Sixth Street Specialty Lending TSLX Institutional Ownership

Updated Oct 11, 2026

Sixth Street Specialty Lending, Inc. (NYSE:TSLX) appeared in the 13F filings of 239 institutional investors for the quarter ended June 30, 2026.

• These investors held 51.89% of outstanding shares in Q2 2026, down from 55.34% the quarter before.
• Total shares held in Sixth Street Specialty Lending fell 5.92% versus Q1 2026, while the number of holders fell 1.24% versus Q2 2025.
• Looking at the 239 holders of TSLX individually, 112 added to their positions, 77 reduced their stakes and 50 left their positions unchanged.
• In total, institutional investors held 49.47Mn shares of Sixth Street Specialty Lending at the end of Q2 2026, down 3.11Mn from the prior quarter and up 2.55Mn from a year earlier.
• STRS Ohio was the top holder of Sixth Street Specialty Lending as of June 30, 2026, with 6.03Mn shares, or 6.32% of shares outstanding.
• Among existing holders, the largest additions to Sixth Street Specialty Lending in Q2 2026 came from STRS Ohio (+1.68Mn shares), Rivernorth Capital Management, LLC (+678.65K shares), Van Eck Associates Corp (+519.46K shares), UBS Group AG (+515.01K shares) and Pathstone Holdings, LLC (+229.26K shares).
• The largest position reductions in TSLX for Q2 2026 were by Stifel Financial Corp (-543.71K shares), Envestnet Asset Management Inc (-538.38K shares), Cetera Investment Advisers (-529.69K shares), Qube Research & Technologies Ltd (-387.4K shares) and Two Sigma Investments, LP (-300.11K shares).
• Per Business Quant data, the 10 largest holders of Sixth Street Specialty Lending at the end of Q2 2026 were STRS Ohio (6.03Mn shares), Sound Income Strategies, LLC (2.71Mn shares), Progeny 3, Inc. (2.48Mn shares), UBS Group AG (2.37Mn shares), Van Eck Associates Corp (2.37Mn shares), Omers Administration Corp (2.01Mn shares), Ares Management LLC (1.4Mn shares), Allen Investment Management, LLC (1.37Mn shares), Wells Fargo & Company (1.32Mn shares) and Cerity Partners LLC (1.21Mn shares).