Robert Gardner Harrison serves as Chief Information Officer of SERA PROGNOSTICS, INC. (SERA). Harrison has reported 24 insider filings with the SEC since 2024. The most recent filing was in May 2026.
Every role Robert Gardner Harrison has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
SERA PROGNOSTICS, INC. (SERA)16 filingsUpdated Aug 30, 2026
Robert Gardner Harrison is Chief Information Officer of SERA PROGNOSTICS, INC. (SERA). 16 SEC Form 4 filings on record going back to 2024, most recently on 6 May 2026. Most recent open-market trade: sold $1K of SERA on 13 March 2026. Lifetime open-market sales: $133K.
Every recent SEC Form 4 transaction Robert Gardner Harrison has reported, most recent first.
InsiderAlpha's records for Robert Gardner Harrison go back to 2024: 16 primary Form 4 filings, an average of 5.3 per year. 6 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Insiders who reported open-market trades in the last 12 months at the companies Robert Gardner Harrison 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.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Robert Gardner Harrison is a corporate insider, tracked as Chief Information Officer of SERA PROGNOSTICS, INC. (SERA). InsiderAlpha holds 16 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
The most recent primary Form 4 on record is dated 6 May 2026, one of 16 filings going back to 2024.
Recorded transactions: 0 open-market purchases and 15 open-market sales ($133K) across all tracked 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.
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
$SERA SERA PROGNOSTICS, INC.2.0K shares @ $2.34$5K