X0306 4 2022-04-21 0 0001370880 Mandiant, Inc. MNDT 0001140541 MEDINA JAMES C/O MANDIANT, INC. 11951 FREEDOM DRIVE, 6TH FLOOR RESTON VA 20190 0 1 0 0 SVP, Finance, CC & CAO Common Stock 2022-04-21 4 A 0 150 0.00 D 124713 D Represents shares underlying restricted stock units ("RSUs"). The RSUs will vest in full on May 15, 2022, subject to the Reporting Person's continued service through such date. Richard Meamber, Attorney-in-Fact 2022-04-22