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Stock research / United States / OMER / Short interest

Omeros Corp. short interest

11.4M shares of Omeros were sold short at the 15 October 2026 settlement, near the bottom of its range over the last year (11.4M to 18.1M). Short sellers would need 12.2 days of normal trading to buy them back.

Shares sold short11.4Mat 15 Oct 2026
Change on the settlement before+0.4%-11% over a year
Days to cover12.17at 939K shares a day
Of shares in issue15.85%shares short over shares outstanding
New to this? How to read this page
  1. Short interest is the number of shares investors have borrowed and sold, betting the price will fall, and not yet bought back.
  2. Days to cover is shares short over an average day's trading: how many days it would take short sellers to buy them all back. Above 5 or so is high.
  3. Rising short interest says more investors are betting against the stock. A crowded short can also rise fast if shorts rush to buy back.
  4. Brokers report it twice a month to FINRA, about ten days after each settlement date.
  5. What is short interest?

Short interest, days to cover and the price

Short interest is near the bottom of its range over the last year (11.4M to 18.1M), and the share price moved +82% over the last year.

Shares sold shortDays to coverShare price

Three charts on one timeline. Top: shares sold short at each settlement. Middle: days to cover, taller meaning shorts would need longer to buy back. Bottom: the share price, so you can see whether shorts added as the price fell or rose.

How it compares

every company on the site

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 202611.4M+0.4%939K12.17
    30 September 202611.4M-8.9%1.6M6.95
    15 September 202612.5M-2.1%1.3M9.31
    31 August 202612.8M-12.8%1.7M7.30
    14 August 202614.6M-5.1%3.0M4.91
    31 July 202615.4M+2.2%1.6M9.87
    15 July 202615.1M-0.3%1.3M11.85
    30 June 202615.1M-16.4%2.7M5.61
    15 June 202618.1M+11.3%2.1M8.44
    29 May 202616.3M+2.1%1.8M9.05
    15 May 202615.9M+1.0%1.5M10.84
    30 April 202615.8M-6.6%1.2M13.09
    15 April 202616.9M-1.0%1.5M11.43
    31 March 202617.1M-1.4%909K18.78
    13 March 202617.3M+0.1%780K22.18
    27 February 202617.3M-3.7%816K21.18
    13 February 202618.0M+1.7%1.0M17.68
    30 January 202617.7M+7.5%1.7M10.44
    15 January 202616.4M+24.0%3.5M4.67
    31 December 202513.2M-4.8%5.1M2.60
    15 December 202513.9M+4.3%1.5M9.47
    28 November 202513.4M-0.0%1.7M7.80
    14 November 202513.4M+9.9%1.7M7.79
    31 October 202512.2M-5.7%2.9M4.20
    15 October 202512.9M+1.8%12.2M1.06
    30 September 202512.7M-6.2%1.0M12.38
    15 September 202513.5M+2.7%664K20.33
    29 August 202513.1M-1.9%999K13.16
    15 August 202513.4M+4.8%1.2M11.40
    31 July 202512.8M-6.0%1.7M7.50
    15 July 202513.6M+0.6%949K14.33
    30 June 202513.5M+3.2%964K14.02
    13 June 202513.1M+7.0%837K15.65
    30 May 202512.2M+14.3%1.2M10.48
    15 May 202510.7M+16.8%1.6M6.83
    30 April 20259.2M-14.4%440K20.82
    15 April 202510.7M+14.8%1.2M8.88
    31 March 20259.3M-1.8%499K18.71
    14 March 20259.5M+3.0%521K18.25
    28 February 20259.2M-2.4%567K16.26
    14 February 20259.5M+0.9%406K23.27
    31 January 20259.4M+1.0%464K20.18
    15 January 20259.3M+9.9%653K14.19
    31 December 20248.4M+1.8%1.4M6.00
    13 December 20248.3M-7.1%753K11.01
    29 November 20248.9M-16.8%1.5M5.88
    15 November 202410.7M-10.5%1.7M6.26
    31 October 202412.0M-1.1%187K63.89
    15 October 202412.1M+1.6%213K56.90
    30 September 202411.9M+0.7%250K47.64
    13 September 202411.8M+2.3%271K43.78
    30 August 202411.6M-0.9%233K49.70
    15 August 202411.7M-5.1%481K24.30
    31 July 202412.3M-4.4%428K28.77
    15 July 202412.9M+0.4%236K54.63
    28 June 202412.8M-3.0%341K37.67
    14 June 202413.2M+1.4%501K26.40
    31 May 202413.0M-3.6%323K40.38
    15 May 202413.5M-0.2%236K57.34
    30 April 202413.6M+3.3%258K52.51
    15 April 202413.1M-1.2%493K26.62
    28 March 202413.3M-2.3%324K41.03
    15 March 202413.6M-1.6%479K28.41
    29 February 202413.8M-0.1%534K25.90
    15 February 202413.8M+1.1%727K19.03
    31 January 202413.7M-0.9%679K20.15
    12 January 202413.8M+6.6%707K19.54
    29 December 202313.0M+0.7%800K16.20
    15 December 202312.9M-0.1%852K15.11
    30 November 202312.9M+1.2%699K18.42
    15 November 202312.7M-1.0%614K20.74
    31 October 202312.9M-2.2%1.4M9.13
    13 October 202313.1M+1.4%565K23.27
    29 September 202313.0M+7.1%464K27.94
    15 September 202312.1M-0.0%368K32.87
    31 August 202312.1M+4.4%372K32.54
    15 August 202311.6M+2.0%431K26.88
    31 July 202311.4M-1.7%518K21.95
    14 July 202311.6M+0.4%306K37.78
    30 June 202311.5M+17.8%1.5M7.94
    15 June 20239.8M+6.5%648K15.10
    31 May 20239.2M+1.2%598K15.36
    15 May 20239.1M-3.5%468K19.40
    28 April 20239.4M+4.3%605K15.55
    14 April 20239.0M+1.1%514K17.53
    31 March 20238.9M+5.7%320K27.91
    15 March 20238.4M+8.8%354K23.85
    28 February 20237.8M+4.0%408K18.99
    15 February 20237.5M-12.9%3.5M2.15
    31 January 20238.6M+0.5%352K24.35
    13 January 20238.5M-2.6%383K22.24
    30 December 20228.7M+1.6%1.1M8.08
    15 December 20228.6M-6.4%489K17.61
    30 November 20229.2M+4.1%545K16.90
    15 November 20228.8M-2.0%441K20.02
    31 October 20229.0M-2.8%271K33.26
    14 October 20229.3M-1.5%365K25.39
    30 September 20229.4M-0.6%487K19.33
    15 September 20229.5M-4.8%576K16.44
    31 August 202210.0M-3.9%645K15.42
    15 August 202210.4M-10.9%754K13.73
    29 July 202211.6M-4.2%729K15.94
    15 July 202212.1M-2.2%3.0M4.02
    30 June 202212.4M-6.7%2.1M5.94
    15 June 202213.3M+1.6%1.2M11.31
    31 May 202213.1M+7.1%1.1M11.59
    13 May 202212.2M+8.4%1.1M10.83
    29 April 202211.3M+1.1%701K16.08
    14 April 202211.2M-0.4%505K22.10
    31 March 202211.2M-2.4%448K25.02
    15 March 202211.5M+0.5%647K17.73
    28 February 202211.4M-3.0%433K26.37
    15 February 202211.8M+4.0%577K20.43
    31 January 202211.3M+3.4%848K13.36
    14 January 202211.0M+0.2%591K18.53
    31 December 202110.9M-0.8%840K13.02
    15 December 202111.0M-6.3%2.6M4.27
    30 November 202111.8M+2.4%586K20.07
    15 November 202111.5M-2.3%906K12.68
    29 October 202111.8M+3.7%2.3M5.11
    15 October 202111.3M+14.7%2.7M4.24
    30 September 20219.9M-4.9%556K17.78
    15 September 202110.4M-3.3%393K26.42
    31 August 202110.7M-4.3%372K28.89
    13 August 202111.2M+1.8%463K24.25
    30 July 202111.0M-2.7%292K37.69
    15 July 202111.3M-4.9%444K25.50
    30 June 202111.9M-2.5%498K23.90
    15 June 202112.2M+0.4%474K25.77
    28 May 202112.2M-8.8%949K12.82
    14 May 202113.3M+0.7%318K41.92
    30 April 202113.2M-4.9%540K24.54
    15 April 202113.9M+6.4%549K25.37
    31 March 202113.1M-0.7%475K27.58
    15 March 202113.2M+5.1%726K18.16
    26 February 202112.6M-1.6%561K22.38
    12 February 202112.8M+2.9%798K15.99
    29 January 202112.4M+0.3%946K13.10
    15 January 202112.4M-1.1%645K19.16
    31 December 202012.5M+0.6%670K18.66
    15 December 202012.4M+5.5%1.4M8.98
    30 November 202011.8M-3.2%566K20.82
    13 November 202012.2M-2.0%639K19.02
    30 October 202012.4M-1.4%598K20.76
    15 October 202012.6M+1.8%569K22.13
    30 September 202012.4M-1.5%1.1M10.77
    15 September 202012.5M-2.3%1.7M7.18
    31 August 202012.8M+17.5%1.0M12.41
    14 August 202010.9M+10.4%4.1M2.65
    31 July 20209.9M-3.6%274K36.07
    15 July 202010.3M-5.9%339K30.31
    30 June 202010.9M-0.2%401K27.23
    15 June 202010.9M+0.1%364K30.05
    29 May 202010.9M+0.1%270K40.55
    15 May 202010.9M-2.0%515K21.20
    30 April 202011.1M+1.8%494K22.54
    15 April 202010.9M-1.0%595K18.41
    31 March 202011.1M-0.6%1.1M10.43
    13 March 202011.1M+0.2%1.8M6.33
    28 February 202011.1M+4.2%508K21.87
    14 February 202010.6M-2.6%322K33.08
    31 January 202010.9M-0.9%278K39.36
    15 January 202011.0M+12.5%466K23.66
    31 December 20199.8M-1.6%311K31.50
    13 December 201910.0M-12.3%802K12.43
    29 November 201911.4M-3.6%334K34.05
    15 November 201911.8M+0.5%668K17.64
    31 October 201911.7M-0.4%260K45.14
    15 October 201911.8M+4.0%348K33.85
    30 September 201911.3M+3.0%386K29.37
    13 September 201911.0M-5.7%482K22.83
    30 August 201911.7M-3.5%414K28.16
    15 August 201912.1M-3.4%601K20.12
    31 July 201912.5M+1.7%393K31.88
    15 July 201912.3M+2.9%405K30.44
    28 June 201912.0M+4.7%440K27.23
    14 June 201911.4M+2.1%297K38.44
    31 May 201911.2M-1.3%409K27.39
    15 May 201911.3M+5.7%498K22.76
    30 April 201910.7M-3.9%357K30.09
    15 April 201911.2M-6.1%434K25.73
    29 March 201911.9M+4.0%508K23.42
    15 March 201911.4M-0.0%983K11.63
    28 February 201911.4M+6.8%766K14.93
    15 February 201910.7M-0.2%461K23.23
    31 January 201910.7M+5.2%660K16.25
    15 January 201910.2M-1.6%674K15.13
    31 December 201810.4M+5.4%712K14.56
    14 December 20189.8M-1.4%703K13.99
    30 November 201810.0M-1.8%572K17.46
    15 November 201810.2M+2.9%1.2M8.51
    31 October 20189.9M+2.5%658K15.01
    15 October 20189.6M+29.0%1.8M5.50
    28 September 20187.5M-4.1%692K10.80
    14 September 20187.8M-7.1%651K11.98
    31 August 20188.4M-4.8%567K14.81
    15 August 20188.8M-2.9%692K12.75
    31 July 20189.1M+0.2%499K18.21
    13 July 20189.1M-0.9%438K20.71
    29 June 20189.2M-6.4%630K14.54
    15 June 20189.8M-8.6%720K13.59
    31 May 201810.7M+3.5%1.1M9.94
    15 May 201810.3M-2.0%1.6M6.65
    30 April 201810.6M+10.4%933K11.31
    13 April 20189.6M-2.6%1.2M8.18
    29 March 20189.8M+7.0%2.8M3.47
    15 March 20189.2M+12.9%1.2M7.69
    28 February 20188.1M-8.6%1.6M4.97
    15 February 20188.9M+7.8%1.4M6.54
    31 January 20188.3M+17.3%679K12.15
    12 January 20187.0M+1.1%754K9.32
    29 December 20177.0M354K19.62
    Shares in millions (M) or thousands (K); hold the pointer on a figure for the exact count. FINRA publishes consolidated short interest twice a month, about ten days after each settlement.