X0306 4 2019-07-23 0000028412 COMERICA INC /NEW/ CMA 0001520421 Smith Barbara 1717 MAIN STREET MC 6404 DALLAS TX 75201 1 0 0 0 Common Stock 2019-07-23 4 A 0 1475 0 A 3983 D Restricted stock units granted pursuant to the 2015 Comerica Incorporated Incentive Plan for Non-Employee Directors. Each restricted stock unit represents an unfunded, unsecured right to receive one share of Comerica common stock. The restricted stock units vest 50% on the first anniversary of the date of grant, 25% on the second anniversary of the date of grant and 25% on the third anniversary of the date of grant. Vested awards generally settle one year from the date the director leaves the Board Includes stock units held pursuant to a deferred compensation plan and restricted stock units as of July 23, 2019. /s/ Jennifer S. Perry, on behalf of Barbara R. Smith through Power of Attorney 2019-07-25