Ticker
REGN
Regeneron Pharmaceuticals, Inc. - Common Stock (REGN)
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REGN in the last 90 days
Regeneron Pharmaceuticals, Inc. - Common Stock (REGN) (REGN) had no congress transactions and no insider purchases in filings from the last 90 days.
FINRA’s latest report (settlement 15 SEPT 2026) shows 2,526,446 shares held short, 4.4 days to cover, down 1.0% from the report before.
- Delay: each filing below shows how many days passed between the trade and its publication. None of this is real-time.
Latest filing on file: 08 JUN 2026 · FINRA settlement 15 SEPT 2026 · public filings, reported as filed
What the price is doing
REGN is down 4%, and short sellers have been backing off.
Bets against it — they pay off if the price falls — are down 11% over the same stretch.
Politician activityBoughtSoldHover a dot for details
Short sellers
11 reports · twice a month
Money betting REGN falls. Reported twice a month, and it shows up seven working days late.
Insiders
Nothing reported
Traded over six months
Quiet Money
Our take on how well REGN holds up when sellers show up.
How it holds up · last 60 trading days
Through 21 SEPT 2026
Mixed
When REGN gets hit lately, it goes both ways.
Lately, REGN holds firm some days and gives way on others.
That's been true for the last 11 trading days.
The last 6 months
What the filings show
What the filings show · last 90 days
1 of 4 sources
+70Leaning in
The disclosed money is leaning into this name, on what has actually been filed. This reads on one source only, so treat it lightly.
- Short interest
- Short interest fell 27.8% — 3,501,203 to 2,526,446 shares between 15 JUL 2026 and 15 SEPT 2026. See the filings →
- +70
This summarises filings that have already been published — it is not a forecast, a rating of the company, or advice. Every figure above is listed in full further down this page, with the document it came from.
FINRA short interest
Settlement 15 SEPT 2026 · shares held short
2,526,446shares held short
Days to cover
4.42
Avg daily volume
571,271
Since last report
-1.00%
As of 15 September 2026, 2,526,446 Regeneron Pharmaceuticals, Inc. - Common Stock (REGN) shares were held short — the total across every reporting firm, not one fund's position. That is 25,583 shares fewer than the previous report, a 1.00% decrease. At the average daily volume of 571,271 shares, that position represents 4.42 days of trading — what the filing calls days to cover.
This is the most recent figure that exists, and it is 17 days old. FINRA collects short interest twice a month, on a settlement date, and publishes it about eight business days later. So nobody has a live short-interest number for REGN — not us, and not anyone quoting one. We print the settlement date on the figure so you always know which day you are looking at.
Across the 12 reports we hold, the position has fallen from 2,548,311 shares on 31 March 2026 to 2,526,446 today, a change of 0.9%. The highest reading in that window was 3,501,203 shares on 15 July 2026.
| Settlement | Shares short | Days to cover |
|---|---|---|
| 15 SEPT 2026 | 2,526,446 | 4.42 |
| 31 AUG 2026 | 2,552,029 | 3.85 |
| 14 AUG 2026 | 2,396,152 | 3.15 |
| 31 JUL 2026 | 3,385,841 | 3.94 |
| 15 JUL 2026 | 3,501,203 | 4.72 |
| 30 JUN 2026 | 3,494,420 | 2.91 |
| 15 JUN 2026 | 3,304,329 | 3.41 |
| 29 MAY 2026 | 3,001,968 | 1.96 |
| 15 MAY 2026 | 2,780,809 | 3.64 |
| 30 APR 2026 | 3,270,341 | 4.06 |
| 15 APR 2026 | 2,841,780 | 4.36 |
| 31 MAR 2026 | 2,548,311 | 4.22 |
- What is REGN's short interest?
- 2,526,446 shares, as of the 15 September 2026 settlement date. That is the figure FINRA published, unadjusted.
- What percentage of the float is short?
- We do not publish that, because FINRA does not publish float. The regulator reports the number of shares held short; turning it into a percentage needs a share count from somewhere else, and different sources disagree about what counts as float. We would rather give you the number that was actually filed than a percentage built on an assumption.
- How current is this?
- It is 17 days old, and that is as fresh as short interest gets. FINRA measures it twice a month and publishes it seven business days after the settlement date. Any site showing you a "live" short interest figure is showing you something else.
- What does days to cover mean?
- It is the short position divided by average daily trading volume — here, 4.42. It describes how many days of ordinary trading the position is equivalent to. It is arithmetic from the filing, not a prediction about what will happen.
- Where does this come from?
- FINRA's consolidated short interest file, which is public. We read it directly and store it unchanged, except that we blank the days-to-cover placeholder FINRA writes when a stock has almost no volume.
Disclosed insider buying on file
—no purchase on file passed the price check
Open-market purchases only — the amount is a fact, not a verdict.
On file here
Short positions0
Insider purchases0
Congress transactions13
Latest change08 JUN 2026
Congress transactions on file
13 disclosed · newest first · every row links to its filing
| Who | Amount as filed | Traded | Filed | Lag | |
|---|---|---|---|---|---|
| Hon. Gilbert Cisneros | SOLD | $1,001 – $15,000 | 15 MAY 2026 | 08 JUN 2026 | 24 days |
| Hon. Julia Letlow | BOUGHT | $1,001 – $15,000 | 12 FEB 2026 | 12 MAR 2026 | 28 days |
| Hon. Gilbert Cisneros | BOUGHT | $1,001 – $15,000 | 18 NOV 2025 | 15 DEC 2025 | 27 days |
| Hon. Rob Bresnahan | BOUGHT | $1,001 – $15,000 | 15 MAY 2025 | 09 JUN 2025 | 25 days |
| Hon. Byron Donalds | SOLD | $1,001 – $15,000 | 10 APR 2025 | 24 MAY 2025 | 44 days |
| Hon. Byron Donalds | SOLD | $1,001 – $15,000 | 10 APR 2025 | 24 MAY 2025 | 44 days |
| Hon. Julie Johnson | SOLD | $1,001 – $15,000 | 01 APR 2025 | 14 MAY 2025 | 43 days |
| Hon. Jefferson Shreve | SOLD | $15,001 – $50,000 | 07 APR 2025 | 08 MAY 2025 | 31 days |
| Hon. Rob Bresnahan | SOLD | $1,001 – $15,000 | 08 APR 2025 | 08 MAY 2025 | 30 days |
| Hon. Rob Bresnahan | SOLD | $1,001 – $15,000 | 25 FEB 2025 | 27 MAR 2025 | 30 days |
| Hon. Julie Johnson | SOLD | $1,001 – $15,000 · partial | 12 FEB 2025 | 12 MAR 2025 | 28 days |
| Hon. Julie Johnson | BOUGHT | $1,001 – $15,000 | 15 JAN 2025 | 12 FEB 2025 | 28 days |
| Hon. Josh Gottheimer | SOLD | $1,001 – $15,000 | 24 JAN 2025 | 10 FEB 2025 | 17 days |