X0306 4 2019-09-10 0001396440 Main Street Capital CORP MAIN 0001437113 Beauvais Jason B 1300 POST OAK BLVD 8TH FLOOR HOUSTON TX 77056 false true false false SVP, GC, CCO, Sec. Common Stock 2019-09-10 5 G false E 100 0 D 112950.0219 D Common Stock 2019-09-11 5 G false E 50 0 D 112900.0219 D Common Stock 2019-09-16 5 J false E 108.8910 43.3 A 113008.9129 D The reporting person transferred these shares as a gift pursuant to a transaction exempt from Section 16(b) under Rule 16b-5. The reporting person acquired these shares under a dividend reinvestment plan, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. /s/ Jason B. Beauvais 2019-09-30