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Backblaze, Inc. short interest

7.2M shares of Backblaze were sold short at the 15 October 2026 settlement, the most at any settlement since 15 Nov 2021, when our record starts. Short sellers would need 4.6 days of normal trading to buy them back.

Shares sold short7.2Mat 15 Oct 2026
Change on the settlement before+3.9%+473% over a year
Days to cover4.63at 1.6M shares a day
Of shares in issue11.60%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 at any settlement since 15 Nov 2021, when our record starts, and the share price moved -8% 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 15 Nov 2021 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20267.2M+3.9%1.6M4.63
    30 September 20266.9M+25.5%1.8M3.79
    15 September 20265.5M+30.8%1.6M3.37
    31 August 20264.2M+135.5%3.3M1.29
    14 August 20261.8M-33.7%4.1M1.00
    31 July 20262.7M+2.9%1.9M1.42
    15 July 20262.6M-4.9%2.4M1.07
    30 June 20262.8M+83.8%8.2M1.00
    15 June 20261.5M-2.3%1.5M1.01
    29 May 20261.5M-9.8%1.5M1.02
    15 May 20261.7M+49.3%5.4M1.00
    30 April 20261.1M-18.2%433K2.63
    15 April 20261.4M-23.8%514K2.71
    31 March 20261.8M-9.6%504K3.63
    13 March 20262.0M+37.8%1.0M1.94
    27 February 20261.5M+43.1%1.3M1.11
    13 February 20261.0M+10.8%782K1.31
    30 January 2026925K+0.6%591K1.57
    15 January 2026919K-6.3%544K1.69
    31 December 2025981K-3.4%806K1.22
    15 December 20251.0M+8.7%714K1.42
    28 November 2025935K-1.7%862K1.08
    14 November 2025951K-31.8%1.1M1.00
    31 October 20251.4M+11.3%414K3.37
    15 October 20251.3M+9.5%510K2.46
    30 September 20251.1M+4.7%825K1.39
    15 September 20251.1M+2.4%973K1.12
    29 August 20251.1M-4.9%582K1.84
    15 August 20251.1M-2.8%879K1.28
    31 July 20251.2M-16.5%288K4.02
    15 July 20251.4M-11.2%261K5.31
    30 June 20251.6M+19.7%469K3.33
    13 June 20251.3M+6.6%324K4.02
    30 May 20251.2M-8.0%654K1.87
    15 May 20251.3M-2.8%358K3.71
    30 April 20251.4M+6.2%577K2.37
    15 April 20251.3M+32.6%454K2.84
    31 March 2025971K+65.3%438K2.22
    14 March 2025587K-5.4%551K1.07
    28 February 2025621K+32.7%800K1.00
    14 February 2025468K-8.1%366K1.28
    31 January 2025509K-34.4%216K2.35
    15 January 2025776K+6.5%218K3.56
    31 December 2024729K-2.0%264K2.76
    13 December 2024744K-4.9%396K1.88
    29 November 2024782K-11.9%919K1.00
    15 November 2024888K-17.0%310K2.87
    31 October 20241.1M-16.3%157K6.83
    15 October 20241.3M-3.1%187K6.82
    30 September 20241.3M-0.7%231K5.70
    13 September 20241.3M-11.7%180K7.38
    30 August 20241.5M-3.1%339K4.44
    15 August 20241.6M-4.3%401K3.87
    31 July 20241.6M+1.7%232K6.99
    15 July 20241.6M+106.0%304K5.25
    28 June 2024775K+10.1%903K1.00
    14 June 2024704K+51.5%258K2.73
    31 May 2024465K-42.7%355K1.31
    15 May 2024811K-30.8%472K1.72
    30 April 20241.2M-12.6%192K6.11
    15 April 20241.3M+8.0%206K6.50
    28 March 20241.2M-12.4%278K4.46
    15 March 20241.4M+5.5%436K3.25
    29 February 20241.3M+70.7%1.1M1.17
    15 February 2024786K+1.4%374K2.10
    31 January 2024775K+14.4%154K5.03
    12 January 2024678K+5.4%153K4.43
    29 December 2023643K+27.6%200K3.21
    15 December 2023504K+97.2%363K1.39
    30 November 2023256K-31.4%289K1.00
    15 November 2023373K+14.7%159K2.35
    31 October 2023325K-16.3%100K3.24
    13 October 2023389K-9.6%118K3.28
    29 September 2023430K+104.4%200K2.15
    15 September 2023210K+41.6%298K1.00
    31 August 2023148K-24.4%336K1.00
    15 August 2023196K+18.3%123K1.60
    31 July 2023166K+32.4%93K1.79
    14 July 2023125K+4.1%167K1.00
    30 June 2023120K+20.1%222K1.00
    15 June 2023100K-45.4%114K1.00
    31 May 2023184K-0.8%198K1.00
    15 May 2023185K-13.4%93K1.99
    28 April 2023214K-1.0%72K2.99
    14 April 2023216K+7.4%69K3.12
    31 March 2023201K-5.7%75K2.67
    15 March 2023213K+7.4%86K2.48
    28 February 2023199K-22.3%177K1.12
    15 February 2023256K+75.4%123K2.09
    31 January 2023146K-19.9%90K1.63
    13 January 2023182K-18.1%115K1.59
    30 December 2022222K-18.9%114K1.96
    15 December 2022274K+19.2%112K2.46
    30 November 2022230K+2.0%98K2.36
    15 November 2022226K-2.1%94K2.39
    31 October 2022230K-11.3%84K2.75
    14 October 2022260K-3.6%109K2.38
    30 September 2022269K+29.6%74K3.66
    15 September 2022208K-17.8%70K2.96
    31 August 2022253K+9.5%110K2.30
    15 August 2022231K+22.6%142K1.63
    29 July 2022188K-22.3%177K1.06
    15 July 2022243K-22.0%76K3.21
    30 June 2022311K-0.5%109K2.85
    15 June 2022313K-15.9%107K2.93
    31 May 2022372K-20.6%154K2.42
    13 May 2022468K-6.6%180K2.60
    29 April 2022501K-1.4%175K2.87
    14 April 2022508K+5.3%36K14.04
    31 March 2022483K+22.3%77K6.25
    15 March 2022395K-8.6%81K4.87
    28 February 2022432K+99.8%303K1.43
    15 February 2022216K-1.2%84K2.57
    31 January 2022219K+6.6%126K1.73
    14 January 2022205K-52.4%190K1.08
    31 December 2021431K+30.0%244K1.77
    15 December 2021331K+53.2%452K1.00
    30 November 2021216K+30.6%1.0M1.00
    15 November 2021166K1.3M1.00
    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.