REGN Insider Trading

Company officers and directors buying and selling their own stock, as reported to the SEC on Form 4.

32 open-market transactions — 0 purchases, 32 sales · 2026-08-10 to 2026-10-14

Date Ticker Insider Action Shares Price Filing
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 463 780.63 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 454 778.64 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 380 779.59 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 376 775.46 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 283 771.56 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 279 766.47 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 271 765.39 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 224 773.40 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 219 764.40 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 211 772.56 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 192 767.39 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 127 769.30 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 121 774.48 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 105 768.33 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 74 760.65 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 66 776.31 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 55 762.57 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 50 781.47 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 38 777.76 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 35 755.91 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 27 761.36 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 25 763.76 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 24 758.16 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 16 757.68 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 14 759.96 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 12 770.20 SEC
2026-10-14 REGN MURPHY ANDREW J — Co-Chief Scientific Officer Sell 6 753.76 SEC
2026-09-03 REGN McCourt Marion — EVP Commercial Sell 1.1K 857.39 SEC
2026-09-02 REGN McCourt Marion — EVP Commercial Sell 1.2K 850.00 SEC
2026-09-02 REGN Guarini Kathryn — Director Sell 400 850.00 SEC
2026-08-10 REGN Zoghbi Huda Y — Director Sell 800 800.00 SEC
2026-08-10 REGN Guarini Kathryn — Director Sell 400 800.00 SEC

What Form 4 actually tells you

Officers, directors and anyone holding more than 10% of a company must report trades in its stock to the SEC within two business days, on Form 4. The filings are public the moment they land, and every row above links to the original.

Buys and sells are not symmetric

This is the thing worth internalising. An insider sells for a hundred reasons that say nothing about the company — diversification, a house, a tax bill, or a pre-scheduled 10b5-1 plan set up months earlier. An insider buying on the open market with their own money has exactly one obvious motive.

Which is why this page shows only open-market purchases and sales. Form 4 also reports option grants, option exercises and shares withheld to cover taxes; those are compensation mechanics, and screens that fold them in produce noise that looks like signal.

Why cluster buying is the part worth watching

A single insider buying tells you very little. They may be topping up after a sale, converting a bonus, or simply buying because they always buy in January. The signal researchers actually find informative is a cluster: several different insiders at the same company, buying on the open market, independently, inside a short window.

That is hard to explain away as personal circumstance. It usually means several people with the same non-public view of the business reached the same conclusion at once. The table above lists companies where three or more distinct insiders bought within 90 days — and it is worth noting how short that list usually is. Genuine clusters are rare, which is rather the point.

Timing and limits

Where this comes from

Parsed directly from SEC EDGAR — the daily filing index, then each Form 4's XML. Public domain, no vendor in between, which is why the original filing can be linked from every row.