and  CMS  portfolios,  the  Company  recognizes  revenue,  net  of  contractual  allowances,  and  recognizes  an  allowance  for  doubtful
accounts  for  uncollectible  patient  accounts  receivable.  The  transaction  price  is  determined  based  on  negotiated  rates,  and  the  Company  has  historical
experience collecting substantially all of these contracted rates. These contracts also impose a number of obligations regarding billing and other matters, and
the Company’s noncompliance with a material term of such contracts may result in a denial of the claim. The Company accounts for denied claims as a form
of  variable  consideration  that  is  included  as  a  reduction  to  the  transaction  price  recognized  as  revenue.  The  Company  estimates  the  denied  claims  which
require judgment by management. The estimated denied claims are based on historical information and judgement includes the historical period utilized. The
Company monitors the estimated denied claims against the latest available information, and subsequent changes to the estimated denied claims are recorded
as an adjustment to revenue in the periods during which such changes occur. Historical cash collection indicates that it is probable that substantially all of the
transaction price, less the estimate of denied claims, will be received. Contracted payors may require that we bill patient co-payments and deductibles and
from  time  to  time  we  may  not  be  able  to  collect  such  amounts  due  to  credit  risk.  The  Company  provides  for  estimates  of  uncollectible  patient  accounts
receivable,  based  upon  historical  experience  and  judgment  includes  the  historical  period  utilized,  at  the  time  revenue  is  recognized,  with  such  provisions
presented  as  bad  debt  expense  within  the  selling,  general  and  administrative  line  item  of  the  consolidated  statement  of  operations.  Adjustments  to  these
estimates for actual experience are also recorded as an adjustment to bad debt expense.

For non-contracted portfolios, the Company is providing an implicit price concession due to the lack of a contracted rate with the underlying payor,
the  result  of  which  requires  the  Company  to  estimate  the  transaction  price  based  on  historical  cash  collections  utilizing  the  expected  value  method.  All
subsequent adjustments to the transaction price are recorded as an adjustment to revenue.

For  healthcare  institutions,  the  transaction  price  is  determined  based  on  negotiated  rates,  and  the  Company  has  historical  experience  collecting
substantially all of these contracted rates. Historical cash collection indicates that it is probable that substantially all of the transaction price will be received.
As  such,  the  Company  is  not  providing  an  implicit  price  concession  but,  rather,  has  chosen  to  accept  the  risk  of  default,  and  any  subsequent  uncollected
amounts are recorded as bad debt expense.

Revenue policy under ASC 605

The Company’s devices, cardiac rhythm monitors, have a wear period for up to 14 days for the Zio XT service or 30 days for the Zio Event Card.
The Company’s services, consisting of the delivery of reports containing analysis of data captured by the physical device to the prescribing physician, are
generally billable at the start of the wear period or when reports are issued to physicians, depending on the service provided. For the Zio XT service, the
Company recognizes the revenue at the time that a report is delivered to a physician. For the Zio Event Card, the Company recognizes revenue on a straight-
line basis over the applicable wear period, as the event monitoring results are delivered to physicians. For all services performed, the Company considers
whether or not the following revenue recognition criteria are met: persuasive evidence of an arrangement exists and delivery has occurred or services have
been rendered. For services performed for customers which the Company invoices directly, additional revenue recognition criteria include that the price is
fixed  and  determinable  and  collectability  is  reasonably  assured;  for  customers  in  which  the  Company  submits  claims  to  third-party  commercial  and
governmental payors for reimbursement, the Company recognizes revenue only when a reasonable estimate of reimbursement can be made.The assessment of
whether  a  reasonable  estimate  of  reimbursement  can  be  made  requires  significant  judgment  by  management.  Where  management’s  judgment  indicates  a
reasonable estimate of reimbursement can be made, revenue is recognized upon delivery of the patient report for the Zio XT service and straight-line for the
Zio Event Card. Some patients have out-of-pocket costs for amounts not covered by their insurance carrier, and the Company bills the patient directly for
these  amounts  in  the  form  of  co-payments  and  co-insurance  in  accordance  with  their  insurance  carrier  and  health  plans.  Some  payors  may  not  cover  the
Company’s  service  as  ordered  by  the  prescribing  physician  under  their  reimbursement  policies.  In  the  absence  of  an  agreement  with  the  patient  or  other
clearly enforceable legal right to demand payment from the patient, the related revenue is recognized upon the earlier of notification of the payor benefits
allowed or when payment is received, until the Company has the ability to make a reasonable estimate. Once a reasonable estimate can be made, revenue is
recognized  upon  delivery  of  the  service.  During  2017,  the  Company  recognized  revenue  on  an  accrual  basis  from  certain  non-contracted  payors  as  a
reasonable estimate was able to be made, primarily based on the consistency of historical payments.

The  Company  recognizes  revenue  related  to  billings  for  CMS  and  commercial  payors  on  an  accrual  basis,  net  of  contractual  allowances,  when  a
reasonable  estimate  of  reimbursement  can  be  made.  These  contractual  allowances  represent  the  difference  between  the  list  price  (the  billing  rate)  and  the
reimbursement rate for each payor. Upon ultimate collection from CMS and commercial payors, the amount is compared to the previous estimates and the
contractual  allowance  is  adjusted  accordingly.  Until  a  contract  has  been  negotiated  with  a  commercial  payor,  the  Company’s  services  may  or  may  not  be
covered by these entities’ existing reimbursement policies. In addition, patients do not enter into direct agreements with the Company that commit them to
pay any portion of the cost of the service in the event that their insurance declines to reimburse the Company. In the absence of an agreement with the patient
or other clearly enforceable legal right to demand payment from the

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patient, the related revenue is recognized only upon the earlier of notification of the payor benefits allowed or when payment is received, until the Company
has the ability to make a reasonable estimate.

Disaggregation of Revenue

The Company disaggregates revenue from contracts with customers by payor type. The Company believes these categories aggregate the payor types
by  nature,  amount,  timing  and  uncertainty  of  its  revenue  streams.  Disaggregated  revenue  by  payor  type  and  major  service  line  for  the  years  ended
December 31, 2019 and December 31, 2018 was as follows (in thousands):

Contracted third-party payors

Non-contracted third-party payors

Centers for Medicare & Medicaid

Healthcare Institutions

Total

Contract Liabilities

Year Ended
December 31,
2019
101,845    $

10,770   

58,918   

43,019   

Year Ended
December 31,
2018

56,949   

12,447   

40,482   

37,399   

214,552    $

147,277   

$

$

ASC 606 requires an entity to present a revenue contract as a contract liability when the Company has an obligation to transfer goods or services to a
customer for which the Company has received consideration from the customer, or an amount of consideration from the customer is due and unconditional
(whichever is earlier).

Certain  of  the  Company’s  customers  pay  the  Company  directly  for  the  Zio  XT  service  upon  shipment  of  devices.  Such  advance  payments  are
contract  liabilities  and  are  recorded  as  deferred  revenue  on  the  Consolidated  Balance  Sheets  and  revenue  is  recognized  when  reports  are  delivered  to  the
healthcare provider. During the year ended December 31, 2019, $1.2 million relating to the contract liability balance at the beginning of 2019 was recognized
as revenue.

Contract Costs

Under ASC 340, the incremental costs of obtaining a contract with a customer are recognized as an asset. Incremental costs of obtaining a contract

are those costs that an entity incurs to obtain a contract with a customer that it would not have incurred if the contract had not been obtained.

The  Company’s  current  commission  programs  are  considered  incremental.  However,  as  a  practical  expedient,  ASC  340  permits  the  Company  to

immediately expense contract acquisition costs, as the asset that would have resulted from capitalizing these costs will be amortized in one year or less.

Cost of Revenue

Cost  of  revenue  includes  direct  labor,  material  costs,  equipment  and  infrastructure  expenses,  amortization  of  internal-use  software,  allocated
overhead,  and  shipping  and  handling.  Direct  labor  includes  payroll  and  personnel-related  costs  including  stock-based  compensation  involved  in
manufacturing, data analysis, and customer service. Material costs include both the disposable costs of the device and amortization of the PCBAs. Each time
the PCBA is used in a wearable Zio XT monitor, a portion of the cost of the PCBA is recorded as a cost of revenue.

Research and Development

The Company’s research and development costs are expensed as incurred. Research and development costs include, but are not limited to, payroll

and personnel-related expenses, laboratory supplies, consulting costs and overhead charges.

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Income Taxes

The Company uses the asset and liability method to account for income taxes in accordance with the authoritative guidance for income taxes. Under
this method, deferred tax assets and liabilities are determined based on future tax consequences attributable to differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax bases, and tax loss and credit carryforwards. Deferred tax assets and liabilities are
measured using enacted tax rates applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. The
effect  on  deferred  tax  assets  and  liabilities  of  a  change  in  tax  rates  is  recognized  in  income  in  the  period  that  includes  the  enactment  date.  A  valuation
allowance is established when necessary to reduce deferred tax assets to the amount expected to be realized.

The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income
tax positions are measured at the largest amount that has a greater than greater than 50% likelihood of being realized. Changes in recognition or measurement
are reflected in the period in which the change in judgment occurs. The Company records interest and penalties related to unrecognized tax benefits in income
tax expense. To date, there have been no interest or penalties charged in relation to the unrecognized tax benefits.

The Company recognize taxes on Global Intangible Low-Taxed Income as a current period expense when incurred.

Stock-based Compensation

The Company measures its stock-based awards made to employees based on the estimated fair values of the awards as of the grant date. The fair
value  of  stock  options  is  determined  using  the  Black-Scholes  option  pricing  model.  Stock-based  compensation  expense  is  recognized  over  the  requisite
service period using the straight-line method and is based on the value of the portion of stock-based payment awards that is ultimately expected to vest. As
such, the Company’s stock-based compensation is reduced for the estimated forfeitures at the date of grant and revised, if necessary, in subsequent periods if
actual forfeitures differ from those estimates. For restricted stock, the compensation cost for these awards is based on the closing price of the Company’s
common stock on the date of grant, and recognized as compensation expense on a straight-line basis over the requisite service period.

The Company recognizes compensation expense related to the Employee Stock Purchase Program (“ESPP”) based on the estimated fair value of the
options  on  the  date  of  grant,  net  of  estimated  forfeitures.  The  Company  estimates  the  grant  date  fair  value,  and  the  resulting  stock-based  compensation
expense,  using  the  Black-Scholes  option  pricing  model  for  each  purchase  period.  The  grant  date  fair  value  is  expensed  on  a  straight-line  basis  over  the
offering period.

Net Loss per Common Share

Basic  net  loss  per  common  share  is  calculated  by  dividing  the  net  loss  by  the  weighted  average  number  of  shares  of  common  stock  outstanding
during the period, without consideration of potentially dilutive securities. Diluted net loss per common share is the same as basic net loss per common share
for all periods presented, since the effect of potentially dilutive securities are anti-dilutive.

Leases

Identifying a lease

The Company determines whether a contract contains a lease at the inception of a contract. If the contract conveys the right to control the use of an
identified asset for a period of time in exchange for consideration, the Company considers the contract to contain a lease. The Company determines whether a
contract conveys the right to control the use of an identified asset for a period of time if the contract contains both of the following terms:

•

•

The right to obtain substantially all of the economic benefits from use of the identified asset; and

The right to direct the use of the identified asset.

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Discount rate for leases

On January 1, 2019, the rate implicit in the Company’s leases was not readily determinable. As such, the Company used its incremental borrowing
rate to calculate its right-of-use assets and lease liabilities upon the adoption of ASC 842. The Company determined the appropriate incremental borrowing
rate by utilizing the interest rate obtained in connection with the Third Amended and Restated Loan and Security Agreement with Silicon Valley Bank (“Third
Amended and Restated SVB Loan Agreement”) which was finalized on October 23, 2018.

On October 4, 2018, the Company entered into an office lease (“San Francisco Lease”) to rent approximately 117,560 rentable square feet in San
Francisco,  California,  which  became  the  Company’s  new  headquarters  in  October  2019.  The  San  Francisco  Lease  commenced  on  May  13,  2019  and  the
Company determined that the interest rate associated with the Third Amended and Restated SVB Loan Agreement could not be utilized as the incremental
borrowing  rate  associated  with  the  San  Francisco  Lease  due  to  the  term  of  the  lease,  as  well  as  annual  rental  payments.  The  Company  determined  the
appropriate incremental borrowing rate by using a synthetic credit rating which was estimated based on an analysis of outstanding debt of companies with
similar credit and financial profiles.

Lease term

The lease term is generally the minimum noncancellable period of each lease. The Company does not include option periods in determining the
right-of-use asset and operating lease liability at inception unless it is reasonably certain that the Company will exercise the option at inception or when a
triggering event occurs. As of December 31, 2019, no renewal options were included in the determination of lease terms.

Lease Modification

The  San  Francisco  Lease  is  in  the  same  building  with  the  same  landlord  as  the  lease  for  the  Company’s  prior  headquarters  in  San  Francisco
(“existing  lease”).  Upon  the  commencement  of  the  San  Francisco  Lease,  the  existing  lease  which  had  an  original  expiration  date  of  February  2020,  was
modified to expire in September 2019 and accordingly the right-of-use asset and lease liability was remeasured as of the modification date.

Recently Adopted Accounting Guidance

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-2, Leases (“Topic
842”), which requires lessees to recognize lease liabilities and corresponding right-of-use assets on the consolidated balance sheet for all leases. For finance
leases, the lessee would recognize interest expense and amortization of the right-of-use asset and, for operating leases, the lessee would recognize a straight-
line lease expense. As of December 31, 2019, the Company does not have any finance leases. Topic 842 also changes the definition of a lease and expands the
disclosure requirements of lease arrangements. The Company has no embedded leases with suppliers. Upon adoption of Topic 842 on January 1, 2019 using
the  modified  retrospective  method,  the  Company  recognized  right-of-use  assets  of  $10.2  million  and  lease  liabilities  of  $10.0  million.  There  was  no
cumulative-effect adjustment recorded on January 1, 2019. The Company adopted the following practical expedients allowed under Topic 842:

•

•

•

The  package  of  three  practical  expedients,  which  allows  entities  to  make  an  election  that  allows  them  not  to  reassess  (1)  whether
existing or expired contracts contain embedded leases under Topic 842, (2) lease classification of existing or expiring leases, and (3)
indirect costs for existing or expired leases;

Combining  lease  and  non-lease  components  practical  expedient,  which  allows  lessees,  as  an  accounting  policy  election  by  class  of
underlying asset, to choose not to separate non-lease components from lease components and instead to account for each separate lease
component and the non-lease components associated with that lease component as a single lease component; and

Comparative  reporting  practical  expedient,  which  allows  entities  to  initially  apply  Topic  842  at  the  adoption  date  and  recognize  a
cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption.

For further details, refer to Note 6. Commitments and Contingencies.

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Recent Accounting Standards or Updates Not Yet Effective

In  June  2016,  the  FASB  issued  ASU  No.  2016-13,  Financial  Instruments-Credit  Losses  (Topic  326):  Measurement  of  Credit  Losses  on  Financial
Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost, including trade receivables.
ASU No. 2016-13 replaces the existing incurred loss impairment model with an expected loss model that requires the use of forward-looking information to
calculate credit loss estimates. It also eliminates the concept of other-than-temporary impairment and requires credit losses related to available-for-sale debt
securities to be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. The Company will
adopt this standard in the first quarter of fiscal 2020 and is evaluating the impact of adopting this amendment to its consolidated financial statements.

In  August  2018,  the  FASB  issued  ASU  No.  2018-15,  Intangibles-Goodwill  and  Other-Internal-Use  Software  (Subtopic  350-40):  Customer’s
Accounting  for  Implementation  Costs  Incurred  in  a  Cloud  Computing  Arrangement  that  is  a  Service  Contract,  which  amended  its  guidance  for  costs  of
implementing a cloud computing service arrangement to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is
a  service  contract  with  the  requirements  for  capitalizing  implementation  costs  incurred  to  develop  or  obtain  internal-use  software.  This  new  standard  also
requires  customers  to  expense  the  capitalized  implementation  costs  of  a  hosting  arrangement  that  is  a  service  contract  over  the  term  of  the  hosting
arrangement. This new standard becomes effective for the Company in the first quarter of fiscal year 2020, with early adoption permitted. This new standard
can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is evaluating the impact of
adopting this amendment to its consolidated financial statements.

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies
the accounting for income taxes by removing certain exceptions to the general principles for income taxes. ASU 2019-12 will be effective for us beginning
January 1, 2021, and early adoption is permitted. The Company is currently evaluating the impact of adoption on our consolidated financial statements.

3. Cash Equivalents and Investments

The fair value of cash equivalents and available-for-sale investments at December 31, 2019 and 2018, were as follows (in thousands):

Money market funds

U.S. government securities

Corporate notes

Commercial paper

Total available-for-sale marketable debt securities

Classified as:

Cash equivalents

Short-term investments

Long-term investments

Total cash equivalents and available-for-sale investments

Amortized
Cost

December 31, 2019

Gross Unrealized

Gains

Losses

13,897    $

—    $

—    $

77,329   

14,955   

35,753   

72   

11   

—   

(1)  

—   

—   

Estimated
Fair Value

13,897   

77,400   

14,966   

35,753   

141,934    $

83    $

(1)   $

142,016   

$

$

$

$

13,897   

120,089   

8,030   

142,016   

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Money market funds

U.S. government securities

Corporate notes

Commercial paper

Total available-for-sale marketable debt securities

Classified as:

Cash equivalents

Short-term investments

Total cash equivalents and available-for-sale investments

Amortized
Cost

December 31, 2018

Gross Unrealized

Gains

Losses

Estimated
Fair Value

$

$

10,606    $

—    $

—    $

9,976   

16,514   

36,331   

—   

3   

—   

(1)  

(18)  

—   

73,427    $

3    $

(19)   $

$

$

10,606   

9,975   

16,499   

36,331   

73,411   

15,091   

58,320   

73,411   

The  following  table  summarizes  the  fair  value  of  the  Company's  cash  equivalents,  short-term  and  long-term  marketable  securities  classified  by

maturity (in thousands):

Due within one year

Due after one year through three years

Total cash equivalents and available-for-sale investments

December 31,

2019

2018

$

$

133,986    $

8,030   

142,016    $

73,411   

—   

73,411   

The  following  tables  present  the  Company's  available-for-sale  securities  that  were  in  an  unrealized  loss  position  as  of    December  31,  2018  (in

thousands):

Less than 12 months

December 31, 2018

12 Months or Greater

Total

Assets

U.S. government securities

Corporate notes

Total

Fair Value

Unrealized Loss

Fair Value

Unrealized Loss

Fair Value

Unrealized Loss

$

$

5,977    $

11,521   

17,498    $

(1)   $

(10)  

(11)   $

—    $

2,993   

2,993    $

—    $

(8)  

(8)   $

5,977    $

14,514   

20,491    $

(1)  

(18)  

(19)  

Unrealized losses as of December 31, 2019 were not material. Available-for-sale securities held as of December 31, 2019 had a weighted average

maturity of 126 days. At December 31, 2019, one investment was in an unrealized loss position and no investments have been in an unrealized loss position
for more than one year.

4. Fair Value Measurements

The Company discloses and recognizes the fair value of its assets and liabilities using a hierarchy that prioritizes the inputs to valuation techniques
used to measure fair value. Fair value is defined 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 reporting date. The hierarchy gives the highest priority to valuations based upon unadjusted quoted prices in
active  markets  for  identical  assets  or  liabilities  (Level  1  measurements)  and  the  lowest  priority  to  valuations  based  upon  unobservable  inputs  that  are
significant to the valuation (Level 3 measurements). The guidance establishes three levels of the fair value hierarchy as follows:

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date.

Level  2—Inputs  (other  than  quoted  market  prices  included  in  Level  1)  are  either  directly  or  indirectly  observable  for  the  asset  or  liability  through
correlation with market data at the measurement date and for the duration of the instrument’s anticipated life.

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Level 3—Inputs  reflect  management’s  best  estimate  of  what  market  participants  would  use  in  pricing  the  asset  or  liability  at  the  measurement  date.
Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model.

Assets  and  liabilities  measured  at  fair  value  are  classified  in  their  entirety  based  on  the  lowest  level  of  input  that  is  significant  to  the  fair  value
measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires management to make
judgments and consider factors specific to the asset or liability. The corporate notes, commercial paper and government securities are classified as Level 2 as
they were valued based upon quoted market prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that
are not active and model-based valuation techniques for which all significant inputs are observable in the market or can be corroborated by observable market
data for substantially the full term of the assets.

The fair value of the Company’s outstanding interest-bearing obligations is estimated using the net present value of the future payments, discounted
at an interest rate that is consistent with market interest rates, which is a Level 2 input. The carrying amount and the estimated fair value of the Company’s
outstanding interest-bearing obligations at December 31, 2019 were $34.9 million and $35.2 million, respectively. The carrying amount and the estimated fair
value of the Company’s outstanding interest-bearing obligations at December 31, 2018 were $34.9 million and $34.9 million, respectively.  

The Company had no transfers between levels of the fair value hierarchy of its assets measured at fair value.

The following tables present the fair value of the Company’s financial assets determined using the inputs defined above (in thousands).

Assets

Money market funds

U.S. government securities

Corporate notes

Commercial paper

Total

Assets

Money market funds

U.S. government securities

Corporate notes

Commercial paper

Total

5. Balance Sheet Components

Inventory and Other Assets

Inventory consisted of the following (in thousands):

Raw materials

Finished goods

Total

Level 1

Level 2

Level 3

Total

December 31, 2019

13,897    $

—    $

—    $

—   

—   

—   

77,400   

14,966   

35,753   

—   

—   

—   

13,897   

77,400   

14,966   

35,753   

13,897    $

128,119    $

—    $

142,016   

Level 1

Level 2

Level 3

Total

December 31, 2018

10,606    $

—    $

—    $

—   

—   

—   

9,975   

16,499   

36,331   

—   

—   

—   

10,606    $

62,805    $

—    $

10,606   

9,975   

16,499   

36,331   

73,411   

December 31,

2019

2018

$

$

1,574    $

2,463   

4,037    $

676   

1,386   

2,062   

$

$

$

$

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The Company uses Printed Circuit Board Assemblies (“PCBAs”), in each wearable Zio XT and Zio AT monitor as well as the wireless gateway used
in conjunction with the Zio AT monitor. The PCBAs are used numerous times and have useful lives beyond one year. Each time a PCBA is used in a wearable
Zio XT or Zio AT monitor, or a wireless gateway is used with a Zio AT monitor a portion of the cost of the PCBA and/or gateway is recorded as a cost of
revenue. The PCBAs are recorded as other assets and were $7.4 million and $2.5 million as of December 31, 2019, and December 31, 2018, respectively. The
amortization was $3.6 million, $3.1 million and $2.1 million for the years ending December 31, 2019, 2018, and 2017, respectively.

Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

Laboratory and manufacturing equipment

Computer equipment and software

Furniture and fixtures

Leasehold improvements

Internal-use software

Total property and equipment, gross

Less: accumulated depreciation and amortization

Total property and equipment, net

December 31,

2019

2018

$

4,238    $

2,315   

3,669   

7,597   

16,277   

34,096   

(7,632)  

$

26,464    $

2,750   

1,062   

925   

726   

8,925   

14,388   

(5,230)  

9,158   

Depreciation and amortization expense for the years ended December 31, 2019, 2018 and 2017 was $3.4 million, $2.3 million, and $1.6 million,

respectively.

Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

Accrued vacation

Accrued payroll and related expenses

Accrued ESPP Contributions

Accrued professional services fees

Claims payable

Other

Total accrued liabilities

6. Commitments and Contingencies

Lease Arrangements

December 31,

2019

2018

$

3,809    $

19,156   

417   

2,846   

2,802   

3,556   

2,825   

18,188   

373   

1,249   

2,374   

1,679   

$

32,586    $

26,688   

The Company leases office, manufacturing, and clinical centers under non-cancelable operating leases which expire on various dates through 2031.
These leases generally contain scheduled rent increases or escalation clauses and renewal options. Operating lease right-of-use assets and lease liabilities are
recognized based on the present value of the future minimum lease payments over the lease term at commencement date. The operating lease right-of-use
assets  also  include  any  lease  payments  made  to  the  lessor  at  or  before  the  commencement  date  as  well  as  variable  lease  payments  which  are  based  on  a
consumer  price  index.  The  Company  is  also  subject  to  variable  lease  payments  related  to  janitorial  services  and  electricity  which  are  not  included  in  the
operating lease right-of-use asset as they are based on actual usage. The Company recognizes operating lease expense on a straight-line basis over the lease
period. The total operating lease cost recognized during the year ended December 31, 2019 was $11.3 million which primarily consisted of lease payments
and common area maintenance costs. Cash paid for operating leases during the year ended December 31, 2019 was $7.9 million.

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On October 4, 2018, the Company entered into an office lease (“San Francisco Lease”) to rent approximately 117,560 rentable square feet in San

Francisco, California, which became the Company’s new headquarters in October 2019.

The term of the San Francisco lease began on May 13, 2019, and expires on August 31, 2031. The Company is entitled to one option to extend the
San  Francisco  Lease  for  a  five-year  term,  subject  to  certain  requirements.  In  addition,  the  landlord  will  provide  a  tenant  improvement  allowance  of  up  to
$2.4 million for leasehold improvements in connection with the cost of construction of the initial alterations within the premises.

The Company has obtained a standby letter of credit in the amount of $6.9 million, which may be drawn down by the landlord to be applied upon

the Company’s breach of any provisions under the San Francisco Lease.

As of December 31, 2019, maturities of operating lease liabilities were as follows (in thousands):

Year Ended December 31:
2020

2021

2022

2023

2024

Thereafter

Less: imputed interest

Total lease liabilities

$

$

9,253   

11,550   

11,330   

11,667   

12,015   

87,793   

143,608   

(49,946)  

93,662   

Minimum future lease payments as of December 31, 2018 and under the previous lease accounting standard, which includes annual rental payments

for the San Francisco Lease which commenced May 13, 2019, for the year ended December 31, 2018 are as follows (in thousands):

Year Ended December 31:
2019

2020

2021

2022

2023

Thereafter

Total

$

8,135   

10,669   

10,828   

11,150   

11,483   

98,209   

$

150,474   

The  weighted  average  remaining  lease  term  of  the  Company's  operating  leases  as  of  December  31  2019  was  11.6  years.  The  weighted  average

discount rate of the Company's operating leases was 7.36% as of December 31, 2019.

Legal Proceedings

From  time  to  time,  the  Company  may  become  involved  in  legal  proceedings  arising  from  the  ordinary  course  of  its  business.  Management  is

currently not aware of any matters that could have a material adverse effect on the financial position, results of operations or cash flows of the Company.

Collaboration Agreement

On  September  3,  2019,  the  Company  entered  into  a  Development  Collaboration  Agreement  (the  “Development  Agreement”)  with  Verily  Life
Sciences LLC ("Verily"). The Development Agreement, which is over a 24 month term, involves joint development and production of intellectual property
between  the  Company  and  Verily.  Each  participant  has  primary  responsibility  for  certain  aspects  of  development  and  approval,  with  all  processes  to  be
performed at each respective party’s own cost. Costs incurred by the Company in connection with the Development Agreement will be expensed as research
and development expense in accordance with ASC 730, Research and Development.

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The Company and Verily will develop certain next-generation atrial fibrillation (“AF”) screening, detection, or monitoring products pursuant to the
Development Collaboration Agreement, which products will involve combining Verily’s technology with the Company’s technology to create an end to end
system. Under the terms of the Development Agreement, the Company paid Verily an upfront fee of $5.0 million. In addition, the Company has agreed to
make additional payments to Verily up to an aggregate of $12.75 million in milestone payments upon achievement of various development and regulatory
milestones over the 24 months of the Development Agreement, which payments will be made in cash to Verily. During the year ended December 31, 2019 the
company achieved a milestone resulting in additional expense of $1.0 million which is included in accounts payable as of December 31, 2019.

The Development Agreement provides each party with licenses to use certain intellectual property of the other party for development activities in
the field of AF screening, detection, or monitoring. Ownership of developed intellectual property will be allocated to the Company or Verily depending on the
subject matter of the underlying developed intellectual property, and, for certain subject matter, shall be jointly owned.

During the year ended December 31, 2019, the Company recognized $6.0 million of research and development expense related to the Agreement.

Indemnifications

In  the  ordinary  course  of  business,  the  Company  enters  into  agreements  pursuant  to  which  it  agrees  to  indemnify  customers,  vendors,  lessors,
business partners, and other parties with respect to certain matters, including losses arising out of the breach of such agreements, services to be provided by
us, or from intellectual property infringement claims made by third parties. Pursuant to such agreements, the Company may indemnify, hold harmless and
defend an indemnified party for losses suffered or incurred by the indemnified party. Some of the provisions will limit losses to those arising from third-party
actions.  In  some  cases,  the  indemnification  will  continue  after  the  termination  of  the  agreement.  The  maximum  potential  amount  of  future  payments  the
Company  could  be  required  to  make  under  these  provisions  is  not  determinable.  The  Company  has  also  entered  into  indemnification  agreements  with  its
directors and officers that may require the Company to indemnify its directors and officers against liabilities that may arise by reason of their status or service
as  directors  or  officers  to  the  fullest  extent  permitted  by  applicable  law.  The  Company  currently  has  directors’  and  officers’  insurance.  The  Company  has
never incurred material costs to defend lawsuits or settle claims related to these indemnification provisions, and believes that the estimated fair value of these
indemnification obligations is not material and it has not accrued any amounts for these obligations.

7. Debt

Pharmakon Loan Agreement

In December 2015, the Company entered into a Loan Agreement with Biopharma Secured Investments III Holdings Cayman LP (the “Pharmakon
Loan  Agreement”).  The  Pharmakon  Loan  Agreement  provides  for  up  to  $55.0  million  in  term  loans  split  into  two  tranches  as  follows:  (i)  the  Tranche  A
Loans are $30.0 million in term loans, and (ii) the Tranche B Loans are up to $25.0 million in term loans. The Tranche A Loans were drawn on December 4,
2015. The Tranche B Loans were available to be drawn prior to December 4, 2016. No additional draw was taken.

The  Tranche  A  Loans  bear  interest  at  a  fixed  rate  equal  to  9.50%  per  annum  that  is  due  and  payable  quarterly  in  arrears.  During  the  first  eight

calendar quarters, 50% of the interest due and payable was added to the then outstanding principal.

In December 2015, the Company used the proceeds from the Pharmakon Loan Agreement to repay $4.9 million of bank debt to Silicon Valley Bank

("SVB"). The issuance costs and debt discount have been netted against the borrowed funds on the balance sheet.

On October 23, 2018, the Company repaid the principal amount of the Tranche A Loan of $30.0 million and related accrued interest of $3.3 million,
using proceeds from the Third Amended and Restated SVB Loan Agreement noted below. The Company incurred a $3.0 million loss in connection with the
early extinguishment of the Pharmakon Loan Agreement which included a prepayment premium fee of $1.0 million and additional consideration related to
the prepayment of $1.5 million.

Bank Debt

In  December  2015,  the  Company  entered  into  a  Second  Amended  and  Restated  Loan  and  Security  Agreement  with  SVB,  (the  “SVB  Loan
Agreement”).  Under  the  SVB  Loan  Agreement,  the  Company  may  borrow,  repay  and  reborrow  under  a  revolving  credit  line,  but  not  in  excess  of  the
maximum loan amount of $15.0 million, until December 4, 2018, when all outstanding principal and accrued interest becomes due and payable. Any principal
amount outstanding under the SVB Loan

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Agreement  shall  bear  interest  at  a  floating  rate  per  annum  equal  to  the  rate  published  by  The  Wall  Street  Journal  as  the  “Prime  Rate”  plus  0.25%.  The
Company may borrow up to 80% of its eligible accounts receivable, up to the maximum of $15.0 million.

In August 2016, the Company obtained a $3.1 million standby letter of credit pursuant to the SVB Loan Agreement in connection with a lease for its

San Francisco office.

In  October  2018,  the  Company  entered  into  the  Third  Amended  and  Restated  Loan  and  Security  Agreement  with  SVB  (“Third  Amended  and

Restated SVB Loan Agreement”).

Pursuant to the Third Amended and Restated SVB Loan Agreement, the Company obtained a term loan (“SVB Term Loan”) for $35.0 million. Total
proceeds from the SVB Term Loan were used to pay off the loan agreement with Biopharma Secured Investments III Holdings Cayman LP (“Pharmakon”),
totaling $35.8 million. The Company will make interest-only payments through October 31, 2020, followed by 36 monthly payments of principal plus interest
on the SVB Term Loan. Interest charged on the SVB Term Loan will be the greater of (a) a floating rate based on the “Prime Rate” published by The Wall
Street  Journal  minus  0.75%,  or  (b)  4.25%.  The  weighted  average  interest  rate  was  4.58%  and  4.50%  for  the  years  ended  December  31,  2019  and  2018,
respectively.

Under the Third Amended and Restated SVB Loan Agreement, the Company may borrow, repay, and reborrow under a revolving credit line, but not
in excess of the maximum loan amount of $25.0 million, which includes an $11.0 million standby letter of credit sublimit availability. In October 2018, a $6.9
million standby letter of credit was obtained in connection with a lease for the Company’s San Francisco headquarters. Any principal amount outstanding
under the Third Amended and Restated SVB Loan Agreement revolving credit line shall bear interest at an amount that is the greater of (a) a floating rate per
annum equal to the rate published by The Wall Street Journal as the “Prime Rate” or (b) 5.00%. The Company may borrow up to 75% of eligible accounts
receivable,  up  to  the  maximum  of  $25.0  million.  As  of  December  31,  2019,  the  Company  was  eligible  to  borrow  up  to  $5.6  million  and  no  amount  was
outstanding under the revolving credit line.

The Third Amended and Restated Loan Agreement requires the Company to maintain a minimum consolidated liquidity ratio or minimum adjusted
Earnings Before Interest, Tax, Depreciation, and Amortization during the term of the loan facility. In addition, the SVB Loan Agreement contains customary
affirmative and negative covenants and events of default. The SVB Loan Agreement also includes financial covenants requiring the Company to maintain a
minimum liquidity ratio and asset based threshold. The Company was in compliance with financial loan covenants as of December 31, 2019. The obligations
under the Third Amended and Restated Loan Agreement are collateralized by substantially all assets of the Company.

California HealthCare Foundation Note

In  November  2012,  the  Company  entered  into  a  Note  Purchase  Agreement  and  Promissory  Note  with  the  California  HealthCare  Foundation  (the
“CHCF Note”), through which the Company borrowed $1.5 million. The CHCF Note accrued simple interest of 2.0%. The accrued interest and the principal
was to mature in November 2016. In partial consideration for the issuance of the CHCF Note, the Company issued warrants to purchase 22,807 shares of the
Company’s Series D convertible preferred stock.

In June 2015, the Company amended the CHCF Note to extend the maturity date to May 2018. The CHCF Note was subordinate to other debt. In

May 2018, the Company repaid the principal amount of $1.5 million and related $0.2 million in accrued interest on the CHCF Note.

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Future minimum payments

Future minimum payments under the Third Amended and Restated Loan and Security Agreement with Silicon Valley Bank at December 31, 2019

are as follows (in thousands):

Year Ending December 31,
2020

2021

2022

2023

Total

Less: Amount representing interest

Less: Debt Issuance Costs

Total Carrying Value

Reported as:

Short-term debt

Long-term debt

Total

8. Income Taxes

$

$

$

$

3,449   

12,860   

12,358   

9,914   

38,581   

(3,581)  

(67)  

34,933   

1,944   

32,989   

34,933   

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (Tax Act).
The Tax Act reduced the U.S. statutory corporate tax rate to 21%, effective January 1, 2018. Consequently, we recorded a decrease to our federal deferred tax
assets of $22.0 million, which was fully offset by a reduction in our valuation allowance for the year ended December 31, 2017.

The following table presents components of the Company’s provision for income taxes as for the period presented (in thousands):

Current expense (benefit):

Federal

State

Foreign

Total current tax expense (benefit)

Deferred expense (benefit):

Federal

State

Foreign

Total deferred tax expense (benefit)

2019

December 31,

2018

2017

$

—    $

—    $

—   

68   

68   

—   

—   

(3)  

(3)  

—   

80   

80   

—   

—   

(36)  

(36)  

Total Tax Expense (benefit)

$

65    $

44    $

97

—   

—   

—   

—   

—   

—   

—   

—   

—   

Table of Contents

The following table presents a reconciliation of the tax expense computed at the statutory federal rate and the Company’s tax expense for the period

presented (in thousands):

Tax at statutory federal rate

Stock-based compensation

Meals and Entertainment

Other

Tax credits

2017 Tax Act

Change in valuation allowance

Provision for income taxes

December 31,

2019
(11,446)   $

2018
(10,570)   $

(5,560)  

(8,557)  

2017
(10,143)  

(7,634)  

409   

614   

(1,128)  

—   

17,176   

309   

148   

(1,015)  

44   

19,685   

65    $

44    $

198   

(145)  

(644)  

21,969   

(3,601)  

—   

$

$

Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting

purposes and the amounts used for income tax purposes.

Significant components of the Company’s deferred tax assets and liabilities are as follows (in thousands):

Deferred tax assets:

Net operating loss carryforwards

Tax credit carryforwards

Share-based compensation

Allowances and other

Lease obligation

Total deferred tax assets

Valuation allowance

Net deferred tax assets

Deferred Tax Liabilities:

Depreciation and Amortization

Right of use asset

Total deferred tax liability

Total deferred tax assets

December 31,

2019

2018

$

64,648    $

50,601   

5,601   

5,932   

11,443   

23,869   

111,493   

(88,433)  

23,060   

(850)  

(22,171)  

(23,021)  

$

39    $

4,287   

3,149   

8,827   

—   

66,864   

(66,435)  

429   

(388)  

—   

(388)  

41   

Due to the uncertainties surrounding the realization of deferred tax assets through future taxable income, the Company has provided a full valuation
allowance against its U.S. deferred tax assets, and, therefore, no benefit has been recognized for the net operating loss carryforwards and other deferred tax
assets.  The  U.S.  valuation  allowance  increased  by  $22.0  million  and  $22.1  million  for  the  years  ended  December  31,  2019  and  December  31,  2018,
respectively. The current year change in the U.S. valuation allowance is primarily related to the increase in net operating loss carryforwards generated during
the year. The Company recorded an immaterial deferred tax asset related to the Company’s foreign operations in the United Kingdom.

The  valuation  allowance  for  deferred  tax  assets  consisted  of  the  following  activity  for  the  years  ended  December  31,  2019,  2018  and  2017  (in

thousands):

Year Ended December 31, 2017

Year Ended December 31, 2018

Year Ended December 31, 2019

Balance at beginning
of year

Additions

Deductions

$

$

44,861    $

44,321   

—    $

22,114   

66,435    $

21,998    $

Balance at end of year
44,321   

540    $

—   

—    $

66,435   

88,433   

As of December 31, 2019, the Company had approximately $259.9 million of federal and $153.8 million of state net operating loss carryforwards

available to offset future taxable income which expires in varying amounts beginning in 2027 and

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Table of Contents

2019 respectively. The Tax Act changed the federal rules governing net operating loss carryforwards. For net operating loss carryforwards arising in tax years
beginning after December 31, 2017, the Tax Act limits a taxpayer’s ability to utilize such carryforwards to 80% of taxable income. In addition, net operating
loss  carryforwards  arising  in  tax  years  ending  after  December  31,  2017  can  be  carried  forward  indefinitely,  but  carryback  is  generally  prohibited.  Net
operating  loss  carryforwards  generated  before  January  1,  2018  will  not  be  subject  to  the  Tax  Act’s  taxable  income  limitation  and  will  continue  to  have  a
twenty-year carryforward period.

As  of  December  31,  2019,  the  Company  had  tax  credit  carryforwards  of  approximately  $5.1  million,  and  $2.7  million  available  to  reduce  future
taxable income, if any, for both federal and state purposes, respectively. The federal tax credit carryforwards expire beginning in 2028 and the state tax credits
can be carried forward indefinitely.

Section 382 of the Internal Revenue Code, and similar state provisions, limits the use of net operating loss and tax credit carryforwards in certain
situations  where  equity  transactions  result  in  a  change  of  ownership  as  defined  by  Internal  Revenue  Code  Section  382.  In  the  event  the  Company  should
experience an ownership change, as defined, utilization of its net operating loss carryforwards and tax credits could be limited.

A reconciliation of the Company’s unrecognized tax benefit amount is as follows (in thousands):

Balance at beginning of year

Additions for tax positions taken in current year

Increases in balance related to prior year tax positions

Decreases in balances related to prior year tax position

Balance at end of year

Year Ended December 31,

2019

2018

2017

1,459    $

943    $

383   

—   

—   

441   

75   

—   

1,842    $

1,459    $

616   

328   

—   

(1)  

943   

$

$

The  total  amount  of  gross  unrecognized  tax  benefits  was  $1.8  million,  $1.5  million,  and  $0.9  million  as  of  December  31,  2019,  2018,  and  2017
respectively. None of the Company’s unrecognized tax benefits that, if recognized, would affect its effective tax rate. The Company does not anticipate the
total  amounts  of  unrecognized  tax  benefits  will  significantly  increase  or  decrease  in  the  next  12  months.  The  Company’s  policy  is  to  include  interest  and
penalties related to unrecognized tax benefits within the provision for taxes. Management determined that no accrual for interest or penalties was required as
of December 31, 2019, 2018 and 2017.

The Company files income tax returns in the U.S. and UK jurisdictions. All of the Company's tax years are open to examination by the US federal,
state  and  foreign  tax  authorities.  The  Company  currently  has  no  federal,  state  or  foreign  tax  examinations  in  progress,  nor  has  it  had  any  federal  or  state
examinations since inception.

9. Stockholders’ Equity

Common stock

The Company’s amended and restated certificate of incorporation dated October 25, 2016, authorizes the Company to issue 100,000,000 shares of
common stock with a par value of $0.001 per share and 5,000,000 shares of preferred stock with a par value of $0.001 per share. The holders of common
stock are entitled to receive dividends whenever funds and assets are legally available and when declared by the board of directors, subject to the prior rights
of holders of all series of convertible preferred stock outstanding. No dividends were declared through December 31, 2019.

The Company had reserved shares of common stock for issuance as follows:

Options issued and outstanding

Unvested restricted stock units

Common stock warrants issued and outstanding

Shares available for grant under future stock plans

Shares available for future issuance

99

December 31,

2019
1,503,247   

886,030   

—   

6,709,235   

9,098,512   

2018
2,094,137   

547,891   

4,857   

5,607,014   

8,253,899   

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10. Stock Incentive Plans

2006 Plan

In October 2006, the Company adopted the 2006 Equity Incentive Plan, as amended, (the “2006 Plan”). The Plan provided for the granting of stock
options to employees and non-employees of the Company. Options granted under the Plan were either incentive stock options or nonqualified stock options.
Incentive  stock  options  (“ISO”)  were  granted  only  to  employees  (including  officers  and  directors  who  are  also  employees).  Nonqualified  stock  options
(“NSO”)  may  be  granted  to  employees  and  non-employees.  The  board  of  directors  had  the  authority  to  determine  to  whom  options  will  be  granted,  the
number of options, the term and the exercise price.

Options under the Plan were granted for periods of up to ten years and at the fair value of the shares on the date of grant as determined by the board
of directors. In general, options become exercisable at a rate of 25% after the first anniversary of the grant and then monthly vesting for an additional three
years from date of grant. The term for options is no longer than five years for ISOs for which the grantee owns greater than 10% of the voting power of all
classes of stock and no longer than ten years for all other options. The Company issues new shares upon the exercise of options.

2016 Plan

In  October  2016,  the  Company  adopted  the  2016  Equity  Incentive  Plan,  (the  “2016  Plan”).  The  2016  Plan  was  subsequently  approved  by  the
Company’s stockholders and became effective on October 19, 2016, immediately before the effective date of the IPO. Following the effectiveness of the 2016
Plan, no additional options will be granted under the 2006 Plan. In addition, to the extent that any awards outstanding or subject to vesting restrictions under
the 2006 Plan are subsequently forfeited or terminated for any reason before being exercised or settled, the shares of common stock reserved for issuance
pursuant to such awards as of the closing of the IPO will become available for issuance under the 2016 Plan. The remaining shares available for grant under
the 2006 Plan became available for issuance under the 2016 Plan upon the closing of the IPO. On the first day of each year, the 2016 Plan authorizes an
annual increase of the least of 3,865,000 shares, 5% of outstanding shares on the last day of the immediately preceding fiscal year or an amount as determined
by the Company's Board of Directors. As of December 31, 2019, the Company has reserved 7,359,234 shares of common stock for issuance under the 2016
Plan.

Pursuant to the 2016 Plan, stock options, restricted shares, stock units, including restricted stock units and stock appreciation rights may be granted

to employees, consultants, and outside directors of the Company. Options granted may be either ISOs or NSOs.

Stock options are governed by stock option agreements between the Company and recipients of stock options. ISOs and NSOs may be granted under
the 2016 Plan at an exercise price of not less than 100% of the fair market value of the common stock on the date of grant, determined by the Compensation
Committee of the Board of Directors. Options become exercisable and expire as determined by the Compensation Committee, provided that the term of ISOs
may not exceed ten years from the date of grant.

Employee Stock Purchase Program (“ESPP”)

In October 2016, the Company’s Board of Directors and stockholders approved the Employee Stock Purchase Plan (the “ESPP”). Under the ESPP,
the Company initially reserved 483,031 shares of common stock for issuance as of its effective date of October 19, 2019 On the first day of each calendar
year, the number of shares reserved increases by the least of 966,062 shares, 1.5% of the shares of the Company’s common stock outstanding on the last day
of the immediately preceding fiscal year, or an amount as determined by the Company’s Board of Directors. The ESPP allows eligible employees to purchase
shares of the Company’s common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations.
The ESPP provides for 12 month offering periods that each contain two 6 month purchase periods. At the end of each purchase period, employees are able to
purchase shares at 85% of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the last day
of the purchase period.

As of December 31, 2019, 350,198 shares of common stock have been issued to employees participating in the ESPP and 1,181,103 shares were

available for issuance under the ESPP.

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Table of Contents

The Company used the following assumptions to estimate the fair value of the ESPP offered for the year ended December 31, 2019: expected term of

0.5 – 1 year, volatility of 43.61% - 48.05%, risk-free interest rate of 1.60% - 2.35% and expected dividend yield of zero.

The Company used the following assumptions to estimate the fair value of the ESPP offered for the year ended December 31, 2018: expected term of

0.5 – 1 year, volatility of 41.46% - 44.55%, risk-free interest rate of 2.19% - 2.64% and expected dividend yield of zero.

The Company used the following assumptions to estimate the fair value of the ESPP offered for the year ended December 31, 2017: expected term of

0.5 – 1 year, volatility of 42.18% - 57.69%, risk-free interest rate of 0.52% - 1.62% and expected dividend yield of zero.

Equity Incentive Plan Activity

A summary of share-based awards available for grant under the 2016 Equity Incentive Plan is as follows: 

Balance at December 31, 2016

Additional options authorized

Awards granted

Awards forfeited

Balance at December 31, 2017

Additional awards authorized

Awards granted

Awards forfeited

Awards withheld for tax purposes

Balance at December 31, 2018

Additional awards authorized

Awards granted

Awards forfeited

Awards withheld for tax purposes

Balance at December 31, 2019

Shares Available
for Grant

3,743,037   

1,106,966   

(837,436)  

21,585   

4,034,152   

1,168,865   

(666,913)  

124,478   

56,710   

4,717,292   

1,218,402   

(649,911)  

181,513   

60,836   

5,528,132   

During the year ended December 31, 2019, 629,901 restricted stock units ("RSUs") were granted, 180,842 RSUs vested, and 110,920 RSUs were

forfeited.

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The following table summarizes stock option activity under the 2006 and 2016 Plans, including grants to nonemployees:

Balance at December 31, 2016

Options granted

Options exercised

Options forfeited

Balance at December 31, 2017

Options granted

Options exercised

Options forfeited

Balance at December 31, 2018

Options granted

Options exercised

Options forfeited

Balance at December 31, 2019

Options exercisable – December 31, 2019

Options vested and expected to vest – December 31, 2019

Weighted-
Average
Exercise
Price Per
Share

Options Outstanding
Weighted-
Average
Remaining
Contractual
Life (years)

Aggregate
Intrinsic
Value
(in thousands)

6.16   

36.76   

4.11   

14.43   

12.24   

68.32   

7.19   

34.30   

23.20   

82.77   

9.59   

54.54   

27.40   

19.64   

27.07   

6.93 $

70,979   

7.17 $

113,958   

7.02

97,976   

6.43

6.02

6.41

62,401   

55,919   

62,220   

Options
Outstanding

2,977,218    $

465,271    $

(827,556)   $

(13,752)   $

2,601,181    $

366,928    $

(798,424)   $

(75,548)   $

2,094,137    $

20,010    $

(540,307)   $

(70,593)   $

1,503,247    $

1,147,525    $

1,487,867    $

The aggregate intrinsic values of options outstanding, exercisable, vested and expected to vest were calculated as the difference between the exercise

price of the options and the closing price of the Company’s common stock.

During the years ended December 31, 2019, 2018 and 2017, the Company granted options with a weighted-average grant date fair value of $38.29,

$32.38 and $18.69 per share, respectively.

The aggregate intrinsic value of options exercised was $36.9 million, $52.4 million and $32.5 million for the years ended December 31, 2019, 2018
and 2017, respectively. The total estimated grant date fair value of options vested during the period was $7.8 million, $5.3 million and $2.4 million for the
years ended December 31, 2019, 2018 and 2017, respectively.

The fair value of non-vested restricted stock units (“RSUs”) is based on the Company’s closing stock price on the date of grant. A summary for the

year ended December 31, 2019, is as follows:

Non-vested as of December 31, 2018

Granted

Vested

Forfeited

Non-vested as of December 31, 2019

11. Stock-Based Compensation

Employee Stock-Based Compensation

Shares
Underlying
RSUs
547,891    $

629,901    $

(180,842)   $

(110,920)   $

886,030    $

Weighted
Average
Grant Date
Fair Value

56.62   

87.72   

52.52   

69.77   

77.92   

Weighted
Remaining
Vesting
Period
(in years)

Aggregate
Intrinsic
Value
(in thousands)

2.45 $

38,067   

1.39 $

60,330   

The Company estimates the fair value of stock options using the Black-Scholes option valuation model. The fair value of employee stock options is
being amortized on a straight-line basis over the requisite service period of the awards. The fair value of employee stock options was estimated using the
weighted average assumptions below. Each of these inputs is subjective and its determination generally requires significant judgment.

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Table of Contents

Expected term (in years)

Expected volatility

Risk-free interest rate

Dividend yield

Year Ended December 31

2019

2018

2017

6.1

45.0  %

2.39  %

0.0  %

6.1

45.7  %

2.75  %

0.0  %

6.1

51.9  %

2.07  %

0.0  %

Fair Value of Common Stock— Prior to the completion of the Company’s IPO, the fair value of the shares of the Company’s common stock underlying
the stock options had historically been determined by the Company’s board of directors. Because there had been no public market for the Company’s
common  stock,  its  board  of  directors  determined  the  fair  value  of  the  Company’s  common  stock  at  the  time  of  grant  of  the  option  by  considering  a
number  of  objective  and  subjective  factors,  including  valuations  of  comparable  companies,  sales  of  the  Company’s  convertible  preferred  stock,  the
Company’s operating and financial performance, the lack of liquidity of the Company’s capital stock, and the general and industry-specific economic
outlooks.  For  stock  options  granted  after  the  completion  of  the  IPO,  the  Company’s  Board  of  Directors  determined  the  fair  value  of  each  share  of
underlying common stock based on the closing price of the Company’s common stock as reported on the date of grant.

Expected Term—The expected term represents the period that the share-based awards are expected to be outstanding. As the Company has very limited
historical information to develop reasonable expectations about future exercise patterns and post-vesting employment termination behavior for its stock-
option grants the Company has elected to use the “simplified method” as prescribed by authoritative guidance to compute expected term.

Expected Volatility—Since the Company does not have sufficient trading history for its common stock, the expected volatility was estimated based on the
average  volatility  for  comparable  publicly  traded  companies  over  a  period  equal  to  the  expected  term  of  the  stock  option  grants.  When  selecting
comparable publicly traded companies in a similar industry on which it has based its expected stock price volatility, the Company selected companies
with comparable characteristics to it, including enterprise value, risk profiles, position within the industry, and with historical share price information
sufficient to meet the expected life of the stock-based awards. The Company will continue to apply this process until a sufficient amount of historical
information regarding the volatility of its own stock price becomes available.

Risk-Free Interest Rate—The risk-free interest rate is based on the U.S. Treasury yield curve in effect on the date of grant for zero coupon U.S. Treasury
notes with maturities approximately equal to expected term of the option award.

Expected  Dividend  Yield—The  Company  has  never  paid  dividends  on  its  common  stock  and  has  no  plans  to  pay  dividends  on  its  common  stock.
Therefore, the Company used an expected dividend yield of zero.

In addition to the assumptions used in the Black-Scholes option-pricing model, the Company also estimates a forfeiture rate to calculate the stock-
based compensation for the Company’s equity awards. The Company will continue to use judgment in evaluating the expected volatility, expected terms and
forfeiture rates utilized for the Company’s stock-based compensation calculations on a prospective basis.

The following table summarizes the total stock-based compensation expense included in the statements of operations for all periods presented (in

thousands):

Cost of revenue

Research and development

Selling, general and administrative

Total stock-based compensation expense

Year Ended December 31

2019

2018

2017

$

$

658    $

193    $

4,462   

21,121   

3,057   

13,079   

26,241    $

16,329    $

589   

1,619   

7,544   

9,752   

As of December 31, 2019, there was total unamortized compensation costs of $8.9 million, net of estimated forfeitures, related to unvested stock
options, which the Company expects to recognize over a period of approximately 1.7 years $44.5 million, net of estimated forfeitures, related to unrecognized
RSU expense, which the Company expects to recognize over a period of 2.3 years, and $1.1 million unrecognized ESPP expense, which the Company will
recognize over 0.9 years.

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Performance based RSUs "PRSU"

In  February  2019,  the  Company  granted  PRSUs  to  key  executives  of  the  Company.  The  performance  equity  program  has  a  2-year  performance
period  measuring  target  revenue  compound  annual  growth  rate  (“CAGR”)  achievement  for  fiscal  year  2020  compared  to  fiscal  year  2018.  There  is  a
minimum performance threshold of 75% to earn 50% of target, and a maximum threshold of 125% achieved to earn 200% of target. The exact number of
earned shares will be determined based on linear interpolation using the actual revenue CAGR as it falls between the minimum and maximum thresholds
outlined above. The fair value of the PRSUs will be up to $18.5 million, depending on the actual achievement relative to the performance target. Based on
management’s assessment at December 31, 2019 of the Company’s achievement of its performance targets, the Company has determined that it is probable
that the performance targets will be achieved. As of December 31, 2019, management believes that it will achieve its performance targets at the 134% level,
and has recognized cumulative stock-based compensation expense of $4.8 million, for the year ended December 31, 2019.

12. Net Loss Per Common Share

As the Company had net losses for the years ended December 31, 2019, 2018 and 2017, all potential common shares were determined to be anti-
dilutive. The following table sets forth the computation of the basic and diluted net loss per share during the years ended December 31, 2019, 2018 and 2017
(in thousands, except share and per share data):

Numerator:

Net loss

Denominator:

Weighted-average shares used to compute net loss per common share, basic and diluted

Net loss per common share, basic and diluted

Year Ended December 31,

2019

2018

2017

(54,568)   $

(50,378)   $

(29,740)  

25,265,918   

23,885,858   

22,627,327   

(2.16)   $

(2.11)   $

(1.31)  

$

$

The following outstanding shares of potentially dilutive securities have been excluded from diluted net loss per common share for the years ended

December 31, 2019, 2018 and 2017 because their inclusion would be anti-dilutive:

Options to purchase common stock

RSUs issued and unvested

Warrants to purchase common stock

Total

Year Ended December 31,

2019
1,503,247   

886,030   

—   

2018
2,094,137   

547,891   

4,857   

2017
2,601,181   

468,426   

4,857   

2,389,277   

2,646,885   

3,074,464   

13. Selected Quarterly Financial Data (unaudited)

The following table presents selected unaudited financial data for each of the eight quarters in the two-year period ended December 31, 2019, which
have been updated to reflect the revisions discussed in Note 14. Revision of Prior Period Financial Statements and Note 1. Organization and Description of
Business. The revision of the third quarter 2018 was previously effected in the Company’s Quarterly Report on Form 10-Q for the third quarter of fiscal 2019
and  thus  the  impact  of  the  revision  on  such  periods  financial  data  is  not  reflected  below.  The  Company  will  effect  the  revision  of  its  unaudited  interim
financial statements as of and for the three months ended March 31, 2019 and as of and for the three and six-months ended June 30, 2019 when it issues its
Form 10-Q for the periods ended March 31 and June 30, 2020.

The Company believes this information reflects all recurring adjustments necessary to fairly state this information when read in conjunction with the
Company's financial statements and the related notes. Net loss per common share, basic and diluted, for the four quarters of each fiscal year may not sum to
the  total  for  the  fiscal  year  because  of  the  different  number  of  shares  outstanding  during  each  period.  The  results  of  operations  for  any  quarter  are  not
necessarily indicative of the results to be expected for any future period (in thousands of dollars, except for share and per share data):

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Quarter Ended
2019:

Total revenues

Gross profit

Net loss

Net loss per common share, basic and diluted

2018:

Total revenues

Gross profit

Net loss

Net loss per common share, basic and diluted

March 31

June 30

September 30

December 31

$

$

$

$

48,334    $

52,441    $

54,673    $

36,561   

(8,250)  

39,429   

(10,725)  

40,888   

(18,293)  

(0.34)   $

(0.43)   $

(0.72)   $

31,762    $

35,292    $

38,441    $

23,212   

(11,077)  

25,806   

(13,304)  

28,488   

(9,727)  

(0.47)   $

(0.56)   $

(0.40)   $

59,104   

45,189   

(17,300)  

(0.65)  

41,782   

30,976   

(16,270)  

(0.67)  

The impact of the revision on the unaudited quarterly financial data is as follows:
Quarter Ended

Total revenues

Gross profit

Net loss

Net loss per common share, basic and diluted

Quarter Ended

Total revenues

Gross profit

Net loss

Net loss per common share, basic and diluted

Quarter Ended

Total revenues

Gross profit

Net loss

Net loss per common share, basic and diluted

Quarter Ended

Total revenues

Gross profit

Net loss

Net loss per common share, basic and diluted

Quarter Ended

Total revenues

Gross profit

Net loss

105

As Reported

June 30, 2019

Adjustment

As Revised

53,331    $

(890)   $

40,506   

(11,467)  

(1,077)  

742   

(0.46)   $

0.03    $

52,441   

39,429   

(10,725)  

(0.43)  

As Reported

March 31, 2019

Adjustment

As Revised

47,214    $

1,120    $

35,484   

(8,019)  

1,077   

(231)  

(0.33)   $

(0.01)   $

48,334   

36,561   

(8,250)  

(0.34)  

As Reported

Adjustment

As Revised

December 31, 2018

43,155    $

(1,373)   $

32,626   

(14,713)  

(1,650)  

(1,557)  

(0.61)   $

(0.06)   $

41,782   

30,976   

(16,270)  

(0.67)  

As Reported

June 30, 2018

Adjustment

As Revised

35,469    $

(177)   $

25,979   

(12,206)  

(173)  

(1,098)  

(0.51)   $

(0.05)   $

35,292   

25,806   

(13,304)  

(0.56)  

As Reported

March 31, 2018

Adjustment

30,565    $

21,954   

(11,117)   $

1,197    $

1,258   

40    $

As Revised

31,762   

23,212   

(11,077)  

$

$

$

$

$

$

$

$

$

$

Table of Contents

Disaggregation of Revenue

During  the  preparation  of  the  Company’s  annual  financial  statements  for  the  year  ended  December  31,  2019,  the  Company  identified  a  $965  thousand
classification error in the presentation of contracted third-party payors and non-contracted third-party payors in the disaggregation of revenue disclosure in
Note 2. Summary of Significant Accounting Policies of its Quarterly Report on Form 10-Q for the period ended September 30, 2019. Previously reported
nine-month ended September 30, 2019 balances (in thousands) of $72,040 and $9,016 for contracted third-party payors and non-contracted third-party payors,
respectively,  should  have  been  $73,005  and  $8,051,  respectively.  The  Company  concluded  that  the  amounts  were  not  material  to  its  previously  issued
September 30, 2019 condensed consolidated financial statements. The error impacted the disclosures in the September 30, 2019 Form 10-Q but did not impact
the Company’s condensed consolidated balance sheets, statements of operations or statements of cash flows included in such 10-Q.

14. Revision of Prior Period Financial Statements

As  discussed  in  Note  1,  the  Company  has  revised  its  prior  period  financial  statements  to  correct  for  immaterial  errors  in  its  accounting  for  revenues,
contractual allowances, allowance for doubtful accounts and certain other items, the impact of which is presented below (in thousands, except share data):

Revised Consolidated Balance Sheets

Assets

Accounts receivable, net

Total current assets

Total assets

Liabilities and Stockholders’ Equity

Accrued liabilities

Deferred revenue

Total current liabilities

Total liabilities

Accumulated other comprehensive loss

Accumulated deficit

Total stockholders’ equity

Total liabilities and stockholders’ equity

As Reported 

Adjustment 

As Revised 

As of December 31, 2018

$

21,977    $

(2,187)   $

106,482   

119,710   

26,570   

1,243   

30,236   

65,288   

(41)  

(203,515)  

54,422   

119,710   

(2,187)  

(2,187)  

118   

(20)  

98   

98   

25   

(2,310)  

(2,285)  

(2,187)  

19,790   

104,295   

117,523   

26,688   

1,223   

30,334   

65,386   

(16)  

(205,825)  

52,137   

117,523   

106

 
 
 
Table of Contents

Revised Consolidated Statements of Operations

Revenue

Cost of revenue

Gross profit

Research and development

Selling, general and administrative

Total operating expenses

Loss from operations

Other income, net

Loss before income taxes

Net loss

Net loss per common share, basic and diluted

Revenue

Cost of revenue

Gross profit

Research and development

Selling, general and administrative

Total operating expenses

Loss from operations

Net loss

Net loss per common share, basic and diluted

Revised Consolidated Statements of Comprehensive Loss

Net loss

Net change in unrealized gains on available-for-sale securities

Comprehensive loss

Net loss

Comprehensive loss

As Reported

Adjustment

As Revised

Year ended December 31, 2018

$

147,293    $

(16)   $

38,579   

108,714   

20,750   

131,582   

152,332   

(43,618)  

1,526   

(48,236)  

(48,280)  

(2.02)  

216   

(232)  

110   

1,731   

1,841   

(2,073)  

(25)  

(2,098)  

(2,098)  

(0.09)  

147,277   

38,795   

108,482   

20,860   

133,313   

154,173   

(45,691)  

1,501   

(50,334)  

(50,378)  

(2.11)  

As Reported

Adjustment

As Revised

Year ended December 31, 2017

$

98,509    $

620    $

27,708   

70,801   

13,335   

84,737   

98,072   

(27,271)  

(29,420)  

(1.30)  

495   

125   

(70)  

515   

445   

(320)  

(320)  

(0.01)  

99,129   

28,203   

70,926   

13,265   

85,252   

98,517   

(27,591)  

(29,740)  

(1.31)  

As Reported

Adjustment

As Revised

Year ended December 31, 2018

(48,280)   $

(2,098)   $

24   

(48,256)  

25   

(2,073)  

(50,378)  

49   

(50,329)  

As Reported

Adjustment

As Revised

Year ended December 31, 2017

(29,420)   $

(29,476)  

(320)   $

(320)  

(29,740)  

(29,796)  

$

$

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Table of Contents

Revised Consolidated Statements of Cash Flows

Cash flows from operating activities 

Net loss 

Adjustments to reconcile net loss to net cash used in operating activities: 

Provision for bad debt and contractual allowances 

Changes in operating assets and liabilities: 

Accounts receivable 

Accrued liabilities 

Deferred revenue 

Net cash used in operating activities 

Cash flows from investing activities 

Purchases of available-for-sale investments 

Net cash provided by investing activities 

Cash flows from operating activities

Net loss

Adjustments to reconcile net loss to net cash used in operating activities:

Stock-based compensation

Provision for bad debt and contractual allowances

Changes in operating assets and liabilities:

Accounts receivable

Accrued liabilities

Supplemental disclosures of cash flow information

Property, plant and equipment costs included in liabilities

Revised Consolidated Statements of Shareholder's Equity

As Reported

Adjustment

As Revised

Year ended December 31, 2018

  $

(48,280)   $

(2,098)   $

(50,378)  

15,218   

(22,885)  

10,776   

5   

(29,068)  

(93,158)  

34,117   

1,230   

1,138   

(275)  

(20)  

(25)  

25   

25   

16,448   

(21,747)  

10,501   

(15)  

(29,093)  

(93,133)  

34,142   

As Reported

Adjustment

As Revised

Year ended December 31, 2017

$

(29,420)   $

(320)   $

(29,740)  

10,123   

9,403   

(12,950)  

5,364   

35   

(371)  

(181)  

479   

393   

75   

9,752   

9,222   

(12,471)  

5,757   

110   

Unrealized loss on investments

$

Accumulated other comprehensive loss ending balance

Accumulated deficit beginning balance

Net loss

Accumulated deficit ending balance

Total stockholders' equity

As Reported

Adjustment

As Revised

Year Ended December 31, 2018

24    $

(41)  

(156,589)  

(48,280)  

(203,515)  

54,422   

25    $

25   

(212)  

(2,098)  

(2,310)  

(2,285)  

49   

(16)  

(156,801)  

(50,378)  

(205,825)  

52,137   

108

 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Accumulated deficit beginning balance

$

(127,169)   $

108    $

Net loss

Accumulated deficit ending balance

Total stockholders' equity

(29,420)  

(156,589)  

79,553   

(320)  

(212)  

(212)  

(127,061)  

(29,740)  

(156,801)  

79,341   

As Reported

Adjustment

As Revised

Year Ended December 31, 2017

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None.

Item 9A. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to provide reasonable assurance that information required to be disclosed by us in
reports that we file or submit under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) is recorded, processed, summarized and reported
within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including
our Chief Executive Officer (“CEO”) (principal executive officer) and Chief Financial Officer (“CFO”) (principal financial officer), as appropriate, to allow
for  timely  decisions  regarding  required  disclosure.  In  designing  and  evaluating  the  disclosure  controls  and  procedures,  management  recognizes  that  any
controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and
management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As  required  by  Rule  13a-15(b)  under  the  Exchange  Act,  our  management,  including  our  CEO  and  CFO,  has  evaluated  the  effectiveness  of  our
disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act) as of the end of the period covered by this report. Based on that
evaluation, our CEO and our CFO have concluded that as of December 31, 2019, our disclosure controls and procedures were not effective because of the
material weaknesses in internal controls, and as disclosed below. Notwithstanding these material weaknesses, our management, including our CEO and CFO,
has  concluded  that  our  consolidated  financial  statements,  included  in  the  2019  Annual  Report  on  Form  10-K,  fairly  present,  in  all  material  respects,  our
financial condition, results of operations and cash flows for the periods presented in conformity with generally accepted accounting principles, and that they
can still be relied upon.

Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rule
13a-15(f) of the Exchange Act. Our management has assessed the effectiveness of our internal control over financial reporting as of December 31, 2019 using
the  criteria  established  in  “Internal  Control—Integrated  Framework”  (2013),  issued  by  the  Committee  of  Sponsoring  Organizations  of  the  Treadway
Commission ("COSO"). A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a
reasonable  possibility  that  a  material  misstatement  of  the  Company’s  annual  or  interim  financial  statements  will  not  be  prevented  or  detected  on  a  timely
basis. Based on that assessment, our management has concluded that the Company did not maintain effective internal control over financial reporting as of
December  31,  2019  because  of  the  following  material  weaknesses  in  internal  control  over  financial  reporting,  disclosed  in  the  Company’s  2018  Annual
Report on Form 10-K, which continue to exist as of December 31, 2019:

• We did not design or maintain an effective control environment commensurate with our financial reporting requirements. Given the rapid growth in
the  size  and  complexity  of  the  business,  we  failed  to  maintain  a  sufficient  number  of  professionals  with  an  appropriate  level  of  accounting  and
internal  control  knowledge,  training  and  experience  to  appropriately  analyze,  record  and  disclose  accounting  matters  timely  and  accurately.  This
material weakness contributed to the additional material weaknesses below.

• We did not effectively execute our controls over our financial statement close process, to ensure the prevention or detection of a misstatement that
could be material. Specifically, we concluded we did not have an effective business performance review control used to monitor the completeness
and accuracy of the financial results and to identify potential failures in lower level controls. This control may not detect errors in a timely manner
that could be material

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Table of Contents

to our interim or annual financial statements. Additionally, we did not have appropriate control over the review of journal entries to ensure that they
were properly supported and recorded completely and accurately.

• We  did  not  maintain  effective  controls  with  respect  to  the  review  of  the  accounting  for  revenue  and  related  accounts  receivable,  including
maintaining effective controls to prevent or detect errors in the assessment of bad debt and revenue reserves. Specifically, we did not detect errors
within the contractual allowance and bad debt expense analyses which resulted in immaterial misstatements to revenue, accounts receivable and bad
debt expense.

These material weaknesses resulted in the misstatement of our revenues, revenue reserves, bad debt expense, property and equipment, research and
development expense and related financial disclosures, and in the revision of the Company’s consolidated financial statements for the years ended December
31,  2017,  December  31,  2018,  and  each  interim  period  therein  as  well  as  the  quarters  ended  March  31,  2019,  June  30,  2019,  and  September  30,  2019.
Additionally, these material weaknesses could result in a misstatement of account balances or disclosures that would result in a material misstatement to the
annual or interim consolidated financial statements that would not be prevented or detected.

The effectiveness of the Company’s internal control over financial reporting as of December 31, 2019 has been audited by PricewaterhouseCoopers

LLP, an independent registered public accounting firm, as stated in their report which is included in Part IV, Item 15 of this Annual Report on Form 10-K.

Remediation Plan Activities

Management continues to execute its action plan to remediate the underlying causes that gave rise to the material weaknesses. The following steps were

performed as of December 31, 2019 to enhance our internal control environment:

•

Increased the depth and experience of our Finance organization by hiring individuals with technical experience in accounting, auditing and reporting
matters and provided several internal control trainings to Finance staff and managers;

• Hired  an  Internal  Audit  Director  who  is  focused  on  enhancing  the  effectiveness  of  our  overall  control  environment  and  system  of  controls  over

•

•
•

financial reporting;
Enhanced the design of key controls in the order to cash cycle;
Implemented  a  business  performance  review  control  to  monitor  the  completeness  and  accuracy  of  the  financial  results  and  to  identify  potential
failures in lower level controls;
Enhanced  the  design  of  key  controls  over  journal  entries  and  the  accuracy  and  completeness  of  key  reports  used  in  the  preparation  of  our
consolidated financial statements.
We  will  continue  to  build  on  the  progress  we  have  made  in  our  remediation  efforts.  In  particular,  we  will  focus  on  strengthening  and  enforcing
controls in the financial close process, filling the remaining key roles in the Finance organization, and providing more internal control and accounting training
for  Finance  staff  and  managers.  However,  the  material  weaknesses  will  not  be  considered  remediated  until  the  applicable  controls  operate  for  a  sufficient
period of time for management to conclude, through testing, that such controls are operating effectively.

Inherent Limitations on Effectiveness of Controls

Our management, including our Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls and procedures or
our internal control over financial reporting will prevent or detect all error and all fraud. A control system, no matter how well designed and operated, can
provide only reasonable, not absolute, assurance that the control system’s objectives will be met. The design of a control system must reflect the fact that
there are resource constraints, and the benefits of controls must be considered relative to their costs. Further, because of the inherent limitations in all control
systems,  no  evaluation  of  controls  can  provide  absolute  assurance  that  misstatements  due  to  error  or  fraud  will  not  occur  or  that  all  control  issues  and
instances of fraud, if any, within a company have been detected. These inherent limitations include the realities that judgments in decision-making can be
faulty  and  that  breakdowns  can  occur  because  of  simple  error  or  mistake.  Controls  can  also  be  circumvented  by  the  individual  acts  of  some  persons,  by
collusion of two or more people or by management override of the controls. The design of any system of controls is based in part on 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. Projections of any evaluation of controls effectiveness to future periods are subject to risks. Over time, controls may become inadequate because
of changes in conditions or deterioration in the degree of compliance with policies or procedures.

Changes in internal control over financial reporting

110

Table of Contents

As required by Rule 13a-15(d) under the Exchange Act, our management, including our principal executive officer and principal financial officer,
has evaluated our internal control over financial reporting to determine whether any changes to our internal control over financial reporting occurred during
the quarter ended December 31, 2019 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
Based on that evaluation, other than the changes discussed above in connection with the changes designed and implemented as a result of our remediation
plan  of  the  previously  identified  material  weakness,  there  were  no  changes  that  have  materially  affected,  or  are  reasonably  likely  to  materially  affect,  our
internal control over financial reporting for the year ended December 31, 2019.

Item 9B. Other Information.

None.

111

Table of Contents

Item 10. Directors, Executive Officers and Corporate Governance.

PART III

The information required by this item is incorporated by reference from our definitive Proxy Statement to be filed with the SEC in connection with

our 2020 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2019.

Item 11. Executive Compensation.

The information required by this item is incorporated by reference from our definitive Proxy Statement to be filed with the SEC in connection with

our 2020 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2019.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by this item is incorporated by reference from our definitive Proxy Statement to be filed with the SEC in connection with

our 2020 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2019.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required by this item is incorporated by reference from our definitive Proxy Statement to be filed with the SEC in connection with

our 2020 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2019.

Item 14. Principal Accounting Fees and Services.

The information required by this item is incorporated by reference from our definitive Proxy Statement to be filed with the SEC in connection with

our 2020 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2019.

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Table of Contents

Item 15. Exhibits, Financial Statement Schedules.

(a)

List the following documents filed as a part of this Annual Report on Form 10-K:

PART IV

(i)

(ii)

(iii)

All financial statements;

Those financial statement schedules required to be filed by Item 8 of this form, and by paragraph (b) below. All financial statement
schedules are omitted because they are not applicable or the amounts are immaterial or the required information is presented in the
consolidated financial statements and notes thereto in Part II, Item 8 above.

Those exhibits required by Item 601 of Regulation S-K (§ 229.601 of this chapter) and by paragraph (b) below. Identify in the list
each management contract or compensatory plan or arrangement required to be filed as an exhibit to this form pursuant to Item
15(b) of this report.

(b)

(c)

Registrants shall file, as exhibits to this form, the exhibits required by Item 601 of Regulation S-K (§ 229.601 of this chapter).

Registrants shall file, as financial statement schedules to this form, the financial statements required by Regulation S-X (17 CFR 210)
which are excluded from the annual report to shareholders by Rule 14a-3(b) including (1) separate financial statements of subsidiaries not
consolidated and fifty percent or less owned persons; (2) separate financial statements of affiliates whose securities are pledged as
collateral; and (3) schedules.

113

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Exhibit Index

Incorporated by Reference

Exhibit
Number

Exhibit Title

3.1 

3.2 

4.1 

4.2 

4.3 

4.4 

4.8 

10.1+

10.2+

10.3+

10.4+

10.5+

10.6 

10.7 

10.8 

10.9 

10.10 

10.11 

10.12 

10.13 

10.14 

10.15 

10.16 

10.17 

10.18 

10.19 

10.20±

  Amended and Restated Certificate of Incorporation of the Registrant.
  Amended and Restated Bylaws of the Registrant.
  Specimen Common Stock Certificate of the Registrant.
  Amended and Restated Investors’ Rights Agreement dated May 16, 2014 by and

among the Registrant and certain stockholders.

  Description of the Registrant's securities registered pursuant to section 12 of the

securities exchange act of 1934.

  First amendment to third amended and restated loan and security agreement.
  Warrant to Purchase Stock issued to Life Science Loans, LLC dated as of June

3, 2014.
Form of Indemnification Agreement for directors and executive officers.

2006 Stock Plan, as amended, and Form of Option Agreement thereunder.

2016 Equity Incentive Plan and related form agreements.

2016 Employee Stock Purchase Plan and related form agreements.

Executive Incentive Compensation Plan.

  Manufacturing Services Agreement dated March 1, 2009 between the Registrant

and Jabil Circuit, Inc.

  Memorandum of Understanding dated February 16, 2015 between the Registrant

and Jabil Circuit, Inc.

  Warland Business Park Lease dated April 20, 2015 between the Registrant and

Warland Investments Company.

  Office Lease dated April 30, 2008 between the Registrant and 650 Townsend

Associates, LLC.

  First Amendment to Lease dated February 26, 2010 between the Registrant and

650 Townsend Associates, LLC.

  Second Amendment to Lease dated December 19, 2011 between the Registrant

and 650 Townsend Associates, LLC.

  Third Amendment to Lease dated January 8, 2014 between the Registrant and
Big Dog Holdings, LLC, as successor in interest to 650 Townsend Associates
LLC.

  Fourth Amendment to Lease dated April 22, 2015 between the Registrant and
Big Dog Holdings, LLC, as successor in interest to 650 Townsend Associates
LLC.

  Fifth Amendment to Lease dated November 20, 2015 between the Registrant

and Big Dog Holdings, LLC, as successor in interest to 650 Townsend
Associates LLC.

  Sixth Amendment to Lease dated August 10, 2016 between the Registrant and
Big Dog Holdings, LLC, as successor in interest to 650 Townsend Associates
LLC.

  Sublease dated October 29, 2009 between the Registrant and Freedomroads,

LLC.

  First Amendment to Sublease dated June 1, 2010 between the Registrant and

Freedomroads, LLC.

  Second Amendment to Sublease dated September 24, 2013 between the

Registrant, Freedomroads, LLC and FRHP Lincolnshire, LLC.

  Sublease dated April 15, 2014 between the Registrant and Lone Star R.S.

Platou, Inc.
Services Agreement dated December 24, 2013 between the Registrant and
XIFIN, Inc.

Form

8-K

8-K

S-1

S-1/A

10-K

10-K

S-1

S-1

S-1

S-1/A

S-1/A

S-1/A

S-1

S-1

S-1

File No.

001-37918

001-37918

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

333-213773

S-1/A

333-213773

Exhibit

Filing Date

3.1 

3.2 

4.1 

4.2 

4.3 

4.4 

4.8 

10.1 

10.2 

10.3 

10.4 

10.5 

10.6 

10.7 

10.8 

10.9 

October 26, 2016

October 26, 2016

September 23, 2016

October 7, 2016

March 2, 2020

March 2, 2020

September 23, 2016

September 23, 2016

September 23, 2016

October 7, 2016

October 7, 2016

October 7, 2016

September 23, 2016

September 23, 2016

September 23, 2016

October 7, 2016

S-1

S-1

S-1

S-1

S-1

S-1

333-213773

10.10 

September 23, 2016

333-213773

10.11 

September 23, 2016

333-213773

10.12 

September 23, 2016

333-213773

10.13 

September 23, 2016

333-213773

10.14 

September 23, 2016

333-213773

10.15 

September 23, 2016

S-1/A

333-213773

10.16 

October 7, 2016

S-1/A

333-213773

10.17 

October 7, 2016

S-1

S-1

S-1

333-213773

10.18 

September 23, 2016

333-213773

10.19 

September 23, 2016

333-213773

10.20 

September 23, 2016

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

10.21 

10.22 

10.23 

10.24 

10.25+

10.26+

10.27+

10.28+

10.29 

10.30 

10.31 

10.32 

10.33 

10.34 

10.35 

10.36 

10.37 

10.38 

10.39 

21.10 

23.10 

31.10 

31.20 

32.1†

  Second Amended and Restated Loan and Security Agreement dated December

4, 2015 between the Registrant and Silicon Valley Bank.

  Loan Agreement dated December 4, 2015 between the Registrant and

Biopharma Secured Investments III Holdings Cayman LP.

  Guaranty and Security Agreement dated December 4, 2015 by the Registrant
and each other grantor from time to time party thereto in favor of Biopharma
Secured Investments III Holdings Cayman LP.

  Note Purchase Agreement dated November 16, 2012, as amended, by and

between the Registrant and California HealthCare Foundation, exhibits related
thereto and related Promissory Note.
Employment Letter to Kevin M. King dated July 23, 2012 between the
Registrant and Kevin M. King.
Employment Letter to David A. Vort dated November 22, 2013 between the
Registrant and David A. Vort.
Employment Letter to Derrick Sung dated March 24, 2015 between the
Registrant and Derrick Sung.
Employment Letter to Matthew C. Garrett dated December 2, 2012 between the
Registrant and Matthew C. Garrett.

  Form of Change of Control and Severance Agreement to be effective upon the

closing of the offering.

  Office Lease (Suite 500) dated August 9, 2016 between the Registrant and Big

Dog Holdings, LLC.

  Note and Warrant Purchase Agreement dated November 1, 2012, by and among
the Registrant and the persons and entities listed on the Schedule of Investors
attached thereto as Exhibit A and exhibits related thereto.

  Office Lease dated May 1, 2017 between the Registrant and Radler Limited

Partnership.

  Employment Letter to Karim Karti dated June 12, 2018 between the Registrant

and Karim Karti.

  First Amendment to Lease dated June 5, 2018 between the Registrant and

Warland Investments Company.

  Office Lease dated October 4, 2018 between the Registrant and Big Dog

Holdings LLC.

  Third Amended and Restated Loan and Security Agreement, dated as of October
23, 2018, between Silicon Valley Bank, a California corporation, and iRhythm
Technologies, Inc., a Delaware corporation.

  2016 Employee Stock Purchase Plan, as amended February 26, 2019, and

related form agreements.

  Employment Letter to Mark Day dated September 3, 2007 between the

Registrant and Mark Day.

  Development collaboration agreement by and among Verily Life Sciences LLC,

Verily Ireland Limited, and iRhythm Technologies, Inc.

  List of Subsidiaries of Registrant.
  Consent of Independent Registered Public Accounting Firm
  Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and

15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002.

  Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-

14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002.
Certification of Principal Executive Officer and Principal Financial Officer
Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002.

S-1/A

333-213773

10.21 

October 7, 2016

S-1

S-1

333-213773

10.22 

September 23, 2016

333-213773

10.23 

September 23, 2016

S-1/A

333-213773

10.24 

October 7, 2016

S-1

S-1

S-1

S-1

333-213773

10.25 

September 23, 2016

333-213773

10.26 

September 23, 2016

333-213773

10.27 

September 23, 2016

333-213773

10.28 

September 23, 2016

10-Q

333-213773

10.29 

November 14, 2017

S-1

333-213773

10.30 

September 23, 2016

S-1/A

333-213773

10.31 

October 7, 2016

10-Q

10-Q

10-Q

333-213773

10.32 

August 7, 2017

333-213773

10.33 

August 3, 2018

333-213773

10.34 

August 3, 2018

8-K

333-213773

10.1 

October 29, 2018

10-Q

10-Q

10-Q

S-1

333-213773

10.37 

December 23, 2019

333-213773

10.38 

December 23, 2019

333-213773

10.39 

December 23, 2019

333-213773

21.1 

September 23, 2016

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

101.INS

101.SCH

101.CAL

101.DEF

101.LAB

101.PRE

XBRL Instance Document

XBRL Taxonomy Extension Schema Document

XBRL Taxonomy Extension Calculation Linkbase Document

XBRL Taxonomy Extension Definition Linkbase Document

XBRL Taxonomy Extension Label Linkbase Document

XBRL Taxonomy Extension Presentation Linkbase Document

________________________________________________________________________________________________
†

The certifications attached as Exhibit 32.1 and 32.2 that accompany this Annual Report on Form 10-K, are deemed furnished and not filed with the Securities and
Exchange Commission and are not to be incorporated by reference into any filing of iRhythm Technologies, Inc. under the Securities Act of 1933, as amended, or the
Securities Exchange Act of 1934, as amended, whether made before or after the date of this Annual Report on Form 10-K, irrespective of any general incorporation
language contained in such filing.
Indicates management contract or compensatory plan.
Confidential treatment has been requested for portions of this exhibit. These portions have been omitted and have been filed separately with the Securities and
Exchange Commission.

†
†

Table of Contents

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report

to be signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Date: March 2, 2020

Company Name

By:

/s/ Kevin M. King

Kevin M. King
President and Chief Executive Officer
(Principal Executive Officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on

behalf of the Registrant in the capacities and on the dates indicated.

Name

Title

Date

/s/ Kevin M. King

Kevin M. King

/s/ Matthew C. Garrett

Matthew C. Garrett

President, Chief Executive Officer and Director
(Principal Executive Officer)

Chief Financial Officer
(Principal Financial Officer)

/s/ Bruce G. Bodaken

Director

Bruce G. Bodaken

/s/ Ralph Snyderman M.D.

Director

Ralph Snyderman M.D.

/s/ C. Noel Bairey Merz, M.D.

Director

C. Noel Bairey Merz, M.D.

/s/ Mark J. Rubash

Mark J. Rubash

Director

/s/ Raymond W. Scott

Director

Raymond W. Scott

March 2, 2020

March 2, 2020

March 2, 2020

March 2, 2020

March 2, 2020

March 2, 2020

March 2, 2020

/s/ Abhijit Y. Talwalkar

Director and Chairman of the Board

March 2, 2020

Abhijit Y. Talwalkar

DESCRIPTION OF THE REGISTRANT’S SECURITIES
REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES
EXCHANGE ACT OF 1934

Exhibit 4.3

iRhythm  Technologies,  Inc.  (the  “Company”)  has  one  class  of  securities  registered  under  Section  12  of  the  Securities  Exchange  Act  of  1934,  as

amended: our common stock, par value $0.0001 per share.

As used in this summary, the terms “iRhythm,” “the Company,” “we,” “our” and “us” refer to iRhythm Technologies, Inc.

        The following is a description of the material terms and provisions relating to our common stock. The following description is a summary that is not
complete and is subject to and qualified in its entirety by reference to our amended and restated certificate of incorporation and our amended and restated
bylaws, and to provisions of the Delaware General Corporation Law. Copies of our amended and restated certificate of incorporation and our amended and
restated bylaws, each of which may be amended from time to time, are included as exhibits to the Annual Report on Form 10-K to which this description is an
Exhibit.

General

Our authorized capital stock consists of 100,000,000 shares of common stock, $0.001 par value per share, and 5,000,000 shares of preferred stock,

$0.001 par value per share.

Common Stock

Voting Rights

Each holder of our common stock is entitled to one vote for each share on all matters submitted to a vote of the stockholders, including the election
of directors. Our stockholders do not have cumulative voting rights in the election of directors. Accordingly, holders of a majority of the voting shares are
able to elect all of the directors.

Dividends

Subject to preferences that may be applicable to any then outstanding preferred stock, holders of our common stock are entitled to receive dividends,
if  any,  as  may  be  declared  from  time  to  time  by  our  board  of  directors  out  of  legally  available  funds.  We  do  not  have  any  plans  to  pay  dividends  to  our
stockholders.

Liquidation

In  the  event  of  our  liquidation,  dissolution  or  winding  up,  holders  of  our  common  stock  will  be  entitled  to  share  ratably  in  the  net  assets  legally
available for distribution to stockholders after the payment of all of our debts and other liabilities and the satisfaction of any liquidation preference granted to
the holders of any then outstanding shares of preferred stock.

Rights and Preferences

Holders of our common stock have no preemptive, conversion, subscription or other rights, and there are no redemption or sinking fund provisions
applicable to our common stock. The rights, preferences and privileges of the holders of our common stock are subject to and may be adversely affected by
the rights of the holders of shares of any series of our preferred stock that we may designate in the future.

        -1-

Anti-Takeover Effects or Provisions of our Amended and Restated Certificate of Incorporation, our Amended and Restated Bylaws and Delaware
Law

Some provisions of Delaware law and our amended and restated certificate of incorporation and our amended and restated bylaws contain provisions
that  could  make  the  following  transactions  more  difficult:  acquisition  of  us  by  means  of  a  tender  offer;  acquisition  of  us  by  means  of  a  proxy  contest  or
otherwise; or removal of our incumbent officers and directors. It is possible that these provisions could make it more difficult to accomplish or could deter
transactions that stock holders may otherwise consider to be in their best interest or in our best interests, including transactions that might result in a premium
over the market price for our shares.

These provisions, summarized below, are expected to discourage coercive takeover practices and inadequate takeover bids. These provisions are also
designed  to  encourage  persons  seeking  to  acquire  control  of  us  to  first  negotiate  with  our  board  of  directors.  We  believe  that  the  benefits  of  increased
protection  of  our  potential  ability  to  negotiate  with  the  proponent  of  a  non-friendly  or  unsolicited  proposal  to  acquire  or  restructure  us  outweigh  the
disadvantages of discouraging these proposals because negotiation of these proposals could result in an improvement of their terms.

Delaware Anti-Takeover Statute

We are subject to Section 203 of the General Corporation Law of the State of Delaware, which prohibits a Delaware corporation from engaging in
any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder,
with the following exceptions:

•

before such date, the board of directors of the corporation approved either the business combination or the transaction that resulted

in the stockholder becoming an interested holder;

•

upon completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder
owned at least 85% of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of determining the
voting  stock  outstanding  (but  not  the  outstanding  voting  stock  owned  by  the  interested  stockholder)  those  shares  owned  (i)  by  persons  who  are
directors and also officers and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether
shares held subject to the plan will be tendered in a tender or exchange offer; or

•

on or after such date, the business combination is approved by the board of directors and authorized at an annual or special meeting
of the stockholders, and not by written consent, by the affirmative vote of at least 662/3% of the outstanding voting stock that is not owned by the
interested stockholder.

In general, Section 203 defines business combination to include the following:

•

•

•

any merger or consolidation involving the corporation and the interested stockholder;

any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the interested stockholder;

subject  to  certain  exceptions,  any  transaction  that  results  in  the  issuance  or  transfer  by  the  corporation  of  any  stock  of  the

corporation to the interested stockholder;

•

any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series

of the corporation beneficially owned by the interested stockholder; or

•

the receipt by the interested stockholder of the benefit of any loss, advances, guarantees, pledges or other financial benefits by or

through the corporation.

        -2-

In general, Section 203 defines interested stockholder as an entity or person beneficially owning 15% or more of the outstanding voting stock of the

corporation or any entity or person affiliated with or controlling or controlled by such entity or person.

Undesignated Preferred Stock

The ability to authorize undesignated preferred stock makes it possible for our board of directors to issue preferred stock with voting or other rights
or preferences that could impede the success of any attempt to acquire us. These and other provisions may have the effect of deterring hostile takeovers or
delaying changes in control or management of our company.

Special Stockholder Meetings

Our amended and restated bylaws provide that a special meeting of stockholders may be called only by our board of directors, the chairperson of our
board of directors, or our Chief Executive Officer or President. This provision might delay the ability of our stockholders to force consideration of a proposal
or for stockholders controlling a majority of our capital stock to take any action, including the removal of directors.

Requirements for Advance Notification of Stockholder Nominations and Proposals

Our  amended  and  restated  bylaws  contain  advance  notice  procedures  with  respect  to  stockholder  proposals  and  the  nomination  of  candidates  for
election as directors, other than nominations made by or at the direction of the board of directors or a committee of the board of directors. Our amended and
restated bylaws also specify certain requirements regarding the form and content of a stockholder’s notice.

Elimination of Stockholder Action by Written Consent

Our amended and restated certificate of incorporation and our amended and restated bylaws do not contain the right of stockholders to act by written
consent without a meeting. As a result, a holder controlling a majority of our capital stock would not be able to amend our amended and restated bylaws or
remove directors without holding a meeting of our stockholders called in accordance with our amended and restated bylaws.

Classified Board; Election and Removal of Directors

Our amended and restated certificate of incorporation and amended and restated bylaws authorize only our board of directors to fill vacant
directorships, including newly created seats. In addition, the number of directors constituting our board of directors is permitted to be set only by a resolution
adopted by our board of directors. These provisions would prevent a stockholder from increasing the size of our board of directors and then gaining control of
our board of directors by filling the resulting vacancies with its own nominees. This makes it more difficult to change the composition of our board of
directors but promotes continuity of management.

Our board of directors is divided into three classes. The directors in each class serve for a three-year term, one class being elected each year by our

stockholders, with staggered three-year terms. Only one class of directors is elected at each annual meeting of our stockholders, with the other classes
continuing for the remainder of their respective three-year terms. Because our stockholders do not have cumulative voting rights, our stockholders holding a
majority of the shares of common stock outstanding are able to elect all of our directors. In addition, our amended and restated certificate of incorporation
provides that directors may only be removed for cause. This system of electing and removing directors may tend to discourage a third party from making a
tender offer or otherwise attempting to obtain control of us, because it generally makes it more difficult for stockholders to replace a majority of the directors.

Choice of Forum

Our amended and restated certificate of incorporation provides that, unless we consent in writing to the selection of an alternative forum, the Court

of Chancery of the State of Delaware will be the exclusive forum for any

        -3-

derivative action or proceeding brought on our behalf, any action asserting a breach of fiduciary duty, any action asserting a claim against us arising pursuant
to the Delaware General Corporation Law, our amended and restated certificate of incorporation or our amended and restated bylaws, or any action asserting a
claim against us that is governed by the internal affairs doctrine.

Amendment of Charter Provisions

The amendment of any of the above provisions, except for the provision making it possible for our board of directors to issue preferred stock, would

require approval by holders of at least 662/3% of the voting power of our then outstanding voting stock.

The provisions of the Delaware General Corporation Law, our amended and restated certificate of incorporation and our amended and restated

bylaws may have the effect of discouraging others from attempting hostile takeovers and, as a consequence, they may also inhibit temporary fluctuations in
the market price of our common stock that often result from actual or rumored hostile takeover attempts. These provisions may also have the effect of
preventing changes in our management. It is possible that these provisions could make it more difficult to accomplish transactions that stockholders may
otherwise deem to be in their best interests.

Limitations on Liability and Indemnification Matters

Our amended and restated certificate of incorporation contains provisions that limit the liability of our directors for monetary damages to the fullest

extent permitted by Delaware law. Consequently, our directors will not be personally liable to us or our stockholders for monetary damages for any breach of
fiduciary duties as directors, except liability for:

•

•

•

•

any breach of the director’s duty of loyalty to us or our stockholders;

any act or omission not in good faith or that involves intentional misconduct or a knowing violation of law;

unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the Delaware General Corporation
Law; and

any transaction from which the director derived an improper personal benefit.

Our amended and restated certificate of incorporation and amended and restated bylaws provide that we are required to indemnify our directors and

officers, in each case to the fullest extent permitted by Delaware law. Our amended and restated bylaws also provide that we are obligated to advance
expenses incurred by a director or officer in advance of the final disposition of any action or proceeding, and permit us to secure insurance on behalf of any
officer, director, employee or other agent for any liability arising out of his or her actions in that capacity regardless of whether we would otherwise be
permitted to indemnify him or her under Delaware law. We have entered, and expect to continue to enter, into agreements to indemnify our directors,
executive officers and other employees as determined by our board of directors. With specified exceptions, these agreements provide for indemnification for
related expenses including, among other things, attorneys’ fees, judgments, fines and settlement amounts incurred by any of these individuals in any action or
proceeding. We believe that these bylaw provisions and indemnification agreements are necessary to attract and retain qualified persons as directors and
officers. We also maintain directors’ and officers’ liability insurance.

The limitation of liability and indemnification provisions in our amended and restated certificate of incorporation and amended and restated bylaws
may discourage stockholders from bringing a lawsuit against our directors and officers for breach of their fiduciary duty. They may also reduce the likelihood
of derivative litigation against our directors and officers, even though an action, if successful, might benefit us and our stockholders. Further, a stockholder’s
investment may be adversely affected to the extent that we pay the costs of settlement and damages.

Exchange Listing

Our common stock is quoted on The Nasdaq Global Select Market under the symbol “IRTC.”

        -4-

 
 
 
 
Transfer Agent

The  transfer  agent  for  our  common  stock  is  Equiniti  Trust  Company  d/b/a  EQ  Shareowner  Services.  The  transfer  agent’s  address  is  1110  Centre
Pointe  Curve,  Suite  101,  Mendota  Heights,  Minnesota,  55120.  Our  shares  of  common  stock  are  issued  in  uncertificated  form  only,  subject  to  limited
exceptions.

        -5-

FIRST AMENDMENT
TO
THIRD AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT

This First Amendment to Third Amended and Restated Loan and Security Agreement (this “Amendment”) is entered into this 26th
day  of  February,  2020,  by  and  between  SILICON  VALLEY  BANK  (“Bank”)  and  IRHYTHM  TECHNOLOGIES,  INC.,  a  Delaware
corporation (“Borrower”), whose address is 650 Townsend Street, Suite 500, San Francisco, California 94103.

RECITALS

A. Bank and Borrower have entered into that certain Third Amended and Restated Loan and Security Agreement dated as of October

23, 2018 (as the same may from time to time be amended, modified, supplemented or restated, the “Loan Agreement”).

B. Bank has extended credit to Borrower for the purposes permitted in the Loan Agreement.

C. Borrower has requested that Bank amend the Loan Agreement to (i) revise the definition of Cash Equivalents and (ii) make certain

other revisions to the Loan Agreement as more fully set forth herein.

D. Bank has agreed to so amend certain provisions of the Loan Agreement, but only to the extent, in accordance with the terms, subject

to the conditions and in reliance upon the representations and warranties set forth below.

AGREEMENT

        NOW, THEREFORE, in consideration of the foregoing recitals and other good and valuable consideration, the receipt and adequacy of
which is hereby acknowledged, and intending to be legally bound, the parties hereto agree as follows:

Definitions. Capitalized  terms  used  but  not  defined  in  this  Amendment  shall  have  the  meanings  given  to  them  in  the  Loan

1.
Agreement.

2. Amendments to Loan Agreement.

2.1 Section 7.1 (Dispositions). The first clause of Section 7.1 is amended in its entirety and replaced with the following:

“Convey,  sell,  lease,  transfer,  assign,  or  otherwise  dispose  of  (including,  without  limitation,  pursuant  to  a  Division)
(collectively, “Transfer”),”

2.2 Section 7.3 (Mergers or Acquisitions). The first sentence of Section 7.3 is amended in its entirety and replaced with the

following:

“Except  for  Permitted  Acquisitions,  merge  or  consolidate,  or  permit  any  of  its  Subsidiaries  to  merge  or  consolidate,
with any other Person, or acquire, or permit any of its Subsidiaries to acquire, all or substantially all of the capital stock
or property of another Person (including, without limitation, pursuant to a Division.)”

1

2.3 Section 13 (Definitions). The following term and its definition set forth in Section 13.1 are amended in their entirety and

replaced with the following:

“  “Cash  Equivalents”  means  (a)  marketable  direct  obligations  issued  or  unconditionally  guaranteed  by  the  United
States or any agency or any State thereof having maturities of not more than one (1) year from the date of acquisition;
(b) commercial paper maturing no more than one (1) year after its creation and having the highest rating from either
Standard & Poor’s Ratings Group or Moody’s Investors Service, Inc.; (c) Bank’s certificates of deposit issued maturing
no more than one (1) year after issue; (d) money market funds at least ninety-five percent (95%) of the assets of which
constitute  Cash  Equivalents  of  the  kinds  described  in  clauses  (a)  through  (c)  of  this  definition;  and  (e)  other  highly
rated  securities  as  detailed  in  Borrower’s  investment  policy  which  has  been  reviewed  and  approved  by  the  Bank  in
writing.”

2.4 Section 13 (Definitions). The following new term and its definition set forth below is inserted to appear alphabetically in

Section 13.1:

“ “Division” means, in reference to any Person which is an entity, the division of such Person into two (2) or more
separate  Persons,  with  the  dividing  Person  either  continuing  or  terminating  its  existence  as  part  of  such  division,
including, without limitation, as contemplated under Section 18-217 of the Delaware Limited Liability Company Act
for  limited  liability  companies  formed  under  Delaware  law,  or  any  analogous  action  taken  pursuant  to  any  other
applicable law with respect to any corporation, limited liability company, partnership or other entity.”

3. Limitation of Amendments.

3.1 The amendments set forth in Section 2 above are effective for the purposes set forth herein and shall be limited precisely as
written  and  shall  not  be  deemed  to  (a)  be  a  consent  to  any  amendment,  waiver  or  modification  of  any  other  term  or  condition  of  any  Loan
Document, or (b) otherwise prejudice any right or remedy which Bank may now have or may have in the future under or in connection with any
Loan Document.

3.2  This  Amendment  shall  be  construed  in  connection  with  and  as  part  of  the  Loan  Documents  and  all  terms,  conditions,
representations,  warranties,  covenants  and  agreements  set  forth  in  the  Loan  Documents,  except  as  herein  amended,  are  hereby  ratified  and
confirmed and shall remain in full force and effect.

4. Representations and Warranties. To induce Bank to enter into this Amendment, Borrower hereby represents and warrants to Bank
as follows:

4.1 Immediately after giving effect to this Amendment (a) the representations and warranties contained in the Loan Documents
are true and correct in all material respects as of the date hereof (except to the extent such representations and warranties relate to an earlier
date, in which case they are true and correct as of such date), and (b) no Event of Default has occurred and is continuing;

2

4.2 Borrower  has  the  power  and  authority  to  execute  and  deliver  this  Amendment  and  to  perform  its  obligations  under  the

Loan Agreement, as amended by this Amendment;

4.3 The organizational documents of Borrower delivered to Bank on the Effective Date remain true, accurate and complete and

have not been amended, supplemented or restated and are and continue to be in full force and effect;

4.4 The execution and delivery by Borrower of this Amendment and the performance by Borrower of its obligations under the

Loan Agreement, as amended by this Amendment, have been duly authorized by Borrower;

4.5 The execution and delivery by Borrower of this Amendment and the performance by Borrower of its obligations under the
Loan  Agreement,  as  amended  by  this  Amendment,  do  not  and  will  not  contravene  (a)  any  material  Requirement  of  Law,  (b)  any  material
contractual restriction with a Person binding on Borrower, (c) any material order, judgment or decree of any court or other governmental or
public body or authority, or subdivision thereof, binding on Borrower, or (d) the organizational documents of Borrower;

4.6 The execution and delivery by Borrower of this Amendment and the performance by Borrower of its obligations under the
Loan  Agreement,  as  amended  by  this  Amendment,  do  not  require  on  the  part  of  the  Borrower  any  order,  consent,  approval,  license,
authorization  or  validation  of,  or  filing,  recording  or  registration  with,  or  exemption  by  any  governmental  or  public  body  or  authority,  or
subdivision thereof, binding on Borrower, except as already has been obtained or made; and

4.7 This Amendment has been duly executed and delivered by Borrower and is the binding obligation of Borrower, enforceable
against  Borrower  in  accordance  with  its  terms,  except  as  such  enforceability  may  be  limited  by  bankruptcy,  insolvency,  reorganization,
liquidation, moratorium or other similar laws of general application and equitable principles relating to or affecting creditors’ rights (regardless
of whether enforcement is sought in equity or at law).

5. Ratification of Perfection Certificate. Borrower hereby ratifies, confirms and reaffirms, all and singular, the terms and disclosures
contained  in  that  certain  Perfection  Certificate  of  Borrower  dated  as  of  October  23,  2018  (the  “Perfection Certificate”)  and  acknowledges,
confirms and agrees that the disclosures and information Borrower provided to Bank in the Perfection Certificate have not changed, as of the
date hereof.

6. Integration. This Amendment and the Loan Documents represent the entire agreement about this subject matter and supersede prior
negotiations or agreements. All prior agreements, understandings, representations, warranties, and negotiations between the parties about the
subject matter of this Amendment and the Loan Documents merge into this Amendment and the Loan Documents.

7. Counterparts. This Amendment may be executed in any number of counterparts and all of such counterparts taken together shall be

deemed to constitute one and the same instrument.

8. Effectiveness. This Amendment shall be deemed effective upon (a) the due execution and delivery to Bank of this Amendment by

each party hereto and (b) Borrower’s payment to Bank of Bank’s legal fees and expenses incurred in connection with this Amendment.

[Signature page follows.]

3

4

IN  WITNESS  WHEREOF,  the  parties  hereto  have  caused  this  Amendment  to  be  duly  executed  and  delivered  as  of  the  date  first

written above.

BANK

BORROWER

SILICON VALLEY BANK

IRHYTHM TECHNOLOGIES, INC.

By:  __________________________
Name: ________________________
Title:  _________________________

By:  __________________________
Name: ________________________
Title:  _________________________

Signature Page to First Amendment to Third Amended and Restated Loan and Security Agreement

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We  hereby  consent  to  the  incorporation  by  reference  in  the  Registration  Statements  on  Form  S-8  (Nos.  333-233033,  333-223351,  333-214203  and  333-
217077) of iRhythm Technologies, Inc. of our report dated March 2, 2020 relating to the financial statements and the effectiveness of internal control over
financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

San Jose, California
March 2, 2020

CERTIFICATION PURSUANT TO
RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 31.1

I, Kevin M. King, certify that:

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K of iRhythm Technologies, Inc.;

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;

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;

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)

(b)

(c)

(d)

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;

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;

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

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)

(b)

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

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal
control over financial reporting.

Date: March 2, 2020

By:

/s/ Kevin M. King

Kevin M. King
President and Chief Executive Officer
(Principal Executive Officer)

CERTIFICATION PURSUANT TO
RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 31.2

I, Matthew C. Garrett, certify that:

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K of iRhythm Technologies, Inc.;

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;

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;

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)

(b)

(c)

(d)

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;

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;

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

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)

(b)

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

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal
control over financial reporting.

Date: March 2, 2020

By:

/s/ Matthew C. Garrett

Matthew C. Garrett
Chief Financial 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

In connection with the Annual Report of iRhythm Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2019 as
filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of
the Sarbanes-Oxley Act of 2002, that:

(1)

(2)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

The  information  contained  in  the  Report  fairly  presents,  in  all  material  respects,  the  financial  condition  and  result  of  operations  of  the
Company.

Date: March 2, 2020

By:

By:

/s/ Kevin M. King

Kevin M. King
President and Chief Executive Officer
(Principal Executive Officer)

/s/ Matthew C. Garrett

Matthew C. Garrett
Chief Financial Officer
(Principal Financial Officer and
Chief Accounting Officer)