X0306 4 2019-02-28 0001228627 REXAHN PHARMACEUTICALS, INC. RNN 0001661400 Nolan Lisa C/O REXAHN PHARMACEUTICALS, INC. 15245 SHADY GROVE ROAD, SUITE 455 ROCKVILLE MD 20850 true Chief Business Officer Common Stock 2019-02-28 4 M 0 1625 0 A 23250 D Restricted Stock Units 2019-02-28 4 M 0 1625 0 D Common Stock 1625 3250 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. On January 20, 2017, the reporting person was granted 6,500 RSUs, of which 1,625 vested on February 28, 2018 and 1,625 vested on February 28, 2019. The remaining RSUs will vest in two equal annual installments on the last business day in February, beginning February 28, 2020. /s/ Douglas J. Swirsky, as attorney-in-fact for Lisa Nolan 2019-03-01