Insiders who reported open-market trades in the last 12 months at the companies David R. Horn 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.
Lance Willsey - $238K in EDAP purchases and sales in the last 12 months
Omid Farokhzad - $115K in SEER purchases and sales in the last 12 months
Ryan Rhodes - $100K in EDAP purchases and sales in the last 12 months
Joshua Levine - $90K in EDAP purchases and sales in the last 12 months
Fran Schulz - $48K in EDAP purchases and sales in the last 12 months
Sanket Shah - $24K in EDAP purchases and sales in the last 12 months
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David R. Horn is a corporate insider, tracked as PRESIDENT & CFO of Seer, Inc. (SEER). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has David R. Horn submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has David R. Horn been buying or selling stock?
Recorded transactions: 1 open-market purchase ($48K) and 5 open-market sales ($70K) across all tracked filings.
David R. Horn is PRESIDENT & CFO of Seer, Inc. (SEER). 8 SEC Form 4 filings on record going back to 2024, most recently on 19 August 2026. Most recent open-market trade: sold $15K of SEER on 19 August 2026. Lifetime open-market purchases: $48K. Lifetime open-market sales: $70K.
Recent transactions
7
The latest 7 SEC Form 4 transactions reported by David R. Horn.
InsiderAlpha's records for David R. Horn go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. The typical open-market purchase is $48K (1 buy totaling $48K). The largest single buy on record is $48K of EDAP in 2026. Sales side: 5 recorded sales totaling $70K, so the filing history runs sell-heavy by dollar value. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
