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

SecurityTSLX / Sixth Street Specialty Lending, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership750,754 shares
Latest Disclosed Value $ 13,798,884
Stifel Financial Corp reports 19.74% increase in ownership of TSLX / Sixth Street Specialty Lending, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 750,754 shares of Sixth Street Specialty Lending, Inc. (US:TSLX) valued at $13,798,859 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 626,976 shares of Sixth Street Specialty Lending, Inc.. This represents a change in shares of 19.74% during the quarter. The current value of the position is $13,055,612 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)
2026-05-12 2026-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 750,754 123,778 19.74 13,799 1.33 0.0030
2026-02-13 2025-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 626,976 14,449 2.36 13,618 -2.75 0.0122
2025-11-12 2025-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 612,527 -50,585 -7.63 14,002 -11.31 0.0128
2025-08-14 2025-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 663,112 -27,786 -4.02 15,789 2.11 0.0154
2025-05-14 2025-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 690,898 52,105 8.16 15,462 13.64 0.0164
2025-02-13 2024-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 638,793 87,798 15.93 13,606 20.29 0.0142
2024-11-14 2024-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 550,995 27,960 5.35 11,312 1.30 0.0119
2024-08-13 2024-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 523,035 12,845 2.52 11,167 2.13 0.0126
2024-05-14 2024-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 510,190 33,111 6.94 10,933 6.10 0.0125
2024-02-12 2023-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 477,079 31,233 7.01 10,305 13.07 0.0130
2023-11-13 2023-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 445,846 67,649 17.89 9,113 28.93 0.0128
2023-08-14 2023-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 378,197 -11,780 -3.02 7,068 -0.95 0.0097
2023-05-12 2023-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 389,977 79,080 25.44 7,137 28.97 0.0102
2023-02-13 2022-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 310,897 -78 -0.03 5,534 8.90 0.0083
2022-11-14 2022-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 310,975 46,769 17.70 5,081 3.95 0.0083
2022-08-15 2022-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 264,206 46,743 21.49 4,888 -3.48 0.0077
2022-05-13 2022-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 217,463 -1,775 -0.81 5,064 -1.25 0.0069
2022-02-14 2021-12-31 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 219,238 27,897 14.58 5,128 20.69 0.0068
2021-11-15 2021-09-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 191,341 -2,681 -1.38 4,249 -1.30 0.0062
2021-08-13 2021-06-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 194,022 37,360 23.85 4,305 30.65 0.0064
2021-05-14 2021-03-31 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 156,662 20,477 15.04 3,295 16.64 0.0054
2021-02-12 2020-12-31 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 136,185 62,037 83.67 2,825 121.39 0.0050
2020-11-16 2020-09-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 74,148 -10,964 -12.88 1,276 -9.05 0.0026
2020-08-14 2020-06-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 85,112 85,112 1,403 0.0032
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.