ACMR ACM Research, Inc.

NASDAQ
$72.00

ACM Research, Inc. (ACMR) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+33.33
18 buyers / 9 sellers
STRONG BUYING
Funds compared
27
funds with comparable ACMR positions
22 current holders · 15 prior-quarter holders
Net share change
+385.3K
+1.08M added, -693.4K cut
Position activity
12 new 6 increased 4 reduced 5 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
D. E. Shaw & Co., Inc. Quant New +33.5K — $4.3M 0.0% 60
Balyasny Asset Management L.P. Sold Out -47.1K -100.0% $6.0M 0.0% 59
CITADEL ADVISORS LLC Quant Increased +433.5K +213.1% $55.0M 0.1% 58
Maverick Capital Long/Short Growth New +5.3K — $674.4K 0.0% 57
Magnetar Capital Event Quant Sold Out -18.3K -100.0% $2.3M 0.0% 57
Capital Fund Management Quant Macro New +20.4K — $2.6M 0.0% 55
Quadrature Capital Quant New +48.9K — $6.2M 0.1% 55
TWO SIGMA INVESTMENTS, LP Quant Increased +160.1K +305.5% $20.3M 0.0% 55
Gotham Asset Management, LLC Quant Value New +3.0K — $382.8K 0.0% 54
Portolan Capital Management Long/Short Increased +94.2K +113.1% $11.9M 0.8% 54

Most significant buyers

By move score, not size.

  • D. E. Shaw & Co., Inc. New · +33.5K
  • CITADEL ADVISORS LLC Increased · +433.5K
  • Maverick Capital New · +5.3K
  • Capital Fund Management New · +20.4K
  • Quadrature Capital New · +48.9K

Most significant sellers

By move score, not size.

  • Balyasny Asset Management L.P. Sold Out · -47.1K
  • Magnetar Capital Sold Out · -18.3K
  • Brevan Howard Capital Management Sold Out · -19.5K
  • Boothbay Fund Management Sold Out · -38.2K
  • Y-Intercept Sold Out · -76.2K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
D. E. Shaw & Co., Inc. 1 33.5K 0 +33.5K — 0.0% New 60
Balyasny Asset Management L.P. 2 0 47.1K -47.1K -100.0% 0.0% Sold Out 59
CITADEL ADVISORS LLC 1 636.8K 203.4K +433.5K +213.1% 0.1% Increased 58
Maverick Capital 2 5.3K 0 +5.3K — 0.0% New 57
Magnetar Capital 2 0 18.3K -18.3K -100.0% 0.0% Sold Out 57
Capital Fund Management 3 20.4K 0 +20.4K — 0.0% New 55
Quadrature Capital 3 48.9K 0 +48.9K — 0.1% New 55
TWO SIGMA INVESTMENTS, LP 2 212.5K 52.4K +160.1K +305.5% 0.0% Increased 55
Gotham Asset Management, LLC 2 3.0K 0 +3.0K — 0.0% New 54
Portolan Capital Management 3 177.4K 83.3K +94.2K +113.1% 0.8% Increased 54
Jain Global 3 12.1K 0 +12.1K — 0.0% New 54
RENAISSANCE TECHNOLOGIES LLC 1 229.8K 122.6K +107.2K +87.4% 0.0% Increased 53
MILLENNIUM MANAGEMENT LLC 2 140.5K 65.6K +74.9K +114.3% 0.0% Increased 53
Voleon Capital Management 3 17.6K 0 +17.6K — 0.0% New 53
LMR Partners 3 3.4K 0 +3.4K — 0.0% New 53
CenterBook Partners 4 41.4K 0 +41.4K — 0.3% New 52
Brevan Howard Capital Management 3 0 19.5K -19.5K -100.0% 0.0% Sold Out 51
Boothbay Fund Management 4 0 38.2K -38.2K -100.0% 0.0% Sold Out 51
Y-Intercept 4 0 76.2K -76.2K -100.0% 0.0% Sold Out 50
Aquatic Capital Management 4 16.8K 0 +16.8K — 0.1% New 50
Graham Capital Management 3 4.5K 0 +4.5K — 0.0% New 49
Qube Research & Technologies Ltd 2 280.0K 724.4K -444.4K -61.3% 0.0% Reduced 46
Quantbot Technologies 4 523 0 +523 — 0.0% New 45
Walleye Capital 3 2.2K 871 +1.3K +148.8% 0.0% Increased 45
Engineers Gate 4 2.5K 42.9K -40.4K -94.2% 0.0% Reduced 42
MARSHALL WACE, LLP 2 5.6K 5.7K -90 -1.6% 0.0% Reduced 26
AQR Capital Management 3 314.2K 323.4K -9.2K -2.9% 0.0% Reduced 22

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.