Who owns Alpha Cognition Inc. Common Stock (ACOG)
Which tracked institutional funds hold ACOG, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACOG company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-14). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on ACOG is one-sided between 2026-Q1 and 2026-Q2: 7 added or opened and 0 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ACOG’s largest tracked holder by dollar value, Opaleye Management Inc., sizes it at 1.9% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.9pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ACOG divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 26 tracked filers holding ACOG, 7 increased or opened the position and 5 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ACOG between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
Largest adds
- Opaleye Management Inc.$7M
- Solas Capital Management, LLC$3M
- AWM Investment Company, Inc.$3M
- Cable Car Capital, LP$2M
- SPHERA FUNDS MANAGEMENT LTD.$825K
- Alyeska Investment Group, L.P.$631K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Opaleye Management Inc. added | 2,895,467 | $21M | 25.8% | 2026-Q2 |
| Solas Capital Management, LLC | 1,924,617 | $14M | 17.2% | 2026-Q2 |
| AWM Investment Company, Inc. | 1,672,168 | $12M | 14.9% | 2026-Q2 |
| Cable Car Capital, LP | 1,382,339 | $10M | 12.3% | 2026-Q2 |
| Ikarian Capital, LLC trimmed | 836,259 | $6M | 7.5% | 2026-Q2 |
| SPHERA FUNDS MANAGEMENT LTD. trimmed | 545,816 | $4M | 4.9% | 2026-Q2 |
| Alyeska Investment Group, L.P. | 365,000 | $3M | 3.3% | 2026-Q2 |
| Aristides Capital LLC | 218,510 | $2M | 2.0% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 189,148 | $1M | 1.7% | 2026-Q2 |
| CANTOR FITZGERALD, L. P. trimmed | 108,918 | $786K | 1.0% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 97,546 | $704K | 0.9% | 2026-Q2 |
| VILLERE ST DENIS J & CO LLC | 71,158 | $514K | 0.6% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL | 61,596 | $445K | 0.5% | 2026-Q2 |
| ACT CAPITAL MANAGEMENT, LLC | 51,500 | $372K | 0.5% | 2026-Q2 |
| BERKSHIRE ASSET MANAGEMENT LLC/PA | 19,824 | $143K | 0.2% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 18,832 | $136K | 0.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC | 11,992 | $87K | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC | 10,000 | $72K | 0.1% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ | 5,292 | $38K | 0.0% | 2026-Q2 |
| UBS Group AG added | 1,456 | $11K | 0.0% | 2026-Q2 |
| Allworth Financial LP | 750 | $5K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 250 | $2K | 0.0% | 2026-Q2 |
| Steward Partners Investment Advisory, LLC | 200 | $1K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 200 | $1K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 122 | $1K | 0.0% | 2026-Q2 |
| HARBOUR INVESTMENTS, INC. added | 47 | $336 | 0.0% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 53,203 | $346K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 34,706 | $226K | 0.3% | 2025-Q4 stale (2 quarters behind) |
| Quadrature Capital Ltd trimmed | 12,501 | $81K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| Green Alpha Advisors, LLC new | 11,126 | $72K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| PNC Financial Services Group, Inc. | 120 | $780 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| CORSAIR CAPITAL MANAGEMENT, L.P. | 134,898 | $878K | 1.1% | 2025-Q3 stale (3 quarters behind) |
| Connective Capital Management, LLC new | 47,931 | $312K | 0.4% | 2025-Q3 stale (3 quarters behind) |
| SALEM INVESTMENT COUNSELORS INC | 45,402 | $296K | 0.4% | 2025-Q3 stale (3 quarters behind) |
| Zullo Investment Group, Inc. new | 19,500 | $127K | 0.2% | 2025-Q3 stale (3 quarters behind) |
| MILLENNIUM MANAGEMENT LLC added | 17,250 | $112K | 0.1% | 2025-Q3 stale (3 quarters behind) |
| Tower Research Capital LLC (TRC) new | 1,648 | $11K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Bleichroeder LP trimmed | 138,919 | $1M | 1.6% | 2025-Q2 stale (4 quarters behind) |
| Manatuck Hill Partners, LLC added | 117,000 | $1M | 1.3% | 2025-Q2 stale (4 quarters behind) |
| WEXFORD CAPITAL LP new | 16,666 | $155K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| Massar Capital Management, LP new | 12,433 | $116K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| BlackRock, Inc. new | 5,443 | $51K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.