Summary
Updated Aug 31, 2026
Robert C. Biesterfeld Jr. has 6 SEC Form 4 filings on record going back to 2024, most recently on 2 July 2026.
Trading Pattern
InsiderAlpha's records for Robert C. Biesterfeld Jr. go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. 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.
Most Active Insiders Right Now
Robert C. Biesterfeld Jr. has no co-filers on record, so these are insiders with the largest open-market activity across the market in the last 90 days.
- Nathan Blecharczyk - $190.48M of ABNB open-market activity in the last 90 days
- John Oyler - $189.61M of ONC open-market activity in the last 90 days
- WBR Holdings LLC - $177.14M of WBI open-market activity in the last 90 days
- David N. Capobianco - $177.14M of WBI open-market activity in the last 90 days
- WaterBridge Resources LLC - $177.14M of WBI open-market activity in the last 90 days
- Insight Holdings Group, LLC - $174.75M of HNGE open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Robert C. Biesterfeld Jr.?
Robert C. Biesterfeld Jr. is a corporate insider, tracked as Director. InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Robert C. Biesterfeld Jr. last file a Form 4?
The most recent primary Form 4 on record is dated 2 July 2026, one of 6 filings going back to 2024.
Where can I see all of Robert C. Biesterfeld Jr.'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.
Learn More
No Form 4 transactions on record for Robert C. Biesterfeld Jr. yet.
Filings appear here automatically as they arrive from SEC EDGAR.
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