Sec Form 4/A Filing - MANCHESTER MANAGEMENT CO LLC @ SANUWAVE Health, Inc. - 2025-12-08

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person MANCHESTER MANAGEMENT CO LLC 2. Issuer Name and Ticker or Trading Symbol SANUWAVE Health, Inc. [ SNWV] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) Director by Deputization (Last) (First) (Middle) 2 CALLE CANDINA, #1701 3. Date of Earliest Transaction (MM/DD/YY) 12/08/2025 (Street) SAN JUAN, PR00907 4. If Amendment, Date Original Filed (MM/DD/YY) 12/10/2025 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.001 12/08/2025 S 125,400 D $ 30.75 881,390 I See footnote ( 1 ) Common Stock, par value $0.001 12/09/2025 S 8,785 D $ 30.5838 ( 2 ) 872,605 I See footnote ( 1 ) Common Stock, par value $0.001 12/10/2025 S 8,625 D $ 30.3918 ( 3 ) 863,980 I See footnote ( 1 ) Common Stock, par value $0.001 12/08/2025 S 2,000 D $ 31.6017 ( 5 ) 2,000 D ( 4 ) Common Stock, par value $0.001 83,999 I See footnote ( 6 ) Common Stock, par value $0.001 52,653 D ( 7 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other MANCHESTER MANAGEMENT CO LLC 2 CALLE CANDINA, #1701 SAN JUAN, PR00907 Director by Deputization Manchester Explorer, L.P. 2 CALLE CANDINA, #1701 SAN JUAN, PR00907 Director by Deputization MANCHESTER MANAGEMENT PR, LLC 2 CALLE CANDINA, #1701 SAN JUAN, PR00907 Director by Deputization FRANK MORGAN C. 2 CALLE CANDINA, #1701 SAN JUAN, PR00907 X Director by Deputization BESSER JAMES E 2 CALLE CANDINA, #1701 SAN JUAN, PR00907 Director by Deputization Signatures Manchester Management Company, LLC, By: /s/ James E. Besser, Managing Member 12/11/2025 Signature of Reporting Person Date Manchester Explorer, L.P., By: /s/ James E. Besser, Managing Member of the General Partner 12/11/2025 Signature of Reporting Person Date Manchester Management PR, LLC, By: /s/ James E. Besser, Managing Member 12/11/2025 Signature of Reporting Person Date Morgan C. Frank, By: /s/ Morgan C. Frank 12/11/2025 Signature of Reporting Person Date James E. Besser, By: /s/ James E. Besser 12/11/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reported securities are owned directly by Manchester Explorer, L.P. ("Explorer") and may be deemed to be indirectly beneficially owned by (i) Manchester Management Company, LLC ("Manchester Management"), the general partner of Explorer, (ii) Manchester Management PR, LLC ("Manchester PR"), the investment adviser to Manchester Management, (iii) James E. Besser, the managing member of Manchester Management and Manchester PR, and (iv) Morgan Frank, who serves as a portfolio manager and as a consultant for Explorer. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. ( 2 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $30.00 to $31.71. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. ( 3 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $30.01 to $30.90. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. ( 4 )The reported securities are directly owned by James E. Besser in his personal capacity. ( 5 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $29.88 to $33.50. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. ( 6 )The reported securities are owned directly by JEB Partners, L.P. ("JEB Partners") and may be deemed to be indirectly beneficially owned by (i) Manchester Management, the general partner of JEB Partners, (ii) Manchester PR, the investment adviser to Manchester Management, and (iii) James E. Besser, the managing member of Manchester Management and Manchester PR. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. ( 7 )The reported securities and warrants are directly owned by Morgan C. Frank in his personal capacity.

Remarks: This Form 4/A is being filed to correct a typographical error in the Explanation of Responses section of the Form 4 filed by the Reporting Persons on December 10, 2025.

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).

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