Sixth Street Specialty Lending, Inc.
US ˙ NYSE ˙ US83012A1097

SecurityTSLX / Sixth Street Specialty Lending, Inc.
InstitutionArgent Trust Co
Latest Disclosed Ownership129,821 shares
Latest Disclosed Value $ 2,386,112
Argent Trust Co reports 4.42% decrease in ownership of TSLX / Sixth Street Specialty Lending, Inc.

On May 13, 2026 - Argent Trust Co filed a 13F-HR form disclosing ownership of 129,821 shares of Sixth Street Specialty Lending, Inc. (US:TSLX) valued at $2,386,110 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 135,826 shares of Sixth Street Specialty Lending, Inc.. This represents a change in shares of -4.42% during the quarter. The current value of the position is $2,242,009 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 129,821 -6,005 -4.42 2,386 -19.12 0.0810
2026-02-10 2025-12-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 135,826 2,108 1.58 2,950 -3.47 0.1012
2025-11-12 2025-09-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 133,718 -11,016 -7.61 3,057 -11.32 0.1083
2025-08-12 2025-06-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 144,734 38,390 36.10 3,446 44.85 0.1301
2025-05-09 2025-03-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 106,344 2,855 2.76 2,380 7.94 0.0977
2025-02-13 2024-12-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 103,489 -1,081 -1.03 2,204 2.70 0.0899
2024-11-13 2024-09-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 104,570 -722 -0.69 2,147 -4.49 0.0889
2024-08-12 2024-06-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 105,292 8,591 8.88 2,248 8.45 0.0990
2024-05-10 2024-03-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 96,701 7,526 8.44 2,072 7.58 0.0932
2024-02-09 2023-12-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 89,175 32,861 58.35 1,926 67.33 0.0958
2023-11-08 2023-09-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 56,314 -103 -0.18 1,151 9.20 0.0631
2023-08-11 2023-06-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 56,417 35 0.06 1,054 2.23 0.0571
2023-05-12 2023-03-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 56,382 2,413 4.47 1,032 7.40 0.0654
2023-02-10 2022-12-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 53,969 13,692 33.99 961 45.90 0.0635
2022-11-10 2022-09-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 40,277 16,402 68.70 658 48.87 0.0476
2022-08-11 2022-06-30 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 23,875 14,765 162.07 442 108.49 0.0303
2022-05-11 2022-03-31 13F SIXTH STREET SPECIALTY LENDING COMMON STOCK 83012A109 9,110 9,110 212 0.0129
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.