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Omeros (OMER) Short Interest Ratio & Short Volume

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$7.02 -0.33 (-4.49%)
Closing price 04:00 PM Eastern
Extended Trading
$7.16 +0.14 (+1.99%)
As of 06:04 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.

Omeros Short Interest Data

Omeros (OMER) has a short interest of 10.71 million shares, representing 19.31% of the float (the number of shares available for trading by the public). This marks a 14.79% increase in short interest from the previous month. The short interest ratio (days to cover) is 17.4, indicating that it would take 17.4 days of the average trading volume of 582,435 shares to cover all short positions.

Current Short Interest
10,710,000 shares
Previous Short Interest
9,330,000 shares
Change Vs. Previous Month
+14.79%
Dollar Volume Sold Short
$73.58 million
Short Interest Ratio
17.4 Days to Cover
Last Record Date
April 15, 2025
Outstanding Shares
58,064,000 shares
Float Size
55,470,000 shares
Short Percent of Float
19.31%
Today's Trading Volume
542,628 shares
Average Trading Volume
582,435 shares
Today's Volume Vs. Average
93%
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OMER Short Interest Over Time

OMER Days to Cover Over Time

OMER Percentage of Float Shorted Over Time

Omeros Short Interest History

Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
4/15/202510,710,000 shares $73.58 million +14.8%19.3%17.4 $6.87
3/31/20259,330,000 shares $76.69 million -1.8%16.8%15.2 $8.22
3/15/20259,500,000 shares $79.99 million +2.9%17.2%14.2 $8.42
2/28/20259,230,000 shares $77.62 million -2.3%16.7%13.1 $8.41
2/15/20259,450,000 shares $86.75 million +1.0%17.1%11.4 $9.18
1/31/20259,360,000 shares $80.68 million +1.0%16.9%8.7 $8.62
1/15/20259,270,000 shares $82.50 million +9.8%16.7%8.9 $8.90
12/31/20248,440,000 shares $83.39 million +1.8%15.3%8.6 $9.88
12/15/20248,290,000 shares $63.25 million -7.1%15.0%9.3 $7.63
11/30/20248,920,000 shares $101.24 million -16.9%16.1%12.7 $11.35
11/15/202410,730,000 shares $72.43 million -10.4%19.4%16.8 $6.75
10/31/202411,980,000 shares $48.40 million -1.2%21.6%49.9 $4.04
10/15/202412,120,000 shares $49.81 million +1.6%21.9%41.9 $4.11
9/30/202411,930,000 shares $47.36 million +0.8%21.6%36 $3.97
9/15/202411,840,000 shares $46.65 million +2.3%21.4%35.8 $3.94
8/31/202411,580,000 shares $48.75 million -0.9%20.9%32.3 $4.21
8/15/202411,690,000 shares $49.62 million -5.1%21.1%31.1 $4.25
7/31/202412,320,000 shares $66.40 million -4.4%22.3%31.6 $5.39
7/15/202412,880,000 shares $57.19 million +0.4%23.3%38.6 $4.44
6/30/202412,830,000 shares $52.09 million -3.1%23.2%39.3 $4.06
6/15/202413,240,000 shares $53.75 million +1.5%23.9%37.3 $4.06
5/31/202413,050,000 shares $43.85 million -3.6%23.6%36.5 $3.36
5/15/202413,540,000 shares $56.46 million -0.2%24.4%36.6 $4.17
4/30/202413,570,000 shares $42.75 million +3.4%24.4%31 $3.15
4/15/202413,130,000 shares $44.38 million -1.2%23.6%25.7 $3.38
3/31/202413,290,000 shares $45.85 million -2.3%23.9%23.1 $3.45
3/15/202413,600,000 shares $49.64 million -1.6%22.6%21.5 $3.65
2/29/202413,820,000 shares $62.19 million -0.1%22.9%20.2 $4.50
2/15/202413,830,000 shares $67.63 million +1.0%22.9%18.5 $4.89
1/31/202413,690,000 shares $44.36 million -0.9%22.7%19.1 $3.24
1/15/202413,820,000 shares $48.78 million +6.6%23.0%18.6 $3.53
12/31/202312,960,000 shares $42.38 million +0.7%21.5%15 $3.27
12/15/202312,870,000 shares $36.55 million -0.1%21.4%15.5 $2.84
11/30/202312,880,000 shares $28.21 million +1.2%21.4%16.7 $2.19
11/15/202312,730,000 shares $19.22 million -1.0%21.2%18.8 $1.51
10/31/202312,860,000 shares $15.30 million -2.1%21.3%19.9 $1.19
10/15/202313,140,000 shares $29.83 million +1.3%21.8%20.8 $2.27
9/30/202312,970,000 shares $37.87 million +7.2%21.5%29.8 $2.92
9/15/202312,100,000 shares $37.63 million -0.1%20.1%27.5 $3.11
8/31/202312,110,000 shares $41.90 million +4.5%20.1%20.9 $3.46
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8/15/202311,590,000 shares $43.23 million +1.9%19.2%18.3 $3.73
7/31/202311,370,000 shares $49.46 million -1.7%18.9%17.3 $4.35
7/15/202311,570,000 shares $59.70 million +0.4%19.2%17.1 $5.16
6/30/202311,520,000 shares $62.67 million +17.8%19.1%16.5 $5.44
6/15/20239,780,000 shares $58.39 million +6.4%16.2%14.4 $5.97
5/31/20239,190,000 shares $56.98 million +1.2%15.2%18.1 $6.20
5/15/20239,080,000 shares $48.94 million -3.5%15.1%19.5 $5.39
4/30/20239,410,000 shares $54.58 million +4.3%15.6%9.9 $5.80
4/15/20239,020,000 shares $57.28 million +1.1%14.9%9.7 $6.35
3/31/20238,920,000 shares $41.48 million +5.7%14.8%10 $4.65
3/15/20238,440,000 shares $31.73 million +8.8%14.0%8.6 $3.76
2/28/20237,760,000 shares $29.26 million +4.0%12.9%7.7 $3.77
2/15/20237,460,000 shares $34.76 million -13.0%12.4%7 $4.66
1/31/20238,570,000 shares $24.85 million +0.6%14.2%8.1 $2.90
1/15/20238,520,000 shares $24.71 million -2.6%14.1%16.2 $2.90
12/30/20228,750,000 shares $19.78 million +1.6%14.6%16.8 $2.26
12/15/20228,610,000 shares $16.88 million -6.4%14.3%17.2 $1.96
11/30/20229,200,000 shares $19.69 million +4.1%15.3%21.1 $2.14
11/15/20228,840,000 shares $23.78 million -2.0%14.7%20 $2.69
10/31/20229,020,000 shares $29.86 million -2.8%15.0%18.5 $3.31
10/15/20229,280,000 shares $31.64 million -1.5%15.4%16.7 $3.41
9/30/20229,420,000 shares $29.67 million -0.6%15.7%15 $3.15
9/15/20229,480,000 shares $37.83 million -4.8%15.8%8.2 $3.99
8/31/20229,960,000 shares $40.14 million -3.8%16.6%7.7 $4.03
8/15/202210,350,000 shares $69.76 million -10.9%17.2%7.2 $6.74
7/31/202211,620,000 shares $57.87 million -4.2%19.3%7.9 $4.98
7/15/202212,130,000 shares $49.13 million -2.2%20.2%8.2 $4.05
6/30/202212,400,000 shares $34.10 million -6.7%20.6%8.4 $2.75
6/15/202213,290,000 shares $27.24 million +1.5%22.1%12.4 $2.05
5/31/202213,090,000 shares $32.46 million +7.0%21.8%16.1 $2.48
5/15/202212,230,000 shares $39.14 million +8.5%20.3%17.5 $3.20
4/30/202211,270,000 shares $39.11 million +1.1%18.7%18.8 $3.47
4/15/202211,150,000 shares $57.31 million -0.5%18.5%18.9 $5.14
3/31/202211,200,000 shares $67.31 million -2.4%18.6%19 $6.01
3/15/202211,470,000 shares $66.64 million +0.4%19.1%17.9 $5.81
2/28/202211,420,000 shares $82.22 million -3.1%19.0%16.4 $7.20
2/15/202211,780,000 shares $81.40 million +4.1%19.7%11.9 $6.91
1/31/202211,320,000 shares $67.92 million +3.4%18.9%10.8 $6.00
1/15/202210,950,000 shares $63.18 million +0.2%18.3%10.3 $5.77
12/31/202110,930,000 shares $70.28 million -0.7%18.2%8.3 $6.43
12/15/202111,010,000 shares $80.37 million -6.4%18.4%6.8 $7.30
11/30/202111,760,000 shares $84.67 million +2.4%19.6%7.5 $7.20
11/15/202111,480,000 shares $95.17 million -2.3%19.2%9.6 $8.29
10/29/202111,750,000 shares $73.67 million +3.7%19.6%10.3 $6.27
10/15/202111,330,000 shares $87.58 million +14.7%18.9%10.4 $7.73
9/30/20219,880,000 shares $136.25 million -4.8%16.5%13.1 $13.79
9/15/202110,380,000 shares $161.41 million -3.4%17.3%25.8 $15.55
8/31/202110,740,000 shares $175.06 million -4.3%17.9%25.9 $16.30
8/13/202111,220,000 shares $172.00 million +1.8%18.7%25.7 $15.33
7/30/202111,020,000 shares $159.79 million -2.7%18.4%20.8 $14.50
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7/15/202111,330,000 shares $156.69 million -4.9%19.0%21 $13.83
6/30/202111,910,000 shares $176.74 million -2.5%19.9%21 $14.84
6/15/202112,220,000 shares $182.08 million +0.4%20.5%21 $14.90
5/28/202112,170,000 shares $184.86 million -8.8%20.4%20.9 $15.19
5/14/202113,350,000 shares $244.71 million +0.8%N/A20.5 $18.33
4/30/202113,250,000 shares $237.31 million -4.9%N/A22.1 $17.91
4/15/202113,930,000 shares $244.61 million +6.3%N/A20.8 $17.56
3/31/202113,100,000 shares $232.66 million -0.8%N/A17.2 $17.76
3/15/202113,200,000 shares $262.42 million +5.2%N/A16.8 $19.88
2/26/202112,550,000 shares $241.46 million -1.7%N/A13.9 $19.24
2/12/202112,760,000 shares $277.27 million +2.9%N/A14.7 $21.73
1/29/202112,400,000 shares $240.93 million +0.3%N/A13.6 $19.43
1/15/202112,360,000 shares $222.36 million -1.1%N/A14.4 $17.99
12/31/202012,500,000 shares $181.75 million +0.6%N/A16 $14.54
12/15/202012,430,000 shares $188.81 million +5.5%N/A14.5 $15.19
11/30/202011,780,000 shares $138.30 million -3.1%N/A12.5 $11.74
11/15/202012,160,000 shares $141.30 million -2.0%N/A12.2 $11.62
10/30/202012,410,000 shares $130.31 million -1.4%N/A9.9 $10.50
10/15/202012,590,000 shares $135.47 million +1.9%N/A7.9 $10.76
9/30/202012,360,000 shares $124.90 million -1.4%N/A8 $10.11
9/15/202012,540,000 shares $153.87 million -2.3%N/A8.6 $12.27
8/31/202012,840,000 shares $153.44 million +17.5%N/A9.7 $11.95
8/14/202010,930,000 shares $148.21 million +10.4%N/A10.1 $13.56
7/31/20209,900,000 shares $127.02 million -3.6%N/A12.7 $12.83
7/15/202010,270,000 shares $146.66 million -6.0%N/A24.4 $14.28
6/30/202010,920,000 shares $160.74 million -0.2%N/A24.1 $14.72
6/15/202010,940,000 shares $162.46 million No ChangeN/A21 $14.85
5/29/202010,940,000 shares $162.79 million +0.2%N/A16.8 $14.88
5/15/202010,920,000 shares $153.86 million -2.0%N/A12.6 $14.09

OMER Short Interest - Frequently Asked Questions

What is Omeros' current short interest?

Short interest is the volume of Omeros shares that have been sold short but have not yet been covered or closed out. As of April 15th, investors have sold 10,710,000 shares of OMER short. 19.31% of Omeros' shares are currently sold short. Learn More on Omeros' current short interest.

What is a good short interest ratio for Omeros?

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. OMER shares currently have a short interest ratio of 17.0. Learn More on Omeros's short interest ratio.

Which institutional investors are shorting Omeros?

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Omeros: Jefferies Financial Group Inc., Wolverine Trading LLC, Sculptor Capital LP, Jefferies Financial Group Inc., Group One Trading LLC, First Sabrepoint Capital Management LP, DeepCurrents Investment Group LLC, Citadel Advisors LLC, Jane Street Group LLC, Susquehanna International Group LLP, Concourse Financial Group Securities Inc., Walleye Capital LLC, and Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

What is a good short interest percentage for Omeros?

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. 19.31% of Omeros' floating shares are currently sold short.

Is Omeros' short interest increasing or decreasing?

Omeros saw a increase in short interest in April. As of April 15th, there was short interest totaling 10,710,000 shares, an increase of 14.8% from the previous total of 9,330,000 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 Omeros' float size?

Omeros currently has issued a total of 58,064,000 shares. Some of Omeros' 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. Omeros currently has a public float of 55,470,000 shares.

How does Omeros' short interest compare to its competitors?

19.31% of Omeros' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical preparations" compare to Omeros: Pacira BioSciences, Inc. (14.02%), Nektar Therapeutics (4.54%), Assembly Biosciences, Inc. (0.47%), Cumberland Pharmaceuticals Inc. (1.82%), Eli Lilly and Company (0.76%), Johnson & Johnson (0.87%), AbbVie Inc. (0.96%), Merck & Co., Inc. (1.67%), Pfizer Inc. (1.90%), Bristol-Myers Squibb (1.48%),

Which stocks are the most shorted right now?

As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($21.71 billion), iShares 20+ Year Treasury Bond ETF ($9.48 billion), Strategy Incorporated ($8.92 billion), Charter Communications, Inc. ($3.86 billion), Apollo Global Management, Inc. ($3.86 billion), Capital One Financial Co. ($3.72 billion), Super Micro Computer, Inc. ($3.47 billion), AppLovin Co. ($2.64 billion), VanEck Semiconductor ETF ($2.46 billion), and The Kroger Co. ($2.33 billion). View all of the most shorted stocks.

What does it mean to sell short Omeros stock?

Short selling OMER is an investing strategy that aims to generate trading profit from Omeros as its price is falling. OMER shares are trading down $0.33 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 Omeros?

A short squeeze for Omeros 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 OMER, which in turn drives the price of the stock up even further.

How often is Omeros' 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 OMER, twice per month. The most recent reporting period available is April, 15 2025.




This page (NASDAQ:OMER) was last updated on 5/1/2025 by MarketBeat.com Staff
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