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TransDigm Group Inc. short interest

1.0M shares of TransDigm Group were sold short at the 15 October 2026 settlement, near the middle of its range over the last year (835K to 1.3M). Short sellers would need 3.1 days of normal trading to buy them back.

Shares sold short1.0Mat 15 Oct 2026
Change on the settlement before-12.8%-3% over a year
Days to cover3.15at 332K shares a day
Of shares in issue1.89%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 (835K to 1.3M), and the share price moved -3% 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 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20261.0M-12.8%332K3.15
    30 September 20261.2M+12.4%442K2.71
    15 September 20261.1M+18.7%336K3.17
    31 August 2026899K+7.6%358K2.51
    14 August 2026835K-13.2%562K1.49
    31 July 2026962K-10.3%331K2.91
    15 July 20261.1M-6.4%332K3.23
    30 June 20261.1M+1.6%488K2.35
    15 June 20261.1M+7.7%336K3.36
    29 May 20261.0M+6.9%440K2.38
    15 May 2026981K-2.3%398K2.46
    30 April 20261.0M-3.3%422K2.38
    15 April 20261.0M-1.0%314K3.30
    31 March 20261.0M+10.8%476K2.20
    13 March 2026946K-2.9%335K2.83
    27 February 2026975K-13.6%332K2.94
    13 February 20261.1M-9.8%553K2.04
    30 January 20261.3M+3.7%332K3.77
    15 January 20261.2M+8.2%344K3.51
    31 December 20251.1M-7.1%326K3.42
    15 December 20251.2M-7.0%289K4.16
    28 November 20251.3M+8.8%304K4.25
    14 November 20251.2M+4.1%338K3.52
    31 October 20251.1M+5.5%273K4.17
    15 October 20251.1M-4.2%291K3.72
    30 September 20251.1M+7.3%279K4.05
    15 September 20251.1M-2.1%462K2.28
    29 August 20251.1M-4.2%328K3.28
    15 August 20251.1M-0.2%524K2.14
    31 July 20251.1M-8.9%192K5.85
    15 July 20251.2M+2.7%235K5.26
    30 June 20251.2M+7.5%293K4.10
    13 June 20251.1M-2.0%249K4.48
    30 May 20251.1M-10.8%260K4.39
    15 May 20251.3M-3.5%365K3.50
    30 April 20251.3M+10.1%252K5.25
    15 April 20251.2M+4.3%404K2.98
    31 March 20251.2M-5.7%254K4.53
    14 March 20251.2M+19.2%265K4.61
    28 February 20251.0M-7.3%222K4.62
    14 February 20251.1M-0.5%337K3.28
    31 January 20251.1M-0.5%209K5.31
    15 January 20251.1M-5.8%265K4.22
    31 December 20241.2M+34.3%331K3.59
    13 December 2024884K+3.1%274K3.23
    29 November 2024857K-1.4%362K2.37
    15 November 2024869K-2.3%325K2.68
    31 October 2024889K+9.1%175K5.08
    15 October 2024815K+6.1%158K5.14
    30 September 2024767K+4.6%206K3.73
    13 September 2024733K-2.9%150K4.89
    30 August 2024755K-13.8%214K3.52
    15 August 2024876K+11.1%267K3.28
    31 July 2024788K+6.8%213K3.69
    15 July 2024738K-16.6%244K3.03
    28 June 2024884K+7.5%353K2.51
    14 June 2024823K-4.4%212K3.88
    31 May 2024861K-17.9%206K4.18
    15 May 20241.0M+0.2%262K4.00
    30 April 20241.0M+1.5%190K5.51
    15 April 20241.0M+1.3%175K5.88
    28 March 20241.0M-9.0%158K6.45
    15 March 20241.1M-4.3%221K5.05
    29 February 20241.2M+0.5%222K5.27
    15 February 20241.2M+2.6%270K4.31
    31 January 20241.1M+1.5%196K5.78
    12 January 20241.1M+4.6%217K5.15
    29 December 20231.1M-7.7%138K7.72
    15 December 20231.2M+0.2%214K5.40
    30 November 20231.2M-6.2%210K5.50
    15 November 20231.2M+6.3%323K3.80
    31 October 20231.2M-5.1%216K5.35
    13 October 20231.2M+25.3%272K4.48
    29 September 2023974K+0.9%184K5.29
    15 September 2023965K+1.7%251K3.85
    31 August 2023949K-8.0%189K5.01
    15 August 20231.0M-1.1%306K3.37
    31 July 20231.0M-1.2%209K5.00
    14 July 20231.1M-10.7%223K4.73
    30 June 20231.2M+10.1%285K4.15
    15 June 20231.1M-0.9%210K5.11
    31 May 20231.1M-10.0%300K3.61
    15 May 20231.2M+4.7%330K3.65
    28 April 20231.1M-3.6%218K5.26
    14 April 20231.2M+3.2%195K6.11
    31 March 20231.2M-1.7%283K4.08
    15 March 20231.2M-3.3%300K3.91
    28 February 20231.2M-0.5%325K3.74
    15 February 20231.2M-2.9%486K2.51
    31 January 20231.3M-3.6%340K3.70
    13 January 20231.3M-1.6%320K4.08
    30 December 20221.3M-5.6%238K5.57
    15 December 20221.4M-6.0%302K4.65
    30 November 20221.5M-9.5%246K6.08
    15 November 20221.7M-8.5%325K5.09
    31 October 20221.8M-3.1%244K7.40
    14 October 20221.9M+21.4%262K7.11
    30 September 20221.5M+33.9%297K5.18
    15 September 20221.1M+9.7%215K5.34
    31 August 20221.0M-0.4%264K3.97
    15 August 20221.1M+6.1%263K4.00
    29 July 2022990K-6.5%274K3.62
    15 July 20221.1M-2.1%233K4.54
    30 June 20221.1M-3.5%392K2.76
    15 June 20221.1M-2.8%289K3.88
    31 May 20221.2M+11.1%470K2.46
    13 May 20221.0M+12.8%421K2.47
    29 April 2022922K-19.0%254K3.63
    14 April 20221.1M-15.0%268K4.26
    31 March 20221.3M+25.3%324K4.13
    15 March 20221.1M+1.8%452K2.36
    28 February 20221.1M+1.6%307K3.42
    15 February 20221.0M+6.1%308K3.35
    31 January 2022974K+4.0%278K3.51
    14 January 2022936K+13.5%292K3.20
    31 December 2021824K+0.7%197K4.18
    15 December 2021819K-68.1%326K2.51
    30 November 20212.6M-0.8%576K4.45
    15 November 20212.6M+8.8%261K9.91
    29 October 20212.4M+7.1%204K11.63
    15 October 20212.2M+3.6%217K10.20
    30 September 20212.1M+2.5%302K7.09
    15 September 20212.1M+4.6%261K7.99
    31 August 20212.0M-5.5%195K10.22
    13 August 20212.1M+5.6%228K9.25
    30 July 20212.0M-0.3%186K10.73
    15 July 20212.0M-8.0%184K10.92
    30 June 20212.2M-3.2%295K7.40
    15 June 20212.3M+8.0%357K6.31
    28 May 20212.1M+1.4%274K7.61
    14 May 20212.1M-1.1%266K7.74
    30 April 20212.1M+8.1%213K9.77
    15 April 20211.9M-4.3%189K10.17
    31 March 20212.0M+1.1%204K9.88
    15 March 20212.0M+6.4%240K8.29
    26 February 20211.9M-1.8%234K8.01
    12 February 20211.9M-4.2%310K6.14
    29 January 20212.0M-2.9%328K6.06
    15 January 20212.0M+1.4%187K10.96
    31 December 20202.0M-3.2%212K9.53
    15 December 20202.1M-4.6%245K8.51
    30 November 20202.2M-6.9%309K7.08
    13 November 20202.3M-3.7%401K5.86
    30 October 20202.4M+3.3%388K6.29
    15 October 20202.4M-15.4%338K6.98
    30 September 20202.8M+2.6%476K5.86
    15 September 20202.7M+2.2%334K8.15
    31 August 20202.7M-0.3%377K7.07
    14 August 20202.7M-1.0%460K5.81
    31 July 20202.7M+0.2%289K9.35
    15 July 20202.7M-17.0%422K6.38
    30 June 20203.2M+0.3%570K5.69
    15 June 20203.2M-1.2%722K4.48
    29 May 20203.3M-5.7%731K4.48
    15 May 20203.5M-0.3%705K4.92
    30 April 20203.5M-1.9%614K5.67
    15 April 20203.5M+8.3%1.0M3.47
    31 March 20203.3M+19.6%1.4M2.28
    13 March 20202.7M+34.8%872K3.14
    28 February 20202.0M-2.3%501K4.06
    14 February 20202.1M-11.0%367K5.68
    31 January 20202.3M-9.1%319K7.34
    15 January 20202.6M-9.4%292K8.83
    31 December 20192.8M+5.3%284K9.99
    13 December 20192.7M-3.7%263K10.26
    29 November 20192.8M+1.8%356K7.86
    15 November 20192.8M+2.2%223K12.32
    31 October 20192.7M+7.5%239K11.26
    15 October 20192.5M-1.3%234K10.71
    30 September 20192.5M+0.8%300K8.45
    13 September 20192.5M+1.8%388K6.49
    30 August 20192.5M-11.4%428K5.78
    15 August 20192.8M+3.1%396K7.05
    31 July 20192.7M+5.1%222K12.18
    15 July 20192.6M+2.4%240K10.72
    28 June 20192.5M-2.6%311K8.08
    14 June 20192.6M+6.4%312K8.27
    31 May 20192.4M+4.9%291K8.34
    15 May 20192.3M+3.8%360K6.42
    30 April 20192.2M-1.8%261K8.54
    15 April 20192.3M-10.1%286K7.93
    29 March 20192.5M+12.5%318K7.95
    15 March 20192.2M+5.0%482K4.66
    28 February 20192.1M-8.2%390K5.49
    15 February 20192.3M-6.0%441K5.28
    31 January 20192.5M-5.2%378K6.56
    15 January 20192.6M-7.0%318K8.23
    31 December 20182.8M+0.9%415K6.77
    14 December 20182.8M+2.8%395K7.07
    30 November 20182.7M+1.9%415K6.53
    15 November 20182.7M-10.7%513K5.19
    31 October 20183.0M+21.6%572K5.21
    15 October 20182.5M-5.1%511K4.80
    28 September 20182.6M-16.9%320K8.06
    14 September 20183.1M+7.9%338K9.20
    31 August 20182.9M-2.9%294K9.80
    15 August 20183.0M-15.0%437K6.80
    31 July 20183.5M-9.7%307K11.35
    13 July 20183.9M-8.5%283K13.67
    29 June 20184.2M+1.2%415K10.18
    15 June 20184.2M-5.9%297K14.06
    31 May 20184.4M+9.5%296K14.94
    15 May 20184.0M-9.5%398K10.17
    30 April 20184.5M-5.8%414K10.80
    13 April 20184.7M-1.8%396K11.98
    29 March 20184.8M+7.9%508K9.50
    15 March 20184.5M-6.6%793K5.64
    28 February 20184.8M-11.2%366K13.11
    15 February 20185.4M-5.3%642K8.41
    31 January 20185.7M-1.8%392K14.54
    12 January 20185.8M-2.8%465K12.50
    29 December 20176.0M284K21.03
    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.