Amtech Systems Inc (ASYS) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

10,800,000Shares Outstanding

72,906Shares held by institutions

$839,877Value of institutional holdings

57.07%Institutional ownership %

41.48%Shares Changed QoQ

65No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, Amtech Systems Inc (NASDAQ:ASYS) is held by 65 institutional firms.

Institutional ownership in Amtech Systems edged up to 57.1% in December 2025, compared to 34.0% in September 2025.
Quarterly data indicates a 41.48% shift in institutional share volume, and the annual owner count reflects an increase of 80.56%.
A review of institutional activity for Amtech Systems shows 47 of 65 filers increasing their positions, while 14 reduced their stake, and 4 remained unchanged.
The total number of shares held by institutions in Amtech Systems increased to 6.16Mn as of December 2025, a net change of up by 1.81Mn shares quarter on quarter, and up 615.61K shares year over year.
First Eagle Investment Management, LLC continues to be the largest institutional holder of Amtech Systems as of December 31, 2025, with a position of 734.35K shares, representing 6.80% of the company's outstanding stock.
Among the most significant buyers of Amtech Systems during December 2025 were MARSHALL WACE, LLP (247.35K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (164.60K), ACADIAN ASSET MANAGEMENT LLC (152.48K), JANE STREET GROUP, LLC (150.33K), RENAISSANCE TECHNOLOGIES LLC (126.30K).
Leading sellers of Amtech Systems stock in December 2025 included DIMENSIONAL FUND ADVISORS LP (177.71K), VANGUARD GROUP INC (44.10K), WealthTrust Axiom LLC (24.50K), Ancora Advisors LLC (19.00K), Pacific Ridge Capital Partners, LLC (18.68K).
The top 10 institutional holders of Amtech Systems for the quarter ending December 2025 included First Eagle Investment Management, LLC (734.35K), DIMENSIONAL FUND ADVISORS LP (672.11K), VANGUARD GROUP INC (631.90K), Pacific Ridge Capital Partners, LLC (627.81K), MARSHALL WACE, LLP (352.62K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (347.03K), JANE STREET GROUP, LLC (325.75K), ACADIAN ASSET MANAGEMENT LLC (236.01K), RENAISSANCE TECHNOLOGIES LLC (146.60K), BlackRock, Inc. (134.48K).

65 Institutional Holders

72,906 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
First Eagle Investment Management, LLC	31 Dec, 2025	734,346	-18,000	-2.39%	$9,216,042.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	672,107	-177,708	-20.91%	$8,435,131.00
VANGUARD GROUP INC	31 Dec, 2025	631,905	-44,101	-6.52%	$7,930,408.00
Pacific Ridge Capital Partners, LLC	31 Dec, 2025	627,811	-18,678	-2.89%	$7,879,028.00
MARSHALL WACE, LLP	31 Dec, 2025	352,624	247,352	234.96%	$4,425,432.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	347,033	164,604	90.23%	$4,355,264.00
JANE STREET GROUP, LLC	31 Dec, 2025	325,754	150,332	85.70%	$4,088,212.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	236,008	152,476	182.54%	$2,958.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	146,596	126,296	622.15%	$1,839,780.00
BlackRock, Inc.	31 Dec, 2025	134,477	1,604	1.21%	$1,687,686.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	133,001	1,720	1.31%	$1,669,844.00
CITADEL ADVISORS LLC	31 Dec, 2025	124,843	46,389	59.13%	$1,566,779.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	111,437	111,437	0.00%	$1,398,534.00
BRIDGEWAY CAPITAL MANAGEMENT, LLC	31 Dec, 2025	96,318	31,518	48.64%	$1,208,791.00
Trexquant Investment LP	31 Dec, 2025	89,365	89,365	0.00%	$1,121,531.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	80,630	60,693	304.42%	$1,011,907.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	78,693	47,442	151.81%	$987,597.00
Informed Momentum Co LLC	31 Dec, 2025	74,305	74,305	0.00%	$932,528.00
TWO SIGMA ADVISERS, LP	31 Dec, 2025	69,997	69,997	0.00%	$878,462.00
XTX Topco Ltd	31 Dec, 2025	69,381	69,381	0.00%	$870,732.00

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