Company: SNWV
Filing Date: 2025-08-22
Form Type: S-8
Source: 0001628280-25-041027
Chunk: 1

Company: SANUWAVE Health, Inc.
Filing Date: 2025-08-22
Form: S-8
Chunk 1
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 elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

### EXPLANATORY NOTE
Pursuant to General Instruction E of Form S-8, this Registration Statement is filed to register an additional 500,000 shares of common stock, $0.001 par value per share (“Common Stock”), of SANUWAVE Health, Inc. (the “Company”) reserved for issuance under the Company’s 2024 Equity Incentive Plan, as amended and restated as of August 19, 2025 (the “Plan”). Shares of the Company’s Common Stock issuable under the Plan were previously registered pursuant to a Registration Statement on Form S-8 (No. 333-282726) filed with the Securities and Exchange Commission (the “Commission”) on October 18, 2024 . Such Registration Statement is currently effective and the contents thereof are incorporated herein by reference except to the extent that such content is superseded by the items appearing below.

# PART I
<div align='center'>INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS</div>

The documents containing the information specified in Part I of Form S-8 are not required to be filed with the Commission either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to the introductory Note to Part I of Form S-8 and Rule 424 under the Securities Act of 1933, as amended (the “Securities Act”). The documents containing the information specified in Part I will be sent or given to participants as specified by Rule 428(b)(1) of the Securities Act. Such documents and the documents incorporated by reference in this Registration Statement pursuant to Item 3 of Part II hereof, taken together, constitute a prospectus that meets the requirements of Section 10(a) of the Securities Act.

# PART II

### INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
| Item 3. |     | Incorporation of Documents by Reference. |

The following documents filed by the Company with the Commission are hereby incorporated by reference into this Registration Statement:

• the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the Commission on March 20, 2025 ;

• the Company’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025 and June 30, 202