X0303 4 2011-03-24 0 0000072020 NICOR INC GAS 0001205607 DALESSANDRO ROCCO J NICOR INC. 1844 FERRY ROAD NAPERVILLE IL 60563 0 1 0 0 EVP - Nicor Gas Company Restricted Stock Units 2011-03-24 4 A 0 2290 0 A Common Stock 2290 12330 D Each restricted stock unit represents a contingent right to receive one share of Nicor Inc. common stock. Terms and conditions for vesting and delivery of the underlying common stock are specified in a restricted stock unit agreement between Nicor Inc. and reporting person. With certain exceptions for earlier vesting and delivery and subject to the forfeiture provisions contained in that agreement, vesting and delivery will occur on March 24, 2015. Antoinette M. Lambert - Attorney-in-Fact 2011-03-28