Insider profile
Michael Stuart Rosenthal Insider Trading
This page tracks every SEC Form 4 filing since April 2023 by Michael Stuart Rosenthal, Chief Operating Officer: 26 transactions in total, including 10 open-market purchases and 3 sales. Each record is parsed directly from the original filing, with amendments reconciled so a corrected filing never double-counts.
- Role
- Chief Operating Officer
- CIK
- 0001832050
- Companies traded
- 1
- Total filings
- 26
- First filing
- 2023-05-18
- Last filing
- 2026-06-09
Files as Rosenthal Michael Stuart · SEC EDGAR ↗
Activity summary
The most recent open-market decision was a purchase of 10,000 shares ($543K) on June 9, 2026.
Three year balance
Buy and sell value by quarter, Q3 23 to Q2 26. Michael Stuart Rosenthal has been a net seller across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $10.8M.
Insider insight
Michael Stuart Rosenthal trades most actively in MP, accounting for 13 of the 26 filings on record. The largest single open-market purchase on record is $963K in MP, filed May 2026.
Track record
Most active in
Avg buy vs sell price
Average prices across open-market transactions in this dataset.
Transaction History
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 9, 2026 | Michael Stuart Rosenthal | MP | Purchase | 10,000 | $54.30 | $543K |
| May 20, 2026 | Michael Stuart Rosenthal | MP | Purchase | 17,000 | $56.62 | $963K |
| Jan 13, 2026 | Michael Stuart Rosenthal | MP | Tax Withholding | 9,083 | $63.82 | $580K |
| Jan 12, 2026 | Michael Stuart Rosenthal | MP | Award | 33,648 | — | — |
| Jan 12, 2026 | Michael Stuart Rosenthal | MP | Award | 18,318 | — | — |
21 more transactions hidden
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curl "https://api.form4api.com/v1/insiders/0001832050/transactions" \
-H "X-Api-Key: $KEY"Companies traded
By number of filings.
Filing cadence
Filings per quarter, this window.
Busiest: Q2 23 (8 filings)
Quietest: Q3 23 (0 filings)
Reading an insider's Form 4 history
Corporate insiders — directors, officers, and holders of more than 10% of a company's stock — must report their trades to the SEC on Form 4 within two business days. Looking at one insider's filings over time shows whether they tend to buy on the open market (a discretionary use of their own money, generally the strongest signal), sell, or simply receive and exercise equity awards as compensation.
The track record above measures how this insider's past open-market purchases performed in the months after each filing. Trades made under a pre-scheduled Rule 10b5-1 plan are flagged because they carry no timing signal. To pull any insider's full history programmatically, see the insider trading API or our guide to reading Form 4 filings.