SANUWAVE Health, Inc.
SANUWAVE Health, Inc. (SNWV) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SNWV · as of Sep 30, 2025
Ownership Breakdown
59
Institutional Holders
▲ 13 vs Q2
$127.26M
Total Inst. Value
▲ $20.94M vs Q2
8.60M
Shares Outstanding
freeFloat 94.58%
3.39M
13F Shares Held
▲ 159,526 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SNWV largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
OPALEYE MANAGEMENT INC. surgical & medical instruments & apparatus | 980.0K | 11.45% | 11.45% | $36.73B | Nov 14, 2025 | — held |
BLACKROCK, INC. surgical & medical instruments & apparatus | 477.2K | 5.57% | 5.57% | $17.89B | Nov 12, 2025 | ▲ 106.6K |
AWM INVESTMENT COMPANY, INC. surgical & medical instruments & apparatus | 454.6K | 5.31% | 5.31% | $17.04B | Nov 13, 2025 | ▼ 35.0K |
VANGUARD GROUP INC surgical & medical instruments & apparatus | 440.3K | 5.14% | 5.14% | $16.50B | Nov 7, 2025 | ▼ 4.5K |
SOLAS CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 201.3K | 2.35% | 2.35% | $7.54B | Nov 14, 2025 | ▼ 95.4K |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 161.9K | 1.89% | 1.89% | $6.07B | Nov 12, 2025 | ▲ 4.2K |
STATE STREET CORP surgical & medical instruments & apparatus | 137.8K | 1.61% | 1.61% | $5.17B | Nov 14, 2025 | ▲ 72.1K |
CENTERBOOK PARTNERS LP surgical & medical instruments & apparatus | 87.9K | 1.03% | 1.03% | $3.30B | Nov 7, 2025 | ▲ 74.0K |
GOLDMAN SACHS GROUP INC surgical & medical instruments & apparatus | 69.8K | 81.51% | 81.51% | $2.62B | Nov 14, 2025 | ▲ 69.8K |
NORTHERN TRUST CORP surgical & medical instruments & apparatus | 61.8K | 72.19% | 72.19% | $2.32B | Nov 14, 2025 | ▼ 333 |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
17
Increased
+338.1K shares7
New Positions
first time holders14
Decreased
−194.8K shares0
Sold Out
fully exitedNet shares change (top 50)
+143.3K
+338.1K / −194.8K
Net new holders
+10
7 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SNWV insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
7
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Opaleye Management Inc. 10 percent owner | Apr 30, 2026 | Sale | 24,000 | $16.15 | $387.6K | 863.6K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 1, 2026 | Sale | 10,081 | $16.11 | $162.4K | 853.6K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | Apr 30, 2026 | Sale | 1,000 | $16.15 | $16.2K | 5.5K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 1, 2026 | Sale | 500 | $16.11 | $8.1K | 5.0K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | Apr 28, 2026 | Sale | 43,788 | $18.47 | $808.7K | 911.0K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | Apr 29, 2026 | Sale | 23,360 | $17.25 | $402.9K | 887.6K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | Apr 28, 2026 | Sale | 2,500 | $18.47 | $46.2K | 7.5K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | Apr 29, 2026 | Sale | 1,000 | $17.25 | $17.2K | 6.5K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | Apr 17, 2026 | Sale | 11,267 | $20.46 | $230.5K | 955.0K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | Apr 21, 2026 | Sale | 202 | $20.50 | $4.1K | 954.8K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
SANUWAVE Health, Inc. (SNWV) is primarily owned by institutional investors, who hold approximately 39.4% of total shares outstanding. Company insiders own approximately 5.42%, while retail and public investors account for the remaining 55.19%.
The largest institutional shareholder of SANUWAVE Health, Inc. is OPALEYE MANAGEMENT INC., holding approximately 980,000 shares — equal to 11.45% of outstanding shares — as of September 30, 2025.
A total of 59 institutional investors currently hold SNWV stock, with a combined institutional value of approximately $127,262,877 as of the most recent 13F filing period.
Frequently asked questions
SNWV ownershipSANUWAVE Health, Inc. (SNWV) is primarily owned by institutional investors, who hold approximately 39.4% of shares. The largest shareholder is OPALEYE MANAGEMENT INC. with a 11.45% stake. Company insiders hold 5.42%. Data sourced from SEC Form 13F as of September 30, 2025.