Regeneron Pharmaceuticals (REGN) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 15, 2026.
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- Filings shown
- 7
- Open-market buys
- 0
- Open-market sells
- 32
Counts cover the 7 most recent Form 4 filings Tradune holds for REGN (filed Aug 12 – Oct 15, 2026). No completed check of REGN's Form 4 list on SEC EDGAR is on record yet; the latest REGN filing Tradune holds was filed Oct 15, 2026. This is not guaranteed to be the complete record — see REGN's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 7 filings Tradune holds for REGN filed Aug 12 – Oct 15, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
32 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 30 sales· 6,893 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 2 sales· 1,200 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Andrew J. MurphyCo-Chief Scientific Officer | 0 | 27 | — | 4,147 | −$3,204,376 |
| Marion McCourtEVP Commercial | 0 | 2 | — | 2,346 | −$2,002,458 |
| Kathryn GuariniDirector | 0 | 2 | — | 800 | −$660,000 |
| Huda Y. ZoghbiDirector | 0 | 1 | — | 800 | −$640,000 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at REGN
No open-market insider purchases (Form 4 code P) were reported for REGN in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 211 | $772.56 | 50,005 | −0.4% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 219 | $764.40 | 51,485 | −0.4% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 271 | $765.39 | 51,214 | −0.5% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 279 | $766.47 | 50,935 | −0.5% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 192 | $767.39 | 50,743 | −0.4% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 105 | $768.33 | 50,638 | −0.2% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 127 | $769.30 | 50,511 | −0.3% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 12 | $770.20 | 50,499 | −0.0% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 283 | $771.56 | 50,216 | −0.6% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 224 | $773.40 | 49,781 | −0.4% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 121 | $774.48 | 49,660 | −0.2% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 376 | $775.46 | 49,284 | −0.8% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 66 | $776.31 | 49,218 | −0.1% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 38 | $777.76 | 49,180 | −0.1% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 454 | $778.64 | 48,726 | −0.9% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 380 | $779.59 | 48,346 | −0.8% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 463 | $780.63 | 47,883 | −1.0% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 50 | $781.47 | 47,833 | −0.1% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 24 | $758.16 | 51,899 | −0.0% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 14 | $759.96 | 51,885 | −0.0% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 6 | $753.76 | 51,974 | −0.0% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 35 | $755.91 | 51,939 | −0.1% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 16 | $757.68 | 51,923 | −0.0% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 74 | $760.65 | 51,811 | −0.1% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 27 | $761.36 | 51,784 | −0.1% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 55 | $762.57 | 51,729 | −0.1% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 25 | $763.76 | 51,704 | −0.0% | Oct 14, 2026 |
| Option exercise Non-Qualified Stock Option (right to buy) | 17,000 | — | — | — | Oct 13, 2026 |
| Tax withholding | 12,853 | $754.58 | 51,980 | −20% | Oct 13, 2026 |
| Option exercise | 17,000 | $381.92 | 64,833 | +36% | Oct 13, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 1,131 | $857.39 | 12,003 | −8.6% | Sep 3, 2026 |
| Open-market sale 10b5-1 box checked | 1,215 | $850.00 | 13,134 | −8.5% | Sep 2, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Non-Qualified Stock Option (right to buy) | 400 | — | — | — | Sep 2, 2026 |
| Option exercise | 400 | $719.37 | 1,003 | +66% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 400 | $850.00 | 603 | −40% | Sep 2, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 12,282 | $381.92 | — | — | Aug 19, 2026 |
| Option exercise Non-Qualified Stock Option (right to buy) | 12,282 | — | — | — | Aug 19, 2026 |
| Tax withholding | 9,019 | $830.15 | — | — | Aug 19, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 4,599 | $813.47 | — | — | Aug 18, 2026 |
| Option exercise | 6,283 | $381.92 | — | — | Aug 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 400 | $719.37 | — | — | Aug 10, 2026 |
| Open-market sale | 400 | $800.00 | — | — | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 800 | $376.69 | — | — | Aug 10, 2026 |
| Open-market sale | 800 | $800.00 | — | — | Aug 10, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to REGN's (Oct 15, 2026).
Frequently asked about REGN insider activity
How many insiders bought REGN stock in the last 90 days?
No open-market purchases (Form 4 code P) of REGN shares were reported by Regeneron Pharmaceuticals insiders in the trailing 90 days. The 7 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for REGN?
The most recent Form 4 on this page was filed by Andrew J. Murphy (Co-Chief Scientific Officer) on Oct 15, 2026, reporting 30 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market REGN insider sale shown?
The largest open-market sale among the filings shown was 1,215 REGN shares at $850.00 (about $1,032,750) by Marion McCourt (EVP Commercial) on Sep 2, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track REGN insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.