Soleno Therapeutics, Inc.
Soleno Therapeutics, Inc. (SLNO) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SLNO · as of Sep 30, 2025
Ownership Breakdown
282
Institutional Holders
▲ 22 vs Q2
$4.40B
Total Inst. Value
▼ $350.49M vs Q2
52.12M
Shares Outstanding
freeFloat 98.72%
65.23M
13F Shares Held
▲ 8.48M 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
SLNO largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
FMR LLC electromedical & electrotherapeutic apparatus | 8.00M | 15.85% | 15.85% | $540.78B | Nov 13, 2025 | ▲ 4.66M |
JANUS HENDERSON GROUP PLC electromedical & electrotherapeutic apparatus | 6.06M | 12.00% | 12.00% | $409.50B | Nov 14, 2025 | ▲ 748.3K |
PRICE T ROWE ASSOCIATES INC /MD/ electromedical & electrotherapeutic apparatus | 3.90M | 7.73% | 7.73% | $263.84B | Nov 14, 2025 | ▲ 441.4K |
BLACKROCK, INC. electromedical & electrotherapeutic apparatus | 3.49M | 6.92% | 6.92% | $236.08B | Nov 12, 2025 | ▲ 647.5K |
VANGUARD GROUP INC electromedical & electrotherapeutic apparatus | 2.81M | 5.56% | 5.56% | $189.76B | Nov 7, 2025 | ▲ 319.3K |
AVORO CAPITAL ADVISORS LLC electromedical & electrotherapeutic apparatus | 2.58M | 5.11% | 5.11% | $174.26B | Nov 14, 2025 | ▲ 527.8K |
WELLINGTON MANAGEMENT GROUP LLP electromedical & electrotherapeutic apparatus | 2.31M | 4.58% | 4.58% | $156.30B | Nov 14, 2025 | ▲ 1.69M |
VIVO CAPITAL, LLC electromedical & electrotherapeutic apparatus | 2.28M | 4.51% | 4.51% | $154.01B | Nov 14, 2025 | ▼ 1.68M |
STATE STREET CORP electromedical & electrotherapeutic apparatus | 2.17M | 4.30% | 4.30% | $146.90B | Nov 14, 2025 | ▲ 768.1K |
INVESCO LTD. electromedical & electrotherapeutic apparatus | 1.50M | 2.97% | 2.97% | $101.44B | Nov 13, 2025 | ▲ 854.6K |
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
33
Increased
+15.95M shares5
New Positions
first time holders11
Decreased
−6.32M shares0
Sold Out
fully exitedNet shares change (top 50)
+9.62M
+15.95M / −6.32M
Net new holders
+27
5 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
SLNO insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
71
Sell transactions
0.00
Buy/Sell ratio
$2M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 37,639 | — | — | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 1,741 | $44.25 | $77.0K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 4,999 | $24.00 | $120.0K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 4,000 | $25.05 | $100.2K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 666 | $51.15 | $34.1K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 18,800 | $33.60 | $631.7K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 2,445 | $5.10 | $12.5K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 11,667 | $2.41 | $28.1K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 55,392 | $5.25 | $290.8K | 0 | Form 4 ↗ |
Yen Kristen SEE REMARKS | May 18, 2026 | D-Return | 16,000 | $36.70 | $587.2K | 0 | 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
Soleno Therapeutics, Inc. (SLNO) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 1.28%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Soleno Therapeutics, Inc. is FMR LLC, holding approximately 8.00 million shares — equal to 15.85% of outstanding shares — as of September 30, 2025.
A total of 282 institutional investors currently hold SLNO stock, with a combined institutional value of approximately $4.40 billion as of the most recent 13F filing period.
Frequently asked questions
SLNO ownershipSoleno Therapeutics, Inc. (SLNO) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is FMR LLC with a 15.85% stake. Company insiders hold 1.28%. Data sourced from SEC Form 13F as of September 30, 2025.