X0306 4 2018-05-23 0 0001676479 CapStar Financial Holdings, Inc. CSTR 0001369635 THORNBURGH RICHARD E 1201 DEMONBREUN STREET, SUITE 700 NASHVILLE TN 37203 1 0 0 0 Common Stock 2018-05-23 4 X 0 3000 10.00 A 10215 D Common Stock 682 D Common Stock 437 D Common Stock 371 D Option (right to buy) 10.00 2018-05-23 4 X 0 3000 0.00 D 2018-11-13 Common Stock 3000 0 D Option (right to buy) 10.00 2020-01-20 Common Stock 6000 6000 D The reported item represents an award of restricted stock which vests in three approximately equal installments beginning on the first anniversary of the March 6, 2018 grant date. The reported item represents the unvested portion of an award of restricted stock that was granted on February 28, 2017. The remaining 437 shares of restricted stock under this award vest in equal parts on the second and third anniversaries of the grant date or February 28, 2019 and February 28, 2020, respectively. The reported item represents the unvested portion of an award of restricted stock that was granted on March 3, 2016. The remaining 371 shares of restricted stock under this award vest on the third anniversary of the grant date or March 3, 2019. These options vested in four equal annual installments beginning one year after the November 13, 2008, grant date. These options vested in four equal annual installments beginning one year after the January 20, 2010, grant date. /s/ by Rob Anderson, as Attorney-in-Fact for Richard E. Thornburgh 2018-05-25