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MR

Michael Stuart Rosenthal

MP
CHIEF OPERATING OFFICER · MP MATERIALS CORP. / DE · CIK 0001832050
FILING MIX · LIFETIME57%/43%
BUYS
21
SELLS
16
TOTAL VALUE
$39.70M
COMPANIES
1
ACTIVE SINCE
Nov 2020
HOLDINGS NOW
136,622
AVG SELL PX
$36.70
TRADE KIND
SHOWING 37 / 37
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
11 backtested trades · 8 horizons · 7 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Michael Stuart Rosenthal, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d11+72.73%-2.02%+1.32%-3.34%-3.59%—
14d11+90.91%+0.45%+3.16%-2.71%-1.52%—
30d11+72.73%+3.02%+4.40%-1.38%-4.25%—
60d11+100.00%+9.93%+8.58%+1.35%+0.29%—
90d11+45.45%-1.45%+6.12%-7.56%-12.99%—
180d11+36.36%-11.80%+9.31%-21.11%-33.73%—
1y11(3 pending)+12.50%+46.16%+27.56%+18.60%-49.31%—
2y11(4 pending)+14.29%-5.89%+44.00%-49.89%-50.83%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
MP · 136,622 shares · as of Jun 9, 2026
0393,441786,8831,180,3241,573,765202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 21 buys / 16 sellsCOVERAGE · 23 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
10,000$54.30$543.0K136,622Jun 9, 2026Jun 10, 2026 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
17,000$56.62$962.5K1,333,673May 20, 2026May 20, 2026 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
9,083$63.82$579.7K1,316,673Jan 13, 2026Jan 14, 2026 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
18,318——1,302,727Jan 12, 2026Jan 14, 2026 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
10,619$65.34$693.8K1,325,756Jan 12, 2026Jan 14, 2026 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
33,648——1,336,375Jan 12, 2026Jan 14, 2026 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
14,063$73.23$1.03M1,284,409Aug 29, 2025Aug 29, 2025 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
52,063$72.56$3.78M1,298,472Aug 29, 2025Aug 29, 2025 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
83,874$71.48$6.00M1,350,535Aug 29, 2025Aug 29, 2025 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
384$26.83$10.3K1,434,409Mar 16, 2025Mar 18, 2025 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
47,363——1,434,793Jan 13, 2025Jan 14, 2025 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
2,560$19.53$50.0K1,387,430Jan 13, 2025Jan 14, 2025 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
10,601$19.75$209.4K1,389,990Jan 12, 2025Jan 14, 2025 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
169,078——1,400,591Dec 10, 2024Dec 11, 2024 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
171,462$18.28$3.13M1,231,513Nov 17, 2024Nov 18, 2024 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
30,000$10.84$325.2K1,402,975Aug 6, 2024Aug 8, 2024 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
171,462$16.55$2.84M1,372,975Feb 17, 2024Feb 20, 2024 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
77,158——1,544,437Jan 12, 2024Jan 16, 2024 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
5,000$20.69$103.5K126,622May 31, 2023May 31, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
6,000$21.14$126.8K121,622May 30, 2023May 31, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
7,000$21.63$151.4K115,622May 26, 2023May 31, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
5,000$22.22$111.1K39,476May 25, 2023May 25, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
5,000$22.03$110.2K34,476May 23, 2023May 23, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
5,000$21.78$108.9K29,476May 22, 2023May 22, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
10,000$21.21$212.1K24,476May 19, 2023May 22, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASE
Chief Operating Officer
354,705——1,467,279May 18, 2023May 18, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
345$27.62$9.5K1,112,574Mar 16, 2023Mar 17, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
154,116$32.69$5.04M1,112,919Feb 17, 2023Feb 17, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
18,625——1,267,035Jan 13, 2023Jan 17, 2023 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
362$43.95$15.9K1,248,410Mar 16, 2022Mar 17, 2022 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
322,918$41.60$13.43M1,248,772Feb 17, 2022Feb 18, 2022 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
6,000——1,573,765Jan 14, 2022Jan 18, 2022 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
2,075$46.83$97.2K1,571,690Jan 14, 2022Jan 18, 2022 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
2,794——1,568,594Mar 15, 2021Mar 17, 2021 ↗View →
MP
MP MATERIALS CORP. / DE
SALE
Chief Operating Officer
829$45.98$38.1K1,567,765Mar 15, 2021Mar 17, 2021 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
2,794——1,565,800Mar 15, 2021Mar 17, 2021 ↗View →
MP
MP MATERIALS CORP. / DE
PURCHASEGRANT
Stock grant
1,563,006——1,563,006Nov 17, 2020Nov 19, 2020 ↗View →
Other insiders · MP
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About this filer
CIK 0001832050
ROLE
Chief Operating Officer
PRIMARY
MP
COMPANIES
1
ACTIVE SINCE
Nov 2020
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