MP Materials Form 4: Michael Rosenthal Disposes 150,000 Shares
Rhea-AI Filing Summary
Michael Stuart Rosenthal, Chief Operating Officer of MP Materials Corp. (MP), reported multiple open-market sales totaling 150,000 shares on 08/29/2025. The sales were executed in multiple transactions at weighted-average prices reported as $71.48, $72.56 and $73.23, with per-tranche price ranges disclosed in the filing. Following the transactions, the filing shows 1,284,409 shares held directly and 126,622 shares held indirectly through the Rosenthal Family Trust.
Positive
- None.
Negative
- None.
Insights
TL;DR: COO sold 150,000 MP shares across multiple trades; remaining direct and trust holdings remain substantial.
These Form 4 disclosures reflect routine open-market dispositions rather than option exercises or derivative activity. The total reported disposed amount is 150,000 common shares, sold at weighted-average prices across three reported price bands. Post-transaction direct ownership is shown as 1,284,409 shares, with an additional 126,622 held indirectly via a family trust. From an investor-monitoring perspective, concentrated insider sales can be noteworthy, but this filing does not by itself indicate governance change or derivative-based dilution. The filing includes standard weighted-average price footnotes and offers to provide per-trade breakouts on request.
TL;DR: Disclosure is complete for open-market sales; no indication of plan-based transactions was checked.
The Form 4 indicates the reporting person checked the box for a single reporting person filing and listed officer title as Chief Operating Officer. There is no indication the sales were made pursuant to a Rule 10b5-1 plan in the visible checkboxes. The filing provides the required explanatory footnotes about weighted-average prices and offers to supply detailed per-trade data to the company or SEC staff, which aligns with compliance norms for clarity in insider disposition reporting.
Insider Trade Summary
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock | 83,874 | $71.48 | $6.00M |
| Sale | Common Stock | 52,063 | $72.56 | $3.78M |
| Sale | Common Stock | 14,063 | $73.23 | $1.03M |
| holding | Common Stock | -- | -- | -- |
Footnotes (1)
- The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.07 to $72.06. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.07 to $73.06. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.07 to $73.46. The reporting person undertakes to provide to MP Materials Corp., any security holder of MP Materials Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4.
