X0306 4 2015-06-01 0 0000893949 MEDNAX, INC. MD 0001218834 CALABRO JOSEPH M 1301 CONCORD TERRACE SUNRISE FL 33323 0 1 0 0 President and COO Common Stock 2015-06-01 4 A 0 53412 0.00 A 306797 D Common Stock 2015-06-01 4 S 0 37918 70.4794 D 268879 D Common Stock 2015-06-03 4 S 0 70153 70.5199 D 198726 D Common Stock 8 I By Spouse Restricted shares granted pursuant to the Issuer's Amended and Restated 2008 Incentive Compensation Plan, as amended, in connection with annual equity award. The vesting of the restricted shares is subject to performance based criteria but will not vest any earlier than in three equal installments on June 1, 2016, June 1, 2017 and June 1, 2018. Sales of shares made pursuant to Reporting Person's 105b-1 trading plan. Sales made in ninety (90) separate transactions with prices ranging from $70.03 to $71.03 for a weighted average sales price of $70.4794. Sales of shares were made in eighty (80) separate transactions with prices ranging from $70.01 to $70.88 for a weighted average sales price of $70.5199. Dominic J. Andreano, Attorney-in-Fact 2015-06-03