Alpha Cognition Inc (ACOG) Ownership
ACOG ownership summary
as of October 18, 2026- Institutions
- 56.8% of shares outstanding
- Insiders
- 5.13% of shares outstanding
- Shares outstanding
- 21.8M
- Float
- 10.8M shares available to trade
- Short interest
- 1.86% 323K shares short
- Days to cover
- 2.88 short interest up 54.6% vs prior month
- Institutions 56.80%
- Insiders 5.13%
- Other investors 38.06%
ACOG top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Opaleye Management Inc | 13.30% | 2.9M | $23.7M | +333,517 (+13.0%) | June 30, 2026 |
| 2 | Solas Capital Management LLC | 8.84% | 1.9M | $15.8M | — | June 30, 2026 |
| 3 | Awm Investment Company Inc | 7.68% | 1.7M | $13.7M | — | June 30, 2026 |
| 4 | Cable Car Capital LLC | 6.35% | 1.4M | $11.3M | — | June 30, 2026 |
| 5 | Ikarian Capital, LLC | 3.84% | 836K | $6.8M | −220,000 (−20.8%) | June 30, 2026 |
| 6 | Sphera Funds Management Ltd. | 2.51% | 546K | $4.5M | −21,800 (−3.8%) | June 30, 2026 |
| 7 | Alyeska Investment Group, L.P. | 1.68% | 365K | $3.0M | — | June 30, 2026 |
| 8 | Aristides Capital LLC | 1.00% | 219K | $1.8M | — | June 30, 2026 |
| 9 | CANTOR FITZGERALD, L. P. | 1.00% | 218K | $1.8M | +29,205 (+15.5%) | June 30, 2026 |
| 10 | BOOTHBAY FUND MANAGEMENT, LLC | 0.87% | 189K | $1.5M | −67,245 (−26.2%) | June 30, 2026 |
| 11 | Citadel Advisors Llc | 0.45% | 98K | $798,902 | +7,957 (+8.9%) | June 30, 2026 |
| 12 | Villere St Denis J & Co Llc | 0.33% | 71K | $582,784 | — | June 30, 2026 |
| 13 | Tudor Investment Corp Et AL | 0.28% | 62K | $504,471 | — | June 30, 2026 |
| 14 | ACT Capital Management, LLC | 0.24% | 52K | $421,785 | — | June 30, 2026 |
| 15 | Berkshire Asset Management Inc | 0.09% | 20K | $162,359 | — | June 30, 2026 |
| 16 | Two Sigma Investments LLC | 0.09% | 19K | $154,234 | +2,946 (+18.5%) | June 30, 2026 |
| 17 | Geode Capital Management, LLC | 0.06% | 12K | $98,214 | — | June 30, 2026 |
| 18 | NATIONAL BANK OF CANADA /FI/ | 0.02% | 5,292 | $43,341 | — | June 30, 2026 |
| 19 | UBS Group AG | 0.01% | 1,456 | $11,925 | +1,018 (+232.4%) | June 30, 2026 |
| 20 | Hanson Mcclain Inc | <0.01% | 750 | $6,142 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 5 holders added 375K shares and 3 cut 309K.
ACOG top mutual fund and ETF holders
9 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | 1290 Essex Small Cap Growth I | 0.50% | 108K | $884,438 | +107,990 (0.0%) | August 31, 2026 |
| 2 | Fidelity Nasdaq Composite Index | 0.07% | 14K | $117,174 | — | August 31, 2026 |
| 3 | Avantis US Small Cap Equity ETF | 0.04% | 8,528 | $69,844 | +180 (+2.2%) | September 30, 2026 |
| 4 | Dimensional Global Core Equity USD Acc | 0.01% | 2,897 | $23,726 | +1,267 (+77.7%) | August 31, 2026 |
| 5 | Dimensional International Core Eq Acc | 0.01% | 2,477 | $20,287 | +2,477 (0.0%) | August 31, 2026 |
| 6 | DFA US Vector Equity Class F | 0.01% | 1,796 | $14,709 | — | July 31, 2026 |
| 7 | Dimensional World Allc 60/40 GBP Acc | 0.01% | 1,740 | $14,251 | +1,740 (0.0%) | August 31, 2026 |
| 8 | Dimensional Gl Cor Eq LC ESG Sc USD A | 0.01% | 1,725 | $14,128 | — | August 31, 2026 |
| 9 | Dimensional World Equity GBP Acc | 0.01% | 1,206 | $9,877 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ACOG insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-08-18 | Phillip Joseph Mertz | Sell | $9.00 | 27,778 | $250,002 |
| 2025-08-18 | Robert James Wills | Buy | $8.49 | 15,000 | $127,350 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ACOG shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ACOG
Institutional investors own 56.8% of Alpha Cognition's shares and insiders 5.13%. The largest holder is Opaleye Management Inc with 13.30% of the shares (2.9M), as of June 30, 2026. Among the top 20 institutions, 5 added shares and 3 reduced their stake in the latest filings. Short interest is 1.86% of the float, or 2.88 days of average trading volume. The share count rose 55,741.7% since 2018.
Related: ACOG analyst forecast, ACOG key metrics. See the ACOG stock overview for the latest quote and news.
ACOG ownership FAQ
Who owns the most Alpha Cognition stock?
The largest shareholders of Alpha Cognition are Opaleye Management Inc (13.30%), Solas Capital Management LLC (8.84%), Awm Investment Company Inc (7.68%), Cable Car Capital LLC (6.35%), Ikarian Capital, LLC (3.84%).
What percentage of Alpha Cognition is owned by institutions?
Institutions hold 56.8% of Alpha Cognition's shares outstanding; insiders hold 5.13%.
Which funds own Alpha Cognition?
The largest fund holders of Alpha Cognition are 1290 Essex Small Cap Growth I (0.50%), Fidelity Nasdaq Composite Index (0.07%), Avantis US Small Cap Equity ETF (0.04%), Dimensional Global Core Equity USD Acc (0.01%), Dimensional International Core Eq Acc (0.01%).
What is Alpha Cognition's short interest?
323K shares of Alpha Cognition were sold short, 1.86% of the float; at the average daily volume it would take 2.88 days to cover.
Are insiders buying or selling Alpha Cognition?
Of the latest 2 reported insider transactions in Alpha Cognition (since August 18, 2025), 1 were purchases and 1 were sales.
How many shares of Alpha Cognition are outstanding?
Alpha Cognition has 21.8M shares outstanding, of which 10.8M are in the public float.