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TSLX Sixth Street Specialty Lending, Inc. Insider Trading

Latest: Vice President Bought $142K of Shares · May 2026

Multiple insiders have been active at Sixth Street Specialty Lending, Inc. (TSLX): 9 distinct insiders account for 12 buy filings and 0 sell filings as of May 2026. Its highest-significance filing in the last 90 days: Vice President Bruck Ross Anthony bought $142K, transaction dated May 2026.

12 filings analyzed · Latest 2026-05-13

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Buys
12
Sells
0
Insiders
9
Direction
Net buying

Sixth Street Specialty Lending, Inc. leadership

CEO
Robert “Bo” Stanley — Chief Executive Officer
CFO
Ian Simmonds — Chief Financial Officer
General Counsel
Anton Brett — Chief Compliance Officer and Secretary
High conviction

This is a high-conviction signal — the insider is a first-time or occasional buyer, historically the strongest subset. Such buys have outperformed the S&P 500 by a median ~3% over the 30 days after the trade (n ≈ 3,001, 2024-2026). Past results don't predict the future. How we measure this ↗

May 2026
2026-05-13
high
Vice President
8,000 shares
$142,080
@ $17.76
Significance 7

Vice President Bruck Ross Anthony purchases 8,000 shares of TSLX at $17.76 amid stock weakness and recent quarterly loss.

Bruck Ross Anthony, a Vice President at Sixth Street Specialty Lending, purchased 8,000 shares on the open market, expanding his direct stake from 10,250 to 18,250 shares. This is his first open-market purchase in the 36-month filing window, marking a notable shift to active ownership building. The purchase occurred while the stock trades well below its 52-week high and has declined over the past three months, yet the company remains fundamentally profitable on an annual basis despite a recent quarterly loss. Anthony's willingness to deploy capital at this price level—particularly given his prior inactivity in the market—warrants attention as a single officer's direct buying pattern at a meaningful scale.

March 2026
2026-03-11
medium
Vice President
245,000 shares
$4,467,150
@ $18.23
Significance 6

VP Alan Waxman buys 245,000 shares across 2 transactions for $4,467,150 at TSLX; 5 other insiders also bought in past 14 days

Waxman executed 2 separate purchases totaling 245,000 shares (245.0K shares) for $4,467,150.00, expanding his holdings from 300,000 to 545,000 shares. The stock is trading at $18.39, down 26.7% from its 52-week high of $25.10, and down 7.8% over the past 30 days. A cluster pattern exists: 5 other insiders also bought within the past 14 days. The company trades at a P/E of 9.94 on net income of $44,600,000.00. The combination of substantial personal capital deployed by a Vice President, simultaneous accumulation by multiple insiders over a compressed timeframe, and the stock's pronounced recent decline from its 52-week highs warrants monitoring of the company's near-term fundamentals and whether this coordinated buying signals management's assessment of valuation or reflects other business considerations.

2026-03-10
medium
7,500 shares
$137,625
@ $18.35
Significance 5

Director Covington P Emery doubled TSLX holdings to 15,000 shares with $137.6K buy at $18.35; 5 other insiders bought in past 14 days.

Director Covington P Emery purchased 7,500 shares at $18.35, doubling his position from 7,500 to 15,000 shares. The transaction occurs within a cluster pattern: 5 other insiders also bought within the past 14 days, which suggests coordinated insider interest at current price levels. However, the stock trades 26.6% below its 52-week high of $25.10 and has declined 19.1% over 90 days, indicating the purchase follows significant recent weakness. Emery's own prior transaction at TSLX (buy on 2024-05-21) showed a 90-day return of -2.8%, and his cross-ticker track record shows a 0.00% 90-day win rate across 1 prior buy, providing no statistical support for timing precision on his open-market decisions.

2026-03-09
high
Vice President
300,000 shares
$5,530,000
@ $18.43
Significance 6

Waxman (VP, TSLX) bought 300,000 shares for $5,530,000 across 2 transactions; stock down 26.7% from 52-week high; cluster of 5 other insider buys in past 14 days

Vice President Alan Waxman purchased 300,000 shares across 2 separate transactions on 2026-03-05 and 2026-03-06, deploying $5,530,000 at a blended average price of $18.43. This constitutes a new position (moving from 0 to 300,000 shares). Notably, 5 other insiders have also purchased within the past 14 days, forming a cluster buy pattern. While the stock is currently trading at $18.39 against a 52-week high of $25.10 (down 26.7%) and has declined 18.4% over 90 days, the company maintains a 9.94 P/E ratio and $44.6M in net income. The convergence of multiple insider purchases during a period of price weakness warrants attention, though Waxman's own cross-ticker track record shows only 1 prior buy, limiting historical context for assessing execution quality at this ticker.

2026-03-04
high
Vice President
20,200 shares
$356,530
@ $17.65
Significance 7

VP Stiepleman buys 20,200 shares of TSLX at $17.65; 4-insider cluster buy in 14 days as stock down 26.4% from high

David Stiepleman, Vice President, purchased 20,200 shares at $17.65 on 2026-03-02, increasing his holdings by +365.0% from 5,535 to 25,735 shares for a total investment of $356,530.00. This transaction occurs within a cluster pattern: 3 other insiders have also bought TSLX within the past 14 days. The timing coincides with material price weakness — the stock is -26.4% from its 52-week high of $25.10 and down 13.5% over 30 days, while the company maintains a reasonable P/E of 9.99 on net income of $44,600,000.00. The coordinated buying activity by multiple insiders at depressed levels relative to recent history suggests alignment on valuation, though the current price of $18.48 remains 4.6% above the transaction execution price.

2026-03-03
high
Vice President
15,000 shares
$265,800
@ $17.72
Significance 7

VP Pluss Steven bought 15,000 shares of TSLX at $17.72 on 2026-02-27; cluster pattern with 3 other insiders buying in past 14 days

Vice President Steven Pluss purchased 15,000 shares at $17.72, increasing his holdings by 41.1% to 51,500 shares. This transaction is part of a cluster pattern in which 3 other insiders also bought within the past 14 days, suggesting coordinated or independent accumulation at a time when the stock is down 19.0% over 30 days and 29.1% below its 52-week high of $25.10. The buy occurs at a valuation of P/E 9.62 with the company reporting $44.6M in net income. The presence of multiple insider purchases within a 14-day window warrants attention as a potential signal of insider confidence despite recent negative price momentum.

2026-03-03
high
Vice President
2,840 shares
$49,956
@ $17.59
Significance 7

VP Joshua Peck bought 2,840 TSLX shares at $17.59; cluster of 3 other insiders also bought in 14 days.

Joshua Peck, Vice President, purchased 2,840 shares at $17.59 on 2026-03-02 for a total value of $49,955.60, expanding his position from 300 shares to 3,140 shares—a net increase of +946.7% relative to pre-transaction holdings. This transaction occurs as part of a cluster pattern in which 3 other insiders also bought within the past 14 days, suggesting coordinated buying activity across the leadership group. The purchase comes while the stock trades 29.1% below its 52-week high of $25.10 and has declined 19.0% over the past 30 days and 19.9% over the past 90 days. The company trades at a 9.62 P/E against $44.6M in net income and a $1.7B market cap, providing fundamental context for evaluating insider appetite at this valuation.

2026-03-02
medium
See Remarks
1,000 shares
$18,260
@ $18.26
Significance 5

Graf Michael bought 1,000 TSLX shares at $18.26; cluster of 3 other insiders buying in past 14 days amid -19.6% 30-day decline.

Graf Michael purchased 1,000 shares of Sixth Street Specialty Lending at $18.26 on 2026-02-26, increasing his holdings by 16.1% to 7,204 shares. The purchase occurs within a cluster of 3 other insider buys in the past 14 days, a pattern that may indicate coordinated assessment at current levels. However, context is mixed: the stock has declined 19.6% over the past 30 days and sits 29.7% below its 52-week high of $25.10, trading at $17.64. While TSLX trades at a low P/E of 9.54 with $44.6M in net income and a $1.7B market cap, Graf's prior buy at this ticker on 2024-11-20 yielded a 30-day return of 2.3%, suggesting modest near-term gains after prior purchases. The cluster activity warrants monitoring to determine whether multiple insiders view current prices as attractive or whether external factors are driving coordinated action.

November 2025
2025-11-20
high
Co-CEO
10,000 shares
$208,500
@ $20.85
Significance 6

Co-CEO Stanley Robert J. buys 10,000 shares of TSLX at $20.85; holdings rise 67.1% to 24,907 shares

Stanley Robert J., as Co-CEO, purchased 10,000 shares at $20.85 on 2025-11-18, increasing his holdings by 67.1% from 14,907 to 24,907 shares. The transaction occurred when the stock trades at $20.71 current price, down 5.5% over 30 days and 14.0% over 90 days, placing it 17.5% below its 52-week high of $25.10. With a P/E ratio of 10.20 and market cap of $1,956,969,186.75, the company shows solid fundamentals with $44,600,000.00 in net income. The substantial increase in the Co-CEO's personal position during a period of recent price weakness merits investor attention as a potential signal of confidence in the company's valuation and near-term prospects.

November 2024
2024-11-22
low
See Remarks
1,000 shares
$20,530
@ $20.53
Significance 4

Michael Graf buys 1,000 TSLX shares at $20.53; holdings increase to 5,605 shares (+21.7%)

Michael Graf purchased 1,000 shares of TSLX at $20.53 on 2024-11-20, increasing his holdings by 21.7% to a post-transaction total of 5,605 shares. This follows a single prior open-market buy at the same ticker on 2024-08-07, which generated a 30-day return of +3.7% but a 90-day return of -1.3%. The current stock price of $20.78 sits -6.6% from the 52-week high of $22.26, placing the transaction near recent lows. However, Graf's timing track record on this ticker—with 0 of 1 prior buys well-timed at the 90-day horizon—provides limited evidence of forward-looking accuracy. The company trades at a P/E of 10.39 with a market cap of $1,939,140,164.38 and net income of $40,655,000.00, suggesting a mature, dividend-oriented financial company. The transaction size and frequency remain modest, and without additional context, the buy signals continued interest rather than any urgency or exceptional conviction.