REGN
REGENERON PHARMACEUTICALS, INC. · Healthcare · Market cap $88.4B
Insiders sold $3.4M net in the last 90 days ·4 sellers, 0 buyers· 6 of 6 sales under Rule 10b5-1 plans· latest Form 4 filed Sep 3, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$12.9M
reported sales (SEC code S)
Unique Insiders
7
in the rolling window
Latest filing
Sep 3, 2026
Guarini Kathryn
REGENERON PHARMACEUTICALS, INC. (REGN) has 44 SEC Form 4 filings (138 transaction rows) in the rolling window, disclosed by 7 distinct insiders. Most recent filing: Sep 3, 2026.
Inside the rolling window, 7 insiders at REGENERON PHARMACEUTICALS, INC. reported no open-market purchases and 16 open-market sales totaling $12.9M. The most active filer is Director RYAN ARTHUR F with 5 filings. Insiders have net sold $3.6M over the trailing 6 months. The most recent open-market filing is a sale of 400 shares by Director Guarini Kathryn, dated Sep 2, 2026, worth $340K.
- Industry:Biotechnology
- CEO:Leonard S. Schleifer
- Employees:15,158
- HQ:Tarrytown, NY, US
- IPO:1991-04-02
| Source | |||||||
|---|---|---|---|---|---|---|---|
| Director | Sale | 400 | $340K | Sep 3 | -1.9% | SEC ↗ | |
McCourt MarionFirst filing | EVP Commercial | Sale | 1,215 | $1.0M | Sep 3 | -1.9% | SEC ↗ |
McCourt MarionFirst filing | EVP Commercial | Sale | 1,131 | $970K | Sep 3 | -1.9% | SEC ↗ |
Zoghbi Huda YFirst in 6 months | Director | Sale | 800 | $640K | Aug 12 | +3.7% | SEC ↗ |
Guarini KathrynFirst filing | Director | Sale | 400 | $320K | Aug 12 | +3.7% | SEC ↗ |
| Director | Sale | 200 | $130K | Jul 7 | +22.4% | SEC ↗ | |
| Director | Sale | 100 | $71K | May 4 | +16.7% | SEC ↗ | |
| Director | Sale | 100 | $78K | Apr 3 | — | SEC ↗ | |
| Director | Sale | 100 | $79K | Mar 3 | — | SEC ↗ | |
Zoghbi Huda YFirst filing | Director | Sale | 1,638 | $1.3M | Feb 23 | — | SEC ↗ |
RYAN ARTHUR FFirst filing | Director | Sale | 100 | $78K | Feb 11 | — | SEC ↗ |
Pitofsky JasonFirst in 3 months | SVP Controller | Sale | 2,036 | $1.6M | Feb 11 | — | SEC ↗ |
| Director | Sale | 1,500 | $1.2M | Jan 8 | — | SEC ↗ | |
Bassler Bonnie LFirst filing | Director | Sale | 760 | $570K | Nov 24 | — | SEC ↗ |
Pitofsky JasonFirst filing | VP Controller | Sale | 431 | $281K | Nov 10 | — | SEC ↗ |
POON CHRISTINE AFirst filing | Director | Sale | 6,500 | $4.3M | Oct 31 | — | SEC ↗ |
Congress trading REGN 91 all-time
- DRep. Ro KhannaPurchase$1,001 - $15,0002026-07-07
- RSen. Alan ArmstrongPurchase$1,001 - $15,0002026-03-27
- RSen. Alan ArmstrongPurchase$1,001 - $15,0002026-03-27
- DRep. Gilbert CisnerosSale$1,001 - $15,0002026-05-15
- DRep. Gilbert Ray CisnerosSale$1,001 - $15,0002026-05-15
- DRep. Ro KhannaPurchase$1,001 - $15,0002026-04-13
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does REGN have?
REGENERON PHARMACEUTICALS, INC. (REGN) has 44 SEC Form 4 filings (138 transaction rows) in the rolling 365-day window, disclosed by 7 distinct insiders. Most recent filing: Sep 3, 2026.
When was the most recent SEC Form 4 filing for REGN?
The most recent Form 4 filing for REGN on Tracefour is dated Sep 3, 2026.
Who is the most active insider at REGN?
The most active SEC Form 4 filer at REGN in the rolling window is Director RYAN ARTHUR F, with 5 filings.
What is the net insider flow at REGN over the last 6 months?
Over the trailing 180 days, insiders at REGN have net sold $3.6M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at REGN in the current window?
Inside the rolling window, insiders at REGN bought $0 and sold $12.9M based on SEC Form 4 filings.
Can I get alerts for REGN insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at REGENERON PHARMACEUTICALS, INC. (REGN). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
REGENERON PHARMACEUTICALS, INC. is in the Healthcare sector.