PAYC

SEC source: 0000950170-24-064562 · ownership.xml · nonDerivative · entry 6

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,662,617

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $175.14 to $175.73, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

F8 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-064562 · ownership.xml · nonDerivative · entry 5

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,084,158

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F7 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $178.46 to $178.78, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-064562 · ownership.xml · nonDerivative · entry 4

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,084,253

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F6 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $177.79 to $178.33, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-064562 · ownership.xml · nonDerivative · entry 3

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,084,743

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F5 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $176.76 to $177.75, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-064562 · ownership.xml · nonDerivative · entry 2

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,085,428

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $175.73 to $176.67, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-064562 · ownership.xml · nonDerivative · entry 1

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,085,526

F1 · date: Under Section 16(b) of the Securities Exchange Act of 1934, as amended, the sale transactions reported herein are matchable with the reporting person's purchase of one share of common stock on December 14, 2023 at a price of $201.86. Because the purchase price exceeded the sale prices for all transactions reported herein, no profit was realized by the reporting person. The reporting person has agreed to voluntarily disgorge to Paycom Software, Inc. (the "Issuer") any profits realized from matchable transactions occurring within less than six months of the previously reported purchase transaction.

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $175.14 to $175.73, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063935 · ownership.xml · nonDerivative · entry 6

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,663,199

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F5 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.96 to $180.89, 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 in the transactions at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063935 · ownership.xml · nonDerivative · entry 5

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,663,868

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.42 to $179.95, 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 in the transactions at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063935 · ownership.xml · nonDerivative · entry 4

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,664,703

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $178.40 to $179.37, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063935 · ownership.xml · nonDerivative · entry 3

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,086,108

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F5 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.96 to $180.89, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063935 · ownership.xml · nonDerivative · entry 2

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,086,777

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.42 to $179.95, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063935 · ownership.xml · nonDerivative · entry 1

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,087,612

F1 · date: Under Section 16(b) of the Securities Exchange Act of 1934, as amended, the sale transactions reported herein are matchable with the reporting person's purchase of one share of common stock on December 14, 2023 at a price of $201.86. Because the purchase price exceeded the sale prices for all transactions reported herein, no profit was realized by the reporting person. The reporting person has agreed to voluntarily disgorge to Paycom Software, Inc. (the "Issuer") any profits realized from matchable transactions occurring within less than six months of the previously reported purchase transaction.

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $178.40 to $179.37, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063555 · ownership.xml · nonDerivative · entry 6

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,665,149

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F5 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.39 to $180.33, 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 in the transactions at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063555 · ownership.xml · nonDerivative · entry 5

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,665,799

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.12 to $179.37, 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 in the transactions at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063555 · ownership.xml · nonDerivative · entry 4

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,666,447

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $178.23 to $179.10, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063555 · ownership.xml · nonDerivative · entry 3

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,088,058

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F5 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.39 to $180.33, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063555 · ownership.xml · nonDerivative · entry 2

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,088,708

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.12 to $179.37, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063555 · ownership.xml · nonDerivative · entry 1

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,089,356

F1 · date: Under Section 16(b) of the Securities Exchange Act of 1934, as amended, the sale transactions reported herein are matchable with the reporting person's purchase of one share of common stock on December 14, 2023 at a price of $201.86. Because the purchase price exceeded the sale prices for all transactions reported herein, no profit was realized by the reporting person. The reporting person has agreed to voluntarily disgorge to Paycom Software, Inc. (the "Issuer") any profits realized from matchable transactions occurring within less than six months of the previously reported purchase transaction.

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $178.23 to $179.10, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 8

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,667,099

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F6 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $181.22 to $182.13, 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 in the transactions at each separate price within the range set forth in this footnote.

F7 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 7

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,667,218

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F5 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $180.52 to $181.22, 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 in the transactions at each separate price within the range set forth in this footnote.

F7 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 6

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,667,579

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.60 to $180.52, 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 in the transactions at each separate price within the range set forth in this footnote.

F7 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 5

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,668,121

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $178.58 to $179.46, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

F7 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 4

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,090,008

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F6 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $181.22 to $182.13, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 3

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,090,127

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F5 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $180.52 to $181.22, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 2

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,090,488

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.60 to $180.52, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063105 · ownership.xml · nonDerivative · entry 1

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,091,030

F1 · date: Under Section 16(b) of the Securities Exchange Act of 1934, as amended, the sale transactions reported herein are matchable with the reporting person's purchase of one share of common stock on December 14, 2023 at a price of $201.86. Because the purchase price exceeded the sale prices for all transactions reported herein, no profit was realized by the reporting person. The reporting person has agreed to voluntarily disgorge to Paycom Software, Inc. (the "Issuer") any profits realized from matchable transactions occurring within less than six months of the previously reported purchase transaction.

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $178.58 to $179.46, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-063470 · ownership.xml · nonDerivative · entry 1

Boelte Craig E. · CIK 0001594519 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 306,731

F1 · balance_after: Includes 9,445 unvested restricted stock units and 33,000 unvested shares of restricted stock.

SEC source: 0000950170-24-062587 · ownership.xml · nonDerivative · entry 4

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,669,049

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $180.63 to $181.29, 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 in the transactions at each separate price within the range set forth in this footnote.

F5 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-062587 · ownership.xml · nonDerivative · entry 3

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,670,452

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.79 to $180.62, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

F5 · ownership.nature: Represents shares of common stock owned by Ernest Group. The reporting person is the sole director of Ernest Group, and Ernest Group is wholly owned by the reporting person and certain trusts for the reporting person's children, for which the reporting person serves as trustee. The reporting person may be deemed to beneficially own the shares of common stock owned by Ernest Group.

SEC source: 0000950170-24-062587 · ownership.xml · nonDerivative · entry 2

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,091,958

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F4 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $180.63 to $181.29, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-062587 · ownership.xml · nonDerivative · entry 1

Richison Chad R. · CIK 0001594487 · Director · Co-CEO, President and Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,093,361

F1 · date: Under Section 16(b) of the Securities Exchange Act of 1934, as amended, the sale transactions reported herein are matchable with the reporting person's purchase of one share of common stock on December 14, 2023 at a price of $201.86. Because the purchase price exceeded the sale prices for all transactions reported herein, no profit was realized by the reporting person. The reporting person has agreed to voluntarily disgorge to Paycom Software, Inc. (the "Issuer") any profits realized from matchable transactions occurring within less than six months of the previously reported purchase transaction.

F2 · kind: The sales reported on this Form 4 were effected pursuant to a joint Rule 10b5-1 trading plan adopted by the reporting person and Ernest Group, Inc. ("Ernest Group") on February 16, 2024.

F3 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $179.79 to $180.62, 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 (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-059649 · ownership.xml · nonDerivative · entry 1

Vickroy Amy · CIK 0002018276 · EVP of Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,343

F1 · shares: Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the following awards: (i) 370 shares of restricted stock granted to the reporting person on January 30, 2020; (ii) 367 shares of restricted stock granted to the reporting person on February 5, 2021; and (iii) 338 shares of restricted stock granted to the reporting person on February 2, 2022. No shares were issued or sold in this transaction.

F2 · balance_after: Includes 9,416 unvested shares of restricted stock.

SEC source: 0000950170-24-059650 · ownership.xml · nonDerivative · entry 1

Thomas Christopher Gene · CIK 0001969157 · Co-Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,377

F1 · shares: Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the following awards: (i) 164 shares of restricted stock granted to the reporting person on January 30, 2020; (ii) 163 shares of restricted stock granted to the reporting person on February 5, 2021; (iii) 150 shares of restricted stock granted to the reporting person on February 2, 2022; and (iv) 208 shares of restricted stock granted to the reporting person on February 4, 2023. No shares were issued or sold in this transaction.

F2 · balance_after: Consists of 25,273 unvested restricted stock units and 20,227 unvested shares of restricted stock.

SEC source: 0000950170-24-057790 · ownership.xml · nonDerivative · entry 1

Smith Bradley Scott · CIK 0001738164 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Bradley Scott Smith Revocable Trust, dated October 30, 2017

Disclosed balance after: 16,293

F1 · ownership.nature: 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 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.

SEC source: 0000950170-24-057789 · ownership.xml · nonDerivative · entry 1

Clark Jason D. · CIK 0001616602 · Chief Administrative Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,273

F1 · shares: Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the following awards: (i) 756 shares of restricted stock granted to the reporting person on May 1, 2023; and (ii) 33 shares of restricted stock granted to the reporting person on May 15, 2023. No shares were issued or sold in this transaction.

F2 · balance_after: Includes 2,714 unvested restricted stock units and 33,000 unvested shares of restricted stock.

SEC source: 0000950170-24-055633 · ownership.xml · nonDerivative · entry 1

Vickroy Amy · CIK 0002018276 · EVP of Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,607

F1 · shares: Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 10,491 unvested shares of restricted stock.

SEC source: 0000950170-24-051458 · ownership.xml · nonDerivative · entry 1

PETERS FREDERICK C II · CIK 0001227984 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,283

F1 · shares: Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 2,005 unvested shares of restricted stock.

SEC source: 0000950170-24-051456 · ownership.xml · nonDerivative · entry 1

DUQUES HENRY C · CIK 0001185120 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,985

F1 · shares: Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 2,005 unvested shares of restricted stock.

SEC source: 0000950170-24-051454 · ownership.xml · nonDerivative · entry 1

LEVENSON ROBERT J · CIK 0001203542 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,061

F1 · shares: Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 2,005 unvested shares of restricted stock.

SEC source: 0000950170-24-051457 · ownership.xml · nonDerivative · entry 1

WATTS J C JR · CIK 0001213577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,080

F1 · shares: Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 2,005 unvested shares of restricted stock.

SEC source: 0000950170-24-051455 · ownership.xml · nonDerivative · entry 1

TURNEY SHAREN J · CIK 0001363500 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,003

F1 · shares: Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 2,005 unvested shares of restricted stock.

SEC source: 0000950170-24-051453 · ownership.xml · nonDerivative · entry 1

Williams Felicia · CIK 0001675737 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,607

F1 · shares: Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 2,005 unvested shares of restricted stock.

SEC source: 0000950170-24-050513 · ownership.xml · nonDerivative · entry 1

Vickroy Amy · CIK 0002018276 · EVP of Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,125

F1 · shares: Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 283 shares of restricted stock granted to the reporting person on April 30, 2023. No shares were issued or sold in this transaction.

F2 · balance_after: Includes 9,009 unvested shares of restricted stock.

SEC source: 0000950170-24-042628 · ownership.xml · nonDerivative · entry 1

Vickroy Amy · CIK 0002018276 · EVP of Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,194

F1 · shares: Represents 3,000 unvested shares of restricted stock granted to the reporting person prior to her appointment as an executive officer, which shares were forfeited on April 4, 2024.

F2 · balance_after: Includes 9,292 unvested shares of restricted stock.

SEC source: 0000950170-24-046004 · ownership.xml · nonDerivative · entry 1

Smith Bradley Scott · CIK 0001738164 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Bradley Scott Smith Revocable Trust, dated October 30, 2017

Disclosed balance after: 19,218

F1 · ownership.nature: 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 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.

SEC source: 0000950170-24-035346 · ownership.xml · nonDerivative · entry 1

Boelte Craig E. · CIK 0001594519 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 307,731

F1 · balance_after: Includes 9,445 unvested restricted stock units and 33,000 unvested shares of restricted stock.

SEC source: 0000950170-24-025894 · ownership.xml · nonDerivative · entry 1

Faurot Holly · CIK 0001855633 · Chief Sales Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,799

F1 · shares: Represents restricted stock units granted under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 5,902 unvested restricted stock units and 33,370 unvested shares of restricted stock.

SEC source: 0000950170-24-025969 · ownership.xml · nonDerivative · entry 1

Smith Bradley Scott · CIK 0001738164 · Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,100

F1 · shares: Represents restricted stock units granted under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 5,902 unvested restricted stock units and 33,000 unvested shares of restricted stock.

SEC source: 0000950170-24-025948 · ownership.xml · nonDerivative · entry 1

Thomas Christopher Gene · CIK 0001969157 · Co-Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,681

F1 · shares: Represents restricted stock units granted under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Consists of 25,273 unvested restricted stock units and 20,912 unvested shares of restricted stock.

SEC source: 0000950170-24-025922 · ownership.xml · nonDerivative · entry 1

Boelte Craig E. · CIK 0001594519 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 308,731

F1 · shares: Represents restricted stock units granted under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

F2 · balance_after: Includes 9,445 unvested restricted stock units and 33,000 unvested shares of restricted stock.