# EDGAR Filing Document

**Accession Number:** 0001388658
**File Stem:** 0001388658-23-000016
**Filing Date:** 2023-3
**Character Count:** 10097
**Document Hash:** 01a99d894c8e28c60e108273f02452b8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001388658-23-000016.hdr.sgml**: 20230301

**ACCESSION NUMBER**: 0001388658-23-000016

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20230227

**FILED AS OF DATE**: 20230301

**DATE AS OF CHANGE**: 20230301

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Day Mark J.
- **CENTRAL INDEX KEY:** 0001769845

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37918
- **FILM NUMBER:** 23695482

**MAIL ADDRESS:**
- **STREET 1:** C/O IRHYTHM TECHNOLOGIES, INC.
- **STREET 2:** 650 TOWNSEND STREET, SUITE 500
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94103
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** iRhythm Technologies, Inc.
- **CENTRAL INDEX KEY:** 0001388658
- **STANDARD INDUSTRIAL CLASSIFICATION:** SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
- **IRS NUMBER:** 208149544
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 699 8TH STREET
- **STREET 2:** SUITE 600
- **CITY:** San Francisco
- **STATE:** CA
- **ZIP:** 94103
- **BUSINESS PHONE:** 415-632-5700

**MAIL ADDRESS:**
- **STREET 1:** 699 8TH STREET
- **STREET 2:** SUITE 600
- **CITY:** San Francisco
- **STATE:** CA
- **ZIP:** 94103

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** IRhythm Technologies, Inc.
- **DATE OF NAME CHANGE:** 20110429

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** IRhythm Technologies Inc
- **DATE OF NAME CHANGE:** 20070201

## Ex-24

```
<pre>
POWER OF ATTORNEY
KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Ruhina Quadir (Dir, SEC Financial Reporting and Technical Accounting), Curt Wvong (Controller), Brice Bobzien (Chief Financial Officer), Nicole Greene (VP, Global Legal), Patrick Murphy (Chief Legal Counsel), and each of them, as the undersigned's true and lawful attorney-in-fact to:
(1) execute for and on behalf of the undersigned, in the undersigned's capacity as a representative of iRhythm Technologies, Inc. (the "Company"), any and all Form ID, or Form 3, 4 or 5 reports and any amendments thereto required to be filed by the undersigned in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the rules thereunder with respect to transactions in the Company's securities;
(2) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form ID, or Form 3, 4 or 5 report and any amendments thereto and timely file such report with the U.S. Securities and Exchange Commission and any stock exchange or similar authority; and
(3) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by
such attorney-in-fact on behalf of the undersigned, pursuant to this Power of Attorney, shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in his or her discretion.
The undersigned hereby grants to each such attorney-in-fact full power and authority to
do and perform each and every act and thing whatsoever requisite, necessary, and proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or his or her substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that no such attorney-in-fact, in serving in such capacity at the request of the undersigned, is hereby assuming, nor is the Company hereby assuming, any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act. This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Form 3, 4 or 5 reports with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of 02/01/2023.
Signature: /S/ Mark Day
Print Name: Mark Day
</pre>
```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Day Mark J.<br><sub>(Last) (First) (Middle)</sub><br>C/O IRHYTHM TECHNOLOGIES, INC.<br>699 8TH ST #600<br><sub>(Street)</sub><br>SAN FRANCISCO, CA 94103<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Technology Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>iRhythm Technologies, Inc. [ IRTC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2023-02-27 |  | A |  | 8354<sup>(1)</sup> | A | $0 | 55376<sup>(2)(3)</sup> | D |  |
| Common Stock | 2023-02-27 |  | A |  | 3468<sup>(4)</sup> | A | $0 | 58844 | D |  |
| Common Stock | 2023-02-28 |  | S |  | 1898<sup>(5)</sup> | D | $117.83 | 56946 | D |  |
| Common Stock | 2023-02-28 |  | S |  | 15<sup>(5)</sup> | D | $119.28 | 56931 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) These securities are restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. 25% of the RSUs vest on March 1, 2024 and each one-year anniversary thereafter, subject to the Reporting Person continuing as a service provider through each such date.

(2) Includes 303 shares acquired under the Issuer's employee stock purchase plan on May 31, 2022.

(3) Includes 14 shares acquired under the Issuer's employee stock purchase plan on November 30, 2022.

(4) Represents the acquisition of shares upon the determination of the Compensation Committee of the Board of Directors of the Issuer that the performance conditions were met with respect to performance RSUs granted to the Reporting Person on February 25, 2020.

(5) These shares were sold to cover tax withholding and remittance obligations in connection with the vesting of RSUs.

**Remarks:**
Exhibit 24 Power of Attorney.

**Signature:** /s/ Brice Bobzien, attorney-in-fact  
**Date:** 2023-03-01

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**