Main Street Capital Adds Sales Agents to ATM Equity Program

What Happened

• On August 11, 2026, Main Street Capital Corporation announced new equity distribution agreements with Academy Securities, Inc. and SMBC Nikko Securities America, Inc., adding them as Sales Agents to its existing "at-the-market" (ATM) equity offering. At the same time Main Street and B. Riley Securities, Inc. agreed to terminate the prior equity distribution agreement with B. Riley effective August 11, 2026.
• Under the Equity Distribution Agreements, Main Street may, but is not obligated to, issue and sell up to 20,000,000 shares of its common stock (par value $0.01 per share) from time to time through the Sales Agents or to them as principal. The new agreements are on substantially the same terms as prior agreements referenced in Main Street’s Form 8-Ks filed March 5, 2025 and November 12, 2025.

Key Details

• Date of change: August 11, 2026 (agreements entered and B. Riley termination effective).
• New Sales Agents: Academy Securities, Inc. and SMBC Nikko Securities America, Inc.
• Shares available under ATM program: up to 20,000,000 shares of common stock (par $0.01).
• Existing Sales Agents referenced: Truist Securities, RBC Capital Markets, Raymond James, Huntington (plus the newly added agents).

Why It Matters

• For investors, adding two sales agents expands Main Street’s distribution network and gives the company more flexibility to raise capital opportunistically through its ATM program. That could increase liquidity for the stock and allow the company to access equity financing when management chooses.
• The filing does not obligate Main Street to sell shares; any share issuance would be dilutive to existing shareholders if and when shares are sold under the program. The termination of B. Riley simply removes one intermediary while the overall agent group is broadened.