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John Prosper Mack is Director at Orchestra Biomed Holdings. OQRO lists 3 transactions filed with the SEC under this name, the latest on Aug 14, 2026, each linked to the official Form 4.
Director
Disclosures on record
3
Companies involved
1
As of the latest filing on , John Prosper Mack reported holding 66,544 shares of Orchestra Biomed Holdings (OBIO), worth about $482K at the last close of $7 (Nov 13, 2026).
| Company | Shares reported | How held | Last close | Value at last close | Reported |
|---|---|---|---|---|---|
| Orchestra Biomed Holdings OBIO | 66,544 | 67K direct | $7 | $482K | Aug 12, 2026 |
Is this John Prosper Mack’s net worth? No. A Form 4 reports the shares an insider owns in one company after each transaction, directly or through trusts and entities. It says nothing about cash, other investments, property or debt, options not yet exercised are not counted here, and a holding reported some time ago may have changed without a new filing. The value is shares times the last stored close, not a price anyone received. Sources: the filings listed below, each linked to EDGAR. Compare with the biggest insider stakes.
Orchestra Biomed HoldingsOBIO
3 disclosures · Jun 2026 – Aug 2026
Aug 12, 20264,885disclosed Aug 14
DetailsOfficial recordJun 23, 202635Kdisclosed Jun 25
DetailsOfficial recordJun 24, 20263,510disclosed Jun 25
DetailsOfficial recordOn the latest SEC Form 4, dated Aug 12, 2026, John Prosper Mack reported holding 66,544 shares of Orchestra Biomed Holdings (OBIO). At the last close of $7 on Nov 13, 2026, that is about $482K. This is the stake disclosed in filings, not a net worth.