Vault-13

PIONEER ACQUISITION I CORP PACH

CL A ORD SHS · Common Stock · CUSIP G7117W107

67 institutional holders +6 vs Q1 2026
22,514,58022.5m shares reported held*
$230.1mreported value*
7 new 7 added 9 reduced 1 sold out net bought ≈ $2.3m (+223.6k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $10.22.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0255075Q3 25: 44Q4 25: 59Q1 26: 61Q2 26: 6767Q3 25Q4 25Q1 26Q2 26
Numbers
QuarterHolders
Q3 202544
Q4 202559
Q1 202661
Q2 202667

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
20020Q4 25: 19 bought or addedQ4 25: 11 cut or sold outQ4 25Q1 26: 13 bought or addedQ1 26: 13 cut or sold outQ1 26Q2 26: 14 bought or addedQ2 26: 10 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q4 20251911
Q1 20261313
Q2 20261410

Biggest buyers

Meteora Capital, LLC New +272,969+273.0k
MIZUHO SECURITIES USA LLC New +183,497+183.5k
WOLVERINE ASSET MANAGEMENT LLC Added +85,684+85.7k
Logan Stone Capital, LLC New +60,737+60.7k
Karpus Management, Inc. Added +50,000+50.0k
Limestone Investment Advisors LP New +48,017+48.0k
Parallax Volatility Advisers, L.P. Added +35,508+35.5k
HRT FINANCIAL LP New +24,534+24.5k
PenderFund Capital Management Ltd. Added +22,972+23.0k
Arax Advisory Partners New +10,500+10.5k

Biggest sellers

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Reduced -200,000-200.0k
Shaolin Capital Management LLC Reduced -122,782-122.8k
Jain Global LLC Reduced -113,243-113.2k
Wealthspring Capital LLC Reduced -65,250-65.2k
TORONTO DOMINION BANK Reduced -43,875-43.9k
DLD Asset Management, LP Reduced -25,000-25.0k
Clear Street Group Inc. Reduced -9,595-9.6k
UBS Group AG Reduced -9,053-9.1k
FNY Investment Advisers, LLC Sold out -1,000-1.0k
MORGAN STANLEY Reduced -19-19

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
BARCLAYS PLC 13G · institution new · filed 2025-11-12 5.9% new 1.5m≈ $15.4m 2025-11-12
D. E. SHAW & CO, L.P. 13G · exempt (held before listing) new · filed 2026-05-15 5.7% new 1.3m≈ $12.8m 2026-05-15
Westchester Capital Management, LLC 13G · institution new · filed 2026-05-15 5.7% new 1.2m≈ $12.8m 2026-05-15
GLAZER CAPITAL, LLC 13G · institution new · filed 2026-05-14 5.5% new 1.2m≈ $12.4m 2026-05-14

Fell to 5% or below in the last year: AQR CAPITAL MANAGEMENT LLC (3.9%, 2025-11-12)

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Westchester Capital Management, LLC 0.65% of their portfolio VALHALLA, NY 1,258,6121.3m $12.9m $12.9m 0.65% Unchanged
2 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 1,252,3501.3m $12.8m $12.8m 0.01% Unchanged
3 GLAZER CAPITAL, LLC 0.31% of their portfolio New York, NY 1,210,6431.2m $12.4m $12.4m 0.31% Unchanged
4 Linden Advisors LP 0.05% of their portfolio New York, NY 1,000,0001.0m $10.2m $10.2m 0.05% Unchanged
5 Magnetar Financial LLC 0.09% of their portfolio EVANSTON, IL 1,000,0001.0m $10.2m $10.2m 0.09% Unchanged
6 AQR Arbitrage LLC 0.14% of their portfolio Greenwich, CT 956,895956.9k $9.8m $9.8m 0.14% Added +8.5k +8,514
7 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 797,500797.5k $8.2m $8.2m 0.01% Unchanged
8 WOLVERINE ASSET MANAGEMENT LLC 0.11% of their portfolio CHICAGO, IL 788,462788.5k $8.1m $8.1m 0.11% Added +85.7k +85,684
9 Wealthspring Capital LLC 1.77% of their portfolio WEST HARRISON, NY 776,258776.3k $7.9m $7.9m 1.77% Reduced -65.2k -65,250
10 MMCAP International Inc. SPC 0.65% of their portfolio GRAND CAYMAN, E9 750,000750.0k $7.7m $7.7m 0.65% Unchanged
11 Radcliffe Capital Management, L.P. 0.49% of their portfolio BALA CYNWYD, PA 629,549629.5k $6.4m $6.4m 0.49% Added +302 +302
12 TENOR CAPITAL MANAGEMENT Co., L.P. 0.09% of their portfolio NEW YORK, NY 600,000600.0k $6.1m $6.1m 0.09% Unchanged
13 Karpus Management, Inc. 0.16% of their portfolio Pittsford, NY 551,988552.0k $5.6m $5.6m 0.16% Added +50.0k +50,000
14 Verition Fund Management LLC 0.04% of their portfolio GREENWICH, CT 525,558525.6k $5.4m $5.4m 0.04% Unchanged
15 Alberta Investment Management Corp 0.03% of their portfolio EDMONTON, A0 500,000500.0k $5.1m $5.1m 0.03% Unchanged
16 PICTON MAHONEY ASSET MANAGEMENT 0.05% of their portfolio Toronto, A6 500,000500.0k $5.1m $5.1m 0.05% Unchanged
17 First Trust Capital Management L.P. 0.30% of their portfolio CHICAGO, IL 500,000500.0k $5.1m $5.1m 0.30% Unchanged
18 MANGROVE PARTNERS IM, LLC 0.30% of their portfolio Greenwich, CT 450,000450.0k $4.6m $4.6m 0.30% Unchanged
19 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio TORONTO, A6 450,000450.0k $4.6m $4.6m 0.01% Reduced -200.0k -200,000
20 OMERS ADMINISTRATION Corp 0.03% of their portfolio TORONTO, A6 440,000440.0k $4.5m $4.5m 0.03% Unchanged
21 ARISTEIA CAPITAL, L.L.C. 0.06% of their portfolio GREENWICH, CT 400,000400.0k $4.1m $4.1m 0.06% Unchanged
22 COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.02% of their portfolio HARRISBURG, PA 400,000400.0k $4.1m $4.1m 0.02% Unchanged
23 Polar Asset Management Partners Inc. 0.07% of their portfolio TORONTO, A6 400,000400.0k $4.1m $4.1m 0.07% Unchanged
24 Mint Tower Capital Management B.V. 0.48% of their portfolio AMSTERDAM, P7 400,000400.0k $4.1m $4.1m 0.48% Unchanged
25 Jain Global LLC 0.05% of their portfolio NEW YORK, NY 386,736386.7k $3.9m $3.9m 0.05% Reduced -113.2k -113,243
26 Shaolin Capital Management LLC 0.22% of their portfolio Miami, FL 377,218377.2k $3.9m $3.9m 0.22% Reduced -122.8k -122,782
27 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 348,493348.5k $3.6m $3.6m 0.00% Unchanged
28 WHITEBOX ADVISORS LLC 0.05% of their portfolio MINNEAPOLIS, MN 300,000300.0k $3.1m $3.1m 0.05% Unchanged
29 Periscope Capital Inc. 0.49% of their portfolio Toronto, A6 300,000300.0k $3.1m $3.1m 0.49% Unchanged
30 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 287,700287.7k $2.9m $2.9m 0.00% Added +1 +1
31 Meteora Capital, LLC 0.23% of their portfolio Boca Raton, FL 272,969273.0k $2.8m $2.8m 0.23% New
32 MOORE CAPITAL MANAGEMENT, LP 0.06% of their portfolio NEW YORK, NY 250,000250.0k $2.6m $2.6m 0.06% Unchanged
33 Ghisallo Capital Management LLC 0.05% of their portfolio BOSTON, MA 250,000250.0k $2.6m $2.6m 0.05% Unchanged
34 O'Connor Alternative Investments LLC 0.19% of their portfolio NEW YORK, NY 250,000250.0k $2.6m $2.6m 0.19% Unchanged
35 RIVERNORTH CAPITAL MANAGEMENT, LLC 0.12% of their portfolio WEST PALM BEACH, FL 249,758249.8k $2.6m $2.6m 0.12% Unchanged
36 Hudson Bay Capital Management LP 0.01% of their portfolio STAMFORD, CT 246,000246.0k $2.5m $2.5m 0.01% Unchanged
37 CSS LLC/IL 0.10% of their portfolio CHICAGO, IL 210,988211.0k $2.2m $2.2m 0.10% Unchanged
38 MIZUHO SECURITIES USA LLC 0.02% of their portfolio NEW YORK, NY 183,497183.5k $1.9m $1.9m 0.02% New
39 Context Capital Management, LLC 0.03% of their portfolio LAJOLLA, CA 150,000150.0k $1.5m $1.5m 0.03% Unchanged
40 TIG Advisors, LLC 0.07% of their portfolio New York, NY 150,000150.0k $1.5m $1.5m 0.07% Unchanged
41 BERKLEY W R CORP 0.07% of their portfolio Greenwich, CT 148,726148.7k $1.5m $1.5m 0.07% Unchanged
42 Clear Street Group Inc. 0.00% of their portfolio NEW YORK, NY 139,861139.9k $1.4m $1.4m 0.00% Reduced -9.6k -9,595
43 Parallax Volatility Advisers, L.P. 0.05% of their portfolio San Francisco, CA 129,909129.9k $1.3m $1.3m 0.05% Added +35.5k +35,508
44 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 125,000125.0k $1.3m $1.3m 0.00% Reduced -43.9k -43,875
45 SONA ASSET MANAGEMENT (US) LLC 0.04% of their portfolio NEW YORK, NY 111,059111.1k $1.1m $1.1m 0.04% Unchanged
46 Lineage Point Capital LP 0.22% of their portfolio PALM BEACH, FL 106,805106.8k $1.1m $1.1m 0.22% Unchanged
47 Dakota Wealth Management 0.02% of their portfolio PALM BEACH GARDENS, FL 104,100104.1k $1.1m $1.1m 0.02% Unchanged
48 DLD Asset Management, LP 0.09% of their portfolio NEW YORK, NY 102,737102.7k $1.1m $1.1m 0.09% Reduced -25.0k -25,000
49 HEIGHTS CAPITAL MANAGEMENT, INC 0.24% of their portfolio SAN FRANCISCO, CA 100,000100.0k $1.0m $1.0m 0.24% Unchanged
50 Governors Lane LP 0.10% of their portfolio NEW YORK, NY 100,000100.0k $1.0m $1.0m 0.10% Unchanged
51 BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 83,39183.4k $853.1k $853.1k 0.02% Unchanged
52 GRITSTONE ASSET MANAGEMENT LLC 0.68% of their portfolio Bethesda, MD 69,32469.3k $709.2k $709.2k 0.68% Unchanged
53 Logan Stone Capital, LLC 0.13% of their portfolio CHICAGO, IL 60,73760.7k $621.3k $621.3k 0.13% New
54 Timelo Investment Management Inc. 0.77% of their portfolio Aurora, A6 60,00060.0k $613.8k $613.8k 0.77% Unchanged
55 Centiva Capital, LP 0.02% of their portfolio New York, NY 50,00050.0k $510.5k $510.5k 0.02% Unchanged
56 Limestone Investment Advisors LP 0.25% of their portfolio NEW YORK, NY 48,01748.0k $491.2k $491.2k 0.25% New
57 Kepos Capital LP 0.66% of their portfolio NEW YORK, NY 47,10047.1k $482.0k $482.0k 0.66% Unchanged
58 PenderFund Capital Management Ltd. 0.05% of their portfolio VANCOUVER, A1 38,17238.2k $389.7k $389.7k 0.05% Added +23.0k +22,972
59 Stoic Point Capital Management LLC 0.29% of their portfolio PALO ALTO, CA 33,77533.8k $345.5k $345.5k 0.29% Unchanged
60 ABC ARBITRAGE SA 0.03% of their portfolio PARIS, I0 25,00025.0k $255.8k $255.8k 0.03% Unchanged
61 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 24,53424.5k $250.0k $250.0k 0.00% New
62 L1 Global Manager Pty Ltd 0.20% of their portfolio Melbourne, C3 24,40024.4k $249.6k $249.6k 0.20% Unchanged
63 Arax Advisory Partners 0.00% of their portfolio NEW YORK, NY 10,50010.5k $107.4k $107.4k 0.00% New
64 Virtu Financial LLC 0.00% of their portfolio New York, NY 10,20310.2k $104.0k $104.0k 0.00% New
65 DELTEC ASSET MANAGEMENT LLC 0.02% of their portfolio New York, NY 10,00010.0k $102.3k $102.3k 0.02% Unchanged
66 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 4949 $501 $501 0.00% Reduced -19 -19
67 UBS Group AG 0.00% of their portfolio ZURICH, V8 77 $72 $72 0.00% Reduced -9.1k -9,053