3 MP Materials Corp. / DE insiders buy within 14 days
DE
- $3,353,605.68[1]
Three MP Materials Corp. / DE (MP) insiders bought stock within 14 days, Form 4 filings show: 3 purchases totaling $3,353,605.68 on Nov 10. The largest was Randall J. Weisenburger, director, at $1,980,000.[1]
| Insider | Role | Trade date | Shares | Value | Reporting delay |
|---|---|---|---|---|---|
| Randall J. Weisenburger | director | 2026-11-10 | 55,000 | $1,980,000 | 2 days |
| Michael Stuart Rosenthal | chief operating officer | 2026-11-10 | 32,000 | $1,175,090 | 2 days |
| Ryan Corbett | chief financial officer | 2026-11-10 | 5,476 | $198,515.68 | 2 days |
Who bought and when?
All 3 purchases were made on Nov 10. Randall J. Weisenburger made the largest purchase, $1,980,000.[1]
How unusual is the group?
0 further insiders filed a purchase at MP in the 14 days before the earliest trade in this group.[2]
What do these filings not show?
Each Form 4 reports one insider. Together they do not show why anyone bought or whether the group acted together.[1]
MP insider trading activity
In open-market trades dated in the last 90 days, 3 insiders bought $3.4M and no insider sold, per Form 4 filings.
- Randall J. Weisenburger (Director) bought 55,000 shares for $2M, last filed Nov 12.
- Michael Stuart Rosenthal (Chief Operating Officer) bought 32,000 shares for $1.2M, last filed Nov 12.
- Ryan Corbett (Chief Financial Officer) bought 5,476 shares for $199K, last filed Nov 12.
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MP 13F fund activity
In 13F filings received so far for the quarter ended Sep 30, 2026, 1 fund we track made a large change in MP: none opened or grew a position by half or more, and 1 cut one by half or more.
- Jpmorgan Chase & Co cut 2,232,008 shares.
