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HowShorted

CDIO short interest Nasdaq Capital Market

Cardio Diagnostics Holdings In. 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
5,259
vs previous settlement
−18,367 (-77.7%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for CDIO 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 CDIO days to cover

Fails to deliver

The SEC's fails-to-deliver figure for CDIO: 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
3,244
31 Aug 2026
Highest in window
492,837
23 Feb 2026
Days with a balance
98
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Cardio Diagnostics Holdings In 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 493K shares.

History

Every FINRA settlement we hold for CDIO, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20265,259−18,3671.00
31 Aug 202623,626−5,9401.00
14 Aug 202629,566+5,7731.00
31 Jul 202623,793+19,2451.00
15 Jul 20264,548−15,6961.00
30 Jun 202620,244+5,3641.00
15 Jun 202614,880−4,3871.00
29 May 202619,267+2671.00
15 May 202619,000−27,8151.00
30 Apr 202646,815−6,9461.20
15 Apr 202653,761+31,4971.00
31 Mar 202622,264−138,2801.00
13 Mar 2026160,544−350,2681.00
27 Feb 2026510,812+388,2961.00
13 Feb 2026122,516−21,9741.13
30 Jan 2026144,490+10,9001.00
15 Jan 2026133,590+128,2051.00
31 Dec 20255,385+3,1941.00
15 Dec 20252,191−24,2481.00
28 Nov 202526,439+22,0831.00
14 Nov 20254,356−8041.00
31 Oct 20255,160−34,4061.00
15 Oct 202539,566+12,9691.00
30 Sep 202526,597−24,6651.00
15 Sep 202551,262+34,0082.33
29 Aug 202517,254−2,4761.00
15 Aug 202519,730−7641.00
31 Jul 202520,494+6,9691.00
15 Jul 202513,525−31,8281.00
30 Jun 202545,353−12,3221.08
13 Jun 202557,675−28,2121.00
30 May 202585,887+29,7791.06
15 May 202556,108−1,248,9171.00
30 Apr 20251,305,025−540,8141.53
15 Apr 20251,845,839+297,5602.53
31 Mar 20251,548,279+297,6901.88
14 Mar 20251,250,589−730,5211.44
28 Feb 20251,981,110−540,2881.19
14 Feb 20252,521,398+758,2341.00
31 Jan 20251,763,164+1,436,9831.00
15 Jan 2025326,181−1,204,5561.00
31 Dec 20241,530,737−1,946,5261.00
13 Dec 20243,477,263+1,922,4351.00
29 Nov 20241,554,828+1,125,8031.00
15 Nov 2024429,025−1,251,1921.00
31 Oct 20241,680,217+656,1561.00
15 Oct 20241,024,061−1,771,9181.00
30 Sep 20242,795,979+2,562,6361.00
13 Sep 2024233,343−166,8221.00
30 Aug 2024400,165+89,6963.34
15 Aug 2024310,469+38,3991.00
31 Jul 2024272,070−23,2981.45
15 Jul 2024295,368−153,5541.79
28 Jun 2024448,922+14,5371.67
14 Jun 2024434,385−94,9092.81
31 May 2024529,294−768,3612.53
15 May 20241,297,655+961,1731.00
30 Apr 2024336,482−173,9281.00
15 Apr 2024510,410+65,7761.41
28 Mar 2024444,634−11,6201.62
15 Mar 2024456,254−38,0201.00
29 Feb 2024494,274−238,9061.40
15 Feb 2024733,180−24,3131.00
31 Jan 2024757,493−89,5451.00
12 Jan 2024847,038+372,8931.00
29 Dec 2023474,145−293,8831.00
15 Dec 2023768,028−306,7401.00
30 Nov 20231,074,768−1,484,3491.00
15 Nov 20232,559,117+2,266,4911.00
31 Oct 2023292,626+29,6241.00
13 Oct 2023263,002+194,2071.00
29 Sep 202368,795+23,8531.00
15 Sep 202344,942+37,8481.00
31 Aug 20237,094−6,8641.00
15 Aug 202313,958−55,2401.00
31 Jul 202369,198−45,5091.00
14 Jul 2023114,707−9,2871.41
30 Jun 2023123,994−3,9491.00
15 Jun 2023127,943−100,6901.02
31 May 2023228,633+114,0411.00
15 May 2023114,592−55,3271.00
28 Apr 2023169,919+33,9762.05
14 Apr 2023135,943+35,6471.00
31 Mar 2023100,296+18,5231.00
15 Mar 202381,773+60,3951.00
28 Feb 202321,378+4,0191.00
15 Feb 202317,359−23,2621.00
31 Jan 202340,621−3,8321.83
13 Jan 202344,453+17,7361.00
30 Dec 202226,717−11,8871.00
15 Dec 202238,604−47,8701.11
30 Nov 202286,474−21,4841.00
15 Nov 2022107,958+102,9091.00
31 Oct 20225,049–1.00

Scroll inside the table for earlier settlements, back to 31 Oct 2022.

Questions

Frequently asked questions

What is CDIO's short interest?
5,259 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 18,367 from the previous settlement.
Why is there no percentage for CDIO?
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 CDIO's days to cover?
1.00 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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