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

SecurityTSLX / Sixth Street Specialty Lending, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership1,858,267 shares
Latest Disclosed Value $ 34,154,947
UBS Group AG reports 14.98% increase in ownership of TSLX / Sixth Street Specialty Lending, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 1,858,267 shares of Sixth Street Specialty Lending, Inc. (US:TSLX) valued at $34,154,947 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 1,616,161 shares of Sixth Street Specialty Lending, Inc.. This represents a change in shares of 14.98% during the quarter. The current value of the position is $32,835,578 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)
2026-05-05 2026-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 1,858,267 242,106 14.98 34,155 -2.70 0.0010
2026-01-29 2025-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 1,616,161 299,564 22.75 35,103 16.63 0.0010
2025-11-13 2025-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 1,316,597 130,586 11.01 30,097 6.58 0.0047
2025-08-14 2025-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 1,186,011 310,286 35.43 28,239 44.09 0.0049
2025-05-13 2025-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 875,725 436,967 99.59 19,599 109.72 0.0036
2025-02-14 2024-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 438,758 38,027 9.49 9,346 13.59 0.0017
2024-11-14 2024-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 400,731 -57,170 -12.49 8,227 -15.84 0.0018
2024-08-14 2024-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 457,901 33,989 8.02 9,776 7.62 0.0024
2024-05-13 2024-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 423,912 -56,014 -11.67 9,084 -12.37 0.0023
2024-02-09 2023-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 479,926 19,486 4.23 10,366 10.15 0.0031
2023-11-09 2023-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 460,440 53,871 13.25 9,411 23.86 0.0032
2023-08-11 2023-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 406,569 97,229 31.43 7,599 34.24 0.0026
2023-05-12 2023-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 309,340 -3,496 -1.12 5,661 1.65 0.0021
2023-02-08 2022-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 312,836 -32,712 -9.47 5,568 -1.38 0.0021
2022-11-10 2022-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 345,548 49,505 16.72 5,646 3.09 0.0025
2022-08-10 2022-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 296,043 -8,509 -2.79 5,477 -22.79 0.0022
2022-05-16 2022-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 304,552 11,264 3.84 7,094 3.41 0.0024
2022-02-14 2021-12-31 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 293,288 -8,415 -2.79 6,860 2.37 0.0020
2021-11-15 2021-09-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 301,703 -2,418 -0.80 6,701 -0.70 0.0021
2021-08-13 2021-06-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 304,121 79,162 35.19 6,748 42.63 0.0022
2021-05-12 2021-03-31 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 224,959 40,048 21.66 4,731 23.33 0.0016
2021-02-11 2020-12-31 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 184,911 -43,707 -19.12 3,836 -2.49 0.0013
2020-11-12 2020-09-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 228,618 14,250 6.65 3,934 11.29 0.0015
2020-07-31 2020-06-30 13F SIXTH STREET SPECIALTY LENDN COM 83012A109 214,368 214,368 3,535 0.0015
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.