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

FORM 8-K

Current Report Pursuant to Section 13 or 15(d) of
the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 23, 2026

Nuwellis, Inc.
(Exact Name of Registrant as Specified in its Charter)

Delaware
001-35312
No. 68-0533453
(State or Other Jurisdiction of Incorporation or Organization)
(Commission File Number)
(I.R.S. Employer Identification No.)

12988 Valley View Road, Eden Prairie, MN
(Address of Principal Executive Offices)
  
55344
(Zip Code)

(952) 345-4200
(Registrant’s Telephone Number, Including Area Code)

Not Applicable
(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


 ☐
 Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading Symbol(s)
Name of each exchange on which
registered
Common Stock, par value $0.0001 per share
NUWE
Nasdaq Capital Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 3.03.
Material Modification to Rights of Security Holders.
​
To the extent required by Item 3.03 of Form 8-K, the information contained in Item 5.03 of this Current Report on Form 8-K is incorporated herein by reference.

Item 5.03.
Amendment to Articles of Incorporation or Bylaws, Change in Fiscal Year.
 
As previously disclosed, on August 4, 2025, the Company held a special meeting of stockholders (the “Special Meeting”). At the Special Meeting, the stockholders approved a proposal to amend the Company’s Fourth Amended and Restated Certificate of Incorporation, as amended (the “Certificate of Incorporation”), to effect a reverse stock split of its outstanding common stock at a ratio in the range of one-for-five to one-for-seventy, to be determined at the discretion of the Board of Directors of the Company (the “Board”).

On June 16, 2026, the Board approved a one-for-thirty-five reverse stock split of the Company’s issued and outstanding shares of common stock (the “Reverse Stock Split”). On June 23, 2026, the Company filed with the Secretary of State of the State of Delaware a Certificate of Amendment to its Certificate of Incorporation (the “Certificate of Amendment”) to effect the Reverse Stock Split. The Reverse Stock Split will become effective as of 5:00 p.m. Eastern Time on June 25, 2026, and the Company’s common stock will begin trading on a split-adjusted basis when the market opens on June 26, 2026.

When the Reverse Stock Split becomes effective, every 35 shares of the Company’s issued and outstanding common stock (and such shares held in treasury) will automatically be converted into one share of common stock, without any change in the par value per share. In addition, a proportionate adjustment will be made to the per share exercise price and the number of shares issuable upon the conversion of the Company’s outstanding shares of preferred stock and exercise of all outstanding stock options, restricted stock units and warrants to purchase shares of common stock and the number of shares reserved for issuance pursuant to the Company’s equity incentive compensation plans. Any fraction of a share of common stock that would be created as a result of the Reverse Stock Split will be rounded down to the next whole share and the stockholder will receive cash equal to the market value of the fractional share, determined by multiplying such fraction by the closing sales price of the Company’s common stock as reported on Nasdaq on the last trading day before the Reverse Stock Split becomes effective.

The Company’s common stock will continue to trade on the Nasdaq Capital Market under the symbol “NUWE.” The new CUSIP number for common stock following the Reverse Stock Split will be 67113Y801.  Equiniti Trust Company, LLC, the Company’s transfer agent, will act as the exchange agent for the Reverse Stock Split.

For more information about the Reverse Stock Split, see the Company’s Definitive Proxy Statement on Schedule 14A, which was filed with the Securities and Exchange Commission and mailed to the Company’s stockholders on or about July 14, 2025, the relevant portions of which are incorporated herein by reference. A copy of the Certificate of Amendment is attached as Exhibit 3.1 hereto and incorporated herein by reference.
 
Item 9.01
Exhibits.

(d) Exhibits

Exhibit Number
Description
   
Certificate of Amendment to Fourth Amended and Restated Certificate of Incorporation, as amended, of Nuwellis, Inc.
104
Cover Page Interactive Data File (embedded within Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: June 23, 2026
NUWELLIS, INC.
   
 
By:
/s/ John L. Erb
  
 
Name:
John L. Erb
 
Title:
President and Chief Executive Officer


Exhibit 3.1


CERTIFICATE OF
AMENDMENT TO THE
FOURTH AMENDED AND
RESTATED CERTIFICATE OF
INCORPORATION OF
NUWELLIS, INC.

NUWELLIS, INC. (the “Corporation”), a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the “DGCL”), does hereby certify that:

FIRST: The name of the Corporation is Nuwellis, Inc. and the date on which the Fourth Amended and Restated Certificate of Incorporation of the Corporation was originally filed with the Secretary of State of the State of Delaware was September 20, 2011 (the “Fourth Amended and Restated Certificate of Incorporation”);

SECOND: The Board of Directors of the Corporation has duly adopted resolutions proposing and declaring advisable that the Fourth Amended and Restated Certificate of Incorporation be amended as set forth herein and calling for the consideration and approval thereof at a meeting of the stockholders of the Corporation;

THIRD: The Fourth Amended and Restated Certificate of Incorporation is hereby amended by deleting the Paragraph A of ARTICLE IV in its entirety and inserting the following in lieu thereof:

 
“The Corporation is authorized to issue two classes of stock to be designated, respectively, “Common Stock” and “Preferred Stock”. The total number of shares that the Corporation is authorized to issue is One Hundred Forty Million (140,000,000) shares, each with a par value of $0.0001 per share. One Hundred Million (100,000,000) shares shall be Common Stock and Forty Million (40,000,000) shares shall be Preferred Stock. Upon the filing and effectiveness (the “Effective Time”) pursuant to the General Corporation Law of the State of Delaware (the “DGCL”) of this Certificate of Amendment to the Fourth Amended and Restated Certificate of Incorporation of the Corporation, as previously amended (the “Restated Certificate”), each thirty-five (35) shares of the Corporation’s Common Stock issued and outstanding immediately prior to the Effective Time shall, automatically and without any action on the part of the Corporation or respective holders thereof, be combined and converted into one (1) validly issued, fully paid and non-assessable share of Common Stock (the “Reverse Split”); provided, however, that the Corporation shall issue no fractional shares as a result of the actions set forth herein but shall instead pay to the holder of such fractional share a sum in cash equal to such fraction multiplied by the closing sales price of the Common Stock as reported on The Nasdaq Capital Market on the last trading day before the Effective Time (as adjusted to give effect to the Reverse Split).”
  

FOURTH: Pursuant to a resolution of Board of Directors of the Corporation, this Certificate of Amendment was submitted to the stockholders of the Company for their approval, and was duly adopted in accordance with the provisions of Section 242 of the DGCL.

FIFTH: This Certificate of Amendment to the Fourth Amended and Restated Certificate of Incorporation shall have an Effective Time of June 25, 2026 at 5:00 p.m. Eastern Time.

IN WITNESS WHEREOF, Nuwellis, Inc. has caused this Certificate of Amendment to be executed by its duly authorized officer on this 23rd day of June, 2026.

 
 NUWELLIS, INC.
 
 
 
 
 
 
 By:  /s/ John L. Erb
 
 
 
 By: John L. Erb
 
 
 
 Name: President & Chief Executive Officer