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PACHU

Pioneer Acquisition I Corp Units
PACHU

29 hedge funds and large institutions have $74.7M invested in Pioneer Acquisition I Corp Units in 2025 Q3 according to their latest regulatory filings, with 1 funds opening new positions, 5 increasing their positions, 8 reducing their positions, and 41 closing their positions.

New
Increased
Maintained
Reduced
Closed

38% less repeat investments, than reductions

Existing positions increased: 5 | Existing positions reduced: 8

58% less funds holding

Funds holding: 69 → 29 (-40)

69% less capital invested

Capital invested by funds: $242M → $74.7M (-$167M)

76.04% less ownership

Funds ownership: 109.83% → 33.79% (-76%)

98% less first-time investments, than exits

New positions opened: 1 | Existing positions closed: 41

100% less funds holding in top 10

Funds holding in top 10: 1 → 0 (-1)

Holders
29
Holders Change
-40
Holders Change %
-57.97%
% of All Funds
0.38%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
1
Increased
5
Reduced
8
Closed
41
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
WCMNY
Westchester Capital Management (New York)
New York
+$6.02M
2
JG
Jain Global
New York
+$1.15M
3
Parallax Volatility Advisers
Parallax Volatility Advisers
California
+$238K
4
RC
Rangeley Capital
Connecticut
+$222K
5
PCM
PenderFund Capital Management
British Columbia, Canada
+$124K

Top Sellers

Rank Fund Capital Flow
1
AA
AQR Arbitrage
Connecticut
-$12.9M
2
GCL
Glazer Capital LLC
New York
-$10.6M
3
Two Sigma Investments
Two Sigma Investments
New York
-$7.98M
4
LA
Linden Advisors
New York
-$7.51M
5
WC
Wealthspring Capital
New York
-$6.67M
Name Holding Trade Value Shares
Change 		Change in
Stake
MF
1
Magnetar Financial
Illinois
$10.1M – – –
WCMNY
2
Westchester Capital Management (New York)
New York
$8.54M +$6.02M +600,000 +240%
LP
3
LMR Partners
United Kingdom
$7.54M – – –
MI
4
MMCAP International
Cayman Islands
$7.54M – – –
HIM
5
HGC Investment Management
Ontario, Canada
$7.47M – – –
AIMCA
6
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$5.03M – – –
JG
7
Jain Global
New York
$5.03M +$1.15M +114,418 +30%
OAC
8
OMERS Administration Corp
Ontario, Canada
$4.42M – – –
MTCM
9
Mint Tower Capital Management
Netherlands
$4.02M – – –
Toronto Dominion Bank
10
Toronto Dominion Bank
Ontario, Canada
$3.65M -$3.38M -337,300 -48%
AGM
11
Alpine Global Management
New York
$2.26M -$752K -75,000 -25%
TAL
12
TIG Advisors LLC
New York
$1.51M – – –
SCS
13
Syquant Capital SAS
France
$1.11M – – –
HCM
14
Heights Capital Management
California
$1M – – –
JP Morgan Chase
15
JP Morgan Chase
New York
$1M – – –
DAM
16
DLD Asset Management
New York
$1M – – –
RCM
17
Rivernorth Capital Management
Florida
$670K -$1.84M -183,093 -73%
TIM
18
Timelo Investment Management
Ontario, Canada
$603K – – –
Parallax Volatility Advisers
19
Parallax Volatility Advisers
California
$590K +$238K +23,744 +68%
CF
20
Cantor Fitzgerald
New York
$371K -$3.51M -350,000 -90%
HF
21
HRT Financial
New York
$333K +$103K +10,291 +45%
RAM
22
Readystate Asset Management
Illinois
$316K -$20 -2 -0%
YCM
23
Yakira Capital Management
Connecticut
$251K – – –
RC
24
Rangeley Capital
Connecticut
$223K +$222K +22,157 New
PCM
25
PenderFund Capital Management
British Columbia, Canada
$175K +$124K +12,400 +248%
1
2 3

PACHU Hedge Fund Activity: Q3 2025 in Review

29 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Pioneer Acquisition I Corp Units (PACHU) for Q3 2025, worth a combined $74.7M — down 69% from $242M a quarter earlier.

Sellers outnumbered buyers: 41 funds closed out of PACHU and 1 opened new positions — a net loss of 40 holders — while 8 trimmed existing stakes and 5 added.

The largest buyer was Westchester Capital Management (New York), adding an estimated $6.02M. The largest seller was AQR Arbitrage, exiting entirely with an estimated $12.9M sold.

  • 29 institutional investors held Pioneer Acquisition I Corp Units (PACHU) as of Q3 2025, down from 69 in Q2 2025.
  • Funds reported $74.7M of Pioneer Acquisition I Corp Units stock for Q3 2025, down 69% quarter-over-quarter.
  • 1 fund opened new Pioneer Acquisition I Corp Units positions in Q3 2025 and 41 closed out, a net change of -40 holders.
  • The largest Pioneer Acquisition I Corp Units buyer in Q3 2025 was Westchester Capital Management (New York), an estimated $6.02M added.
  • The largest Pioneer Acquisition I Corp Units seller in Q3 2025 was AQR Arbitrage, an estimated $12.9M sold.

Based on aggregated 13F filings for Q3 2025.