Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in GPAT held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Polar Asset Management Partners Inc. | 1.8M | $19.6M | +53.2% | 5.009% | 0.32% |
| 2 | AQR Arbitrage LLC | 1.4M | $15.2M | -11.2% | 3.896% | 0.22% |
| 3 | MMCAP International Inc. SPC | 1.3M | $13.9M | 0.0% | 3.548% | 1.17% |
| 4 | Alberta Investment Management Corp | 1.0M | $10.9M | -38.5% | 2.783% | 0.06% |
| 5 | MIZUHO SECURITIES USA LLC | 558K | $6.0M | +829.3% | 1.554% | 0.06% |
| 6 | BERKLEY W R CORP | 497K | $5.4M | -41.3% | 1.383% | 0.25% |
| 7 | Verition Fund Management LLC | 399K | $4.3M | +75.3% | 1.110% | 0.01% |
| 8 | HGC Investment Management Inc. | 399K | $4.3M | β | 1.111% | 0.86% |
| 9 | TORONTO DOMINION BANK | 345K | $3.8M | -45.7% | 0.961% | 0.00% |
| 10 | DEUTSCHE BANK AG\ | 290K | $3.1M | 0.0% | 0.807% | 0.00% |
| 11 | PICTON MAHONEY ASSET MANAGEMENT | 250K | $2.7M | -81.8% | 0.696% | 0.02% |
| 12 | PERISCOPE CAPITAL INC. | 150K | $1.7M | -40.0% | 0.417% | 0.15% |
| 13 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 150K | $1.6M | β | 0.417% | 0.00% |
| 14 | JPMORGAN CHASE & CO | 100K | $1.1M | -81.8% | 0.278% | 0.00% |
| 15 | Lineage Point Capital LP | 65K | $716K | -0.3% | 0.180% | 0.15% |
| 16 | MOORE CAPITAL MANAGEMENT, LP | 50K | $544K | -75.0% | 0.139% | 0.01% |
| 17 | GEODE CAPITAL MANAGEMENT, LLC | 21K | $233K | +87.5% | 0.059% | 0.00% |
| 18 | CITADEL ADVISORS LLC | 20K | $218K | +16.7% | 0.056% | 0.00% |
| 19 | Clear Street Group Inc. | 9K | $100K | -10.9% | 0.026% | 0.00% |
| 20 | LONGFELLOW INVESTMENT MANAGEMENT CO LLC | 8K | $85K | 0.0% | 0.022% | 0.02% |
| 21 | Kepos Capital LP | 43K | $470 | 0.0% | 0.118% | 0.64% |
| 22 | MORGAN STANLEY | 23 | $250 | -64.1% | 0.000% | 0.00% |
| 23 | UBS Group AG | 18 | $195 | -90.3% | 0.000% | 0.00% |
| 24 | HRT FINANCIAL LP | 15K | $162 | β | 0.042% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in GPAT β a direct measure of their conviction.
Filings activity in GPAT during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 24 | 54% | 24.61% | 49.28 pp | $96M | 66% |
| Q1 2026 | 52 | +2.0% | 73.89% | +0.51 pp | $285M | +2.1% |
| Q4 2025 | 51 | 1.9% | 73.38% | +11.40 pp | $279M | +3.1% |
| Q3 2025 | 52 | +6.1% | 61.98% | 0.11 pp | $271M | 0.0% |
| Q2 2025 | 49 | +20% | 62.09% | +3.86 pp | $271M | +9.6% |
| Q1 2025 | 41 | +0.0% | 58.23% | +0.75 pp | $247M | +2.8% |
| Q4 2024 | 41 | +7.9% | 57.48% | +2.63 pp | $240M | +8.0% |
| Q3 2024 | 38 | β | 54.85% | β | $222M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying GPAT stock.
Based on Q2 2026 13F filings, institutional ownership of GP-Act III Acquisition Corp. stands at 24.6%, held across 24 reporting institutions.
Polar Asset Management Partners Inc. is the largest reported institutional holder of GPAT, with approximately 1,800,000 shares worth $0.02B as of Q2 2026.
Yes β 1 widely-followed marquee investor appear among the top 25 institutional holders of GPAT, including CITADEL ADVISORS LLC.
Our composite Smart Money Score for GPAT is 17 out of 100 (Heavy Distribution). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
1 institutions opened new positions in GPAT during Q2 2026, while 30 fully exited. 10 added to existing positions and 11 trimmed.
GPAT institutional ownership fell by 49.28 percentage points quarter-over-quarter, with a net change of -28 holders.
The top 10 institutions account for 90.6% of all reported 13F value in GPAT, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
GP-Act III Acquisition Corp. (GPAT) Institutional Ownership