X0306 4 2013-05-06 0 0000277948 CSX CORP CSX 0001237371 MUNOZ OSCAR 500 WATER STREET JACKSONVILLE FL 32202 0 1 0 0 Executive Vice President & COO Common Stock 2013-05-06 4 F 0 7760 25.23 D 631885 D Common Stock 2013-05-07 4 A 0 21349 A 653234 D Withholding of stock to satisfy tax withholding obligation. Restricted stock units awarded pursuant to the approved 2010 CSX Stock and Incentive Award Plan. Each unit represents a contingent right to receive one share of common stock. The units vest on May 6, 2016. In determining the number of units to be granted under the 2010 CSX Stock and Incentive Plan, the value of the award for the Reporting Person is divided by the average of CSX's stock price for the full three-month period preceding the date of grant. By: Mark D. Austin, Attorney-in-Fact 2013-05-08