Sixth Street Specialty Lending, Inc. (TSLX) Ownership
TSLX ownership summary
as of October 18, 2026- Institutions
- 57.1% of shares outstanding
- Insiders
- 0.46% of shares outstanding
- Shares outstanding
- 95.3M
- Float
- 0 shares available to trade
- Short interest
- 4.82% 4.4M shares short
- Days to cover
- 10.56 short interest down 14.8% vs prior month
- Institutions 57.08%
- Insiders 0.46%
- Other investors 42.46%
TSLX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | STRS OHIO | 6.32% | 6.0M | $102.7M | +1.7M (+38.7%) | June 30, 2026 |
| 2 | Sixth Street Partners Management Company, L.P. | 2.85% | 2.7M | $46.2M | — | June 30, 2026 |
| 3 | Sound Income Strategies | 2.84% | 2.7M | $46.1M | +135,238 (+5.3%) | June 30, 2026 |
| 4 | Progeny 3, Inc. | 2.60% | 2.5M | $42.2M | — | June 30, 2026 |
| 5 | UBS Group AG | 2.49% | 2.4M | $40.4M | +515,008 (+27.7%) | June 30, 2026 |
| 6 | Van Eck Associates Corporation | 2.48% | 2.4M | $40.3M | +519,456 (+28.1%) | June 30, 2026 |
| 7 | Omers Administration Corp | 2.11% | 2.0M | $34.3M | +50,514 (+2.6%) | June 30, 2026 |
| 8 | Ares Management LLC | 1.47% | 1.4M | $23.9M | +50,000 (+3.7%) | June 30, 2026 |
| 9 | Allen Investment Management LLC | 1.44% | 1.4M | $23.3M | −27,022 (−1.9%) | June 30, 2026 |
| 10 | Wells Fargo & Co | 1.38% | 1.3M | $22.4M | −22,532 (−1.7%) | June 30, 2026 |
| 11 | HPM Partners LLC | 1.27% | 1.2M | $20.6M | +71,720 (+6.3%) | June 30, 2026 |
| 12 | Callodine Capital Management, LP | 1.23% | 1.2M | $20.0M | +46,560 (+4.1%) | June 30, 2026 |
| 13 | Muzinich & Co Inc | 1.13% | 1.1M | $18.3M | +28,230 (+2.7%) | June 30, 2026 |
| 14 | Morgan Stanley - Brokerage Accounts | 1.12% | 1.1M | $18.2M | −258,043 (−19.4%) | June 30, 2026 |
| 15 | RiverNorth Capital Management, LLC | 1.02% | 970K | $16.5M | +678,646 (+233.2%) | June 30, 2026 |
| 16 | Advisors Capital Management, LLC | 0.91% | 864K | $14.7M | +78,622 (+10.0%) | June 30, 2026 |
| 17 | TECTONIC ADVISORS LLC | 0.89% | 845K | $14.4M | +117,104 (+16.1%) | June 30, 2026 |
| 18 | Sumitomo Mitsui Trust Group Inc | 0.83% | 792K | $13.5M | +22,279 (+2.9%) | June 30, 2026 |
| 19 | LSV Asset Management | 0.83% | 789K | $13.4M | −12 (−0.0%) | June 30, 2026 |
| 20 | Legal & General Group PLC | 0.83% | 788K | $13.4M | +55,146 (+7.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 4.1M shares and 4 cut 308K.
TSLX top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | VanEck BDC Income ETF | 1.80% | 1.7M | $29.2M | — | September 30, 2026 |
| 2 | Putnam BDC Income ETF | 0.73% | 700K | $11.9M | −3,232 (−0.5%) | September 30, 2026 |
| 3 | iShares Listed Private Eq ETF USD Dist | 0.36% | 339K | $5.8M | — | September 30, 2026 |
| 4 | LGT Crown Listed Private Eq A EUR Acc | 0.24% | 230K | $3.9M | −350,000 (−60.3%) | March 31, 2026 |
| 5 | First Trust Specialty Finance | 0.17% | 166K | $2.8M | — | September 30, 2026 |
| 6 | FID DC L&G Retirement Income MA Fund | 0.17% | 165K | $2.8M | +131,933 (+396.8%) | September 30, 2026 |
| 7 | Lazard Listed Private Mkts EA Acc GBP | 0.13% | 128K | $2.2M | +31,197 (+32.2%) | June 30, 2026 |
| 8 | FID DC L&G Diversified Fund | 0.13% | 126K | $2.1M | −20,675 (−14.1%) | August 31, 2026 |
| 9 | WisdomTree Private Credit & Alt Inc | 0.11% | 101K | $1.7M | — | September 30, 2026 |
| 10 | RiverNorth Opportunities | 0.10% | 100K | $1.7M | +50,000 (+100.0%) | June 30, 2026 |
| 11 | Sound Enhanced Fixed Income ETF | 0.05% | 52K | $886,429 | — | September 30, 2026 |
| 12 | LSV Small Cap Value Institutional | 0.05% | 50K | $854,906 | — | September 30, 2026 |
| 13 | WS Keyridge Diversified Monthly Inc GAcc | 0.05% | 44K | $741,725 | — | December 31, 2025 |
| 14 | Mediobanca SICAV PE Strat C | 0.04% | 40K | $681,200 | — | August 31, 2026 |
| 15 | Mercer Opportunistic Fixed Income Y3 | 0.04% | 36K | $619,602 | — | September 30, 2026 |
| 16 | Invesco Global Listed Private Equity ETF | 0.03% | 32K | $546,356 | — | September 30, 2026 |
| 17 | RiverNorth Active Income ETF | 0.03% | 26K | $434,912 | — | September 30, 2026 |
| 18 | Virtus Private Credit ETF | 0.02% | 20K | $341,469 | — | September 30, 2026 |
| 19 | T. Rowe Price M-A Glb Inc I USD | 0.02% | 18K | $299,064 | +4,448 (+33.9%) | August 31, 2026 |
| 20 | Alki Consolidated Income ETF | 0.02% | 18K | $298,110 | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
TSLX insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-10 | Alan Waxman | Buy | $18.47 | 45,000 | $831,150 |
| 2026-03-09 | Alan Waxman | Buy | $18.18 | 200,000 | $3.6M |
| 2026-03-06 | Alan Waxman | Buy | $18.42 | 200,000 | $3.7M |
| 2026-03-05 | Alan Waxman | Buy | $18.46 | 100,000 | $1.8M |
| 2025-11-18 | Robert J Stanley | Buy | $20.85 | 10,000 | $208,500 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
TSLX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns TSLX
Institutional investors own 57.1% of Sixth Street Specialty Lending's shares and insiders 0.46%. The largest holder is STRS OHIO with 6.32% of the shares (6.0M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 4 reduced their stake in the latest filings. Short interest is 4.82% of the float, or 10.56 days of average trading volume. The share count rose 75.5% since 2014.
Related: TSLX analyst forecast, TSLX key metrics, TSLX dividend history. See the TSLX stock overview for the latest quote and news.
TSLX ownership FAQ
Who owns the most Sixth Street Specialty Lending stock?
The largest shareholders of Sixth Street Specialty Lending are STRS OHIO (6.32%), Sixth Street Partners Management Company, L.P. (2.85%), Sound Income Strategies (2.84%), Progeny 3, Inc. (2.60%), UBS Group AG (2.49%).
What percentage of Sixth Street Specialty Lending is owned by institutions?
Institutions hold 57.1% of Sixth Street Specialty Lending's shares outstanding; insiders hold 0.46%.
Which funds own Sixth Street Specialty Lending?
The largest fund holders of Sixth Street Specialty Lending are VanEck BDC Income ETF (1.80%), Putnam BDC Income ETF (0.73%), iShares Listed Private Eq ETF USD Dist (0.36%), LGT Crown Listed Private Eq A EUR Acc (0.24%), First Trust Specialty Finance (0.17%).
What is Sixth Street Specialty Lending's short interest?
4.4M shares of Sixth Street Specialty Lending were sold short, 4.82% of the float; at the average daily volume it would take 10.56 days to cover.
Are insiders buying or selling Sixth Street Specialty Lending?
Of the latest 5 reported insider transactions in Sixth Street Specialty Lending (since November 18, 2025), 5 were purchases and 0 were sales.
How many shares of Sixth Street Specialty Lending are outstanding?
Sixth Street Specialty Lending has 95.3M shares outstanding, of which an unreported number are in the public float.