Sixth Street Specialty Lending, Inc. (TSLX) has 20 known insider and institutional holders on record. The largest holder is MSSB TPG Specialty Lending Onshore Feeder Fund with 3,012,582 shares. Other notable holders include Waxman Alan and Tanemura Ronald.
Over the last 12 months, insiders have made 10 transactions in TSLX stock — 8 buys (valued at $6.57M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
TSLX Insider Ownership
Top Holder
MSSB TPG Specialty Lending Onshore Feeder Fund
3,012,582 shares
Buys (12 mo)
8
$6.57M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Mssb Tpg Specialty Lending Onshore Feeder Fund |
10 Percent Owner |
3,012,582 |
2014-08-13 |
|
| 2 |
Waxman Alan |
Vice President |
100,000 |
2026-03-09 |
|
| 3 |
Tanemura Ronald |
Director |
86,516 |
2018-03-27 |
|
| 4 |
Universities Superannuation Scheme Ltd As Trustee For Universities Superannuation Scheme |
10 Percent Owner |
52,313 |
2013-09-18 |
|
| 5 |
Pluss Steven |
Vice President |
51,500 |
2026-03-03 |
|
| 6 |
Fishman Michael |
Co-chief Executive Officer |
36,366 |
2014-10-17 |
|
| 7 |
Ross John |
Director |
35,000 |
2021-03-01 |
|
| 8 |
Stiepleman David |
Vice President |
25,735 |
2026-03-04 |
|
| 9 |
Stanley Robert J. |
Co-CEO |
24,907 |
2025-11-20 |
|
| 10 |
Easterly Joshua |
Chief Executive Officer |
18,792 |
2021-03-11 |
|
| 11 |
Slotkin Judy S |
Director |
18,726 |
2024-08-07 |
|
| 12 |
Doddy Hurley |
Director |
15,241 |
2023-03-15 |
|
| 13 |
Covington P Emery |
Director |
15,000 |
2026-03-10 |
|
| 14 |
Bruck Ross Anthony |
Vice President |
10,250 |
2026-02-20 |
|
| 15 |
Ollwerther Robert D |
Chief Operating Officer |
9,500 |
2015-11-20 |
|
| 16 |
Kirshenbaum Alan |
Chief Financial Officer |
8,361 |
2015-05-22 |
|
| 17 |
Graf Michael |
See Remarks |
7,205 |
2026-03-02 |
|
| 18 |
Simmonds Ian |
Chief Financial Officer |
4,996 |
2022-08-09 |
|
| 19 |
Higginbotham Richard A |
Director |
4,000 |
2022-03-09 |
|
| 20 |
Burke Kenneth Joseph |
Chief Compliance Officer |
3,363 |
2020-03-16 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-06 |
Covington P Emery |
Director |
Informative Buy |
7,500 |
$18.35 |
$137.63K |
| 2026-03-06 |
Waxman Alan |
Vice President |
Informative Buy |
200,000 |
$18.42 |
$3.68M |
| 2026-03-05 |
Waxman Alan |
Vice President |
Informative Buy |
100,000 |
$18.46 |
$1.85M |
| 2026-03-02 |
Stiepleman David |
Vice President |
Informative Buy |
20,200 |
$17.65 |
$356.53K |
| 2026-03-02 |
Peck Joshua |
Vice President |
Informative Buy |
2,840 |
$17.59 |
$49.96K |
| 2026-02-27 |
Pluss Steven |
Vice President |
Informative Buy |
15,000 |
$17.72 |
$265.8K |
| 2026-02-26 |
Graf Michael |
See Remarks |
Informative Buy |
1,000 |
$18.26 |
$18.26K |
| 2026-02-12 |
Bruck Ross Anthony |
Vice President |
Unknown |
- |
- |
- |
| 2025-11-18 |
Stanley Robert J. |
Co-CEO |
Informative Buy |
10,000 |
$20.85 |
$208.5K |
| 2025-06-30 |
Hershey John D. |
Director |
Unknown |
- |
- |
- |
