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Stock research / United States / IDYA / Short interest

Ideaya Biosciences, Inc. short interest

9.1M shares of Ideaya Biosciences were sold short at the 15 October 2026 settlement, the fewest since 15 Jan 2026. Short sellers would need 12.0 days of normal trading to buy them back.

Shares sold short9.1Mat 15 Oct 2026
Change on the settlement before-1.1%+7% over a year
Days to cover12.03at 755K shares a day
Of shares in issue9.42%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 the fewest since 15 Jan 2026, and the share price moved +18% 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

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    Every settlement since 31 May 2019 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20269.1M-1.1%755K12.03
    30 September 20269.2M-7.5%1.1M8.43
    15 September 20269.9M-1.7%575K17.26
    31 August 202610.1M-2.8%827K12.21
    14 August 202610.4M+2.8%630K16.51
    31 July 202610.1M+5.6%767K13.19
    15 July 20269.6M-7.4%1.1M8.61
    30 June 202610.3M-2.8%1.7M6.08
    15 June 202610.6M-6.3%1.4M7.53
    29 May 202611.3M-3.1%694K16.34
    15 May 202611.7M-0.0%838K13.96
    30 April 202611.7M+10.8%1.0M11.18
    15 April 202610.6M+8.2%2.3M4.53
    31 March 20269.8M+0.4%1.0M9.35
    13 March 20269.7M-0.1%855K11.38
    27 February 20269.7M-2.6%768K12.67
    13 February 202610.0M+7.3%868K11.52
    30 January 20269.3M+7.0%804K11.59
    15 January 20268.7M+5.6%1.0M8.38
    31 December 20258.2M+14.2%871K9.47
    15 December 20257.2M-6.4%965K7.49
    28 November 20257.7M-3.9%844K9.14
    14 November 20258.0M+2.2%943K8.52
    31 October 20257.9M-7.3%1.4M5.71
    15 October 20258.5M+1.0%1.2M7.37
    30 September 20258.4M-11.3%1.3M6.52
    15 September 20259.5M-6.2%1.7M5.66
    29 August 202510.1M+4.6%767K13.16
    15 August 20259.6M-4.7%942K10.25
    31 July 202510.1M-13.8%1.1M9.00
    15 July 202511.7M+1.3%829K14.16
    30 June 202511.6M+2.1%1.1M10.14
    13 June 202511.3M+8.1%1.2M9.85
    30 May 202510.5M-1.8%1.6M6.70
    15 May 202510.7M-1.8%1.3M8.23
    30 April 202510.9M+1.9%1.5M7.48
    15 April 202510.7M+7.3%2.0M5.21
    31 March 20259.9M+0.6%938K10.60
    14 March 20259.9M+7.6%935K10.57
    28 February 20259.2M+3.3%905K10.16
    14 February 20258.9M-7.1%840K10.59
    31 January 20259.6M-0.9%937K10.22
    15 January 20259.7M-3.3%830K11.66
    31 December 202410.0M+10.2%969K10.31
    13 December 20249.1M+1.6%747K12.16
    29 November 20248.9M-11.2%1.4M6.38
    15 November 202410.1M+8.1%803K12.53
    31 October 20249.3M-3.1%670K13.89
    15 October 20249.6M-20.4%765K12.56
    30 September 202412.1M+3.2%1.1M10.74
    13 September 202411.7M+2.5%455K25.74
    30 August 202411.4M-1.0%407K28.09
    15 August 202411.5M-0.8%618K18.67
    31 July 202411.6M-2.2%752K15.48
    15 July 202411.9M+1.6%1.7M6.89
    28 June 202411.7M+6.1%1.2M9.94
    14 June 202411.0M+2.9%784K14.09
    31 May 202410.7M-3.2%1.1M9.69
    15 May 202411.1M+3.8%568K19.51
    30 April 202410.7M+8.6%704K15.17
    15 April 20249.8M+4.5%486K20.22
    28 March 20249.4M+6.7%717K13.13
    15 March 20248.8M+3.0%759K11.62
    29 February 20248.6M+2.7%782K10.95
    15 February 20248.3M+4.0%808K10.32
    31 January 20248.0M+1.4%1.0M7.81
    12 January 20247.9M-5.5%1.5M5.22
    29 December 20238.4M-0.4%776K10.78
    15 December 20238.4M-2.9%1.2M7.05
    30 November 20238.6M+2.5%754K11.46
    15 November 20238.4M+8.9%822K10.26
    31 October 20237.7M+15.6%1.2M6.50
    13 October 20236.7M-10.4%634K10.56
    29 September 20237.5M+5.2%439K17.02
    15 September 20237.1M+4.3%620K11.46
    31 August 20236.8M+4.4%526K12.96
    15 August 20236.5M+8.6%564K11.57
    31 July 20236.0M-1.7%351K17.12
    14 July 20236.1M+1.6%287K21.33
    30 June 20236.0M+25.6%889K6.77
    15 June 20234.8M+3.7%401K11.96
    31 May 20234.6M+0.8%602K7.67
    15 May 20234.6M+9.0%759K6.04
    28 April 20234.2M-2.7%1.7M2.53
    14 April 20234.3M-1.7%360K11.99
    31 March 20234.4M+1.9%417K10.54
    15 March 20234.3M+1.9%343K12.59
    28 February 20234.2M+1.9%243K17.45
    15 February 20234.2M-2.4%345K12.05
    31 January 20234.3M-4.4%450K9.46
    13 January 20234.4M-2.0%349K12.75
    30 December 20224.5M+1.9%524K8.67
    15 December 20224.5M-2.9%386K11.54
    30 November 20224.6M-6.1%368K12.48
    15 November 20224.9M+1.2%660K7.41
    31 October 20224.8M+0.9%322K15.01
    14 October 20224.8M+12.7%538K8.89
    30 September 20224.2M+17.0%664K6.40
    15 September 20223.6M+3.9%787K4.61
    31 August 20223.5M-1.4%436K8.01
    15 August 20223.5M-2.3%389K9.12
    29 July 20223.6M-2.2%197K18.44
    15 July 20223.7M-3.0%262K14.14
    30 June 20223.8M-4.6%396K9.67
    15 June 20224.0M-5.3%268K14.96
    31 May 20224.2M+0.4%265K15.99
    13 May 20224.2M+11.6%356K11.85
    29 April 20223.8M+5.2%313K12.05
    14 April 20223.6M+0.9%262K13.68
    31 March 20223.6M-5.9%348K10.22
    15 March 20223.8M+0.2%707K5.35
    28 February 20223.8M-1.5%296K12.76
    15 February 20223.8M+8.1%231K16.61
    31 January 20223.5M+10.8%302K11.75
    14 January 20223.2M+10.1%340K9.43
    31 December 20212.9M+17.5%375K7.76
    15 December 20212.5M-1.4%305K8.10
    30 November 20212.5M-0.0%439K5.72
    15 November 20212.5M+2.4%223K11.28
    29 October 20212.5M+6.4%188K13.02
    15 October 20212.3M-11.4%351K6.57
    30 September 20212.6M+31.1%476K5.46
    15 September 20212.0M-5.9%402K4.94
    31 August 20212.1M-7.4%184K11.43
    13 August 20212.3M-1.3%245K9.31
    30 July 20212.3M+21.8%291K7.92
    15 July 20211.9M+24.4%462K4.10
    30 June 20211.5M+22.7%297K5.12
    15 June 20211.2M-1.6%102K12.16
    28 May 20211.3M+6.3%86K14.71
    14 May 20211.2M+11.2%97K12.24
    30 April 20211.1M+67.3%201K5.31
    15 April 2021638K+5.5%212K3.01
    31 March 2021605K+1.9%173K3.49
    15 March 2021594K-16.3%201K2.96
    26 February 2021709K+2.3%92K7.73
    12 February 2021693K+0.5%104K6.64
    29 January 2021690K-1.4%174K3.96
    15 January 2021700K-16.5%280K2.50
    31 December 2020838K+21.6%180K4.66
    15 December 2020689K-4.4%210K3.28
    30 November 2020721K-39.0%121K5.97
    13 November 20201.2M+62.4%159K7.45
    30 October 2020728K-1.0%235K3.10
    15 October 2020735K+7.0%87K8.46
    30 September 2020687K+17.9%161K4.25
    15 September 2020583K+1.4%132K4.40
    31 August 2020575K-2.7%160K3.59
    14 August 2020591K-0.5%125K4.74
    31 July 2020594K-53.3%160K3.71
    15 July 20201.3M-23.2%284K4.48
    30 June 20201.7M+655.7%978K1.69
    15 June 2020219K-1.7%114K1.93
    29 May 2020223K+0.6%50K4.44
    15 May 2020222K-2.3%46K4.77
    30 April 2020227K+5.0%29K7.84
    15 April 2020216K+41.0%39K5.52
    31 March 2020153K+8.0%73K2.11
    13 March 2020142K+33.0%33K4.29
    28 February 2020107K+74.8%26K4.10
    14 February 202061K+20.2%45K1.36
    31 January 202051K-22.8%52K1.00
    15 January 202066K-24.5%44K1.50
    31 December 201987K+15.8%38K2.31
    13 December 201975K-13.8%31K2.44
    29 November 201987K-6.4%42K2.08
    15 November 201993K+55.9%62K1.50
    31 October 201960K-2.6%66K1.00
    15 October 201961K-11.7%37K1.64
    30 September 201970K+174.2%59K1.19
    13 September 201925K+9.5%19K1.31
    30 August 201923K+8.6%13K1.72
    15 August 201921K-28.3%9K2.33
    31 July 201930K-77.4%18K1.67
    15 July 2019132K+2.7%39K3.39
    28 June 2019128K+3.8%39K3.33
    14 June 2019124K+1.9%82K1.51
    31 May 2019121K232K1.00
    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.