X0306 4 2021-11-07 0 0000892537 MANTECH INTERNATIONAL CORP MANT 0001337629 Phillips Kevin M 2251 CORPORATE PARK DRIVE HERNDON VA 20171 1 1 0 0 Chairman of the Board & CEO Class A Common Stock 2021-11-07 4 M 0 13394 A 118924 D Class A Common Stock 2021-11-07 4 F 0 6041 81.57 D 112883 D Class A Common Stock 542 I By the ManTech Employee Stock Ownership Plan Restricted Stock Units 2021-11-07 4 M 0 13394 0.00 D Class A Common Stock 13394 0 D Restricted stock units convert into common stock on a one-for-one basis. On November 7, 2016, the reporting person was granted 26,788 RSUs, vesting half on the fourth anniversary of the grant date and the remaining half on the fifth anniversary of the grant date. /s/ Michael R. Putnam, by Power of Attorney 2021-11-09