X0306 4 2019-03-01 0 0001590955 Paycom Software, Inc. PAYC 0001738164 Smith Bradley Scott 7501 W. MEMORIAL ROAD OKLAHOMA CITY OK 73142 0 1 0 0 Chief Information Officer Common Stock 31693 D Common Stock 2019-03-01 4 S 0 600 180.4917 D 22994 I By Bradley Scott Smith Revocable Trust, dated October 30, 2017 Common Stock 2019-03-01 4 S 0 1326 181.5029 D 21668 I By Bradley Scott Smith Revocable Trust, dated October 30, 2017 Common Stock 2019-03-01 4 S 0 574 182.3738 D 21094 I By Bradley Scott Smith Revocable Trust, dated October 30, 2017 Common Stock 2019-03-01 4 S 0 100 183.28 D 20994 I By Bradley Scott Smith Revocable Trust, dated October 30, 2017 Includes 26,287 unvested shares of restricted stock. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 24, 2018. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $180.09 to $180.96, 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. The Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust") is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of the Issuer's common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.09 to $182.00, 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 $182.18 to $183.04, 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/ Bradley Scott Smith 2019-03-05