SANUWAVE Health, Inc.
SNWV- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001417663
No open-market purchases or sales by SANUWAVE Health, Inc. insiders were filed in the last 90 days; 49 institutions reported holding it in 13F filings for Q2 2026, worth $32.0M in total; no superinvestor holds it.
Holders of 5% or more of SNWV
Holders whose latest Schedule 13D or 13G filing reports 5% or more of SANUWAVE Health, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Manchester Management Co LLC | 13D/A | 10.80%930.0K shares | −0.30 ppfrom 11.10% | Sep 24, 202115 filings | Dec 15, 2025 | SEC |
| Solas Capital Management, LLC | 13G/A | 7.10%611.0K shares | +3.60 ppfrom 3.50% | Nov 14, 20245 filings | Aug 14, 2026 | SEC |
| AWM Investment Company, Inc. | 13G/A | 6.00%513.2K shares | −1.10 ppfrom 7.10% | Feb 13, 20252 filings | May 9, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
33 Schedule 13D and 13G filings on SANUWAVE Health, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 202611:00 AM ET | Solas Capital Management, LLCand 1 other | 13G/A | 7.10%611.0K shares | +3.60 ppfrom 3.50% | Jun 30, 2026 | SEC |
| Jul 31, 20264:05 PM ET | Opaleye Management Inc.and 2 others | 13G/A | 3.60%309.9K shares | −6.39 ppfrom 9.99%Below 5% | Jun 30, 2026 | SEC |
| Jul 30, 202611:18 AM ET | BlackRock, Inc. | 13G/A | 1.50%132.1K shares | −4.10 ppfrom 5.60%Below 5% | Jun 30, 2026 | SEC |
| May 4, 20264:05 PM ET | Opaleye Management Inc.and 2 others | 13G/A | 9.99%858.6K shares | – | May 1, 2026 | SEC |
| Mar 27, 20261:00 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −5.19 ppfrom 5.19%Below 5% | Mar 13, 2026 | SEC |
| Dec 15, 20255:27 PM ET | Manchester Management Co LLCand 4 others | 13D/A | 10.80%930.0K shares | −0.30 ppfrom 11.10% | Dec 11, 2025 | SEC |
| Dec 10, 20259:58 PM ET | Manchester Management Co LLCand 4 others | 13D/A | 11.10%948.0K shares | – | Dec 8, 2025 | SEC |
| Oct 17, 20256:24 PM ET | BlackRock, Inc. | 13G | 5.60%476.2K shares | New | Sep 30, 2025 | SEC |
| Aug 14, 20253:57 PM ET | Solas Capital Management, LLCand 1 other | 13G/A | 3.50%296.7K shares | −3.30 ppfrom 6.80%Below 5% | Jun 30, 2025 | SEC |
| Jul 29, 20252:31 PM ET | Vanguard Group Inc | 13G | 5.19%444.8K shares | New | Jun 30, 2025 | SEC |
| May 15, 202511:23 AM ET | Solas Capital Management, LLCand 1 other | 13G/A | 6.80%584.0K shares | −1.60 ppfrom 8.40% | Mar 31, 2025 | SEC |
| May 9, 20253:11 PM ET | AWM Investment Company, Inc. | 13G/A | 6.00%513.2K shares | −1.10 ppfrom 7.10% | May 9, 2025 | SEC |
| Feb 14, 20251:07 PM ET | Solas Capital Management, LLCand 1 other | 13G/A | 8.40%713.8K shares | −1.50 ppfrom 9.90% | Dec 31, 2024 | SEC |
| Feb 13, 20254:13 PM ET | AWM Investment Company, Inc. | 13G | 7.10%606.1K shares | New | Dec 31, 2024 | SEC |
| Nov 14, 20243:29 PM ET | Solas Capital Management, LLCand 1 other | 13G | 9.90%121.1M shares | New | Sep 30, 2024 | SEC |
| Oct 22, 2024 | Opaleye Management Inc. | 13G/AOld format | – | – | – | SEC |
| Oct 22, 2024 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Jun 24, 2024 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Opaleye Management Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 12, 2024 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Jan 4, 2024 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Nov 22, 2023 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Aug 23, 2023 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Aug 10, 2023 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Jul 27, 2023 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| May 16, 2023 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Feb 13, 2023 | Opaleye Management Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 13, 2023 | Manchester Management Co LLC | 13D/AOld format | – | – | – | SEC |
| Aug 11, 2022 | Manchester Management Co LLC | 13DOld format | – | – | – | SEC |
| Feb 10, 2022 | Manchester Management Co LLC | 13G/AOld format | – | – | – | SEC |
| Jan 26, 2022 | Opaleye Management Inc. | 13G/AOld format | – | – | – | SEC |
| Sep 24, 2021 | Manchester Management Co LLC | 13GOld format | – | New | – | SEC |
| Feb 12, 2021 | Opaleye Management Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
1 notice from officers, directors and other affiliates planning to sell SANUWAVE Health, Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Jun 25, 20259:34 AM ET | Stolarski Anthony MichaelDirector | 155.4K | $5.06M | Jun 25, 2025 | Vanguard Marketing Corporation | SEC |