X0306 4 2013-05-30 0000861884 RELIANCE STEEL & ALUMINUM CO RS 0001488432 Koch Stephen Paul 590 N. BETHLEHEM PIKE LOWER GWYNEDD PA 19002 0 1 0 0 Sr. VP, Operations Common Stock 2013-05-30 4 M 0 7500 33.70 A 17500 D Common Stock 2013-05-30 4 M 0 18750 42.81 A 36250 D Common Stock 2013-05-30 4 M 0 12500 55.73 A 48750 D Common Stock 2013-05-30 4 S 0 37750 66.86 D 11000 D Common Stock 1196 I Held by Trustee of Reliance Steel & Aluminum Co. 401(k) Plan Options to Acquire Common Stock 33.70 2013-05-30 4 M 0 7500 0 D 2016-04-27 Common Stock 7500 0 D Options to Acquire Common Stock 42.81 2012-05-30 4 M 0 18750 0 D 2017-02-23 Common Stock 18750 6250 D Options to Acquire Common Stock 55.73 2013-05-30 4 M 0 12500 0 D 2018-02-23 Common Stock 12500 12500 D The price reported represents the weighted average sale price of the shares disposed of. The actual sale prices ranged from $66.53 to $67.09. The Reporting Person has provided to the Issuer and hereby undertakes to provide upon request by the U.S. Securities and Exchange Commssion Staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. Includes 7,000 restricted shares subject to vesting over time. The options vested and became exercisable in four equal annual installments beginning on April 27, 2010, which was the first anniversary of the date on which the options were granted. The options vest and become exercisable in four equal annual installments beginning on February 23, 2011, which was the first anniversary of the date on which the options were granted. The options vest and become exercisable in four equal annual installments beginning on February 23, 2012, which was the first anniversary of the date on which the options were granted. In the aggregate, the Reporting Person beneficially owns 18,750 options to acquire common stock (with various exercise prices and expiration dates). In addition, the Reporting Person beneficially owns 20,000 restricted stock units subject to performance and service criteria (all or a portion shall vest on or before March 15, 2016) as of the date of this report. Stephen Koch by Kay Rustand as his Attorney-in-Fact 2013-05-31