Michael Stuart Rosenthal has bought MP on 3 days since Aug 2024

Michael Stuart Rosenthal is a co-founder and Chief Operating Officer of MP Materials Corp. (NYSE: MP), a U.S.-based rare earth materials company focused on owning and operating the Mountain Pass rare earth mine and processing facility.( As COO, he has overseen operations at Mountain Pass since the company’s acquisition of the asset and is part of MP Materials’ senior leadership team alongside Chairman and CEO James H. Litinsky and CFO Ryan Corbett.( Rosenthal is regarded as a key operational leader in the company’s growth as a vertically integrated rare earths producer.(

Rosenthal is also a significant shareholder in MP Materials, holding over 1.3 million shares directly and additional shares indirectly through the Rosenthal Family Trust, following multiple open‑market transactions disclosed in SEC Form 4 filings.( Recent filings report that he acquired 17,000 MP shares in May 2026, bringing his direct holdings to 1,333,673 shares, with a further 126,622 shares held indirectly.( His stake has been valued in the tens of millions of dollars, and public estimates place his net worth—largely tied to MP Materials equity—at well over $40 million.( As a named executive officer, Rosenthal receives an annual COO salary and has been periodically involved in notable insider transactions, including both open‑market purchases and sales of MP Materials stock.(

Written by Perplexity from public sources.