Vault-13

GP-ACT III ACQUISITION CORP GPAT

CL A · Common Stock · CUSIP G4035N103

41 institutional holders -2 vs Q4 2024
25,947,32425.9m shares reported held*
$267.4mreported value*
2 new 5 added 9 reduced 4 sold out net sold ≈ $1.6m (-151.0k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.2m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $10.30.

Trends to Q1 2025

Institutional holders

Managers reporting a position, each quarter

0204060Q3 24: 38Q4 24: 43Q1 25: 4141Q3 24Q4 24Q1 25
Numbers
QuarterHolders
Q3 202438
Q4 202443
Q1 202541

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
20020Q4 24: 11 bought or addedQ4 24: 15 cut or sold outQ4 24Q1 25: 7 bought or addedQ1 25: 13 cut or sold outQ1 25
Numbers
QuarterBought or addedCut or sold out
Q4 20241115
Q1 2025713

Biggest buyers

Westchester Capital Management, LLC Added +250,852+250.9k
MIZUHO SECURITIES USA LLC New +30,000+30.0k
WOLVERINE ASSET MANAGEMENT LLC Added +10,497+10.5k
GLAZER CAPITAL, LLC Added +3,992+4.0k
UBS Group AG Added +3,750+3.8k
CITADEL ADVISORS LLC Added +1,638+1.6k
MORGAN STANLEY New +32+32

Biggest sellers

TORONTO DOMINION BANK Reduced -176,052-176.1k
AQR Arbitrage LLC Reduced -100,000-100.0k
Schechter Investment Advisors, LLC Reduced -46,292-46.3k
Karpus Management, Inc. Reduced -33,287-33.3k
FIR TREE CAPITAL MANAGEMENT LP Sold out -28,846-28.8k
ROBINSON CAPITAL MANAGEMENT, LLC Reduced -19,548-19.5k
Tidal Investments LLC Sold out -19,548-19.5k
Wealthspring Capital LLC Reduced -12,575-12.6k
HIGHBRIDGE CAPITAL MANAGEMENT LLC Sold out -10,000-10.0k
Verition Fund Management LLC Reduced -3,452-3.5k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
GP-Act III Sponsor LLC 13G · exempt (held before listing) new · filed 2025-03-07 19.8% new 7.1m≈ $77.3m 2025-03-07
Polar Asset Management Partners Inc. 13G · institution +7.0 pts · filed 2026-06-04 11.1% +7.0 pts 1.8m≈ $19.6m 2026-06-04
AQR CAPITAL MANAGEMENT LLC 13G · institution filed 2026-08-14 8.7% 1.4m≈ $15.2m 2026-08-14
HGC Investment Management Inc. 13G · institution new · filed 2025-02-14 8.6% new 2.5m≈ $26.9m 2025-02-14
METEORA CAPITAL, LLC 13G · institution new · filed 2025-08-14 6.7% new 1.9m≈ $20.9m 2025-08-14
BARCLAYS PLC 13G · institution no change · filed 2025-03-28 5.2% no change 1.5m≈ $16.2m 2025-03-28

Fell to 5% or below in the last year: First Trust Capital Management L.P. (0.0%, 2026-08-14), Karpus Management, Inc. (0.0%, 2026-06-05), PICTON MAHONEY ASSET MANAGEMENT (4.8%, 2026-04-27), BANK OF MONTREAL /CAN/ (0.0%, 2026-02-12)

Insider purchases and sales in Q1 2025

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported in Q1 2025.

Holders, Q1 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Karpus Management, Inc. 1.20% of their portfolio Pittsford, NY 3,608,1773.6m $37.1m $37.1m 1.20% Reduced -33.3k -33,287
2 First Trust Capital Management L.P. 1.93% of their portfolio CHICAGO, IL 2,587,5002.6m $26.7m $26.7m 1.93% Unchanged
3 HGC Investment Management Inc. 9.08% of their portfolio TORONTO, A6 2,475,0002.5m $25.5m $25.5m 9.08% Unchanged
4 MMCAP International Inc. SPC 3.64% of their portfolio GRAND CAYMAN, E9 2,075,0002.1m $21.4m $21.4m 3.64% Unchanged
5 PICTON MAHONEY ASSET MANAGEMENT 0.66% of their portfolio Toronto, A6 1,875,0001.9m $19.3m $19.3m 0.66% Unchanged
6 Polar Asset Management Partners Inc. 0.57% of their portfolio TORONTO, A6 1,674,9961.7m $17.3m $17.3m 0.57% Unchanged
7 AQR Arbitrage LLC 0.40% of their portfolio Greenwich, CT 1,610,1191.6m $16.6m $16.6m 0.40% Reduced -100.0k -100,000
8 D. E. Shaw & Co., Inc. 0.02% of their portfolio New York, NY 1,237,5001.2m $12.8m $12.8m 0.02% Unchanged
9 LMR Partners LLP 0.25% of their portfolio LONDON, X0 1,225,0001.2m $12.6m $12.6m 0.25% Unchanged
10 Westchester Capital Management, LLC 0.70% of their portfolio VALHALLA, NY 1,160,8521.2m $12.0m $12.0m 0.70% Added +250.9k +250,852
11 Schechter Investment Advisors, LLC 0.76% of their portfolio BIRMINGHAM, MI 893,299893.3k $9.2m $9.2m 0.76% Reduced -46.3k -46,292
12 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 625,000625.0k $6.4m $6.4m 0.01% Unchanged
13 ARISTEIA CAPITAL, L.L.C. 0.16% of their portfolio GREENWICH, CT 500,000500.0k $5.2m $5.2m 0.16% Unchanged
14 HEIGHTS CAPITAL MANAGEMENT, INC 2.27% of their portfolio SAN FRANCISCO, CA 460,000460.0k $4.8m $4.8m 2.27% Unchanged
15 GRITSTONE ASSET MANAGEMENT LLC 4.76% of their portfolio Bethesda, MD 439,911439.9k $4.5m $4.5m 4.76% Reduced -1.5k -1,492
16 RIVERNORTH CAPITAL MANAGEMENT, LLC 0.23% of their portfolio WEST PALM BEACH, FL 421,842421.8k $4.3m $4.3m 0.23% Unchanged
17 COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.03% of their portfolio HARRISBURG, PA 412,264412.3k $4.3m $4.3m 0.03% Unchanged
18 WOLVERINE ASSET MANAGEMENT LLC 0.06% of their portfolio CHICAGO, IL 309,050309.1k $3.2m $3.2m 0.06% Added +10.5k +10,497
19 BERKLEY W R CORP 0.22% of their portfolio Greenwich, CT 297,992298.0k $3.1m $3.1m 0.22% Unchanged
20 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio TORONTO, A6 295,938295.9k $3.1m $3.1m 0.01% Unchanged
21 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 290,000290.0k $3.0m $3.0m 0.00% Unchanged
22 GLAZER CAPITAL, LLC 0.13% of their portfolio New York, NY 276,226276.2k $2.8m $2.8m 0.13% Added +4.0k +3,992
23 Periscope Capital Inc. 1.29% of their portfolio Toronto, A6 225,000225.0k $2.3m $2.3m 1.29% Unchanged
24 Wealthspring Capital LLC 3.32% of their portfolio WEST HARRISON, NY 209,259209.3k $2.2m $2.2m 3.32% Reduced -12.6k -12,575
25 MOORE CAPITAL MANAGEMENT, LP 0.07% of their portfolio NEW YORK, NY 200,000200.0k $2.1m $2.1m 0.07% Unchanged
26 PNC Financial Services Group, Inc. 0.00% of their portfolio Pittsburgh, PA 160,000160.0k $1.6m $1.6m 0.00% Unchanged
27 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 141,211141.2k $1.5m $1.5m 0.00% Reduced -176.1k -176,052
28 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 137,424137.4k $1.4m $1.4m 0.00% Unchanged
29 Verition Fund Management LLC 0.01% of their portfolio GREENWICH, CT 126,526126.5k $1.3m $1.3m 0.01% Reduced -3.5k -3,452
30 Dakota Wealth Management 0.01% of their portfolio PALM BEACH GARDENS, FL 48,40048.4k $498.0k $498.0k 0.01% Unchanged
31 Kepos Capital LP 0.36% of their portfolio NEW YORK, NY 42,50042.5k $438.0k $438.0k 0.36% Unchanged
32 MIZUHO SECURITIES USA LLC 0.01% of their portfolio NEW YORK, NY 30,00030.0k $303.0k $303.0k 0.01% New
33 ROBINSON CAPITAL MANAGEMENT, LLC 0.09% of their portfolio GROSSE POINTE FARMS, MI 22,25022.2k $229.8k $229.8k 0.09% Reduced -19.5k -19,548
34 Wellspring Financial Advisors, LLC 0.02% of their portfolio CLEVELAND, OH 18,00018.0k $185.2k $185.2k 0.02% Unchanged
35 TrueMark Investments, LLC 0.05% of their portfolio CHICAGO, IL 17,74817.7k $183.3k $183.3k 0.05% Unchanged
36 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 11,77811.8k $121.7k $121.7k 0.00% Added +1.6k +1,638
37 CONDOR CAPITAL MANAGEMENT 0.01% of their portfolio MARTINSVILLE, NJ 11,51811.5k $118.5k $118.5k 0.01% Unchanged
38 UBS Group AG 0.00% of their portfolio ZURICH, V8 4,1504.2k $42.7k $42.7k 0.00% Added +3.8k +3,750
39 CLEAR STREET LLC 0.00% of their portfolio NEW YORK, NY 121121 $1.2k $1.2k 0.00% Reduced -538 -538
40 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 3232 $329 $329 0.00% New
41 CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio BIRMINGHAM, AL 00 $0 $0 — Unchanged