Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in SBXD held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | LINDEN ADVISORS LP | 2.0M | $21.4M | 0.0% | 9.778% | 0.12% |
| 2 | MIZUHO SECURITIES USA LLC | 1.8M | $19.2M | +9.2% | 8.785% | 0.45% |
| 3 | BERKLEY W R CORP | 1.5M | $16.2M | +25.0% | 7.404% | 0.87% |
| 4 | Polar Asset Management Partners Inc. | 1.5M | $16.1M | +9.3% | 7.372% | 0.36% |
| 5 | CNH PARTNERS LLC | 1.3M | $14.3M | -0.9% | 6.528% | 0.23% |
| 6 | WOLVERINE ASSET MANAGEMENT LLC | 994K | $10.6M | +2.2% | 4.859% | 0.18% |
| 7 | D. E. Shaw & Co., Inc. | 989K | $10.6M | 0.0% | 4.837% | 0.01% |
| 8 | MMCAP International Inc. SPC | 980K | $10.5M | 0.0% | 4.791% | 0.91% |
| 9 | Crossingbridge Advisors, LLC | 977K | $10.5M | +53.2% | 4.776% | 1.89% |
| 10 | PICTON MAHONEY ASSET MANAGEMENT | 825K | $8.8M | 0.0% | 4.033% | 0.09% |
| 11 | RiverPark Advisors, LLC | 679K | $7.3M | +15.5% | 3.318% | 2.63% |
| 12 | GOLDMAN SACHS GROUP INC | 606K | $6.5M | -0.0% | 2.963% | 0.00% |
| 13 | Magnetar Financial LLC | 521K | $5.6M | 0.0% | 2.546% | 0.06% |
| 14 | LMR Partners LLP | 500K | $5.3M | 0.0% | 2.444% | 0.04% |
| 15 | Calamos Advisors LLC | 500K | $5.3M | 0.0% | 2.444% | 0.02% |
| 16 | Vivaldi Asset Management, LLC | 445K | $4.8M | 0.0% | 2.176% | 0.25% |
| 17 | ARISTEIA CAPITAL LLC | 336K | $3.6M | 0.0% | 1.643% | 0.08% |
| 18 | Westchester Capital Management, LLC | 325K | $3.5M | 0.0% | 1.591% | 0.17% |
| 19 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 300K | $3.2M | 0.0% | 1.467% | 0.16% |
| 20 | Shaolin Capital Management LLC | 280K | $3.0M | +24.4% | 1.368% | 0.12% |
| 21 | Context Capital Management, LLC | 263K | $2.8M | 0.0% | 1.286% | 0.07% |
| 22 | MOORE CAPITAL MANAGEMENT, LP | 250K | $2.7M | 0.0% | 1.222% | 0.06% |
| 23 | Radcliffe Capital Management, L.P. | 227K | $2.4M | 0.0% | 1.112% | 0.18% |
| 24 | Wealthspring Capital LLC | 208K | $2.2M | -0.6% | 1.015% | 0.53% |
| 25 | MILLENNIUM MANAGEMENT LLC | 200K | $2.1M | 0.0% | 0.978% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in SBXD — a direct measure of their conviction.
Filings activity in SBXD during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new SBXD position in Q1 2026
Institutions that fully closed their SBXD position in Q1 2026
6 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 45 | 2.2% | 95.94% | +1.88 pp | $212M | +2.0% |
| Q4 2025 | 46 | 2.1% | 94.06% | +7.53 pp | $208M | +8.7% |
| Q3 2025 | 47 | 6.0% | 86.53% | 4.14 pp | $191M | 4.6% |
| Q2 2025 | 50 | +43% | 90.67% | +7.85 pp | $200M | +9.5% |
| Q1 2025 | 35 | +40% | 82.82% | +21.21 pp | $183M | +34% |
| Q4 2024 | 25 | — | 61.61% | — | $136M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying SBXD stock.
Based on Q1 2026 13F filings, institutional ownership of SilverBox Corp IV stands at 95.9%, held across 45 reporting institutions.
LINDEN ADVISORS LP is the largest reported institutional holder of SBXD, with approximately 2,000,000 shares worth $0.02B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of SBXD, including MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for SBXD is 54 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
5 institutions opened new positions in SBXD during Q1 2026, while 6 fully exited. 35 added to existing positions and 4 trimmed.
SBXD institutional ownership rose by 1.88 percentage points quarter-over-quarter, with a net change of -1 holders.
The top 10 institutions account for 65.3% of all reported 13F value in SBXD, and the top 25 account for 93.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
SilverBox Corp IV (SBXD) Institutional Ownership