MP's three largest insider shareholders as of April 25, 2026 are James H. Litinsky (Chairman And Ceo, 28.17Mn shares), James H. Litinsky (Chairman And Ceo, 16.03Mn shares), Daniel Allen Gold (Director, 13.50Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| James H. Litinsky | Chairman And Ceo | 0 | 28,174,847 | 09 Sep, 2022 |
| James H. Litinsky | Chairman And Ceo | 0 | 16,026,990 | 20 Sep, 2021 |
| Daniel Allen Gold | - | 0 | 13,501,578 | 15 Dec, 2022 |
| James H. Litinsky | Chairman And Ceo | 0 | 12,505,965 | 20 Apr, 2026 |
| Daniel Allen Gold | - | 0 | 5,584,566 | 15 Dec, 2022 |
| Michael Stuart Rosenthal | Chief Operating Officer | 1,316,673 | 0 | 14 Jan, 2026 |
| Michael Stuart Rosenthal | Chief Operating Officer | 1,316,673 | 0 | 14 Jan, 2026 |
| Michael Stuart Rosenthal | Chief Operating Officer | 1,267,035 | 0 | 17 Jan, 2023 |
| Michael Stuart Rosenthal | Chief Operating Officer | 1,267,035 | 0 | 17 Jan, 2023 |
| James H. Litinsky | Chairman And Ceo | 621,993 | 0 | 17 Jan, 2023 |
| Andrew A. Mcknight | - | 385,638 | 0 | 27 May, 2022 |
| Andrew A. Mcknight | - | 385,638 | 0 | 27 May, 2022 |
| Ryan Corbett | Chief Financial Officer | 225,997 | 0 | 17 Jan, 2023 |
| James H. Litinsky | Chairman And Ceo | 216,397 | 0 | 13 Jan, 2026 |
| Randall J Weisenburger | - | 146,901 | 0 | 17 Jun, 2022 |
| Randall J Weisenburger | - | 146,901 | 0 | 17 Jun, 2022 |
| Ryan Corbett | Chief Financial Officer | 129,017 | 0 | 17 Mar, 2026 |
| Michael Stuart Rosenthal | Chief Operating Officer | 0 | 126,622 | 31 May, 2023 |
| Michael Stuart Rosenthal | Chief Operating Officer | 0 | 126,622 | 31 May, 2023 |
| Randall J Weisenburger | - | 116,901 | 0 | 07 Mar, 2022 |
| Randall J Weisenburger | - | 116,901 | 0 | 07 Mar, 2022 |
| Elliot Dean Hoops | General Counsel And Secretary | 49,922 | 21,320 | 20 Jan, 2023 |
| Elliot Dean Hoops | General Counsel And Secretary | 61,053 | 0 | 17 Mar, 2026 |
| David Gregory Infuso | Chief Accounting Officer | 48,442 | 0 | 01 Apr, 2026 |
| Connie K Duckworth | - | 37,152 | 0 | 01 Apr, 2026 |
| Connie K Duckworth | - | 19,867 | 0 | 03 Jan, 2023 |
| Maryanne Lavan | - | 19,755 | 0 | 02 Jan, 2026 |
| Maryanne Lavan | - | 4,230 | 0 | 03 Jan, 2023 |
| Richard B Myers | - | 3,794 | 0 | 03 Jan, 2023 |
| Richard B Myers | - | 3,794 | 0 | 03 Jan, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 17 Apr, 2026 | James H. Litinsky | Common Stock | D | 40,821 | $64.05 | 12,765,144 | I | S |
| 20 Apr, 2026 | James H. Litinsky | Common Stock | D | 259,179 | $64.03 | 12,505,965 | I | S |
| 01 Apr, 2026 | David Gregory Infuso | Common Stock | D | 804 | $48.41 | 48,442 | D | F |
| 31 Mar, 2026 | Connie K Duckworth | Common Stock | A | 725 | $0.00 | 37,152 | D | A |
| 17 Mar, 2026 | Ryan Corbett | Common Stock | D | 46,000 | $60.00 | 129,017 | D | S |
| 16 Mar, 2026 | Elliot Dean Hoops | Common Stock | D | 13,914 | $60.01 | 61,053 | D | S |
| 22 Jan, 2026 | David Gregory Infuso | Common Stock | D | 1,198 | $68.37 | 49,246 | D | F |
| 20 Jan, 2026 | Elliot Dean Hoops | Common Stock | D | 7,823 | $68.21 | 74,967 | D | S |
| 12 Jan, 2026 | Ryan Corbett | Common Stock | A | 16,573 | $0.00 | 173,239 | D | A |
| 12 Jan, 2026 | Michael Stuart Rosenthal | Common Stock | A | 18,318 | $0.00 | 1,302,727 | D | A |
| 12 Jan, 2026 | David Gregory Infuso | Common Stock | A | 3,894 | $0.00 | 51,988 | D | A |
| 12 Jan, 2026 | Michael Stuart Rosenthal | Common Stock | A | 18,318 | $0.00 | 1,302,727 | D | A |
| 12 Jan, 2026 | Elliot Dean Hoops | Common Stock | A | 8,722 | $0.00 | 78,471 | D | A |
| 12 Jan, 2026 | Michael Stuart Rosenthal | Common Stock | A | 33,648 | $0.00 | 1,336,375 | D | A |
| 12 Jan, 2026 | David Gregory Infuso | Common Stock | A | 1,301 | $0.00 | 53,289 | D | A |
| 12 Jan, 2026 | Elliot Dean Hoops | Common Stock | A | 22,942 | $0.00 | 101,413 | D | A |
| 12 Jan, 2026 | Michael Stuart Rosenthal | Common Stock | A | 33,648 | $0.00 | 1,336,375 | D | A |
| 12 Jan, 2026 | Ryan Corbett | Common Stock | A | 30,590 | $0.00 | 203,829 | D | A |
| 12 Jan, 2026 | Ryan Corbett | Common Stock | D | 12,038 | $65.34 | 191,791 | D | F |
| 12 Jan, 2026 | Michael Stuart Rosenthal | Common Stock | D | 10,619 | $65.34 | 1,325,756 | D | F |