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EOD US-equity data for investors and AI agents

Data is end-of-day, not real-time, and not investment advice

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ACMR short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float5.9%61,513,000 float shares
Days to Cover3.41,075,713 average daily volume
Open Short Position3,603,818ACM Research, Inc. Class A Com
Change vs Previous-307,389-7.9%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 20263,603,818-307,389-7.9%3.45.9%
Jul 15, 20263,911,207+665,115+20.5%2.96.4%
Jun 30, 20263,246,092+887,027+37.6%1.55.3%

Short interest is an open-position snapshot published twice monthly. It is not daily short-sale volume.

Daily off-exchange short volume

FINRA-reported short-sale transaction flow for the last 30 calendar days.

Trade DateShort VolumeShort ExemptFINRA TotalShort Volume %Facilities
Aug 21, 2026114,5580193,28859.3%3
Aug 20, 2026215,53910,107332,07864.9%3
Aug 19, 2026234,8931,532371,42763.2%3
Aug 18, 20261,033,8415,7901,331,74277.6%3
Aug 17, 2026282,523113406,45069.5%3
Aug 14, 2026115,184149190,75660.4%3
Aug 13, 2026107,466826170,19763.1%3
Aug 12, 2026119,2113,055206,85857.6%3
Aug 11, 2026169,3763267,87963.2%3
Aug 10, 2026327,84393550,87859.5%3
Aug 7, 2026337,9600564,61959.9%3
Aug 6, 2026179,7250380,53147.2%3
Aug 5, 2026123,9680277,24744.7%3
Aug 4, 2026140,501250264,46953.1%3
Aug 3, 2026177,868990337,47752.7%3
Jul 31, 2026149,15240289,41751.5%3
Jul 30, 2026362,24713,166590,70561.3%3
Jul 29, 2026398,42920,397856,52146.5%3
Jul 28, 2026217,2065,586448,55648.4%3
Jul 27, 2026146,7034,088430,55834.1%3
Jul 24, 2026116,71995199,45758.5%3

Daily short volume is transaction flow reported through FINRA facilities. It does not measure open short positions and is not consolidated exchange-wide volume.