Regeneron Pharmaceuticals

REGN · United States

Regeneron Pharmaceuticals traded $424.0M on 23 Oct 2026, 0.8× its 20-session average. Sector: Diversified Pharma & Biotech.

504 trading days of history, to 2026-10-23 · all values converted to USD

Last close
$805.02
23 Oct
1-day change
-1.7%
vs previous close
Company value, all classes
$82.9B
how it is counted
Turnover
0.51%
of company value traded
Dollar volume
$424.0M
as of 23 Oct
vs prior 20 sessions
0.8×
as of 23 Oct
Share of market volume
0.11%
as of 23 Oct
Volatility
36.5%
annualised

Share classes

REGN is one class of a company with several. The company is valued once: every counted class at its own price, or a class that converts at the price of the class it converts into. Counts from the company's 10-Q, as of 2026-07-23.

  • Class A Stock1.8M · counted at the close of the class it converts into, one for one
    “Shares of Class A Stock are convertible, at any time, at the option of the holder into shares of Common Stock on a share-for-share basis.” — 12. Stockholders' Equity
  • Common Stock101.1M · this line, at its own close

Infinity volume insights

since 14 April 2025

Every session our rules flagged for this company since 14 April 2025: 10. Those marked “In the feed” were published in the daily feed at the time; the rest are computed with the rules in use now. The feed shows a few a day across every market, so most never appear there. We began tracking this company on 28 September 2026; findings before then are marked “Before we tracked it”: it traded that way, and we were not yet watching.

  1. 2026-09-18Before we tracked it

    Regeneron Pharmaceuticals traded 3.9× its average dollar volume on a -0.58% price move

    The price moved less than 0.75% either way. $1.9B against a 20-day average of $493.4M, on a falling price (-0.58%). Turnover 2.4% of market cap, one of its own heaviest 1% of sessions in the past year. Dollar volume 3.9× normal; turnover 2.4% of market cap (4.1× its usual turnover).

The latest is shown; the other 9 open with the full page.

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Prices and volume via the daily pipeline, converted to USD.

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