Summary
Updated Aug 31, 2026
Bihua Chen is Director, 10% Owner of BlossomHill Therapeutics, Inc. (BLSM). 8 SEC Form 4 filings on record going back to 2025, most recently on 10 August 2026. Most recent open-market trade: bought $5.00M of BLSM on 10 August 2026. Lifetime open-market purchases: $13.00M. Lifetime open-market sales: $46.87M.
Recent Transactions
20Every recent SEC Form 4 transaction Bihua Chen has reported, most recent first.
$BBOT BridgeBio Oncology Therapeutics, Inc.J - Other acquisition / disposition130.9K shares @ $0.00-
Trading Pattern
InsiderAlpha's records for Bihua Chen go back to 2025: 8 primary Form 4 filings, an average of 4.0 per year. The typical open-market purchase is $6.50M (2 buys totaling $13.00M). The largest single buy on record is $8.00M of HLXC in 2026. Sales side: 5 recorded sales totaling $46.87M, so the filing history runs sell-heavy by dollar value. 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 Bihua Chen 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.
- ORBIMED ADVISORS LLC - $10.00M of BLSM open-market activity in the last 12 months
- Carl L. Gordon - $10.00M of BLSM open-market activity in the last 12 months
- John P. Schmid - $96K of BLSM open-market activity in the last 12 months
- Vincent Paul Liptak - $75K of BLSM open-market activity in the last 12 months
- Jason A. Keyes - $11K of BLSM 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 Bihua Chen?
Bihua Chen is a corporate insider, tracked as Director, 10% Owner of BlossomHill Therapeutics, Inc. (BLSM). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Bihua Chen submitted recently?
3 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Bihua Chen been buying or selling stock?
Recorded transactions: 2 open-market purchases ($13.00M) and 5 open-market sales ($46.87M) across all tracked filings.
Where can I see all of Bihua Chen'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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