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Septerna, Inc. short interest

3.5M shares of Septerna were sold short at the 15 October 2026 settlement, the most since 15 Jul 2025. Short sellers would need 7.6 days of normal trading to buy them back.

Shares sold short3.5Mat 15 Oct 2026
Change on the settlement before+13.8%+37% over a year
Days to cover7.63at 462K shares a day
Of shares in issue7.71%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 most since 15 Jul 2025, and the share price moved +89% 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 31 Oct 2024 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20263.5M+13.8%462K7.63
    30 September 20263.1M+7.0%352K8.80
    15 September 20262.9M+6.5%303K9.54
    31 August 20262.7M-5.4%355K7.65
    14 August 20262.9M-18.1%568K5.06
    31 July 20263.5M+4.7%248K14.15
    15 July 20263.4M+6.2%586K5.72
    30 June 20263.2M+18.3%598K5.28
    15 June 20262.7M+1.8%343K7.78
    29 May 20262.6M+9.5%275K9.51
    15 May 20262.4M+15.6%322K7.43
    30 April 20262.1M-15.9%380K5.44
    15 April 20262.5M+12.9%305K8.06
    31 March 20262.2M+4.8%249K8.73
    13 March 20262.1M+12.3%332K6.25
    27 February 20261.8M+3.9%330K5.61
    13 February 20261.8M-7.6%281K6.34
    30 January 20261.9M-0.8%251K7.66
    15 January 20261.9M+36.0%319K6.08
    31 December 20251.4M+11.7%258K5.54
    15 December 20251.3M-13.5%274K4.65
    28 November 20251.5M-23.1%405K3.65
    14 November 20251.9M-5.1%352K5.45
    31 October 20252.0M-21.2%263K7.72
    15 October 20252.6M-16.4%443K5.80
    30 September 20253.1M-3.0%268K11.49
    15 September 20253.2M+2.8%257K12.32
    29 August 20253.1M-2.5%213K14.48
    15 August 20253.2M-0.4%243K13.00
    31 July 20253.2M-15.1%213K14.89
    15 July 20253.7M+4.4%305K12.25
    30 June 20253.6M-4.8%567K6.32
    13 June 20253.8M-14.2%524K7.19
    30 May 20254.4M-3.8%851K5.16
    15 May 20254.6M+43.0%3.9M1.18
    30 April 20253.2M-4.6%190K16.83
    15 April 20253.3M+5.4%264K12.65
    31 March 20253.2M+6.6%272K11.67
    14 March 20253.0M+11.2%568K5.24
    28 February 20252.7M-13.1%1.7M1.60
    14 February 20253.1M+37.7%287K10.74
    31 January 20252.2M-7.1%211K10.59
    15 January 20252.4M-1.8%207K11.60
    31 December 20242.5M+142.7%653K3.75
    13 December 20241.0M+33.5%265K3.81
    29 November 2024756K+38.6%151K5.02
    15 November 2024546K+24.7%166K3.29
    31 October 2024438K368K1.19
    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.