| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 10/02/2023 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 889.553 | $0.00 | $0 | | 10/02/2023 |
| 08/14/2023 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 993.747 | $0.00 | $0 | | 08/14/2023 |
| 07/03/2023 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 808.586 | $0.00 | $0 | | 07/03/2023 |
| 05/15/2023 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 982.415 | $0.00 | $0 | | 05/15/2023 |
| 04/03/2023 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 790.684 | $0.00 | $0 | | 04/03/2023 |
| 01/03/2023 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 844.076 | $0.00 | $0 | | 01/03/2023 |
| 11/22/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 902.523 | $0.00 | $0 | | 11/22/2022 |
| 10/03/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 905.797 | $0.00 | $0 | | 10/03/2022 |
| 08/12/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 821.927 | $0.00 | $0 | | 08/12/2022 |
| 07/01/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 927.175 | $0.00 | $0 | | 07/01/2022 |
| 05/13/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 823.222 | $0.00 | $0 | | 05/13/2022 |
| 04/01/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 822.861 | $0.00 | $0 | | 04/01/2022 |
| 02/14/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 733.285 | $0.00 | $0 | | 02/14/2022 |
| 01/03/2022 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 918.811 | $0.00 | $0 | | 01/03/2022 |
| 11/19/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 1.4k | $0.00 | $0 | | 11/19/2021 |
| 10/01/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 950.242 | $0.00 | $0 | | 10/01/2021 |
| 08/13/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 743.074 | $0.00 | $0 | | 08/13/2021 |
| 07/01/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 921.582 | $0.00 | $0 | | 07/01/2021 |
| 05/14/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 691.976 | $0.00 | $0 | | 05/14/2021 |
| 04/01/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 1.1k | $0.00 | $0 | | 04/01/2021 |
| 02/12/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 756.16 | $0.00 | $0 | | 02/12/2021 |
| 01/04/2021 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 1.3k | $0.00 | $0 | | 01/04/2021 |
| 11/13/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 862.103 | $0.00 | $0 | | 11/13/2020 |
| 10/01/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 1.8k | $0.00 | $0 | | 10/01/2020 |
| 08/14/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 778.644 | $0.00 | $0 | | 08/14/2020 |
| 07/01/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 1.6k | $0.00 | $0 | | 07/01/2020 |
| 05/15/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 759.687 | $0.00 | $0 | | 05/15/2020 |
| 04/01/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 2.4k | $0.00 | $0 | | 04/01/2020 |
| 02/14/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 490.94 | $0.00 | $0 | | 02/14/2020 |
| 01/02/2020 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 1.1k | $0.00 | $0 | | 01/02/2020 |
| 11/14/2019 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 452.39 | $0.00 | $0 | | 11/14/2019 |
| 10/01/2019 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 975.523 | $0.00 | $0 | | 10/01/2019 |
| 08/14/2019 | MPLX LP | MPLX | Grant | Common Units (Limited Partner Interests) | 360.529 | $0.00 | $0 | | 08/14/2019 |
| 08/09/2019 | MPLX LP | MPLX | Purchase | Common Units (Limited Partner Interests) | 18.8k | $27.30 | $513.3k | By Revocable Trust | 08/09/2019 |
| 08/07/2019 | MPLX LP | MPLX | Purchase | Common Units (Limited Partner Interests) | 18k | $27.15 | $488.6k | By Revocable Trust | 08/07/2019 |
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