Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Information concerning security ownership of certain beneficial owners and management required by this Item is incorporated by reference to “Other Information—Stock Ownership Information” in our Proxy Statement.

Securities Authorized for Issuance Under Equity Compensation Plans

The following table provides information as of December 31, 2023 with respect to shares of our common stock that may be issued under the MPC 2021 Plan, the MPC 2012 Plan and the MPC 2011 Plan:

(a) Includes the following:

1. 1,044,011 stock options granted pursuant to the MPC 2012 Plan and not forfeited, cancelled or expired as of December 31, 2023; and

2. 1,440,759 restricted stock units granted pursuant to the MPC 2021 Plan, the MPC 2012 Plan and the MPC 2011 Plan for shares unissued and not forfeited, cancelled or expired as of December 31, 2023.

(b)Restricted stock, restricted stock units and performance units are not taken into account in the weighted-average exercise price as such awards have no exercise price.

(c)Reflects the shares available for issuance pursuant to the MPC 2021 Plan. All granting authority under the MPC 2012 Plan was revoked following the approval of the MPC 2021 Plan by shareholders on April 28, 2021. All granting authority under the MPC 2011 Plan was revoked following the approval of the MPC 2012 Plan by shareholders on April 25, 2012. Shares that (i) relate to grants made pursuant to the MPC 2012 Plan that are forfeited, cancelled or expire unexercised or (ii) are withheld or tendered to satisfy taxes related to vestings of restricted stock units under the MPC 2012 Plan, in each case, become immediately available for issuance under the MPC 2021 Plan.