Insiders who reported open-market trades in the last 12 months at the companies Gregory L. Summe 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.
ILLUMINA, INC. - $79.85M in GRAL purchases and sales in the last 12 months
Robert P. Ragusa - $12.27M in GRAL purchases and sales in the last 12 months
Joshua J. Ofman - $11.84M in GRAL purchases and sales in the last 12 months
Aaron Freidin - $10.05M in GRAL purchases and sales in the last 12 months
Gregory L. Summe is a corporate insider, tracked as Director of GRAIL, Inc. (GRAL). InsiderAlpha holds 24 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Gregory L. Summe last file a Form 4?
The most recent primary Form 4 on record is dated 16 July 2026, one of 24 filings going back to 2024.
Has Gregory L. Summe been buying or selling stock?
Recorded transactions: 7 open-market purchases ($4.56M) and 0 open-market sales across all tracked filings.
Gregory L. Summe is Director of GRAIL, Inc. (GRAL). 24 SEC Form 4 filings on record going back to 2024, most recently on 16 July 2026. Most recent open-market trade: bought $940K of AVTR on 12 February 2026. Lifetime open-market purchases: $4.56M.
Recent transactions
20
The latest 20 SEC Form 4 transactions reported by Gregory L. Summe.
InsiderAlpha's records for Gregory L. Summe go back to 2024: 24 primary Form 4 filings, an average of 8.0 per year. The typical open-market purchase is $652K (7 buys totaling $4.56M). The largest single buy on record is $1.26M of AVTR in 2025. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
