REGENERON PHARMACEUTICALS, INC. (REGN) insider trading
No open-market insider purchases of REGENERON PHARMACEUTICALS, INC. are on record; 1 open-market sale is.
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Insider purchases
No open-market purchases on record.
Insider sales
1 open-market sale on record
| Filed | Insider | Sold |
|---|---|---|
| Oct 15 Form 4 (opens sec.gov) |
Andrew J. MurphyChief Scientific Officer · planned (10b5-1) · option shares | $3.2M 4,147 at $772.70 |
Most insider sales are planned in advance or made for personal reasons, so a sale says less than a buy.
REGN trades reported by members of Congress
| Reported | Member | Trade | Amount |
|---|---|---|---|
| Jul 21 |  Alan ArmstrongR-OK · Senate116 days after the trade | Buy | $1K–$15K |
Members of Congress report trades up to 45 days later, in dollar ranges. Every member's trades.
Planned insider sales of REGN (Form 144)
| Filed | Insider | To sell |
|---|---|---|
| Oct 30 Form 144 | MICHAEL S BROWNDirector · 10b5-1 plan | $1.6M 1,929 shares from Oct 30 |
| Oct 30 Form 144 | Guarini KathrynDirector · 10b5-1 plan | $360k 400 shares from Oct 30 |
| Oct 30 Form 144 | McCourt MarionOfficer · 10b5-1 plan | $984k 1,132 shares from Oct 30 |
| Oct 14 Form 144 | MURPHY ANDREW JOfficer · 10b5-1 plan | $3.2M 4,147 shares from Oct 14 |
A Form 144 is filed before an insider sells restricted or control shares; the Form 4 reports the sale once made.
Questions
Are insiders buying REGN stock?
Not recently: no open-market purchases were filed in the last 90 days.
Who bought REGN stock most recently?
No insider has bought REGN on the open market in the filings on record.
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Oct 15, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer