ACMR ACM Research, Inc.

NASDAQ
$71.37

ACM Research, Inc. (ACMR) Institutional Ownership

What the institutions did with ACMR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.

Managers compared
3
filed both this quarter and last
Managers holding
3
+1 on the quarter
Buyers
1
1 opened new
Sellers
2
0 sold out entirely
Buyer share
33.3%
of managers who traded it
Breadth
-33.3
net buyers, as a share of those trading

Only 3 managers reported a position this quarter, so the percentages above describe a very small sample.

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Largest holders

Manager Shares % of reported
Violich Capital Management, Inc. 4.4K 97.9%
MassMutual Private Wealth & Trust, FSB 57 1.3%
Versant Capital Management, Inc 38 0.9%

Largest changes

Manager Action Previous Current Change
Violich Capital Management, Inc. Reduced 5.4K 4.4K -1.0K
Versant Capital Management, Inc New 0 38 +38
MassMutual Private Wealth & Trust, FSB Reduced 91 57 -34

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.