Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from: to 1300 Post Oak Boulevard, 8 Floor Maryland (State or other jurisdiction o ...

Main Street Capital (NYSE:MAIN) Q1 2019 Results Earnings Conference Call May 10, 2019 10:00 AM ET Company Participants Zach Vaughan - Investor Relations Dwayne Hyzak - Chief Executive Officer David Magdol - President and Chief Investment Officer Brent Smith - Chief Financial Officer Conference Call Participants Leslie Vandegrift - Raymond James Tim Hayes - B. Riley FBR Operator Greetings, and welcome to the Main Street Capital Corporation First Quarter 2019 Earnings Conference Call. [Operator Instructions] ...

Washington, D.C. 20549 FORM 10-Q Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from: to Commission File Number: 001-33723 Main Street Capital Corporation (Exac ...

Main Street Capital (NYSE:MAIN) Q4 2018 Earnings Conference Call March 1, 2019 10:00 AM ET Company Participants Mark Roberson - Assistant Vice President, Investor Relations Dwayne Hyzak - Chief Executive Officer David Magdol - President and Chief Investment Officer Brent Smith - Chief Financial Officer and Treasurer Conference Call Participants Robert Dodd - Raymond James Tim Hayes - B. Riley FBR Christopher Testa - National Securities Corporation Operator Greetings, and welcome to the Main Street Capital C ...

Use these links to rapidly review the document TABLE OF CONTENTS Item 8. Consolidated Financial Statements and Supplementary Data PART IV Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Comm ...