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HowShorted

ARB short interest NYSE Arca

AltShares Merger Arbitrage ETF. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: exchange-traded product: its share count floats with creation and redemption.

Shares short
6,649
vs previous settlement
+208 (+3.2%)
days to cover
1.17
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for ARB: 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
892
14 Sep 2026
Highest in window
260,252
31 Mar 2026
Days with a balance
156
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for AltShares Merger Arbitrage ETF 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 260K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20266,649+2081.17
31 Aug 20266,441โˆ’3541.00
14 Aug 20266,795โˆ’16,4711.00
31 Jul 202623,266+10,3921.90
15 Jul 202612,874+8,3131.00
30 Jun 20264,561โˆ’11,0271.00
15 Jun 202615,588+8541.15
29 May 202614,734โˆ’2752.21
15 May 202615,009โˆ’36,5501.00
30 Apr 202651,559+44,5683.49
15 Apr 20266,991โˆ’3991.00
31 Mar 20267,390โˆ’70,6161.00
13 Mar 202678,006+32,1245.26
27 Feb 202645,882+6,8434.58
13 Feb 202639,039+27,5653.12
30 Jan 202611,474+2,9121.09
15 Jan 20268,562โˆ’57,4631.00
31 Dec 202566,025+12,3244.57
15 Dec 202553,701โˆ’3,4566.58
28 Nov 202557,157โˆ’5,3797.36
14 Nov 202562,536โˆ’159,60110.31
31 Oct 2025222,137+203,0387.18
15 Oct 202519,099+8681.40
30 Sep 202518,231โˆ’4932.72
15 Sep 202518,724โˆ’1,1772.49
29 Aug 202519,901+11,5992.30
15 Aug 20258,302โˆ’4321.25
31 Jul 20258,734+3,8131.00
15 Jul 20254,921+1731.00
30 Jun 20254,748โˆ’6,9661.00
13 Jun 202511,714+5,6781.80
30 May 20256,036+1,2911.00
15 May 20254,745+3,7271.00
30 Apr 20251,018โˆ’7301.00
15 Apr 20251,748โˆ’11,2451.00
31 Mar 202512,993โˆ’25,9281.67
14 Mar 202538,921+16,4673.23
28 Feb 202522,454+5,3072.15
14 Feb 202517,147+8202.81
31 Jan 202516,327+9,5241.94
15 Jan 20256,803+4,0331.00
31 Dec 20242,770โˆ’1,1631.00
13 Dec 20243,933โˆ’36,5951.00
29 Nov 202440,528+32,2994.02
15 Nov 20248,229โˆ’6,1421.00
31 Oct 202414,371+11,7802.25
15 Oct 20242,591โˆ’2,6371.00
30 Sep 20245,228+4171.04
13 Sep 20244,811โˆ’19,6921.00
30 Aug 202424,503+16,8662.71
15 Aug 20247,637โˆ’1,7591.00
31 Jul 20249,396+8,6321.03
15 Jul 2024764+11.00
28 Jun 2024763โˆ’7,4871.00
14 Jun 20248,250โˆ’23,5311.49
31 May 202431,781+29,9132.13
15 May 20241,868โˆ’9951.00
30 Apr 20242,863โˆ’12,4401.00
15 Apr 202415,303+7,5191.00
28 Mar 20247,784โˆ’97,0001.08
15 Mar 2024104,784+81,6736.29
29 Feb 202423,111+8,2821.00
15 Feb 202414,829+14,4371.00
31 Jan 2024392โˆ’1,2561.00
12 Jan 20241,648โˆ’6081.00
29 Dec 20232,256โˆ’4,2391.00
15 Dec 20236,495+6,3491.00
30 Nov 2023146โˆ’3,2971.00
15 Nov 20233,443สณโˆ’62,7821.00
31 Oct 202366,225+7,19726.88
13 Oct 202359,028+57,6053.69
29 Sep 20231,423+9771.00
15 Sep 2023446โˆ’14,1331.00
31 Aug 202314,579+7,4603.40
15 Aug 20237,119โˆ’8,0532.01
31 Jul 202315,172+13,9552.59
14 Jul 20231,217โˆ’34,7031.00
30 Jun 202335,920+30,6401.95
15 Jun 20235,280+4,4761.00
31 May 2023804โˆ’3281.00
15 May 20231,132โˆ’25,9351.00
28 Apr 202327,067โˆ’43,5615.22
14 Apr 202370,628โˆ’163,5972.67
31 Mar 2023234,225+162,36024.08
15 Mar 202371,865+37,0101.24
28 Feb 202334,855+31,7101.00
15 Feb 20233,145+2961.00
31 Jan 20232,849โˆ’65,4281.00
13 Jan 202368,277+68,2761.11
30 Dec 20221โˆ’1821.00
15 Dec 2022183โˆ’4611.00
30 Nov 2022644+5441.00
15 Nov 2022100โˆ’2831.00
31 Oct 2022383+1821.00
14 Oct 2022201+1511.00
30 Sep 202250โˆ’601.00
15 Sep 2022110โˆ’1771.00
31 Aug 2022287โˆ’2,8721.00
15 Aug 20223,159+2,1751.00
15 Jul 2022984+4241.00
30 Jun 2022560โˆ’2,7861.00
15 Jun 20223,346โˆ’1,8801.00
31 May 20225,226+4121.01
13 May 20224,814+3481.00
29 Apr 20224,466+8761.00
14 Apr 20223,590โˆ’7,1921.00
31 Mar 202210,782โˆ’3,8441.49
15 Mar 202214,626โˆ’1862.10
28 Feb 202214,812+6,9812.59
15 Feb 20227,831+7,7891.00
31 Jan 202242โˆ’3521.00
14 Jan 2022394โˆ’7681.00
31 Dec 20211,162โˆ’23,5941.00
15 Dec 202124,756+23,1446.25
30 Nov 20211,612โˆ’17,9222.10
15 Nov 202119,534+18,3795.60
29 Oct 20211,155+2941.18
15 Oct 2021861+4211.00
15 Sep 2021440+2401.00
31 Aug 2021200โˆ’1371.00
13 Aug 2021337+3341.00
30 Jul 20213โˆ’541.00
15 Jul 202157โˆ’5781.00
30 Jun 2021635+4511.00
15 Jun 2021184+901.00
28 May 202194โˆ’511.00
14 May 2021145+1271.00
30 Apr 202118โˆ’3201.00
15 Apr 2021338+1841.00
31 Mar 2021154โˆ’1631.00
15 Mar 2021317+1871.00
26 Feb 2021130โˆ’2631.00
12 Feb 2021393โˆ’1,3961.00
29 Jan 20211,789+2661.00
15 Jan 20211,523+4061.02
31 Dec 20201,117+8071.00
15 Dec 2020310+481.00
30 Nov 2020262โˆ’2061.00
13 Nov 2020468+1271.00
30 Oct 2020341+311.00
15 Oct 2020310+2041.00
30 Sep 2020106โˆ’2511.00
15 Sep 2020357โˆ’9211.00
31 Aug 20201,278+2821.16
14 Aug 2020996+5501.00
31 Jul 2020446+2061.00
15 Jul 2020240โˆ’33,5201.00
15 Jun 202033,760+7,60720.78
29 May 202026,153+15,91812.75
15 May 202010,235โ€“1.00

Scroll inside the table for earlier settlements, back to 15 May 2020.

Questions

Frequently asked questions

What is ARB's short interest?
6,649 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 208 from the previous settlement.
Why is there no percentage for ARB?
Because no defensible share count exists to divide by: exchange-traded product: its share count floats with creation and redemption. An exchange-traded product's share count changes every day as units are created and redeemed, so no filing gives a stable count to divide by. FINRA's shares-short figure is exact; a percentage of it would not be.
What is ARB's days to cover?
1.17 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 funds by shares short and days to cover: most shorted ETFs. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.