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Stock research / United States / ACGL / Short interest

Arch Capital Group Ltd. short interest

8.8M shares of Arch Capital Group were sold short at the 15 October 2026 settlement, near the top of its range over the last year (5.3M to 8.9M). Short sellers would need 3.7 days of normal trading to buy them back.

Shares sold short8.8Mat 15 Oct 2026
Change on the settlement before+14.4%+49% over a year
Days to cover3.70at 2.4M shares a day
Of shares in issue2.70%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 (5.3M to 8.9M), and the share price moved +20% 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 20268.8M+14.4%2.4M3.70
    30 September 20267.7M+5.8%4.7M1.63
    15 September 20267.3M-1.1%3.9M1.88
    31 August 20267.3M+0.6%1.9M3.88
    14 August 20267.3M-9.5%1.5M4.87
    31 July 20268.1M-8.4%2.0M3.96
    15 July 20268.8M+6.3%1.6M5.50
    30 June 20268.3M-6.9%2.4M3.44
    15 June 20268.9M+1.1%2.3M3.93
    29 May 20268.8M+8.9%2.7M3.28
    15 May 20268.1M+17.1%2.5M3.28
    30 April 20266.9M+6.8%2.3M3.00
    15 April 20266.5M+13.5%1.8M3.67
    31 March 20265.7M+8.3%2.0M2.88
    13 March 20265.3M-3.8%1.6M3.38
    27 February 20265.5M-2.3%1.6M3.34
    13 February 20265.6M-20.7%2.1M2.64
    30 January 20267.1M+21.5%2.6M2.72
    15 January 20265.8M-2.0%2.0M2.91
    31 December 20255.9M-4.9%2.1M2.76
    15 December 20256.2M+1.2%2.3M2.66
    28 November 20256.2M+8.3%1.7M3.68
    14 November 20255.7M+8.2%2.3M2.44
    31 October 20255.3M-11.1%2.7M1.98
    15 October 20255.9M+8.3%1.7M3.48
    30 September 20255.5M-3.5%2.4M2.31
    15 September 20255.7M+13.8%1.9M3.02
    29 August 20255.0M-18.4%1.6M3.11
    15 August 20256.1M+29.8%2.2M2.76
    31 July 20254.7M+19.0%3.0M1.57
    15 July 20253.9M-2.6%2.8M1.42
    30 June 20254.0M-0.3%1.8M2.24
    13 June 20254.1M+7.4%1.4M2.91
    30 May 20253.8M-1.6%1.4M2.63
    15 May 20253.8M+19.0%1.5M2.64
    30 April 20253.2M-35.1%1.5M2.12
    15 April 20255.0M-6.2%2.0M2.53
    31 March 20255.3M+18.9%1.8M3.03
    14 March 20254.5M-4.2%1.6M2.71
    28 February 20254.7M-4.1%1.8M2.60
    14 February 20254.9M+2.4%2.0M2.46
    31 January 20254.7M-14.3%2.0M2.40
    15 January 20255.5M-8.0%1.9M2.94
    31 December 20246.0M+11.7%1.9M3.18
    13 December 20245.4M+6.9%1.6M3.30
    29 November 20245.0M-14.7%1.9M2.65
    15 November 20245.9M+31.3%2.4M2.47
    31 October 20244.5M-15.2%1.9M2.41
    15 October 20245.3M+3.3%1.8M2.96
    30 September 20245.1M-5.7%1.5M3.47
    13 September 20245.4M+0.1%1.4M4.03
    30 August 20245.4M+6.6%1.2M4.39
    15 August 20245.1M+12.5%1.5M3.37
    31 July 20244.5M-4.7%1.2M3.88
    15 July 20244.8M-9.4%1.3M3.55
    28 June 20245.3M+3.4%1.9M2.77
    14 June 20245.1M+18.7%1.3M3.98
    31 May 20244.3M-7.3%2.4M1.80
    15 May 20244.6M+10.8%1.4M3.29
    30 April 20244.2M-1.9%1.6M2.53
    15 April 20244.2M+20.5%1.6M2.60
    28 March 20243.5M+21.0%2.0M1.77
    15 March 20242.9M-3.1%1.7M1.75
    29 February 20243.0M-11.9%1.9M1.57
    15 February 20243.4M+8.9%1.7M2.04
    31 January 20243.1M-7.5%1.5M2.05
    12 January 20243.4M-10.3%1.7M1.99
    29 December 20233.8M-7.1%1.4M2.61
    15 December 20234.1M+11.2%2.1M1.95
    30 November 20233.7M-0.1%1.9M1.95
    15 November 20233.7M-6.8%2.4M1.51
    31 October 20233.9M-14.6%2.1M1.89
    13 October 20234.6M+2.6%1.6M2.91
    29 September 20234.5M-10.6%1.7M2.59
    15 September 20235.0M-0.9%1.3M3.77
    31 August 20235.1M-0.3%1.6M3.08
    15 August 20235.1M-6.1%1.4M3.51
    31 July 20235.4M+31.4%3.1M1.74
    14 July 20234.1M+9.1%1.7M2.44
    30 June 20233.8M-1.6%2.0M1.90
    15 June 20233.8M-8.3%1.7M2.19
    31 May 20234.2M-19.7%2.0M2.13
    15 May 20235.2M+19.2%1.8M2.84
    28 April 20234.4M-27.6%1.9M2.28
    14 April 20236.0M+1.1%1.8M3.32
    31 March 20236.0M-10.0%2.2M2.67
    15 March 20236.6M+19.0%3.0M2.21
    28 February 20235.6M-2.6%2.0M2.75
    15 February 20235.7M-14.1%2.3M2.48
    31 January 20236.7M-13.1%1.4M4.92
    13 January 20237.7M-7.3%1.5M4.99
    30 December 20228.3M-8.7%1.9M4.40
    15 December 20229.0M-13.0%1.9M4.87
    30 November 202210.4M+16.2%1.8M5.77
    15 November 20229.0M+123.1%3.7M2.40
    31 October 20224.0M+5.6%11.3M1.00
    14 October 20223.8M+3.1%2.2M1.76
    30 September 20223.7M+12.4%1.9M1.89
    15 September 20223.3M-15.9%1.1M3.05
    31 August 20223.9M+20.9%985K3.95
    15 August 20223.2M+16.1%1.2M2.63
    29 July 20222.8M-29.3%1.5M1.84
    15 July 20223.9M+7.6%2.6M1.50
    30 June 20223.6M-2.9%2.0M1.83
    15 June 20223.8M+1.0%1.3M2.79
    31 May 20223.7M+2.3%1.7M2.24
    13 May 20223.6M+8.3%2.2M1.62
    29 April 20223.4M-34.0%2.2M1.51
    14 April 20225.1M+5.9%2.3M2.19
    31 March 20224.8M+40.8%2.0M2.41
    15 March 20223.4M+9.0%2.1M1.63
    28 February 20223.1M+8.6%1.8M1.72
    15 February 20222.9M-1.0%1.8M1.58
    31 January 20222.9M+11.4%1.7M1.68
    14 January 20222.6M+8.9%1.6M1.62
    31 December 20212.4M-9.9%1.2M1.97
    15 December 20212.7M-1.0%1.5M1.75
    30 November 20212.7M+3.1%1.7M1.62
    15 November 20212.6M-15.4%2.5M1.06
    29 October 20213.1M-24.2%1.4M2.28
    15 October 20214.1M-25.0%1.8M2.27
    30 September 20215.4M+2.6%2.5M2.15
    15 September 20215.3M+3.2%2.1M2.54
    31 August 20215.1M+5.0%1.5M3.35
    13 August 20214.9M+4.2%1.5M3.20
    30 July 20214.7M-5.7%1.8M2.57
    15 July 20215.0M-13.3%1.5M3.22
    30 June 20215.7M-1.1%2.2M2.55
    15 June 20215.8M+21.6%1.7M3.37
    28 May 20214.8M-5.1%1.3M3.72
    14 May 20215.0M+17.0%1.5M3.36
    30 April 20214.3M-10.7%1.2M3.55
    15 April 20214.8M+14.7%1.3M3.56
    31 March 20214.2M+13.7%1.6M2.64
    15 March 20213.7M+7.7%3.2M1.15
    26 February 20213.4M-10.1%3.6M1.00
    12 February 20213.8M+7.9%3.0M1.28
    29 January 20213.5M-13.8%3.2M1.09
    15 January 20214.1M-3.0%2.2M1.90
    31 December 20204.2M+14.7%1.8M2.30
    15 December 20203.7M-8.4%2.1M1.80
    30 November 20204.0M+5.7%1.7M2.32
    13 November 20203.8M+31.7%1.8M2.16
    30 October 20202.9M-14.7%1.7M1.72
    15 October 20203.4M+15.1%1.1M2.96
    30 September 20202.9M-0.1%1.8M1.62
    15 September 20202.9M+4.6%1.2M2.49
    31 August 20202.8M-16.6%938K3.00
    14 August 20203.4M+13.8%1.2M2.75
    31 July 20203.0M-12.1%1.5M1.95
    15 July 20203.4M+4.0%1.5M2.25
    30 June 20203.2M+6.6%2.4M1.36
    15 June 20203.0M-15.8%2.2M1.40
    29 May 20203.6M+8.4%2.5M1.43
    15 May 20203.3M+42.4%2.4M1.37
    30 April 20202.3M+0.2%2.0M1.16
    15 April 20202.3M+3.2%2.1M1.10
    31 March 20202.3M-10.1%3.6M1.00
    13 March 20202.5M-16.1%1.5M1.71
    28 February 20203.0M+12.9%1.6M1.87
    14 February 20202.7M-15.5%1.4M1.94
    31 January 20203.1M+2.2%1.4M2.29
    15 January 20203.1M+1.7%1.1M2.85
    31 December 20193.0M+6.8%927K3.26
    13 December 20192.8M-8.8%1.1M2.54
    29 November 20193.1M-16.9%2.3M1.38
    15 November 20193.7M+11.0%1.3M2.88
    31 October 20193.4M+7.4%1.3M2.62
    15 October 20193.1M+14.9%1.2M2.68
    30 September 20192.7M-11.7%1.5M1.81
    13 September 20193.1M+1.5%1.3M2.30
    30 August 20193.0M-5.0%1.1M2.85
    15 August 20193.2M-19.7%1.3M2.55
    31 July 20194.0M-13.4%1.3M3.18
    15 July 20194.6M+20.4%1.2M3.80
    28 June 20193.8M+8.1%1.4M2.65
    14 June 20193.5M-8.8%1.4M2.48
    31 May 20193.9M+4.7%1.4M2.84
    15 May 20193.7M-15.8%1.1M3.41
    30 April 20194.4M-5.5%1.2M3.82
    15 April 20194.7M+20.4%927K5.02
    29 March 20193.9M-18.9%1.4M2.72
    15 March 20194.8M+5.1%991K4.81
    28 February 20194.5M+8.7%1.3M3.40
    15 February 20194.2M+15.1%1.1M3.68
    31 January 20193.6M+11.1%945K3.84
    15 January 20193.3M-1.5%910K3.58
    31 December 20183.3M+6.1%1.4M2.42
    14 December 20183.1M-19.9%1.2M2.70
    30 November 20183.9M+0.0%1.0M3.80
    15 November 20183.9M+14.0%1.1M3.63
    31 October 20183.4M-16.1%1.1M3.07
    15 October 20184.1M-23.4%918K4.43
    28 September 20185.3M+7.1%1.3M4.15
    14 September 20185.0M-24.7%1.0M4.88
    31 August 20186.6M+14.4%743K8.88
    15 August 20185.8M-7.6%984K5.86
    31 July 20186.2M+11.4%1.3M4.72
    13 July 20185.6M+17.2%1.4M3.87
    29 June 20184.8M-38.0%1.9M2.47
    15 June 20187.7M+27.9%2.5M3.12
    31 May 20186.0M-10.8%1.6M3.88
    15 May 20186.8M+3.1%2.5M2.75
    30 April 20186.6M-6.7%1.5M4.44
    13 April 20187.0M+6.8%2.0M3.45
    29 March 20186.6M+22.0%2.3M2.88
    15 March 20185.4M-22.8%3.4M1.60
    28 February 20187.0M+3.1%1.6M4.41
    15 February 20186.8M-13.8%1.8M3.87
    31 January 20187.9M-2.0%1.5M5.12
    12 January 20188.0M+9.9%1.7M4.72
    29 December 20177.3M1.1M6.83
    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.