Summary
Updated Aug 31, 2026
Hans-Peter Gerber is CHIEF SCIENTIFIC OFFICER of SUTRO BIOPHARMA, INC. (STRO). 3 SEC Form 4 filings on record going back to 2025, most recently on 3 March 2026. Most recent open-market trade: bought $14K of STRO on 16 October 2025. Lifetime open-market purchases: $14K.
Recent Transactions
7Every recent SEC Form 4 transaction Hans-Peter Gerber has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Hans-Peter Gerber go back to 2025: 3 primary Form 4 filings, an average of 1.5 per year. The typical open-market purchase is $14K (1 buy totaling $14K). The largest single buy on record is $14K of STRO in 2025. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Hans-Peter Gerber files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Connie Matsui - $40K of STRO open-market activity in the last 12 months
- Gregory K. Chow - $16K of STRO open-market activity in the last 12 months
- Jane Chung - $10K of STRO open-market activity in the last 12 months
- David Pauling - $10K of STRO open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Hans-Peter Gerber?
Hans-Peter Gerber is a corporate insider, tracked as CHIEF SCIENTIFIC OFFICER of SUTRO BIOPHARMA, INC. (STRO). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Hans-Peter Gerber last file a Form 4?
The most recent primary Form 4 on record is dated 3 March 2026, one of 3 filings going back to 2025.
Has Hans-Peter Gerber been buying or selling stock?
Recorded transactions: 1 open-market purchase ($14K) and 0 open-market sales across all tracked filings.
Where can I see all of Hans-Peter Gerber's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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