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Regeneron Pharmaceuticals (REGN) Short Interest Ratio & Short Volume

Regeneron Pharmaceuticals logo
$580.70 +1.09 (+0.19%)
Closing price 04:00 PM Eastern
Extended Trading
$580.25 -0.45 (-0.08%)
As of 07:59 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
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Regeneron Pharmaceuticals Short Interest Data

Regeneron Pharmaceuticals (REGN) has a short interest of 2.29 million shares, representing 2.24% of the float (the number of shares available for trading by the public). This marks a 10.63% increase in short interest from the previous month. The short interest ratio (days to cover) is 1.9, indicating that it would take 1.9 days of the average trading volume of 1.04 million shares to cover all short positions.

Current Short Interest
2,290,000 shares
Previous Short Interest
2,070,000 shares
Change Vs. Previous Month
+10.63%
Dollar Volume Sold Short
$1.25 billion
Short Interest Ratio
1.9 Days to Cover
Last Record Date
July 31, 2025
Outstanding Shares
105,990,000 shares
Float Size
102,130,000 shares
Short Percent of Float
2.24%
Today's Trading Volume
574,305 shares
Average Trading Volume
1,042,369 shares
Today's Volume Vs. Average
55%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

REGN Short Interest Over Time

REGN Days to Cover Over Time

REGN Percentage of Float Shorted Over Time

Regeneron Pharmaceuticals Short Interest History

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
7/31/20252,290,000 shares $1.25 billion +10.6%2.2%1.9 $545.46
7/15/20252,070,000 shares $1.13 billion -8.0%2.0%1.6 $547.96
6/30/20252,250,000 shares $1.18 billion +10.8%2.2%1.7 $525.00
6/15/20252,030,000 shares $1.07 billion -24.8%2.0%1.5 $529.24
5/31/20252,700,000 shares $1.33 billion -3.6%2.6%2 $493.24
5/15/20252,800,000 shares $1.64 billion -3.1%2.7%2.5 $584.99
4/30/20252,890,000 shares $1.73 billion +11.2%2.8%2.7 $598.76
4/15/20252,600,000 shares $1.45 billion -6.8%2.6%2.6 $557.91
3/31/20252,790,000 shares $1.77 billion -14.2%2.8%2.8 $634.23
3/15/20253,250,000 shares $2.17 billion +26.5%3.2%3.5 $666.87
2/28/20252,570,000 shares $1.80 billion +16.8%2.5%2.8 $698.74
2/15/20252,200,000 shares $1.48 billion +0.5%2.2%2.5 $673.60
1/31/20252,190,000 shares $1.47 billion +3.3%N/A2.4 $672.98
1/15/20252,120,000 shares $1.49 billion +1.0%N/A2.4 $703.43
12/31/20242,100,000 shares $1.50 billion +11.7%N/A2.6 $712.33
12/15/20241,880,000 shares $1.37 billion +4.4%N/A2.2 $731.30
11/30/20241,800,000 shares $1.35 billion +0.6%N/A2.3 $750.22
11/15/20241,790,000 shares $1.35 billion -3.2%N/A2.5 $756.81
10/31/20241,850,000 shares $1.55 billion +7.6%N/A2.9 $838.20
10/15/20241,720,000 shares $1.75 billion -0.6%N/A3 $1,016.53
9/30/20241,730,000 shares $1.82 billion -12.6%N/A3.3 $1,051.24
9/15/20241,980,000 shares $2.28 billion -5.7%N/A4.1 $1,153.35
8/31/20242,100,000 shares $2.49 billion -0.5%N/A4.6 $1,184.69
8/15/20242,110,000 shares $2.48 billion +5.0%N/A4.7 $1,175.33
7/31/20242,010,000 shares $2.17 billion +6.4%N/A4.6 $1,079.19
7/15/20241,890,000 shares $2.05 billion -7.4%N/A4.3 $1,082.11
6/30/20242,040,000 shares $2.14 billion +10.3%N/A4.5 $1,051.03
6/15/20241,850,000 shares $1.92 billion +5.7%N/A4.1 $1,036.52
5/31/20241,750,000 shares $1.72 billion +7.4%N/A4 $980.16
5/15/20241,630,000 shares $1.59 billion +3.8%N/A3.7 $978.21
4/30/20241,570,000 shares $1.40 billion +13.0%N/A3.4 $890.66
4/15/20241,390,000 shares $1.25 billion -2.1%N/A3 $898.56
3/31/20241,420,000 shares $1.37 billion +2.2%N/A3 $962.49
3/15/20241,390,000 shares $1.34 billion +2.2%N/A2.7 $964.47
2/29/20241,360,000 shares $1.31 billion -0.7%N/A2.4 $966.09
2/15/20241,370,000 shares $1.31 billion +9.6%N/A2.4 $954.73
1/31/20241,250,000 shares $1.18 billion +16.8%N/A2.2 $942.78
1/15/20241,070,000 shares $998.52 million +0.9%1.0%1.9 $933.20
12/31/20231,060,000 shares $930.99 million -13.1%1.0%2 $878.29
12/15/20231,220,000 shares $1.05 billion -0.8%1.2%2.4 $859.14
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11/30/20231,230,000 shares $1.01 billion -12.1%1.2%2.7 $823.81
11/15/20231,400,000 shares $1.11 billion +6.9%1.3%3.3 $792.38
10/31/20231,310,000 shares $1.02 billion -4.4%1.3%3 $779.89
10/15/20231,370,000 shares $1.15 billion +16.1%1.3%3 $839.63
9/30/20231,180,000 shares $971.09 million -18.6%1.1%2.4 $822.96
9/15/20231,450,000 shares $1.19 billion -2.0%1.4%2.5 $823.40
8/31/20231,480,000 shares $1.22 billion +8.8%1.4%2.5 $826.49
8/15/20231,360,000 shares $1.10 billion +1.5%1.3%2.1 $805.91
7/31/20231,340,000 shares $994.16 million +5.5%1.3%2.1 $741.91
7/15/20231,270,000 shares $912.52 million +17.6%N/A2 $718.52
6/30/20231,080,000 shares $776.02 million -12.2%N/A1.8 $718.54
6/15/20231,230,000 shares $963.18 million +7.9%N/A2.2 $783.07
5/31/20231,140,000 shares $838.54 million -5.8%N/A2 $735.56
5/15/20231,210,000 shares $908.66 million +2.5%N/A2.1 $750.96
4/30/20231,180,000 shares $946.11 million -2.5%1.1%2 $801.79
4/15/20231,210,000 shares $1.00 billion -6.9%1.2%2 $829.33
3/31/20231,300,000 shares $1.07 billion +7.4%1.2%2 $821.67
3/15/20231,210,000 shares $919.96 million +0.8%1.2%1.9 $760.30
2/28/20231,200,000 shares $912.50 million -10.5%1.2%1.9 $760.42
2/15/20231,340,000 shares $1.01 billion -8.2%1.3%2.1 $752.40
1/31/20231,460,000 shares $1.11 billion +3.6%1.4%2.2 $758.47
1/15/20231,410,000 shares $1.02 billion -6.0%1.4%2.2 $722.13
12/30/20221,500,000 shares $1.08 billion +4.2%1.5%2.2 $721.49
12/15/20221,440,000 shares $1.05 billion -7.1%1.4%2.1 $731.27
11/30/20221,550,000 shares $1.17 billion -11.9%1.5%2.1 $751.70
11/15/20221,760,000 shares $1.28 billion -0.6%1.7%2.3 $728.73
10/31/20221,770,000 shares $1.33 billion -16.1%1.7%2.3 $748.75
10/15/20222,110,000 shares $1.55 billion -7.5%2.1%2.8 $736.06
9/30/20222,280,000 shares $1.57 billion -3.8%2.2%3.2 $688.87
9/15/20222,370,000 shares $1.67 billion -18.6%2.3%3.5 $705.85
8/31/20222,910,000 shares $1.69 billion -0.7%2.8%4.3 $581.06
8/15/20222,930,000 shares $1.88 billion -4.6%2.9%4.6 $643.29
7/31/20223,070,000 shares $1.79 billion +7.3%3.0%4.6 $581.69
7/15/20222,860,000 shares $1.74 billion +3.3%2.8%4.3 $607.54
6/30/20222,770,000 shares $1.64 billion +7.4%N/A4.1 $591.13
6/15/20222,580,000 shares $1.45 billion +23.4%N/A3.7 $561.19
5/31/20222,090,000 shares $1.39 billion -4.1%N/A3.1 $664.74
5/15/20222,180,000 shares $1.41 billion +0.9%N/A3.4 $645.52
4/30/20222,160,000 shares $1.42 billion +0.5%N/A3.2 $659.11
4/15/20222,150,000 shares $1.58 billion -2.3%2.1%3 $733.02
3/31/20222,200,000 shares $1.54 billion -8.0%2.1%3 $698.42
3/15/20222,390,000 shares $1.59 billion +6.7%2.3%3.3 $665.93
2/28/20222,240,000 shares $1.39 billion +4.7%2.2%3 $618.36
2/15/20222,140,000 shares $1.35 billion +19.6%2.1%2.8 $630.15
1/31/20221,790,000 shares $1.09 billion -1.7%1.7%2.4 $608.59
1/15/20221,820,000 shares $1.12 billion +11.0%1.8%2.4 $615.24
12/31/20211,640,000 shares $1.04 billion +7.2%1.6%2.2 $631.52
12/15/20211,530,000 shares $1.01 billion +3.4%1.5%1.9 $657.93
11/30/20211,480,000 shares $942.06 million -8.1%1.4%2 $636.53
11/15/20211,610,000 shares $1.04 billion -14.4%1.6%2.1 $647.73
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10/29/20211,880,000 shares $1.20 billion +6.8%1.8%2.3 $639.94
10/15/20211,760,000 shares $973.70 million -2.2%1.7%2.2 $553.24
9/30/20211,800,000 shares $1.09 billion +14.7%1.8%2.4 $605.18
9/15/20211,570,000 shares $1.02 billion +15.4%1.5%2 $652.00
8/31/20211,360,000 shares $915.82 million -3.6%1.3%1.7 $673.40
8/13/20211,410,000 shares $880.95 million -11.3%1.4%1.8 $624.79
7/30/20211,590,000 shares $913.63 million -13.6%1.6%2.1 $574.61
7/15/20211,840,000 shares $1.08 billion +30.5%1.8%2.4 $589.32
6/30/20211,410,000 shares $787.54 million -26.6%1.4%1.8 $558.54
6/15/20211,920,000 shares $1.01 billion -9.0%1.9%2.4 $527.49
5/28/20212,110,000 shares $1.06 billion -5.4%2.1%2.6 $502.43
5/14/20212,230,000 shares $1.15 billion -4.7%2.2%2.6 $517.17
4/30/20212,340,000 shares $1.13 billion -14.9%2.3%2.5 $485.00
4/15/20212,750,000 shares $1.32 billion +24.4%2.7%2.8 $481.16
3/31/20212,210,000 shares $1.04 billion -16.9%2.2%2.1 $470.67
3/15/20212,660,000 shares $1.25 billion +14.7%2.6%2.6 $471.46
2/26/20212,320,000 shares $1.05 billion +10.0%2.3%2.2 $453.19
2/12/20212,110,000 shares $1.04 billion +8.8%2.1%2 $490.54
1/29/20211,940,000 shares $982.16 million -18.8%1.9%2 $506.27
1/15/20212,390,000 shares $1.24 billion +6.2%2.4%2.6 $517.91
12/31/20202,250,000 shares $1.08 billion +14.8%2.2%2.4 $478.30
12/15/20201,960,000 shares $980.74 million -8.0%1.9%1.9 $500.38
11/30/20202,130,000 shares $1.09 billion +6.0%2.1%2.2 $514.05
11/15/20202,010,000 shares $1.14 billion -7.4%2.0%2.1 $566.43
10/30/20202,170,000 shares $1.21 billion -6.9%2.1%2.4 $555.79
10/15/20202,330,000 shares $1.40 billion +13.7%2.3%2.7 $600.82
9/30/20202,050,000 shares $1.15 billion +28.1%2.0%2.4 $559.78
9/15/20201,600,000 shares $927.84 million +0.6%1.6%2.1 $579.90
8/31/20201,590,000 shares $985.69 million -0.6%1.6%2 $619.93

REGN Short Interest - Frequently Asked Questions

What is Regeneron Pharmaceuticals' current short interest?

Short interest is the volume of Regeneron Pharmaceuticals shares that have been sold short but have not yet been covered or closed out. As of July 31st, investors have sold 2,290,000 shares of REGN short. 2.24% of Regeneron Pharmaceuticals' shares are currently sold short. Learn More on Regeneron Pharmaceuticals' current short interest.

What is a good short interest ratio for Regeneron Pharmaceuticals?

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. REGN shares currently have a short interest ratio of 2.0. Learn More on Regeneron Pharmaceuticals's short interest ratio.

Which institutional investors are shorting Regeneron Pharmaceuticals?

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Regeneron Pharmaceuticals: Marex Group plc, Hudson Bay Capital Management LP, Wolverine Trading LLC, Nomura Holdings Inc., LMR Partners LLP, Hudson Bay Capital Management LP, Group One Trading LLC, Cubist Systematic Strategies LLC, BNP Paribas Financial Markets, Balyasny Asset Management L.P., Bank of America Corp DE, Jane Street Group LLC, Squarepoint Ops LLC, Qube Research & Technologies Ltd, Capula Management Ltd, Walleye Capital LLC, Walleye Trading LLC, Capital Fund Management S.A., Eisler Capital Management Ltd., JPMorgan Chase & Co., Mirae Asset Securities USA Inc., Bank of Montreal Can, Allianz Asset Management GmbH, Twin Tree Management LP, IMC Chicago LLC, Union Bancaire Privee UBP SA, Covenant Asset Management LLC, and Baader Bank Aktiengesellschaft. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

What is a good short interest percentage for Regeneron Pharmaceuticals?

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 2.24% of Regeneron Pharmaceuticals' floating shares are currently sold short.

Is Regeneron Pharmaceuticals' short interest increasing or decreasing?

Regeneron Pharmaceuticals saw a increase in short interest in July. As of July 31st, there was short interest totaling 2,290,000 shares, an increase of 10.6% from the previous total of 2,070,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

What is Regeneron Pharmaceuticals' float size?

Regeneron Pharmaceuticals currently has issued a total of 105,990,000 shares. Some of Regeneron Pharmaceuticals' outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Regeneron Pharmaceuticals currently has a public float of 102,130,000 shares.

How does Regeneron Pharmaceuticals' short interest compare to its competitors?

2.24% of Regeneron Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the sector of "medical" compare to Regeneron Pharmaceuticals: Amgen Inc. (2.33%), Gilead Sciences, Inc. (1.61%), Moderna, Inc. (18.29%), Intellia Therapeutics, Inc. (28.56%), Vir Biotechnology, Inc. (12.44%), Vertex Pharmaceuticals Incorporated (1.71%), AbbVie Inc. (0.86%), Eli Lilly and Company (0.84%), Merck & Co., Inc. (1.04%), Pfizer Inc. (1.90%),

Which stocks are the most shorted right now?

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($70.87 billion), Invesco QQQ ($30.12 billion), iShares Russell 2000 ETF ($19.85 billion), iShares 20+ Year Treasury Bond ETF ($10.34 billion), Strategy Inc ($8.98 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.61 billion), SPDR S&P Biotech ETF ($6.81 billion), Invesco S&P 500 Equal Weight ETF ($6.14 billion), Palo Alto Networks, Inc. ($5.97 billion), and Super Micro Computer, Inc. ($5.28 billion). View all of the most shorted stocks.

What does it mean to sell short Regeneron Pharmaceuticals stock?

Short selling REGN is an investing strategy that aims to generate trading profit from Regeneron Pharmaceuticals as its price is falling. REGN shares are trading up $1.09 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

How does a short squeeze work against Regeneron Pharmaceuticals?

A short squeeze for Regeneron Pharmaceuticals occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of REGN, which in turn drives the price of the stock up even further.

How often is Regeneron Pharmaceuticals' short interest reported?

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including REGN, twice per month. The most recent reporting period available is July, 31 2025.



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This page (NASDAQ:REGN) was last updated on 8/29/2025 by MarketBeat.com Staff
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