X0306 4/A 2016-11-04 2016-11-07 0 0001590955 Paycom Software, Inc. PAYC 0001594487 Richison Chad R. 7501 W. MEMORIAL ROAD OKLAHOMA CITY OK 73142 1 1 1 0 See Remarks Common Stock 2016-11-04 4 P 0 5750 43.2093 A 4030670 D The reporting person is filing this amendment to correct an error with respect to the amount of securities acquired, which in turn resulted in an error in the amount of securities beneficially owned following the reported transaction. The price reported is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $42.49 to $43.90, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth in this footnote. Includes 529,055 restricted shares of common stock. President and Chief Executive Officer /s/ Chad R. Richison 2016-11-10