What the SEC filings show
Mark S. Blumenkranz is named as a reporting owner in 12 source-backed SEC filings in this collection, associated with 2 public-company issuers. The most recent included filing was submitted Aug 12, 2026.
Filings may report stock transactions or holdings at a particular time. They do not establish the person's current share balance, portfolio value, total net worth, or whether a transaction was an open-market purchase or sale.
- Source filings
- 12
- Issuers represented
- 2
- Filings with transactions
- 12
- Filings with holdings
- 10
Recent SEC source documents
A selection of the latest 3 relevant source filings. Counts describe reported rows in the filing, not verified trades, economic proceeds, or personal profits. Older filings and amendments may contain different information.
How to interpret this evidence
SEC Forms 3, 4 and 5 disclose certain ownership and transaction observations. Reporting dates, beneficial ownership, derivative instruments, indirect positions and amendments can affect interpretation. Figures here are counts of filing records, not independent valuations. Exact total net worth is not publicly known from this filing record.
Browse this reporting owner's SEC filing history
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