Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in TSLX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | STRS OHIO | 4.3M | $79.9M | +101.8% | 4.576% | 0.32% |
| 2 | Sixth Street Partners Management Company, L.P. | 2.7M | $49.9M | 0.0% | 2.857% | 7.02% |
| 3 | Sound Income Strategies, LLC | 2.6M | $46.6M | +2.4% | 2.706% | 2.25% |
| 4 | Progeny 3, Inc. | 2.5M | $45.5M | 0.0% | 2.606% | 2.43% |
| 5 | OMERS ADMINISTRATION Corp | 2.0M | $36.1M | +318.2% | 2.065% | 0.23% |
| 6 | UBS Group AG | 1.9M | $34.2M | +15.0% | 1.956% | 0.01% |
| 7 | Allen Investment Management LLC | 1.4M | $25.7M | -10.5% | 1.469% | 0.32% |
| 8 | ARES MANAGEMENT LLC | 1.4M | $24.9M | 0.0% | 1.426% | 1.64% |
| 9 | WELLS FARGO & COMPANY/MN | 1.3M | $24.6M | +5.3% | 1.409% | 0.01% |
| 10 | MORGAN STANLEY | 1.3M | $24.4M | -44.5% | 1.397% | 0.00% |
| 11 | Cerity Partners LLC | 1.1M | $20.9M | +195.2% | 1.196% | 0.03% |
| 12 | Callodine Capital Management, LP | 1.1M | $20.8M | +2.5% | 1.189% | 1.45% |
| 13 | Muzinich & Co., Inc. | 1.0M | $19.2M | +5.5% | 1.102% | 6.73% |
| 14 | RAYMOND JAMES FINANCIAL INC | 919K | $16.9M | +2.5% | 0.967% | 0.01% |
| 15 | Advisors Capital Management, LLC | 785K | $14.4M | +2.3% | 0.827% | 0.17% |
| 16 | Sumitomo Mitsui Trust Holdings, Inc. | 770K | $14.2M | +3.9% | 0.810% | 0.01% |
| 17 | STIFEL FINANCIAL CORP | 751K | $13.8M | +19.7% | 0.790% | 0.01% |
| 18 | BANK OF AMERICA CORP /DE/ | 736K | $13.5M | -2.3% | 0.774% | 0.00% |
| 19 | Legal & General Group Plc | 733K | $13.5M | +10.1% | 0.771% | 0.00% |
| 20 | TECTONIC ADVISORS LLC | 728K | $13.4M | +17.9% | 0.766% | 0.71% |
| 21 | LPL Financial LLC | 673K | $12.4M | -3.0% | 0.708% | 0.00% |
| 22 | SCS Capital Management LLC | 666K | $12.2M | +2.5% | 0.701% | 0.13% |
| 23 | GOLDMAN SACHS GROUP INC | 640K | $11.8M | +2.5% | 0.673% | 0.00% |
| 24 | ENVESTNET ASSET MANAGEMENT INC | 639K | $11.8M | +1.0% | 0.673% | 0.00% |
| 25 | Qube Research & Technologies Ltd | 612K | $11.2M | +127.0% | 0.644% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in TSLX — a direct measure of their conviction.
Filings activity in TSLX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new TSLX position in Q1 2026
Institutions that fully closed their TSLX position in Q1 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 253 | +1.2% | 55.16% | 10.22 pp | $886M | 16% |
| Q4 2025 | 250 | +4.2% | 65.38% | 0.94 pp | $1.05B | 1.4% |
| Q3 2025 | 240 | +1.3% | 66.32% | 3.70 pp | $1.07B | 5.3% |
| Q2 2025 | 237 | +4.4% | 70.02% | +10.27 pp | $1.12B | +17% |
| Q1 2025 | 227 | +5.1% | 59.75% | +6.30 pp | $959M | +12% |
| Q4 2024 | 216 | +11% | 53.45% | +3.99 pp | $858M | +8.1% |
| Q3 2024 | 195 | 8.9% | 49.46% | 3.21 pp | $794M | 6.1% |
| Q2 2024 | 214 | — | 52.67% | — | $846M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Latest Form 4 transactions by company officers and directors. Insider buys are widely viewed as the highest-conviction signal because executives are risking personal capital.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| May 11, 2026 | Bruck Ross Anthony | Buy | 8K | $17.76 | $142K |
Quick answers to the most common questions about buying TSLX stock.
Based on Q1 2026 13F filings, institutional ownership of Sixth Street Specialty Lending, Inc. stands at 55.2%, held across 253 reporting institutions.
STRS OHIO is the largest reported institutional holder of TSLX, with approximately 4,347,710 shares worth $0.08B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of TSLX.
Our composite Smart Money Score for TSLX is 27 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
47 institutions opened new positions in TSLX during Q1 2026, while 44 fully exited. 33 added to existing positions and 172 trimmed.
TSLX institutional ownership fell by 10.22 percentage points quarter-over-quarter, with a net change of +3 holders.
The top 10 institutions account for 44.2% of all reported 13F value in TSLX, and the top 25 account for 69.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Sixth Street Specialty Lending, Inc. (TSLX) Institutional Ownership