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PACHU

Pioneer Acquisition I Corp Units
PACHU

15 hedge funds and large institutions have $32.1M invested in Pioneer Acquisition I Corp Units in 2025 Q4 according to their latest regulatory filings, with 1 funds opening new positions, 1 increasing their positions, 3 reducing their positions, and 15 closing their positions.

New
Increased
Maintained
Reduced
Closed

19.49% less ownership

Funds ownership: 33.79% → 14.3% (-19%)

48% less funds holding

Funds holding: 29 → 15 (-14)

57% less capital invested

Capital invested by funds: $74.7M → $32.1M (-$42.6M)

67% less repeat investments, than reductions

Existing positions increased: 1 | Existing positions reduced: 3

93% less first-time investments, than exits

New positions opened: 1 | Existing positions closed: 15

Holders
15
Holders Change
-14
Holders Change %
-48.28%
% of All Funds
0.18%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
1
Increased
1
Reduced
3
Closed
15
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
CS
Clear Street
New York
+$142K

Top Sellers

Rank Fund Capital Flow
1
MF
Magnetar Financial
Illinois
-$10.1M
2
MI
MMCAP International
Cayman Islands
-$7.54M
3
AIMCA
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
-$5.03M
4
JG
Jain Global
New York
-$5.03M
5
OAC
OMERS Administration Corp
Ontario, Canada
-$4.42M
Name Holding Trade Value Shares
Change 		Change in
Stake
WCMNY
1
Westchester Capital Management (New York)
New York
$8.63M – – –
LP
2
LMR Partners
United Kingdom
$7.67M – – –
HIM
3
HGC Investment Management
Ontario, Canada
$7.59M – – –
Toronto Dominion Bank
4
Toronto Dominion Bank
Ontario, Canada
$3.71M – – –
SCS
5
Syquant Capital SAS
France
$1.12M – – –
JP Morgan Chase
6
JP Morgan Chase
New York
$1.02M – – –
TIM
7
Timelo Investment Management
Ontario, Canada
$613K – – –
LPC
8
Lineage Point Capital
Florida
$521K +$519K +50,867 New
RAM
9
Readystate Asset Management
Illinois
$322K – – –
YCM
10
Yakira Capital Management
Connecticut
$256K – – –
HF
11
HRT Financial
New York
$255K -$83.2K -8,158 -25%
RC
12
Rangeley Capital
Connecticut
$226K -$122 -12 -0.1%
CS
13
Clear Street
New York
$145K +$142K +13,927 +5,977%
LIM
14
Longfellow Investment Management
Massachusetts
$5.11K – – –
UBS Group
15
UBS Group
Switzerland
$102 -$5.51K -540 -98%
MF
16
Magnetar Financial
Illinois
– -$10.1M -1,000,000 Closed
MI
17
MMCAP International
Cayman Islands
– -$7.54M -750,000 Closed
AIMCA
18
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
– -$5.03M -500,000 Closed
JG
19
Jain Global
New York
– -$5.03M -500,000 Closed
OAC
20
OMERS Administration Corp
Ontario, Canada
– -$4.42M -440,000 Closed
MTCM
21
Mint Tower Capital Management
Netherlands
– -$4.02M -400,000 Closed
AGM
22
Alpine Global Management
New York
– -$2.26M -225,000 Closed
TAL
23
TIG Advisors LLC
New York
– -$1.51M -150,000 Closed
HCM
24
Heights Capital Management
California
– -$1M -100,000 Closed
DAM
25
DLD Asset Management
New York
– -$1M -99,999 Closed
1
2

PACHU Hedge Fund Activity: Q4 2025 in Review

15 of the 8,228 institutional investors tracked by Wall St. Rank reported a position in Pioneer Acquisition I Corp Units (PACHU) for Q4 2025, worth a combined $32.1M — down 57% from $74.7M a quarter earlier.

Sellers outnumbered buyers: 15 funds closed out of PACHU and 1 opened new positions — a net loss of 14 holders — while 3 trimmed existing stakes and 1 added.

The largest buyer was Clear Street, adding an estimated $142K. The largest seller was Magnetar Financial, exiting entirely with an estimated $10.1M sold.

  • 15 institutional investors held Pioneer Acquisition I Corp Units (PACHU) as of Q4 2025, down from 29 in Q3 2025.
  • Funds reported $32.1M of Pioneer Acquisition I Corp Units stock for Q4 2025, down 57% quarter-over-quarter.
  • 1 fund opened new Pioneer Acquisition I Corp Units positions in Q4 2025 and 15 closed out, a net change of -14 holders.
  • The largest Pioneer Acquisition I Corp Units buyer in Q4 2025 was Clear Street, an estimated $142K added.
  • The largest Pioneer Acquisition I Corp Units seller in Q4 2025 was Magnetar Financial, an estimated $10.1M sold.

Based on aggregated 13F filings for Q4 2025.