Alpha Cognition Inc. Common Stock
Alpha Cognition Inc. Common Stock (ACOG) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ACOG · as of Sep 30, 2025
Ownership Breakdown
28
Institutional Holders
▲ 2 vs Q2
$36.74M
Total Inst. Value
▼ $16.62M vs Q2
15.53M
Shares Outstanding
freeFloat 78.02%
5.64M
13F Shares Held
▼ 75,918 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
ACOG largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
SOLAS CAPITAL MANAGEMENT, LLC biological products, (no diagnostic substances) | 1.28M | 8.00% | 8.00% | $8.35B | Nov 14, 2025 | ▲ 6.2K |
AWM INVESTMENT COMPANY, INC. biological products, (no diagnostic substances) | 1.10M | 6.84% | 6.84% | $7.13B | Nov 13, 2025 | — held |
IKARIAN CAPITAL, LLC biological products, (no diagnostic substances) | 946.3K | 5.91% | 5.91% | $6.16B | Nov 14, 2025 | ▲ 28.4K |
CABLE CAR CAPITAL LLC biological products, (no diagnostic substances) | 869.0K | 5.42% | 5.42% | $5.66B | Nov 14, 2025 | — held |
SPHERA FUNDS MANAGEMENT LTD. biological products, (no diagnostic substances) | 338.8K | 2.11% | 2.11% | $2.21B | Nov 14, 2025 | ▼ 37.9K |
BOOTHBAY FUND MANAGEMENT, LLC biological products, (no diagnostic substances) | 291.9K | 1.82% | 1.82% | $1.90B | Nov 14, 2025 | ▲ 28.4K |
ARISTIDES CAPITAL LLC biological products, (no diagnostic substances) | 165.5K | 1.03% | 1.03% | $1.08B | Nov 13, 2025 | — held |
CORSAIR CAPITAL MANAGEMENT, L.P. biological products, (no diagnostic substances) | 134.9K | 84.20% | 84.20% | $878.19M | Apr 21, 2026 | — held |
OPALEYE MANAGEMENT INC. biological products, (no diagnostic substances) | 115.1K | 71.87% | 71.87% | $749.57M | Nov 14, 2025 | NEW |
MARSHALL WACE, LLP biological products, (no diagnostic substances) | 72.2K | 45.07% | 45.07% | $470.10M | Nov 13, 2025 | ▲ 7.9K |
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
8
Increased
+78.6K shares7
New Positions
first time holders4
Decreased
−84.9K shares5
Sold Out
fully exitedNet shares change (top 50)
6.2K
+78.6K / −84.9K
Net new holders
+6
7 new / 5 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ACOG insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
10
Buy transactions
0
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 | May 29, 2026 | Purchase | 70,577 | $5.90 | $416.4K | 2.60M | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 28, 2026 | Purchase | 2,000 | $5.83 | $11.7K | 2.53M | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 27, 2026 | Purchase | 1,161 | $5.73 | $6.7K | 2.53M | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 21, 2026 | Purchase | 15,945 | $5.70 | $90.9K | 2.53M | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 20, 2026 | Purchase | 8,431 | $5.89 | $49.7K | 2.51M | Form 4 ↗ |
D'Angelo Lauren Chief Operating Officer | May 19, 2026 | Purchase | 3,500 | $5.76 | $20.2K | 140.7K | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 18, 2026 | Purchase | 17,395 | $5.69 | $99.0K | 2.51M | Form 4 ↗ |
Opaleye Management Inc. 10 percent owner | May 15, 2026 | Purchase | 16,648 | $5.83 | $97.0K | 2.49M | Form 4 ↗ |
Sensenig Bethany director | Apr 16, 2026 | Award | 6,991 | $6.65 | $46.5K | 7.0K | Form 4 ↗ |
Sensenig Bethany director | Apr 16, 2026 | Award | 5,489 | — | — | 5.5K | 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
Alpha Cognition Inc. Common Stock (ACOG) is primarily owned by institutional investors, who hold approximately 36.3% of total shares outstanding. Company insiders own approximately 21.98%, while retail and public investors account for the remaining 41.68%.
The largest institutional shareholder of Alpha Cognition Inc. Common Stock is SOLAS CAPITAL MANAGEMENT, LLC, holding approximately 1.28 million shares — equal to 8.00% of outstanding shares — as of September 30, 2025.
A total of 28 institutional investors currently hold ACOG stock, with a combined institutional value of approximately $36,736,714 as of the most recent 13F filing period.
Frequently asked questions
ACOG ownershipAlpha Cognition Inc. Common Stock (ACOG) is primarily owned by institutional investors, who hold approximately 36.3% of shares. The largest shareholder is SOLAS CAPITAL MANAGEMENT, LLC with a 8.00% stake. Company insiders hold 21.98%. Data sourced from SEC Form 13F as of September 30, 2025.