Main Street Capital Corporation is offering direct unsecured senior notes under a preliminary prospectus supplement subject to completion. The notes would rank pari passu with existing general unsecured and senior unsecured debt, senior to future debt expressly subordinated to them, effectively subordinated to secured debt to the value of collateral, and structurally subordinated to subsidiary liabilities. Holders may require repurchase at 100% of principal plus accrued and unpaid interest after a Change of Control Repurchase Event. Main Street intends initially to use net proceeds to repay outstanding indebtedness, including Credit Facilities; through re-borrowing, it also intends to fund investments, operating expenses, other cash obligations and general corporate purposes.
Main Street's preliminary third-quarter 2026 estimates include NII of $0.87-$0.91 per share, distributable net investment income of $0.94-$0.98 per share and distributable net investment income before taxes of $0.96-$1.00 per share. Estimated NAV was $34.18-$34.26 per share as of September 30, 2026, an increase of $0.26-$0.34 per share from $33.92 per share as of June 30, 2026, after the impact of a $0.30-per-share supplemental dividend paid in September 2026. Management also estimated annualized return on equity above 14%. These estimates are subject to quarter-end closing and review, are unaudited, and actual results may differ materially.
Main Street Capital CORP (MAIN) officer Ryan McHugh, VP, CAO & Assistant Treasurer, acquired common shares through a dividend reinvestment plan. On September 15, 2026, he acquired approximately 39 and 45 shares at $56.37 per share; on September 28, 2026, he acquired approximately 45 and 52 shares at $55.10 per share. The transactions were exempt from Section 16 under Rule 16a-11.
Main Street Capital Corp. director Dunia A. Shive reported two direct common-stock acquisitions through a dividend reinvestment plan: 118 shares on September 28, 2026, at $55.0700 per share and 101 shares on September 15, 2026, at $56.5400 per share. The transactions are described as exempt from Section 16 under Rule 16a-11; no Rule 10b5-1 plan is reported.
Main Street Capital (MAIN) President, CIO and SMD David L. Magdol directly acquired 70.7450 shares of common stock at $55.1000 per share on September 28, 2026, and 63.8786 shares at $56.3100 plus 60.7980 shares at $56.3700 on September 15, 2026. The acquisitions were made under a dividend reinvestment plan; no Rule 10b5-1 plan is reported.
Main Street Capital Corp (MAIN) director Stephen B. Solcher reported acquiring approximately 227 shares of common stock on September 28, 2026, at $55.07 per share, and approximately 194 shares on September 15, 2026, at $56.54 per share. Both transactions were made under a dividend reinvestment plan and described as exempt from Section 16 under Rule 16a-11.
Main Street Capital CORP director Brian E. Lane reported acquiring common shares through a dividend reinvestment plan. On September 15, 2026, he acquired 68 shares at $56.3700 per share and 180 shares at $56.5400; on September 28, 2026, he acquired 79 shares at $55.1000 and 210 shares at $55.0700. The transactions were described as dividend reinvestment transactions exempt from Section 16 under Rule 16a-11. No Rule 10b5-1 plan is reported.
Main Street Capital director John Earl Jackson reported five common-stock acquisitions through a dividend reinvestment plan, exempt from Section 16 under Rule 16a-11. On September 15, 2026, he directly acquired 93 shares at $56.37 and 236 shares at $56.54. His wife acquired 9 shares indirectly at $56.24; her reported position after that transaction was 2,064 shares. On September 28, 2026, Jackson directly acquired 108 shares at $55.10 and 275 shares at $55.07. No Rule 10b5-1 plan is reported.
Jon Kevin Griffin, a director of Main Street Capital CORP (MAIN), acquired common shares through a dividend reinvestment plan: 21.1230 shares at $56.3700 per share and 241.7030 shares at $56.5400 per share on September 15, 2026, followed by 24.5790 shares at $55.1000 per share and 282.2460 shares at $55.0700 per share on September 28, 2026. The transactions are described as exempt from Section 16 under Rule 16a-11.
Main Street Capital CORP reports that CEO, SMD and director Dwayne L. Hyzak acquired 499 shares on September 28, 2026, at $55.10 per share, and 429 shares on September 15, 2026, at $56.37 per share. Both acquisitions were made under a dividend reinvestment plan and are described as exempt from Section 16 under Rule 16a-11.
Main Street Capital Corp. director Vincent D. Foster reported common-stock acquisitions under a dividend reinvestment plan on September 15 and September 28, 2026, at $56.3700 and $55.1000 per share, respectively. Direct entries include 1,114 shares on September 15 and 1,297 shares on September 28; other entries name family trusts MS Trust I, MS Trust II and MS Trust III.