Who owns APMCU
Which tracked institutional funds hold APMCU, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See APMCU 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.
Conviction spread
APMCU’s largest tracked holder by dollar value, Magnetar Financial LLC, sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in APMCU 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-Q2) 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We do not publish a positioning read for a window we cannot measure honestly.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, most shares held first (every row is from one quarter; reported value breaks ties). “% 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 |
|---|---|---|---|---|
| Magnetar Financial LLC new | 1,200,000 | $12M | 14.6% | 2026-Q2 |
| Wealthspring Capital LLC new | 963,290 | $10M | 11.8% | 2026-Q2 |
| AQR Arbitrage LLC new | 651,015 | $7M | 7.9% | 2026-Q2 |
| First Trust Capital Management L.P. new | 630,601 | $6M | 7.7% | 2026-Q2 |
| Clear Street Group Inc. new | 422,655 | $4M | 4.9% | 2026-Q2 |
| Shaolin Capital Management LLC new | 405,851 | $4M | 5.0% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL new | 315,000 | $3M | 3.8% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC new | 300,000 | $3M | 3.7% | 2026-Q2 |
| LMR Partners LLP new | 250,000 | $3M | 3.1% | 2026-Q2 |
| BERKLEY W R CORP new | 247,605 | $2M | 3.0% | 2026-Q2 |
| CANTOR FITZGERALD, L. P. new | 211,449 | $2M | 2.6% | 2026-Q2 |
| TORONTO DOMINION BANK new | 200,000 | $2M | 2.4% | 2026-Q2 |
| WHITEBOX ADVISORS LLC new | 200,000 | $2M | 2.4% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS new | 198,985 | $2M | 2.4% | 2026-Q2 |
| Periscope Capital Inc. new | 175,500 | $2M | 2.1% | 2026-Q2 |
| Linden Advisors LP new | 175,000 | $2M | 2.1% | 2026-Q2 |
| Radcliffe Capital Management, L.P. new | 150,000 | $2M | 1.8% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. new | 150,000 | $2M | 1.8% | 2026-Q2 |
| Yakira Capital Management, Inc. new | 150,000 | $2M | 1.8% | 2026-Q2 |
| Calamos Advisors LLC new | 150,000 | $2M | 1.8% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP new | 130,000 | $1M | 1.6% | 2026-Q2 |
| Westchester Capital Management, LLC new | 130,000 | $1M | 1.6% | 2026-Q2 |
| GRITSTONE ASSET MANAGEMENT LLC new | 124,988 | $1M | 1.5% | 2026-Q2 |
| Parallax Volatility Advisers, L.P. new | 124,064 | $1M | 1.5% | 2026-Q2 |
| L1 Global Manager Pty Ltd new | 75,000 | $753K | 0.9% | 2026-Q2 |
| Bulldog Investors, LLP new | 75,000 | $753K | 0.9% | 2026-Q2 |
| Hartree Partners, LP new | 75,000 | $750K | 0.9% | 2026-Q2 |
| DLD Asset Management, LP new | 60,000 | $602K | 0.7% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC new | 49,095 | $493K | 0.6% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 40,000 | $402K | 0.5% | 2026-Q2 |
| Crossingbridge Advisors, LLC new | 35,000 | $351K | 0.4% | 2026-Q2 |
| ABC ARBITRAGE SA new | 30,000 | $301K | 0.4% | 2026-Q2 |
| Lineage Point Capital LP new | 25,000 | $251K | 0.3% | 2026-Q2 |
| StoneX Group Inc. new | 25,000 | $251K | 0.3% | 2026-Q2 |
| CITADEL ADVISORS LLC new | 24,790 | $249K | 0.3% | 2026-Q2 |
| ROBINSON CAPITAL MANAGEMENT, LLC new | 15,000 | $150K | 0.2% | 2026-Q2 |
| Evercore Wealth Management, LLC new | 13,850 | $139K | 0.2% | 2026-Q2 |
| CONDOR CAPITAL MANAGEMENT new | 12,860 | $129K | 0.2% | 2026-Q2 |
| Arax Advisory Partners new | 4,500 | $45K | 0.1% | 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.