Vault-13

DUNE ACQUISITION CORP II CCAQ

SHS CL A · Common Stock · CUSIP G2867S109

47 institutional holders +3 vs Q1 2026
14,163,78714.2m shares reported held*
$146.8mreported value*
3 new 7 added 11 reduced 0 sold out net bought ≈ $5.3m (+562.8k 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 ≈ $10.36.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0204060Q2 25: 31Q3 25: 37Q4 25: 42Q1 26: 44Q2 26: 4747Q2 25Q3 25Q4 25Q1 26Q2 26
Numbers
QuarterHolders
Q2 202531
Q3 202537
Q4 202542
Q1 202644
Q2 202647

Buyers vs sellers

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

Bought or addedCut or sold out
20020Q3 25: 16 bought or addedQ3 25: 8 cut or sold outQ3 25Q4 25: 11 bought or addedQ4 25: 7 cut or sold outQ4 25Q1 26: 9 bought or addedQ1 26: 14 cut or sold outQ1 26Q2 26: 10 bought or addedQ2 26: 11 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 2025168
Q4 2025117
Q1 2026914
Q2 20261011

Biggest buyers

MIZUHO SECURITIES USA LLC Added +322,648+322.6k
Bulldog Investors, LLP Added +179,935+179.9k
HRT FINANCIAL LP New +100,001+100.0k
Clear Street Group Inc. Added +58,122+58.1k
StoneX Group Inc. New +48,452+48.5k
BERKLEY W R CORP Added +34,818+34.8k
RLH Capital LLC New +16,968+17.0k
HIGHBRIDGE CAPITAL MANAGEMENT LLC Added +16,774+16.8k
AQR Arbitrage LLC Added +2,400+2.4k
Radcliffe Capital Management, L.P. Added +2+2

Biggest sellers

Meteora Capital, LLC Reduced -65,970-66.0k
CITADEL ADVISORS LLC Reduced -49,994-50.0k
Shaolin Capital Management LLC Reduced -40,902-40.9k
Schonfeld Strategic Advisors LLC Reduced -29,494-29.5k
UBS Group AG Reduced -17,712-17.7k
GLAZER CAPITAL, LLC Reduced -7,183-7.2k
TORONTO DOMINION BANK Reduced -5,000-5.0k
Warberg Asset Management LLC Reduced -702-702
HEIGHTS CAPITAL MANAGEMENT, INC Reduced -303-303
WOLVERINE ASSET MANAGEMENT LLC Reduced -42-42

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
ARISTEIA CAPITAL, L.L.C. 13G · institution new · filed 2025-08-14 7.6% new 1.1m≈ $11.5m 2025-08-14
Magnetar Financial LLC 13G · institution new · filed 2025-08-08 5.9% new 850.0k≈ $8.9m 2025-08-08

Fell to 5% or below in the last year: BARCLAYS PLC (4.3%, 2026-02-11), 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 ARISTEIA CAPITAL, L.L.C. 0.18% of their portfolio GREENWICH, CT 1,100,0001.1m $11.5m $11.5m 0.18% Unchanged
2 TENOR CAPITAL MANAGEMENT Co., L.P. 0.15% of their portfolio NEW YORK, NY 1,000,0001.0m $10.4m $10.4m 0.15% Unchanged
3 Magnetar Financial LLC 0.08% of their portfolio EVANSTON, IL 850,000850.0k $8.9m $8.9m 0.08% Unchanged
4 First Trust Capital Management L.P. 0.43% of their portfolio CHICAGO, IL 699,992700.0k $7.3m $7.3m 0.43% Unchanged
5 BERKLEY W R CORP 0.35% of their portfolio Greenwich, CT 683,778683.8k $7.1m $7.1m 0.35% Added +34.8k +34,818
6 Westchester Capital Management, LLC 0.35% of their portfolio VALHALLA, NY 666,477666.5k $7.0m $7.0m 0.35% Unchanged
7 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 598,000598.0k $6.2m $6.2m 0.00% Unchanged
8 Polar Asset Management Partners Inc. 0.11% of their portfolio TORONTO, A6 574,900574.9k $6.0m $6.0m 0.11% Unchanged
9 WOLVERINE ASSET MANAGEMENT LLC 0.08% of their portfolio CHICAGO, IL 570,310570.3k $5.9m $5.9m 0.08% Reduced -42 -42
10 AQR Arbitrage LLC 0.08% of their portfolio Greenwich, CT 547,354547.4k $5.7m $5.7m 0.08% Added +2.4k +2,400
11 MIZUHO SECURITIES USA LLC 0.05% of their portfolio NEW YORK, NY 510,043510.0k $5.3m $5.3m 0.05% Added +322.6k +322,648
12 GLAZER CAPITAL, LLC 0.12% of their portfolio New York, NY 474,979475.0k $5.0m $5.0m 0.12% Reduced -7.2k -7,183
13 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 453,124453.1k $4.7m $4.7m 0.00% Unchanged
14 MANGROVE PARTNERS IM, LLC 0.31% of their portfolio Greenwich, CT 449,995450.0k $4.7m $4.7m 0.31% Unchanged
15 Bulldog Investors, LLP 0.99% of their portfolio SADDLE BROOK, NJ 429,640429.6k $4.5m $4.5m 0.99% Added +179.9k +179,935
16 Radcliffe Capital Management, L.P. 0.34% of their portfolio BALA CYNWYD, PA 424,608424.6k $4.4m $4.4m 0.34% Added +2 +2
17 WHITEBOX ADVISORS LLC 0.07% of their portfolio MINNEAPOLIS, MN 400,000400.0k $4.2m $4.2m 0.07% Unchanged
18 COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.02% of their portfolio HARRISBURG, PA 350,000350.0k $3.7m $3.7m 0.02% Unchanged
19 PICTON MAHONEY ASSET MANAGEMENT 0.03% of their portfolio Toronto, A6 350,000350.0k $3.7m $3.7m 0.03% Unchanged
20 RIVERNORTH CAPITAL MANAGEMENT, LLC 0.17% of their portfolio WEST PALM BEACH, FL 337,760337.8k $3.5m $3.5m 0.17% Unchanged
21 O'Connor Alternative Investments LLC 0.19% of their portfolio NEW YORK, NY 250,000250.0k $2.6m $2.6m 0.19% Unchanged
22 Shaolin Capital Management LLC 0.14% of their portfolio Miami, FL 240,000240.0k $2.5m $2.5m 0.14% Reduced -40.9k -40,902
23 Clear Street Group Inc. 0.01% of their portfolio NEW YORK, NY 238,170238.2k $1.6m $1.6m 0.01% Added +58.1k +58,122
24 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 206,104206.1k $2.1m $2.1m 0.00% Unchanged
25 Hudson Bay Capital Management LP 0.01% of their portfolio STAMFORD, CT 200,000200.0k $2.1m $2.1m 0.01% Unchanged
26 Verition Fund Management LLC 0.01% of their portfolio GREENWICH, CT 200,000200.0k $2.1m $2.1m 0.01% Unchanged
27 SONA ASSET MANAGEMENT (US) LLC 0.06% of their portfolio NEW YORK, NY 154,162154.2k $1.6m $1.6m 0.06% Unchanged
28 Schonfeld Strategic Advisors LLC 0.01% of their portfolio NEW YORK, NY 150,385150.4k $1.6m $1.6m 0.01% Reduced -29.5k -29,494
29 Karpus Management, Inc. 0.04% of their portfolio Pittsford, NY 141,000141.0k $1.5m $1.5m 0.04% Unchanged
30 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 100,001100.0k $1.0m $1.0m 0.00% New
31 Context Capital Management, LLC 0.02% of their portfolio LAJOLLA, CA 100,000100.0k $1.0m $1.0m 0.02% Unchanged
32 MOORE CAPITAL MANAGEMENT, LP 0.02% of their portfolio NEW YORK, NY 100,000100.0k $1.0m $1.0m 0.02% Unchanged
33 Centiva Capital, LP 0.04% of their portfolio New York, NY 100,000100.0k $1.0m $1.0m 0.04% Unchanged
34 Lineage Point Capital LP 0.21% of their portfolio PALM BEACH, FL 100,000100.0k $1.0m $1.0m 0.21% Unchanged
35 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 95,00095.0k $990.9k $990.9k 0.00% Reduced -5.0k -5,000
36 L1 Global Manager Pty Ltd 0.63% of their portfolio Melbourne, C3 75,00075.0k $782.2k $782.2k 0.63% Unchanged
37 StoneX Group Inc. 0.02% of their portfolio NEW YORK, NY 48,45248.5k $501.0k $501.0k 0.02% New
38 Meteora Capital, LLC 0.04% of their portfolio Boca Raton, FL 48,38248.4k $504.6k $504.6k 0.04% Reduced -66.0k -65,970
39 HEIGHTS CAPITAL MANAGEMENT, INC 0.07% of their portfolio SAN FRANCISCO, CA 29,69729.7k $309.7k $309.7k 0.07% Reduced -303 -303
40 Warberg Asset Management LLC 0.09% of their portfolio WINNETKA, IL 27,60127.6k $288.2k $288.2k 0.09% Reduced -702 -702
41 ABC ARBITRAGE SA 0.02% of their portfolio PARIS, I0 20,73320.7k $216.2k $216.2k 0.02% Unchanged
42 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 20,30020.3k $211.7k $211.7k 0.00% Unchanged
43 HIGHBRIDGE CAPITAL MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 17,57417.6k $182.8k $182.8k 0.01% Added +16.8k +16,774
44 RLH Capital LLC 0.08% of their portfolio Great Neck, NY 16,96817.0k $177.1k $177.1k 0.08% New
45 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 11,24011.2k $117.2k $117.2k 0.00% Reduced -50.0k -49,994
46 UBS Group AG 0.00% of their portfolio ZURICH, V8 1,9902.0k $20.8k $20.8k 0.00% Reduced -17.7k -17,712
47 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 6868 $709 $709 0.00% Reduced -13 -13