GP-Act III Acquisition Corp.
GP-Act III Acquisition Corp. (GPAT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · GPAT · as of Sep 30, 2025
Ownership Breakdown
53
Institutional Holders
▲ 4 vs Q2
$297.24M
Total Inst. Value
▲ $3.11M vs Q2
35.94M
Shares Outstanding
freeFloat 94.83%
28.04M
13F Shares Held
▲ 150,369 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
GPAT largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
KARPUS MANAGEMENT, INC. blank checks | 2.31M | 6.42% | 6.42% | $24.45B | Nov 14, 2025 | ▼ 32.2K |
FIRST TRUST CAPITAL MANAGEMENT L.P. blank checks | 2.09M | 5.82% | 5.82% | $22.17B | Nov 17, 2025 | — held |
PICTON MAHONEY ASSET MANAGEMENT blank checks | 1.88M | 5.22% | 5.22% | $19.88B | Nov 12, 2025 | — held |
ALBERTA INVESTMENT MANAGEMENT CORP blank checks | 1.63M | 4.52% | 4.52% | $17.23B | Feb 17, 2026 | — held |
AQR ARBITRAGE LLC blank checks | 1.58M | 4.39% | 4.39% | $16.71B | Nov 14, 2025 | ▼ 9.0K |
D. E. SHAW & CO., INC. blank checks | 1.42M | 3.96% | 3.96% | $15.09B | Nov 14, 2025 | — held |
HGC INVESTMENT MANAGEMENT INC. blank checks | 1.38M | 3.83% | 3.83% | $14.57B | Nov 14, 2025 | — held |
MMCAP INTERNATIONAL INC. SPC blank checks | 1.27M | 3.55% | 3.55% | $13.52B | Nov 10, 2025 | — held |
LMR PARTNERS LLP blank checks | 1.23M | 3.41% | 3.41% | $12.98B | Nov 14, 2025 | — held |
POLAR ASSET MANAGEMENT PARTNERS INC. blank checks | 1.17M | 3.27% | 3.27% | $12.45B | Dec 1, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
10
Increased
+1.55M shares4
New Positions
first time holders11
Decreased
−2.17M shares0
Sold Out
fully exitedNet shares change (top 50)
617.4K
+1.55M / −2.17M
Net new holders
+3
4 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
GPAT insider trading · insider activity
Source: SEC Form 4
Recent Insider Transactions
Showing 10 most recent · Common Stock only
No recent insider transactions reported.
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
GP-Act III Acquisition Corp. (GPAT) is primarily owned by institutional investors, who hold approximately 78.0% of total shares outstanding. Company insiders own approximately 5.17%, while retail and public investors account for the remaining 16.80%.
The largest institutional shareholder of GP-Act III Acquisition Corp. is KARPUS MANAGEMENT, INC., holding approximately 2.31 million shares — equal to 6.42% of outstanding shares — as of September 30, 2025.
A total of 53 institutional investors currently hold GPAT stock, with a combined institutional value of approximately $297,244,635 as of the most recent 13F filing period.
Frequently asked questions
GPAT ownershipGP-Act III Acquisition Corp. (GPAT) is primarily owned by institutional investors, who hold approximately 78.0% of shares. The largest shareholder is KARPUS MANAGEMENT, INC. with a 6.42% stake. Company insiders hold 5.17%. Data sourced from SEC Form 13F as of September 30, 2025.