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-Q1 13F filings (latest filed 2026-05-15). 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 2025-Q4 and 2026-Q1: 2 added or opened and 8 trimmed or exited — on balance reducing.
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 1.8pp 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 2025-Q4 and 2026-Q1, across 25 tracked filers holding ACOG, 8 increased or opened the position and 10 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 2025-Q4 and 2026-Q1 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
- Cable Car Capital, LP$698K
- Opaleye Management Inc.$605K
Largest trims
- Solas Capital Management, LLC$2M
- AWM Investment Company, Inc.$2M
- Ikarian Capital, LLC$1M
- SPHERA FUNDS MANAGEMENT LTD.$573K
- Alyeska Investment Group, L.P.$369K
- TWO SIGMA INVESTMENTS, LP$287K
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 | 2,561,950 | $14M | 21.7% | 2026-Q1 |
| Solas Capital Management, LLC trimmed | 1,924,617 | $11M | 16.3% | 2026-Q1 |
| AWM Investment Company, Inc. | 1,672,168 | $9M | 14.2% | 2026-Q1 |
| Cable Car Capital, LP added | 1,382,339 | $8M | 11.7% | 2026-Q1 |
| Ikarian Capital, LLC | 1,056,259 | $6M | 8.9% | 2026-Q1 |
| SPHERA FUNDS MANAGEMENT LTD. | 567,616 | $3M | 4.8% | 2026-Q1 |
| Alyeska Investment Group, L.P. | 365,000 | $2M | 3.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC | 256,393 | $1M | 2.2% | 2026-Q1 |
| Aristides Capital LLC added | 218,510 | $1M | 1.8% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. added | 188,631 | $1M | 1.6% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 89,589 | $492K | 0.8% | 2026-Q1 |
| VILLERE ST DENIS J & CO LLC trimmed | 71,158 | $391K | 0.6% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL | 61,596 | $338K | 0.5% | 2026-Q1 |
| ACT CAPITAL MANAGEMENT, LLC | 51,500 | $283K | 0.4% | 2026-Q1 |
| BERKSHIRE ASSET MANAGEMENT LLC/PA | 19,824 | $109K | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 15,886 | $87K | 0.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC | 11,992 | $66K | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC new | 10,000 | $55K | 0.1% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ | 5,292 | $28K | 0.0% | 2026-Q1 |
| Allworth Financial LP | 750 | $4K | 0.0% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 679 | $4K | 0.0% | 2026-Q1 |
| UBS Group AG trimmed | 438 | $2K | 0.0% | 2026-Q1 |
| Steward Partners Investment Advisory, LLC | 200 | $1K | 0.0% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP trimmed | 100 | $508 | 0.0% | 2026-Q1 |
| HARBOUR INVESTMENTS, INC. new | 4 | $25 | 0.0% | 2026-Q1 |
| Bleichroeder LP trimmed | 138,919 | $1M | 2.0% | 2025-Q2 stale |
| Manatuck Hill Partners, LLC added | 117,000 | $1M | 1.7% | 2025-Q2 stale |
| Altium Capital Management LLC trimmed | 177,416 | $898K | 1.4% | 2025-Q1 stale |
| CORSAIR CAPITAL MANAGEMENT, L.P. | 134,898 | $878K | 1.4% | 2025-Q3 stale |
| Rosalind Advisors, Inc. trimmed | 104,836 | $530K | 0.8% | 2025-Q1 stale |
| MARSHALL WACE, LLP trimmed | 53,203 | $346K | 0.5% | 2025-Q4 stale |
| Connective Capital Management, LLC new | 47,931 | $312K | 0.5% | 2025-Q3 stale |
| SALEM INVESTMENT COUNSELORS INC | 45,402 | $296K | 0.5% | 2025-Q3 stale |
| MYDA Advisors LLC trimmed | 46,000 | $233K | 0.4% | 2025-Q1 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 34,706 | $226K | 0.3% | 2025-Q4 stale |
| HOHIMER WEALTH MANAGEMENT, LLC trimmed | 41,608 | $211K | 0.3% | 2025-Q1 stale |
| WEXFORD CAPITAL LP new | 16,666 | $155K | 0.2% | 2025-Q2 stale |
| Zullo Investment Group, Inc. new | 19,500 | $127K | 0.2% | 2025-Q3 stale |
| Massar Capital Management, LP new | 12,433 | $116K | 0.2% | 2025-Q2 stale |
| MILLENNIUM MANAGEMENT LLC added | 17,250 | $112K | 0.2% | 2025-Q3 stale |
| Quadrature Capital Ltd trimmed | 12,501 | $81K | 0.1% | 2025-Q4 stale |
| Green Alpha Advisors, LLC new | 11,126 | $72K | 0.1% | 2025-Q4 stale |
| BlackRock, Inc. new | 5,443 | $51K | 0.1% | 2025-Q2 stale |
| Tower Research Capital LLC (TRC) new | 1,648 | $11K | 0.0% | 2025-Q3 stale |
| MORGAN STANLEY added | 840 | $5K | 0.0% | 2025-Q3 stale |
| PNC Financial Services Group, Inc. | 120 | $780 | 0.0% | 2025-Q4 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale |
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.