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TSLX · Sixth Street Specialty Lending, Inc. · Holdings

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$16.83 +0.02 (+0.12%) At close · Oct 20
Rebalance outlook locked
Market Cap
$1.62B
Shares
95.34M
Volume · Oct 20 341.45K Avg daily vol (3M) 466.5K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of TSLX: 13F, 13D and 13G, insiders and funds →
Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 243
Total Value: $905,227,546
Total Shares: 52,506,504
Showing 1–100 of 248 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 244 13F filers
Top Holder
11.5%
Sep 2023 → Jun 2026 · range 5.4% – 11.5%
of institutional value
Top 5
31.0%
Sep 2023 → Jun 2026 · range 24.7% – 31.0%
of institutional value
Top 10
47.0%
Sep 2023 → Jun 2026 · range 41.4% – 47.0%
of institutional value
HHI
338
Sep 2023 → Jun 2026 · range 248 – 338
Broadly held

Who Holds TSLX

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 242 filers, like-for-like change +0.4%; actively managed books 0.0%; index-like books +3.8%.

Holder type Share Filers Change
Registered adviser 42.2% 130 -1.7%
Exempt adviser 0.6% 2 -49.2%
Adviser 2.7% 8 +11.2%
Bank 11.6% 15 +7.1%
Insurer 0.2% 1 0.0%
Broker-dealer 1.3% 2 -2.8%
Benefit plan 15.4% 2 +27.5%
Non-US 0.2% 2 +4.5%
Holding company 5.1% 6 -10.3%
Unknown 20.5% 74 -9.0%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 2 holders with no observed 2026-03-31 13F and 3 holders with no observed 2026-06-30 13F.

Conviction and Crowding

242 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
4
1.65% of filers hold it in their top 10
Mar 31, 2026: 6
Holders above 5%
2
median weight 0.005%
Mar 31, 2026: 3
Crowding
14.3%
of shares outstanding, 42nd percentile
Mar 31, 2026: 13.8%
Private-fund advisers
14.1%
of shares outstanding
Institutional ownership
55.0%
55.4% of the estimated free float
Top 10 holders
47.4%
of 13F shares, Herfindahl 0.034
Active holders
0.0%
like-for-like share change of active filers
5% stakes on record
0
0 13D, 0 13G
How long holders have held it value-weighted 19.1 quarters
Under 1 year 6.44% 1 to 3 years 19.3% 3 years or more 74.3% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$19.66
estimated per share
Mar 31, 2026: $19.96
Quarter-end price
$17.17
implied by 13F values
Estimated gain or loss
-12.7%
price against the estimated cost
Estimated at a loss
94.5%
of costed 13F value

Estimated cost covers 94.2% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies TSLX's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 HTGC Hercules Capital, Inc. 18
2 GBDC GOLUB CAPITAL BDC, Inc. 22
3 ARCC Ares Capital Corp 35
4 BXSL Blackstone Secured Lending Fund 21
5 OBDC Blue Owl Capital Corp 21
6 CSWC Capital Southwest Corp 11
7 MSDL Morgan Stanley Direct Lending Fund 10
8 TRIN Trinity Capital Inc. 8
9 CGBD Carlyle Secured Lending, Inc. 7
10 BCSF Bain Capital Specialty Finance, Inc. 7

Shareholder Targets

13F filers that own its peers but not TSLX, quarter ended Jun 30, 2026

Found through its holder-overlap peers: HTGC, GBDC, ARCC, BXSL, OBDC, CSWC, MSDL, TRIN, CGBD, BCSF, TCPC, CCAP, OCSL, GSBD, FDUS, LADR, PFLT, PINE, PSTL, SBRA. 1,326 filers in all.

# Filer In peers
1 VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active $513,069,133 4 held
2 PRINCIPAL FINANCIAL GROUP INC Insurer, Diversified active $483,187,277 2 held
3 Generali Asset Management SPA SGR Unknown, Diversified active $366,501,702 7 held
4 VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like $312,931,897 4 held
5 GEODE CAPITAL MANAGEMENT, LLC Registered adviser, Index-like $211,980,842 7 held
6 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan, Index-like $185,842,761 5 held
7 State of New Jersey Common Pension Fund A Unknown, Unknown $165,918,299 1 held
8 OREGON PUBLIC EMPLOYEES RETIREMENT FUND Unknown, Index-like $159,380,914 2 held
9 Bain Capital Credit, LP Registered adviser, Concentrated $148,016,861 1 held
10 Ensign Peak Advisors, Inc Unknown, Diversified active $144,485,775 5 held

Fund Ownership of TSLX by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 2.19% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.01% 6,199
Index ETFs 2.19% 2,085,009
Active ETFs 0.95% 905,735
Active funds 0.21% 201,331
Unclassified 0.00% 0
All registered funds 3.35% 3,198,274
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 129 Exempt adviser 2 Adviser 8 Bank 15 Insurer 1 Broker-dealer 3 Benefit plan 2 Non-US 2 Holding company 6 Unknown 75
Showing 100 of 248
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
STRS OHIO $103,522,754 11.44% 6,029,281
Sixth Street Partners Management Company, L.P. $46,603,260 5.15% 2,714,226
Sound Income Strategies, LLC $45,060,289 4.98% 2,500,571
Progeny 3, Inc. $42,519,753 4.70% 2,476,398
UBS Group AG $40,749,130 4.50% 2,373,275
VAN ECK ASSOCIATES CORP $40,628,786 4.49% 2,366,266
OMERS ADMINISTRATION Corp $34,551,654 3.82% 2,012,327
ARES MANAGEMENT LLC $24,120,055 2.66% 1,404,779
Allen Investment Management, LLC $23,504,682 2.60% 1,368,939
WELLS FARGO & COMPANY/MN $22,597,281 2.50% 1,316,091
Cerity Partners LLC $20,736,483 2.29% 1,207,716
Callodine Capital Management, LP $20,193,293 2.23% 1,176,080
Muzinich & Co., Inc. $18,461,630 2.04% 1,075,226
MORGAN STANLEY $18,364,549 2.03% 1,069,572
RIVERNORTH CAPITAL MANAGEMENT, LLC $16,648,014 1.84% 969,599
Advisors Capital Management, LLC $14,836,717 1.64% 864,107
TECTONIC ADVISORS LLC $14,512,134 1.60% 845,203
Sumitomo Mitsui Trust Group, Inc. $13,606,400 1.50% 792,452
LSV ASSET MANAGEMENT $13,548,847 1.50% 789,100
Legal & General Group Plc $13,526,422 1.49% 787,794
BANK OF AMERICA CORP /DE/ $13,126,018 1.45% 764,474
RAYMOND JAMES FINANCIAL INC $12,651,078 1.40% 736,813
FRANKLIN RESOURCES INC $12,357,403 1.37% 719,709
SCS Capital Management LLC $11,885,056 1.31% 692,199
Pathstone Holdings, LLC $11,541,021 1.27% 672,162
LPL Financial LLC $11,188,830 1.24% 651,650
GOLDMAN SACHS GROUP INC $10,727,334 1.19% 624,772
Gilman Hill Asset Management, LLC $9,091,432 1.00% 504,519
JPMORGAN CHASE & CO $8,714,015 0.96% 507,514
Cresset Asset Management, LLC $8,605,449 0.95% 501,191
NEUBERGER BERMAN GROUP LLC $8,519,170 0.94% 496,166
Melia Wealth LLC $8,350,406 0.92% 486,337
BlackRock, Inc. $7,484,453 0.83% 435,903
National Philanthropic Trust $6,026,670 0.67% 351,000
MGO ONE SEVEN LLC $5,903,801 0.65% 343,844
IFP Advisors, Inc $5,778,491 0.64% 320,671
Altshuler Shaham Ltd $5,176,068 0.57% 301,460
RMR Capital Management, LLC $4,869,051 0.54% 283,579
Janney Montgomery Scott LLC $4,620,069 0.51% 269,078
CONFLUENCE INVESTMENT MANAGEMENT LLC $3,895,814 0.43% 216,194
Qube Research & Technologies Ltd $3,853,016 0.43% 224,404
Advisors Asset Management, Inc. $3,620,002 0.40% 210,833
D.A. DAVIDSON & CO. $3,617,238 0.40% 210,672
STIFEL FINANCIAL CORP $3,554,927 0.39% 207,043
Lighthouse Investment Partners, LLC $3,494,764 0.39% 203,539
Truvestments Capital LLC $3,179,145 0.35% 185,157
Parkwood LLC $3,173,342 0.35% 184,819
CANADA LIFE ASSURANCE Co $3,018,486 0.33% 175,800
Texas Capital Bank Wealth Management Services Inc $3,016,768 0.33% 175,700
Naviter Wealth, LLC $2,595,915 0.29% 151,189
Universal- Beteiligungs- und Servicegesellschaft mbH $2,585,321 0.29% 150,572
Clayton Partners LLC $2,580,307 0.29% 150,280
LAZARD ASSET MANAGEMENT LLC $2,569,988 0.28% 149,679
Waterloo Capital, L.P. $2,479,451 0.27% 144,406
Atom Investors LP $2,478,300 0.27% 144,339
RIVERBRIDGE PARTNERS LLC $2,465,388 0.27% 143,587
IHT Wealth Management, LLC $2,453,077 0.27% 142,870
DENALI ADVISORS LLC $2,389,840 0.26% 139,187
Russell Investments Group, Ltd. $2,382,594 0.26% 138,765
BENJAMIN EDWARDS INC $2,371,056 0.26% 138,093
Argent Trust Co $2,327,633 0.26% 135,564
STATE STREET CORP $2,319,151 0.26% 135,070
Wealthstar Advisors, LLC $2,254,626 0.25% 125,118
Plan Group Financial, LLC $2,065,963 0.23% 120,324
COMMONWEALTH EQUITY SERVICES, LLC $2,047,831 0.23% 119,268
Delphi Financial Group, Inc. $1,994,140 0.22% 116,141
JANE STREET GROUP, LLC $1,938,493 0.21% 112,900
TWO SIGMA INVESTMENTS, LP $1,937,789 0.21% 112,859
AMERIPRISE FINANCIAL INC $1,827,660 0.20% 106,445
Ilex Capital Partners (UK) LLP $1,806,249 0.20% 105,198
Lifetime Wealth Management P.C. $1,741,793 0.19% 101,444
ENVESTNET ASSET MANAGEMENT INC $1,734,307 0.19% 101,008
BNP PARIBAS ARBITRAGE, SA $1,732,641 0.19% 100,911
INDEPENDENT FINANCIAL GROUP, LLC $1,714,170 0.19% 95,126
AE Wealth Management LLC $1,686,162 0.19% 98,204
Ignite Planners, LLC $1,573,686 0.17% 87,330
Legacy Capital Wealth Partners, LLC $1,551,807 0.17% 90,379
Lido Advisors, LLC $1,503,645 0.17% 87,574
ROYAL BANK OF CANADA $1,439,034 0.16% 83,811
PEAK6 LLC $1,356,430 0.15% 79,000
CITADEL ADVISORS LLC $1,243,108 0.14% 72,400
SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,207,051 0.13% 70,300
HRT FINANCIAL LP $1,204,715 0.13% 70,164
Cetera Investment Advisers $1,178,892 0.13% 68,660
D. E. Shaw & Co., Inc. $1,178,703 0.13% 68,649
SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,100,597 0.12% 64,100
Hennion & Walsh Asset Management, Inc. $952,375 0.11% 52,851
OSAIC HOLDINGS, INC. $940,177 0.10% 54,757
Savvy Advisors, Inc. $937,207 0.10% 54,584
Tidal Investments LLC $913,770 0.10% 53,219
Main Street Financial Solutions, LLC $880,958 0.10% 51,308
Whipplewood Advisors, LLC $873,519 0.10% 48,475
TRED AVON FAMILY WEALTH, LLC $824,162 0.09% 45,736
BROWN ADVISORY INC $798,439 0.09% 46,502
Diversify Advisory Services, LLC $795,150 0.09% 44,126
DIVERSIFY WEALTH MANAGEMENT, LLC $795,150 0.09% 44,126
FAMILY WEALTH PARTNERS, LLC $740,784 0.08% 41,109
Ehrenkranz Partners L.P. $738,567 0.08% 43,015
PARK CIRCLE Co $689,289 0.08% 40,145
Canton Hathaway, LLC $684,482 0.08% 39,865

Showing the top 100 of 248 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1508655 CUSIP 83012A109 13F (30d) 34 filings 34 filers Visit website Investor relations