Yorktown Management & Research Co Inc

Position in ACMR — ACM Research, Inc.

CIK 1313559 Forest, VA

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Position in ACMR

as of Jun 30, 2026 · filed Jul 23, 2026 Compact

Position Value

$1,687,637

+$1,164,282 QoQ

Shares Held

13,300

0.0% QoQ

Ownership

0.019%

of shares outstanding

% of Portfolio

1.11%

of 13F equity value

Holder Rank

#162

of 374 holders

Holding Since

Jun 2025

5 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in ACMR Over Time

Shares Held

Position Value (USD)

Position in Semiconductor Equipment & Materials

Technology · as of Jun 30, 2026

Yorktown Management & Research Co Inc holds $7,271,118 across 4 Semiconductor Equipment & Materials names. ACMR ranks #3 (23.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	KLAC	Kla Corp	8,900	$2,685,219
2	NVMI	Nova Ltd.	3,220	$1,748,266
3	ACMR	ACM Research, Inc. This page	13,300	$1,687,637
4	CAMT	Camtek Ltd	7,050	$1,149,996

All Filings in ACMR

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5 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,687,637	13,300	0.0%	Shares	Sole	2026-07-23
2026-03-31	$523,355	13,300	0.0%	Shares	Sole	2026-04-20
2025-12-31	$524,685	13,300	0.0%	Shares	Sole	2026-01-23
2025-09-30	$520,429	13,300	0.0%	Shares	Sole	2025-10-29
2025-06-30	$344,470	13,300	—	Shares	Sole	2025-08-04
No filing history on record for this holder in this stock.