13FPulse
AC

ACMR ACM RESEARCH INC-CLASS A

2026Q2 · CUSIP 00108J109 · Semi Equipment · Sector: Semiconductors

Piling in

Net holder growth ranks near the top of the market

Funds that own it
370
Institutions that reported holding it to the SEC
Net increase in holders
+72
Last quarter 298 → now 370
How unusual is that
Top 5%
Stronger buying than 97% of US stocks
What the filings say, in one paragraph

370 funds held ACMR at the end of 2026Q2, up 72 from the quarter before. That is stronger buying than 97.0% of US stocks — among the most piled-into names this quarter. On the business itself, revenue over the last 12 months was $1.0B(YoY +27.3%), the P/E is 33.4x, return on equity is 8.1%. ACMR has had 10 buying rushes in its history, and the price moved +19.1% on average over the six months after (that is the raw price move, not how much it beat the market by). It sits in the Semiconductors sector, tagged Semi Equipment.

How many funds owned it, quarter by quarter

Bars = net change in institutional holders, positive (green) or negative (red). Line = total institutional holders.

2018Q1: holders=12 2018Q2: holders=33 2018Q3: holders=31 2018Q4: holders=28 2019Q1: holders=29 2019Q2: holders=40 2019Q3: holders=49 2019Q4: holders=46 2020Q1: holders=62 2020Q2: holders=85 2020Q3: holders=88 2020Q4: holders=92 2021Q1: holders=94 2021Q2: holders=92 2021Q3: holders=94 2021Q4: holders=99 2022Q1: holders=94 2022Q2: holders=98 2022Q3: holders=117 2022Q4: holders=123 2023Q1: holders=130 2023Q2: holders=122 2023Q3: holders=153 2023Q4: holders=155 2024Q1: holders=199 2024Q2: holders=201 2024Q3: holders=184 2024Q4: holders=183 2025Q1: holders=241 2025Q2: holders=244 2025Q3: holders=260 2025Q4: holders=278 2026Q1: holders=298 2026Q2: holders=370 -72 -36 +0 +36 +72 10200389 18Q119Q120Q121Q122Q123Q124Q125Q126Q126Q2 Net change in holders (bars) Total funds holding (line)

What happened after each past buying rush 10 times in its history

Quarter of the rush How unusual then Price, next 3 months Price, next 6 months
2026Q2 Top 5%
2026Q1 Top 20%
2025Q1 Top 5% +7.4% +34.8%
2024Q1 Top 5% -14.7% -23.0%
2023Q3 Top 5% +2.3% +30.2%
2022Q3 Top 10% +44.8% +12.0%
2020Q2 Top 20% -20.9% +28.0%
2020Q1 Top 5% +67.6% +32.7%
2019Q2 Top 20%
2018Q2 Top 20%

These are the raw price moves, not how much it beat the market by. Compare them against the market over the same months — in a strong bull market almost everything is up.

Show all the numbers (large funds, value held, options…) ▾
Of them, large funds
169
Change in large funds
+37
Total value they hold
$6.0B
Funds buying for the first time
120
Funds that sold out entirely
48
Price change that quarter
+10.7%
Funds holding puts (bearish)
11
Funds holding calls (bullish)
15

These are for people who want to dig. Skip them if they do not mean anything to you — the three numbers above are enough.

8,697 institutions have filed for this quarter. 13F permits late filing and a small number arrive in the weeks after the deadline, so the holder counts and changes below may tick up.

Fundamentals

PE (TTM)
33.4
EPS (TTM)
$2.10
EPS YoY
+26.5%
Revenue (TTM)
$1.0B
Revenue YoY
+27.3%
Net margin
14.5%
ROE
8.1%
Debt ratio
29.3%
FCF (TTM)
-$119M
Dividend (TTM)
No dividend
Quarterly Revenue & EPS
2021-09-30: EPS 0.15 2021-12-31: EPS 0.25 2022-03-31: EPS -0.10 2022-06-30: EPS 0.18 2022-09-30: EPS 0.32 2022-12-31: EPS 0.19 2023-03-31: EPS 0.11 2023-06-30: EPS 0.41 2023-09-30: EPS 0.39 2023-12-31: EPS 0.25 2024-03-31: EPS 0.26 2024-06-30: EPS 0.35 2024-09-30: EPS 0.45 2024-12-31: EPS 0.47 2025-03-31: EPS 0.30 2025-06-30: EPS 0.44 2025-09-30: EPS 0.52 2025-12-31: EPS 0.11 2026-03-31: EPS 0.24 2026-06-30: EPS 1.23 0M 146M 293M $M -0.11 0.62 1.35 2016201720182019202020212022202320242025202606/26 Revenue EPS

Quarterly figures, revenue up to 10 years back; EPS split-adjusted, early quarters hidden when not calibrable

P/E (TTM) over time
4Y median 16 11 31 51 20222023202420252026

P/E = close around day 47 after quarter-end ÷ TTM EPS then; this is a consistent valuation date, not the company’s actual filing date; loss quarters hidden

Quarterly free cash flow
-71M3M77M 20162017201820192020202120222023202420252026
Latest quarter $-52M (2026-03-31)

FCF = operating cash flow − capex, computed from SEC XBRL; banks/insurers have no standard cash-flow structure and are hidden

As of 2026-06-30 · SEC filings (XBRL)

Email me the next update

2026 Q3 holdings are due 2026-11-16. We will email you when the refreshed lists are live.