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PACH

Pioneer Acquisition I Corp
PACH

59 hedge funds and large institutions have $219M invested in Pioneer Acquisition I Corp in 2025 Q4 according to their latest regulatory filings, with 17 funds opening new positions, 5 increasing their positions, 10 reducing their positions, and 1 closing their positions.

New
Increased
Maintained
Reduced
Closed

1,600% more first-time investments, than exits

New positions opened: 17 | Existing positions closed: 1

34% more funds holding

Funds holding: 44 → 59 (+15)

25% more capital invested

Capital invested by funds: $174M → $219M (+$44.3M)

16.67% more ownership

Funds ownership: 69.27% → 85.94% (+17%)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

50% less repeat investments, than reductions

Existing positions increased: 5 | Existing positions reduced: 10

Holders
59
Holders Change
+15
Holders Change %
+34.09%
% of All Funds
0.71%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
17
Increased
5
Reduced
10
Closed
1
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
MF
Magnetar Financial
Illinois
+$10.1M
2
MI
MMCAP International
Cayman Islands
+$7.55M
3
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$5.64M
4
MC
Meteora Capital
Florida
+$5.54M
5
AIMCA
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
+$5.03M

Top Sellers

Rank Fund Capital Flow
1
CS
Clear Street
New York
-$4.07M
2
MSU
Mizuho Securities USA
New York
-$2.52M
3
VF
Virtu Financial
New York
-$2.28M
4
Toronto Dominion Bank
Toronto Dominion Bank
Ontario, Canada
-$2.25M
5
SCM
Shaolin Capital Management
Florida
-$2.01M
Name Holding Trade Value Shares
Change 		Change in
Stake
AC
26
Aristeia Capital
Connecticut
$4.02M – – –
COPPSERS
27
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$4.02M – – –
MTCM
28
Mint Tower Capital Management
Netherlands
$4.02M +$4.03M +400,000 New
CS
29
Clear Street
New York
$3.2M -$4.07M -404,615 -56%
BNP Paribas Financial Markets
30
BNP Paribas Financial Markets
France
$3.1M – – –
WA
31
Whitebox Advisors
Minnesota
$3.02M – – –
Millennium Management
32
Millennium Management
New York
$2.71M -$156K -15,501 -5%
GCM
33
Ghisallo Capital Management
Massachusetts
$2.52M – – –
UOC
34
UBS O'Connor
Illinois
$2.52M – – –
MCM
35
Moore Capital Management
New York
$2.51M – – –
RCM
36
Rivernorth Capital Management
Florida
$2.51M +$671K +66,665 +36%
Hudson Bay Capital Management
37
Hudson Bay Capital Management
Connecticut
$2.47M – – –
CL
38
CSS LLC
Illinois
$2.13M – – –
CCM
39
Context Capital Management
California
$1.51M – – –
TAL
40
TIG Advisors LLC
New York
$1.51M +$1.51M +150,000 New
WRBC
41
W.R. Berkley Corp
Connecticut
$1.49M – – –
Toronto Dominion Bank
42
Toronto Dominion Bank
Ontario, Canada
$1.46M -$2.25M -223,629 -61%
DAM
43
DLD Asset Management
New York
$1.28M +$1.29M +127,737 New
DWM
44
Dakota Wealth Management
Florida
$1.1M – – –
LPC
45
Lineage Point Capital
Florida
$1.07M +$1.08M +106,805 New
HCM
46
Heights Capital Management
California
$1.01M +$1.01M +100,000 New
GL
47
Governors Lane
New York
$1M – – –
BFM
48
Boothbay Fund Management
New York
$838K – – –
GAM
49
Gritstone Asset Management
Maryland
$697K – – –
MSU
50
Mizuho Securities USA
New York
$514K -$2.52M -250,378 -83%
1
2
3

PACH Hedge Fund Activity: Q4 2025 in Review

59 of the 8,256 institutional investors tracked by Wall St. Rank reported a position in Pioneer Acquisition I Corp (PACH) for Q4 2025, worth a combined $219M — up 25% from $174M a quarter earlier.

Buyers outnumbered sellers: 17 funds opened new PACH positions and 1 closed out — a net gain of 16 holders — while 5 added to existing stakes and 10 trimmed.

The largest buyer was Magnetar Financial, opening a new position worth an estimated $10.1M. The largest seller was Clear Street, cutting an estimated $4.07M.

  • 59 institutional investors held Pioneer Acquisition I Corp (PACH) as of Q4 2025, up from 44 in Q3 2025.
  • Funds reported $219M of Pioneer Acquisition I Corp stock for Q4 2025, up 25% quarter-over-quarter.
  • 17 funds opened new Pioneer Acquisition I Corp positions in Q4 2025 and 1 closed out, a net change of +16 holders.
  • The largest Pioneer Acquisition I Corp buyer in Q4 2025 was Magnetar Financial, an estimated $10.1M added.
  • The largest Pioneer Acquisition I Corp seller in Q4 2025 was Clear Street, an estimated $4.07M sold.

Based on aggregated 13F filings for Q4 2025.