Silverbox Corp. IV-A- 29SBXWFPreferred / convertible
13F holders, Q3 2025 (September 30)27holders −1
1new positions
2sold out
$0.43avg. 13F price*
At the end of Q3 2025, 27 institutions reported holding Silverbox Corp. IV-A- 29 (SBXWF) in their 13F filings, down 1 from Q2 2025. 1 opened new positions and 2 sold out. The largest holders were Healthcare of Ontario Pension Plan Trust Fund ($293K), Polar Asset Management Partners Inc. ($290K) and Linden Advisors LP ($277K).
- Company
- Silverbox Corp. IV-A- 29
- CUSIP
- G81354121
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $94K |
| Exits | 2 | $288K |
All 13F filers, Q2 2025 → Q3 2025: 353,955 shares bought and 567,318 shares sold, net −213,363 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 27 holders
| Healthcare of Ontario Pension Plan Trust Fund | — | No change | 666,666 | $293K |
| Polar Asset Management Partners Inc. | — | No change | 660,000 | $290K |
| Linden Advisors LP | — | No change | 666,667 | $277K |
| AQR Arbitrage LLC | — | Reduce -28.8% | 529,987 | $196K |
| Sculptor Capital LP | — | Reduce -1.1% | 469,900 | $195K |
| MMCAP International Inc. SPC | — | No change | 326,666 | $144K |
| Governors Lane LP | — | No change | 321,912 | $142K |
| BNP Paribas Financial Markets | — | New | 214,539 | $94K |
| Picton Mahoney Asset Management | — | Reduce -30.2% | 203,326 | $89K |
| Shaolin Capital Management LLC | — | Add +0.1% | 199,555 | $88K |
| Magnetar Financial LLC | — | Reduce -3.3% | 187,050 | $82K |
| Calamos Advisors LLC | — | No change | 166,666 | $73K |
| LMR Partners LLP | — | No change | 166,666 | $73K |
| Walleye Capital LLC | — | Add +57.4% | 164,542 | $72K |
| CSS LLC | — | Add +46.5% | 132,521 | $58K |
| Context Capital Management, LLC | — | No change | 104,317 | $46K |
| Rivernorth Capital Management, LLC | — | No change | 99,999 | $44K |
| Moore Capital Management, LP | — | No change | 83,333 | $37K |
| Wealthspring Capital LLC | — | Reduce -0.8% | 78,362 | $34K |
| Gritstone Asset Management LLC | — | Reduce -0.9% | 73,411 | $32K |
| Periscope Capital Inc. | — | No change | 70,000 | $31K |
| Saba Capital Management, L.P. | — | No change | 67,710 | $28K |
| Bulldog Investors, LLP | — | Reduce -3.4% | 59,715 | $26K |
| Parallax Volatility Advisers, L.P. | — | Add +106.4% | 57,621 | $25K |
| Toronto Dominion Bank | — | No change | 50,000 | $22K |
| Clear Street Group Inc. | — | — | 48,400 | $21K |
| StoneX Group Inc. | — | Add +47.0% | 23,077 | $10K |
"% of holder's portfolio" is SBXWF's weight in each manager's 13F, not the share of Silverbox Corp. IV-A- 29 the manager owns.