Who owns IACOU
Which tracked institutional funds hold IACOU, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See IACOU company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
IACOU’s largest tracked holder by dollar value, Polar Asset Management Partners Inc., sizes it at 0.7% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.6pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in IACOU 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
Only one quarter (2026-Q1) of 13F history is available — a quarter-over-quarter accumulation delta needs two.
We do not publish a positioning read for a window we cannot measure honestly. A starting question, not a verdict.
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.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Polar Asset Management Partners Inc. new | 2,250,000 | $22M | 6.8% | 2026-Q1 |
| Linden Advisors LP new | 1,750,000 | $17M | 5.3% | 2026-Q1 |
| MMCAP International Inc. SPC new | 1,750,000 | $17M | 5.3% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND new | 1,700,000 | $17M | 5.1% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. new | 1,699,228 | $17M | 5.1% | 2026-Q1 |
| LMR Partners LLP new | 1,500,000 | $15M | 4.5% | 2026-Q1 |
| AQR Arbitrage LLC new | 1,414,697 | $14M | 4.3% | 2026-Q1 |
| Hudson Bay Capital Management LP trimmed | 1,256,541 | $12M | 3.8% | 2026-Q2 |
| Magnetar Financial LLC trimmed | 1,249,995 | $12M | 3.8% | 2026-Q2 |
| Lineage Point Capital LP new | 1,150,819 | $11M | 3.5% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. new | 1,050,000 | $10M | 3.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC | 1,000,000 | $10M | 3.0% | 2026-Q2 |
| Calamos Advisors LLC new | 900,000 | $9M | 2.7% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. new | 800,000 | $8M | 2.4% | 2026-Q1 |
| HGC Investment Management Inc. new | 800,000 | $8M | 2.4% | 2026-Q1 |
| WHITEBOX ADVISORS LLC new | 797,378 | $8M | 2.4% | 2026-Q1 |
| OMERS ADMINISTRATION Corp new | 750,000 | $7M | 2.3% | 2026-Q1 |
| GLAZER CAPITAL, LLC new | 700,000 | $7M | 2.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS new | 585,303 | $6M | 1.8% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP | 583,593 | $6M | 1.8% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC new | 500,000 | $5M | 1.5% | 2026-Q1 |
| First Trust Capital Management L.P. new | 500,000 | $5M | 1.5% | 2026-Q1 |
| JPMORGAN CHASE & CO new | 490,070 | $5M | 1.5% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC new | 450,000 | $4M | 1.4% | 2026-Q2 |
| Radcliffe Capital Management, L.P. new | 365,082 | $4M | 1.1% | 2026-Q1 |
| TIG Advisors, LLC new | 350,000 | $3M | 1.1% | 2026-Q1 |
| Saba Capital Management, L.P. new | 350,000 | $3M | 1.1% | 2026-Q1 |
| Decagon Asset Management LLP new | 318,350 | $3M | 1.0% | 2026-Q1 |
| Ghisallo Capital Management LLC new | 300,000 | $3M | 0.9% | 2026-Q1 |
| Qube Research & Technologies Ltd new | 300,000 | $3M | 0.9% | 2026-Q1 |
| Sculptor Capital LP new | 300,000 | $3M | 0.9% | 2026-Q1 |
| SYQUANT CAPITAL SAS new | 300,000 | $3M | 0.9% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC new | 273,000 | $3M | 0.8% | 2026-Q1 |
| Kryger Capital LLC new | 251,758 | $2M | 0.8% | 2026-Q1 |
| Alberta Investment Management Corp new | 250,000 | $2M | 0.8% | 2026-Q1 |
| Periscope Capital Inc. new | 250,000 | $2M | 0.8% | 2026-Q1 |
| PEAK6 LLC new | 250,000 | $2M | 0.8% | 2026-Q1 |
| L1 Global Manager Pty Ltd new | 250,000 | $2M | 0.8% | 2026-Q1 |
| Context Capital Management, LLC new | 200,000 | $2M | 0.6% | 2026-Q1 |
| CSS LLC/IL new | 200,000 | $2M | 0.6% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP new | 200,000 | $2M | 0.6% | 2026-Q1 |
| Clear Street Group Inc. new | 194,082 | $2M | 0.6% | 2026-Q1 |
| Wealthspring Capital LLC new | 190,850 | $2M | 0.6% | 2026-Q1 |
| StoneX Group Inc. new | 175,112 | $2M | 0.5% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. new | 166,750 | $2M | 0.5% | 2026-Q1 |
| METEORA CAPITAL, LLC new | 152,103 | $2M | 0.5% | 2026-Q1 |
| DLD Asset Management, LP new | 150,000 | $1M | 0.5% | 2026-Q1 |
| K2 PRINCIPAL FUND, L.P. new | 150,000 | $1M | 0.5% | 2026-Q1 |
| Westchester Capital Management, LLC new | 150,000 | $1M | 0.5% | 2026-Q1 |
| PICTON MAHONEY ASSET MANAGEMENT new | 150,000 | $1M | 0.5% | 2026-Q1 |
| HRT FINANCIAL LP new | 150,000 | $1M | 0.5% | 2026-Q1 |
| Virtu Financial LLC new | 110,161 | $1M | 0.3% | 2026-Q1 |
| Shaolin Capital Management LLC new | 109,200 | $1M | 0.3% | 2026-Q1 |
| BERKLEY W R CORP new | 104,615 | $1M | 0.3% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC new | 100,000 | $991K | 0.3% | 2026-Q1 |
| Galaxy Digital Inc. new | 100,000 | $991K | 0.3% | 2026-Q1 |
| HEIGHTS CAPITAL MANAGEMENT, INC new | 95,000 | $941K | 0.3% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD new | 77,100 | $764K | 0.2% | 2026-Q1 |
| HBK INVESTMENTS L P new | 72,867 | $722K | 0.2% | 2026-Q1 |
| PRELUDE CAPITAL MANAGEMENT, LLC new | 55,000 | $545K | 0.2% | 2026-Q1 |
| Stoic Point Capital Management LLC new | 55,000 | $545K | 0.2% | 2026-Q1 |
| DELTEC ASSET MANAGEMENT LLC new | 50,000 | $496K | 0.2% | 2026-Q1 |
| ABC ARBITRAGE SA new | 40,000 | $396K | 0.1% | 2026-Q1 |
| TORONTO DOMINION BANK new | 37,985 | $376K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 30,000 | $297K | 0.1% | 2026-Q1 |
| PenderFund Capital Management Ltd. new | 25,000 | $248K | 0.1% | 2026-Q1 |
| Paloma Partners Management Co new | 24,993 | $248K | 0.1% | 2026-Q1 |
| ROYAL BANK OF CANADA new | 20,203 | $200K | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 14,439 | $143K | 0.0% | 2026-Q1 |
| ROBINSON CAPITAL MANAGEMENT, LLC new | 10,250 | $102K | 0.0% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 87,900 | $30K | 0.0% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 83,333 | $29K | 0.0% | 2026-Q2 |
| ExodusPoint Capital Management, LP trimmed | 33,333 | $11K | 0.0% | 2026-Q2 |
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.