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Boston Scientific Corp. short interest

40.7M shares of Boston Scientific were sold short at the 15 October 2026 settlement, near the middle of its range over the last year (18.7M to 57.5M). Short sellers would need 2.6 days of normal trading to buy them back.

Shares sold short40.7Mat 15 Oct 2026
Change on the settlement before-1.7%+107% over a year
Days to cover2.59at 15.7M shares a day
Of shares in issue2.81%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 middle of its range over the last year (18.7M to 57.5M), and the share price moved -56% 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 202640.7M-1.7%15.7M2.59
    30 September 202641.4M-11.0%22.0M1.88
    15 September 202646.5M-3.5%19.7M2.35
    31 August 202648.2M+74.4%21.0M2.29
    14 August 202627.6M+24.0%17.6M1.57
    31 July 202622.3M-21.2%22.0M1.01
    15 July 202628.3M+1.2%16.8M1.69
    30 June 202627.9M-6.1%23.4M1.19
    15 June 202629.8M-48.3%20.6M1.44
    29 May 202657.5M+83.0%25.5M2.25
    15 May 202631.4M+9.7%17.7M1.77
    30 April 202628.6M+11.8%21.1M1.36
    15 April 202625.6M+8.9%14.2M1.80
    31 March 202623.5M-7.5%16.5M1.43
    13 March 202625.4M-3.1%12.9M1.98
    27 February 202626.3M-1.4%13.5M1.94
    13 February 202626.6M-5.8%28.0M1.00
    30 January 202628.3M+20.8%14.4M1.97
    15 January 202623.4M+17.0%10.3M2.27
    31 December 202520.0M+4.5%8.5M2.37
    15 December 202519.1M+2.2%10.1M1.89
    28 November 202518.7M-11.1%9.9M1.89
    14 November 202521.1M+8.3%7.7M2.73
    31 October 202519.5M-0.9%8.5M2.28
    15 October 202519.6M+1.2%9.7M2.03
    30 September 202519.4M+2.0%13.3M1.46
    15 September 202519.0M+0.1%8.1M2.36
    29 August 202519.0M+2.1%5.9M3.22
    15 August 202518.6M+14.3%5.9M3.18
    31 July 202516.3M-16.9%8.2M1.97
    15 July 202519.6M+2.7%6.8M2.87
    30 June 202519.0M+8.9%7.9M2.40
    13 June 202517.5M+2.8%8.2M2.14
    30 May 202517.0M+1.6%7.5M2.27
    15 May 202516.8M+6.6%6.0M2.77
    30 April 202515.7M+8.4%8.0M1.95
    15 April 202514.5M+10.7%12.2M1.19
    31 March 202513.1M+3.8%7.0M1.87
    14 March 202512.6M-1.9%9.5M1.33
    28 February 202512.9M+12.4%8.0M1.60
    14 February 202511.5M+9.6%6.5M1.76
    31 January 202510.4M-27.4%6.3M1.65
    15 January 202514.4M-0.9%5.4M2.69
    31 December 202414.5M+17.8%5.1M2.85
    13 December 202412.3M+0.7%3.7M3.29
    29 November 202412.2M+11.1%5.7M2.17
    15 November 202411.0M-14.6%5.7M1.92
    31 October 202412.9M+14.2%8.3M1.56
    15 October 202411.3M+3.5%5.4M2.09
    30 September 202410.9M-10.5%5.6M1.95
    13 September 202412.2M+10.7%4.7M2.62
    30 August 202411.0M+2.6%4.2M2.62
    15 August 202410.7M-0.6%4.8M2.22
    31 July 202410.8M-6.3%8.3M1.30
    15 July 202411.5M+2.4%4.3M2.69
    28 June 202411.3M-2.5%6.7M1.68
    14 June 202411.5M-13.8%4.3M2.71
    31 May 202413.4M+8.6%6.1M2.21
    15 May 202412.3M-11.6%5.6M2.20
    30 April 202413.9M+5.9%8.4M1.65
    15 April 202413.2M+5.9%5.3M2.47
    28 March 202412.4M+8.2%4.8M2.60
    15 March 202411.5M+21.6%7.1M1.61
    29 February 20249.4M-14.4%6.0M1.57
    15 February 202411.0M+1.5%7.1M1.56
    31 January 202410.9M-5.0%7.7M1.41
    12 January 202411.4M+22.3%6.1M1.88
    29 December 20239.3M-19.7%5.4M1.73
    15 December 202311.6M+26.0%6.0M1.93
    30 November 20239.2M-22.0%6.1M1.52
    15 November 202311.9M+29.7%7.7M1.53
    31 October 20239.1M-32.3%8.3M1.09
    13 October 202313.5M-7.4%9.9M1.36
    29 September 202314.6M+22.7%9.2M1.59
    15 September 202311.9M-2.8%7.1M1.67
    31 August 202312.2M+40.2%8.8M1.38
    15 August 20238.7M+4.7%6.4M1.35
    31 July 20238.3M+13.1%7.7M1.09
    14 July 20237.4M-13.2%5.4M1.36
    30 June 20238.5M-2.8%7.2M1.18
    15 June 20238.7M-29.4%7.2M1.21
    31 May 202312.4M-23.0%9.3M1.33
    15 May 202316.1M-10.7%9.2M1.74
    28 April 202318.0M+16.3%12.9M1.39
    14 April 202315.4M+1.8%8.3M1.87
    31 March 202315.2M+6.0%8.7M1.74
    15 March 202314.3M+12.8%7.7M1.85
    28 February 202312.7M+29.8%8.0M1.58
    15 February 20239.8M-26.1%7.6M1.28
    31 January 202313.2M-15.2%6.6M1.99
    13 January 202315.6M+10.6%7.7M2.02
    30 December 202214.1M-1.7%5.0M2.81
    15 December 202214.3M+8.7%6.6M2.17
    30 November 202213.2M+0.2%4.7M2.81
    15 November 202213.2M-5.3%7.2M1.82
    31 October 202213.9M-8.6%9.9M1.40
    14 October 202215.2M-8.8%6.6M2.29
    30 September 202216.7M+3.6%7.1M2.34
    15 September 202216.1M+5.8%6.4M2.52
    31 August 202215.2M-9.7%6.0M2.53
    15 August 202216.9M+22.6%5.2M3.22
    29 July 202213.8M-14.3%9.7M1.42
    15 July 202216.0M-2.4%5.9M2.70
    30 June 202216.4M-13.5%9.2M1.79
    15 June 202219.0M+25.2%8.6M2.21
    31 May 202215.2M+1.2%8.1M1.88
    13 May 202215.0M+21.5%9.6M1.57
    29 April 202212.4M+3.1%11.0M1.12
    14 April 202212.0M-23.6%7.0M1.71
    31 March 202215.7M+13.4%7.5M2.10
    15 March 202213.8M-21.5%8.8M1.57
    28 February 202217.6M-0.3%8.9M1.98
    15 February 202217.7M-3.7%10.8M1.64
    31 January 202218.3M+19.0%11.5M1.60
    14 January 202215.4M+1.9%7.8M1.96
    31 December 202115.1M+11.6%7.3M2.07
    15 December 202113.6M-7.8%8.3M1.64
    30 November 202114.7M-6.4%9.1M1.62
    15 November 202115.7M-26.0%9.0M1.74
    29 October 202121.2M-6.0%5.8M3.65
    15 October 202122.6M-5.1%5.5M4.07
    30 September 202123.8M+15.8%6.4M3.70
    15 September 202120.5M+2.7%5.6M3.68
    31 August 202120.0M+19.0%6.2M3.20
    13 August 202116.8M+17.8%7.4M2.26
    30 July 202114.3M+15.5%7.3M1.96
    15 July 202112.4M-2.8%5.1M2.42
    30 June 202112.7M-5.2%6.4M1.98
    15 June 202113.4M+17.5%6.1M2.18
    28 May 202111.4M-2.9%5.8M1.95
    14 May 202111.7M-29.3%6.7M1.74
    30 April 202116.6M+13.7%9.6M1.73
    15 April 202114.6M-3.2%4.7M3.09
    31 March 202115.1M-15.1%6.5M2.32
    15 March 202117.8M-0.2%7.7M2.31
    26 February 202117.8M-2.3%8.1M2.20
    12 February 202118.2M+26.8%11.3M1.61
    29 January 202114.4M-6.6%8.8M1.64
    15 January 202115.4M+2.2%10.4M1.49
    31 December 202015.1M-7.8%8.9M1.69
    15 December 202016.3M+33.7%15.5M1.06
    30 November 202012.2M-5.7%14.9M1.00
    13 November 202013.0M+6.5%11.8M1.10
    30 October 202012.2M+5.7%13.1M1.00
    15 October 202011.5M-10.8%6.2M1.85
    30 September 202012.9M-20.5%7.7M1.68
    15 September 202016.2M+9.5%6.7M2.43
    31 August 202014.8M-9.9%5.7M2.60
    14 August 202016.5M+5.2%5.7M2.90
    31 July 202015.7M+5.2%7.9M1.99
    15 July 202014.9M-12.8%8.5M1.75
    30 June 202017.1M-8.4%13.2M1.29
    15 June 202018.6M+9.3%10.0M1.87
    29 May 202017.1M+52.3%13.2M1.29
    15 May 202011.2M+8.7%7.0M1.61
    30 April 202010.3M-14.1%9.9M1.04
    15 April 202012.0M+21.7%12.5M1.00
    31 March 20209.9M-31.1%13.9M1.00
    13 March 202014.3M+25.2%14.9M1.00
    28 February 202011.4M+9.1%9.9M1.15
    14 February 202010.5M-19.2%7.2M1.45
    31 January 202013.0M+11.7%7.4M1.75
    15 January 202011.6M-17.3%7.1M1.64
    31 December 201914.0M-1.6%5.3M2.67
    13 December 201914.3M+12.6%5.4M2.66
    29 November 201912.7M-10.2%5.6M2.27
    15 November 201914.1M-5.2%5.6M2.54
    31 October 201914.9M+15.3%9.2M1.62
    15 October 201912.9M-9.9%9.8M1.32
    30 September 201914.4M+8.1%5.9M2.43
    13 September 201913.3M+7.4%5.9M2.25
    30 August 201912.4M-10.8%4.1M3.01
    15 August 201913.9M+5.7%5.2M2.65
    31 July 201913.1M-14.8%5.9M2.21
    15 July 201915.4M+13.0%6.0M2.57
    28 June 201913.6M-3.6%6.9M1.97
    14 June 201914.1M-3.1%8.9M1.58
    31 May 201914.6M+36.0%7.1M2.05
    15 May 201910.7M-4.7%7.5M1.43
    30 April 201911.3M+25.5%13.8M1.00
    15 April 20199.0M-3.6%5.7M1.57
    29 March 20199.3M+10.9%8.7M1.07
    15 March 20198.4M-1.0%5.6M1.50
    28 February 20198.5M-5.2%7.1M1.19
    15 February 20198.9M-7.2%7.8M1.14
    31 January 20199.6M-19.3%7.1M1.35
    15 January 201911.9M-0.6%7.4M1.60
    31 December 201812.0M+2.6%7.9M1.52
    14 December 201811.7M+11.0%7.2M1.63
    30 November 201810.5M+6.0%8.6M1.22
    15 November 20189.9M-0.6%6.3M1.59
    31 October 201810.0M-19.6%9.2M1.08
    15 October 201812.4M-4.4%7.6M1.64
    28 September 201813.0M+25.0%6.6M1.98
    14 September 201810.4M+11.5%6.8M1.53
    31 August 20189.3M-18.3%5.3M1.76
    15 August 201811.4M-5.6%7.0M1.63
    31 July 201812.1M-3.4%7.4M1.63
    13 July 201812.5M+11.5%4.9M2.55
    29 June 201811.2M+0.9%6.4M1.76
    15 June 201811.1M-22.5%13.9M1.00
    31 May 201814.4M-13.7%5.4M2.64
    15 May 201816.6M+3.0%6.4M2.59
    30 April 201816.2M-8.5%9.1M1.78
    13 April 201817.7M+0.7%7.2M2.45
    29 March 201817.5M+9.7%6.8M2.59
    15 March 201816.0M+7.8%6.7M2.38
    28 February 201814.8M-8.4%6.2M2.40
    15 February 201816.2M+6.7%10.1M1.60
    31 January 201815.2M+7.8%7.7M1.98
    12 January 201814.1M+35.1%11.9M1.18
    29 December 201710.4M6.2M1.67
    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.