13F Insight
DOSSIER · 13F Holders · Q2 2026

GP-ACT III ACQUISITION CORP

34 institutions still hold GP-ACT III ACQUISITION CORP as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP G4035N129·34 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$2M
visible holders
Holders
34
filers reporting
Concentration
12.05%
Harraden Circle Investments, LLC #1
top holder share
AI Holders Summary · Q2 2026

34 institutions reported GP-ACT III ACQUISITION CORP in Q2 2026. Harraden Circle Investments, LLC leads at 12.0% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Harraden Circle Investments, LLC
CIK 0001910592
$289K1.5M0.04%Q2 202602
Polar Asset Management Partners Inc.
CIK 0001326389
$235K1.2M0.00%Q2 202603
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
CIK 0001535845
$207K938K0.00%Q2 202604
PICTON MAHONEY ASSET MANAGEMENT
CIK 0001539041
$207K938K0.00%Q2 202605
MMCAP International Inc. SPC
CIK 0001304857
$197K1.0M0.02%Q2 202606
Alberta Investment Management Corp
CIK 0001463559· Sovereign
$154K813K0.00%Q2 202607
Wealthspring Capital LLC
CIK 0001844495
$144K759K0.03%Q2 202608
Schechter Investment Advisors, LLC
CIK 0001951586
$126K676K0.01%Q1 202509
AQR Arbitrage LLC
CIK 0001167456
$125K463K0.00%Q4 202510
LMR Partners LLP
CIK 0001578621
$116K613K0.00%Q2 202611
TORONTO DOMINION BANK
CIK 0000947263
$92K482K0.00%Q2 202612
LINDEN ADVISORS LP
CIK 0001279396
$86K360K0.00%Q2 202613
CSS LLC/IL
CIK 0001103646
$84K442K0.00%Q2 202614
ARISTEIA CAPITAL, L.L.C.
CIK 0001080171
$59K245K0.00%Q2 202615
Shaolin Capital Management LLC
CIK 0001766806
$56K295K0.00%Q2 202616
Lepercq De Neuflize Asset Management LLC
CIK 0001854423
$48K250K0.03%Q2 202617
Saba Capital Management, L.P.
CIK 0001510281
$46K193K0.00%Q2 202618
Verition Fund Management LLC
CIK 0001454027
$43K225K0.00%Q2 202619
PERISCOPE CAPITAL INC.
CIK 0001695320
$42K211K0.00%Q2 202620
GRITSTONE ASSET MANAGEMENT LLC
CIK 0001964236
$41K217K0.04%Q2 2026
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