Who owns AACOU
Which tracked institutional funds hold AACOU, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AACOU 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
4 tracked funds added or opened AACOU while 7 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
AACOU’s largest tracked holder by dollar value, Magnetar Financial LLC, sizes it at 0.2% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AACOU 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 50 tracked filers holding AACOU, 12 increased or opened the position and 20 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 AACOU 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.
New buyers 1
- WOLVERINE ASSET MANAGEMENT LLC$1M
Full exits 6
- Mint Tower Capital Management B.V.$9M
- TENOR CAPITAL MANAGEMENT Co., L.P.$7M
- GLAZER CAPITAL, LLC$5M
- SYQUANT CAPITAL SAS$1M
- Virtu Financial LLC$926K
- Kepos Capital LP$746K
Largest adds
- Clear Street Group Inc.$679K
- Radcliffe Capital Management, L.P.$379K
- AQR Arbitrage LLC$263K
Largest trims
- Saba Capital Management, L.P.$2M
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 |
|---|---|---|---|---|
| Magnetar Financial LLC | 1,950,000 | $19M | 9.2% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1,800,000 | $18M | 8.5% | 2026-Q2 |
| Linden Advisors LP | 1,350,000 | $13M | 6.4% | 2026-Q2 |
| AQR Arbitrage LLC added | 1,027,935 | $10M | 4.9% | 2026-Q2 |
| Polar Asset Management Partners Inc. | 1,000,000 | $10M | 4.7% | 2026-Q2 |
| LMR Partners LLP | 900,000 | $9M | 4.3% | 2026-Q2 |
| Kryger Capital LLC trimmed | 839,955 | $8M | 4.0% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 800,000 | $8M | 3.8% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC | 750,000 | $8M | 3.6% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 726,000 | $7M | 3.4% | 2026-Q2 |
| Alberta Investment Management Corp | 700,000 | $7M | 3.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 685,947 | $7M | 3.2% | 2026-Q2 |
| Verition Fund Management LLC trimmed | 599,999 | $6M | 2.8% | 2026-Q2 |
| OMERS ADMINISTRATION Corp | 450,000 | $5M | 2.1% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. added | 445,414 | $4M | 2.1% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC trimmed | 424,998 | $4M | 2.0% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP | 400,000 | $4M | 1.9% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT trimmed | 399,993 | $4M | 1.9% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 362,500 | $4M | 1.7% | 2026-Q2 |
| Radcliffe Capital Management, L.P. added | 361,159 | $4M | 1.7% | 2026-Q2 |
| WHITEBOX ADVISORS LLC | 300,000 | $3M | 1.4% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 228,235 | $2M | 1.1% | 2026-Q2 |
| Calamos Advisors LLC added | 213,890 | $2M | 1.0% | 2026-Q2 |
| Lineage Point Capital LP trimmed | 199,395 | $2M | 1.0% | 2026-Q2 |
| Periscope Capital Inc. trimmed | 199,800 | $2M | 0.9% | 2026-Q2 |
| BERKLEY W R CORP trimmed | 160,095 | $2M | 0.8% | 2026-Q2 |
| Ghisallo Capital Management LLC | 150,000 | $1M | 0.7% | 2026-Q2 |
| DLD Asset Management, LP | 150,000 | $1M | 0.7% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC new | 148,753 | $1M | 0.7% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 140,000 | $1M | 0.7% | 2026-Q2 |
| Westchester Capital Management, LLC | 125,000 | $1M | 0.6% | 2026-Q2 |
| L1 Global Manager Pty Ltd | 100,000 | $990K | 0.5% | 2026-Q2 |
| Centiva Capital, LP | 96,730 | $958K | 0.5% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 85,950 | $851K | 0.4% | 2026-Q2 |
| PRELUDE CAPITAL MANAGEMENT, LLC | 55,000 | $551K | 0.3% | 2026-Q2 |
| Stoic Point Capital Management LLC | 55,000 | $551K | 0.3% | 2026-Q2 |
| Clear Street Group Inc. added | 45,105 | $447K | 0.2% | 2026-Q2 |
| ABC ARBITRAGE SA | 40,000 | $396K | 0.2% | 2026-Q2 |
| DELTEC ASSET MANAGEMENT LLC trimmed | 34,950 | $346K | 0.2% | 2026-Q2 |
| Quarry LP | 25,000 | $251K | 0.1% | 2026-Q2 |
| HEIGHTS CAPITAL MANAGEMENT, INC trimmed | 24,697 | $244K | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 15,000 | $150K | 0.1% | 2026-Q2 |
| Hudson Bay Capital Management LP added | 12,690 | $126K | 0.1% | 2026-Q2 |
| Tuttle Capital Management, LLC added | 10,769 | $108K | 0.1% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS new | 133,333 | $43K | 0.0% | 2026-Q2 |
| Saba Capital Management, L.P. trimmed | 83,316 | $36K | 0.0% | 2026-Q2 |
| Parallax Volatility Advisers, L.P. new | 74,574 | $36K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 2,843 | $28K | 0.0% | 2026-Q2 |
| UBS Group AG new | 30 | $300 | 0.0% | 2026-Q2 |
| MORGAN STANLEY new | 22 | $218 | 0.0% | 2026-Q2 |
| Mint Tower Capital Management B.V. new | 900,000 | $9M | 4.3% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. new | 713,283 | $7M | 3.4% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC new | 519,652 | $5M | 2.5% | 2026-Q1 stale (1 quarter behind) |
| SYQUANT CAPITAL SAS new | 150,000 | $1M | 0.7% | 2026-Q1 stale (1 quarter behind) |
| Virtu Financial LLC new | 93,159 | $926K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| Kepos Capital LP new | 75,000 | $746K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| HRT FINANCIAL LP new | 50,000 | $497K | 0.2% | 2026-Q1 stale (1 quarter 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.