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Merck & Co., Inc. (MRK) Short Interest Ratio & Short Volume

Merck & Co., Inc. logo
$77.59 -0.25 (-0.32%)
Closing price 05/23/2025 03:59 PM Eastern
Extended Trading
$77.70 +0.11 (+0.15%)
As of 05/23/2025 07:56 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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Merck & Co., Inc. Short Interest Data

Merck & Co., Inc. (MRK) has a short interest of 37.14 million shares, representing 1.48% of the float (the number of shares available for trading by the public). This marks a -11.42% decrease in short interest from the previous month. The short interest ratio (days to cover) is 2.2, indicating that it would take 2.2 days of the average trading volume of 12.55 million shares to cover all short positions.

Current Short Interest
37,140,000 shares
Previous Short Interest
41,930,000 shares
Change Vs. Previous Month
-11.42%
Dollar Volume Sold Short
$3.17 billion
Short Interest Ratio
2.2 Days to Cover
Last Record Date
April 30, 2025
Outstanding Shares
2,511,031,000 shares
Short Percent of Float
1.48%
Today's Trading Volume
10,899,340 shares
Average Trading Volume
12,545,046 shares
Today's Volume Vs. Average
87%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

MRK Short Interest Over Time

MRK Days to Cover Over Time

MRK Percentage of Float Shorted Over Time

Merck & Co., Inc. Short Interest History

Export to Excel
Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
4/30/202537,140,000 shares $3.17 billion -11.4%1.5%2.2 $85.23
4/15/202541,930,000 shares $3.28 billion +10.5%1.7%2.4 $78.28
3/31/202537,940,000 shares $3.40 billion +2.2%1.5%2.3 $89.74
3/15/202537,130,000 shares $3.52 billion -9.3%1.5%2.4 $94.72
2/28/202540,940,000 shares $3.78 billion +27.1%1.6%2.8 $92.23
2/15/202532,210,000 shares $2.67 billion +8.8%1.3%2.3 $83.01
1/31/202529,600,000 shares $2.92 billion -13.3%1.2%2.3 $98.80
1/15/202534,120,000 shares $3.42 billion +10.3%N/A3 $100.20
12/31/202430,930,000 shares $3.08 billion -3.4%N/A2.8 $99.48
12/15/202432,030,000 shares $3.27 billion -2.3%N/A2.8 $102.00
11/30/202432,790,000 shares $3.33 billion +24.6%N/A3.1 $101.64
11/15/202426,320,000 shares $2.53 billion +0.3%N/A2.6 $96.30
10/31/202426,230,000 shares $2.68 billion +0.7%N/A2.8 $102.32
10/15/202426,040,000 shares $2.90 billion -4.5%N/A2.6 $111.54
9/30/202427,260,000 shares $3.10 billion +9.9%N/A2.9 $113.56
9/15/202424,810,000 shares $2.87 billion -4.3%N/A2.5 $115.86
8/31/202425,910,000 shares $3.07 billion +4.4%N/A2.7 $118.45
8/15/202424,810,000 shares $2.81 billion -7.2%N/A2.6 $113.31
7/31/202426,720,000 shares $3.02 billion +8.8%N/A2.9 $113.13
7/15/202424,570,000 shares $3.15 billion +5.2%N/A3 $128.12
6/30/202423,350,000 shares $2.89 billion +19.9%N/A2.8 $123.80
6/15/202419,470,000 shares $2.52 billion -4.6%N/A2.6 $129.48
5/31/202420,410,000 shares $2.56 billion +0.7%N/A2.5 $125.58
5/15/202420,270,000 shares $2.67 billion +8.1%N/A2.5 $131.74
4/30/202418,750,000 shares $2.42 billion -8.2%N/A2.3 $129.19
4/15/202420,430,000 shares $2.58 billion +4.3%N/A2.5 $126.19
3/31/202419,590,000 shares $2.58 billion -15.4%N/A2.3 $131.95
3/15/202423,160,000 shares $2.81 billion +39.5%N/A2.8 $121.53
2/29/202416,600,000 shares $2.11 billion -1.3%N/A2.1 $127.15
2/15/202416,820,000 shares $2.13 billion -1.2%N/A2 $126.54
1/31/202417,020,000 shares $2.06 billion -18.2%N/A2 $120.78
1/15/202420,810,000 shares $2.47 billion +16.5%N/A2.5 $118.63
12/31/202317,870,000 shares $1.95 billion +32.7%N/A2.2 $109.02
12/15/202313,470,000 shares $1.42 billion -19.3%N/A1.7 $105.64
11/30/202316,690,000 shares $1.71 billion -7.4%N/A2.3 $102.48
11/15/202318,020,000 shares $1.83 billion +9.8%N/A2.7 $101.35
10/31/202316,410,000 shares $1.68 billion +3.9%N/A2.5 $102.68
10/15/202315,790,000 shares $1.64 billion +6.5%N/A2.4 $104.01
9/30/202314,830,000 shares $1.53 billion +6.8%N/A2.2 $102.95
9/15/202313,880,000 shares $1.49 billion -5.2%N/A2 $107.47
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8/31/202314,640,000 shares $1.60 billion +1.2%N/A2 $108.98
8/15/202314,460,000 shares $1.57 billion +2.3%N/A1.9 $108.66
7/31/202314,140,000 shares $1.51 billion -21.1%N/A1.9 $106.65
7/15/202317,920,000 shares $1.92 billion +6.3%N/A2.5 $107.34
6/30/202316,860,000 shares $1.94 billion +12.7%N/A2.4 $115.36
6/15/202314,960,000 shares $1.64 billion -4.4%N/A2.1 $109.40
5/31/202315,650,000 shares $1.73 billion -20.2%N/A2.1 $110.41
5/15/202319,620,000 shares $2.28 billion +2.7%N/A2.6 $116.37
4/30/202319,100,000 shares $2.21 billion -10.5%N/A2.5 $115.47
4/15/202321,340,000 shares $2.46 billion -3.3%N/A2.6 $115.31
3/31/202322,070,000 shares $2.35 billion +13.0%N/A2.6 $106.39
3/15/202319,540,000 shares $2.10 billion -4.9%N/A2.3 $107.63
2/28/202320,550,000 shares $2.18 billion +5.6%N/A2.4 $106.24
2/15/202319,470,000 shares $2.10 billion +13.5%N/A2.2 $107.68
1/31/202317,150,000 shares $1.84 billion +5.7%N/A1.9 $107.41
1/15/202316,220,000 shares $1.82 billion -5.8%N/A1.7 $112.25
12/30/202217,210,000 shares $1.91 billion -16.1%N/A1.8 $110.95
12/15/202220,510,000 shares $2.25 billion +4.5%N/A2.2 $109.63
11/30/202219,630,000 shares $2.16 billion +0.8%N/A2.1 $110.12
11/15/202219,470,000 shares $1.94 billion -4.4%N/A2.2 $99.60
10/31/202220,360,000 shares $2.06 billion +5.8%N/A2.4 $101.20
10/15/202219,240,000 shares $1.77 billion -5.7%N/A2.3 $92.18
9/30/202220,400,000 shares $1.76 billion +4.9%N/A2.5 $86.12
9/15/202219,450,000 shares $1.69 billion +0.8%N/A2.2 $86.75
8/31/202219,290,000 shares $1.65 billion -2.4%N/A2 $85.36
8/15/202219,760,000 shares $1.79 billion +17.7%N/A1.9 $90.60
7/31/202216,790,000 shares $1.50 billion -17.4%N/A1.5 $89.34
7/15/202220,330,000 shares $1.93 billion -0.7%N/A1.8 $94.96
6/30/202220,470,000 shares $1.87 billion +2.6%N/A1.7 $91.17
6/15/202219,950,000 shares $1.69 billion -14.6%N/A1.7 $84.63
5/31/202223,350,000 shares $2.15 billion +8.3%N/A2 $92.03
5/15/202221,570,000 shares $1.95 billion +27.0%N/A1.9 $90.41
4/30/202216,980,000 shares $1.51 billion -11.9%0.7%1.5 $88.69
4/15/202219,280,000 shares $1.68 billion +14.4%0.8%1.6 $86.91
3/31/202216,860,000 shares $1.38 billion +1.6%0.7%1.4 $82.05
3/15/202216,590,000 shares $1.30 billion -14.8%0.7%1.4 $78.64
2/28/202219,460,000 shares $1.49 billion +10.3%0.8%1.5 $76.58
2/15/202217,650,000 shares $1.37 billion -12.2%0.7%1.3 $77.81
1/31/202220,090,000 shares $1.64 billion -14.5%0.8%1.4 $81.48
1/15/202223,490,000 shares $1.91 billion +1.4%0.9%1.7 $81.38
12/31/202123,160,000 shares $1.77 billion +8.8%0.9%1.7 $76.64
12/15/202121,290,000 shares $1.60 billion +13.7%0.8%1.3 $75.29
11/30/202118,730,000 shares $1.40 billion -15.6%0.7%1.1 $74.91
11/15/202122,180,000 shares $1.86 billion +6.4%0.9%1.5 $83.69
10/29/202120,840,000 shares $1.83 billion -4.8%N/A1.4 $88.05
10/15/202121,880,000 shares $1.71 billion -3.0%N/A1.6 $78.33
9/30/202122,560,000 shares $1.69 billion -19.9%N/A1.7 $75.11
9/15/202128,180,000 shares $2.05 billion +2.8%N/A2.7 $72.81
8/31/202127,420,000 shares $2.09 billion +2.7%N/A2.7 $76.29
8/13/202126,690,000 shares $2.05 billion +15.2%N/A2.5 $76.72
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7/30/202123,170,000 shares $1.78 billion +4.1%N/A2.1 $76.87
7/15/202122,250,000 shares $1.73 billion -7.0%N/A1.9 $77.90
6/30/202123,930,000 shares $1.86 billion +8.4%N/A2 $77.77
6/15/202122,070,000 shares $1.67 billion +17.2%N/A1.9 $75.70
5/28/202118,830,000 shares $1.43 billion -9.4%N/A1.5 $75.89
5/14/202120,790,000 shares $1.64 billion +1.6%0.8%1.7 $78.69
4/30/202120,470,000 shares $1.51 billion -2.6%0.8%1.6 $73.68
4/15/202121,020,000 shares $1.61 billion -11.5%0.8%1.8 $76.40
3/31/202123,740,000 shares $1.83 billion +30.9%0.9%2 $76.96
3/15/202118,140,000 shares $1.35 billion -11.0%0.7%1.5 $74.60
2/26/202120,380,000 shares $1.52 billion +10.3%0.8%2 $74.62
2/12/202118,470,000 shares $1.38 billion -0.6%0.7%1.9 $74.74
1/29/202118,580,000 shares $1.45 billion +1.9%0.7%2 $77.92
1/15/202118,230,000 shares $1.50 billion +14.2%0.7%2 $82.17
12/31/202015,970,000 shares $1.29 billion +17.5%0.6%1.8 $80.59
12/15/202013,590,000 shares $1.09 billion +0.7%0.5%1.6 $80.32
11/30/202013,500,000 shares $1.08 billion +0.3%N/A1.6 $79.86
11/15/202013,460,000 shares $1.09 billion -8.8%0.5%1.6 $81.09
10/30/202014,750,000 shares $1.12 billion +40.1%0.6%1.8 $75.89
10/15/202010,530,000 shares $847.77 million -4.1%0.4%1.3 $80.51
9/30/202010,980,000 shares $910.79 million +0.1%0.4%1.4 $82.95
9/15/202010,970,000 shares $923.78 million -9.4%0.4%1.4 $84.21
8/31/202012,110,000 shares $1.03 billion +2.6%0.5%1.4 $85.27
8/14/202011,800,000 shares $985.06 million -13.9%0.5%1.3 $83.48
7/31/202013,700,000 shares $1.10 billion -6.4%0.5%1.4 $80.24
7/15/202014,640,000 shares $1.16 billion -1.6%0.6%1.5 $79.44
6/30/202014,880,000 shares $1.15 billion +2.2%0.6%1.4 $77.33
6/15/202014,560,000 shares $1.08 billion -7.9%0.6%1.3 $74.02
5/29/202015,810,000 shares $1.28 billion -16.8%0.6%1.2 $80.72

MRK Short Interest - Frequently Asked Questions

What is Merck & Co., Inc.'s current short interest?

Short interest is the volume of Merck & Co., Inc. shares that have been sold short but have not yet been closed out or covered. As of April 30th, investors have sold 37,140,000 shares of MRK short. 1.48% of Merck & Co., Inc.'s shares are currently sold short. Learn More on Merck & Co., Inc.'s current short interest.

What is a good short interest ratio for Merck & Co., Inc.?

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. MRK shares currently have a short interest ratio of 2.0. Learn More on Merck & Co., Inc.'s short interest ratio.

Which institutional investors are shorting Merck & Co., Inc.?

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Merck & Co., Inc.: Jane Street Group LLC, CTC LLC, Goldman Sachs Group Inc., Parallax Volatility Advisers L.P., Millennium Management LLC, Cubist Systematic Strategies LLC, Caption Management LLC, MAI Capital Management, Twin Tree Management LP, Susquehanna International Group LLP, BNP Paribas Financial Markets, Eisler Capital Management Ltd., PEAK6 LLC, Jane Street Group LLC, Walleye Trading LLC, Walleye Capital LLC, Capital Fund Management S.A., Garda Capital Partners LP, Credit Agricole S A, Maven Securities LTD, Marathon Trading Investment Management LLC, Persistent Asset Partners Ltd, Arrowpoint Investment Partners Singapore Pte. Ltd., Simplex Trading LLC, JPMorgan Chase & Co., Wolverine Asset Management LLC, Citigroup Inc., XY Capital Ltd, Delta Accumulation LLC, Gladius Capital Management LP, Jefferies Financial Group Inc., Readystate Asset Management LP, Allianz Asset Management GmbH, Concurrent Investment Advisors LLC, Fulcrum Asset Management LLP, IMC Chicago LLC, and Insight Advisors LLC PA. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

What is a good short interest percentage for Merck & Co., Inc.?

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. 1.48% of Merck & Co., Inc.'s floating shares are currently sold short.

Is Merck & Co., Inc.'s short interest increasing or decreasing?

Merck & Co., Inc. saw a decrease in short interest in April. As of April 30th, there was short interest totaling 37,140,000 shares, a decrease of 11.4% from the previous total of 41,930,000 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.

How does Merck & Co., Inc.'s short interest compare to its competitors?

1.48% of Merck & Co., Inc.'s shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical preparations" compare to Merck & Co., Inc.: Eli Lilly and Company (0.86%), Johnson & Johnson (0.82%), AbbVie Inc. (1.12%), Pfizer Inc. (2.03%), Bristol-Myers Squibb (1.83%), Zoetis Inc. (2.10%), Royalty Pharma plc (5.42%), Corcept Therapeutics Incorporated (14.06%), Jazz Pharmaceuticals plc (9.09%), Perrigo Company plc (3.80%),

Which stocks are the most shorted right now?

As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks.

What does it mean to sell short Merck & Co., Inc. stock?

Short selling MRK is an investing strategy that aims to generate trading profit from Merck & Co., Inc. as its price is falling. MRK shares are trading down $0.25 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 Merck & Co., Inc.?

A short squeeze for Merck & Co., Inc. occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of MRK, which in turn drives the price of the stock up even further.

How often is Merck & Co., Inc.'s 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 MRK, twice per month. The most recent reporting period available is April, 30 2025.



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This page (NYSE:MRK) was last updated on 5/24/2025 by MarketBeat.com Staff
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