Pioneer Acquisition I Corp

PACH

Market cap $292M

61 hedge funds and large institutions have $226M invested in Pioneer Acquisition I Corp in 2026 Q1 according to their latest regulatory filings, with 6 funds opening new positions, 8 increasing their positions, 10 reducing their positions, and 3 closing their positions.

New

Increased

Maintained

Reduced

Closed

100% more first-time investments, than exits

New positions opened: 6 | Existing positions closed: 3

14.86% more ownership

Funds ownership: 85.94% → 100.8% (+15%)

3% more funds holding

Funds holding: 59 → 61 (+2)

3% more capital invested

Capital invested by funds: $219M → $226M (+$7.57M)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

20% less repeat investments, than reductions

Existing positions increased: 8 | Existing positions reduced: 10

Holders

Holders Change

Holders Change %

+3.39%

% of All Funds

0.75%

Holding in Top 10

Holding in Top 10 Change

–

Holding in Top 10 Change %

–

% of All Funds

0.01%

New

Increased

Reduced

Closed

Calls

–

Puts

–

Net Calls

–

Net Calls Change

–

Top Buyers

1	WCMNY Westchester Capital Management (New York) Valhalla, New York	+$8.59M
2	WAM Wolverine Asset Management Chicago, Illinois	+$1.92M
3	GCL Glazer Capital LLC New York	+$1.62M
4	SAMU SONA Asset Management (US) New York	+$1.12M
5	Parallax Volatility Advisers San Francisco, California	+$955K

Top Sellers

1	MC Meteora Capital Boca Raton, Florida	-$5.53M
2	CS Clear Street New York	-$1.71M
3	PC Periscope Capital Toronto, Ontario, Canada	-$1.01M
4	PAMP Polar Asset Management Partners Toronto, Ontario, Canada	-$1.01M
5	MSU Mizuho Securities USA New York	-$514K

#	Name	Holding	Trade Value	Shares Change	Change in Stake
1	WCMNY 1 Westchester Capital Management (New York) Valhalla, New York	$12.8M	+$8.59M	+850,000	+208%
2	2 D.E. Shaw & Co New York	$12.7M	–	–	–
3	GCL 3 Glazer Capital LLC New York	$12.3M	+$1.62M	+159,993	+15%
4	MF 4 Magnetar Financial Evanston, Illinois	$10.2M	–	–	–
5	LA 5 Linden Advisors New York	$10.2M	–	–	–
6	AA 6 AQR Arbitrage Greenwich, Connecticut	$9.64M	-$366K	-36,227	-4%
7	WC 7 Wealthspring Capital West Harrison, New York	$8.52M	-$89.3K	-8,828	-1%
8	8 Two Sigma Investments New York	$8.08M	–	–	–
9	MI 9 MMCAP International Grand Cayman, Cayman Islands	$7.6M	–	–	–
10	WAM 10 Wolverine Asset Management Chicago, Illinois	$7.14M	+$1.92M	+190,272	+37%
11	11 Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada	$6.6M	–	–	–
12	RCM 12 Radcliffe Capital Management Bala Cynwyd, Pennsylvania	$6.38M	–	–	–
13	TCM 13 Tenor Capital Management New York	$6.08M	–	–	–
14	14 Verition Fund Management Greenwich, Connecticut	$5.34M	-$189K	-18,642	-3%
15	KIM 15 Karpus Investment Management Pittsford, New York	$5.09M	+$211K	+20,900	+4%
16	AIMCA 16 Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada	$5.08M	–	–	–
17	JG 17 Jain Global New York	$5.08M	-$212	-21	-0%
18	FTCM 18 First Trust Capital Management Chicago, Illinois	$5.07M	–	–	–
19	PMAM 19 Picton Mahoney Asset Management Toronto, Ontario, Canada	$5.07M	–	–	–
20	SCM 20 Shaolin Capital Management Miami, Florida	$5.07M	–	–	–
21	MP 21 Mangrove Partners Greenwich, Connecticut	$4.56M	–	–	–
22	OAC 22 OMERS Administration Corp Toronto, Ontario, Canada	$4.47M	–	–	–
23	COPPSERS 23 Commonwealth of Pennsylvania Public School Employees Retirement System Harrisburg, Pennsylvania	$4.06M	–	–	–
24	PAMP 24 Polar Asset Management Partners Toronto, Ontario, Canada	$4.05M	-$1.01M	-100,000	-20%
25	AC 25 Aristeia Capital Greenwich, Connecticut	$4.05M	–	–	–