Skip to content
HowShorted

ARM short interest Nasdaq Global Market

Arm Holdings plc American Depo. 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
15,521,694
vs previous settlement
โˆ’1,218,921 (-7.3%)
days to cover
3.94
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for ARM: 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.

Latest balance
3,418
14 Sep 2026
Highest in window
903,095
15 Jan 2026
Days with a balance
137
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Arm Holdings plc American Depo 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 903K shares.

History

Every FINRA settlement we hold for ARM, newest first. สณ marks a figure FINRA itself flagged as revised.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202615,521,694โˆ’1,218,9213.94
31 Aug 202616,740,615โˆ’1,523,4904.39
14 Aug 202618,264,105+1,396,8524.12
31 Jul 202616,867,253โˆ’593,3202.65
15 Jul 202617,460,573+233,2722.92
30 Jun 202617,227,301+858,0651.48
15 Jun 202616,369,236โˆ’2,142,5631.27
29 May 202618,511,799โˆ’276,2601.43
15 May 202618,788,059+2,673,6191.67
30 Apr 202616,114,440+160,9511.53
15 Apr 202615,953,489+506,0932.63
31 Mar 202615,447,396สณ+735,4391.53
13 Mar 202614,711,957โˆ’113,2984.16
27 Feb 202614,825,255โˆ’2,314,3114.31
13 Feb 202617,139,566+1,795,4141.84
30 Jan 202615,344,152โˆ’2,036,0942.10
15 Jan 202617,380,246+1,846,0763.08
31 Dec 202515,534,170+1,584,0942.97
15 Dec 202513,950,076โˆ’256,7004.73
28 Nov 202514,206,776+915,3603.82
14 Nov 202513,291,416โˆ’86,0622.91
31 Oct 202513,377,478โˆ’1,000,1943.38
15 Oct 202514,377,672โˆ’1,903,8811.95
30 Sep 202516,281,553+1,259,7003.34
15 Sep 202515,021,853โˆ’221,0433.49
29 Aug 202515,242,896โˆ’166,8584.39
15 Aug 202515,409,754โˆ’831,4643.47
31 Jul 202516,241,218โˆ’66,0542.74
15 Jul 202516,307,272โˆ’2,008,3563.56
30 Jun 202518,315,628+832,7843.71
13 Jun 202517,482,844+1,464,1924.74
30 May 202516,018,652โˆ’851,9303.45
15 May 202516,870,582+1,779,3292.36
30 Apr 202515,091,253โˆ’1,471,2443.91
15 Apr 202516,562,497+3,230,3192.29
31 Mar 202513,332,178+98,8403.73
14 Mar 202513,233,338โˆ’1,597,4492.19
28 Feb 202514,830,787โˆ’1,473,9693.30
14 Feb 202516,304,756+1,570,1152.42
31 Jan 202514,734,641+2,347,4911.67
15 Jan 202512,387,150โˆ’639,3362.71
31 Dec 202413,026,486+586,7232.81
13 Dec 202412,439,763โˆ’2,420,1972.68
29 Nov 202414,859,960+948,8783.69
15 Nov 202413,911,082โˆ’563,1372.09
31 Oct 202414,474,219+64,9512.68
15 Oct 202414,409,268โˆ’119,6972.80
30 Sep 202414,528,965+969,3092.39
13 Sep 202413,559,656+142,7821.90
30 Aug 202413,416,874โˆ’3,855,5932.17
15 Aug 202417,272,467+1,763,7661.41
31 Jul 202415,508,701+1,548,1831.54
15 Jul 202413,960,518+1,066,5461.64
28 Jun 202412,893,972+1,979,8741.00
14 Jun 202410,914,098+836,7311.00
31 May 202410,077,367+1,603,8001.22
15 May 20248,473,567+781,1451.00
30 Apr 20247,692,422สณโˆ’668,2971.00
15 Apr 20248,360,719+171,1721.43
28 Mar 20248,189,547+260,7681.00
15 Mar 20247,928,779โˆ’1,081,4121.00
29 Feb 20249,010,191+1,239,8861.00
15 Feb 20247,770,305โˆ’1,496,9431.00
31 Jan 20249,267,248โˆ’1,450,8711.34
12 Jan 202410,718,119+595,7811.53
29 Dec 202310,122,338โˆ’4,964,6861.64
15 Dec 202315,087,024+1,952,0692.00
30 Nov 202313,134,955+947,1202.20
15 Nov 202312,187,835+1,041,0072.33
31 Oct 202311,146,828+1,341,0012.42
13 Oct 20239,805,827โˆ’4,027,8521.72
29 Sep 202313,833,679+13,833,2791.03
15 Sep 2023400โ€“1.00

Scroll inside the table for earlier settlements, back to 15 Sep 2023.

Questions

Frequently asked questions

What is ARM's short interest?
15,521,694 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 1,218,921 from the previous settlement.
Why is there no percentage for ARM?
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 ARM's days to cover?
3.94 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.

Ranked companies with a percentage: most shorted US stocks. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.