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Ribbon Communications Inc. short interest

5.2M shares of Ribbon Communications 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 3.4 days of normal trading to buy them back.

Shares sold short5.2Mat 15 Oct 2026
Change on the settlement before+3.8%+70% over a year
Days to cover3.40at 1.5M shares a day
Of shares in issue2.91%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 -61% 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 20265.2M+3.8%1.5M3.40
    30 September 20265.0M-2.3%1.2M4.02
    15 September 20265.1M+8.6%726K7.07
    31 August 20264.7M+6.8%667K7.08
    14 August 20264.4M+9.7%598K7.40
    31 July 20264.0M-3.1%833K4.85
    15 July 20264.2M+14.0%824K5.05
    30 June 20263.6M-4.7%860K4.24
    15 June 20263.8M-1.8%798K4.80
    29 May 20263.9M+9.9%1.5M2.56
    15 May 20263.5M+3.5%681K5.20
    30 April 20263.4M+7.3%1.1M2.98
    15 April 20263.2M+1.3%1.0M3.06
    31 March 20263.2M+4.9%534K5.90
    13 March 20263.0M-10.8%764K3.93
    27 February 20263.4M-9.1%1.1M3.16
    13 February 20263.7M+6.1%1.6M2.39
    30 January 20263.5M+3.4%435K8.03
    15 January 20263.4M+0.8%601K5.62
    31 December 20253.4M+4.2%579K5.79
    15 December 20253.2M+2.6%704K4.57
    28 November 20253.1M-3.7%747K4.20
    14 November 20253.3M+3.8%671K4.85
    31 October 20253.1M+2.5%988K3.17
    15 October 20253.1M-6.8%595K5.14
    30 September 20253.3M-2.5%508K6.46
    15 September 20253.4M+9.0%681K4.94
    29 August 20253.1M-2.6%448K6.89
    15 August 20253.2M+13.0%529K5.99
    31 July 20252.8M+3.3%652K4.30
    15 July 20252.7M+22.6%388K7.00
    30 June 20252.2M+3.5%562K3.94
    13 June 20252.1M+15.8%791K2.70
    30 May 20251.8M+3.3%379K4.87
    15 May 20251.8M-15.4%563K3.18
    30 April 20252.1M-3.2%485K4.36
    15 April 20252.2M-4.3%512K4.26
    31 March 20252.3M+13.7%455K5.02
    14 March 20252.0M+16.2%590K3.40
    28 February 20251.7M+11.5%696K2.48
    14 February 20251.5M-7.1%936K1.66
    31 January 20251.7M+2.3%441K3.78
    15 January 20251.6M+3.7%312K5.22
    31 December 20241.6M+4.9%412K3.82
    13 December 20241.5M-3.2%452K3.32
    29 November 20241.5M+0.2%309K5.01
    15 November 20241.5M+20.3%355K4.35
    31 October 20241.3M-1.4%377K3.41
    15 October 20241.3M-0.5%189K6.88
    30 September 20241.3M-12.5%279K4.70
    13 September 20241.5M-6.4%189K7.92
    30 August 20241.6M+2.7%231K6.91
    15 August 20241.6M-12.0%306K5.08
    31 July 20241.8M-21.3%577K3.07
    15 July 20242.2M-2.9%351K6.41
    28 June 20242.3M-5.4%341K6.78
    14 June 20242.4M-12.6%200K12.21
    31 May 20242.8M-10.9%241K11.63
    15 May 20243.1M-5.8%277K11.33
    30 April 20243.3M-2.9%784K4.25
    15 April 20243.4M-2.9%261K13.16
    28 March 20243.5M-5.3%325K10.88
    15 March 20243.7M+0.7%386K9.67
    29 February 20243.7M-3.9%556K6.67
    15 February 20243.9M+5.1%537K7.18
    31 January 20243.7M+3.9%372K9.86
    12 January 20243.5M+5.4%365K9.67
    29 December 20233.3M+3.0%499K6.71
    15 December 20233.3M+6.1%471K6.91
    30 November 20233.1M+0.7%303K10.11
    15 November 20233.0M-1.9%389K7.82
    31 October 20233.1M+1.2%563K5.51
    13 October 20233.1M+0.7%412K7.43
    29 September 20233.0M-6.9%248K12.28
    15 September 20233.3M+8.0%482K6.78
    31 August 20233.0M-2.2%305K9.92
    15 August 20233.1M-1.3%339K9.13
    31 July 20233.1M-5.0%864K3.63
    14 July 20233.3M+5.3%377K8.76
    30 June 20233.1M+31.9%736K4.26
    15 June 20232.4M+22.9%438K5.43
    31 May 20231.9M-15.2%656K2.95
    15 May 20232.3M-3.2%527K4.33
    28 April 20232.4M+11.6%807K2.92
    14 April 20232.1M+23.9%892K2.37
    31 March 20231.7M-23.9%1.7M1.00
    15 March 20232.2M-4.5%1.1M2.07
    28 February 20232.3M-17.0%1.1M2.14
    15 February 20232.8M-13.6%452K6.25
    31 January 20233.3M+10.3%539K6.07
    13 January 20233.0M-13.7%347K8.55
    30 December 20223.4M+8.5%850K4.04
    15 December 20223.2M+11.1%989K3.20
    30 November 20222.8M-15.4%539K5.29
    15 November 20223.4M-1.6%485K6.95
    31 October 20223.4M-1.4%448K7.64
    14 October 20223.5M-0.8%325K10.69
    30 September 20223.5M+30.6%1.2M2.91
    15 September 20222.7M+63.4%797K3.36
    31 August 20221.6M+8.3%462K3.55
    15 August 20221.5M-36.5%401K3.77
    29 July 20222.4M-4.6%301K7.91
    15 July 20222.5M+0.4%251K9.95
    30 June 20222.5M+1.2%798K3.12
    15 June 20222.5M+61.4%806K3.05
    31 May 20221.5M-7.3%401K3.80
    13 May 20221.6M-0.3%305K5.39
    29 April 20221.7M+0.1%260K6.35
    14 April 20221.6M-1.1%279K5.90
    31 March 20221.7M+10.6%579K2.88
    15 March 20221.5M+11.3%736K2.05
    28 February 20221.4M+4.2%1.1M1.22
    15 February 20221.3M+37.9%346K3.76
    31 January 2022944K-6.8%531K1.78
    14 January 20221.0M-2.4%436K2.32
    31 December 20211.0M-22.7%415K2.50
    15 December 20211.3M+19.2%407K3.29
    30 November 20211.1M-6.1%215K5.24
    15 November 20211.2M-5.1%289K4.15
    29 October 20211.3M+6.2%441K2.86
    15 October 20211.2M+0.3%211K5.64
    30 September 20211.2M-13.2%366K3.24
    15 September 20211.4M-5.2%366K3.74
    31 August 20211.4M-14.6%391K3.68
    13 August 20211.7M+1.7%625K2.70
    30 July 20211.7M-10.2%302K5.48
    15 July 20211.8M-3.6%214K8.64
    30 June 20211.9M-17.9%465K4.13
    15 June 20212.3M+5.9%321K7.27
    28 May 20212.2M-2.4%307K7.18
    14 May 20212.3M+57.2%490K4.61
    30 April 20211.4M-3.3%513K2.80
    15 April 20211.5M-2.7%351K4.23
    31 March 20211.5M-12.6%589K2.59
    15 March 20211.7M-8.1%1.6M1.12
    26 February 20211.9M+17.8%788K2.41
    12 February 20211.6M+10.2%980K1.65
    29 January 20211.5M-4.7%470K3.11
    15 January 20211.5M-15.7%310K4.95
    31 December 20201.8M+6.6%389K4.68
    15 December 20201.7M+9.9%920K1.86
    30 November 20201.6M-32.2%842K1.84
    13 November 20202.3M+0.1%257K8.92
    30 October 20202.3M-1.4%159K14.37
    15 October 20202.3M-7.0%209K11.12
    30 September 20202.5M-0.1%369K6.78
    15 September 20202.5M-1.3%289K8.66
    31 August 20202.5M+0.9%209K12.14
    14 August 20202.5M+4.0%397K6.34
    31 July 20202.4M-10.2%143K16.94
    15 July 20202.7M+3.3%251K10.70
    30 June 20202.6M+50.1%587K4.44
    15 June 20201.7M-6.1%332K5.24
    29 May 20201.8M-7.3%372K4.97
    15 May 20202.0M-0.9%404K4.94
    30 April 20202.0M-8.9%389K5.17
    15 April 20202.2M+1.0%369K5.99
    31 March 20202.2M+6.1%675K3.24
    13 March 20202.1M+16.0%301K6.84
    28 February 20201.8M+4.7%499K3.56
    14 February 20201.7M+6.6%215K7.88
    31 January 20201.6M+13.6%284K5.61
    15 January 20201.4M-4.8%281K4.99
    31 December 20191.5M+3.5%638K2.31
    13 December 20191.4M+80.9%394K3.61
    29 November 2019787K+44.9%715K1.10
    15 November 2019543K+0.9%772K1.00
    31 October 2019538K-11.6%243K2.22
    15 October 2019609K-8.6%184K3.31
    30 September 2019666K-9.5%266K2.51
    13 September 2019736K+0.4%207K3.55
    30 August 2019733K+14.1%191K3.84
    15 August 2019643K-48.7%417K1.54
    31 July 20191.3M-19.3%249K5.04
    15 July 20191.6M-0.3%181K8.59
    28 June 20191.6M+16.5%398K3.91
    14 June 20191.3M-0.8%255K5.24
    31 May 20191.3M+18.6%343K3.93
    15 May 20191.1M+102.4%538K2.11
    30 April 2019561K+7.8%230K2.44
    15 April 2019520K-36.3%316K1.65
    29 March 2019817K-25.1%276K2.96
    15 March 20191.1M+5.2%331K3.29
    28 February 20191.0M+5.9%627K1.65
    15 February 2019978K+22.2%250K3.91
    31 January 2019800K+14.0%259K3.09
    15 January 2019701K-11.7%199K3.53
    31 December 2018794K+9.4%357K2.22
    14 December 2018726K+22.1%240K3.02
    30 November 2018595K-2.5%317K1.87
    15 November 2018610K+48.5%689K1.00
    31 October 2018411K-12.1%275K1.49
    15 October 2018467K-19.7%192K2.44
    28 September 2018582K+39.8%192K3.04
    14 September 2018416K+6.3%184K2.26
    31 August 2018392K-11.1%291K1.35
    15 August 2018440K-15.9%392K1.12
    31 July 2018523K-6.6%186K2.81
    13 July 2018561K-10.8%167K3.36
    29 June 2018628K+36.6%370K1.70
    15 June 2018460K+21.5%213K2.16
    31 May 2018379K+7.2%224K1.69
    15 May 2018353K+18.4%261K1.35
    30 April 2018298K-9.2%317K1.00
    13 April 2018329K-57.6%308K1.07
    29 March 2018775K-73.6%1.1M1.00
    15 March 20182.9M+38.4%909K3.22
    28 February 20182.1M+1.7%281K7.54
    15 February 20182.1M-4.9%313K6.66
    31 January 20182.2M+39.6%355K6.17
    12 January 20181.6M+21.6%219K7.17
    29 December 20171.3M271K4.75
    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.