X0306 4 2021-03-01 0 0000893949 MEDNAX, INC. MD 0001208541 ORDAN MARK S 1301 CONCORD TERRACE SUNRISE FL 33323 1 1 0 0 Chief Executive Officer Common Stock 2021-03-01 4 A 0 71429 0.00 A 136996 D Common Stock 2021-03-01 4 A 0 71429 0.00 A 208425 D Restricted shares granted pursuant to the Issuer's Amended and Restated 2008 Incentive Compensation Plan (the "Plan"), in connection with an annual equity award. The number of shares being reported represents the "target" number of restricted shares and does not include the right of the reporting person to receive up to 35,715 additional shares based on the achievement of certain performance-based criteria for the twelve months ending December 31, 2021. The actual number of shares earned could be less than or greater than the target number, depending on the level of performance achieved, and all of the restricted shares granted are subject to forfeiture if minimum levels of performance are not met. Any restricted shares earned will not vest any earlier than in three installments of twenty-five percent (25%) on March 1, 2022, twenty-five percent (25%) on March 1, 2023 and fifty percent (50%) on March 1, 2024, subject to the terms of the Plan. Restricted shares granted pursuant to the Issuer's Plan, in connection with an annual equity award. Twenty-five percent (25%) of the restricted shares will vest on March 1, 2022, twenty-five percent (25%) of the restricted shares will vest on March 1, 2023 and fifty percent (50%) of the restricted shares will vest on March 1, 2024. /s/ Dominic J. Andreano, Attorney-in-Fact 2021-03-03