Who owns GP-Act III Acquisition (GPAT)
Which tracked institutional funds hold GPAT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See GPAT 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
The tracked-fund tape on GPAT is one-sided between 2026-Q1 and 2026-Q2: 4 added or opened and 35 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
GPAT’s largest tracked holder by dollar value, Harraden Circle Investments, LLC, sizes it at 1.7% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in GPAT 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 38 tracked filers holding GPAT, 13 increased or opened the position and 50 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 GPAT 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.
Full exits 20
- Harraden Circle Investments, LLC$213M
- METEORA CAPITAL, LLC$37M
- Karpus Management, Inc.$24M
- First Trust Capital Management L.P.$23M
- Lepercq De Neuflize Asset Management LLC$21M
- D. E. Shaw & Co., Inc.$15M
Largest adds
- Polar Asset Management Partners Inc.$7M
- HGC Investment Management Inc.$4M
- Verition Fund Management LLC$2M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$2M
Largest trims
- LMR Partners LLP$13M
- PICTON MAHONEY ASSET MANAGEMENT$12M
- Wealthspring Capital LLC$11M
- Linden Advisors LP$9M
- Radcliffe Capital Management, L.P.$7M
- Alberta Investment Management Corp$7M
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 |
|---|---|---|---|---|
| Polar Asset Management Partners Inc. added | 1,800,000 | $20M | 4.1% | 2026-Q2 |
| AQR Arbitrage LLC trimmed | 1,400,000 | $15M | 3.2% | 2026-Q2 |
| MMCAP International Inc. SPC | 1,275,000 | $14M | 2.9% | 2026-Q2 |
| Alberta Investment Management Corp trimmed | 1,000,000 | $11M | 2.3% | 2026-Q2 |
| BERKLEY W R CORP trimmed | 497,064 | $5M | 1.1% | 2026-Q2 |
| Verition Fund Management LLC added | 398,885 | $4M | 0.9% | 2026-Q2 |
| HGC Investment Management Inc. added | 399,387 | $4M | 0.9% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 345,181 | $4M | 0.8% | 2026-Q2 |
| DEUTSCHE BANK AG\ | 290,000 | $3M | 0.7% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT trimmed | 250,000 | $3M | 0.6% | 2026-Q2 |
| Periscope Capital Inc. trimmed | 150,000 | $2M | 0.3% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 149,950 | $2M | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 99,860 | $1M | 0.2% | 2026-Q2 |
| Lineage Point Capital LP trimmed | 64,795 | $716K | 0.1% | 2026-Q2 |
| MIZUHO SECURITIES USA LLC | 60,098 | $649K | 0.1% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP trimmed | 50,000 | $544K | 0.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 21,362 | $233K | 0.0% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 20,039 | $218K | 0.0% | 2026-Q2 |
| Clear Street Group Inc. added | 16,485 | $181K | 0.0% | 2026-Q2 |
| Wealthspring Capital LLC trimmed | 759,264 | $144K | 0.0% | 2026-Q2 |
| LMR Partners LLP trimmed | 612,500 | $116K | 0.0% | 2026-Q2 |
| Linden Advisors LP trimmed | 360,400 | $86K | 0.0% | 2026-Q2 |
| LONGFELLOW INVESTMENT MANAGEMENT CO LLC | 7,800 | $85K | 0.0% | 2026-Q2 |
| CSS LLC/IL | 441,672 | $84K | 0.0% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. trimmed | 245,375 | $59K | 0.0% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 294,650 | $56K | 0.0% | 2026-Q2 |
| Saba Capital Management, L.P. | 193,229 | $46K | 0.0% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC trimmed | 225,599 | $44K | 0.0% | 2026-Q2 |
| UBS Group AG | 3,970 | $44K | 0.0% | 2026-Q2 |
| GRITSTONE ASSET MANAGEMENT LLC | 217,248 | $41K | 0.0% | 2026-Q2 |
| L1 Global Manager Pty Ltd trimmed | 110,325 | $21K | 0.0% | 2026-Q2 |
| DLD Asset Management, LP | 90,500 | $17K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 30,923 | $6K | 0.0% | 2026-Q2 |
| Arax Advisory Partners new | 22,600 | $4K | 0.0% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 17,743 | $3K | 0.0% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 17,600 | $3K | 0.0% | 2026-Q2 |
| Radcliffe Capital Management, L.P. trimmed | 13,070 | $3K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 23 | $250 | 0.0% | 2026-Q2 |
| Harraden Circle Investments, LLC trimmed | 1,520,737 | $213M | 44.2% | 2026-Q1 stale (1 quarter behind) |
| METEORA CAPITAL, LLC trimmed | 238,185 | $33M | 6.9% | 2026-Q1 stale (1 quarter behind) |
| Karpus Management, Inc. trimmed | 2,230,216 | $24M | 5.0% | 2026-Q1 stale (1 quarter behind) |
| First Trust Capital Management L.P. | 2,091,077 | $23M | 4.7% | 2026-Q1 stale (1 quarter behind) |
| Lepercq De Neuflize Asset Management LLC new | 150,000 | $21M | 4.4% | 2026-Q1 stale (1 quarter behind) |
| D. E. Shaw & Co., Inc. | 1,423,125 | $15M | 3.2% | 2026-Q1 stale (1 quarter behind) |
| Westchester Capital Management, LLC trimmed | 860,852 | $9M | 1.9% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 750,000 | $8M | 1.7% | 2026-Q1 stale (1 quarter behind) |
| WOLVERINE ASSET MANAGEMENT LLC trimmed | 745,440 | $8M | 1.7% | 2026-Q1 stale (1 quarter behind) |
| TWO SIGMA INVESTMENTS, LP | 625,000 | $7M | 1.4% | 2026-Q1 stale (1 quarter behind) |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC added | 452,072 | $5M | 1.0% | 2026-Q1 stale (1 quarter behind) |
| HEIGHTS CAPITAL MANAGEMENT, INC trimmed | 388,719 | $4M | 0.9% | 2026-Q1 stale (1 quarter behind) |
| O'Connor Alternative Investments LLC new | 250,000 | $3M | 0.6% | 2026-Q1 stale (1 quarter behind) |
| Jain Global LLC trimmed | 249,980 | $3M | 0.6% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC trimmed | 236,227 | $3M | 0.5% | 2026-Q1 stale (1 quarter behind) |
| SONA ASSET MANAGEMENT (US) LLC new | 200,000 | $2M | 0.4% | 2026-Q1 stale (1 quarter behind) |
| GOLDMAN SACHS GROUP INC | 137,739 | $1M | 0.3% | 2026-Q1 stale (1 quarter behind) |
| PNC FINANCIAL SERVICES GROUP, INC. | 80,000 | $867K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS trimmed | 53,900 | $584K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Dakota Wealth Management trimmed | 46,400 | $503K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Kepos Capital LP | 42,500 | $461K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| ROBINSON CAPITAL MANAGEMENT, LLC | 22,250 | $240K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Wellspring Financial Advisors, LLC | 21,200 | $230K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Cannon Global Investment Management, LLC added | 16,700 | $181K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| TrueMark Investments, LLC | 16,017 | $174K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| K2 PRINCIPAL FUND, L.P. | 121,798 | $17K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| ROYAL BANK OF CANADA new | 900 | $10K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| NATIONAL BANK OF CANADA /FI/ trimmed | 109 | $1K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new | 250,000 | $3M | 0.6% | 2025-Q4 stale (2 quarters behind) |
| CONDOR CAPITAL MANAGEMENT | 10,632 | $114K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Parallax Volatility Advisers, L.P. new | 25,159 | $7K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Quarry LP trimmed | 64,977 | $689K | 0.1% | 2025-Q3 stale (3 quarters behind) |
| CANTOR FITZGERALD, L. P. | 2,500,000 | $650K | 0.1% | 2025-Q3 stale (3 quarters behind) |
| BANK OF AMERICA CORP /DE/ new | 8,000 | $85K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Virtu Financial LLC new | 58,731 | $620K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| BARDIN HILL MANAGEMENT PARTNERS LP new | 16,474 | $174K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CLEAR STREET LLC trimmed | 14,759 | $157K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters 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.