Sixth Street Specialty Lending, Inc.
TSLX- Exchange
- NYSE
- SEC CIK
- 0001508655
No open-market purchases or sales by Sixth Street Specialty Lending, Inc. insiders were filed in the last 90 days; 242 institutions reported holding it in 13F filings for Q2 2026, worth $896.5M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Sixth Street Specialty Lending, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 260
- +8 vs. Q4 2025
- Shares held
- 52.1M
- +1.79M (+3.6%) vs. Q4 2025
- Total value
- $955.4M
- −$138.6M (−12.7%) vs. Q4 2025
- New holders
- 43
- 91 more added
- Sold out
- 35
- 75 more reduced
6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TSLX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 242 | $896.5M |
| Q1 2026 | 260 | $955.4M |
| Q4 2025 | 258 | $1.09B |
| Q3 2025 | 247 | $1.11B |
| Q2 2025 | 245 | $1.16B |
| Q1 2025 | 236 | $1.07B |
| Q4 2024 | 223 | $963.5M |
| Q3 2024 | 202 | $904.9M |
| Q2 2024 | 224 | $962.2M |
| Q1 2024 | 220 | $936.0M |
| Q4 2023 | 223 | $889.5M |
| Q3 2023 | 205 | $806.6M |
| Q2 2023 | 202 | $705.0M |
| Q1 2023 | 195 | $621.2M |
| Q4 2022 | 196 | $643.2M |
| Q3 2022 | 175 | $601.1M |
| Q2 2022 | 180 | $655.5M |
| Q1 2022 | 171 | $825.9M |
| Q4 2021 | 168 | $855.4M |
| Q3 2021 | 159 | $813.5M |
| Q2 2021 | 158 | $808.3M |
| Q1 2021 | 159 | $758.6M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Sixth Street Specialty Lending, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| MQS Management LLC | 16,059 | $295.2K | 0.20% | +16,059 | New |
| Mallini Complete Financial Planning LLC | 16,116 | $296.2K | 0.23% | +652+4.2% | Added |
| Mutual Advisors, LLC | 16,800 | $308.8K | 0.01% | +16,800 | New |
| Sanctuary Advisors, LLC | 17,184 | $315.8K | 0.00% | −1,488−8.0% | Reduced |
| COFG Advisors, LLC | 17,708 | $325.5K | 0.08% | −12,053−40.5% | Reduced |
| Clearstead Advisors, LLC | 18,000 | $330.8K | 0.00% | 00.0% | Unchanged |
| Monument Capital Management | 18,114 | $332.9K | 0.08% | −468−2.5% | Reduced |
| Maia Wealth LLC | 18,155 | $333.7K | 0.06% | +7,944+77.8% | Added |
| Sargent Investment Group, LLC | 18,400 | $338.2K | 0.04% | −10,000−35.2% | Reduced |
| Kestra Advisory Services, LLC | 18,710 | $343.9K | 0.00% | −12,160−39.4% | Reduced |
| Integrated Wealth Concepts LLC | 18,739 | $344.4K | 0.00% | +18,739 | New |
| Catalytic Wealth RIA, LLC | 19,116 | $351.4K | 0.01% | −2,754−12.6% | Reduced |
| ProShare Advisors LLC | 19,118 | $351.4K | 0.00% | −193−1.0% | Reduced |
| Kovack Advisors, Inc. | 19,419 | $356.9K | 0.02% | −1,854−8.7% | Reduced |
| Silver Oak Securities, Inc | 20,521 | $377.2K | 0.03% | −1,346−6.2% | Reduced |
| Cornerstone Investment Partners, LLC | 20,884 | $383.8K | 0.02% | +20,884 | New |
| Generali Investments CEE, investicni spolecnost, a.s. | 21,235 | $390.3K | 0.02% | 00.0% | Unchanged |
| Citadel Advisors LLC | 21,793 | $400.6K | 0.00% | +21,793 | New |
| Capstone Investment Advisors, LLC | 22,068 | $405.6K | 0.00% | +22,068 | New |
| Chicago Partners Investment Group LLC | 21,852 | $413.7K | 0.01% | −1,160−5.0% | Reduced |
| London & Capital Asset Management Ltd | 23,130 | $425.4K | 0.00% | +3,730+19.2% | Added |
| Klein Pavlis & Peasley Financial, Inc. | 24,325 | $447.1K | 0.25% | +5,596+29.9% | Added |
| Jane Street Group, LLC | 24,658 | $453.2K | 0.00% | +10,862+78.7% | Added |
| Merrion Investment Management Co, LLC | 25,000 | $459.5K | 0.25% | 00.0% | Unchanged |
| US Bancorp | 25,353 | $466.0K | 0.00% | +240+1.0% | Added |
| Sage Investment Counsel LLC | 25,577 | $470.1K | 0.52% | +800+3.2% | Added |
| Main Street Financial Solutions, LLC | 25,761 | $473.5K | 0.03% | +25,761 | New |
| Squarepoint Ops LLC | 26,418 | $485.6K | 0.00% | +11,371+75.6% | Added |
| Triad Investment Management | 26,602 | $488.9K | 0.58% | 00.0% | Unchanged |
| Virtus Investment Advisers, Inc. | 26,629 | $489.4K | 0.14% | +1,601+6.4% | Added |
| Mariner, LLC | 26,981 | $495.9K | 0.00% | −5,161−16.1% | Reduced |
| Whipplewood Advisors, LLC | 27,244 | $500.7K | 0.26% | +17,428+177.5% | Added |
| Barnett & Company, Inc. | 27,850 | $511.9K | 0.40% | −1,400−4.8% | Reduced |
| DRW Securities, LLC | 29,034 | $533.6K | 0.03% | +29,034 | New |
| HighTower Advisors, LLC | 29,229 | $537.2K | 0.00% | −18,193−38.4% | Reduced |
| Romano Brothers and Company | 29,700 | $545.9K | 0.06% | 00.0% | Unchanged |
| Guggenheim Capital LLC | 31,216 | $573.8K | 0.00% | +2,623+9.2% | Added |
| Buckingham Strategic Partners | 31,488 | $577.9K | 0.01% | +6,621+26.6% | Added |
| Invesco Ltd. | 31,845 | $585.3K | 0.00% | −1,618−4.8% | Reduced |
| Family Wealth Partners, LLC | 32,736 | $600.8K | 0.21% | +7,869+31.6% | Added |
| Ethos Financial Group, LLC | 27,774 | $603.3K | 0.04% | 00.0% | Unchanged |
| Captrust Financial Advisors | 32,848 | $603.8K | 0.00% | −6,099−15.7% | Reduced |
| Nations Financial Group Inc, | 33,167 | $609.6K | 0.03% | −2,580−7.2% | Reduced |
| Dakota Wealth Management | 34,300 | $630.4K | 0.01% | −4,560−11.7% | Reduced |
| HB Wealth Management, LLC | 34,516 | $634.4K | 0.00% | −41,235−54.4% | Reduced |
| Platform Technology Partners | 36,444 | $669.8K | 0.13% | +2,000+5.8% | Added |
| Northern Trust Corp | 37,059 | $681.1K | 0.00% | −38,026−50.6% | Reduced |
| Texas Yale Capital Corp. | 37,376 | $687.0K | 0.02% | +500+1.4% | Added |
| Ehrenkranz Partners L.P. | 37,474 | $688.8K | 0.54% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 37,598 | $691.1K | 0.01% | +37,598 | New |
| Essex Financial Services, Inc. | 37,992 | $698.3K | 0.04% | −1,530−3.9% | Reduced |
| Diversify Advisory Services, LLC | 38,336 | $726.1K | 0.11% | −118−0.3% | Reduced |
| Diversify Wealth Management, LLC | 38,516 | $729.5K | 0.01% | +38,516 | New |
| Creative Planning | 39,692 | $729.5K | 0.00% | +355+0.9% | Added |
| Evoke Wealth, LLC | 39,858 | $732.6K | 0.01% | −10.0% | Reduced |
| Park Circle Co | 40,145 | $737.9K | 0.70% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 41,995 | $771.9K | 0.01% | +41,995 | New |
| Pallas Capital Advisors LLC | 42,952 | $789.5K | 0.03% | −303−0.7% | Reduced |
| Cornerstone Wealth Management, LLC | 43,318 | $796.2K | 0.04% | −3,775−8.0% | Reduced |
| Advisor Group Holdings, Inc. | 44,602 | $820.1K | 0.00% | −9,772−18.0% | Reduced |
| Canton Hathaway, LLC | 44,765 | $822.8K | 0.17% | −1,770−3.8% | Reduced |
| CI Private Wealth, LLC | 45,174 | $830.3K | 0.00% | −33,063−42.3% | Reduced |
| Millennium Management LLC | 45,828 | $842.3K | 0.00% | +11,592+33.9% | Added |
| Schonfeld Strategic Advisors LLC | 47,508 | $873.2K | 0.01% | +47,508 | New |
| Foundations Investment Advisors, LLC | 47,758 | $877.8K | 0.01% | +7,632+19.0% | Added |
| Brown Advisory Inc | 48,430 | $890.1K | 0.00% | −283−0.6% | Reduced |
| Savvy Advisors, Inc. | 49,345 | $907.0K | 0.02% | +5,956+13.7% | Added |
| Dearborn Partners LLC | 50,508 | $928.3K | 0.05% | −5,921−10.5% | Reduced |
| Lido Advisors, LLC | 52,154 | $958.6K | 0.00% | +9,982+23.7% | Added |
| Rockefeller Capital Management L.P. | 52,820 | $970.8K | 0.00% | −95,549−64.4% | Reduced |
| Toroso Investments, LLC | 53,219 | $978.2K | 0.00% | +53,219 | New |
| Tred Avon Family Wealth, LLC | 55,751 | $1.02M | 0.34% | +11,725+26.6% | Added |
| CWM, LLC | 57,110 | $1.05M | 0.00% | −35,215−38.1% | Reduced |
| CAPROCK Group, Inc. | 60,584 | $1.11M | 0.03% | +190.0% | Added |
| Ieq Capital, LLC | 60,723 | $1.12M | 0.01% | +60,723 | New |
| Quantinno Capital Management LP | 62,099 | $1.14M | 0.00% | −45−0.1% | Reduced |
| Beacon Pointe Advisors, LLC | 62,519 | $1.15M | 0.01% | 00.0% | Unchanged |
| Independent Financial Group, LLC | 65,541 | $1.20M | 0.03% | +6,230+10.5% | Added |
| AE Wealth Management LLC | 67,481 | $1.24M | 0.01% | +37,460+124.8% | Added |
| Legacy Capital Wealth Partners, LLC | 74,798 | $1.37M | 0.28% | +6,716+9.9% | Added |
| Wiley Bros.-Aintree Capital, LLC | 80,979 | $1.49M | 0.01% | −5,986−6.9% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 84,040 | $1.54M | 0.01% | +18,547+28.3% | Added |
| Plan Group Financial, LLC | 90,369 | $1.66M | 0.39% | +17,112+23.4% | Added |
| BNP Paribas Arbitrage, SA | 96,541 | $1.77M | 0.00% | +4,582+5.0% | Added |
| Lifetime Wealth Management P.C. | 97,416 | $1.79M | 1.02% | +42,529+77.5% | Added |
| Ignite Planners, LLC | 111,879 | $2.06M | 0.32% | +9,562+9.3% | Added |
| State Street Corp | 114,621 | $2.11M | 0.00% | +358+0.3% | Added |
| XTX Topco Ltd | 115,291 | $2.12M | 0.04% | +93,402+426.7% | Added |
| Delphi Financial Group, Inc. | 116,141 | $2.13M | 0.96% | +84,100+262.5% | Added |
| IHT Wealth Management, LLC | 118,072 | $2.17M | 0.05% | +7,998+7.3% | Added |
| Royal Bank of Canada | 120,921 | $2.22M | 0.00% | −34,966−22.4% | Reduced |
| Ameriprise Financial Inc | 122,366 | $2.25M | 0.00% | −99,072−44.7% | Reduced |
| Commonwealth Equity Services, LLC | 128,732 | $2.37M | 0.00% | −28,055−17.9% | Reduced |
| Wealthstar Advisors, LLC | 129,524 | $2.38M | 1.42% | +150.0% | Added |
| Argent Trust Co | 129,821 | $2.39M | 0.08% | −6,005−4.4% | Reduced |
| Russell Investments Group, Ltd. | 134,913 | $2.48M | 0.00% | +134,731+74,028.0% | Added |
| First National Trust Co | 137,667 | $2.53M | 0.09% | −109,769−44.4% | Reduced |
| Waterloo Capital, L.P. | 140,877 | $2.59M | 0.18% | +481+0.3% | Added |
| Riverbridge Partners LLC | 143,704 | $2.64M | 0.06% | +53,766+59.8% | Added |
| Denali Advisors LLC | 144,882 | $2.66M | 0.30% | +4,738+3.4% | Added |