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Pulse Biosciences, Inc. short interest

3.0M shares of Pulse Biosciences were sold short at the 15 October 2026 settlement, near the middle of its range over the last year (2.4M to 3.3M). Short sellers would need 7.2 days of normal trading to buy them back.

Shares sold short3.0Mat 15 Oct 2026
Change on the settlement before-9.3%+23% over a year
Days to cover7.20at 417K shares a day
Of shares in issue4.24%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 near the middle of its range over the last year (2.4M to 3.3M), and the share price moved +207% 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

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    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20263.0M-9.3%417K7.20
    30 September 20263.3M+5.5%591K5.61
    15 September 20263.1M+0.6%806K3.89
    31 August 20263.1M+12.9%393K7.94
    14 August 20262.8M-7.3%433K6.38
    31 July 20263.0M+3.2%426K7.00
    15 July 20262.9M+1.2%249K11.62
    30 June 20262.9M+1.3%434K6.59
    15 June 20262.8M-8.7%326K8.65
    29 May 20263.1M-4.1%295K10.47
    15 May 20263.2M+10.1%464K6.94
    30 April 20262.9M+0.6%241K12.11
    15 April 20262.9M-0.2%257K11.32
    31 March 20262.9M+11.1%246K11.83
    13 March 20262.6M+3.6%269K9.76
    27 February 20262.5M+0.0%401K6.31
    13 February 20262.5M-3.4%729K3.47
    30 January 20262.6M+1.9%142K18.47
    15 January 20262.6M-3.6%186K13.86
    31 December 20252.7M+2.9%195K13.67
    15 December 20252.6M+5.2%169K15.34
    28 November 20252.5M+1.8%198K12.48
    14 November 20252.4M+2.1%154K15.70
    31 October 20252.4M-3.2%119K19.95
    15 October 20252.5M-1.6%203K12.04
    30 September 20252.5M-2.0%234K10.64
    15 September 20252.5M+1.5%212K11.97
    29 August 20252.5M-1.8%131K19.06
    15 August 20252.5M+4.1%193K13.23
    31 July 20252.4M+0.3%137K17.80
    15 July 20252.4M-2.6%188K12.99
    30 June 20252.5M+2.1%196K12.76
    13 June 20252.5M+2.0%175K14.02
    30 May 20252.4M-2.2%153K15.76
    15 May 20252.5M+3.1%171K14.40
    30 April 20252.4M+1.2%154K15.45
    15 April 20252.4M-4.3%203K11.60
    31 March 20252.5M+6.2%263K9.34
    14 March 20252.3M+2.6%157K14.78
    28 February 20252.3M+2.5%148K15.26
    14 February 20252.2M+4.0%187K11.80
    31 January 20252.1M-0.7%131K16.19
    15 January 20252.1M+1.5%131K16.23
    31 December 20242.1M-3.1%169K12.44
    13 December 20242.2M+2.3%171K12.68
    29 November 20242.1M+1.7%168K12.60
    15 November 20242.1M-17.8%253K8.24
    31 October 20242.5M-7.8%116K21.96
    15 October 20242.8M-0.7%112K24.48
    30 September 20242.8M+0.9%189K14.65
    13 September 20242.7M-1.7%131K21.00
    30 August 20242.8M-4.9%194K14.38
    15 August 20242.9M+1.0%163K17.99
    31 July 20242.9M+3.9%213K13.65
    15 July 20242.8M+11.9%420K6.66
    28 June 20242.5M+2.7%250K10.01
    14 June 20242.4M-14.4%268K9.08
    31 May 20242.8M-3.0%312K9.13
    15 May 20242.9M+3.9%189K15.51
    30 April 20242.8M-2.9%134K21.12
    15 April 20242.9M+10.6%227K12.82
    28 March 20242.6M+5.2%139K18.93
    15 March 20242.5M-2.8%169K14.75
    29 February 20242.6M-1.1%149K17.28
    15 February 20242.6M-1.4%153K17.03
    31 January 20242.6M+6.6%201K13.07
    12 January 20242.5M+5.3%247K10.01
    29 December 20232.3M-8.2%469K5.00
    15 December 20232.6M+6.8%395K6.48
    30 November 20232.4M+2.5%335K7.14
    15 November 20232.3M+8.5%179K13.06
    31 October 20232.2M+4.0%87K24.85
    13 October 20232.1M-2.8%114K18.19
    29 September 20232.1M+4.9%136K15.70
    15 September 20232.0M+7.8%156K13.01
    31 August 20231.9M+10.2%417K4.51
    15 August 20231.7M+0.5%130K13.13
    31 July 20231.7M-5.3%122K13.90
    14 July 20231.8M-4.0%84K21.44
    30 June 20231.9M+17.6%306K6.11
    15 June 20231.6M+3.2%112K14.17
    31 May 20231.5M-8.1%98K15.71
    15 May 20231.7M-6.3%174K9.60
    28 April 20231.8M-5.5%89K20.18
    14 April 20231.9M-3.8%197K9.60
    31 March 20232.0M-5.6%61K32.43
    15 March 20232.1M+4.1%36K58.41
    28 February 20232.0M-5.7%35K56.78
    15 February 20232.1M-2.8%41K51.73
    31 January 20232.2M-2.1%67K32.65
    13 January 20232.2M+4.4%90K24.79
    30 December 20222.1M-5.2%86K24.99
    15 December 20222.3M-6.7%155K14.59
    30 November 20222.4M-1.2%55K43.98
    15 November 20222.5M+7.7%63K39.01
    31 October 20222.3M+1.7%69K33.02
    14 October 20222.2M+9.4%466K4.80
    30 September 20222.0M+6.4%603K3.39
    15 September 20221.9M+1.3%61K31.36
    31 August 20221.9M+2.6%100K18.93
    15 August 20221.8M+1.1%92K20.17
    29 July 20221.8M-3.8%65K28.29
    15 July 20221.9M+0.0%138K13.75
    30 June 20221.9M-21.1%252K7.55
    15 June 20222.4M-15.6%122K19.80
    31 May 20222.9M-0.6%207K13.75
    13 May 20222.9M+2.9%207K13.86
    29 April 20222.8M+12.3%525K5.31
    14 April 20222.5M-4.2%255K9.75
    31 March 20222.6M+1.9%119K21.78
    15 March 20222.5M+7.2%190K13.36
    28 February 20222.4M+13.7%203K11.72
    15 February 20222.1M+12.6%283K7.38
    31 January 20221.9M+8.0%164K11.31
    14 January 20221.7M+4.8%73K23.40
    31 December 20211.6M+4.4%77K21.20
    15 December 20211.6M+6.2%67K23.27
    30 November 20211.5M+1.1%55K26.64
    15 November 20211.5M+0.2%36K41.08
    29 October 20211.5M+0.9%41K35.44
    15 October 20211.4M-1.5%28K52.18
    30 September 20211.5M-6.6%58K25.20
    15 September 20211.6M-1.8%59K26.45
    31 August 20211.6M+0.5%62K25.71
    13 August 20211.6M+4.2%88K18.14
    30 July 20211.5M+7.1%73K20.80
    15 July 20211.4M+7.0%325K4.39
    30 June 20211.3M-4.6%62K21.57
    15 June 20211.4M+3.8%41K33.82
    28 May 20211.3M-3.5%36K37.13
    14 May 20211.4M+12.6%100K13.98
    30 April 20211.2M+1.8%57K21.55
    15 April 20211.2M-6.5%58K21.12
    31 March 20211.3M+0.9%104K12.57
    15 March 20211.3M+6.6%110K11.77
    26 February 20211.2M+7.7%127K9.51
    12 February 20211.1M-10.1%206K5.46
    29 January 20211.3M-22.1%158K7.90
    15 January 20211.6M-16.6%148K10.85
    31 December 20201.9M-10.0%110K17.49
    15 December 20202.1M-7.9%101K21.15
    30 November 20202.3M-0.4%39K59.19
    13 November 20202.3M-0.1%75K31.08
    30 October 20202.3M+1.0%60K39.12
    15 October 20202.3M-1.9%163K14.17
    30 September 20202.4M-2.0%71K33.26
    15 September 20202.4M-0.9%110K21.85
    31 August 20202.4M-5.4%71K34.06
    14 August 20202.6M-0.8%44K58.60
    31 July 20202.6M-3.7%55K47.17
    15 July 20202.7M-1.5%56K48.29
    30 June 20202.7M-1.5%137K19.95
    15 June 20202.8M+9.3%133K20.80
    29 May 20202.5M+6.5%107K23.77
    15 May 20202.4M-7.5%247K9.63
    30 April 20202.6M-1.5%109K23.68
    15 April 20202.6M-4.8%71K36.77
    31 March 20202.7M+0.9%99K27.79
    13 March 20202.7M+4.2%79K34.31
    28 February 20202.6M+11.7%150K17.40
    14 February 20202.3M+0.2%29K80.00
    31 January 20202.3M-5.3%45K51.57
    15 January 20202.5M+1.3%48K51.38
    31 December 20192.4M+1.7%36K68.19
    13 December 20192.4M-1.4%49K48.50
    29 November 20192.4M+0.4%53K45.98
    15 November 20192.4M+0.4%60K40.02
    31 October 20192.4M-3.6%48K50.11
    15 October 20192.5M-0.8%41K61.25
    30 September 20192.5M+2.7%77K32.73
    13 September 20192.4M-0.3%48K50.64
    30 August 20192.5M+1.6%21K114.94
    15 August 20192.4M-1.4%51K47.58
    31 July 20192.5M+1.7%34K71.73
    15 July 20192.4M+5.4%34K71.66
    28 June 20192.3M+0.9%47K48.90
    14 June 20192.3M+0.0%31K73.16
    31 May 20192.3M-0.7%46K49.77
    15 May 20192.3M+5.5%123K18.61
    30 April 20192.2M-1.0%42K51.86
    15 April 20192.2M+1.9%34K64.07
    29 March 20192.1M-0.9%50K42.73
    15 March 20192.2M+1.5%73K29.45
    28 February 20192.1M-1.3%81K26.33
    15 February 20192.2M+5.1%107K20.16
    31 January 20192.1M+2.7%65K31.70
    15 January 20192.0M+10.0%74K26.97
    31 December 20181.8M+5.2%117K15.52
    14 December 20181.7M+0.3%69K25.00
    30 November 20181.7M+0.4%37K46.08
    15 November 20181.7M-1.3%55K31.10
    31 October 20181.7M-1.8%71K24.48
    15 October 20181.8M-0.1%69K25.71
    28 September 20181.8M+1.1%60K29.36
    14 September 20181.7M-1.8%45K38.89
    31 August 20181.8M-0.9%35K50.71
    15 August 20181.8M-1.8%43K41.85
    31 July 20181.8M-0.2%66K27.84
    13 July 20181.8M+0.5%64K28.84
    29 June 20181.8M+2.7%81K22.55
    15 June 20181.8M-1.0%86K20.60
    31 May 20181.8M+1.4%86K20.89
    15 May 20181.8M-5.9%181K9.80
    30 April 20181.9M-8.9%168K11.18
    13 April 20182.1M+2.4%311K6.63
    29 March 20182.0M+24.3%222K9.07
    15 March 20181.6M+8.3%142K11.44
    28 February 20181.5M-1.1%53K28.53
    15 February 20181.5M+2.2%109K13.89
    31 January 20181.5M+1.5%99K15.00
    12 January 20181.5M-5.6%71K20.51
    29 December 20171.5M128K12.05
    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.