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Old Second Bancorp Inc. short interest

3.0M shares of Old Second Bancorp were sold short at the 15 October 2026 settlement, the most at any settlement since 29 Dec 2017, when our record starts. Short sellers would need 4.8 days of normal trading to buy them back.

Shares sold short3.0Mat 15 Oct 2026
Change on the settlement before+10.8%+189% over a year
Days to cover4.80at 634K shares a day
Of shares in issue5.97%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 most at any settlement since 29 Dec 2017, when our record starts, and the share price moved +38% 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 20263.0M+10.8%634K4.80
    30 September 20262.7M+11.2%513K5.36
    15 September 20262.5M+23.3%436K5.67
    31 August 20262.0M+9.5%361K5.55
    14 August 20261.8M+7.1%421K4.34
    31 July 20261.7M-1.3%503K3.39
    15 July 20261.7M-12.2%343K5.05
    30 June 20262.0M+13.6%492K4.00
    15 June 20261.7M+1.3%297K5.83
    29 May 20261.7M+1.0%341K5.02
    15 May 20261.7M-4.3%370K4.58
    30 April 20261.8M+24.6%492K3.60
    15 April 20261.4M-18.6%397K3.58
    31 March 20261.7M+11.0%403K4.34
    13 March 20261.6M+40.0%406K3.87
    27 February 20261.1M-23.1%298K3.77
    13 February 20261.5M+28.8%324K4.51
    30 January 20261.1M+1.7%423K2.68
    15 January 20261.1M+17.6%331K3.36
    31 December 2025948K-2.6%248K3.82
    15 December 2025973K-15.7%295K3.29
    28 November 20251.2M-6.5%257K4.50
    14 November 20251.2M+7.8%327K3.78
    31 October 20251.1M+9.0%486K2.36
    15 October 20251.1M+4.2%302K3.48
    30 September 20251.0M+112.3%423K2.38
    15 September 2025475K+17.3%224K2.12
    29 August 2025405K+0.8%176K2.30
    15 August 2025402K-4.8%174K2.31
    31 July 2025422K+7.9%239K1.76
    15 July 2025391K-7.3%252K1.55
    30 June 2025422K-13.2%239K1.77
    13 June 2025486K+4.9%173K2.81
    30 May 2025463K-42.7%202K2.29
    15 May 2025809K+63.7%219K3.69
    30 April 2025494K-19.5%219K2.26
    15 April 2025613K+0.3%258K2.38
    31 March 2025612K+22.0%226K2.70
    14 March 2025501K+23.9%201K2.50
    28 February 2025405K+36.9%249K1.62
    14 February 2025296K-3.0%186K1.59
    31 January 2025305K-40.9%277K1.10
    15 January 2025516K-9.1%245K2.11
    31 December 2024567K+6.4%272K2.09
    13 December 2024533K+60.1%206K2.58
    29 November 2024333K+4.1%204K1.63
    15 November 2024319K+29.4%343K1.00
    31 October 2024247K-56.4%317K1.00
    15 October 2024566K-38.2%226K2.51
    30 September 2024916K+22.5%305K3.00
    13 September 2024748K+2.4%268K2.80
    30 August 2024730K+15.8%328K2.23
    15 August 2024631K+4.0%215K2.94
    31 July 2024607K-13.8%361K1.68
    15 July 2024704K-4.6%298K2.36
    28 June 2024737K+0.2%250K2.95
    14 June 2024736K+10.6%145K5.06
    31 May 2024665K-11.6%174K3.82
    15 May 2024752K-6.1%189K3.98
    30 April 2024802K+16.0%219K3.66
    15 April 2024691K+10.0%172K4.02
    28 March 2024628K-1.5%137K4.59
    15 March 2024638K+1.2%149K4.30
    29 February 2024631K+7.5%115K5.49
    15 February 2024587K+2.4%243K2.42
    31 January 2024574K+3.8%206K2.78
    12 January 2024553K+4.7%155K3.58
    29 December 2023528K+18.1%185K2.85
    15 December 2023447K-2.0%259K1.73
    30 November 2023456K-2.5%196K2.32
    15 November 2023467K+11.7%124K3.78
    31 October 2023418K+12.0%133K3.14
    13 October 2023374K-18.6%124K3.02
    29 September 2023459K+5.7%125K3.68
    15 September 2023434K-9.4%191K2.27
    31 August 2023479K+8.0%122K3.92
    15 August 2023444K+6.8%137K3.23
    31 July 2023416K-16.6%202K2.05
    14 July 2023498K+3.5%137K3.63
    30 June 2023481K-6.2%158K3.04
    15 June 2023513K-10.9%167K3.07
    31 May 2023576K-11.9%161K3.58
    15 May 2023653K-0.5%223K2.93
    28 April 2023657K+32.7%214K3.06
    14 April 2023495K+1.1%158K3.14
    31 March 2023489K+11.5%205K2.38
    15 March 2023439K-13.5%225K1.95
    28 February 2023508K-9.9%141K3.61
    15 February 2023564K-9.6%152K3.72
    31 January 2023623K+2.7%220K2.83
    13 January 2023607K+10.2%159K3.81
    30 December 2022551K-14.3%151K3.64
    15 December 2022642K+16.4%138K4.65
    30 November 2022552K-8.1%114K4.85
    15 November 2022601K-17.2%233K2.58
    31 October 2022726K-8.9%187K3.88
    14 October 2022797K-3.2%122K6.52
    30 September 2022823K-13.4%133K6.21
    15 September 2022950K+11.3%121K7.85
    31 August 2022853K-11.2%113K7.53
    15 August 2022961K-2.9%197K4.89
    29 July 2022989K-9.2%213K4.65
    15 July 20221.1M+3.4%170K6.43
    30 June 20221.1M+32.2%519K2.03
    15 June 2022797K+3.3%247K3.22
    31 May 2022771K+3.2%232K3.33
    13 May 2022748K+15.6%162K4.63
    29 April 2022647K-7.8%175K3.70
    14 April 2022701K-6.7%175K4.00
    31 March 2022752K+93.7%327K2.30
    15 March 2022388K+21.1%157K2.47
    28 February 2022320K+11.3%184K1.74
    15 February 2022288K+67.8%202K1.43
    31 January 2022172K+23.9%174K1.00
    14 January 2022138K+11.0%193K1.00
    31 December 2021125K-68.4%101K1.24
    15 December 2021395K-29.7%135K2.93
    30 November 2021562K-5.4%81K6.90
    15 November 2021594K-0.7%74K8.08
    29 October 2021599K-1.9%162K3.69
    15 October 2021610K+4.1%81K7.52
    30 September 2021586K+15.8%140K4.19
    15 September 2021506K+13.8%188K2.69
    31 August 2021445K+9.4%122K3.65
    13 August 2021406K+0.1%154K2.63
    30 July 2021406K-1.6%149K2.73
    15 July 2021412K+17.3%71K5.81
    30 June 2021351K-11.5%159K2.21
    15 June 2021397K+6.1%85K4.65
    28 May 2021374K-12.9%80K4.70
    14 May 2021430K+24.3%89K4.81
    30 April 2021346K-10.1%82K4.21
    15 April 2021385K+7.5%104K3.68
    31 March 2021358K-1.6%137K2.61
    15 March 2021364K+24.0%100K3.66
    26 February 2021293K+7.2%67K4.37
    12 February 2021274K+21.8%77K3.56
    29 January 2021225K+7.2%65K3.45
    15 January 2021210K-18.6%53K3.95
    31 December 2020258K+1.4%73K3.52
    15 December 2020254K-17.0%51K5.00
    30 November 2020306K-5.7%48K6.42
    13 November 2020324K-3.3%61K5.35
    30 October 2020335K-5.4%51K6.55
    15 October 2020355K+3.8%55K6.44
    30 September 2020342K-15.5%68K4.99
    15 September 2020404K+9.0%63K6.38
    31 August 2020371K+20.0%61K6.05
    14 August 2020309K-15.4%50K6.13
    31 July 2020365K+2.7%78K4.66
    15 July 2020356K-18.7%85K4.17
    30 June 2020438K+62.2%132K3.32
    15 June 2020270K+5.0%159K1.70
    29 May 2020257K+10.6%140K1.84
    15 May 2020232K+133.4%146K1.60
    30 April 2020100K-45.5%136K1.00
    15 April 2020183K+46.8%145K1.26
    31 March 2020124K-42.2%185K1.00
    13 March 2020215K+32.6%114K1.89
    28 February 2020162K-22.3%130K1.24
    14 February 2020209K-56.5%90K2.33
    31 January 2020480K+1247.2%184K2.61
    15 January 202036K-54.8%67K1.00
    31 December 201979K+10.4%69K1.14
    13 December 201971K-66.6%68K1.04
    29 November 2019214K-16.0%54K3.99
    15 November 2019255K-4.8%68K3.75
    31 October 2019268K-6.3%53K5.08
    15 October 2019286K-6.6%50K5.74
    30 September 2019306K-15.3%91K3.37
    13 September 2019361K+2.4%83K4.34
    30 August 2019353K+9.9%47K7.50
    15 August 2019321K-0.9%64K4.99
    31 July 2019324K+84.6%80K4.04
    15 July 2019175K-21.3%34K5.20
    28 June 2019223K+51.2%62K3.58
    14 June 2019147K-8.0%54K2.74
    31 May 2019160K+2.7%46K3.49
    15 May 2019156K+27.1%39K4.03
    30 April 2019123K-8.8%70K1.76
    15 April 2019135K-46.8%56K2.39
    29 March 2019253K+22.9%88K2.89
    15 March 2019206K-20.3%50K4.13
    28 February 2019258K-8.4%51K5.04
    15 February 2019282K-0.3%49K5.78
    31 January 2019283K+2.8%99K2.86
    15 January 2019275K+2.5%103K2.68
    31 December 2018268K+18.2%137K1.96
    14 December 2018227K-7.5%91K2.48
    30 November 2018245K+17.2%66K3.74
    15 November 2018209K+101.3%66K3.16
    31 October 2018104K-23.7%132K1.00
    15 October 2018136K-38.3%105K1.29
    28 September 2018221K+46.1%192K1.15
    14 September 2018151K+16.5%64K2.37
    31 August 2018130K+6.0%64K2.02
    15 August 2018122K+76.2%61K2.02
    31 July 201869K+31.2%110K1.00
    13 July 201853K-43.5%84K1.00
    29 June 201894K+19.3%146K1.00
    15 June 201878K+7.6%84K1.00
    31 May 201873K-6.9%62K1.17
    15 May 201878K-14.2%42K1.88
    30 April 201891K-13.2%45K2.03
    13 April 2018105K-11.9%54K1.96
    29 March 2018119K-81.5%102K1.17
    15 March 2018644K+0.8%51K12.58
    28 February 2018639K+0.4%191K3.35
    15 February 2018637K+8.4%72K8.89
    31 January 2018588K+0.7%72K8.17
    12 January 2018583K+8.1%105K5.56
    29 December 2017540K100K5.38
    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.