Vault-13

SILVERBOX CORP IV SBXDF

SHS CL A · Common Stock · CUSIP G81354105

48 institutional holders +2 vs Q1 2026
21,449,36121.4m shares reported held*
$231.6mreported value*
4 new 8 added 11 reduced 2 sold out net bought ≈ $20.5m (+1.9m 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 ($7.3m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $10.80.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0204060Q4 24: 26Q1 25: 36Q2 25: 50Q3 25: 50Q4 25: 46Q1 26: 46Q2 26: 4848Q4 24Q2 25Q4 25Q2 26
Numbers
QuarterHolders
Q4 202426
Q1 202536
Q2 202550
Q3 202550
Q4 202546
Q1 202646
Q2 202648

Buyers vs sellers

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

Bought or addedCut or sold out
40040Q1 25: 17 bought or addedQ1 25: 7 cut or sold outQ1 25Q2 25: 28 bought or addedQ2 25: 15 cut or sold outQ2 25Q3 25: 16 bought or addedQ3 25: 21 cut or sold outQ3 25Q4 25: 15 bought or addedQ4 25: 21 cut or sold outQ4 25Q1 26: 15 bought or addedQ1 26: 14 cut or sold outQ1 26Q2 26: 12 bought or addedQ2 26: 13 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q1 2025177
Q2 20252815
Q3 20251621
Q4 20251521
Q1 20261514
Q2 20261213

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$20k$40k$60k$80kQ3 25 calls: $66.1kQ3 25 puts: $0Q3 25P/C 0.00Q4 25 calls: $0Q4 25 puts: $0Q4 25P/C —Q1 26 calls: $0Q1 26 puts: $0Q1 26P/C —Q2 26 calls: $0Q2 26 puts: $0Q2 26P/C —
Numbers
QuarterCallsPutsP/C
Q3 2025$66.1k$00.00
Q4 2025$0$0—
Q1 2026$0$0—
Q2 2026$0$0—

Biggest buyers

MIZUHO SECURITIES USA LLC Added +1,840,442+1.8m
BERKLEY W R CORP Added +415,554+415.6k
HIGHBRIDGE CAPITAL MANAGEMENT LLC Added +102,623+102.6k
Meteora Capital, LLC Added +86,092+86.1k
TORONTO DOMINION BANK Added +71,274+71.3k
Quarry LP Added +58,403+58.4k
StoneX Group Inc. New +48,554+48.6k
Alyeska Investment Group, L.P. New +24,500+24.5k
BOOTHBAY FUND MANAGEMENT, LLC New +11,719+11.7k
Arax Advisory Partners New +4,221+4.2k

Biggest sellers

AQR Arbitrage LLC Reduced -322,975-323.0k
Verition Fund Management LLC Sold out -145,142-145.1k
RLH Capital LLC Reduced -94,227-94.2k
DLD Asset Management, LP Reduced -71,073-71.1k
Periscope Capital Inc. Reduced -50,000-50.0k
Crossingbridge Advisors, LLC Reduced -48,400-48.4k
Shaolin Capital Management LLC Reduced -38,711-38.7k
CITADEL ADVISORS LLC Reduced -794-794
Clear Street Group Inc. Reduced -100-100
GOLDMAN SACHS GROUP INC Reduced -92-92

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
SilverBox Sponsor IV LLC 13G · exempt (held before listing) new · filed 2025-02-13 21.4% new 5.5m≈ $59.0m 2025-02-13
BERKLEY W R CORP 13G · institution +2.0 pts · filed 2026-08-06 9.4% +2.0 pts 1.9m≈ $20.8m 2026-08-06
MIZUHO FINANCIAL GROUP INC 13G · institution new · filed 2026-02-12 8.0% new 1.6m≈ $17.8m 2026-02-12
CALAMOS INVESTMENT TRUST/IL 13G · exempt (held before listing) new · filed 2026-10-09 7.8% new 500.0k≈ $5.4m 2026-10-09
BARCLAYS PLC 13G · institution +2.3 pts · filed 2026-05-14 7.0% +2.3 pts 1.4m≈ $15.5m 2026-05-14

Fell to 5% or below in the last year: AQR CAPITAL MANAGEMENT LLC (5.0%, 2026-08-12), HIGHBRIDGE CAPITAL MANAGEMENT LLC (1.4%, 2025-11-14)

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 MIZUHO SECURITIES USA LLC 0.37% of their portfolio NEW YORK, NY 3,637,3893.6m $39.0m $39.0m 0.37% Added +1.8m +1,840,442
2 Linden Advisors LP 0.11% of their portfolio New York, NY 2,000,0002.0m $21.6m $21.6m 0.11% Unchanged
3 BERKLEY W R CORP 1.02% of their portfolio Greenwich, CT 1,930,1271.9m $20.9m $20.9m 1.02% Added +415.6k +415,554
4 Polar Asset Management Partners Inc. 0.30% of their portfolio TORONTO, A6 1,508,0051.5m $16.3m $16.3m 0.30% Unchanged
5 AQR Arbitrage LLC 0.16% of their portfolio Greenwich, CT 1,012,4011.0m $10.9m $10.9m 0.16% Reduced -323.0k -322,975
6 WOLVERINE ASSET MANAGEMENT LLC 0.14% of their portfolio CHICAGO, IL 993,816993.8k $10.7m $10.7m 0.14% Reduced -1 -1
7 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 989,397989.4k $10.7m $10.7m 0.01% Unchanged
8 MMCAP International Inc. SPC 0.90% of their portfolio GRAND CAYMAN, E9 980,000980.0k $10.6m $10.6m 0.90% Unchanged
9 Crossingbridge Advisors, LLC 1.78% of their portfolio PLEASANTVILLE, NY 928,613928.6k $10.0m $10.0m 1.78% Reduced -48.4k -48,400
10 PICTON MAHONEY ASSET MANAGEMENT 0.08% of their portfolio Toronto, A6 824,899824.9k $8.9m $8.9m 0.08% Unchanged
11 RiverPark Advisors, LLC 3.35% of their portfolio NEW YORK, NY 678,613678.6k $7.3m $7.3m 3.35% Unchanged
12 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 606,074606.1k $6.6m $6.6m 0.00% Reduced -92 -92
13 Magnetar Financial LLC 0.05% of their portfolio EVANSTON, IL 520,823520.8k $5.6m $5.6m 0.05% Unchanged
14 Calamos Advisors LLC 0.02% of their portfolio NAPERVILLE, IL 500,000500.0k $5.4m $5.4m 0.02% Unchanged
15 LMR Partners LLP 0.04% of their portfolio LONDON, X0 500,000500.0k $5.4m $5.4m 0.04% Unchanged
16 First Trust Capital Management L.P. 0.28% of their portfolio CHICAGO, IL 445,168445.2k $4.8m $4.8m 0.28% Unchanged
17 ARISTEIA CAPITAL, L.L.C. 0.06% of their portfolio GREENWICH, CT 336,123336.1k $3.6m $3.6m 0.06% Unchanged
18 Westchester Capital Management, LLC 0.18% of their portfolio VALHALLA, NY 325,485325.5k $3.5m $3.5m 0.18% Unchanged
19 RIVERNORTH CAPITAL MANAGEMENT, LLC 0.15% of their portfolio WEST PALM BEACH, FL 299,997300.0k $3.2m $3.2m 0.15% Unchanged
20 Context Capital Management, LLC 0.06% of their portfolio LAJOLLA, CA 262,951263.0k $2.8m $2.8m 0.06% Unchanged
21 MOORE CAPITAL MANAGEMENT, LP 0.06% of their portfolio NEW YORK, NY 250,000250.0k $2.7m $2.7m 0.06% Unchanged
22 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 246,374246.4k $2.7m $2.7m 0.00% Added +71.3k +71,274
23 Shaolin Capital Management LLC 0.15% of their portfolio Miami, FL 241,138241.1k $2.6m $2.6m 0.15% Reduced -38.7k -38,711
24 Radcliffe Capital Management, L.P. 0.19% of their portfolio BALA CYNWYD, PA 227,454227.5k $2.5m $2.5m 0.19% Unchanged
25 RLH Capital LLC 1.09% of their portfolio Great Neck, NY 210,093210.1k $2.3m $2.3m 1.09% Reduced -94.2k -94,227
26 Wealthspring Capital LLC 0.50% of their portfolio WEST HARRISON, NY 207,565207.6k $2.2m $2.2m 0.50% Unchanged
27 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 200,000200.0k $2.2m $2.2m 0.00% Unchanged
28 Quarry LP 0.34% of their portfolio NEW YORK, NY 200,000200.0k $2.2m $2.2m 0.34% Added +58.4k +58,403
29 MANGROVE PARTNERS IM, LLC 0.11% of their portfolio Greenwich, CT 156,622156.6k $1.7m $1.7m 0.11% Unchanged
30 HIGHBRIDGE CAPITAL MANAGEMENT LLC 0.06% of their portfolio NEW YORK, NY 154,587154.6k $1.7m $1.7m 0.06% Added +102.6k +102,623
31 Meteora Capital, LLC 0.12% of their portfolio Boca Raton, FL 139,311139.3k $1.5m $1.5m 0.12% Added +86.1k +86,092
32 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 116,551116.6k $1.3m $1.3m 0.00% Unchanged
33 Massar Capital Management, LP 0.35% of their portfolio STAMFORD, CT 94,60094.6k $1.0m $1.0m 0.35% Unchanged
34 Periscope Capital Inc. 0.13% of their portfolio Toronto, A6 75,00075.0k $810.8k $810.8k 0.13% Reduced -50.0k -50,000
35 Lineage Point Capital LP 0.11% of their portfolio PALM BEACH, FL 50,04250.0k $541.0k $541.0k 0.11% Unchanged
36 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 50,00050.0k $541.0k $541.0k 0.00% Unchanged
37 DLD Asset Management, LP 0.04% of their portfolio NEW YORK, NY 50,00050.0k $540.5k $540.5k 0.04% Reduced -71.1k -71,073
38 StoneX Group Inc. 0.02% of their portfolio NEW YORK, NY 48,55448.6k $524.9k $524.9k 0.02% New
39 Clear Street Group Inc. 0.00% of their portfolio NEW YORK, NY 29,81529.8k $322.3k $322.3k 0.00% Reduced -100 -100
40 Alyeska Investment Group, L.P. 0.00% of their portfolio CHICAGO, IL 24,50024.5k $266.6k $266.6k 0.00% New
41 GLAZER CAPITAL, LLC 0.01% of their portfolio New York, NY 21,36921.4k $231.0k $231.0k 0.01% Unchanged
42 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 16,62016.6k $179.7k $179.7k 0.00% Added +1.9k +1,908
43 BOOTHBAY FUND MANAGEMENT, LLC 0.00% of their portfolio NEW YORK, NY 11,71911.7k $126.7k $126.7k 0.00% New
44 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 10,17010.2k $109.9k $109.9k 0.00% Reduced -794 -794
45 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 9,3149.3k $100.7k $100.7k 0.00% Reduced -8 -8
46 Arax Advisory Partners 0.00% of their portfolio NEW YORK, NY 4,2214.2k $45.6k $45.6k 0.00% New
47 UBS Group AG 0.00% of their portfolio ZURICH, V8 2,4372.4k $26.3k $26.3k 0.00% Added +955 +955
48 FNY Investment Advisers, LLC 0.00% of their portfolio NEW YORK, NY 3737 $0 $0 0.00% Unchanged