# EDGAR Filing Document

**Accession Number:** 0001506492
**File Stem:** 0001140361-26-007339
**Filing Date:** 2026-3
**Character Count:** 10079
**Document Hash:** aff4c0463357acb0ce24d2ab1f27d4bd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-007339.hdr.sgml**: 20260302

**ACCESSION NUMBER**: 0001140361-26-007339

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260224

**FILED AS OF DATE**: 20260302

**DATE AS OF CHANGE**: 20260302

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** McDonald David
- **CENTRAL INDEX KEY:** 0001455136

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35312
- **FILM NUMBER:** 26707605

**MAIL ADDRESS:**
- **STREET 1:** 6 KEMPTON PLACE
- **STREET 2:** #12
- **CITY:** SARATOGA SPRINGS
- **STATE:** NY
- **ZIP:** 12866
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Nuwellis, Inc.
- **CENTRAL INDEX KEY:** 0001506492
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 680533453
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 12988 VALLEY VIEW ROAD
- **CITY:** EDEN PRAIRIE
- **STATE:** MN
- **ZIP:** 55344
- **BUSINESS PHONE:** 952-345-4200

**MAIL ADDRESS:**
- **STREET 1:** 12988 VALLEY VIEW ROAD
- **CITY:** EDEN PRAIRIE
- **STATE:** MN
- **ZIP:** 55344

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CHF Solutions, Inc.
- **DATE OF NAME CHANGE:** 20170523

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Sunshine Heart, Inc.
- **DATE OF NAME CHANGE:** 20101124

## Ex-24

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**Exhibit 24**<br>

**** 

<br> #### POWER OF ATTORNEY

Know all by these presents that the undersigned hereby constitutes and appoints each of Neil P. Ayotte, Adam Garvey, Phillip D. Torrence, Jessica Herron, Sarah Meinel, or Stephanie Swan, or any of them signing individually, and with full power of substitution, the undersigned's true and lawful attorney-in-fact and in the undersigned's name, place and stead, in the undersigned's capacity as an officer, director or stockholder of Nuwellis, Inc. (the "Company") to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) take such actions as may be necessary or appropriate to enable the
 undersigned to submit and file forms, schedules and other documents with the U.S. Securities and Exchange Commission ("SEC") utilizing the SEC's Electronic Data Gathering and Retrieval ("EDGAR") system, which actions may include (a)
 enrolling the undersigned in EDGAR Next and (b) preparing, executing and submitting to the SEC a Form ID, amendments thereto, and such other documents and
 information as may be necessary or appropriate to obtain codes and passwords enabling the undersigned to make filings and submissions utilizing the EDGAR system;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) prepare, execute and submit and file with the SEC any and all forms, schedules and other documents (including any amendments thereto) the
 undersigned is required to file with the SEC, or which such attorney-in-fact considers it advisable for the undersigned to file with the SEC, under Section 13 or Section 16 of the Securities Exchange Act of 1934 (the "Exchange Act") or any
 rule or regulation thereunder, or under Rule 144 under the Securities Act of 1933, as amended, including Forms 3, 4 and 5, Schedules 13D and 13G, and Forms 144 (all such forms, schedules and other documents being referred to herein as "SEC
 Filings") and to file submit or otherwise deliver SEC Filings to any securities exchange on which the Company's securities may be listed or traded;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) in the case of Neil P. Ayotte and Adam Garvey, each individually, to act as an
 account administrator for the undersigned's EDGAR account, including: (i) appoint, remove and replace account administrators, account users, technical administrators and delegated entities; (ii) maintain the security of the
 undersigned's EDGAR account, including modification of access codes; (iii) maintain, modify and certify the accuracy of information on the undersigned's EDGAR account dashboard; (iv) act as the EDGAR point of contact with respect to the
 undersigned's EDGAR account; and (v) any other actions contemplated by Rule 10 of Regulation S-T with respect to account administrators; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) in the case of Phillip Torrence, Jessica Herron, Sarah Meinel and Stephanie Swan,
 each individually, to act as a delegated administrator for the undersigned's EDGAR account, including: (i) appoint, remove and replace delegated account administrators and users; (ii) maintain the security of the undersigned's
 EDGAR account; and (iii) any other actions contemplated by Rule 10 of Regulation S-T with respect to delegated entities.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or advisable to be done in connection with the foregoing, 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 such attorney-in-fact's 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 the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act.

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This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file SEC Filings 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. This Power of Attorney revokes all previous powers of attorney with respect to the subject matter of this Power of Attorney.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of February <u>25th</u>, 2026.

---

| |
|:---|
| /s/ David McDonald |
| David McDonald |

---

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>McDonald David<br><sub>(Last) (First) (Middle)</sub><br>12988 VALLEY VIEW ROAD<br><sub>(Street)</sub><br>EDEN PRAIRIE, MN 55344<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Nuwellis, Inc. [ NUWE ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-02-24 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<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 Beneficially Owned

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|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

---

## Table II - Derivative Securities Beneficially Owned

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|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Nonstatutory Stock Option<sup>(1)</sup> | <sup>(2)</sup> | 2034-01-01 | Common Stock | 7 | $1.32 | D |  |
| Nonstatutory Stock Option | <sup>(3)</sup> | 2035-05-19 | Common Stock | 416 | $1.36 | D |  |

---

### Footnotes:

(1) The reporting person was a member of the Board of Directors (the "Board") of the Issuer from November 1, 2023 until January 21, 2026, and filed an initial Form 3 on November 1, 2023.  He was reappointed to the Board on February 24, 2026.

(2) The option is fully vested.

(3) Vests in 12 approximately equal consecutive monthly increments, commencing on the one-month anniversary of the date of grant, so that all of the options will be vested on the one-year anniversary of the date of grant.

**Remarks:**
Exhibit 24, Power of Attorney, is attached.

**Signature:** /s/ Neil P. Ayotte, by Power of Attorney  
**Date:** 2026-03-02

### 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.**