Regeneron Pharmaceuticals REGN

$794.67

−$7.16 (-0.89%)

Market open · Sep 24, 2:00 pm ET

After hours $801.82 0.00%

Open$801.59

Prev close$801.82

Day range$789.41 – $807.21

Volume268.3K

Market cap$81.81B

P/E (TTM)19.7

Dividend yield0.46%

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership94.1%+0.35 pts vs. prior quarter

Institutions holding1,663-11 vs. prior quarter

Insider trades (recent)2 buys / 6 sellsNet selling

Short interest2.48% of floatDays to cover 3.9 · as of 31 Aug 2026

Short-sale volume share12.7%5-day average of daily volume

Net of large-order buying minus selling, in USD. Over this window: −$8.49M (10 inflow days, 10 outflow days).

Institutional holders1,663

Institutional ownership94.1%

Total transactions21

Bought2

Sold6

Report date	Shares short	% of float	Days to cover
31 Aug 2026	2,552,029	2.5%	3.9
14 Aug 2026	2,396,152	2.3%	3.2
31 Jul 2026	3,385,841	3.3%	3.9
15 Jul 2026	3,501,203	3.3%	4.7
30 Jun 2026	3,494,420	3.3%	2.9
15 Jun 2026	3,304,329	3.2%	3.4