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Stock research / United States / ILMN / Short interest

Illumina, Inc. short interest

7.9M shares of Illumina were sold short at the 15 October 2026 settlement, near the middle of its range over the last year (6.5M to 10.6M). Short sellers would need 2.9 days of normal trading to buy them back.

Shares sold short7.9Mat 15 Oct 2026
Change on the settlement before-16.7%+18% over a year
Days to cover2.94at 2.7M shares a day
Of shares in issue5.22%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 (6.5M to 10.6M), and the share price moved +129% 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 20267.9M-16.7%2.7M2.94
    30 September 20269.5M-10.5%5.8M1.63
    15 September 202610.6M+8.9%1.9M5.60
    31 August 20269.7M+2.7%1.9M5.15
    14 August 20269.5M+17.5%2.0M4.83
    31 July 20268.1M-7.9%1.8M4.51
    15 July 20268.8M+15.7%2.0M4.39
    30 June 20267.6M-17.8%2.1M3.68
    15 June 20269.2M+19.2%2.0M4.53
    29 May 20267.7M+2.9%1.7M4.67
    15 May 20267.5M+14.6%1.9M4.02
    30 April 20266.5M-8.8%1.4M4.68
    15 April 20267.2M+3.2%1.4M5.22
    31 March 20267.0M-3.8%1.4M4.87
    13 March 20267.2M+0.9%1.6M4.51
    27 February 20267.2M-9.6%2.4M2.94
    13 February 20267.9M-4.6%2.7M2.97
    30 January 20268.3M+28.6%2.1M3.96
    15 January 20266.5M-5.2%1.9M3.39
    31 December 20256.8M-8.2%1.4M4.75
    15 December 20257.4M+5.0%1.5M4.80
    28 November 20257.1M+7.8%1.8M3.84
    14 November 20256.5M-2.7%1.9M3.49
    31 October 20256.7M+0.7%2.0M3.43
    15 October 20256.7M+1.1%1.7M4.04
    30 September 20256.6M-10.0%1.8M3.76
    15 September 20257.3M+1.7%1.3M5.67
    29 August 20257.2M-4.0%1.4M5.32
    15 August 20257.5M-2.8%2.0M3.83
    31 July 20257.7M-2.0%2.3M3.40
    15 July 20257.9M+12.9%2.2M3.56
    30 June 20257.0M+11.0%2.6M2.71
    13 June 20256.3M+14.9%1.9M3.36
    30 May 20255.5M-10.2%2.2M2.44
    15 May 20256.1M+9.7%2.4M2.57
    30 April 20255.6M+1.2%1.6M3.44
    15 April 20255.5M-2.7%2.9M1.88
    31 March 20255.7M-3.2%2.0M2.78
    14 March 20255.8M-10.2%2.6M2.22
    28 February 20256.5M+1.1%3.3M1.98
    14 February 20256.4M-1.1%3.8M1.70
    31 January 20256.5M+9.0%1.6M4.17
    15 January 20256.0M+18.4%1.7M3.42
    31 December 20245.0M-22.6%2.5M2.01
    13 December 20246.5M-9.7%1.6M4.06
    29 November 20247.2M+10.2%2.1M3.36
    15 November 20246.5M-2.7%2.6M2.55
    31 October 20246.7M-0.8%1.2M5.54
    15 October 20246.8M+23.3%2.2M3.08
    30 September 20245.5M+12.6%1.6M3.48
    13 September 20244.9M+9.1%1.4M3.47
    30 August 20244.5M+6.2%1.4M3.24
    15 August 20244.2M-9.6%2.3M1.87
    31 July 20244.7M-2.4%1.5M3.16
    15 July 20244.8M-4.9%1.9M2.57
    28 June 20245.0M-2.2%6.5M1.00
    14 June 20245.1M-11.8%3.0M1.69
    31 May 20245.8M+7.7%1.7M3.36
    15 May 20245.4M+13.5%1.9M2.84
    30 April 20244.8M-9.8%1.3M3.71
    15 April 20245.3M-0.2%1.6M3.29
    28 March 20245.3M+1.4%1.6M3.35
    15 March 20245.2M+5.3%1.6M3.27
    29 February 20244.9M+3.3%1.5M3.24
    15 February 20244.8M+2.5%1.9M2.46
    31 January 20244.7M+0.4%1.7M2.75
    12 January 20244.7M+9.2%2.2M2.10
    29 December 20234.3M+5.7%2.1M2.05
    15 December 20234.0M-19.2%2.9M1.40
    30 November 20235.0M-7.8%3.9M1.27
    15 November 20235.4M+4.7%3.1M1.74
    31 October 20235.2M-5.8%1.8M2.92
    13 October 20235.5M-2.6%1.4M4.01
    29 September 20235.6M-5.3%2.0M2.89
    15 September 20236.0M+5.6%1.9M3.06
    31 August 20235.6M-2.6%1.1M5.18
    15 August 20235.8M-3.1%1.5M3.90
    31 July 20236.0M-16.4%1.8M3.28
    14 July 20237.1M+3.3%1.1M6.54
    30 June 20236.9M+23.7%2.1M3.30
    15 June 20235.6M+12.1%1.4M3.92
    31 May 20235.0M+16.2%1.5M3.37
    15 May 20234.3M-4.4%1.2M3.48
    28 April 20234.5M-2.3%1.1M4.14
    14 April 20234.6M+1.4%1.1M4.35
    31 March 20234.5M-7.6%1.0M4.38
    15 March 20234.9M+13.0%1.7M2.82
    28 February 20234.3M+6.3%1.1M3.96
    15 February 20234.1M+4.5%1.4M2.83
    31 January 20233.9M+2.7%964K4.06
    13 January 20233.8M-1.2%1.7M2.24
    30 December 20223.9M-3.9%1.1M3.48
    15 December 20224.0M-5.3%1.1M3.49
    30 November 20224.2M-3.2%962K4.40
    15 November 20224.4M-9.2%1.4M3.11
    31 October 20224.8M-3.3%1.5M3.19
    14 October 20225.0M+15.1%2.0M2.51
    30 September 20224.3M-0.9%2.0M2.16
    15 September 20224.4M+0.3%1.5M2.93
    31 August 20224.4M+24.5%1.5M2.91
    15 August 20223.5M+17.4%1.8M1.89
    29 July 20223.0M-16.5%1.1M2.76
    15 July 20223.6M-7.9%1.2M3.09
    30 June 20223.9M+13.0%2.1M1.81
    15 June 20223.4M+38.6%1.5M2.28
    31 May 20222.5M+22.4%1.2M2.09
    13 May 20222.0M+9.4%1.6M1.25
    29 April 20221.8M+16.5%764K2.42
    14 April 20221.6M-3.5%756K2.10
    31 March 20221.6M-3.6%746K2.20
    15 March 20221.7M-2.3%780K2.19
    28 February 20221.7M+6.6%949K1.84
    15 February 20221.6M+3.3%968K1.69
    31 January 20221.6M-10.9%1.0M1.56
    14 January 20221.8M+4.4%1.4M1.25
    31 December 20211.7M-0.2%863K1.97
    15 December 20211.7M-5.5%1.2M1.44
    30 November 20211.8M+4.7%903K2.00
    15 November 20211.7M-16.5%809K2.13
    29 October 20212.1M+12.2%648K3.19
    15 October 20211.8M-11.9%940K1.96
    30 September 20212.1M-13.8%965K2.17
    15 September 20212.4M+10.6%637K3.81
    31 August 20212.2M+0.4%964K2.28
    13 August 20212.2M+1.3%563K3.88
    30 July 20212.2M-9.4%503K4.29
    15 July 20212.4M-7.8%570K4.17
    30 June 20212.6M-5.8%578K4.47
    15 June 20212.7M-3.9%667K4.11
    28 May 20212.8M-3.9%872K3.27
    14 May 20213.0M+3.7%690K4.29
    30 April 20212.9M-1.4%725K3.94
    15 April 20212.9M-7.6%993K2.92
    31 March 20213.1M-3.8%1.2M2.53
    15 March 20213.3M-3.9%827K3.94
    26 February 20213.4M-10.7%1.0M3.38
    12 February 20213.8M-8.6%852K4.45
    29 January 20214.2M-19.1%1.2M3.43
    15 January 20215.1M+3.0%1.0M5.08
    31 December 20205.0M-4.6%805K6.19
    15 December 20205.2M+7.4%1.1M4.65
    30 November 20204.9M+9.9%921K5.28
    13 November 20204.4M+8.9%1.1M3.98
    30 October 20204.1M-15.7%926K4.39
    15 October 20204.8M+23.4%1.4M3.53
    30 September 20203.9M-3.2%3.4M1.16
    15 September 20204.0M+3.1%766K5.27
    31 August 20203.9M+10.5%577K6.78
    14 August 20203.5M+1.7%1.1M3.12
    31 July 20203.5M+5.3%721K4.83
    15 July 20203.3M-4.7%706K4.68
    30 June 20203.5M+12.3%750K4.62
    15 June 20203.1M+4.5%789K3.91
    29 May 20203.0M-2.6%1.1M2.74
    15 May 20203.0M-7.3%792K3.83
    30 April 20203.3M-0.0%1.0M3.25
    15 April 20203.3M+21.6%1.2M2.78
    31 March 20202.7M-20.9%1.7M1.56
    13 March 20203.4M-0.6%1.4M2.52
    28 February 20203.4M+4.8%1.4M2.38
    14 February 20203.3M-4.2%1.5M2.24
    31 January 20203.4M+5.9%1.1M3.00
    15 January 20203.2M-10.7%1.1M3.03
    31 December 20193.6M+8.3%759K4.76
    13 December 20193.3M-4.2%677K4.92
    29 November 20193.5M+1.6%786K4.42
    15 November 20193.4M-8.9%739K4.63
    31 October 20193.8M+7.5%1.3M2.95
    15 October 20193.5M+4.1%796K4.39
    30 September 20193.4M+20.5%929K3.61
    13 September 20192.8M-27.7%1.5M1.83
    30 August 20193.9M-6.4%707K5.44
    15 August 20194.1M+9.8%942K4.36
    31 July 20193.7M+25.9%1.4M2.64
    15 July 20193.0M+17.5%1.9M1.54
    28 June 20192.5M+1.3%948K2.67
    14 June 20192.5M-12.4%823K3.04
    31 May 20192.9M-4.6%767K3.72
    15 May 20193.0M+11.9%959K3.11
    30 April 20192.7M-4.9%1.2M2.16
    15 April 20192.8M-0.3%939K2.99
    29 March 20192.8M+9.6%763K3.69
    15 March 20192.6M-5.9%949K2.71
    28 February 20192.7M-1.5%859K3.18
    15 February 20192.8M+14.6%866K3.20
    31 January 20192.4M-8.0%1.2M2.07
    15 January 20192.6M+1.2%1.1M2.31
    31 December 20182.6M-7.0%1.2M2.11
    14 December 20182.8M+8.2%1.1M2.62
    30 November 20182.6M+1.7%1.0M2.56
    15 November 20182.5M-0.1%1.1M2.21
    31 October 20182.5M+5.6%1.4M1.76
    15 October 20182.4M-0.4%1.2M1.93
    28 September 20182.4M+4.3%661K3.65
    14 September 20182.3M-10.5%693K3.34
    31 August 20182.6M+14.4%975K2.65
    15 August 20182.3M+10.4%1.0M2.26
    31 July 20182.0M-6.3%1.1M1.83
    13 July 20182.2M+6.0%768K2.84
    29 June 20182.1M-8.3%965K2.13
    15 June 20182.2M-0.3%690K3.25
    31 May 20182.3M-10.3%624K3.61
    15 May 20182.5M+15.8%737K3.40
    30 April 20182.2M-5.3%1.2M1.75
    13 April 20182.3M-6.6%663K3.45
    29 March 20182.4M-1.8%793K3.09
    15 March 20182.5M+12.9%724K3.44
    28 February 20182.2M+0.0%606K3.64
    15 February 20182.2M+8.8%1.2M1.84
    31 January 20182.0M-14.5%902K2.25
    12 January 20182.4M+8.2%1.2M2.03
    29 December 20172.2M624K3.51
    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.