BXSL's three largest insider shareholders as of September 29, 2026 are Brad Marshall (Ceo, 203.18K shares), Robert J Bass (Other, 25.11K shares), Katherine Rubenstein (Chief Operating Officer, 5.77K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Brad Marshall | Ceo | 203,184 | 0 | 203,184 | 84.0% | 22 Nov, 2022 |
| 2 | Robert J Bass | Other | 25,107 | 0 | 25,107 | 10.4% | 13 May, 2026 |
| 3 | Katherine Rubenstein | Chief Operating Officer | 5,771 | 0 | 5,771 | 2.4% | 11 Mar, 2026 |
| 4 | Carlos Whitaker | President | 3,895 | 0 | 3,895 | 1.6% | 30 May, 2023 |
| 5 | James Frederic Clark | Other | 2,750 | 0 | 2,750 | 1.1% | 12 Mar, 2026 |
| 6 | Lucie Enns | Officer | 1,045 | 0 | 1,045 | 0.4% | 16 Mar, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 12 May, 2026 | Robert J Bass | Other | Acquired P | 2,095 | $23.80 | $49.85K | 25,107 | Direct |
| 13 Mar, 2026 | Lucie Enns | Officer | Acquired P | 1,045 | $23.48 | $24.54K | 1,045 | Direct |
| 11 Mar, 2026 | James Frederic Clark | Other | Acquired P | 750 | $23.78 | $17.84K | 2,750 | Direct |
| 10 Mar, 2026 | Katherine Rubenstein | Chief Operating Officer | Acquired P | 1,035 | $24.08 | $24.92K | 5,771 | Direct |
| 11 Nov, 2025 | James Frederic Clark | Other | Acquired P | 2,000 | $26.68 | $53.36K | 2,000 | Direct |
| 06 Oct, 2025 | Robert J Bass | Other | Acquired P | 3,760 | $26.63 | $100.13K | 21,167 | Direct |
| 13 May, 2025 | Robert J Bass | Other | Acquired P | 1,626 | $30.78 | $50.05K | 17,403 | Direct |
| 26 May, 2023 | Carlos Whitaker | President | Acquired P | 3,895 | $25.68 | $100.02K | 3,895 | Direct |
| 21 Nov, 2022 | Katherine Rubenstein | Chief Operating Officer | Acquired P | 3,359 | $23.83 | $80.04K | 3,359 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 27 | $24.06 | $650 | 180,492 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 47 | $24.07 | $1.13K | 186,061 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 300 | $23.99 | $7.20K | 161,584 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 20 | $24.09 | $482 | 189,515 | Direct |
| 21 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 100 | $23.89 | $2.39K | 203,284 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 44 | $24.13 | $1.06K | 193,574 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 25 | $24.06 | $601 | 180,517 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 21 | $24.09 | $506 | 189,536 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 20 | $24.07 | $481 | 186,081 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 24 | $24.13 | $579 | 193,598 | Direct |
| 18 Nov, 2022 | Brad Marshall | Ceo | Acquired P | 500 | $24.00 | $12.00K | 162,084 | Direct |