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Sera Prognostics, Inc. short interest

223K shares of Sera Prognostics were sold short at the 15 October 2026 settlement, near the bottom of its range over the last year (214K to 533K). Short sellers would need 21.5 days of normal trading to buy them back.

Shares sold short223Kat 15 Oct 2026
Change on the settlement before-3.1%-58% over a year
Days to cover21.54at 10K shares a day
Of shares in issuen/a
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 (214K to 533K), and the share price moved -35% 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 30 Jul 2021 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 2026223K-3.1%10K21.54
    30 September 2026230K+7.4%17K13.42
    15 September 2026214K-3.6%28K7.55
    31 August 2026222K-1.5%21K10.45
    14 August 2026225K-2.4%38K6.00
    31 July 2026231K-4.1%36K6.43
    15 July 2026241K-8.3%35K6.83
    30 June 2026263K-1.0%41K6.45
    15 June 2026265K-10.8%51K5.24
    29 May 2026297K+5.8%95K3.14
    15 May 2026281K-5.8%67K4.18
    30 April 2026298K-14.2%15K19.72
    15 April 2026348K-8.8%33K10.66
    31 March 2026381K+54.2%83K4.61
    13 March 2026247K-12.8%115K2.16
    27 February 2026284K-1.6%27K10.37
    13 February 2026288K-8.7%22K13.01
    30 January 2026316K-6.5%55K5.70
    15 January 2026338K+13.1%58K5.86
    31 December 2025298K-14.8%58K5.18
    15 December 2025350K-10.4%65K5.35
    28 November 2025391K-9.6%31K12.66
    14 November 2025433K-9.4%36K11.91
    31 October 2025478K-10.3%49K9.71
    15 October 2025533K-5.9%34K15.63
    30 September 2025566K-10.9%61K9.27
    15 September 2025635K-11.3%77K8.22
    29 August 2025716K-12.5%138K5.18
    15 August 2025818K-34.2%124K6.58
    31 July 20251.2M-8.5%87K14.28
    15 July 20251.4M+6.5%212K6.40
    30 June 20251.3M+45.8%1.2M1.06
    13 June 2025875K-13.2%456K1.92
    30 May 20251.0M+21.3%290K3.48
    15 May 2025830K+9.0%171K4.84
    30 April 2025762K-3.1%91K8.38
    15 April 2025786K-18.2%84K9.38
    31 March 2025961K+16.8%116K8.30
    14 March 2025822K-4.3%95K8.68
    28 February 2025859K+4.7%106K8.09
    14 February 2025821K-2.1%192K4.28
    31 January 2025839K-0.6%72K11.68
    15 January 2025844K-19.9%132K6.42
    31 December 20241.1M+18.5%172K6.12
    13 December 2024889K-7.5%88K10.13
    29 November 2024961K+2.5%54K17.70
    15 November 2024937K-10.1%110K8.51
    31 October 20241.0M-6.9%47K22.13
    15 October 20241.1M+7.2%65K17.34
    30 September 20241.0M+32.6%187K5.59
    13 September 2024788K-2.9%65K12.19
    30 August 2024811K+3.1%72K11.32
    15 August 2024787K+9.9%117K6.70
    31 July 2024716K+13.0%127K5.64
    15 July 2024633K+147.8%147K4.31
    28 June 2024256K+11.4%655K1.00
    14 June 2024229K-9.2%98K2.34
    31 May 2024253K-0.3%128K1.98
    15 May 2024253K+27.5%156K1.62
    30 April 2024199K-15.2%79K2.53
    15 April 2024234K+18.0%196K1.19
    28 March 2024199K+71.6%376K1.00
    15 March 2024116K+8.6%148K1.00
    29 February 2024107K-9.5%214K1.00
    15 February 2024118K-26.7%240K1.00
    31 January 2024161K-26.1%243K1.00
    12 January 2024217K-5.4%278K1.00
    29 December 2023230K-44.2%474K1.00
    15 December 2023412K+102.3%7.8M1.00
    30 November 2023204K-6.1%14K14.43
    15 November 2023217K-0.9%10K22.12
    31 October 2023219K-7.5%10K22.78
    13 October 2023237K+1.5%28K8.55
    29 September 2023233K+56.7%109K2.13
    15 September 2023149K+31.3%63K2.38
    31 August 2023113K-14.0%28K4.11
    15 August 2023132K-10.8%44K2.99
    31 July 2023148K+5.3%27K5.42
    14 July 2023140K-3.3%21K6.53
    30 June 2023145K-1.3%42K3.47
    15 June 2023147K-0.9%29K5.04
    31 May 2023148K+3.8%15K9.71
    15 May 2023143K-2.5%25K5.80
    28 April 2023146K-19.6%37K3.94
    14 April 2023182K-25.0%29K6.30
    31 March 2023243K-23.3%94K2.57
    15 March 2023316K-19.9%136K2.33
    28 February 2023395K+612.5%3.0M1.00
    15 February 202355K-16.9%5.3M1.00
    31 January 202367K-3.0%5K13.03
    13 January 202369K-0.4%21K3.34
    30 December 202269K+2.1%76K1.00
    15 December 202268K-9.4%15K4.60
    30 November 202275K-10.7%30K2.46
    15 November 202283K+21.8%38K2.20
    31 October 202269K-25.3%42K1.62
    14 October 202292K-6.0%10K9.63
    30 September 202298K+65.5%42K2.30
    15 September 202259K+1.0%44K1.33
    31 August 202258K-22.3%21K2.80
    15 August 202275K-32.6%35K2.16
    29 July 2022111K-4.4%25K4.51
    15 July 2022117K-52.1%106K1.09
    30 June 2022243K-31.7%270K1.00
    15 June 2022357K-12.4%140K2.54
    31 May 2022407K+44.7%173K2.35
    13 May 2022281K+3.7%89K3.15
    29 April 2022271K+53.6%104K2.61
    14 April 2022177K-1.4%71K2.49
    31 March 2022179K+62.8%85K2.11
    15 March 2022110K-4.0%35K3.11
    28 February 2022115K+8.0%34K3.33
    15 February 2022106K-36.3%66K1.61
    31 January 2022167K-28.9%45K3.72
    14 January 2022234K+23.2%49K4.74
    31 December 2021190K+9.3%44K4.36
    15 December 2021174K-1.6%18K9.64
    30 November 2021177K+0.0%21K8.41
    15 November 2021177K+9.1%20K8.86
    29 October 2021162K+38.4%26K6.20
    15 October 2021117K-48.2%50K2.34
    30 September 2021226K+48.7%104K2.17
    15 September 2021152K-1.6%76K2.01
    31 August 2021155K+58.4%85K1.83
    13 August 202198K-11.7%91K1.07
    30 July 2021111K157K1.00
    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.