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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.

13F holders, Q4 2025

Institutional positions in Sixth Street Specialty Lending, Inc. as of Dec 31, 2025. 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
258
+15 vs. Q3 2025
Shares held
50.3M
+3.99M (+8.6%) vs. Q3 2025
Total value
$1.09B
+$40.1M (+3.8%) vs. Q3 2025
New holders
38
103 more added
Sold out
23
67 more reduced

4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 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.

Institutional holdersQ4 2025: 258 institutions
Q1 2021: 159 institutionsQ2 2021: 158 institutionsQ3 2021: 159 institutionsQ4 2021: 168 institutionsQ1 2022: 171 institutionsQ2 2022: 180 institutionsQ3 2022: 175 institutionsQ4 2022: 196 institutionsQ1 2023: 195 institutionsQ2 2023: 202 institutionsQ3 2023: 205 institutionsQ4 2023: 223 institutionsQ1 2024: 220 institutionsQ2 2024: 224 institutionsQ3 2024: 202 institutionsQ4 2024: 223 institutionsQ1 2025: 236 institutionsQ2 2025: 245 institutionsQ3 2025: 247 institutionsQ4 2025: 258 institutionsQ1 2026: 260 institutionsQ2 2026: 242 institutions
Value heldQ4 2025: $1.09B
Q1 2021: $758.6MQ2 2021: $808.3MQ3 2021: $813.5MQ4 2021: $855.4MQ1 2022: $825.9MQ2 2022: $655.5MQ3 2022: $601.1MQ4 2022: $643.2MQ1 2023: $621.2MQ2 2023: $705.0MQ3 2023: $806.6MQ4 2023: $889.5MQ1 2024: $936.0MQ2 2024: $962.2MQ3 2024: $904.9MQ4 2024: $963.5MQ1 2025: $1.07BQ2 2025: $1.16BQ3 2025: $1.11BQ4 2025: $1.09BQ1 2026: $955.4MQ2 2026: $896.5M
Institutions holding TSLX and their total value by quarter
QuarterHoldersValue
Q2 2026242$896.5M
Q1 2026260$955.4M
Q4 2025258$1.09B
Q3 2025247$1.11B
Q2 2025245$1.16B
Q1 2025236$1.07B
Q4 2024223$963.5M
Q3 2024202$904.9M
Q2 2024224$962.2M
Q1 2024220$936.0M
Q4 2023223$889.5M
Q3 2023205$806.6M
Q2 2023202$705.0M
Q1 2023195$621.2M
Q4 2022196$643.2M
Q3 2022175$601.1M
Q2 2022180$655.5M
Q1 2022171$825.9M
Q4 2021168$855.4M
Q3 2021159$813.5M
Q2 2021158$808.3M
Q1 2021159$758.6M

Institutions, Q4 2025

Shares, value and share of portfolio for each institution holding Sixth Street Specialty Lending, Inc.; share changes are against Q3 2025.

Institutions holding TSLX in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Pallas Capital Advisors LLC43,255$939.5K0.03%−1,361−3.1%Reduced
Park Circle Co40,145$871.9K0.79%00.0%Unchanged
Foundations Investment Advisors, LLC40,126$871.5K0.01%−1,720−4.1%Reduced
Evoke Wealth, LLC39,859$865.7K0.02%+10.0%Added
Essex Financial Services, Inc.39,522$858.4K0.05%−440−1.1%Reduced
Diversify Advisory Services, LLC38,454$857.5K0.03%+2,269+6.3%Added
Creative Planning39,337$854.4K0.00%−26,646−40.4%Reduced
Captrust Financial Advisors38,947$845.9K0.00%−10,717−21.6%Reduced
Dakota Wealth Management38,860$844.0K0.01%−780−2.0%Reduced
Ehrenkranz Partners L.P.37,474$813.9K0.92%00.0%Unchanged
Texas Yale Capital Corp.36,876$800.9K0.02%+1,376+3.9%Added
Nations Financial Group Inc,35,747$776.4K0.04%+436+1.2%Added
Platform Technology Partners34,444$748.1K0.16%+6,499+23.3%Added
Hennion & Walsh Asset Management, Inc.34,249$743.9K0.03%−1,032−2.9%Reduced
Closed-End Fund Advisors, Inc.34,249$743.9K0.44%+34,249New
Millennium Management LLC34,236$743.6K0.00%+34,236New
Ellsworth Advisors, LLC33,190$743.4K0.15%+2,252+7.3%Added
Invesco Ltd.33,463$726.8K0.00%−695−2.0%Reduced
Caxton Associates LLP33,356$724.5K0.01%+21,626+184.4%Added
Mariner, LLC32,142$698.1K0.00%−7,645−19.2%Reduced
Delphi Financial Group, Inc.32,041$695.9K0.35%+12,000+59.9%Added
Kestra Advisory Services, LLC30,870$670.5K0.00%−3,144−9.2%Reduced
TrueMark Investments, LLC30,312$658.4K0.13%+30,312New
AE Wealth Management LLC30,021$652.1K0.00%+20,562+217.4%Added
COFG Advisors, LLC29,761$646.4K0.16%+29,761New
Romano Brothers and Company29,700$645.1K0.07%00.0%Unchanged
Barnett & Company, Inc.29,250$635.3K0.51%−9,500−24.5%Reduced
Guggenheim Capital LLC28,593$621.0K0.00%+1,736+6.5%Added
Sargent Investment Group, LLC28,400$616.8K0.08%00.0%Unchanged
Ethos Financial Group, LLC27,774$603.3K0.04%−1,370−4.7%Reduced
Triad Investment Management26,602$577.8K0.59%+26,602New
Eagle Global Advisors LLC25,835$561.1K0.02%+7,540+41.2%Added
Natixis25,249$548.4K0.00%00.0%Unchanged
US Bancorp25,113$545.5K0.00%−27−0.1%Reduced
Virtus Investment Advisers, Inc.25,028$543.6K0.15%−1,962−7.3%Reduced
Merrion Investment Management Co, LLC25,000$543.0K0.29%00.0%Unchanged
Buckingham Strategic Partners24,867$540.1K0.01%−19,796−44.3%Reduced
Family Wealth Partners, LLC24,867$540.1K0.19%+602+2.5%Added
Sage Investment Counsel LLC24,777$538.2K0.59%00.0%Unchanged
Chicago Partners Investment Group LLC23,012$510.9K0.01%−357−1.5%Reduced
Parallel Advisors, LLC23,335$506.8K0.01%+5,294+29.3%Added
Magnus Financial Group LLC22,892$497.2K0.04%−883−3.7%Reduced
Silver Oak Securities, Inc21,867$477.6K0.03%−821−3.6%Reduced
Private Advisor Group, LLC21,947$476.7K0.00%+929+4.4%Added
Price T Rowe Associates Inc21,905$476.0K0.00%+968+4.6%Added
XTX Topco Ltd21,889$475.4K0.01%+21,889New
Catalytic Wealth RIA, LLC21,870$475.0K0.02%+7,870+56.2%Added
Quantbot Technologies LP21,654$470.3K0.02%+21,654New
IFG Advisory, LLC21,374$464.2K0.02%+215+1.0%Added
Mirador Capital Partners LP21,281$462.2K0.06%+178+0.8%Added
Kovack Advisors, Inc.21,273$462.0K0.02%+21,273New
Generali Investments CEE, investicni spolecnost, a.s.21,235$461.2K0.03%00.0%Unchanged
Whalerock Point Partners, LLC19,738$428.7K0.08%−1,991−9.2%Reduced
London & Capital Asset Management Ltd19,400$421.5K0.00%00.0%Unchanged
ProShare Advisors LLC19,311$419.4K0.00%−1,109−5.4%Reduced
Klein Pavlis & Peasley Financial, Inc.18,729$406.8K0.24%−416−2.2%Reduced
Sanctuary Advisors, LLC18,672$405.6K0.00%+114+0.6%Added
Monument Capital Management18,582$403.6K0.10%00.0%Unchanged
Clearstead Advisors, LLC18,000$391.0K0.00%00.0%Unchanged
Bank of New York Mellon Corp17,475$379.6K0.00%+1,866+12.0%Added
Investor's Fiduciary Advisor Network, LLC17,308$375.0K0.08%−5,482−24.1%Reduced
Evergreen Capital Management LLC16,470$357.7K0.01%−43−0.3%Reduced
Balyasny Asset Management LLC16,038$348.3K0.00%+16,038New
Heritage Trust Co15,889$345.1K0.04%00.0%Unchanged
Mallini Complete Financial Planning LLC15,464$335.9K0.27%+123+0.8%Added
Inspirion Wealth Advisors, LLC15,426$335.1K0.04%00.0%Unchanged
Angeles Wealth Management, LLC15,000$332.7K0.02%+15,000New
Prelude Capital Management, LLC15,261$331.5K0.02%−41,411−73.1%Reduced
Squarepoint Ops LLC15,047$326.8K0.00%+15,047New
Steward Partners Investment Advisory, LLC14,325$311.1K0.00%+3,464+31.9%Added
Principal Street Partners, LLC13,945$302.9K0.05%−625−4.3%Reduced
Jane Street Group, LLC13,796$299.6K0.00%+13,796New
Westmount Partners, LLC13,030$283.0K0.07%00.0%Unchanged
Pasadena Private Wealth, LLC12,789$277.8K0.04%+3,789+42.1%Added
Aigen Investment Management, LP12,586$273.4K0.06%+12,586New
Worth Asset Management, LLC12,560$272.8K0.12%−96−0.8%Reduced
Oppenheimer & Co Inc11,923$259.0K0.00%+626+5.5%Added
Core Wealth Partners LLC11,668$253.4K0.11%00.0%Unchanged
Laird Norton Trust Company, LLC11,514$250.1K0.01%+11,514New
GWM Advisors LLC11,444$248.6K0.00%−1,049−8.4%Reduced
Miller Global Investments, LLC10,367$225.2K0.20%+10,367New
Principle Wealth Partners LLC10,271$223.1K0.01%−1,430−12.2%Reduced
Stratos Wealth Partners, LTD.10,047$218.2K0.00%+532+5.6%Added
Mirae Asset Global Investments Co., Ltd.10,000$217.2K0.00%−4,759−32.2%Reduced
Baird Financial Group, Inc.9,885$214.7K0.00%+9,885New
Whipplewood Advisors, LLC9,816$213.2K0.14%+9,816New
Glenview Trust Co9,700$210.7K0.00%00.0%Unchanged
Maia Wealth LLC10,211$205.4K0.04%+211+2.1%Added
Register Financial Advisors LLC9,102$197.7K0.08%+19+0.2%Added
The PNC Financial Services Group, Inc.7,341$159.4K0.00%00.0%Unchanged
Comerica Bank6,834$148.4K0.00%+1,738+34.1%Added
Key Capital Management, INC6,316$137.2K0.14%+6,316New
Northwestern Mutual Wealth Management Co5,446$118.3K0.00%+5,446New
Vaughan Nelson Investment Management, L.P.5,350$116.2K0.00%00.0%Unchanged
Annis Gardner Whiting Capital Advisors, LLC5,235$113.7K0.02%00.0%Unchanged
EMC Capital Management5,202$113.0K0.05%−918−15.0%Reduced
Atlas Capital Advisors LLC5,115$111.1K0.01%+5,115New
SRS Capital Advisors, Inc.5,000$108.6K0.00%+5,000New
SG Americas Securities, LLC4,986$108.0K0.00%+4,986New
Signaturefd, LLC4,898$106.4K0.00%+334+7.3%Added