Transaction Details

Footnotes

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") acquired by the reporting person upon the vesting of performance-based restricted stock units granted to the reporting person on February 21, 2025, under the Paycom Software, Inc. 2023 Long-Term Incentive Plan. | Includes 28,766 unvested restricted stock units. | Represents shares of common stock of the Issuer withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the performance-based restricted stock units described in footnote (1) above. No shares were sold in this transaction. | Represents shares of common stock owned by the Faye Penelope Richison 2023 Irrevocable Trust (the "FPR Trust"). The reporting person is the settlor and sole trustee for the FPR Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the FPR Trust. | Represents shares of common stock owned by the Rome West Pedersen 2023 Irrevocable Trust (the "RWP Trust"). The reporting person is the settlor and sole trustee for the RWP Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the RWP Trust. | Represents shares of common stock owned by the Lane West Richison 2022 Irrevocable Trust (the "LWR Trust"). The reporting person is the settlor and sole trustee for the LWR Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the LWR Trust. | Represents shares of common stock owned by the Kase Gabriel Richison 2022 Irrevocable Trust (the "KGR Trust"). The reporting person is the settlor and sole trustee for the KGR Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the KGR Trust. | Represents shares of common stock owned by the Sage Elizabeth Richison 2022 Irrevocable Trust (the "SER Trust"). The reporting person is the settlor and sole trustee for the SER Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the SER Trust. | Represents shares of common stock owned by the Charles Banks Pedersen 2022 Irrevocable Trust (the "CBP Trust"). The reporting person is the settlor and sole trustee for the CBP Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the CBP Trust. | Represents shares of common stock owned by the Ava L. Richison 2012 Irrevocable Trust (the "ALR Trust"). The reporting person is the settlor and sole trustee for the ALR Trust, which is for the benefit of the reporting person's child. The reporting person may be deemed to beneficially own the shares of common stock owned by the ALR Trust. | Represents shares of common stock owned by the Ian D. Richison 2012 Irrevocable Trust (the "IDR Trust"). The reporting person is the settlor and sole trustee for the IDR Trust, which is for the benefit of the reporting person's child. The reporting person may be deemed to beneficially own the shares of common stock owned by the IDR Trust. | Represents shares of common stock owned by the Abrie R. Richison 2012 Irrevocable Trust (the "ARR Trust"). The reporting person is the settlor and sole trustee for the ARR Trust, which is for the benefit of the reporting person's child. The reporting person may be deemed to beneficially own the shares of common stock owned by the ARR Trust. | Represents shares of common stock owned by the Charis Michelle Richison Trust (the "Spouse Trust"). The Spouse Trust is a revocable trust for the benefit of the reporting person's spouse. The reporting person may be deemed to beneficially own the shares of common stock owned by the Spouse Trust. | Represents shares of common stock owned by Ernest Group, Inc. ("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.