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Personalis, Inc. short interest

6.8M shares of Personalis were sold short at the 15 October 2026 settlement, the fewest since 30 Jun 2025. Short sellers would need 2.6 days of normal trading to buy them back.

Shares sold short6.8Mat 15 Oct 2026
Change on the settlement before-19.4%-11% over a year
Days to cover2.64at 2.6M shares a day
Of shares in issue6.39%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 30 Jun 2025, and the share price moved +88% 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 28 Jun 2019 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20266.8M-19.4%2.6M2.64
    30 September 20268.4M+2.0%1.9M4.33
    15 September 20268.3M-1.4%2.3M3.55
    31 August 20268.4M-0.2%4.7M1.80
    14 August 20268.4M-3.6%2.3M3.61
    31 July 20268.7M-21.5%5.1M1.69
    15 July 202611.1M-1.9%4.8M2.34
    30 June 202611.3M+1.8%4.1M2.78
    15 June 202611.1M-13.4%3.1M3.60
    29 May 202612.8M-6.6%3.0M4.30
    15 May 202613.7M+4.8%2.4M5.64
    30 April 202613.1M+5.7%2.3M5.80
    15 April 202612.4M+5.4%1.3M9.48
    31 March 202611.8M+5.3%1.6M7.40
    13 March 202611.2M-0.3%1.7M6.43
    27 February 202611.2M+4.9%1.3M8.75
    13 February 202610.7M+21.2%1.2M8.56
    30 January 20268.8M+0.9%1.5M5.81
    15 January 20268.7M+6.4%1.2M7.49
    31 December 20258.2M+0.3%1.3M6.10
    15 December 20258.2M+5.2%1.5M5.61
    28 November 20257.8M+0.5%1.7M4.51
    14 November 20257.7M+10.3%1.9M4.04
    31 October 20257.0M-8.5%1.4M5.04
    15 October 20257.7M-7.8%1.1M7.30
    30 September 20258.3M+10.2%856K9.72
    15 September 20257.5M-7.3%904K8.35
    29 August 20258.1M+8.2%803K10.14
    15 August 20257.5M+4.8%1.3M5.96
    31 July 20257.2M+4.8%880K8.16
    15 July 20256.8M+11.6%1.4M4.76
    30 June 20256.1M+58.9%2.2M2.73
    13 June 20253.9M-0.3%909K4.25
    30 May 20253.9M-8.9%520K7.46
    15 May 20254.3M+10.1%904K4.70
    30 April 20253.9M-12.4%573K6.73
    15 April 20254.4M+1.7%695K6.34
    31 March 20254.3M+0.0%808K5.37
    14 March 20254.3M+14.8%1.1M3.80
    28 February 20253.8M-2.6%1.3M2.88
    14 February 20253.9M+9.9%985K3.94
    31 January 20253.5M+0.4%1.3M2.72
    15 January 20253.5M+6.2%1.0M3.48
    31 December 20243.3M+11.3%2.0M1.68
    13 December 20243.0M-1.6%512K5.80
    29 November 20243.0M+5.9%733K4.12
    15 November 20242.9M-11.9%1.2M2.44
    31 October 20243.2M+3.7%419K7.72
    15 October 20243.1M+6.2%496K6.28
    30 September 20242.9M+29.7%895K3.28
    13 September 20242.3M-0.3%847K2.68
    30 August 20242.3M+14.7%1.9M1.20
    15 August 20242.0M+9.3%1.4M1.37
    31 July 20241.8M+19.6%3.0M1.00
    15 July 20241.5M+6.5%598K2.53
    28 June 20241.4M+0.2%215K6.62
    14 June 20241.4M+11.9%237K5.99
    31 May 20241.3M+7.3%193K6.59
    15 May 20241.2M-5.9%264K4.49
    30 April 20241.3M+17.1%215K5.86
    15 April 20241.1M-0.6%224K4.80
    28 March 20241.1M+2.2%294K3.68
    15 March 20241.1M+15.7%436K2.42
    29 February 2024914K-2.6%381K2.40
    15 February 2024938K+13.5%396K2.37
    31 January 2024827K-8.1%481K1.72
    12 January 2024900K+10.8%480K1.87
    29 December 2023812K+1.9%814K1.00
    15 December 2023796K-3.5%489K1.63
    30 November 2023825K-8.2%1.1M1.00
    15 November 2023900K+20.9%895K1.00
    31 October 2023744K-3.6%181K4.10
    13 October 2023771K-22.4%152K5.09
    29 September 2023994K-2.6%168K5.90
    15 September 20231.0M-8.4%175K5.83
    31 August 20231.1M-19.6%283K3.94
    15 August 20231.4M+0.8%160K8.63
    31 July 20231.4M-3.2%145K9.51
    14 July 20231.4M+5.1%219K6.48
    30 June 20231.4M+7.3%172K7.86
    15 June 20231.3M-9.3%295K4.26
    31 May 20231.4M-6.7%302K4.59
    15 May 20231.5M-2.6%345K4.31
    28 April 20231.5M-4.0%351K4.35
    14 April 20231.6M-3.4%221K7.18
    31 March 20231.6M-14.7%289K5.69
    15 March 20231.9M+5.5%456K4.23
    28 February 20231.8M+9.0%519K3.52
    15 February 20231.7M+4.4%1.4M1.21
    31 January 20231.6M-5.2%244K6.58
    13 January 20231.7M+32.1%471K3.60
    30 December 20221.3M-0.7%426K3.01
    15 December 20221.3M-3.7%356K3.63
    30 November 20221.3M-0.3%305K4.40
    15 November 20221.3M-2.0%435K3.10
    31 October 20221.4M+2.3%345K3.99
    14 October 20221.3M+0.5%340K3.95
    30 September 20221.3M-2.0%405K3.30
    15 September 20221.4M+4.0%364K3.75
    31 August 20221.3M+6.2%358K3.66
    15 August 20221.2M+0.1%591K2.09
    29 July 20221.2M-11.5%576K2.14
    15 July 20221.4M+23.4%392K3.56
    30 June 20221.1M-44.8%1.1M1.07
    15 June 20222.0M-12.3%745K2.75
    31 May 20222.3M+8.9%572K4.08
    13 May 20222.1M+17.1%658K3.26
    29 April 20221.8M+15.7%438K4.18
    14 April 20221.6M-9.9%352K4.49
    31 March 20221.8M-3.4%385K4.55
    15 March 20221.8M-5.5%492K3.70
    28 February 20221.9M-2.6%500K3.85
    15 February 20222.0M-3.8%421K4.69
    31 January 20222.1M+4.1%541K3.79
    14 January 20222.0M+11.8%469K4.20
    31 December 20211.8M-9.2%506K3.49
    15 December 20211.9M+8.9%540K3.59
    30 November 20211.8M+29.4%519K3.43
    15 November 20211.4M-6.9%362K3.81
    29 October 20211.5M-3.6%229K6.46
    15 October 20211.5M-16.0%434K3.53
    30 September 20211.8M-4.4%418K4.37
    15 September 20211.9M-1.5%372K5.14
    31 August 20211.9M-12.9%349K5.55
    13 August 20212.2M+2.6%303K7.35
    30 July 20212.2M+8.0%309K7.02
    15 July 20212.0M-3.5%381K5.27
    30 June 20212.1M-13.6%725K2.87
    15 June 20212.4M-6.2%501K4.81
    28 May 20212.6M-2.4%507K5.07
    14 May 20212.6M-14.0%847K3.11
    30 April 20213.1M-0.6%575K5.32
    15 April 20213.1M-4.7%657K4.68
    31 March 20213.2M+5.4%830K3.89
    15 March 20213.1M+34.0%1.2M2.63
    26 February 20212.3M+14.4%859K2.66
    12 February 20212.0M+9.9%763K2.62
    29 January 20211.8M-25.9%1.3M1.39
    15 January 20212.5M+23.9%1.0M2.42
    31 December 20202.0M+42.6%826K2.40
    15 December 20201.4M+3.9%855K1.62
    30 November 20201.3M+2.8%991K1.35
    13 November 20201.3M-22.3%718K1.81
    30 October 20201.7M+14.7%434K3.86
    15 October 20201.5M-10.4%700K2.08
    30 September 20201.6M+87.8%667K2.44
    15 September 2020866K-8.6%489K1.77
    31 August 2020948K+1.1%720K1.32
    14 August 2020938K-4.0%687K1.37
    31 July 2020977K-5.5%158K6.20
    15 July 20201.0M+4.3%225K4.59
    30 June 2020991K+17.9%287K3.46
    15 June 2020841K-6.1%366K2.30
    29 May 2020896K-15.9%227K3.95
    15 May 20201.1M-29.2%251K4.23
    30 April 20201.5M-11.0%251K5.99
    15 April 20201.7M+6.8%241K7.00
    31 March 20201.6M+8.7%562K2.82
    13 March 20201.5M+0.2%438K3.32
    28 February 20201.5M-2.2%331K4.39
    14 February 20201.5M+0.8%290K5.11
    31 January 20201.5M+11.2%400K3.69
    15 January 20201.3M+4.2%506K2.62
    31 December 20191.3M+23.9%571K2.22
    13 December 20191.0M+15.7%252K4.06
    29 November 2019887K+14.8%353K2.51
    15 November 2019772K+4.5%272K2.84
    31 October 2019739K-14.8%209K3.54
    15 October 2019867K+7.2%314K2.76
    30 September 2019810K+57.7%369K2.20
    13 September 2019513K-5.1%305K1.68
    30 August 2019541K+7.3%254K2.13
    15 August 2019504K+17.6%410K1.23
    31 July 2019429K+13.0%395K1.09
    15 July 2019380K+238.3%580K1.00
    28 June 2019112K950K1.00
    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.