Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Explore the complete record of transactions filed by Harrison Robert Gardner. Insider active across 1 company, notably Sera Prognostics, INC.. Aggregated, 30 filings have been published. Breakdown: 0 buy · 27 sells. Total volume traded: €437k. History available since 6 March 2023. The latest transaction was disclosed on 11 March 2026 (Cession). Regulator: SEC (Form 4). The full history is free.
Companies and markets linked to Harrison Robert Gardner
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
4,902 shares@ US$9.5912.4% of flowClass A Common StockSEC:0001534969-24-000092:0
25 of 30 declarations
About Harrison Robert Gardner
Harrison Robert Gardner is a declarant linked to Sera Prognostics, INC. on XNAS, where he holds the role of Chief Information Officer. He has 30 filings in total, and across the sampled recent filings between 2023-03-07 and 2026-03-12, the activity is entirely selling, with sum_sell_eur at 437097 and sum_buy_eur at 0.