PAYC

SEC source: 0000950170-24-068185 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,653,057

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 $144.05 to $145.04, 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.

F4 · 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 11

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,408

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. on February 16, 2024.

SEC source: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 10

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,454

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. on February 16, 2024.

F12 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $153.95 to $153.97 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 9

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,467

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. on February 16, 2024.

F11 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $152.92 to $153.23 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 8

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,483

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. on February 16, 2024.

F10 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $151.35 to $151.78 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 7

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,580

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. on February 16, 2024.

F9 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $150.36 to $151.34 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,822

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. on February 16, 2024.

F8 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $149.41 to $150.15, 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,926

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. 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 $148.49 to $149.24, 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,074,978

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. 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 $146.91 to $147.89, 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,075,045

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. 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 $146.05 to $146.73, 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: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,075,318

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. 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 $145.05 to $146.04, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-068166 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,075,966

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. 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 $144.05 to $145.04, 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: 0000950170-24-067558 · ownership.xml · nonDerivative · entry 2

Peck Randall · CIK 0002025321 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,856

F2 · shares: Represents restricted stock units granted under the LTIP.

F3 · balance_after: Includes 40,149 unvested shares of restricted stock and 5,243 unvested restricted stock units.

SEC source: 0000950170-24-067558 · ownership.xml · nonDerivative · entry 1

Peck Randall · CIK 0002025321 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,613

F1 · shares: Represents shares of restricted stock granted under the Paycom Software, Inc. 2023 Long-Term Incentive Plan (the "LTIP").

SEC source: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 14

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,653,449

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.

F9 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $161.85 to $162.80 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.

F10 · 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 13

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,653,481

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.

F8 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $161.18 to $161.78, 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.

F10 · 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 12

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,653,602

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 $160.18 to $161.15, 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.

F10 · 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 11

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,654,293

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 $159.19 to $160.16, 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.

F10 · 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 10

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,654,871

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 $158.20 to $159.18, 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.

F10 · 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 9

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,076,358

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.

F9 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $161.85 to $162.80 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 8

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,076,390

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.

F8 · price: The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $161.18 to $161.78, 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 7

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,076,511

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 $160.18 to $161.15, 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,077,202

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 $159.19 to $160.16, 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,077,780

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 $158.20 to $159.18, 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,655,399

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 $165.23 to $165.93, 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.

F10 · 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Ernest Group, Inc.

Disclosed balance after: 3,655,906

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 $164.21 to $165.19, 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.

F10 · 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,078,308

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 $165.23 to $165.93, 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: 0000950170-24-067396 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,078,815

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 $164.21 to $165.19, 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: 0000950170-24-065971 · 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: 3,657,349

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 $169.79 to $170.11, 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 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: 0000950170-24-065971 · 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: 3,657,449

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 $168.73 to $169.68, 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: 0000950170-24-065971 · 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: 3,658,214

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 $167.72 to $168.62, 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: 0000950170-24-065971 · 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: 3,658,864

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 $166.72 to $167.66, 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: 0000950170-24-065971 · 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: 3,080,258

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 $169.79 to $170.11, 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 in the transactions at each separate price within the range set forth in this footnote.

SEC source: 0000950170-24-065971 · 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: 3,080,358

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 $168.73 to $169.68, 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: 0000950170-24-065971 · 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: 3,081,123

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 $167.72 to $168.62, 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: 0000950170-24-065971 · 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: 3,081,773

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 $166.72 to $167.66, 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: 0000950170-24-065231 · ownership.xml · nonDerivative · entry 10

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: 3,659,299

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 $173.74 to $174.34, 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.

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: 0000950170-24-065231 · ownership.xml · nonDerivative · entry 9

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: 3,659,390

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 $171.78 to $172.18, 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.

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: 0000950170-24-065231 · 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: 3,659,412

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 $170.58 to $171.45, 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.

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: 0000950170-24-065231 · 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: 3,660,275

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 $169.57 to $170.56, 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.

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: 0000950170-24-065231 · 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: 3,661,066

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 $168.51 to $169.50, 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: 0000950170-24-065231 · 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: 3,082,208

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 $173.74 to $174.34, 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: 0000950170-24-065231 · 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: 3,082,299

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 $171.78 to $172.18, 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: 0000950170-24-065231 · 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: 3,082,321

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 $170.58 to $171.45, 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: 0000950170-24-065231 · 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: 3,083,184

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 $169.57 to $170.56, 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: 0000950170-24-065231 · 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: 3,083,975

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 $168.51 to $169.50, 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: 0000950170-24-064562 · ownership.xml · nonDerivative · entry 10

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: 3,661,249

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.

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 9

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: 3,661,344

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.

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 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: 3,661,834

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.

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 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: 3,662,519

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.

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.