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HowShorted

SMWB short interest NYSE

Similarweb Ltd.. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: an SEC filer exists but no defensible share count is available yet.

Shares short
759,597
vs previous settlement
+118,831 (+18.5%)
days to cover
1.24
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for SMWB shares short

Days to cover

FINRA's own figure: reported shares short divided by the security's average daily trading volume, published alongside each settlement.

Aggregate net short position time series for SMWB days to cover

Fails to deliver

The SEC's fails-to-deliver figure for SMWB: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
60,638
9 Sep 2026
Highest in window
2,073,625
23 Feb 2026
Days with a balance
51
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Similarweb Ltd. fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 2.1M shares.

History

Every FINRA settlement we hold for SMWB, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026759,597+118,8311.24
31 Aug 2026640,766+238,3771.00
14 Aug 2026402,389−195,3111.00
31 Jul 2026597,700−156,6961.00
15 Jul 2026754,396+75,1431.00
30 Jun 2026679,253+178,2841.00
15 Jun 2026500,969+56,2681.00
29 May 2026444,701−269,6871.00
15 May 2026714,388+455,4071.00
30 Apr 2026258,981−314,4311.00
15 Apr 2026573,412−167,4801.45
31 Mar 2026740,892−12,5331.82
13 Mar 2026753,425−254,1581.39
27 Feb 20261,007,583+529,1621.00
13 Feb 2026478,421−137,1981.00
30 Jan 2026615,619+115,7081.67
15 Jan 2026499,911+32,6381.64
31 Dec 2025467,273−102,4351.46
15 Dec 2025569,708−235,2511.69
28 Nov 2025804,959+350,8611.86
14 Nov 2025454,098+84,9331.25
31 Oct 2025369,165−54,5121.76
15 Oct 2025423,677−164,8561.57
30 Sep 2025588,533−256,3301.86
15 Sep 2025844,863−86,6801.69
29 Aug 2025931,543+299,7451.53
15 Aug 2025631,798−38,2631.03
31 Jul 2025670,061−28,1121.68
15 Jul 2025698,173+407,8531.22
30 Jun 2025290,320−55,2591.00
13 Jun 2025345,579+89,7841.00
30 May 2025255,795−79,7421.00
15 May 2025335,537+86,3301.00
30 Apr 2025249,207−331,0511.00
15 Apr 2025580,258+32,5721.43
31 Mar 2025547,686−72,8371.78
14 Mar 2025620,523−163,5901.20
28 Feb 2025784,113−63,6111.00
14 Feb 2025847,724+142,3581.00
31 Jan 2025705,366+18,9171.04
15 Jan 2025686,449+59,9231.11
31 Dec 2024626,526+353,8661.16
13 Dec 2024272,660−34,0161.00
29 Nov 2024306,676+154,4041.00
15 Nov 2024152,272−116,8661.00
31 Oct 2024269,138+2,3941.99
15 Oct 2024266,744+9,4861.72
30 Sep 2024257,258+114,1141.00
13 Sep 2024143,144+62,0271.00
30 Aug 202481,117−19,5191.00
15 Aug 2024100,636+39,4701.00
31 Jul 202461,166−4,7881.00
15 Jul 202465,954−9,4501.00
28 Jun 202475,404−17,6061.00
14 Jun 202493,010−1,5251.00
31 May 202494,535−32,4251.00
15 May 2024126,960−17,3141.00
30 Apr 2024144,274−57,7991.04
15 Apr 2024202,073+25,9061.95
28 Mar 2024176,167+9,5971.39
15 Mar 2024166,570+67,2251.00
29 Feb 202499,345−126,2731.00
15 Feb 2024225,618+29,3011.00
31 Jan 2024196,317−5,2291.52
12 Jan 2024201,546+20,6552.41
29 Dec 2023180,891−43,9962.16
15 Dec 2023224,887−28,0541.55
30 Nov 2023252,941−64,9652.88
15 Nov 2023317,906−326,2441.75
31 Oct 2023644,150−32,99213.75
13 Oct 2023677,142−145,6916.96
29 Sep 2023822,833+2,91220.49
15 Sep 2023819,921+42,19015.19
31 Aug 2023777,731+74,9915.19
15 Aug 2023702,740+7,9265.87
31 Jul 2023694,814+8,9036.46
14 Jul 2023685,911−23,6854.46
30 Jun 2023709,596+107,65810.18
15 Jun 2023601,938+72,9735.34
31 May 2023528,965+107,6654.59
15 May 2023421,300+8,8654.81
28 Apr 2023412,435+73,7846.78
14 Apr 2023338,651−17,6216.42
31 Mar 2023356,272+70,5754.07
15 Mar 2023285,697−117,2833.44
28 Feb 2023402,980−1041.50
15 Feb 2023403,084−31,9711.51
31 Jan 2023435,055−78,3113.81
13 Jan 2023513,366−186,8944.22
30 Dec 2022700,260+9,3773.33
15 Dec 2022690,883+50,7684.78
30 Nov 2022640,115+86,2582.19
15 Nov 2022553,857+60,2724.03
31 Oct 2022493,585−87,1146.96
14 Oct 2022580,699−22,9228.45
30 Sep 2022603,621−12,2418.17
15 Sep 2022615,862+27,27912.14
31 Aug 2022588,583−5,2445.14
15 Aug 2022593,827−56,5004.31
29 Jul 2022650,327+11,5627.43
15 Jul 2022638,765+55,7136.23
30 Jun 2022583,052−20,5534.98
15 Jun 2022603,605+47,3256.42
31 May 2022556,280−15,0832.89
13 May 2022571,363−95,1073.34
29 Apr 2022666,470−16,3969.60
14 Apr 2022682,866−73,9368.32
31 Mar 2022756,802−6,8517.20
15 Mar 2022763,653−13,7018.41
28 Feb 2022777,354+189,1925.47
15 Feb 2022588,162+35,8646.60
31 Jan 2022552,298+21,4062.47
14 Jan 2022530,892−258,4344.34
31 Dec 2021789,326+69,8873.85
15 Dec 2021719,439+278,0012.02
30 Nov 2021441,438+124,6381.18
15 Nov 2021316,800−32,3781.23
29 Oct 2021349,178−11,3496.18
15 Oct 2021360,527−26,6555.81
30 Sep 2021387,182+145,0682.86
15 Sep 2021242,114+68,1643.30
31 Aug 2021173,950+4,3911.58
13 Aug 2021169,559+87,0111.00
30 Jul 202182,548−5,7881.00
15 Jul 202188,336−358,5511.00
30 Jun 2021446,887+166,9911.94
15 Jun 2021279,896−32,7211.50
28 May 2021312,617+36,3151.75
14 May 2021276,302–1.00

Scroll inside the table for earlier settlements, back to 14 May 2021.

Questions

Frequently asked questions

What is SMWB's short interest?
759,597 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 118,831 from the previous settlement.
Why is there no percentage for SMWB?
Because no defensible share count exists to divide by: an SEC filer exists but no defensible share count is available yet. The symbol maps to an SEC filer, but its share count cannot be used yet. A newly listed company needs two cover-page counts on file before the first is trusted; a split or an unexplained jump pauses publication until a fresh SEC count corroborates it; a secondary share class publishes under the company's primary line; and a foreign filer's short count is in depositary-share units. This page upgrades to a percentage automatically once a defensible count exists.
What is SMWB's days to cover?
1.24 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume, published in the same file and shown verbatim. We hold no volume data ourselves.
Is this the short float?
No. This page shows FINRA's share count only. Short float divides that count by the public float, and short interest as we publish it elsewhere divides it by shares outstanding from SEC filings. Neither denominator is available for this line, so neither ratio is shown.
How often does this update?
FINRA member firms report short positions as of the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. We ingest each file the day it appears and re-read recent settlements for revisions.

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