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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.

Q3 2025 vs. Q2 2025

How the institutions holding Sixth Street Specialty Lending, Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025All holders in Q2 2025

13F holders of TSLX: Q2 2025 compared with Q3 2025
MeasureQ2 2025Of which not filed for Q3 2025Q3 2025Change
Holders2455247+7
Shares48.9M190.4K48.7M+23.1K (0.0%)
Value$1.16B$4.53M$1.11B−$46.5M (−4.0%)

5 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (35)

Institutions that held Sixth Street Specialty Lending, Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to TSLX in Q3 2025
InstitutionSharesValue% of portfolio
Tectonic Advisors LLC558,938$12.8M0.70%
Atom Investors LP187,604$4.29M0.33%
National Philanthropic Trust100,000$2.29M0.03%
FJ Capital Management LLC91,827$2.10M0.23%
Barclays PLC88,917$2.03M0.00%
CAPROCK Group, Inc.60,323$1.48M0.04%
Tred Avon Family Wealth, LLC44,991$1.03M0.35%
Redhawk Wealth Advisors, Inc.39,519$903.4K0.10%
Ehrenkranz Partners L.P.37,474$856.7K0.75%
Aquatic Capital Management LLC32,824$750.4K0.01%
Quadrature Capital Ltd23,806$544.2K0.01%
Investor's Fiduciary Advisor Network, LLC22,790$520.0K0.18%
Price T Rowe Associates Inc20,937$479.0K0.00%
Wiley Bros.-Aintree Capital, LLC19,605$448.2K0.00%
Klein Pavlis & Peasley Financial, Inc.19,145$437.7K0.27%
Capstone Investment Advisors, LLC19,056$435.6K0.00%
Monument Capital Management18,582$424.8K0.11%
Catalytic Wealth RIA, LLC14,000$320.0K0.01%
Caxton Associates LLP11,730$268.1K0.01%
Oppenheimer & Co Inc11,297$258.2K0.00%
Brevan Howard Capital Management LP10,952$250.4K0.00%
Virtu Financial LLC10,268$235.0K0.01%
Maia Wealth LLC10,000$209.9K0.04%
Empowered Funds, LLC9,108$208.2K0.00%
Csenge Advisory Group9,000$205.7K0.01%
Simplex Trading, LLC4,764$108.0K0.00%
State of Alaska, Department of Revenue4,289$98.0K0.00%
Advisory Services Network, LLC3,261$74.5K0.00%
Atlantic Union Bankshares Corp400$9.14K0.00%
Alerus Financial NA325$7.43K0.00%
Quadrant Capital Group LLC311$7.11K0.00%
Wealthspire Advisors, LLC121$2.77K0.00%
Assetmark, Inc11$2510.00%
National Bank of Canada5$1140.00%
Guerra Advisors Inc0$90.00%

Sold out (28)

Institutions that held Sixth Street Specialty Lending, Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Not filed for Q3 2025 yet (5)

Institutions that held Sixth Street Specialty Lending, Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding TSLX in Q2 2025 that haven't filed for Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
Wambolt & Associates, LLC146,586$3.49M
Northeast Financial Consultants Inc26,000$619.1K
Atria Wealth Solutions, Inc.8,570$204.1K
Atlas Capital Advisors LLC5,115$121.8K
First Horizon Advisors, Inc.4,123$98.2K