As of September 29, 2026, Sixth Street Specialty Lending's top three insider holders are Alan Waxman (Vice President, 545.00K shares), Steven Pluss (Vice President, 51.50K shares), David Stiepleman (Vice President, 25.73K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Alan Waxman | Vice President | 0 | 545,000 | 545,000 | 74.1% | 11 Mar, 2026 |
| 2 | Steven Pluss | Vice President | 51,500 | 0 | 51,500 | 7.0% | 03 Mar, 2026 |
| 3 | David Stiepleman | Vice President | 25,735 | 0 | 25,735 | 3.5% | 04 Mar, 2026 |
| 4 | Robert J. Stanley | Ceo | 0 | 23,907 | 23,907 | 3.2% | 29 May, 2026 |
| 5 | Judy S Slotkin | Director | 18,726 | 0 | 18,726 | 2.5% | 07 Aug, 2024 |
| 6 | Ross Anthony Bruck | Vice President | 18,250 | 0 | 18,250 | 2.5% | 13 May, 2026 |
| 7 | Hurley Doddy | Director | 15,241 | 0 | 15,241 | 2.1% | 15 Mar, 2023 |
| 8 | P Emery Covington | Director | 15,000 | 0 | 15,000 | 2.0% | 10 Mar, 2026 |
| 9 | Michael Graf | Officer | 7,205 | 0 | 7,205 | 1.0% | 02 Mar, 2026 |
| 10 | Ian Simmonds | Chief Financial Officer | 4,996 | 0 | 4,996 | 0.7% | 09 Aug, 2022 |
| 11 | Richard A Higginbotham | Director | 0 | 4,000 | 4,000 | 0.5% | 09 Mar, 2022 |
| 12 | Joshua Peck | Vice President | 3,140 | 0 | 3,140 | 0.4% | 03 Mar, 2026 |
| 13 | Jennifer Gordon | Vice President | 2,500 | 0 | 2,500 | 0.3% | 26 May, 2022 |
| 14 | Anton Brett | Chief Compliance Officer | 500 | 0 | 500 | 0.1% | 22 Aug, 2022 |
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 |
|---|---|---|---|---|---|---|---|---|
| 28 May, 2026 | Robert J. Stanley | Ceo | Acquired J | 20,000 | — | — | 23,907 | Indirect |
| 11 May, 2026 | Ross Anthony Bruck | Vice President | Acquired P | 8,000 | $17.76 | $142.08K | 18,250 | Direct |
| 09 Mar, 2026 | Alan Waxman | Vice President | Acquired P | 200,000 | $18.18 | $3.64Mn | 500,000 | Indirect |
| 10 Mar, 2026 | Alan Waxman | Vice President | Acquired P | 45,000 | $18.47 | $831.15K | 545,000 | Indirect |
| 06 Mar, 2026 | P Emery Covington | Director | Acquired P | 7,500 | $18.35 | $137.63K | 15,000 | Direct |
| 05 Mar, 2026 | Alan Waxman | Vice President | Acquired P | 100,000 | $18.46 | $1.85Mn | 100,000 | Indirect |
| 06 Mar, 2026 | Alan Waxman | Vice President | Acquired P | 200,000 | $18.42 | $3.68Mn | 300,000 | Indirect |
| 02 Mar, 2026 | David Stiepleman | Vice President | Acquired P | 20,200 | $17.65 | $356.53K | 25,735 | Direct |
| 02 Mar, 2026 | Joshua Peck | Vice President | Acquired P | 2,840 | $17.59 | $49.96K | 3,140 | Direct |
| 27 Feb, 2026 | Steven Pluss | Vice President | Acquired P | 15,000 | $17.72 | $265.80K | 51,500 | Direct |
| 26 Feb, 2026 | Michael Graf | Officer | Acquired P | 1,000 | $18.26 | $18.26K | 7,205 | Direct |
| 18 Nov, 2025 | Robert J. Stanley | Co Ceo | Acquired P | 10,000 | $20.85 | $208.50K | 24,907 | Direct |
| 20 Nov, 2024 | Michael Graf | Officer | Acquired P | 1,000 | $20.53 | $20.53K | 5,605 | Direct |
| 07 Aug, 2024 | Michael Graf | Officer | Acquired P | 500 | $20.45 | $10.23K | 4,505 | Direct |
| 05 Aug, 2024 | Judy S Slotkin | Director | Acquired P | 7,015 | $19.90 | $139.60K | 18,726 | Direct |
| 21 May, 2024 | P Emery Covington | Director | Acquired P | 7,500 | $21.50 | $161.28K | 7,500 | Direct |
| 13 Mar, 2023 | Hurley Doddy | Director | Acquired P | 2,900 | $17.51 | $50.78K | 15,241 | Direct |
| 09 Mar, 2023 | Michael Graf | Officer | Acquired P | 2,000 | $18.55 | $37.10K | 2,000 | Direct |
| 10 Mar, 2023 | Michael Graf | Officer | Acquired P | 1,500 | $17.55 | $26.33K | 3,500 | Direct |
| 18 Aug, 2022 | Anton Brett | Chief Compliance Officer | Acquired P | 500 | $19.25 | $9.62K | 500 | Direct |