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Westinghouse Air Brake Technologies Corp. short interest

3.8M shares of Westinghouse Air Brake Technologies were sold short at the 15 October 2026 settlement, near the top of its range over the last year (1.8M to 3.8M). Short sellers would need 4.4 days of normal trading to buy them back.

Shares sold short3.8Mat 15 Oct 2026
Change on the settlement before+6.6%+51% over a year
Days to cover4.37at 864K shares a day
Of shares in issue2.24%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 top of its range over the last year (1.8M to 3.8M), and the share price moved +44% 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. Counts before a split are restated to today's shares, the way the price is.

How it compares

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    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20263.8M+6.6%864K4.37
    30 September 20263.5M-2.6%857K4.13
    15 September 20263.6M+9.2%709K5.13
    31 August 20263.3M+19.2%825K4.03
    14 August 20262.8M-27.2%927K3.01
    31 July 20263.8M+13.4%1.3M3.00
    15 July 20263.4M+12.2%684K4.95
    30 June 20263.0M-0.4%1.0M2.98
    15 June 20263.0M+1.3%738K4.10
    29 May 20263.0M+5.3%975K3.06
    15 May 20262.8M-5.5%971K2.92
    30 April 20263.0M+20.4%1.0M2.91
    15 April 20262.5M+12.9%1.2M2.00
    31 March 20262.2M+19.2%826K2.67
    13 March 20261.9M-19.0%917K2.02
    27 February 20262.3M+27.8%926K2.47
    13 February 20261.8M-1.8%1.1M1.61
    30 January 20261.8M-13.9%662K2.76
    15 January 20262.1M+3.4%655K3.23
    31 December 20252.0M-15.0%819K2.50
    15 December 20252.4M+12.8%753K3.20
    28 November 20252.1M-15.4%862K2.48
    14 November 20252.5M+4.8%975K2.59
    31 October 20252.4M-3.6%950K2.54
    15 October 20252.5M-11.9%843K2.97
    30 September 20252.8M+6.1%1.2M2.35
    15 September 20252.7M-2.1%1.1M2.49
    29 August 20252.7M+6.1%837K3.27
    15 August 20252.6M-0.4%1.3M2.04
    31 July 20252.6M+38.2%1.5M1.69
    15 July 20251.9M-3.9%855K2.19
    30 June 20251.9M-6.3%1.1M1.79
    13 June 20252.1M+32.2%689K3.02
    30 May 20251.6M-22.1%923K1.70
    15 May 20252.0M-3.1%780K2.59
    30 April 20252.1M+9.6%1.0M1.99
    15 April 20251.9M+3.9%1.1M1.75
    31 March 20251.8M-28.4%1.1M1.66
    14 March 20252.6M+14.8%1.2M2.08
    28 February 20252.2M-9.3%1.5M1.47
    14 February 20252.5M+9.8%1.4M1.70
    31 January 20252.2M-5.3%793K2.82
    15 January 20252.4M-1.9%1.0M2.33
    31 December 20242.4M-3.1%1.2M2.04
    13 December 20242.5M+14.2%1.4M1.73
    29 November 20242.2M-4.6%727K2.99
    15 November 20242.3M+12.7%863K2.64
    31 October 20242.0M+9.8%1.0M2.01
    15 October 20241.8M-16.8%769K2.40
    30 September 20242.2M-16.9%1.3M1.71
    13 September 20242.7M-9.1%834K3.20
    30 August 20242.9M+19.5%1.0M2.83
    15 August 20242.5M+31.6%1.5M1.63
    31 July 20241.9M+5.0%1.3M1.44
    15 July 20241.8M+4.6%1.1M1.66
    28 June 20241.7M-9.9%1.1M1.49
    14 June 20241.9M+1.1%832K2.26
    31 May 20241.9M+0.3%1.2M1.51
    15 May 20241.9M+0.6%1.0M1.80
    30 April 20241.8M-9.3%1.5M1.26
    15 April 20242.0M+7.6%994K2.05
    28 March 20241.9M-14.9%695K2.72
    15 March 20242.2M-7.6%903K2.46
    29 February 20242.4M+21.0%1.2M1.99
    15 February 20242.0M+2.1%1.4M1.40
    31 January 20241.9M-2.8%950K2.05
    12 January 20242.0M+0.4%910K2.20
    29 December 20232.0M-8.9%662K3.02
    15 December 20232.2M+2.2%1.0M2.18
    30 November 20232.1M+11.9%906K2.37
    15 November 20231.9M+22.2%1.0M1.85
    31 October 20231.6M-14.2%1.0M1.57
    13 October 20231.8M+4.9%770K2.37
    29 September 20231.7M-12.5%628K2.78
    15 September 20232.0M+14.3%835K2.39
    31 August 20231.7M-2.8%526K3.31
    15 August 20231.8M+2.7%731K2.45
    31 July 20231.7M-17.1%1.1M1.59
    14 July 20232.1M-8.1%896K2.35
    30 June 20232.3M+29.2%1.2M1.83
    15 June 20231.8M-8.1%1.0M1.76
    31 May 20231.9M-3.2%977K1.98
    15 May 20232.0M-2.0%1.2M1.71
    28 April 20232.0M+19.8%911K2.24
    14 April 20231.7M-11.5%735K2.31
    31 March 20231.9M+15.4%906K2.12
    15 March 20231.7M+6.7%979K1.70
    28 February 20231.6M+3.3%1.2M1.34
    15 February 20231.5M-6.9%1.0M1.51
    31 January 20231.6M-22.9%912K1.78
    13 January 20232.1M-7.5%872K2.41
    30 December 20222.3M-7.2%701K3.25
    15 December 20222.5M-7.9%933K2.63
    30 November 20222.7M-17.2%516K5.15
    15 November 20223.2M+48.2%1.2M2.71
    31 October 20222.2M-10.4%948K2.29
    14 October 20222.4M+1.8%744K3.25
    30 September 20222.4M-1.7%1.1M2.26
    15 September 20222.4M+1.7%646K3.74
    31 August 20222.4M-29.8%633K3.75
    15 August 20223.4M-2.1%916K3.69
    29 July 20223.5M-9.4%882K3.91
    15 July 20223.8M+66.8%1.0M3.73
    30 June 20222.3M-8.7%1.1M2.17
    15 June 20222.5M+2.5%736K3.40
    31 May 20222.4M+9.7%849K2.87
    13 May 20222.2M+2.3%1.0M2.16
    29 April 20222.2M-17.9%1.0M2.12
    14 April 20222.6M-18.2%1.0M2.59
    31 March 20223.2M-25.9%1.3M2.44
    15 March 20224.4M-14.1%1.4M3.10
    28 February 20225.1M+7.7%1.8M2.86
    15 February 20224.7M-2.7%907K5.21
    31 January 20224.9M+3.9%948K5.12
    14 January 20224.7M+0.5%1.1M4.33
    31 December 20214.6M+3.5%613K7.58
    15 December 20214.5M-8.9%807K5.56
    30 November 20214.9M-15.7%1.0M4.71
    15 November 20215.8M+30.8%834K7.01
    29 October 20214.5M-10.0%878K5.09
    15 October 20215.0M-8.9%746K6.65
    30 September 20215.4M+13.5%1.2M4.64
    15 September 20214.8M+3.4%902K5.32
    31 August 20214.6M-20.9%1.4M3.27
    13 August 20215.9M+14.0%845K6.94
    30 July 20215.1M+5.9%1.0M5.00
    15 July 20214.9M+4.3%883K5.51
    30 June 20214.7M+10.3%1.3M3.53
    15 June 20214.2M-8.1%892K4.74
    28 May 20214.6M+24.7%1.2M3.88
    14 May 20213.7M+3.2%1.1M3.23
    30 April 20213.6M+2.3%1.3M2.71
    15 April 20213.5M+1.2%1.3M2.66
    31 March 20213.5M+9.9%1.4M2.42
    15 March 20213.1M+4.2%1.6M1.97
    26 February 20213.0M-23.7%1.6M1.91
    12 February 20214.0M+9.7%831K4.76
    29 January 20213.6M-5.5%875K4.12
    15 January 20213.8M-4.8%1.3M2.97
    31 December 20204.0M-3.0%820K4.89
    15 December 20204.1M+1.2%1.1M3.88
    30 November 20204.1M-24.7%1.2M3.44
    13 November 20205.4M-7.4%2.1M2.61
    30 October 20205.9M-6.8%1.2M4.95
    15 October 20206.3M+5.1%916K6.86
    30 September 20206.0M-3.0%1.1M5.29
    15 September 20206.2M+6.3%941K6.55
    31 August 20205.8M-9.2%888K6.53
    14 August 20206.4M+22.2%1.2M5.34
    31 July 20205.2M+10.8%1.1M4.80
    15 July 20204.7M+1.4%1.1M4.14
    30 June 20204.7M+2.0%1.4M3.26
    15 June 20204.6M-12.6%1.3M3.42
    29 May 20205.2M+0.7%872K5.99
    15 May 20205.2M+8.0%1.3M3.88
    30 April 20204.8M-11.9%1.6M2.98
    15 April 20205.5M-6.5%1.4M4.03
    31 March 20205.8M-39.0%2.5M2.30
    13 March 20209.6M-12.6%2.8M3.47
    28 February 202010.9M-1.7%1.8M6.21
    14 February 202011.1M-4.2%1.0M10.98
    31 January 202011.6M-2.6%872K13.32
    15 January 202011.9M-0.6%993K12.01
    31 December 201912.0M-2.7%1.1M11.12
    13 December 201912.3M-8.8%1.9M6.66
    29 November 201913.5M-8.6%885K15.27
    15 November 201914.8M+5.0%1.3M11.34
    31 October 201914.1M-1.4%1.4M10.29
    15 October 201914.3M-0.1%1.3M11.23
    30 September 201914.3M-7.8%1.2M12.27
    13 September 201915.5M-6.3%1.5M10.56
    30 August 201916.5M-7.4%1.8M9.13
    15 August 201917.9M-7.0%4.4M4.08
    31 July 201919.2M-2.7%1.6M12.33
    15 July 201919.7M-0.4%1.2M16.68
    28 June 201919.8M+14.0%1.6M12.00
    14 June 201917.4M-1.9%1.6M11.15
    31 May 201917.7M+19.9%2.1M8.47
    15 May 201914.8M+4.6%4.1M3.57
    30 April 201914.1M+9.5%1.9M7.49
    15 April 201912.9M-5.6%1.1M11.66
    29 March 201913.6M+3.9%2.1M6.52
    15 March 201913.1M+2.8%2.4M5.37
    28 February 201912.8M+7.6%5.9M2.18
    15 February 201911.9M+5.2%1.0M11.51
    31 January 201911.3M+6.2%1.8M6.39
    15 January 201910.6M+18.8%1.1M9.74
    31 December 20188.9M+17.6%1.2M7.38
    14 December 20187.6M+14.7%1.2M6.18
    30 November 20186.6M-3.3%814K8.14
    15 November 20186.9M+20.5%923K7.44
    31 October 20185.7M-5.6%1.3M4.44
    15 October 20186.0M+10.0%822K7.33
    28 September 20185.5M-10.9%1.1M4.92
    14 September 20186.1M-5.5%1.4M4.50
    31 August 20186.5M-6.8%551K11.81
    15 August 20187.0M-8.8%706K9.88
    31 July 20187.7M-3.2%1.1M7.20
    13 July 20187.9M-5.6%642K12.31
    29 June 20188.4M-5.3%701K11.94
    15 June 20188.8M+1.8%634K13.95
    31 May 20188.7M-12.7%914K9.50
    15 May 201810.0M-10.7%710K14.02
    30 April 201811.1M-16.4%1.1M10.03
    13 April 201813.3M-0.9%642K20.77
    29 March 201813.5M+1.4%646K20.82
    15 March 201813.3M+2.2%641K20.68
    28 February 201813.0M-2.8%1.1M11.70
    15 February 201813.4M+1.6%1.3M10.08
    31 January 201813.1M-9.1%601K21.88
    12 January 201814.5M+0.6%588K24.58
    29 December 201714.4M468K30.70
    Shares in millions (M) or thousands (K); hold the pointer on a figure for the exact count. Counts before a split are restated to today's shares. FINRA publishes consolidated short interest twice a month, about ten days after each settlement.