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

SecurityTSLX / Sixth Street Specialty Lending, Inc.
InstitutionWe Are One Seven, LLC
Latest Disclosed Ownership358,394 shares
Latest Disclosed Value $ 6,587,292
We Are One Seven, LLC reports 2.08% decrease in ownership of TSLX / Sixth Street Specialty Lending, Inc.

On May 14, 2026 - We Are One Seven, LLC filed a 13F-HR form disclosing ownership of 358,394 shares of Sixth Street Specialty Lending, Inc. (US:TSLX) valued at $6,587,282 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 366,017 shares of Sixth Street Specialty Lending, Inc.. This represents a change in shares of -2.08% during the quarter. The current value of the position is $6,232,472 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)
2026-05-14 2026-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 358,394 -7,623 -2.08 6,587 -17.13 0.1323
2026-02-03 2025-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 366,017 -32,261 -8.10 7,950 -12.69 0.1622
2025-10-24 2025-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 398,278 -29,562 -6.91 9,105 -10.62 0.2103
2025-07-25 2025-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 427,840 12,650 3.05 10,187 9.63 0.3276
2025-05-08 2025-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 415,190 20,796 5.27 9,292 10.61 0.3605
2025-02-14 2024-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 394,394 38,240 10.74 8,401 14.90 0.3211
2024-10-15 2024-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 356,154 -30,421 -7.87 7,312 -11.41 0.3160
2024-08-07 2024-06-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 386,575 -58,400 -13.12 8,253 -13.45 0.3913
2024-05-14 2024-03-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 444,975 -108,901 -19.66 9,536 -20.30 0.4955
2024-02-14 2023-12-31 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 553,876 537,964 3,380.87 11,964 3,580.92 0.6861
2023-11-03 2023-09-30 13F SIXTH STREET SPECIALTY LENDI COM 83012A109 15,912 15,912 325 0.0250
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.