X0306 4 2014-02-05 0 0001383871 LIFELOCK, INC. LOCK 0001558604 Cerda Clarissa 60 EAST RIO SALADO PARKWAY, SUITE 400 TEMPE AZ 85281 0 1 0 0 See Remarks Common Stock 2014-02-05 4 M 0 5050 3.00 A 5050 D Common Stock 2014-02-05 4 S 0 5050 20.59 D 0 D Employee Stock Option (Right to Buy) 3.00 2014-02-05 4 M 0 5050 0.00 D 2019-05-15 Common Stock 5050 281800 D The shares were sold pursuant to a 10b5-1 sales plan. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.550 to $20.630, inclusive. The reporting person undertakes to provide to LifeLock, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. 25% of the total number of shares underlying this option vested on January 12, 2010. The remaining shares underlying this option vest at a rate of 1/48 of the total number of shares underlying this option on the twelfth day of each month thereafter for a period of 36 months. Ms. Cerda serves as the Company's Executive Vice President, Chief Legal Officer, and Secretary. /s/ Stephen Palmer, Attorney-in-Fact 2014-02-07