X0306 4 2017-06-19 0 0001590955 Paycom Software, Inc. PAYC 0001636588 Pezold Stacey M 7501 W. MEMORIAL ROAD OKLAHOMA CITY OK 73142 0 1 0 0 Chief Learning Officer Common Stock 2017-06-19 4 S 0 23573 69.9818 D 143574 D Common Stock 2017-06-19 4 S 0 6427 70.7439 D 137147 D Common Stock 1050 I By spouse The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2017. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.425 to $70.41, inclusive. The reporting person undertakes to provide to Paycom Software, Inc. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Includes 70,813 unvested shares of restricted stock. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.47 to $70.98, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Represents shares held in individual retirement accounts for the benefit of the reporting person's spouse. /s/ Stacey Pezold 2017-06-21