X0306 4 2020-12-01 0 0001676479 CapStar Financial Holdings, Inc. CSTR 0001685110 Turner James S. Jr. 1201 DEMONBREUN STREET, SUITE 700 NASHVILLE TN 37203 1 0 0 0 Common Stock 2020-12-01 4 S 0 2500 12.05 D 263048 D Common Stock 2345 D Common Stock 1262 D Common Stock 337 D Common Stock 127007 I James S. Turner Common Stock 127007 I Judith P. Turner Common Stock 75643 I Family Private Trust LLC TTEE The Katherine Rose Turner 1997 Grandchilds Trust Common Stock 75643 I Family Private Trust LLC TTEE The James Stephen Turner III 2000 Grandchilds Trust The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 1, 2020. The sales reported in this Form 4 were sold in multiple transactions all at $12.05 per share. The reporting person undertakes to provide to CapStar Financial Holdings, Inc., any security holder of CapStar Financial Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction being reported on this Form 4. The reported item represents an award of restricted stock which vests in three approximately equal installments beginning on the first anniversary of the March 4, 2020 grant date. The reported item represents an award of restricted stock which vests in three equal installments beginning on the first anniversary of the March 6, 2019 grant date. As of the date of this report, 631 shares have vested. The remaining 1,262 shares of restricted stock under this award vest in equal installments on the second and third anniversaries of the grant date, or March 6, 2021 and March 6, 2022, respectively. 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. As of the date of this report, 673 shares of restricted stock have vested. The remaining 337 shares of restricted stock under this award vest on the third anniversary of the grant date, or March 6, 2021. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. /s/ Wes Scott, as Attorney-in-Fact for James S. Turner, Jr. 2020-12-02