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iRhythm

irtc · NASDAQ Healthcare
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FY2020 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, 2020
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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section
404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐
Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the 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, 2020, was approximately $3.1 billion.
The number of shares of Registrant’s Common Stock outstanding as of February 19, 2021 was 29,160,660.

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, 2020.

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

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

Item 15.

Exhibits, Financial Statement Schedules

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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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the impact of the COVID-19 pandemic on our operations and financial results;

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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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 three million patients and have collected over 750 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  5  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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Table of Contents

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;

a scalable digital platform that includes 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; and

a proprietary cloud-based digital information system, ZioSuite, that allows clinicians to connect via a web browser or mobile application
for convenient online report interpretation and streamlined clinical workflows.

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 three million patients have utilized the Zio service since its commercialization, and as of December 31, 2020, 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  in  the  United  States  and  international  markets  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 750 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, 2020, we had
1,157  full-time  employees.  Our  revenue  was  $265.2  million  and  $214.6  million  for  the  years  ended  December  31,  2020  and  2019,  respectively  and  we
incurred a net loss of $43.8 million and $54.6 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 ("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; and

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 three million patients have utilized the Zio service, and we have
collected over 750 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 750 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. 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.

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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.

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

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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.

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.

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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, physicians can access the additional
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 monitor 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); and

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

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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.

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.  Additionally,  the  Zio  service  can  be  ordered  directly  through  the  physicians’  electronic  health  record  system  through  the  use  of  iRhythm’s
Electronic Health Record ("EHR") integration service.

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.

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ZioSuite Web portal via desktop or mobile application

Up to 14-days continuous recording and storage

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

Preliminary findings
based on both the
proprietary algorithms
and certified cardiographic
technicians.
Final interpretation by
a patient’s physician.

Easy-to-read summary

Comprehensive symptom/rhythm correlation

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AF Burden

AF Duration

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.

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.

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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. During the year ended December 31, 2020, we made $4.0 million in milestone payments 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.

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:

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•

•

•

•

•

•

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’  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. In September 2020, we were named a winner of the Artificial Intelligence in Health and Care Award
run by the Accelerated Access Collaborate as part of the NHS AI Lab. This funding will bring the Zio service to selected NHS sites over
a 3-year program measuring clinical, pathway and economic outcomes. We also received positive guidance from the National Institute for
Health and Care Excellence ("NICE") in December 2020 for the adoption of the Zio XT service which may facilitate for future support of
the Zio service through the MedTech Funding Mandate. 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 200,000 annual procedures; and

post-transcatheter aortic valve patients, estimated to be 100,000 annual procedures

Advancing our product portfolio and core technology offering. We continue to invest in building a unique, innovative product portfolio
and digital platform that addresses unmet needs in the ambulatory cardiac monitoring market. We will continue to invest in research and
development efforts to further differentiate our biosensor, data analytics and reporting, information system and digital platform.

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

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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 AMA. For the year ended December 31, 2020, we received 84% 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.

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.

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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.

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.

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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. The one-year
results were published in Heart Rhythm O2 in December 2020. We interpreted the results to show that at one-year, AF was newly diagnosed in 6.6 percent
of patients who were actively monitored by the Zio service versus 2.4 percent in the observational control group receiving routine care. In addition to this
primary endpoint to evaluate the difference in new AF diagnoses, active monitoring in an asymptomatic, moderate-risk population with the Zio service was
associated with an increase in cardiology outpatient visits but also significantly lower rates of emergency department visits and hospitalizations over the
one year following monitoring. We concluded that these results suggest active monitoring with the Zio service can significantly reduce high-cost healthcare
resource  utilization  and  shift  toward  appropriate  care  settings  at  one  year.  The  three-year  results  were  presented  at  the  American  Heart  Association
Scientific Sessions during the Late Breaking Science session in November 2020. At the end of three years after the initial onset of monitoring:

•

•

•

•

AF was newly diagnosed in 11.4% of those actively monitored with the Zio service versus only 7.7% of the control group (a statistically
significant 48% improvement).

The trial found the incidence rate of a cardiac event (stroke, myocardial infarction, systemic embolism, or death) was 8.4 per 100 person-
years  in  people  diagnosed  with  AF  who  underwent  active  monitoring,  compared  to  the  control  group  incidence  rate  of  13.8  per  100
person-years (a statistically significant improvement). This data demonstrates the Zio service’s detection of AF in moderate-risk patients
supported the prevention of serious cardiac events after diagnosis.

Active  monitoring  with  the  Zio  service  also  led  to  fewer  hospitalizations  for  bleeding,  the  primary  safety  endpoint  for  the  study
(incidence rate of 0.32 per 100 person-years versus 0.71 per 100 person-years).

Active monitoring also led to fewer total hospitalizations (12.9 versus 18.9 per 100 person-years).

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We concluded the mSToPS study found that active screening for AF, as part of a prospective, pragmatic, direct-to-participant and nationwide study, was
associated with a significant improvement in clinical outcomes and safety at three years relative to routine care

An additional study 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. Initial results were presented at the combined European Stroke Organization / World Stroke Organization Conference in November
2020. This randomized control trial recruited 822 patients older than 75 years with hypertension and no known AF from 49 family practice clinics across
Canada and Germany between 2015 to 2019. The intervention group included 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. We interpreted the results to show AF was newly diagnosed in the screening
group in 5.3% of subjects at six months compared to 0.5% in the standard of care control group. A secondary outcome showed oral anticoagulation (OAC)
therapy was prescribed for 75% of participants who had screen-detected AF. We concluded that proactive screening and monitoring using the Zio service
could increase AF detection by 10-fold over standard of care potentially prompting anticoagulation use.

In  November  2019,  we  announced  our  participation  in  a  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.

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 $41.3 million, $37.3 million and $20.9 million for the years ended December 31, 2020, 2019 and
2018, respectively.

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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, 2020 we had 145 sales representatives
on  a  full-time  equivalent  basis,  compared  to  139  in  2019,  and  112  in  2018.  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. recently acquired by Royal Philips, Preventice
Solutions, Inc., being acquired by Boston Scientific, Inc. and Bardy Diagnostics, Inc., being acquired by Hill-Rom Holdings, Inc. offer ambulatory cardiac
monitoring services and also function as service providers. Recently, there has been increased acquisition activity and consolidation in our industry. 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.

These  competitors  have  also  developed  patch-based  cardiac  monitors  that  have  received  FDA  and  foreign  regulatory  clearances.  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.

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;

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.

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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, 2020 we owned, or retained an exclusive license to, twenty issued patents from the U.S. Patent Office, seven issued patents
from the Japanese Patent Office, two issued patents from the Australian Patent Office, four issued patents from the Canadian Patent Office, four issued
patents from the European Patent Offices, and two issued patents from the Korean Patent Office:

Country
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
USA
Japan
Japan
Japan
Japan
Japan
Japan
Japan
Australia
Australia
Canada
Canada
Canada
Canada

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
2/11/2020
6/2/2020
10/27/2020
2/22/2013
6/13/2014
9/1/2017
5/11/2018
3/8/2019
3/15/2019
9/18/2020
12/10/2015
6/29/2017
9/19/2017
8/18/2015
5/12/2020
6/9/2020

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
10,555,683
10,667,712
10,813,565
5,203,973
5,559,425
6,198,849
6,336,640
6,491,826
6,495,228
6,766,199
2,011,252,998
2,014,209,376
2,651,203
2,797,980
2,898,626
2,966,180

21

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
1/23/3034
10/30/2035
10/30/2035
2/6/2027
5/12/2031
1/23/2034
1/23/2034
5/12/2031
5/12/2031
5/12/2031
5/12/2031
1/23/2034
2/6/2027
5/12/2031
1/23/2034
10/30/2035

Table of Contents

Korea
Korea
Europe
Europe
Europe
Europe

10-1513288
10-2145450
1981402
2568878
2948050
3165161

4/13/2015
8/11/2020
8/10/2016
7/25/2018
5/12/2020
5/6/2020

5/12/2031
1/23/2034
2/6/2027
5/12/2031
1/23/2034
5/12/2031

As of December 31, 2020, we had nineteen pending patent applications globally, including eight in the United States, four in the European Patent

Office, three in Japan, and one in each of Australia, Korea, China and India.

As  of  December  31,  2020,  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.

Manufacturing and Supply

We  manufacture  our  ambulatory  cardiac  monitors,  Zio  XT  and  Zio  AT,  in  our  leased  facilities  in  Cypress,  California.  This  17,558  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 year, and plan to move into a new, larger facility in that time.

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,  Cal-Comp  USA,  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.

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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  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; and

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•

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:

•

•

•

•

•

•

European Union

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;

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; and

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, replaced 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.

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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 mitigate the risk of 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 privacy laws, such as the California Consumer Privacy Act ("CCPA") and
the  California  Privacy  Rights  Act  ("CPRA"),  that  apply  to  us.  The  compliance  requirements  of  these  laws,  including  additional  breach  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. These new legislative and regulatory developments may impact our privacy and security strategy and our web-based
and mobile assets.

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.

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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.

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.

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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.

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, such as the General Data Protection Regulation ("GDPR"), 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, or judicial rulings interpreting these laws, may impact our ability to obtain required patient information and therefore 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.

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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.

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 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.

Human Capital

Our human capital resources objectives include, as applicable, identifying, recruiting, retaining, incentivizing and integrating our existing and new
employees,  advisors  and  consultants  into  our  company.  The  principal  purposes  of  our  cash  and  equity  incentive  plans  are  to  attract,  retain  and  reward
personnel through the granting of cash-based and stock-based compensation awards, in order to increase stockholder value and the success of our company
by motivating such individuals to perform to the best of their abilities and achieve our short- and long-term business goals.

Diversity, Inclusion & equal opportunity

We  are  committed  to  providing  a  work  environment  that  is  free  of  discrimination  and  harassment.  We  are  an  equal-opportunity  employer.  We
make  employment  decisions  on  the  basis  of  a  person’s  qualifications,  and  our  business  needs.  We  believe  in  the  richness  and  quality  of  a  working
environment  that  is  informed  by  people  from  all  walks  of  life  and  strive  to  create  a  genuinely  inclusive  environment.  We  have  implemented  Diversity,
Equal opportunity, and Inclusion action planning teams focused on analysis from diversity surveys and focus groups. We have ongoing outreach efforts to
recruit a diverse candidate pool and are building questions into our engagement survey to promote a diverse and inclusive environment.

We are committed to ensuring our team members are treated with fairness and respect. We believe that a cooperative work environment, based in
trust and mutual respect, is essential to our success. We embrace the diversity of our workforce and celebrate the creative value added by individuals with
differing backgrounds and encourage employee resource groups such as our Women in iRhythm group which focuses on leadership for women within our
sales  organization.  We  expressly  prohibit  intimidation,  hostility,  harassment,  discrimination,  and  other  inappropriate  behavior.  Furthermore,  we  expect
associates to conduct themselves in a professional and dignified manner at all times; in doing so, we seek to avoid making associates feel

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uncomfortable at work. We are building tools for managers to promote inclusive development, promotion and retention strategies.

As new employees join us, they learn more about our policies and culture through orientation and onboarding, our Employee Handbook, Code of
Conduct, and compliance trainings. These all provide guidance on how we expect to operate in order to foster diversity, equity and inclusion across our
company.

Health, Safety, and Wellness

We are committed to maintaining a healthy, safe, and secure work environment that protects our employees and the public from harm. Most of our
employees  are  working  from  home  and  PPE  has  been  provided  to  all  employees  coming  into  the  office.  Where  feasible,  physical  distancing  has  been
implemented. We use a multi-faceted approach to ensure the health and safety of our employees, from our Code of Conduct to our policies governing the
way we act within and outside of our Company. We comply with applicable health, safety, and environmental laws as well as related company policies and
procedures. We have a zero-tolerance policy against aggressive behavior, violence, direct and indirect threats, harassment, intimidation, and possession of
weapons on company property. Moreover, we strive to conduct our everyday business activities in an environmentally sustainable way through wellness
programs, and webinars through our health insurance providers.

Total rewards

We offer an attractive mix of compensation and benefit plans to support our employees and their families’ physical, mental, and financial well-
being.  We  believe  that  we  employ  a  fair  and  merit-based  total  compensation  system  for  our  employees.  Employees  are  generally  eligible  for  medical,
dental, vision and other comprehensive benefits, most of which become effective on their start date. Below are some of the types of health and wellness
related benefits offered to employees:

• Medical, dental and vision insurance
• Retirement plan with Company matching contribution feature
• Flexible Spending Accounts for medical expenses, childcare, parking and transit
• Health Savings Account (with employer contribution)
• Life insurance
• Short & long-term disability
• Paid time off and leave of absences
• Employee assistance program

It is important that all employees have an opportunity to have an ownership interest in our company, and there are several programs that provide
the ability to own our stock. Generally, more than 75% of our employees participates in at least one of our stock programs. During their tenure with our
company, all employees have an opportunity to receive an equity award, either upon hire and/or during an annual review process to recognize those with
significant impact on achieving our goals. Another program offered to all employees, whether part or full time, is the ability to participate in our Employee
Stock  Purchase  Plan  (“ESPP”).  Participants  in  the  ESPP  may  purchase  our  stock  at  a  15%  discount  to  market  price.  We  believe  our  discounted  stock
purchase program helps to build an ownership mentality amongst participating employees.

Talent attraction and retention

As  we  recruit  top  talent  to  join  our  team,  we  use  job  boards  focused  on  outreach  to  underrepresented  communities,  including  ethnic  or  racial,

women, veterans, LGBTQIA, people with disabilities, and indigenous populations.

Workforce development
The growth and success of our employees is a top priority. We are investing heavily to build in-house tools and resources to support managers and

employees on the road to success and ongoing growth.

We offer a variety of training opportunities, whether focused on building vocational or management and leadership skills. Our sales and clinical
training  programs  equip  employees  to  perform  specialized  work  to  support  our  patients  and  customers.  Our  clinical  training  program  consists  of
approximately  80  hours  of  training  upon  hire,  plus  ongoing  training  opportunities  to  ensure  quality  and  consistency  standards  in  patient  care.  We  have
implemented  Linkedin  Learning  to  expand  options  for  skill  building  and  are  creating  a  grow  environment  by  asking  all  employees  to  have  personal
development plan.

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Our commercial program provides 40 hours of product training and ongoing field and classroom education to prepare employees to support our
customers with high quality service and support. Our management and leadership skill building in 2020 was focused on coaching and core-manager skills.
Despite the challenges of COVID-19 on our work location, we facilitated several online courses around our core competencies and coaching practices, and
we rolled out a toolbox on our intranet with tools for employees and managers across the employee lifecycle. We conducted an Employee Net Promoted
Score survey in 2019 and have ongoing surveys to engage employee feedback. We encourage employee service days and have donation matching programs
for company sponsored charities.

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

Summary of Risk Factors

Our business is subject to numerous risks and uncertainties that you should consider before investing in our company, as fully described below. The
principal factors and uncertainties that make investing in our company risky include, among others:

•

•

•

changes in public health insurance coverage and CMS reimbursement rates for the Zio service could affect the adoption and profitability of our
Zio service;

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;

the COVID-19 pandemic and efforts to reduce its spread have adversely impacted, and is expected to continue to materially and adversely impact,
our business and operations;

• 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;

•

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

• 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;

•

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;

• we have recently experienced management turnover, which creates uncertainties and could harm our business;

• 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; and

•

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

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Risks Related to Our Business

The COVID-19 pandemic and efforts to reduce its spread have adversely impacted, and is expected to continue to materially and adversely impact, our
business and operations.

The  COVID-19  pandemic  has  had,  and  is  expected  to  continue  to  have,  an  adverse  impact  on  our  operations,  particularly  as  a  result  of  preventive  and
precautionary  measures  that  we,  other  businesses,  and  governments  are  taking.  The  spread  of  COVID-19  in  the  United  States  has  resulted  in  travel
restrictions impacting our sales representatives and customer service team. Many hospitals have also limited access for non-patients, including our sales
professionals, which has negatively impacted our access to physicians and their patients. New hospital sanitization and social distancing protocols, as well
as increased competition for resources within hospitals that have dedicated certain resources to COVID patients, have impacted and may continue to impact
our  business  and  operations.  Additionally,  we  anticipate  that  an  increase  in  the  unemployment  rate  due  to  the  impact  of  COVID-19  will  decrease  the
number of potential patients with access to health insurance, which may result in fewer diagnostic procedures. As hospitals cancel and defer diagnostic and
elective procedures, it reduces their revenue and impacts their financial results, which could result in pricing pressure on our services as they seek cost
savings. Prolonged restrictions relating to COVID-19 could adversely affect our revenue, results of operations, cash flows, and financial position.

Although we saw recovery of patient registrations for the Zio service in the second half of 2020, we expect these challenges of the COVID-19 pandemic to
continue to impact the volume of Zio services provided for the duration of the pandemic, but its extent cannot be quantified at this time. Our customers’
patients are also experiencing the economic impact of the current pandemic. Even an important diagnostic procedure like the Zio service may be less of a
priority than other items for those patients who have lost their jobs, are furloughed, have reduced work hours or are worried about the continuation of their
medical  insurance.  Such  economic  effects  on  patients  may  delay  or  disrupt  our  ability  to  both  provision  our  service  and  collect  co-payments  or  out-of-
pocket costs, which would have an adverse effect on our revenue and cash flow. Patients may also be reluctant to visit their physicians or hospitals due to
fear of contracting COVID-19. Physicians are not performing as many diagnostic tests for their patients and the facilities where these tests are performed
may  not  be  open,  adequately  staffed  or  open  the  entire  day.  Even  where  physicians  continue  to  treat  symptomatic  patients,  treatment  of  asymptomatic
patients is being deferred in many cases. The reduction in diagnostic testing and physician visits, the increase in deferred treatment, and changes in patient
behaviors are translating into fewer Zio services being prescribed.

Governmental mandates related to the COVID-19 pandemic have impacted, and are expected to continue to impact, our personnel and personnel at third-
party manufacturing facilities in the United States and other countries, and the availability or cost of materials, which could disrupt our supply chain and
reduce margins. For instance, on or about March 16, 2020, the Health Officers of the counties of San Francisco (where our headquarters is located), Santa
Clara,  San  Mateo,  Marin,  Contra  Costa  and  Alameda,  where  many  of  our  employees  are  located,  issued  mandatory  shelter-in-place  orders  and  all
employees transitioned to a remote work environment. We are also subject to orders in Southern California that temporarily shut down our manufacturing
and distribution facilities in Cypress, California. For a limited number of employees who continue to support essential operations, including those at its
manufacturing facilities, we have instituted protective equipment policies and, to the degree practical, social distancing measures to protect the safety of our
employees.  While  we  have  continued  to  deliver  our  Zio  service  by  operating  with  remote  employees  and  essential  employees  on  site,  an  extended
implementation of these governmental mandates could further impact our ability to effectively provide our Zio service, and could impede progress of all
ongoing  initiatives.  Appropriate  social  distancing  techniques  and  other  measures  at  our  facilities  have  been  implemented  for  the  limited  number  of
employees who have returned to work to support essential operations, and will not return until the risk to employee health has meaningfully diminished.

While  we  expect  the  COVID-19  pandemic  to  impact  our  business  over  the  short  term  as  some  procedures  are  temporarily  deferred,  we  took  measures
intended to reduce business disruptions and preserve financial flexibility in the second quarter 2020. In assessing our own cash conservation options, we
took preemptive steps to curtail near-term spending, including eliminating or delaying spending on non-essential programs, reducing spend on travel and
consulting, implementing a hiring freeze, furloughing approximately 5% of our employees, conducting a layoff of approximately 2% of our employees and
implementing temporary pay reductions for our salaried workforce. Furthermore, our Chief Executive Officer, other named executive officers and other
senior  executives  agreed  to  base  salary  reductions  and  our  Board  of  Directors  agreed  to  a  reduction  in  its  fees  until  business  and  economic  conditions
improve. In August 2020, we reinstated furloughed employees, removed pay reductions for our salaried employees, and resumed hiring for most positions.
Our ongoing operations may be impacted as a result of employees assuming additional roles and responsibilities within our organization and we would
have  fewer  resources  available  to  run  our  operations,  which  could  negatively  impact  our  business  operations  and  revenue  as  a  result.  We  may  also
encounter voluntary departures of key employees due to any of the foregoing actions that we undertake. If key personnel or large groups of our employees
contract the virus, that may also impact our business and operations. For example, an outbreak in our manufacturing facility could cause us to have to shut
down our manufacturing operations, which would in turn present risk

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to the ongoing supply of devices required to continue our business operations. In the meantime, we have taken steps to support our employees, including
providing the ability for the majority of employees to work remotely and implementing policies to enhance employee safety, including appropriate social
distancing  techniques,  for  those  employees  required  to  work  in  our  facilities.  We  are  also  assessing  our  business  continuity  plans  in  the  context  of  this
pandemic.

Additionally, due to COVID-19, we have experienced delays in receiving Zio XT monitors back from patients, with some patients not returning the device
at all. As a result, the increased prevalence of COVID-19 could result in negative changes to historical expectations around device return timelines and loss
rates, both of which would negatively impact our finances. Finally, we anticipate that the COVID-19 pandemic may impact clinical and regulatory matters.
While we do not have any clinical trials currently in process, COVID-19 is delaying enrollment in new clinical trials across the medical device industry and
may affect any new trials we decide to pursue.

The potential effects of COVID-19 could also have the effect of heightening many of the other risks described in this “Risk Factors” section.

Any  of  these  occurrences  may  significantly  harm  our  business,  financial  condition,  cash  flows  and  prospects.  The  ultimate  impact  of  the  COVID-19
pandemic is highly uncertain and subject to change. This impact is having a material, adverse impact on our liquidity, capital resources, operations and
business and those of the third parties on which we rely, and could worsen over time. The extent to which the COVID-19 pandemic impacts our results will
depend on future developments, which are highly uncertain and cannot be predicted, including new information which may emerge concerning the severity
of COVID-19 and the actions to contain COVID-19 or treat its impact, among others. We do not yet know the full extent of potential delays or impacts on
our business, financial condition, cash flows and results of operations. Additionally, while the potential economic impact brought by, and the duration of,
the COVID-19 pandemic is difficult to assess or predict, the COVID-19 pandemic has resulted in, and may continue to result in, significant disruption of
global  financial  markets,  reducing  our  ability  to  raise  additional  capital,  which  could  negatively  impact  our  short-term  and  long-term  liquidity  and  our
ability to operate on a timely basis, or at all.

Unfavorable global economic conditions could adversely affect our business, financial condition or results of operations.

Our  results  of  operations  could  be  adversely  affected  by  general  conditions  in  the  global  economy  and  in  the  global  financial  markets.  The  COVID-19
pandemic has caused extreme volatility and disruptions in the global capital and credit markets. A severe or prolonged economic downturn, could result in
a variety of risks to our business, including driving hospitals to tighten budgets and curtail spending, which would negatively impact our sales and business.
In  addition,  higher  unemployment  or  reductions  in  employer-provided  benefits  plans  could  result  in  fewer  commercially  insured  patients,  which  could
negatively impact our revenue and business as a result. A weak or declining economy could also strain our third party manufacturers or suppliers, possibly
resulting in supply disruptions, or cause our customers to delay making payments for our Zio service. Any of the foregoing could harm our business and we
cannot anticipate all of the ways in which the economic climate and financial market conditions could adversely affect 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, 2020 and 2019, we had net losses of $43.8 million
and  $54.6  million,  respectively,  and  expect  to  continue  to  incur  additional  losses.  As  of  December  31,  2020,  we  had  an  accumulated  deficit  of  $304.7
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.

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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 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 our 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 at acceptable rates 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 impact of the COVID-19 outbreak on our operations and financial results;
the regulatory environment;
expenses associated with unforeseen product quality issues;
timing of physician prescriptions and demand for our Zio service;

•
•
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•
•
•
•

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•

•
•
•
•

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.

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, 2020, 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 and profitability of our Zio
service.

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 (“CPT”) code-set maintained by the American Medical Association
(“AMA”). For Zio XT, we had historically utilized temporary CPT codes (or Category III CPT codes), used for newly introduced technologies specific to
our category of diagnostic monitoring. 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 took effect on
January 1, 2021. In August 2020, CMS published the Calendar Year 2021 Medicare Physician Fee Schedule Proposed Rule which proposed reimbursement
for the Category I CPT codes that were higher than their associated Category III CPT codes. Following a comment period through October 2020, CMS
published its Calendar Year 2021 Medicare Physician Fee Schedule Final Rule (the “Final Rule”) in December 2020. In the Final Rule, CMS chose not to
finalize national pricing for four of the eight Category I CPT codes (93241, 93243, 93245 and 93247) which include the CPT codes that we will primarily
use to seek reimbursement for Zio XT.

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  (“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 a
specific  NCD,  as  is  the  case  with  Zio  XT  historically  and  for  Calendar  Year  2021  following  the  Final  Rule,  the  MAC  with  jurisdiction  over  a  specific
geographic region will have the discretion to make an LCD. We will be subject to LCD pricing until such time CMS establishes a NCD and we are seeking
to establish LCD pricing with one or more MACs to establish pricing for 2021. On January 29, 2021, Novitas Solutions, the MAC which covers the region
where our IDTF in Houston, Texas is located and where almost all of our Medicare services for Zio XT are processed, published rates for 2021 that were
significantly below our historical Medicare rates for Zio XT. We believe

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that the published rates by Novitas on January 29, 2021, are crosswalked from CPT codes 93224 and 93226, which are existing CPT codes for external
continuous  electrocardiographic  recording  up  to  48  hours,  while  the  Zio  service  is  capable  of  continuous  monitoring  for  up  to  14  days.  We  are  in  the
process of negotiating with Novitas to establish higher pricing for the Category I CPT Codes but can offer no assurances as to the timing or outcome of
those discussions. If the published rates by Novitas remain unchanged or are not significantly improved for the CPT codes listed above, thereby allowing us
to  obtain  adequate  Medicare  reimbursement  for  the  Zio  service  in  the  future,  we  may  be  unable  to  provide  the  Zio  XT  service  or  would  experience  a
significant loss of revenue, either of which would have a material adverse effect on our cash flows, results of operations, and financial condition.

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. 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 XT service. If published rates by Novitas are not increased to above the cost of revenue for the Zio service, and we are
unable to achieve a level of revenues adequate to support our cost structure, this would raise substantial doubts about our ability to continue as a going
concern.

We are currently holding a majority of Zio XT claims due to the CPT code transition. Claims are being held due to a combination of negotiations with
payors and administrative delays with payors. We expect the level of held claims to remain high through the end of the first quarter of 2021 and potentially
beyond. The high level of held claims will delay most first quarter 2021 cash flows into the second quarter of 2021 or potentially beyond, and may impact
the  timing  and  accounting  for  various  income  statement  items,  particularly  revenue  recognition  and  bad  debt  expense.  We  believe  we  have  adequate
balance sheet liquidity to manage through these delays in cash flow timing.

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

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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. In addition, 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 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.

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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,  manufacturing,  clinical,  customer  care  and  billing  operations  and  general  and  administrative
infrastructure.  In  addition  to  the  need  to  scale  our  operational  and  service  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, sell and support 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.

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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,

•

•

potentially involving significant capital expenditures;
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;
shelter-in-place orders in effect in California and elsewhere due to the COVID-19 outbreak;

•
• 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 2021, 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
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 and sub-assemblies 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, including those caused by pandemics such as
COVID-19;
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;
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.

•

•
•
•
•

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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  sub-assembly,  disposable  plastic  housings,  instruments  and  other  materials  that  we  use  to
manufacture and label our Zio monitors. These components and materials are critical and, in some cases, 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.

If our manufacturing facility becomes damaged or inoperable, or if we are required to vacate the facility, we may be unable to manufacture and ship
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, pandemic outbreaks, flooding and power outages.
Any of these may render it difficult or impossible for us to manufacture new products, ship assembled products, and/or 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, ship 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.

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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.

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  2020,  we  recognized  approximately  six  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

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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.

Our industry is 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. recently acquired by Royal Philips, Preventice Solutions, Inc., being acquired by Boston Scientific, Inc.
and  Bardy  Diagnostics,  Inc.,  being  acquired  by  Hill-Rom  Holdings,  Inc.  offer  ambulatory  cardiac  monitoring  services  and  also  function  as  service
providers. These companies have also developed other patch-based cardiac monitors that have received FDA and foreign regulatory clearances. There are
also several small start-up companies trying to compete in the patch-based cardiac monitoring space. 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.

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.has 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 and services that more directly compete with our Zio service. Recently, there has been increased of acquisition
activity and consolidation in our industry. 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.

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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  development  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 development 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 $4.0 million in milestone
payments during the year ended December 31, 2020 with an additional $4.0 million in milestone payments made in January of 2021. We 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 clear 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 cleared by the FDA, the developed products may not be accepted in the marketplace, and there is
no assurance that adequate reimbursement will be available.

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.

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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, 2020, we had $33.0 million outstanding under our term loan 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 have recently experienced management turnover, which creates uncertainties and could harm our business.

We have experienced significant changes in our executive leadership in the past twelve months. In December 2020, our Chief Executive Officer, Kevin M.
King, announced his retirement as our Chief Executive Officer, but will continue to serve on our Board of Directors. In June 2020, our Chief Financial
Officer, Matthew C. Garrett, announced that he was resigning for personal reasons and in March 2020, our Chief Operating Officer, Karim Kart, resigned.
Our current Chief Executive Officer, Michael Coyle, and Chief Financial Officer, Douglas J. Devine, were both external hires.

Changes to strategic or operating goals, which can often times occur with the appointment of new executives, can create uncertainty, may negatively impact
our ability to execute quickly and effectively, and may ultimately be unsuccessful. In addition, executive leadership transition periods are often difficult as
the  new  executives  gain  detailed  knowledge  of  our  operations,  and  friction  can  result  from  changes  in  strategy  and  management  style.  Management
turnover inherently causes some loss of institutional knowledge, which can negatively affect strategy and execution. If we do not integrate new executives
successfully, we may be unable to manage and grow our business, and our financial condition and profitability may suffer as a result. In addition, to the
extent we experience additional management turnover, competition for top management is high and it may take months to find a candidate that meets our
requirements. If we are unable to attract and retain qualified management personnel, our business could suffer.

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 Michael J. Coyle, our Chief Executive Officer, and Douglas J. Devine, 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.

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

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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,

•
•
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•
•
•

•

•

•

regulatory 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.

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

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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,  operational  and  funding  reductions  negatively  impacting  USPS  service  capabilities,  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.

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

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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. We have in the
past been subject to cyber-attacks and data breaches and expect that we will be subject to additional cyber-attacks in the future and may experience future
data breaches. 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 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 or 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.
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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,  or  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 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, 2020, we had federal and state net operating loss carryforwards (“NOLs”) of $368.2 million and $218.7 million, respectively, which if
not  utilized  will  begin  to  expire  in  2027  for  federal  purposes  and  began  expiring  in  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, 2020, a Section 382 study is in the process of being 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 have taxable income, rather than losses, than 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 in Item 9A of our Annual Reports on Form 10-K for the years ended December 31, 2018 and December 31, 2019, filed with
the SEC on March 4, 2019 and March 2, 2020, respectively, 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).

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To implement remedial measures as disclosed in Item 9A of our Annual Reports on Form 10-K for the years ended December 31, 2018 and December 31,
2019,  filed  with  the  SEC  on  March  4,  2019  and  March  2,  2020,  respectively,  we  committed  additional  resources,  hired  additional  staff,  and  provided
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 the material
weakness that continues to exist and if we are unable to produce accurate and timely financial statements, our stock price may be adversely affected.

Furthermore, we were late in filing our Quarterly Report on Form 10-Q for the quarter ended September 30, 2019 due to errors that we identified affecting
prior periods in our financial reports.

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 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 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, a scenario that could also
result in the invalidation of our asserted patents, and the damages or other remedies awarded, if any, may not be commercially meaningful. We may not be
able

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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, 2020, we owned, or retained exclusive license to, twenty issued U.S. patents, the earliest of which will
expire in 2028. As of December 31, 2020, we also owned, or retained an exclusive license to, seven issued patents from the Japanese Patent Office, two
issued patents from the Australian Patent Office, four issued patents from the Canadian Patent Office, four issued patents from the European Patent Office,
and two issued patents from the Korean Patent Office. The earliest expiration date of these international patents is 2027. As of December 31, 2020, we had
nineteen pending patent applications globally, including eight in the United States, four in the European Patent Office, three in Japan, and one in each of
Australia, Korea, 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.

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

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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 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.

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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  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. For example, on January 29, 2021,  Novitas
Solutions, a Medicare Administrative Contractor that we, physicians and hospitals rely on to process Medicare reimbursement claims related to our Zio
service recently published reimbursement rates that were considerably lower than those than expected. 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.

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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
Act including mandatory treble damages and significant per-claim penalties, which were increased to $11,665 to $23,331 per false claim in 2020.

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

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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 and
in the UK. 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 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.

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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; and
•

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 2021, after which time compliance with the 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 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

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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 May 2020 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 2021. 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. 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, 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.

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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. On December 24, 2020, the U.K. and E.U. agreed to a trade deal (the
“Trade and Cooperation Agreement”) which was ratified by the U.K. on December 30, 2020. The Trade and Cooperation Agreement is subject to formal
approval by the European Parliament and the Council of the European Union before it comes into effect and has been applied provisionally since January 1,
2021. There are still a number of areas of uncertainty in connection with the future of the U.K. and its relationship with the E.U. and the application and
interpretation  of  the  Trade  and  Cooperation  Agreement,  and  Brexit  related  matters  may  take  several  years  to  be  clarified  and  resolved.  For  example,
because a significant proportion of the regulatory framework in the U.K. is currently derived from E.U. directives and regulations, Brexit could result in
material changes to the regulatory regime applicable to many of our current operations. Although the Trade and Cooperation Agreement offers U.K. and
E.U. companies preferential access to each other’s markets, ensuring imported goods will be free of tariffs and quotas, economic relations between the U.K.
and  the  E.U.  will  now  be  on  more  restricted  terms  than  existed  previously.  Therefore,  at  this  time,  we  cannot  predict  the  impact  that  the  Trade  and
Cooperation Agreement and any future agreements contemplated under the terms of the Trade and Cooperation Agreement will have on our future business
efforts to commercialize our Zio service in the U.K. and E.U. Accordingly, it is possible that new terms of the Trade and Cooperation Agreement may
adversely  affect  our  operations  and  financial  results.  We  are  currently  in  the  process  of  evaluating  our  own  risks  and  uncertainties  to  ascertain  what
financial, trade, regulatory and legal implications the Trade and Cooperation Agreement could have on our operations in the U.K. and otherwise. Finally,
uncertainty  surrounding  Brexit  has  contributed  to  recent  fluctuations  in  the  U.K.  economy  as  a  whole  which  could  experience  future  disruptions.  As  a
result, Brexit could cause financial and capital markets within and outside the U.K. or the E.U. to constrict, thereby negatively impacting our ability to
finance our U. K. operations which could also have an adverse effect on our results of operations and financial condition.

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 continue to 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;
the impact or anticipated impact of the COVID-19 pandemic on us;
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 coverage and rates 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 affecting 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.

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 if they issue adverse or misleading opinions regarding our
stock, our stock price and trading volume could decline.

The  trading  market  for  our  common  stock  will  be  influenced  by  the  research  and  reports  that  industry  or  securities  analysts  publish  about  us  or  our
business. If any of the analysts who cover us issue an adverse or misleading opinion regarding us, our business model, our intellectual property or our stock
performance, or if our target studies and operating results fail to meet the expectations of analysts, our stock price would likely decline. If one or more of
these analysts cease coverage of us or fail to publish reports on us regularly, we could lose visibility in the financial markets, which in turn could cause our
stock 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 management effort toward ensuring compliance with the requirements of Section 404, which has increased now that we will no

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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 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  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.

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Our  amended  and  restated  certificate  of  incorporation  and  bylaws  provide  that  the  Court  of  Chancery  of  the  State  of  Delaware  (or,  if  the  Court  of
Chancery  does  not  have  jurisdiction,  another  State  court  in  Delaware  or  the  federal  district  court  for  the  District  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  and  bylaws  provide  that,  unless  we  consent  to  the  selection  of  an  alternative  forum,  the  Court  of
Chancery of the State of Delaware (or, if the Court of Chancery does not have jurisdiction, another State court in Delaware or the federal district court for
the District 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 against
the company or any director or officer of the company arising pursuant to the Delaware General Corporation Law, 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 against us governed by the internal affairs doctrine, in each such case subject to said Court of Chancery having
personal  jurisdiction  over  the  indispensable  parties  named  as  defendants  therein.  This  provision  would  not  apply  to  suits  brought  to  enforce  a  duty  or
liability  created  by  the  Exchange  Act  or  any  other  claim  for  which  the  U.S.  federal  courts  have  exclusive  jurisdiction.  Our  investors  cannot  waive
compliance with the federal securities laws and the rules and regulations thereunder. Our bylaws further provide that the federal district courts of the United
States will be the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act. The enforceability of similar
exclusive  federal  forum  provisions  in  other  companies’  organizational  documents  has  been  challenged  in  legal  proceedings,  and  while  the  Delaware
Supreme Court has ruled that this type of exclusive federal forum provision is facially valid under Delaware law, there is uncertainty as to whether other
courts would enforce such provisions. 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 or
bylaws 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 dividends and do not anticipate paying 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 agreement with Silicon
Valley Bank limits our ability to, among other things, pay dividends or make other distributions or payments on account of our common stock, 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  our  stock  price
appreciates and you sell our common stock thereafter.

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 17,558 square feet for our manufacturing and distribution facilities in Cypress, California under an agreement that expires in September

2022.

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

Item 3. Legal Proceedings.

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From time to time, we are involved in claims and legal proceedings or investigations, that arise in the ordinary course of business. Such matters
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. These matters are subject to many uncertainties and outcomes that are not predictable.

On February 1, 2021, a putative class action lawsuit was filed in the United States District Court for the Northern District of California alleging that the
Company and our former chief executive officer violated Sections 10(b) and 20(a) of the Exchange Act and SEC Rule 10b-5 promulgated thereunder. The
purported  class  includes  all  persons  who  purchased  or  acquired  our  securities  between  August  4,  2020  and  January  28,  2021.  The  complaint  seeks
unspecified damages purportedly sustained by the class. The Company believes the complaint to be without merit and plans to vigorously defend itself.

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

2020

2019

High

Low

High

Low

$
$
$
$

101.40  $
131.18  $
238.11  $
261.17  $

57.79  $
72.13  $
111.60  $
180.80  $

97.34  $
80.48  $
83.77  $
72.97  $

65.44 
66.64 
68.59 
61.00 

As of February 19, 2021 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,  2020  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.

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iRhythm Technologies, Inc.
NASDAQ Composite
NASDAQ Biotechnology

$
$
$

100  $
100  $
100  $

115  $
103  $
98  $

215  $
132  $
119  $

267  $
127  $
108  $

261  $
171  $
134  $

911 
246 
168 

10/20/2016

12/31/2016

12/31/2017

12/31/2018

12/31/2019

12/31/2020

Issuer Purchases of Equity Securities

None

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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, 2020,
2019,  and  2018,  and  the  balance  sheet  data  at  December  31,  2020,  and  2019  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, 2017 and 2016 and the balance sheet
data  at  December  31,  2018,  2017,  and  2016  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
Gross profit
Operating expenses:

(2)

Research and development
Selling, general and administrative

(2)

(2)

Total operating expense

(2)

Loss from operations
Interest expense
Other income (expense), net
Loss on extinguishment of debt
Loss before income taxes
Income tax provision
Net loss

(1)

(1)

Net loss per common share, basic and diluted

Weighted-average shares, basic and diluted

2020

265,166  $
70,277 
194,889 

41,329 
197,233 
238,562 
(43,673)
(1,519)
1,591 
— 
(43,601)
229 
(43,830) $

(1.58) $

$

$

$

Year Ended December 31,
(in thousands, except share and per share data)
2018

2017

2019

214,552  $
52,485 
162,067 

37,299 
179,523 
216,822 
(54,755)
(1,643)
1,895 
— 
(54,503)
65 
(54,568) $

(2.16) $

147,277  $
38,795 
108,482 

20,860 
133,313 
154,173 
(45,691)
(3,115)
1,501 
(3,029)
(50,334)
44 
(50,378) $

(2.11) $

99,129  $
28,203 
70,926 

13,265 
85,252 
98,517 
(27,591)
(3,386)
1,237 
— 
(29,740)
— 
(29,740) $

(1.31) $

2016

(1)

64,551 
20,891 
43,660 

7,218 
51,916 
59,134 
(15,474)
(3,248)
(2,073)
— 
(20,795)
— 
(20,795)

(3.93)

27,754,404 

25,265,918 

23,885,858 

22,627,327 

5,285,847 

(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. The revision for the year ended December 31, 2017, which consolidated financial
statements  are  not  included  within  this  Annual  Report  on  Form  10-K,  resulted  in  an  increase  in  revenue  by  $0.6  million,  increase  in  cost  of
revenue  by  $0.5  million,  decrease  in  research  and  development  expense  by  $0.1  million  and  an  increase  in  selling,  general  and  administrative
expense by $0.5 million, resulting in net loss being decreased by $0.3 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

2020

2019

Year Ended December 31,
2018

2017

(1)

2016

(1)

$

$

27  $

7,727 
33,761 
41,515  $

658  $

4,462 
21,121 
26,241  $

193  $

3,057 
13,079 
16,329  $

589  $

1,619 
7,544 
9,752  $

25 
271 
1,946 
2,242 

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Table of Contents

Consolidated Balance Sheets Data:
Cash and cash equivalents
Working capital
Total assets
Operating lease liabilities, noncurrent portion
Notes payable
Accumulated deficit
Total stockholders' equity

2020

2019

As of December 31,
2018

2017

(1)

2016

(1)

$

$

88,628  $
312,160 
511,739 
81,293 
33,006 
(304,684)
341,612  $

20,462  $
120,726 
306,212 
85,748 
34,933 
(260,393)
135,409  $

20,023  $
73,961 
117,523 
— 
34,899 
(205,825)

52,137  $

8,671  $

98,376 
133,379 
— 
33,978 
(156,801)

79,341  $

51,643 
105,872 
138,635 
— 
32,227 
(127,061)
93,041 

(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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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; and

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 51%, 47% and 39% of our revenue for the years ended
December 31, 2020, 2019 and 2018, respectively. Approximately 27%, 27% and 27% of our total revenue for the years ended December 31, 2020, 2019
and  2018,  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 16%, 20% and 25% of our revenue for the
years ended December 31, 2020, 2019, and 2018 respectively. Non-contracted third-party payors and self-pay accounted for 6%, 5%, and 8% of our total
revenue  for  the  years  ended  December  31,  2020,  2019,  and  2018,  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 three million
patients and have collected over 750 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 service 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. In addition, we will continue exploring sales and marketing expansion
opportunities in international geographies.

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COVID-19 Impact

We cannot currently predict the extent or duration of the ongoing impact to our financial results and have suspended forward-looking guidance.
Although we cannot currently predict the extent or duration of the COVID-19 related impact to our financial results, we expect the impact of COVID-19 to
be more significant in the near-term.

Beginning in mid-March 2020, we experienced decreasing levels in the Zio service patient registrations which impacted our revenues for the year ended
December 31, 2020. This decrease in revenue is due to a variety of challenges associated with the COVID-19 pandemic in the United States, including,
among others:

•

•

•

•

•

reduction in physician prescriptions for our Zio service due to:

◦

◦
◦
◦
◦

directives  from  the  Centers  for  Disease  Control  and  Prevention,  CMS,  various  medical  societies  and  other  entities  that  suggested
cancelling or deferring elective, non-essential procedures;
a reduction in diagnostic testing outside of those tests related to severe respiratory distress;
closure or reduction in the hours of most physicians’ offices;
physicians and hospitals prioritizing the treatment of critically ill patients; and
patient reluctance to visit physicians or hospitals for fear of contracting COVID-19;

cancellation and reduction of physician attendance at professional medical society meetings and trade shows and our decision not to attend them;

travel  restrictions  and  changing  hospital  policies  that  have  limited  access  of  our  sales  professionals  to  hospitals  where  the  Zio  services  are
prescribed and where patients have historically been enrolled;

delays in receiving Zio XT back from patients with some patients not returning the device at all; and

patients who have lost jobs, been furloughed, have reduced work hours or are worried about the continuation of medical insurance being unable to
afford the Zio service.

During the second half of fiscal year 2020, we saw recovery of patient registrations for the Zio service to pre-COVID levels of the first quarter of 2020.
However, it is expected that the challenges of the COVID-19 pandemic will potentially impact the number of patients who register for the Zio service for
some period of time depending on the rate at which the number of COVID-19 cases increases or declines and the economy recovers.

We are taking a variety of measures to promote the safety and security of our employees and customers. Our response to COVID-19 is focused on:

•

Protecting and supporting the health and well-being of our employees, our communities and our customers by limiting the transmission of
COVID-19. Following recommendations from federal and local government and healthcare agencies, we transitioned employees to a remote work
environment beginning in early March 2020. For a small number of our employees who continue to support essential operations at our facilities,
we  have  instituted  social  distancing  and  other  measures  to  ensure  the  safety  of  our  employees.  We  rapidly  implemented  business  continuity
protocols  and  have  been  able  to  transition  to  a  remote  operating  environment  while  continuing  to  deliver  our  Zio  service.  We  will  continue  to
follow local and national guidelines to determine the appropriate time to resume in-office functions.

• Delivering  uninterrupted  patient  care  for  both  Zio  XT  and  Zio  AT  and  supporting  efforts  to  monitor  COVID-19  patients.  While  hospital
systems and healthcare facilities shift their focus and resources to treating COVID-19 patients and combating the spread of COVID-19, we have
adapted our service to meet the immediate needs of our physician customers and patients. Our digital service platform enables physician ordering,
results  reporting,  data  curation  and  patient  support  independent  of  location,  across  virtual  or  in-office  care  models.  As  an  example,  we  have
significantly  increased  the  utilization  of  our  “Home  Enrollment”  service.  This  service  allows  patients  to  receive  and  wear  the  single-use  Zio
monitor without going to a healthcare facility. Physicians can prescribe the Zio service for their patients, either in-office or through a virtual care
setting, and we ship the Zio monitor directly to the patient’s residence. We pay for

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the costs of shipping the Zio monitor, which represents additional expense for us. We also guide patients through the patch application process and
inform  them  of  instructions  for  wear.  Home  enrollment  also  eliminates  clinical  staff  exposure  to  patients,  as  well  as  application,  cleaning  or
reusing traditional Holter and event monitors that may have been exposed to viruses or other pathogens. In addition, health systems with acute
needs to facilitate a reduction in healthcare provider contact or for additional monitoring capacity can deploy Zio AT for in-patient monitoring.
The FDA informed us that Zio AT usage for this application is consistent with the FDA COVID-19 Remote Monitoring guidance.

• Adjusting our operating plan as appropriate to ensure continued financial strength. We continue to maintain a strong cash position and have
taken initiatives to adjust our operating plan to ensure we maintain appropriate liquidity during these uncertain times. We have proactively taken
steps to reduce spend, including eliminating or delaying project spend for non-essential programs, and reducing spend on travel and consulting. In
addition, we raised $206.8 million in proceeds from a follow-on public offering in August 2020 to fund growth initiatives and for working capital
and other general corporate purposes.

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, 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  the  Company,  historical  amount  received  for  the  service,  and  any
current developments or changes that could impact reimbursement and healthcare institution payments.

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.  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 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.  Gross  margin  for  year  ended  December  31,  2020  was  negatively  impacted  due  to  the
COVID-19 pandemic and absorption of fixed costs. We expect this impact to continue in the near term.

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.

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Table of Contents

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.

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 patient claims processing fees and travel expenses.

Interest Expense

Interest expense is attributable to borrowings under our loan agreements. Refer to Note 7. Debt, for further information on our loan agreements.

Other Income, 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, 2020, and 2019

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 before income taxes
Income tax provision

Net loss

Revenue

Years Ended December 31,

2020

2019

$ Change

% Change

$

$

(dollars in thousands)

$

265,166 
70,277 
194,889 

$

214,552 
52,485 
162,067 

73 %

76 %

41,329 
197,233 
238,562 
(43,673)
(1,519)
1,591 
(43,601)
229 
(43,830)

$

37,299 
179,523 
216,822 
(54,755)
(1,643)
1,895 
(54,503)
65 
(54,568)

$

50,614 
17,792 
32,822 

4,030 
17,710 
21,740 
11,082 
124 
(304)
10,902 
164 
10,738 

24 %
34 %
20 %

11 %
10 %
10 %
20 %
8 %
16 %
20 %
252 %
20 %

Revenue increased $50.6 million, or 24%, to $265.2 million during the year ended December 31, 2020 from $214.6 million during the year ended
December 31, 2019. The increase in revenue was primarily attributable to the increase in volume of the Zio services as a result of increased in demand from
our customers.

Cost of Revenue and Gross Margin

Cost of revenue increased $17.8 million, or 34%, to $70.3 million during the year ended December 31, 2020 from $52.5 million during the year
ended December 31, 2019. The increase in cost of revenue was primarily due to increased Zio service volume and costs incurred to support a larger cost
structure in 2020.

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Table of Contents

Gross margin for the year ended December 31, 2020 decreased to 73%, compared to 76% for the year ended December 31, 2019. The decrease in

gross margin was primarily driven by product mix, as well as fixed costs that we continue to incur, partially offset by increased volume.

Research and Development Expenses

Research  and  development  expenses  increased  $4.0  million,  or  11%,  to  $41.3  million  during  the  year  ended  December  31,  2020  from  $37.3
million during the year ended December 31, 2019. The increase was primarily attributable to a $8.3 million increase in payroll and employee stock-based
compensation as a result of increased headcount and an increase of $1.0 million Verily milestone expense. This was partially offset by $4.7 million increase
in capitalization of internal use software.

Selling, General and Administrative Expenses

Selling, general and administrative expenses increased $17.7 million, or 10%, to $197.2 million during the year ended December 31, 2020 from
$179.5  million  during  the  year  ended  December  31,  2019.  The  increase  was  primarily  attributable  to  a  $29.5  million  increase  in  payroll  and  employee
stock-based compensation as a result of increased headcount to support the growth in our operations, a $2.9 million increase in facilities and rent due to
expansion of the San Francisco headquarters and increased facility related costs, partially offset by decrease of $8.9 million in travel, entertainment and
office meals as a result of the COVID-19 pandemic and a decrease of $4.4 million in professional services fees.

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  $0.1  million  to  $1.5  million  during  the  year  ended  December  31,  2020  from  $1.6  million  during  the  year  ended

December 31, 2019 due to principal re-payments on SVB Loan starting in November 2020 and decrease in interest rate in 2020.

Other Income, Net

Other  income,  decreased  $0.3  million  to  $1.6  million  for  the  year  ended  December  31,  2020,  compared  to  $1.9  million  for  year  ended
December  31,  2019.  The  decrease  in  other  income  is  primarily  due  to  a  decrease  in  amortization  of  investments,  partially  offset  by  increase  in  interest
income, and prior year value added tax reclaims.

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Comparison of the Year 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

(dollars in thousands)

$

214,552 
52,485 
162,067 

$

147,277 
38,795 
108,482 

76 %

74 %

37,299 
179,523 
216,822 
(54,755)
(1,643)
1,895 
— 
(54,503)
65 
(54,568)

$

20,860 
133,313 
154,173 
(45,691)
(3,115)
1,501 
(3,029)
(50,334)
44 
(50,378)

67,275 
13,690 
53,585 

16,439 
46,210 
62,649 
(9,064)
1,472 
394 
3,029 
(4,169)
21 
(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 primarily attributable to the increase in volume of the Zio services as a result of increased in demand from
our customers.

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 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 in Verily milestone and upfront payment expense, and $3.3 million for allocated facility-related
expenses. This was partially offset by $3.3 million increase in capitalization of internal use software.

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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 the 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.

Liquidity and Capital Expenditures

Overview

We are continuously reviewing our liquidity and anticipated capital requirements in light of the significant uncertainty created by the COVID-19

global pandemic. We believe we will have adequate liquidity over the next twelve months to operate our business and to meet our cash requirements.

As  of  December  31,  2020,  we  had  cash  and  cash  equivalents  of  $88.6  million,  short-term  investments  of  $246.6  million,  and  an  accumulated

deficit of $304.7 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 in cash, cash equivalents, and restricted cash

Cash Used in Operating Activities

2020

Year Ended December 31,
2019

2018

$

$

(13,759) $

(132,391)
214,316 
68,166  $

(21,863) $
(89,274)
111,576 

439  $

(29,093)
34,142 
6,303 
11,352 

During  the  year  ended  December  31,  2020,  cash  used  in  operating  activities  was  $13.8  million  which  consisted  of  a  net  loss  of  $43.8  million,
adjusted  by  non-cash  charges  of  $86.3  million  and  a  net  change  of  $56.2  million  in  our  net  operating  assets  and  liabilities.  The  non-cash  charges  are
primarily comprised of stock-based compensation expense of $41.5 million, as well as depreciation and amortization expense of $6.9 million and a change
in allowance for doubtful accounts and contractual

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allowance  of  $31.4  million  and  amortization  of  right  of  use  assets  of  $6.0  million.  The  change  in  our  net  operating  assets  and  liabilities  compared  to
December 31, 2019 was primarily due to an increase of $38.0 million in the change in accounts receivable as a result of the increase in our revenue, an
increase  of  $6.1  million  in  other  assets,  primarily  related  to  increase  in  PCBA  boards  due  to  increased  customer  demand  and  sales,  a  decrease  of  $4.8
million in operating lease liability and a decrease of $3.9 million in accounts payable.

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 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.

Cash From Investing Activities

Cash used in investing activities during the year ended December 31, 2020 was $132.4 million, which consisted primarily of $277.5 million in
purchases of available for sale investments, $13.6 million of capital expenditures to purchase property and equipment and $1.9 million in repayment of
long-term debt, partially offset by $144.1 million cash received from the maturities of available for sale investments and $14.5 million in cash received
from sales of available for sale investments.

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 From Financing Activities

During the year ended December 31, 2020, cash provided by financing activities was $214.3 million, primarily due to $206.0 million from the
issuance of common stock in a public offering, net of discounts and issuance costs and $20.2 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 $10.0 million in tax withholding upon
the vesting of RSUs and $1.9 million in re-payment of long term debt.

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.

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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.

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 could borrow up to 80% of our eligible accounts receivable, up to the maximum of $15.0 million.

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 made 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,  2020  we  were  eligible  to  borrow  up  to  $7.7  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, 2020. The obligations under the
Third Amended and Restated Loan Agreement are collateralized by substantially all of our assets.

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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 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

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.

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•

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  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”), and market condition awards 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. We estimate the

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grant date fair value, and the resulting stock-based compensation expense for market condition awards using the Monte-Carlo 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 and Monte-Carlo option-pricing models, 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. The expected volatility is derived from the average implied volatility of our common stock. As our common stock
has been publicly traded for a limited time, in some cases 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 and Monte-Carlo 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.

We recognize compensation expense related to RSUs 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).  Where  there  is  a  minimum  performance  condition
required to vest in RSUs, we perform a probability assessment to estimate the number of shares that are probable to vest.

We recognize compensation expense related to the Employee Stock Purchase Program (“ESPP”) based on the estimated fair value 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 $41.5 million, $26.2 million, and $16.3 million for the years ended December 31, 2020, 2019
and 2018, 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 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  adopted  ASC  326  on  January  1,  2020,  using  the  modified  retrospective  transition  method  through  a  non-cash  $0.5  million
cumulative-effect  increase  to  accumulated  deficit  and  the  allowance  for  doubtful  accounts.  The  Company  considered  the  current  and  expected  future
economic and market conditions surrounding the novel COVID-19 pandemic and recorded additional reserves that were not individually material to the
estimate. Actual results may differ from these estimates.

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

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requires  customers  to  expense  the  capitalized  implementation  costs  of  a  hosting  arrangement  that  is  a  service  contract  over  the  term  of  the  hosting
arrangement.  The  Company  adopted  ASU  No.  2018-15  on  January  1,  2020,  using  the  prospective  transition  method.  The  impact  of  adoption  on  the
Company's consolidated financial statements was not material.

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. The Company elected to early adopt
ASU 2019-12 effective as of January 1, 2020, and the impact of adoption on the Company's condensed consolidated financial statements was not material.

Off-Balance Sheet Arrangements

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

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

$
$
$
$

1,194  $
11,666  $
9,513  $
22,373  $

883  $
21,389  $
23,214  $
45,486  $

—  $
—  $
24,389  $
24,389  $

—  $
—  $
75,420  $
75,420  $

Total

2,077 
33,055 
132,536 
167,668 

________________________________
(1)

Debt interest payments calculated based on interest rates in effect as of December 31, 2020

The  table  above  does  not  include  approximately  $4.4  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 $2.3 million as of December 31, 2020 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 $335.2 million as of December 31, 2020; 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, 2020 and 2019 we had total outstanding debt of $33.0 million and $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,  2020,  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.

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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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84
85
86
87
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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,
2020 and 2019, 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, 2020, 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,  2020,  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, 2020 and 2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020 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, 2020, based on criteria established in Internal Control - Integrated
Framework  (2013)  issued  by  the  COSO  because  a  material  weakness  in  internal  control  over  financial  reporting  existed  as  of  that  date  related  to  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.

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  weakness
referred to above is described in Management’s Annual Report on Internal Control Over Financial Reporting appearing under Item 9A. We considered this
material weakness in determining the nature, timing, and extent of audit tests applied in our audit of the 2020 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 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.

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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,  2020,  the  Company’s  contractual  allowance  balance  was  $21.3  million  and
allowance for doubtful accounts balance was $12.7 million, a 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 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 the 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, relating to management’s
judgments regarding the historical period used on which to base the estimate. As disclosed by management, a material weakness existed during the year
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. These 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) testing management’s process for developing the estimate on the data on which it
is based.

/s/ PricewaterhouseCoopers LLP
San Jose, California

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February 26, 2021

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

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Assets
Current assets:

IRHYTHM TECHNOLOGIES, INC.

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

Cash and cash equivalents
Short-term investments
Accounts receivable, net of allowances for doubtful accounts of $12,711 and $9,049 as of December 31, 2020
and December 31, 2019, respectively
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
Operating lease liabilities, current portion

Total current liabilities

Debt, noncurrent portion
Other noncurrent liabilities
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, 2020 and 2019; and none issued

and outstanding at December 31, 2020 and 2019, respectively

Common stock, $0.001 par value – 100,000,000 shares authorized at December 31, 2020 and 2019; 29,019,350

and 26,682,720 shares issued and outstanding at December 31, 2020 and 2019, respectively

Additional paid-in capital
Accumulated other comprehensive income
Accumulated deficit
Total stockholders’ equity

Total liabilities and stockholders’ equity

December 31,

2020

2019

88,628  $
246,589 

29,932 
5,313 
7,363 
377,825 
— 
34,247 
84,714 
862 
14,091 
511,739  $

4,365  $

40,532 
930 
11,667 
8,171 
65,665 
21,339 
1,830 
81,293 
170,127 

20,462 
120,089 

23,867 
4,037 
4,337 
172,792 
8,030 
26,464 
90,124 
862 
7,940 
306,212 

8,243 
32,714 
1,251 
1,944 
7,914 
52,066 
32,989 
— 
85,748 
170,803 

— 

— 

27 
646,258 
11 
(304,684)
341,612 
511,739  $

25 
395,695 
82 
(260,393)
135,409 
306,212 

$

$

$

$

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)

2020

Year Ended December 31,
2019

2018

$

$

$

265,166  $
70,277 
194,889 

41,329 
197,233 
238,562 
(43,673)
(1,519)
1,591 
— 
(43,601)
229 
(43,830) $

(1.58) $

214,552  $
52,485 
162,067 

37,299 
179,523 
216,822 
(54,755)
(1,643)
1,895 
— 
(54,503)
65 
(54,568) $

(2.16) $

147,277 
38,795 
108,482 

20,860 
133,313 
154,173 
(45,691)
(3,115)
1,501 
(3,029)
(50,334)
44 
(50,378)

(2.11)

27,754,404 

25,265,918 

23,885,858 

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

2020

Year Ended December 31,
2019

2018

(43,830) $

(54,568) $

(50,378)

(71)
(43,901) $

98 
(54,470) $

49 
(50,329)

$

$

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

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Balances at December 31, 2017
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

Balances at December 31, 2018
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
Issuance of common stock in connection with
employee equity incentive plans

    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
Accounting Standards Codification 326
cumulative effect adjustment upon adoption
Net loss
Net change in unrealized loss on investments

— 

990,758 

— 
— 
— 
— 
24,368,073 

734,453 
4,852 

1,575,342 

— 
— 
— 
— 
26,682,720

1,079,488 

1,257,142 

— 
— 

— 
— 
— 

IRHYTHM TECHNOLOGIES, INC.

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

Common Stock

Shares
23,377,315  $

Amount

Additional
Paid-In
Capital

23  $

236,184  $

Accumulated
Deficit
(156,801) $

Accumulated
Other
Comprehensive
Income (Loss)

Total
Stockholders’
Equity

(65) $

79,341 

— 

— 

— 
— 
— 
— 
23 

— 
— 

2 

— 
— 
— 
25 

— 

2 

— 

— 

9,319 

(3,877)
16,329 
— 
— 
257,955 

9,495 
— 

107,292 

(5,288)
26,241 
— 
— 
395,695 

20,244 

206,023 

(10,009)
34,305 

1,354 

— 

— 
— 
(50,378)
— 
(205,825)

— 
— 

— 

— 
(54,568)
— 
(260,393)

— 

— 

— 

— 

— 

— 
— 
— 
49 
(16)

— 
— 

— 

— 
— 
98 
82 

— 

— 

— 

— 
— 
— 
27  $

— 
— 
— 
646,258  $

(461)
(43,830)
— 

(304,684) $

— 
— 
(71)
11  $

1,354 

9,319 

(3,877)
16,329 
(50,378)
49 
52,137 

9,495 
— 

107,294 

(5,288)
26,241 
(54,568)
98 
135,409 

20,244 

206,025 

(10,009)
34,305 

(461)
(43,830)
(71)
341,612 

Balances at December 31, 2020

29,019,350 $

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
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 in connection with employee equity incentive plans
Tax withholding upon vesting of restricted stock awards
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 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
Capitalized stock-based compensation

$

$

$
$
$
$

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

87

Year Ended December 31,

2020

2019

2018

$

(43,830) $

(54,568) $

(50,378)

6,900 
41,515 
— 
430 
— 
31,431 
— 
— 
6,030 

(37,957)
(1,389)
(3,027)
(6,149)
(3,881)
1,308 
— 
(321)
(4,819)
(13,759)

(13,551)
(277,510)
14,525 
144,145 
(132,391)

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)

206,025 
20,244 
(10,009)
— 
(1,944)
— 
— 
214,316 
68,166 
20,462 
88,628  $

107,369 
9,495 
(5,288)
— 
— 
— 
— 
111,576 
439 
20,023 
20,462  $

2,269 
16,329 
210 
(907)
75 
16,448 
3,029 
(3,141)
— 

(21,747)
(380)
(1,568)
269 
(192)
10,501 
105 
(15)
— 
(29,093)

(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 
20,023 

1,502  $

1,644  $

6,065 

3  $
—  $
621  $
1,129  $

293  $
77  $
88,860  $
—  $

101 
— 
— 
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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  "2019  Shares")  of  common  stock,  in  a  public
offering at a price of $73.00 per share. The 2019 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, after deducting discounts and issuance costs.

On August 21, 2020, the Company issued and sold an aggregate of 1,257,142 shares (the "Shares") of common stock, in a public offering at a
price of $175.00 per share. The Shares included the full exercise of the underwriters’ option to purchase an additional 163,975 shares of common stock.
Total proceeds received from the offering were $206.8 million, after deducting discounts and 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  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 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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Risks and Uncertainties

COVID-19

As a result of the COVID-19 pandemic, the Company has experienced significant business disruptions, restrictions on its ability to travel, reduction in
access to customers due to diverted resources at hospitals, and shortened business hours as governments institute prolonged shelter-in-place and/or self-
quarantine mandates.

Governmental mandates related to the COVID-19 pandemic have impacted, and is expected to continue to impact, Company personnel and personnel
at  third-party  manufacturing  facilities  in  the  United  States  and  other  countries,  and  the  availability  or  cost  of  materials,  which  could  disrupt  our  supply
chain  and  reduce  margins.  For  instance,  on  or  about  March  16,  2020,  the  Health  Officers  of  the  counties  of  San  Francisco  (where  the  Company's
headquarters is located), Santa Clara, San Mateo, Marin, Contra Costa and Alameda, where many employees are located, issued mandatory shelter-in-place
orders and all employees transitioned to a remote work environment. The Company is also subject to orders in Southern California that temporarily shut
down its manufacturing and distribution facilities in Cypress, California. For a limited number of employees who continue to support essential operations,
including  those  at  our  manufacturing  facilities,  the  Company  has  instituted  protective  equipment  policies  and,  to  the  degree  practical,  social  distancing
measures  to  protect  the  safety  of  its  employees.  While  the  Company  has  continued  to  deliver  its  Zio  service  by  operating  with  remote  employees  and
essential employees on site, an extended implementation of these governmental mandates could further impact the Company's ability to effectively provide
its  Zio  service,  and  could  impede  progress  of  all  ongoing  initiatives.  Appropriate  social  distancing  techniques  and  other  measures  at  the  Company's
facilities have been implemented for the limited number of employees who have returned to work to support essential operations, and will not return until
the risk to employee health has meaningfully diminished.

While  hospital  systems  and  healthcare  facilities  shift  their  focus  and  resources  to  treating  COVID-19  patients  and  combating  the  spread  of  the
coronavirus,  the  Company  has  adapted  its  service  to  meet  the  immediate  needs  of  physicians,  customers,  and  patients  and  significantly  increased  the
utilization of its home enrollment service which allows patients to receive and wear the single-use Zio device without going to a healthcare facility.

Given the disruption in demand and an uncertain length of time to recovery, the Company adjusted its operating plan in the second quarter of 2020 by
taking steps to reduce operating spend. These steps included eliminating or delaying spending on non-essential programs, reducing spend on travel and
consulting,  implementing  a  hiring  freeze,  furloughing  approximately  5%  of  employees,  conducting  a  layoff  of  approximately  2%  of  employees  and
implementing temporary pay reductions for our salaried workforce. From May 2020 to July 2020, the Company’s Chief Executive Officer, other named
executive officers and other senior executives agreed to temporary base salary reductions and the Board of Directors agreed to a reduction in its fees until
business and economic conditions improve. The Company also increased it’s bad debt reserve in anticipation of a potential increase in uncollectible co-
payments  from  patients  using  the  Zio  Service.  In  August  2020,  the  Company  reinstated  furloughed  employees,  removed  pay  reductions  for  its  salaried
employees, and resumed hiring for most positions.

The Company is continuously reviewing its liquidity and anticipated capital requirements in light of the significant uncertainty created by the COVID-
19 pandemic. The Company believes it will have adequate liquidity over the next 12 months to operate its business and to meet its cash requirements. As of
December 31, 2020, the Company is in compliance with its financial covenants in its debt agreement.

On March 27, 2020, as a result of the COVID-19 pandemic, Congress enacted the Coronavirus Aid, Relief, and Economic Security Act (the "CARES
Act") to support businesses during the COVID-19 pandemic, including deferment of the employer portion of certain payroll taxes, refundable payroll tax
credits, and technical amendments to tax depreciation methods for qualified improvement property. The primary provisions of the CARES Act which are
potentially applicable to us include:

•

•

certain  amendments  to  the  limitations  on  the  deductibility  of  interest  contained  in  Section  163(j)  of  the  Internal  Revenue  Code  of  1986,  as
amended, for taxable years beginning in 2019 and 2020; and

an allowance of net operating loss carrybacks for taxable years beginning in 2018 and before 2021.

The Company did not qualify for the Paycheck Protection Program under the CARES Act due to the number of employees in our organization. The

CARES Act did not have material impact on the Company’s overall consolidated financial statements.

The  ultimate  impact  of  the  COVID-19  pandemic  is  highly  uncertain  and  subject  to  change.  This  impact  is  having  a  material,  adverse  impact  on

liquidity, capital resources, operations and business and those of the third parties on which the

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Company  relies,  and  could  worsen  over  time.  The  extent  to  which  the  COVID-19  pandemic  impacts  the  Company’s  results  will  depend  on  future
developments, which are highly uncertain and cannot be predicted, including new information which may emerge concerning the severity of the COVID-19
pandemic  and  the  actions  to  contain  the  COVID-19  pandemic  or  treat  its  impact,  among  others.  The  full  extent  of  potential  delays  or  impacts  on  the
business, financial condition, cash flows and results of operations remains unknown. Additionally, while the potential economic impact brought by, and the
duration of, the COVID-19 pandemic is difficult to assess or predict, the COVID-19 pandemic has resulted in, and may continue to result in, significant
disruption of global financial markets, reducing the Company’s ability to raise additional capital through equity, equity-linked or debt financings, which
could negatively impact short-term and long-term liquidity and the ability to operate on a timely basis, or at all.

Furthermore, capital markets and economies worldwide have been negatively impacted by the COVID-19 pandemic, which may result in a period of
regional, national, and global economic slowdown or regional, national, or global recessions that could curtail or delay demand for the Zio service as well
as  increase  the  risk  of  customer  defaults  or  delays  in  payments.  COVID-19  and  the  current  financial,  economic,  and  capital  markets  environment,  and
future developments in these and other areas present material uncertainty and risk with respect to the Company's performance, financial condition, volume
of business, results of operations, and cash flows.

Reimbursement

Government  payors  may  change  their  coverage  and  reimbursement  policies,  as  well  as  payment  amounts,  in  a  way  that  would  prevent  or  limit
reimbursement for the Zio service, which would significantly harm the Company. Government and other third-party payors require the Company to report
the  service  for  which  it  is  seeking  reimbursement  by  using  a  Current  Procedural  Terminology  (CPT),  code-set  maintained  by  the  American  Medical
Association  (AMA).  For  Zio  XT,  the  Company  had  historically  utilized  temporary  CPT  codes  (or  Category  III  CPT  codes),  used  for  newly  introduced
technologies and specific to our category of diagnostic monitoring. 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  took  effect  on  January  1,  2021.  In  August  2020,  CMS  published  the  Calendar  Year  2021  Medicare  Physician  Fee  Schedule  Proposed  Rule
which proposed reimbursement for the Category I CPT codes that were higher than their associated Category III CPT codes. Following a comment period
through October 2020, CMS published its Calendar Year 2021 Medicare Physician Fee Schedule Final Rule (the “Final Rule”) in December 2020. In the
Final Rule, CMS chose not to finalize national pricing for four of the eight Category I CPT codes, 93241, 93243, 93245 and 93247 which include the CPT
codes that the Company will primarily use to seek reimbursement for Zio XT.

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 a
specific  NCD,  as  is  the  case  with  Zio  XT  historically  and  for  Calendar  Year  2021  following  the  Final  Rule,  the  MAC  with  jurisdiction  over  a  specific
geographic region will have the discretion to make an LCD. The Company is seeking to establish LCD pricing with one or more MACs to establish pricing
for 2021 and will be subject to LCD pricing until such time CMS establishes a NCD.

On January 29, 2021, Novitas Solutions, the MAC which covers the region where the Company's IDTF in Houston, Texas is located and where almost
all  Medicare  services  for  Zio  XT  are  processed,  published  rates  for  2021  that  were  significantly  below  our  historical  Medicare  rates  for  Zio  XT.  The
Company believes that the published rates by Novitas on January 29, 2021, are cross walked from CPT codes 93224 and 93226, which are existing CPT
codes for external continuous electrocardiographic recording up to 48 hours, while the Zio service is capable of continuous monitoring for up to 14 days.
The Company is the process of negotiating with Novitas to establish higher pricing for the Category I CPT Codes but can offer no assurances as to the
timing  or  outcome  of  those  discussions.  If  the  published  rates  by  Novitas  remain  unchanged  or  are  not  significantly  improved  for  the  CPT  codes  listed
above thereby allowing us to obtain adequate Medicare reimbursement for the Zio service in the future, the Company may be unable to provide the Zio
service or would experience a significant loss of revenue, either of which would have a material adverse effect on our cash flows, results of operations, and
financial condition.

The  Company  is  currently  holding  a  majority  of  Zio  XT  claims  due  to  the  CPT  code  transition.  Claims  are  being  held  due  to  a  combination  of
negotiations with payors and administrative delays with payors. The Company expects the level of held claims to remain high through the end of the first
quarter  of  2021  and  potentially  beyond.  The  high  level  of  held  claims  will  delay  most  first  quarter  2021  cash  flows  into  the  second  quarter  of  2021  or
potentially beyond, and may impact the timing and accounting for various income statement items, particularly revenue recognition and bad debt expense.
The Company has adequate balance sheet liquidity to manage through these delays in cash flow timing.

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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, the Company will
continue to be subject to changes in the level of Medicare coverage for its products, and unfavorable coverage determinations at the national or local level
could adversely affect its results of operations. If published rates by Novitas are not increased to above the cost of revenue for the Zio service, and the
Company is unable to achieve a level of revenues adequate to support its cost structure, this would raise substantial doubts about the Company's ability to
continue as a going concern.

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, 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,  and  various  inputs  used  in  estimating  stock-based  compensation.  Certain  of  these  estimates  are  impacted  by  uncertainties  surrounding
COVID-19  such  as  revenue  recognition,  contractual  allowances  for  revenue,  allowance  for  doubtful  accounts,  and  stock  based  compensation.  The
Company bases these estimates on historical and anticipated results, trends, and various other assumptions that management 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.

The  Company  periodically  assesses  its  portfolio  of  debt  investments  for  impairment.  For  debt  securities  in  an  unrealized  loss  position,  this
assessment  first  takes  into  account  the  intent  to  sell,  or  whether  it  is  more  likely  than  not  that  the  Company  will  be  required  to  sell  the  security  before
recovery of its amortized cost basis. If either of these criteria are met, the debt security’s amortized cost basis is written down to fair value through interest
and other, net. For debt securities in an unrealized loss position that do not meet the aforementioned criteria, the Company assesses whether the decline in
fair value has resulted from credit losses or other factors.

The  Company  evaluates  expected  credit  losses  by  considering  factors  such  as  historical  experience,  market  data,  issuer-specific  factors,  and
current economic conditions. Expected credit losses on available-for-sale debt securities are recognized in other income, net in the condensed consolidated
statements of operations, and any remaining unrealized losses, net of taxes, are reported as a component of accumulated other comprehensive loss. The
Company did not recognize any credit losses on its available-for-sale securities during the year ended December 31, 2020 and there were no impairment
charges for unrealized losses in the periods presented.

The cost of available-for-sale securities sold is based on the specific-identification method and realized gains and losses are included in earnings.

Amortization of premiums and accretion of discounts are reported as a component of other income, net.

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Accounts Receivable, Allowance for Doubtful Accounts and Contractual Allowances

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 contractual allowances.

The Company establishes an allowance for doubtful accounts for estimated uncollectible receivables based on its assessment of the collectability
of customer accounts 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  Company  regularly  reviews  the  allowances  by  considering  factors  such  as  historical  experience,  credit  quality,  the  age  of  the  accounts

receivable balances, and current economic conditions that may affect a customer’s ability to pay.

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

Balance, beginning of year
Add: adoption of ASC 326
Add: provision for doubtful accounts
Less: write-offs, net of recoveries and other adjustments

Balance, end of year

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

2020

Year ended December 31,
2019

2018

9,049  $
461 
10,515 
(7,314)
12,711  $

7,296  $
— 
9,129 
(7,376)
9,049  $

4,486 
— 
7,353 
(4,543)
7,296 

2020

Year ended December 31,
2019

2018

15,433  $
20,916 
(15,068)
21,281  $

9,205  $

15,518 
(9,290)
15,433  $

6,345 
9,095 
(6,235)
9,205 

$

$

$

$

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 based on the assessment of the collectability of customer accounts, considering factors such as historical experience, credit quality, the age of the
accounts receivable balances, and current economic conditions that may affect a customer’s ability to pay. Centers for Medicare and Medicaid Services
(“CMS”),  accounted  for  approximately  27%,  27%  and  27%  of  the  Company’s  revenue  for  the  years  ended  December  31,  2020,  2019  and  2018,
respectively. CMS accounted for 20% and 20% of accounts receivable as of December 31, 2020 and 2019, respectively.

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Supply Risk

The Company relies on single-source vendors to supply some 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.

A  global  semiconductor  supply  shortage  is  having  wide-ranging  effects  across  multiple  industries.  The  supply  shortage  has  impacted  multiple
suppliers that provide the printed circuit board assemblies to the Company. The semiconductor supply shortage may have an impact on the Company until
global supply is sufficient for global demand.

Inventory

Inventory  owned  by  the  Company  is  valued  at  cost,  on  the  first  in,  first  out  (“FIFO”)  basis,  or  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 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.

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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 $12.6 million and $7.4 million as of December 31, 2020 and 2019, 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.

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 Zio AT mobile cardiac telemetry monitor, a wearable patch-based biosensor, offers what the 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. The Zio
AT service revenue is recognized over the prescription period and delivery of an electronic Zio Report with two performance obligations.

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 portion of the Company’s transactions are covered by third-party payors with whom there is no contractual agreement or 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

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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.

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 of 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  management  judgment.  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 where 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.

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, 2020 and December 31, 2019 were as follows (in thousands):

Contracted third-party payors
Non-contracted third-party payors
Centers for Medicare & Medicaid
Healthcare institutions
Total

2020

Year Ended December 31,
2019

2018

$

$

135,939  $
15,295 
72,536 
41,396 
265,166  $

101,845  $
10,770 
58,918 
43,019 
214,552  $

56,949 
12,447 
40,482 
37,399 
147,277 

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Contract Liabilities

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,  2020,  $1.2  million  relating  to  the  contract  liability  balance  at  the  beginning  of  2020  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, overhead, data analysis, customer care, equipment and infrastructure expenses, amortization
of internal-use software, and shipping and handling. Direct labor includes payroll and personnel-related costs involved in manufacturing. 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.

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  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.

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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 market condition awards is determined using the Monte-Carlo option pricing model and 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.

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, 2020, no renewal options were included in the determination of lease terms.

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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 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  adopted  ASC  326  on  January  1,  2020,  using  the  modified  retrospective  transition  method  through  a  non-cash  $0.5  million
cumulative-effect  increase  to  accumulated  deficit  and  the  allowance  for  doubtful  accounts.  The  Company  considered  the  current  and  expected  future
economic and market conditions surrounding the novel COVID-19 pandemic and recorded additional reserves that were not individually material to the
estimate. Actual results may differ from these estimates.

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.  The  Company  adopted  ASU  No.  2018-15  on  January  1,  2020,  using  the  prospective  transition  method.  The  impact  of  adoption  on  the
Company's consolidated financial statements was not material.

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. The Company elected to early adopt ASU 2019-12
effective as of January 1, 2020, and the impact of adoption on the Company's condensed consolidated financial statements was not material.

In May 2014, the Financial Accounting Standards Board (“FASB”), issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts
with Customers (Topic 606). Areas of revenue recognition affected include, but are not limited to, transfer of control, variable consideration, allocation of
transfer pricing, licenses, time value of money, contract costs and disclosures. The core principle of ASU 2014-09 is to recognize revenues when promised
goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU
2014-09 defines a five-step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the
revenue recognition process than were required under previous GAAP. In addition, Topic 606 requires more detailed disclosures to enable users of financial
statements to understand the nature, timing and uncertainty of revenue and cash flows arising from a review of historical accounting policies and practices
to identify potential differences in applying Topic 606.

The  Company  adopted  this  standard  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.

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The following table presents the impact of adoption of ASU 2014-09 on the Consolidated Statement of Operations and the Consolidated Balance Sheet (in
thousands):

Consolidated Statement of Operations Impact:
Revenue
Sales, General & Administrative Expense
Net Loss

Consolidated Balance Sheet Impact:
Accounts Receivable, net
Accumulated Deficit

As Reported

Without the adoption of Topic 606

Impact

Year Ended December 31, 2018

147,293  $
131,582  $
(48,280) $

145,320  $
132,603  $
(51,274) $

As Reported

Without the adoption of Topic 606

Impact

Year Ended December 31, 2018

21,977  $
(203,515) $

17,629  $
(207,863) $

1,973 
(1,021)
2,994 

4,348 
4,348 

$
$
$

$
$

In February 2016, the Financing Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, 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. 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

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

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3. Cash Equivalents and Investments

The fair value of cash equivalents and available-for-sale investments at December 31, 2020 and 2019, were as follows (in thousands):

December 31, 2020

Gross Unrealized

Gains

Losses

Estimated
Fair Value

Amortized
Cost

59,823  $
190,663 
26,426 
29,489 
306,401  $

—  $
16 
2 
— 
18  $

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

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

$

$

$

$

—  $
(2)
(5)
— 
(7) $

$

$

—  $
(1)
— 
— 
(1) $

$

$

59,823 
190,677 
26,423 
29,489 
306,412 

59,823 
246,589 
— 
306,412 

Estimated
Fair Value

13,897 
77,400 
14,966 
35,753 
142,016 

13,897 
120,089 
8,030 
142,016 

Amortized
Cost

13,897  $
77,329 
14,955 
35,753 
141,934  $

December 31, 2019

Gross Unrealized

Gains

Losses

—  $
72 
11 
— 
83  $

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,

2020

2019

$

$

306,412  $
— 
306,412  $

133,986 
8,030 
142,016 

The  following  tables  present  the  Company's  available-for-sale  securities  that  were  in  an  unrealized  loss  position  as  of    December  31,  2020  (in

thousands):

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Less than 12 months

December 31, 2020
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

28,487  $
13,883 
42,370  $

(2) $
(5)
(7) $

—  $
— 
—  $

—  $
— 
—  $

28,487  $
13,883 
42,370  $

(2)
(5)
(7)

Unrealized losses as of December 31, 2020 were not material. Available-for-sale securities held as of December 31, 2020 had a weighted average

maturity of 92 days. At December 31, 2020, six investments were 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.

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, 2020 were $33.0 million and $33.9 million, respectively. 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 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).

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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

Level 1

Level 2

Level 3

Total

December 31, 2020

59,823  $
— 
— 
— 
59,823  $

—  $

190,677 
26,423 
29,489 
246,589  $

—  $
— 
— 
— 
—  $

59,823 
190,677 
26,423 
29,489 
306,412 

Level 1

Level 2

Level 3

Total

December 31, 2019

13,897  $
— 
— 
— 
13,897  $

—  $

77,400 
14,966 
35,753 
128,119  $

—  $
— 
— 
— 
—  $

13,897 
77,400 
14,966 
35,753 
142,016 

$

$

$

$

5. Balance Sheet Components

Inventory and Other Assets

Inventory consisted of the following (in thousands):

Raw materials
Finished goods

Total

December 31,

2020

2019

$

$

2,469  $
2,844 
5,313  $

1,574 
2,463 
4,037 

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 monitor or Zio AT monitor, a portion of the cost of the PCBA is recorded as a cost of revenue. Each time a wireless gateway is used with
a Zio AT monitor, a portion of the gateway is recorded as a cost of revenue. PCBAs which are recorded as other assets were $12.6 million and $7.4 million
as of December 31, 2020, and December 31, 2019, respectively. The amortization was $3.0 million and $3.6 million for the years ending December 31,
2020 and 2019 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

102

December 31,

2020

2019

$

$

4,667  $
2,005 
3,794 
9,215 
28,416 
48,097 
(13,850)
34,247  $

4,238 
2,315 
3,669 
7,597 
16,277 
34,096 
(7,632)
26,464 

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Depreciation and amortization expense for the years ended December 31, 2020 and 2019 was $6.9 million and $3.4 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
Accrued interest
Claims payable
Other

Total accrued liabilities

6. Commitments and Contingencies

Lease Arrangements

December 31,

2020

2019

$

$

6,007  $

19,709 
851 
1,709 
121 
4,757 
7,378 
40,532  $

3,809 
19,156 
417 
2,846 
128 
2,802 
3,556 
32,714 

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,  2020  was  $12.8  million  which  primarily
consisted  of  lease  payments  and  common  area  maintenance  costs.  Cash  paid  for  operating  leases  during  the  year  ended  December  31,  2020  was
$12.0 million.

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.

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As of December 31, 2020, maturities of operating lease liabilities were as follows (in thousands):

Year Ended December 31:
2021
2022
2023
2024
2025
Thereafter

Less: imputed interest

Total lease liabilities

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

$

$

$

$

9,513 
11,547 
11,667 
12,015 
12,374 
75,420 
132,536 
(43,072)
89,464 

9,253 
11,550 
11,330 
11,667 
12,015 
87,793 
143,608 
(49,946)
93,662 

The weighted average remaining lease term of the Company's operating leases as of December 31, 2020 was 10.59 years. The weighted average

discount rate of the Company's operating leases was 7.37% as of December 31, 2020.

Legal Proceedings

From time to time, we are involved in claims and legal proceedings or investigations, that arise in the ordinary course of business. Such matters
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. These matters are subject to many uncertainties and outcomes that are not predictable.

On February 1, 2021, a putative class action lawsuit was filed in the United States District Court for the Northern District of California alleging that the
Company and our former chief executive officer violated Sections 10(b) and 20(a) of the Exchange Act and SEC Rule 10b-5 promulgated thereunder. The
purported  class  includes  all  persons  who  purchased  or  acquired  our  securities  between  August  4,  2020  and  January  28,  2021.  The  complaint  seeks
unspecified damages purportedly sustained by the class. The Company believes the complaint to be without merit and plans to vigorously defend itself.

Development 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.

The Company and Verily will develop certain next-generation atrial fibrillation (“AF”) screening, detection, or monitoring products pursuant to
the Development Agreement, which products will involve combining Verily and the Company's technology platforms and capabilities. Under the terms of
the Development Agreement, the Company paid Verily an upfront fee of $5.0 million in 2019. In addition, the Company has agreed to make additional
payments to Verily up to an

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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  was  included  in  accounts  payable  as  of  December  31,  2019  and  paid  in  the  first  quarter  of  2020.
During the year ended December 31, 2020, the Company recognized $7.0 million of research and development expense related to Verily milestones, of
which $4.0 million is in included in accrued liabilities.

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.

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

Bank Debt

In December 2015, the Company entered into a Second Amended and Restated Loan and Security Agreement ("Loan Agreement") with Silicon
Valley Bank ("SVB"). Under the SVB Loan Agreement, the Company 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%. The Company could borrow up to 80% of its eligible accounts receivable, up to the maximum of $15.0 million.

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”).  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, 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  made  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  4.25%  and  4.58%  for  the  years  ended
December 31, 2020 and 2019, 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, 2020 we were eligible to borrow up to $7.7 million and no amount
was outstanding under the revolving credit line.

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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 Company was in compliance with loan covenants as of December 31, 2020. The
obligations under the Third Amended and Restated Loan Agreement are collateralized by substantially all assets of the Company.

Future minimum payments

Future minimum payments under the Third Amended and Restated Loan and Security Agreement with Silicon Valley Bank at December 31, 2020

are as follows (in thousands):

Year Ending December 31,
2021
2022
2023

Total
Less: Amount representing interest
Less: Debt Issuance Costs

Total Carrying Value

Reported as:
Short-term debt
Long-term debt

Total

106

$

$

$

$

12,860 
12,358 
9,914 
35,132 

(2,077)
(49)
33,006 

11,667 
21,339 
33,006 

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8. Income Taxes

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)

Total Tax Expense (benefit)

2020

December 31,
2019

2018

$

—  $
181 
59 
240 

— 
— 
(11)
(11)

—  $
— 
68 
68 

— 
— 
(3)
(3)

$

229  $

65  $

— 
— 
80 
80 

— 
— 
(36)
(36)

44 

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

2020

December 31,
2019

2018

$

$

(9,172) $
(20,762)
177 
805 
(1,426)
— 
30,607 

229  $

(11,446) $
(5,560)
409 
614 
(1,128)
— 
17,176 

65  $

(10,570)
(8,557)
309 
148 
(1,015)
44 
19,685 
44 

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.

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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,

2020

2019

$

91,034  $
7,110 
8,831 
14,996 
22,624 
144,595 
(123,803)
20,792 

(108)
(20,634)
(20,742)

$

50  $

64,648 
5,601 
5,932 
11,443 
23,869 
111,493 
(88,433)
23,060 

(850)
(22,171)
(23,021)
39 

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 $35.4 million and $22.0 million for the years ended December 31, 2020 and December 31,
2019,  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, 2020, 2019 and 2018 (in

thousands):

Year Ended December 31, 2018
Year Ended December 31, 2019
Year Ended December 31, 2020

Balance at beginning
of year

Additions

Deductions

$

$

44,321  $
66,435 
88,433  $

22,114  $
21,998 
35,370  $

Balance at end of year
66,435 
88,433 
123,803 

—  $
— 
—  $

As of December 31, 2020, the Company had approximately $368.2 million of federal and $218.7 million of state net operating loss carryforwards

available to offset future taxable income which expires in varying amounts beginning in 2027 and 2020 respectively.

As of December 31, 2020, the Company had research tax credit carryforwards of approximately $6.9 million, and $3.1 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.

Effective January 1, 2019, the Company adopted ASC 740-10 (formerly known as FIN 48), Accounting for Income Taxes, guidance that addresses
the  recognition,  measurement,  and  disclosure  of  uncertain  tax  positions.  Total  unrecognized  income  tax  benefits  was  $2.3  million  and  $1.8  million  at
December 31, 2020 and 2019, respectively. The Company does not anticipate the total amounts of unrecognized tax benefits will significantly increase or
decrease in the next 12 months.

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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 balance related to prior year tax positions
Balance at end of year

2020

Year Ended December 31,
2019

2018

1,842  $
488 
— 
(28)
2,302  $

1,459  $
383 
— 
— 
1,842  $

943 
441 
75 
— 
1,459 

$

$

The total amount of gross unrecognized tax benefits was $2.3 million, $1.8 million, and $1.5 million as of December 31, 2020, 2019, and 2018
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, 2020, 2019 and 2018.

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
and state tax authorities. The UK is open to examination for tax years starting 2017 and forward. 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,  as  amended,  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, 2020.

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

Options issued and outstanding
Unvested restricted stock units
Shares available for grant under future stock plans
Shares available for future issuance

10. Stock Incentive Plans

2006 Plan

December 31,

2020

609,881 
1,114,159 
8,016,517 
9,740,557 

2019
1,503,247 
886,030 
6,709,235 
9,098,512 

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.

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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, 2020, the Company has reserved 8,693,162 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, 2020, 420,352 shares of common stock have been issued to employees participating in the ESPP and 1,511,127 shares were

available for issuance under the ESPP.

The Company used the following assumptions to estimate the fair value of the ESPP offered for the year ended December 31, 2020: expected term

of 0.5 – 1 year, volatility of 68.72% - 75.78%, risk-free interest rate of 0.11% - 0.18% 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, 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.

Equity Incentive Plan Activity

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

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Balance at December 31, 2017
Additional options 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
Additional awards authorized
Awards granted
Awards forfeited
Awards withheld for tax purposes

Balance at December 31, 2020

Shares Available
for Grant

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 
1,333,928 
(595,915)
156,623 
82,622 
6,505,390 

During the year ended December 31, 2020, 595,915 restricted stock units ("RSUs") were granted, 235,915 RSUs vested, and 131,871 RSUs were

forfeited.

The following table summarizes stock option activity under the 2006 and 2016 Equity Incentive Plans:

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 granted
Options exercised
Options forfeited

Balance at December 31, 2020

Options exercisable – December 31, 2020

Options vested and expected to vest – December 31, 2020

Options Outstanding

Weighted-
Average
Exercise
Price Per
Share

Weighted-
Average
Remaining
Contractual
Life (years)

Aggregate
Intrinsic
Value
(in thousands)

12.24 
68.32 
7.19 
34.30 
23.20 
82.77 
9.59 
54.54 
27.40 
— 
17.31 
66.89 

40.18 

34.36 

40.01 

7.17 $

113,958 

7.02 $

97,976 

6.43

62,401 

6.24

6.02

6.24

120,163 

98,672 

119,583 

Options
Outstanding

2,601,181  $
366,928  $
(798,424) $
(75,548) $
2,094,137  $
20,010  $
(540,307) $
(70,593) $
1,503,247  $
—  $
(868,614) $
(24,752) $
609,881  $
486,423  $
606,418  $

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, and 2018, the Company granted options with a weighted-average grant date fair value of $38.29 and

$32.38 per share, respectively. The Company did not grant any options during the year ended December 31, 2020.

The aggregate intrinsic value of options exercised was $109.2 million, $36.9 million and $52.4 million for the years ended December 31, 2020,
2019 and 2018, respectively. The total estimated grant date fair value of options vested during the period was $4.9 million, $7.8 million and $5.3 million
for the years ended December 31, 2020, 2019 and 2018, respectively.

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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, 2020, is as follows:

Shares
Underlying
RSUs

Weighted
Average
Grant Date
Fair Value

547,891  $
629,901  $
(180,842) $
(110,920) $
886,030  $
595,915  $
(235,915) $
(131,871) $
1,114,159  $

56.62 
87.72 
52.52 
69.77 
77.92 
104.09 
69.01 
59.85 
94.25 

Weighted
Remaining
Vesting
Period
(in years)

Aggregate
Intrinsic
Value
(in thousands)

2.45 $

38,067 

1.39 $

60,330 

1.38 $

264,290 

Non-vested as of December 31, 2018
Granted
Vested
Forfeited
Non-vested as of December 31, 2019
Granted
Vested
Forfeited
Non-vested as of December 31, 2020

11. Stock-Based Compensation

Employee Options Valuation

The fair value of employee and director stock options was estimated at the date of grant using the Black-Scholes option pricing model with the

weighted average assumptions below.

Expected term (in years)
Expected volatility
Risk-free interest rate
Dividend yield

The Company did not grant stock options during the year ended December 31, 2020.

Market-based RSU Valuation

Year Ended Year ended December 31,

2019

2018

6.1
45.0 %
2.39 %
— %

6.1
45.7 %
2.75 %
— %

The fair value of market based RSUs was estimated at the date of grant using the Monte-Carlo option pricing model with the assumptions below.

Additional details on the Company's market based RSUs are included below.

Expected term (in years)
Expected volatility
Risk-free interest rate
Dividend yield

Year Ended
December 31,
2020

0.74
63.0 %
0.17 %
— %

Fair Value of Common Stock— 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

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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 and comprehensive loss for

all periods presented (in thousands):

Cost of revenue
Research and development
Selling, general and administrative

Total stock-based compensation expense

2020

Year Ended December 31
2019

2018

$

$

27  $

7,727 
33,761 
41,515  $

658  $

4,462 
21,121 
26,241  $

193 
3,057 
13,079 
16,329 

As of December 31, 2020, there was total unamortized compensation costs of $3.9 million, net of estimated forfeitures, related to unvested stock
options,  which  the  Company  expects  to  recognize  over  a  period  of  approximately  1.1  years  $61.4  million,  net  of  estimated  forfeitures,  related  to
unrecognized RSU expense, which the Company expects to recognize over a period of 2.2 years, and $1.9 million unrecognized ESPP expense, which the
Company will recognize over 0.9 years.

Performance based RSUs ("PRSU") and Market-based RSUs

The Company grants PRSUs to key executives of the Company. PRSUs can be earned in accordance with the performance equity program for

each respective grant

2019 Awards

In February 2019, the company granted PRSU's ("2019 awards") to be earned based on the compound annual growth rate ("CAGR") of fiscal year

2020's revenue compared to fiscal year 2018's revenue.

Due  to  the  impact  of  the  COVID-19  pandemic,  management  determined  that  the  Company’s  achievement  of  its  performance  targets  described
above, was not probable in the first quarter of fiscal year 2020. PRSU expense of $4.8 million recognized in fiscal year 2019 related to the 2019 awards
was reversed in the first quarter of fiscal year 2020.

On June 19, 2020, the Company modified the terms of the 2019 awards to vest based on the Company’s average stock price. The modification
impacted  all  active  recipients  of  the  2019  awards,  a  total  of  ten  recipients.  The  total  incremental  compensation  cost  resulting  from  the  modification  of
$13.6  million  will  be  recognized  ratably  through  March  of  2021.  The  Company  recognized  $10.2  million  of  compensation  cost  for  the  year  ended
December 31, 2020 in connection with the 2019 awards.

February 2020 Awards

In February 2020, the company granted PRSU's ("February 2020 awards") for fiscal year 2022's annual unit volume CAGR compared to fiscal
year 2019's annual unit volume CAGR, measuring a minimum performance threshold of 19.7% to earn 50% of target, and a maximum threshold of 29%
achieved to earn 200% of target. A total of 133,834 PRSU shares were granted with grant date fair value of $11.0 million. The 2020 awards also include a
service-based component.

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Compensation cost in connection with the probable number of shares that will vest will be recognized ratably through March of 2021. During the
year ended December 31, 2020, the Company determined that it was probable that the February 2020 Awards would vest and recognized $1.4 million of
compensation cost in connection with the February 2020 awards.

Non employee Stock-Based Compensation

On July 3, 2020, the Company’s Chief Financial Officer (“CFO”) resigned and entered into a Consulting and Professional Services Agreement
(“CPSA”) with the Company to provide consulting services through July 2, 2021. Pursuant to the original terms of the awards, the CFO will continue to
vest in outstanding awards as long as services are provided to the Company under the CPSA as a non-employee consultant. In accordance with ASC 718,
the Company recognized expense related to all awards expected to vest over the duration of the CPSA in the current period as an equity- based severance
cost as the consulting services are not substantive.

Total  expense  related  to  non-employee  stock-  based  compensation  recognized  for  the  year  ended  December  31,  2020  was  $1.8  million.  The

Company did not recognize any non-employee stock-based compensation expense for the years ended December 31, 2019 and 2018.

12. Net Loss Per Common Share

As the Company had net losses for the years ended December 31, 2020, 2019 and 2018, 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, 2020, 2019 and
2018 (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

2020

Year Ended December 31,
2019

2018

$

$

(43,830) $

(54,568) $

(50,378)

27,754,404 

25,265,918 

23,885,858 

(1.58) $

(2.16) $

(2.11)

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

December 31, 2020, 2019 and 2018 because their inclusion would be anti-dilutive:

Options to purchase common stock
RSUs issued and unvested
Warrants to purchase common stock

Total

13. Selected Quarterly Financial Data (unaudited)

2020

609,881 
1,114,159 
— 
1,724,040 

Year Ended December 31,
2019
1,503,247 
886,030 
— 
2,389,277 

2018
2,094,137 
547,891 
4,857 
2,646,885 

The  following  table  presents  selected  unaudited  financial  data  for  each  of  the  eight  quarters  in  the  two-year  period  ended  December  31,  2020,
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 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
2020:
Total revenues
Gross profit
Net loss
Net loss per common share, basic and diluted
2019:
Total revenues
Gross profit
Net loss
Net loss per common share, basic and diluted

March 31

June 30

September 30

December 31

$

$

$

$

63,535  $
47,472 
(9,065)

(0.34) $

48,334  $
36,561 
(8,250)

(0.34) $

50,878  $
35,394 
(20,437)

(0.75) $

52,441  $
39,429 
(10,725)

(0.43) $

71,944  $
53,712 
(4,677)

(0.17) $

54,673  $
40,888 
(18,293)

(0.72) $

78,809 
58,311 
(9,651)
(0.33)

59,104 
45,189 
(17,300)
(0.65)

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

As Reported

June 30, 2019
Adjustment

As Revised

53,331  $
40,506 
(11,467)

(0.46) $

(890) $

(1,077)
742 
0.03  $

52,441 
39,429 
(10,725)
(0.43)

As Reported

March 31, 2019
Adjustment

As Revised

47,214  $
35,484 
(8,019)

(0.33) $

1,120  $
1,077 
(231)
(0.01) $

48,334 
36,561 
(8,250)
(0.34)

$

$

$

$

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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

As of December 31, 2018
Adjustment

As Revised

$

21,977  $
106,482 
119,710 

26,570 
1,243 
30,236 
65,288 
(41)
(203,515)
54,422 
119,710 

(2,187) $
(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 

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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

Revised Consolidated Statements of Comprehensive Loss

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

As Reported

Year ended December 31, 2018
Adjustment

As Revised

147,293  $
38,579 
108,714 
20,750 
131,582 
152,332 
(43,618)
1,526 
(48,236)
(48,280)
(2.02)

(16) $
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

Year ended December 31, 2018
Adjustment

As Revised

(48,280) $
24 
(48,256)

(2,098) $
25 
(2,073)

(50,378)
49 
(50,329)

$

$

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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

Revised Consolidated Statements of Shareholder's Equity

As Reported

Year ended December 31, 2018
Adjustment

As Revised

$

(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 

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

Year Ended December 31, 2018
Adjustment

As Revised

$

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 

15. Subsequent Events

Novitas Announcement

In December 2020, CMS published its Calendar Year 2021 Medicare Physician Fee Schedule Final Rule (the “Final Rule”). In the Final Rule, CMS did not
finalize  national  pricing  for  the  extended  external  ECG  patch,  medical  magnetic  tape  recorder  (SD339)  supply,  and  ruled  to  contractor  pricing  for  CPT
codes 93241, 93243, 93245 and 93247. The Company has been working with Medicare Administrative Contractors (MACs) to establish pricing for these
codes.

On  January  29,  2021,  Novitas  Solutions,  the  MAC  which  covers  the  region  where  the  Company's  Independent  Diagnostic  Testing  Facility  in  Houston,
Texas where almost all Medicare services for Zio XT are processed, published rates for 2021 that were significantly below historical Medicare rates for Zio
XT.  The  Company  believes  that  the  published  rates  by  Novitas  on  January  29,  2021,  are  cross  walked  from  CPT  codes  93224  and  93226,  which  are
existing CPT codes for external continuous electrocardiographic recording up to 48 hours, while the Zio service is capable of continuous monitoring for up
to 14 days. The Company is in the process of negotiating with Novitas to establish higher pricing for the Category I CPT Codes but can offer no assurances
as  to  the  timing  or  outcome  of  those  discussions.  In  the  event  that  Novitas  does  not  publish  new  higher  rates  or  that  new  rates  are  not  backdated  to  a
January 1st effective date, The company will recognize medicare revenue starting January 1, 2021 at the Novitas rates published January 29th.

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Employee Bonus

In April 2020, the Company's Compensation Committee of the Board of Directors ("Compensation Committee") approved bonus metrics for the employee
bonus program and confirmed that the bonus would be paid to employees in RSUs in an effort to preserve cash while assessing the impact of COVID-19.
The Company accrued employee bonus under ASC 718 for the year ended December 31, 2020.

In February 2021, the Compensation Committee approved the achievement of the bonus metrics and confirmed that the employee bonus would be paid out
in cash given the company's current liquidity. The Company will apply this change prospectively under ASC 480 in the first quarter of 2021.

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,  2020,  our  disclosure  controls  and  procedures  were  not  effective  at  the
reasonable assurance level because of the material weakness in internal controls previously disclosed and discussed below. Notwithstanding the material
weakness, our management, including our CEO and CFO, has concluded that our consolidated financial statements, included in the 2020 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.

In  light  of  the  material  weakness  described  below,  the  Company  performed  additional  analysis  and  other  post-closing  procedures  to  determine  its
consolidated financial statements are prepared in accordance with generally accepted accounting principles. Accordingly, management concluded that the
financial statements included in this report fairly present in all material respects the Company’s financial condition, results of operations and cash flows for
the periods presented.

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, 2020
using  the  criteria  described  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.

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 additional material weaknesses, previously disclosed and remediated, as discussed below. In aggregate, these material weaknesses resulted in
the misstatement of our revenues, revenue reserves, bad debt expense, property and equipment, research and development

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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,
this  material  weakness  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. Based  on  this  assessment  and  because  of  this  material  weakness,  we
concluded that the Company's internal control over financial reporting was not effective as of December 31, 2020.

The effectiveness of the Company’s internal control over financial reporting as of December 31, 2020 has been audited by PricewaterhouseCoopers LLP,
an independent registered public accounting firm, as stated in their report which is included in Part II, Item 8 of this Annual Report on Form 10-K.

Remediation Plan Activities

As it relates to the material weakness that continues to exist as of December 31, 2020, we performed the following actions:

•

Increased  the  depth  and  experience  of  our  Finance  organization  by  increasing  the  number  of  management  and  staff  members,  expanding  our
technical experience in accounting, auditing and reporting matters, and performing internal controls training for management and staff members.
• Hired  two  Internal  Audit  Directors  (one  with  broad  Finance  experience  and  one  with  relevant  control  experience  over  information  technology
environments). These individuals are focused on the development, maintenance and monitoring of our overall control environment and system of
key internal controls over financial reporting.

We  remain  committed  to  the  continued  hiring  and  on-boarding  of  additional  members  of  the  organization  supporting  the  internal  control  over  financial
reporting. As of December 31, 2020, we have filled key positions within the Finance organization and will continue to add skilled talent as complexities
grow and needs arise.

These  investments  in  resources  have  significantly  improved  the  stability  of  our  accounting  organization.  While  significant  progress  has  been  made  in
response to the material weakness in the control environment, key remediation plan activities include additional training programs and hiring of additional
resources in support of certain control activities. Additionally, time is needed to demonstrate sustainability as it relates to our internal control over financial
reporting and improvements made to our complement of resources, including demonstrating sustained operating effectiveness of our internal controls.

Remediation of Previously Disclosed Material Weaknesses

Additional material weaknesses were previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2019 and the

following elements have been remediated as of December 31, 2020:

• Material weakness related to the financial statement close process

We did not effectively execute our controls over the financial statement close process, to ensure the prevention or detection of a misstatement that
could  be  material.  Specifically,  we  previously  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 have detected errors in a
timely manner that could be material 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.

• Material weakness related to the accounting for revenue and related accounts receivables and reserves

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.

During  the  year  ended  December  31,  2020,  we  completed  the  testing  and  evaluation  of  the  operating  effectiveness  of  the  newly  designed  and

implemented and enhanced controls and concluded these material weaknesses have been remediated as of December 31, 2020.

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Changes in Internal Control Over Financial Reporting

There have been no changes in internal control over financial reporting during the quarter ended December 31, 2020 that have materially affected,

or are reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitations on Effectiveness of Controls

Internal  control  over  financial  reporting  has  inherent  limitations.  Internal  control  over  financial  reporting  is  a  process  that  involves  human
diligence and compliance and is subject to lapses in judgment and breakdowns resulting from human failures. Internal control over financial reporting can
also  be  circumvented  by  collusion  or  improper  management  override  of  the  controls.  Projections  of  any  evaluation  of  controls  effectiveness  to  future
periods are subject to the risk that controls may become inadequate because of changes in conditions, or deterioration in the degree of compliance with
policies or procedures.

Item 9B. Other Information.

None.

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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 2021 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2020.

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 2021 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2020.

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 2021 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2020.

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 2021 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2020.

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 2021 Annual Meeting of Stockholders within 120 days after the end of the fiscal year ended December 31, 2020.

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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.

123

Exhibit Index

Incorporated by Reference

Table of Contents

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.

Exhibit
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

Filing Date
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

September 23, 2016

September 23, 2016

September 23, 2016

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

333-213773

333-213773

333-213773

S-1

S-1

S-1

S-1

S-1

S-1

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

S-1/A

333-213773

S-1

S-1

S-1

333-213773

333-213773

333-213773

10.16

10.17

10.18

10.19

10.20

October 7, 2016

October 7, 2016

September 23, 2016

September 23, 2016

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

10.40
10.41

21.10
23.10
31.10

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.
Executive Change in Control and Severance Policy
Underwriting Agreement by and among iRhythm Technologies, Inc. and J.P.
Morgan Securities LLC and Morgan Stanley & Co. LLC as representatives of
the several underwriters named therein, dated August 18, 2020.
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.

S-1/A

333-213773

S-1

S-1

333-213773

333-213773

10.21

10.22

10.23

October 7, 2016

September 23, 2016

September 23, 2016

S-1/A

333-213773

10.24

October 7, 2016

S-1

S-1

S-1

S-1

333-213773

333-213773

333-213773

333-213773

10-Q

333-213773

S-1

333-213773

S-1/A

333-213773

10-Q

10-Q

10-Q

333-213773

333-213773

333-213773

10.25

10.26

10.27

10.28

10.29

10.30

10.31

10.32

10.33

10.34

September 23, 2016

September 23, 2016

September 23, 2016

September 23, 2016

November 14, 2017

September 23, 2016

October 7, 2016

August 7, 2017

August 3, 2018

August 3, 2018

8-K

333-213773

10.1

October 29, 2018

10-Q

10-Q

10-Q

10-Q
8-K

333-213773

333-213773

333-213773

333-213773
333-213773

10.37

10.38

10.39

10.40
10.41

December 23, 2019

December 23, 2019

December 23, 2019

August 7, 2020
August 21, 2020

S-1

333-213773

21.1

September 23, 2016

Table of Contents

31.20

32.1†

101.INS
101.SCH
101.CAL
101.DEF
101.LAB
101.PRE

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.
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: February 26, 2021

Company Name

By:

/s/ Michael Coyle
Michael Coyle
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/ Michael Coyle
Michael Coyle

/s/ Douglas J. Devine
Douglas J. Devine

/s/ Bruce G. Bodaken
Bruce G. Bodaken

/s/ Ralph Snyderman M.D.
Ralph Snyderman M.D.

/s/ C. Noel Bairey Merz, M.D.
C. Noel Bairey Merz, M.D.

/s/ Mark J. Rubash
Mark J. Rubash

/s/ Raymond W. Scott
Raymond W. Scott

/s/ Renee Budig
Renee Budig

/s/ Kevin M. King
Kevin M. King

/s/ Abhijit Y. Talwalkar
Abhijit Y. Talwalkar

President, Chief Executive Officer and Director
(Principal Executive Officer)

February 26, 2021

Chief Financial Officer
(Principal Financial Officer)

Director

Director

Director

Director

Director

Director

Director

February 26, 2021

February 26, 2021

February 26, 2021

February 26, 2021

February 26, 2021

February 26, 2021

February 26, 2021

February 26, 2021

Director and Chairman of the Board

February 26, 2021

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23.1

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-236838, 333-233033, 333-223351, 333-214203
and 333-217077) of iRhythm Technologies, Inc. of our report dated February 26, 2021 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
February 26, 2021

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, Michael C. Coyle, 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: February 26, 2021

By:

/s/ Michael C. Coyle
Michael C. Coyle
President and Chief Executive Officer
(Principal Executive Officer)

CERTIFICATION OF CHIEF FINANCIAL OFFICER
Pursuant to
Securities Exchange Act Rules 13a-14(a) and 15d-14(a),
As Adopted Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002

Exhibit 31.2

I, Douglas J. Devine, 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: February 26, 2021

By:

/s/ Douglas J. Devine

Douglas J. Devine
Chief Financial Officer

CERTIFICATIONS OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.1

In connection with the Annual Report of iRhythm Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2020 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: February 26, 2021

By:

By:

/s/ Michael C. Coyle
Michael C. Coyle
President and Chief Executive Officer
(Principal Executive Officer)

/s/ Douglas J. Devine
Douglas J. Devine
Chief Financial Officer
(Principal Financial Officer)