SILVERBOX CORP IV (SBXD)
Institutional ownership reported to the SEC as of Q2 2026, across 7 quarters.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| MIZUHO SECURITIES USA LLC | $39.0M | 3,637,389 | 0.37% | 4q | +102.4%+$19.7M |
| Linden Advisors LP | $21.6M | 2,000,000 | 0.11% | 7q | HELD |
| BERKLEY W R CORP | $20.9M | 1,930,127 | 0.99% | 7q | +27.4%+$4.5M |
| Polar Asset Management Partners Inc. | $16.3M | 1,508,005 | 0.27% | 7q | HELD |
| AQR Arbitrage LLC | $10.9M | 1,012,401 | 0.16% | 7q | -24.2%-$3.5M |
| WOLVERINE ASSET MANAGEMENT LLC | $10.7M | 993,816 | 0.09% | 6q | HELD |
| D. E. Shaw & Co., Inc. | $10.7M | 989,397 | 0.01% | 7q | HELD |
| MMCAP International Inc. SPC | $10.6M | 980,000 | 0.90% | 6q | HELD |
| Crossingbridge Advisors, LLC | $10.0M | 928,613 | 1.77% | 3q | -5.0%-$523.2K |
| PICTON MAHONEY ASSET MANAGEMENT | $8.9M | 824,899 | 0.07% | 7q | HELD |
| RiverPark Advisors, LLC | $7.3M | 678,613 | 3.35% | 3q | HELD |
| GOLDMAN SACHS GROUP INC | $6.6M | 606,074 | 0.00% | 7q | HELD |
| Magnetar Financial LLC | $5.6M | 520,823 | 0.05% | 5q | HELD |
| Calamos Advisors LLC | $5.4M | 500,000 | 0.02% | 6q | HELD |
| LMR Partners LLP | $5.4M | 500,000 | 0.02% | 7q | HELD |
| First Trust Capital Management L.P. | $4.8M | 445,168 | 0.28% | 5q | HELD |
| ARISTEIA CAPITAL, L.L.C. | $3.6M | 336,123 | 0.05% | 3q | HELD |
| Westchester Capital Management, LLC | $3.5M | 325,485 | 0.17% | 6q | HELD |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | $3.2M | 299,997 | 0.15% | 7q | HELD |
| Context Capital Management, LLC | $2.8M | 262,951 | 0.06% | 6q | HELD |
| MOORE CAPITAL MANAGEMENT, LP | $2.7M | 250,000 | 0.04% | 6q | HELD |
| TORONTO DOMINION BANK | $2.7M | 246,374 | 0.00% | 6q | +40.7%+$770.5K |
| Shaolin Capital Management LLC | $2.6M | 241,138 | 0.12% | 5q | -13.8%-$418.5K |
| Radcliffe Capital Management, L.P. | $2.5M | 227,454 | 0.19% | 5q | HELD |
| RLH Capital LLC | $2.3M | 210,093 | 1.09% | 2q | -31.0%-$1.0M |
| Wealthspring Capital LLC | $2.2M | 207,565 | 0.50% | 7q | HELD |
| MILLENNIUM MANAGEMENT LLC | $2.2M | 200,000 | 0.00% | 7q | HELD |
| Quarry LP | $2.2M | 200,000 | 0.18% | 3q | +41.2%+$631.3K |
| MANGROVE PARTNERS IM, LLC | $1.7M | 156,622 | 0.11% | 4q | HELD |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | $1.7M | 154,587 | 0.04% | 2q | +197.5%+$1.1M |
| Meteora Capital, LLC | $1.5M | 139,311 | 0.12% | 4q | +161.8%+$930.7K |
| HRT FINANCIAL LP | $1.3M | 116,551 | 0.00% | 5q | HELD |
| Massar Capital Management, LP | $1.0M | 94,600 | 0.10% | 5q | HELD |
| Periscope Capital Inc. | $810.8K | 75,000 | 0.07% | 7q | -40.0%-$540.5K |
| JPMORGAN CHASE & CO | $541.0K | 50,000 | 0.00% | 5q | HELD |
| Lineage Point Capital LP | $541.0K | 50,042 | 0.11% | 3q | HELD |
| DLD Asset Management, LP | $540.5K | 50,000 | 0.04% | 6q | -58.7%-$768.3K |
| StoneX Group Inc. | $524.9K | 48,554 | 0.02% | new | NEW |
| Clear Street Group Inc. | $322.3K | 29,815 | 0.00% | 4q | HELD |
| Alyeska Investment Group, L.P. | $266.6K | 24,500 | 0.00% | new | NEW |
| GLAZER CAPITAL, LLC | $231.0K | 21,369 | 0.01% | 7q | HELD |
| CITADEL ADVISORS LLC | $219.9K | 20,340 | 0.00% | 4q | +85.5%+$101.4K |
| JANE STREET GROUP, LLC | $179.7K | 16,620 | 0.00% | 2q | +13.0%+$20.6K |
| BOOTHBAY FUND MANAGEMENT, LLC | $126.7K | 11,719 | 0.00% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $100.7K | 9,314 | 0.00% | 2q | HELD |
| Arax Advisory Partners | $45.6K | 4,221 | 0.00% | new | NEW |
| UBS Group AG | $26.3K | 2,437 | 0.00% | 7q | +64.4%+$10.3K |
| SkyView Investment Advisors, LLC | $1.9K | 179,449? | 1.52% | new | |
| FNY Investment Advisers, LLC | $0 | 37 | 0.00% | new | NEW |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-10-09 | 13G | Calamos Market Neutral Income Fund, a series of Calamos Investment Trust | 7.8% |
| 2026-08-12 | 13G/A | AQR CAPITAL MANAGEMENT LLCwith 2 co-filers | 5.0% |
| 2026-08-06 | 13G/A | W. R. Berkley Corporationwith 1 co-filers | 9.4% |
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-09-25 | 2026-09-25 | Delisting notice | filing |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 48 | $239.0M | 22,138,144 | 5 | 9 | 6 | 0.0% |
| Q1 2026 | 45 | $216.4M | 20,233,279 | 5 | 10 | 6 | 0.0% |
| Q4 2025 | 45 | $209.3M | 19,793,495 | 6 | 9 | 8 | 0.0% |
| Q3 2025 | 50 | $202.3M | 19,317,922 | 7 | 9 | 14 | 0.0% |
| Q2 2025 | 49 | $213.0M | 19,454,713 | 17 | 10 | 13 | 0.0% |
| Q1 2025 | 35 | $194.4M | 19,098,220 | 12 | 5 | 3 | 0.0% |
| Q4 2024 | 25 | $148.5M | 14,708,773 | 25 | 0 | 0 | 0.0% |