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Pulmonx Corp. short interest

699K shares of Pulmonx were sold short at the 15 October 2026 settlement, the fewest since 30 Nov 2020. Short sellers would need 2.5 days of normal trading to buy them back.

Shares sold short699Kat 15 Oct 2026
Change on the settlement before-13.0%-51% over a year
Days to cover2.54at 275K shares a day
Of shares in issue1.63%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 Nov 2020, and the share price moved +86% 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 Oct 2020 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 2026699K-13.0%275K2.54
    30 September 2026803K-5.3%251K3.20
    15 September 2026848K-13.2%337K2.51
    31 August 2026976K-8.5%378K2.58
    14 August 20261.1M+0.6%901K1.18
    31 July 20261.1M+0.4%731K1.45
    15 July 20261.1M-8.1%228K4.64
    30 June 20261.1M-49.2%863K1.33
    15 June 20262.3M-19.7%314K7.21
    29 May 20262.8M+4.3%417K6.75
    15 May 20262.7M-24.2%567K4.76
    30 April 20263.6M+26.5%492K7.23
    15 April 20262.8M-1.5%206K13.69
    31 March 20262.9M-13.4%555K5.15
    13 March 20263.3M-0.5%1.1M3.11
    27 February 20263.3M+1.1%318K10.43
    13 February 20263.3M+16.5%385K8.53
    30 January 20262.8M+7.0%275K10.24
    15 January 20262.6M-10.9%373K7.05
    31 December 20253.0M-4.3%669K4.42
    15 December 20253.1M+22.2%1.2M2.59
    28 November 20252.5M+24.0%883K2.86
    14 November 20252.0M-13.5%1.4M1.47
    31 October 20252.4M+66.0%10.3M1.00
    15 October 20251.4M-1.2%273K5.20
    30 September 20251.4M-19.4%351K4.09
    15 September 20251.8M+8.2%382K4.66
    29 August 20251.6M+7.0%699K2.35
    15 August 20251.5M+12.4%1.1M1.44
    31 July 20251.4M-5.0%808K1.69
    15 July 20251.4M+9.2%374K3.85
    30 June 20251.3M-7.0%284K4.64
    13 June 20251.4M+6.1%399K3.55
    30 May 20251.3M-14.2%328K4.07
    15 May 20251.6M+30.4%537K2.90
    30 April 20251.2M+1.9%299K3.98
    15 April 20251.2M-5.1%413K2.84
    31 March 20251.2M+5.9%264K4.68
    14 March 20251.2M-6.8%271K4.31
    28 February 20251.3M+9.0%762K1.64
    14 February 20251.1M-5.8%209K5.49
    31 January 20251.2M-2.8%187K6.53
    15 January 20251.3M+42.7%266K4.72
    31 December 2024879K+5.7%209K4.20
    13 December 2024832K+2.0%270K3.08
    29 November 2024816K-3.2%171K4.77
    15 November 2024843K-14.5%237K3.56
    31 October 2024986K-44.6%215K4.59
    15 October 20241.8M+6.3%177K10.07
    30 September 20241.7M-6.8%242K6.91
    13 September 20241.8M+13.8%336K5.35
    30 August 20241.6M+8.8%289K5.46
    15 August 20241.5M-8.1%341K4.26
    31 July 20241.6M+22.5%375K4.22
    15 July 20241.3M+7.4%226K5.71
    28 June 20241.2M-14.2%421K2.85
    14 June 20241.4M-11.2%413K3.39
    31 May 20241.6M+1.3%335K4.71
    15 May 20241.6M+10.2%581K2.68
    30 April 20241.4M-18.2%389K3.63
    15 April 20241.7M+53.2%657K2.63
    28 March 20241.1M+8.1%627K1.80
    15 March 20241.0M-17.5%482K2.16
    29 February 20241.3M+0.3%1.1M1.17
    15 February 20241.3M-18.7%359K3.51
    31 January 20241.5M-0.4%242K6.41
    12 January 20241.6M+7.4%257K6.06
    29 December 20231.4M+3.1%248K5.86
    15 December 20231.4M-1.8%278K5.06
    30 November 20231.4M+7.4%256K5.59
    15 November 20231.3M+2.4%285K4.69
    31 October 20231.3M+6.0%209K6.23
    13 October 20231.2M-3.3%170K7.23
    29 September 20231.3M+3.6%256K4.97
    15 September 20231.2M-2.6%210K5.84
    31 August 20231.3M-26.1%152K8.31
    15 August 20231.7M-15.9%196K8.70
    31 July 20232.0M+23.5%247K8.19
    14 July 20231.6M-5.1%147K11.13
    30 June 20231.7M-39.7%401K4.31
    15 June 20232.9M+19.4%244K11.73
    31 May 20232.4M-6.9%179K13.41
    15 May 20232.6M-3.3%285K9.04
    28 April 20232.7M-6.2%374K7.12
    14 April 20232.8M-7.9%325K8.73
    31 March 20233.1M+18.3%537K5.74
    15 March 20232.6M+10.1%712K3.66
    28 February 20232.4M-16.3%755K3.13
    15 February 20232.8M-7.5%383K7.38
    31 January 20233.1M+3.7%352K8.68
    13 January 20232.9M+4.4%501K5.88
    30 December 20222.8M-4.1%560K5.04
    15 December 20222.9M+3.0%472K6.23
    30 November 20222.9M+17.7%498K5.74
    15 November 20222.4M-25.4%1.7M1.46
    31 October 20223.3M-12.8%412K7.90
    14 October 20223.7M+6.9%279K13.36
    30 September 20223.5M+4.8%226K15.47
    15 September 20223.3M+5.4%281K11.84
    31 August 20223.2M+7.8%324K9.74
    15 August 20222.9M-12.9%415K7.06
    29 July 20223.4M+23.7%308K10.93
    15 July 20222.7M-6.9%283K9.61
    30 June 20222.9M+12.1%719K4.06
    15 June 20222.6M-3.6%565K4.61
    31 May 20222.7M-20.2%500K5.40
    13 May 20223.4M+9.7%795K4.25
    29 April 20223.1M+15.7%508K6.08
    14 April 20222.7M-0.1%365K7.31
    31 March 20222.7M-4.3%314K8.50
    15 March 20222.8M-5.0%402K6.95
    28 February 20222.9M+12.9%679K4.33
    15 February 20222.6M+6.6%367K7.10
    31 January 20222.4M+40.6%457K5.35
    14 January 20221.7M+8.7%418K4.16
    31 December 20211.6M-19.1%288K5.55
    15 December 20212.0M+17.1%375K5.26
    30 November 20211.7M+14.8%488K3.46
    15 November 20211.5M-4.9%393K3.73
    29 October 20211.5M+9.3%221K6.98
    15 October 20211.4M-2.1%252K5.61
    30 September 20211.4M+20.9%436K3.31
    15 September 20211.2M-9.4%305K3.91
    31 August 20211.3M+9.7%272K4.85
    13 August 20211.2M+7.2%445K2.70
    30 July 20211.1M+2.8%238K4.72
    15 July 20211.1M-10.4%455K2.40
    30 June 20211.2M+25.7%521K2.33
    15 June 2021968K+1.1%325K2.98
    28 May 2021958K-7.5%413K2.32
    14 May 20211.0M+29.6%590K1.75
    30 April 2021799K-6.3%374K2.14
    15 April 2021852K-56.9%439K1.94
    31 March 20212.0M+72.4%438K4.51
    15 March 20211.1M+18.2%251K4.57
    26 February 2021969K+5.1%78K12.48
    12 February 2021922K-32.3%101K9.15
    29 January 20211.4M-0.6%100K13.63
    15 January 20211.4M-12.4%176K7.79
    31 December 20201.6M+109.0%450K3.47
    15 December 2020748K+89.0%216K3.45
    30 November 2020396K+3.6%138K2.87
    13 November 2020382K+117.6%139K2.74
    30 October 2020175K-39.1%131K1.34
    15 October 2020288K781K1.00
    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.