Michael Stuart Rosenthal

CIK 1832050 · View on SEC EDGAR ↗

Insider

First SEC filing: June 10, 2026 · Latest: June 10, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Compensation Executive pay disclosed in company proxy statements.

Insider at

MP buying June 9, 2026

Insider transactions

1 buys (P) 0 sells (S) Net: $543,000 + 14 non-open-market transactions below Avg return of open purchases vs now: 4.6% last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

14 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 9, 2026	MP	P	10,000	$54.30	$543,000	136,622	—	—	4.6% (price as of 2026-08-19)
Feb. 17, 2024	MP	F	171,462	$16.55	$2,837,696	1,372,975 Direct	-11.10%	Disposed	243.2% (price as of 2026-08-19)
Jan. 12, 2024	MP	A	77,158	—	—	1,544,437 Direct	+5.26%	Acquired	(price as of 2026-08-19)
May 31, 2023	MP	P	5,000	$20.69	$103,450	126,622 Indirect	+4.11%	Acquired	174.5% (price as of 2026-08-19)
May 30, 2023	MP	P	6,000	$21.14	$126,840	121,622 Indirect	+5.19%	Acquired	168.7% (price as of 2026-08-19)
May 26, 2023	MP	P	7,000	$21.63	$151,410	115,622 Indirect	+6.44%	Acquired	162.6% (price as of 2026-08-19)
May 25, 2023	MP	P	5,000	$22.22	$111,100	39,476 Indirect	+14.50%	Acquired	155.6% (price as of 2026-08-19)
May 23, 2023	MP	P	5,000	$22.03	$110,150	34,476 Indirect	+16.96%	Acquired	157.8% (price as of 2026-08-19)
May 22, 2023	MP	P	5,000	$21.78	$108,900	29,476 Indirect	+20.43%	Acquired	160.8% (price as of 2026-08-19)
May 19, 2023	MP	P	10,000	$21.21	$212,100	24,476 Indirect	+69.08%	Acquired	167.8% (price as of 2026-08-19)
May 18, 2023	MP	J	354,705	—	—	1,467,279 Direct	+31.88%	Acquired	(price as of 2026-08-19)
March 16, 2023	MP	F	345	$27.62	$9,529	1,112,574 Direct	-0.03%	Disposed	105.6% (price as of 2026-08-19)
Feb. 17, 2023	MP	F	154,116	$32.69	$5,038,052	1,112,919 Direct	-12.16%	Disposed	73.8% (price as of 2026-08-19)
Jan. 13, 2023	MP	A	18,625	—	—	1,267,035 Direct	+1.49%	Acquired	(price as of 2026-08-19)
March 16, 2022	MP	F	362	$43.95	$15,910	1,248,410 Direct	-0.03%	Disposed	29.2% (price as of 2026-08-19)
Feb. 17, 2022	MP	F	322,918	$41.60	$13,433,389	1,248,772 Direct	-20.55%	Disposed	36.5% (price as of 2026-08-19)
Jan. 14, 2022	MP	F	2,075	$46.83	$97,172	1,571,690 Direct	-0.13%	Disposed	21.3% (price as of 2026-08-19)
Jan. 14, 2022	MP	A	6,000	—	—	1,573,765 Direct	+0.38%	Acquired	(price as of 2026-08-19)
March 15, 2021	MP	F	829	$45.98	$38,117	1,567,765 Direct	-0.05%	Disposed	23.5% (price as of 2026-08-19)
March 15, 2021	MP	A	2,794	—	—	1,568,594 Direct	+0.18%	Acquired	(price as of 2026-08-19)
March 15, 2021	MP	A	2,794	—	—	1,565,800 Direct	+0.18%	Acquired	(price as of 2026-08-19)
Nov. 17, 2020	MP	A	1,563,006	—	—	1,563,006 Direct	—	Acquired	(price as of 2026-08-19)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

MP

CEO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2020	$262,938	$200,000	$22,491,656	—	—	—	$23,220	$22,977,814

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.