Bullish Cluster at TSLX: $6.3M Insider Purchases Near 52-Week Lows

Sixth Street Specialty Lending, Inc. (TSLX:US) is a business development company (BDC) that provides customized financing solutions to middle-market companies, primarily through senior secured loans, subordinated debt, and equity co-investments. As of early March 2026, the company has a market capitalization of approximately $1.7-1.8 billion.

Insider Cluster Buying

Insider activity at Sixth Street Specialty Lending was notably bullish in late February to early March 2026, with multiple vice presidents and a director making open-market purchases totaling over $6.3 million. This cluster of buys, concentrated around $17.59-$18.46 per share, reflects strong internal conviction amid the stock's pullback:

• On March 6, 2026, Alan Waxman, Vice President, purchased 200,000 shares of common stock at $18.42 per share, for $3.684 million. 

• Also on March 6, 2026, P. Emery Covington, Independent Director, bought 7,500 shares at $18.35 per share, valued at $137,625, increasing holdings to 15,000 shares.

• On March 5, 2026, Waxman acquired another 100,000 shares at $18.46 per share, for $1.846 million (part of his total $5.53 million accumulation over two days).

• On March 2, 2026, David Stiepleman, Vice President, purchased 20,200 shares at $17.65 per share, amounting to $356,530, raising holdings to 25,735 shares.

• Also on March 2, 2026, Joshua Peck, Vice President, bought 2,840 shares at $17.59 per share, for $49,955, bringing ownership to 3,140 shares.

• On February 27, 2026, Steven Pluss, Vice President, acquired 15,000 shares at $17.72 per share, valued at $265,800, increasing holdings to 51,500 shares.

• On February 26, 2026, Michael D. Graf, Chief Financial Officer, purchased 1,000 shares at $18.26 per share, for $18,260, resulting in holdings of 7,205 shares.

These transactions, led by Waxman's substantial $5.53 million multi-day buy, occurred during a period of stock weakness (near 52-week lows), with no recent sales reported. The cluster, including multiple VPs and a director, is often interpreted as a positive signal of perceived undervaluation and faith in the company's credit performance and income generation.

Company Financials

Sixth Street Specialty Lending reported Q4 and full-year 2025 results on February 12, 2026. Adjusted net investment income was $0.52 per share (covering base dividend by 113%, with annualized operating ROE ~12%), while adjusted net income was $0.30 per share (below prior-year $0.61 but with solid portfolio metrics). Full-year adjusted Net Investment Income NII was $2.18 per share (12.7% ROE), with economic return of 10.9%, marking a decade of double-digit returns.

The company declared a Q1 2026 base dividend of $0.46 per share (payable March 31) plus a Q4 2025 supplemental $0.01, maintaining high yield (~10% at current prices) despite some analyst concerns over payout ratios and potential cuts amid rate-cut expectations.

The insider cluster, especially Waxman's major buys post-earnings, suggests leadership views the market reaction as excessive, betting on stable income, portfolio quality, and long-term private credit demand. Investors may watch Q1 2026 results (expected May) for deployment updates and dividend confirmation as key catalysts.