Who owns Apex Treasury Corporation Class A (APXT)
Which tracked institutional funds hold APXT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See APXT 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
15 tracked funds added or opened APXT while 23 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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
APXT’s largest tracked holder by dollar value, Harraden Circle Investments, LLC, sizes it at 2.7% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 2.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in APXT 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 70 tracked filers holding APXT, 26 increased or opened the position and 26 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 APXT 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.
New buyers 5
- OMERS ADMINISTRATION Corp$5M
- SONA ASSET MANAGEMENT (US) LLC$3M
- O'Connor Alternative Investments LLC$999K
- Dakota Wealth Management$858K
- Kepos Capital LP$513K
Full exits 7
- Fort Baker Capital Management LP$4M
- STEADFAST CAPITAL MANAGEMENT LP$3M
- Driehaus Capital Management LLC$3M
- StoneX Group Inc.$2M
- MIZUHO SECURITIES USA LLC$2M
- OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)$989K
Largest adds
- Karpus Management, Inc.$12M
- Westchester Capital Management, LLC$5M
- Hudson Bay Capital Management LP$3M
- Parallax Volatility Advisers, L.P.$2M
- TORONTO DOMINION BANK$2M
- Crossingbridge Advisors, LLC$2M
Largest trims
- METEORA CAPITAL, LLC$146M
- TENOR CAPITAL MANAGEMENT Co., L.P.$16M
- Clear Street Group Inc.$6M
- Saba Capital Management, L.P.$5M
- Lineage Point Capital LP$5M
- Context Capital Management, LLC$4M
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 |
|---|---|---|---|---|
| Harraden Circle Investments, LLC added | 1,508,221 | $347M | 48.7% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 425,000 | $102M | 14.3% | 2026-Q1 |
| METEORA CAPITAL, LLC trimmed | 2,689,443 | $27M | 3.8% | 2026-Q1 |
| Context Capital Management, LLC trimmed | 74,900 | $17M | 2.4% | 2026-Q1 |
| GLAZER CAPITAL, LLC added | 1,204,002 | $12M | 1.7% | 2026-Q1 |
| Alberta Investment Management Corp | 1,100,000 | $11M | 1.6% | 2026-Q1 |
| D. E. Shaw & Co., Inc. | 1,033,422 | $10M | 1.5% | 2026-Q2 |
| Westchester Capital Management, LLC added | 1,000,000 | $10M | 1.4% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC trimmed | 986,456 | $10M | 1.4% | 2026-Q1 |
| HighTower Advisors, LLC trimmed | 956,650 | $10M | 1.3% | 2026-Q1 |
| Magnetar Financial LLC | 850,000 | $9M | 1.2% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 850,000 | $8M | 1.2% | 2026-Q1 |
| AQR Arbitrage LLC trimmed | 778,648 | $8M | 1.1% | 2026-Q1 |
| LMR Partners LLP | 750,000 | $8M | 1.1% | 2026-Q1 |
| Polar Asset Management Partners Inc. | 750,000 | $7M | 1.0% | 2026-Q1 |
| Verition Fund Management LLC | 690,000 | $7M | 1.0% | 2026-Q2 |
| Radcliffe Capital Management, L.P. | 675,000 | $7M | 0.9% | 2026-Q1 |
| First Trust Capital Management L.P. trimmed | 654,958 | $7M | 0.9% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 616,356 | $6M | 0.9% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. | 550,000 | $5M | 0.8% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP | 543,750 | $5M | 0.8% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT added | 500,000 | $5M | 0.7% | 2026-Q1 |
| Wealthspring Capital LLC | 494,150 | $5M | 0.7% | 2026-Q1 |
| Crossingbridge Advisors, LLC added | 475,000 | $5M | 0.7% | 2026-Q1 |
| OMERS ADMINISTRATION Corp new | 451,326 | $5M | 0.6% | 2026-Q1 |
| HGC Investment Management Inc. | 400,000 | $4M | 0.6% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP added | 400,000 | $4M | 0.6% | 2026-Q1 |
| TORONTO DOMINION BANK added | 360,000 | $4M | 0.5% | 2026-Q1 |
| SONA ASSET MANAGEMENT (US) LLC new | 342,422 | $3M | 0.5% | 2026-Q1 |
| Centiva Capital, LP added | 315,105 | $3M | 0.4% | 2026-Q1 |
| Allianz Asset Management GmbH | 300,000 | $3M | 0.4% | 2026-Q1 |
| READYSTATE ASSET MANAGEMENT LP | 300,000 | $3M | 0.4% | 2026-Q1 |
| WHITEBOX ADVISORS LLC | 300,000 | $3M | 0.4% | 2026-Q1 |
| Governors Lane LP added | 300,000 | $3M | 0.4% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC trimmed | 251,464 | $2M | 0.4% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. trimmed | 236,165 | $2M | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 220,274 | $2M | 0.3% | 2026-Q1 |
| DLD Asset Management, LP added | 125,000 | $1M | 0.2% | 2026-Q1 |
| K2 PRINCIPAL FUND, L.P. trimmed | 100,000 | $1M | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 100,000 | $1M | 0.1% | 2026-Q1 |
| O'Connor Alternative Investments LLC new | 100,000 | $999K | 0.1% | 2026-Q1 |
| Dakota Wealth Management new | 86,300 | $858K | 0.1% | 2026-Q1 |
| Clear Street Group Inc. added | 80,829 | $803K | 0.1% | 2026-Q1 |
| Walleye Capital LLC | 75,000 | $757K | 0.1% | 2026-Q1 |
| Kepos Capital LP new | 51,573 | $513K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO | 50,000 | $504K | 0.1% | 2026-Q1 |
| Mint Tower Capital Management B.V. trimmed | 50,000 | $497K | 0.1% | 2026-Q1 |
| GRITSTONE ASSET MANAGEMENT LLC | 50,000 | $497K | 0.1% | 2026-Q1 |
| Karpus Management, Inc. trimmed | 46,200 | $466K | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 44,289 | $440K | 0.1% | 2026-Q1 |
| CITIGROUP INC | 25,000 | $253K | 0.0% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 1,050,000 | $252K | 0.0% | 2026-Q1 |
| HEIGHTS CAPITAL MANAGEMENT, INC | 25,000 | $250K | 0.0% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC | 19,869 | $205K | 0.0% | 2026-Q2 |
| ABC ARBITRAGE SA | 20,000 | $199K | 0.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC new | 16,602 | $166K | 0.0% | 2026-Q1 |
| JANE STREET GROUP, LLC new | 14,114 | $143K | 0.0% | 2026-Q1 |
| ROBINSON CAPITAL MANAGEMENT, LLC new | 12,000 | $120K | 0.0% | 2026-Q1 |
| Shaolin Capital Management LLC trimmed | 450,299 | $108K | 0.0% | 2026-Q1 |
| Lineage Point Capital LP | 469,600 | $108K | 0.0% | 2026-Q1 |
| Linden Advisors LP | 425,001 | $98K | 0.0% | 2026-Q1 |
| Saba Capital Management, L.P. trimmed | 299,999 | $69K | 0.0% | 2026-Q1 |
| Periscope Capital Inc. added | 300,000 | $69K | 0.0% | 2026-Q1 |
| Hudson Bay Capital Management LP trimmed | 186,380 | $56K | 0.0% | 2026-Q2 |
| UBS Group AG added | 5,470 | $54K | 0.0% | 2026-Q1 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 200,000 | $46K | 0.0% | 2026-Q1 |
| Virtu Financial LLC added | 58,996 | $14K | 0.0% | 2026-Q1 |
| Bulldog Investors, LLP trimmed | 21,500 | $5K | 0.0% | 2026-Q1 |
| CSS LLC/IL | 10,600 | $3K | 0.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 56 | $557 | 0.0% | 2026-Q1 |
| STEADFAST CAPITAL MANAGEMENT LP new | 300,000 | $3M | 0.4% | 2025-Q4 stale |
| Driehaus Capital Management LLC new | 250,000 | $2M | 0.3% | 2025-Q4 stale |
| StoneX Group Inc. new | 221,994 | $2M | 0.3% | 2025-Q4 stale |
| MIZUHO SECURITIES USA LLC new | 176,794 | $2M | 0.2% | 2025-Q4 stale |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new | 100,000 | $989K | 0.1% | 2025-Q4 stale |
| Sculptor Capital LP new | 52,734 | $522K | 0.1% | 2025-Q4 stale |
| Fort Baker Capital Management LP new | 175,000 | $49K | 0.0% | 2025-Q4 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.