X0306 4 2020-05-13 0 0001590955 Paycom Software, Inc. PAYC 0001737656 Evans Jon 7501 W. MEMORIAL ROAD OKLAHOMA CITY OK 73142 0 1 0 0 Chief Operating Officer Common Stock 2020-05-13 4 S 0 200 253.28 D 34462 D Common Stock 2020-05-13 4 S 0 200 256.71 D 34262 D Common Stock 2020-05-13 4 S 0 400 259.43 D 33862 D Common Stock 2020-05-13 4 S 0 400 260.59 D 33462 D Common Stock 2020-05-13 4 S 0 200 262.73 D 33262 D Common Stock 2020-05-14 4 S 0 1600 250.16 D 31662 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 13, 2020. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $252.94 to $253.61, 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 28,326 unvested shares of restricted stock. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $256.57 to $256.84, 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. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $259.17 to $259.77, 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. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $260.19 to $261.03, 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. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $262.35 to $263.11, 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. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $250.00 to $250.49, 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. /s/ Jon D. Evans 2020-05-14