Insiders who reported open-market trades in the last 12 months at the companies Sara Bonstein 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.
Roger Adsett - $47.51M in INSM purchases and sales in the last 12 months
William Lewis - $26.07M in INSM purchases and sales in the last 12 months
Martina M.D. Flammer - $17.99M in INSM purchases and sales in the last 12 months
Leo Lee - $14.69M in INSM purchases and sales in the last 12 months
Sara Bonstein is a corporate insider of Xilio Therapeutics, Inc. (XLO). InsiderAlpha holds 12 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Sara Bonstein last file a Form 4?
The most recent primary Form 4 on record is dated 12 June 2026, one of 12 filings going back to 2025.
Has Sara Bonstein been buying or selling stock?
Recorded transactions: 0 open-market purchases and 18 open-market sales ($24.71M) across all tracked filings.
Sara Bonstein files SEC Form 4 reports at Xilio Therapeutics, Inc. (XLO). 12 SEC Form 4 filings on record going back to 2025, most recently on 12 June 2026. Most recent open-market trade: sold $246K of INSM on 5 June 2026. Lifetime open-market sales: $24.71M.
Recent transactions
20
The latest 20 SEC Form 4 transactions reported by Sara Bonstein.
InsiderAlpha's records for Sara Bonstein go back to 2025: 12 primary Form 4 filings, an average of 6.0 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
