Amtech Systems Inc (ASYS) Institutional Ownership

Institutions by Trading Activity

14,679,000Shares Outstanding

6,278,917Shares held by institutions

$119,613,369Value of institutional holdings

42.77%Institutional ownership %

43.59%Shares Changed QoQ

66No. of institutional investors

Amtech Systems Inc (NASDAQ:ASYS) is held by 66 institutional investors per 13F filings through December 2025.

These investors collectively held 42.2% of Amtech Systems's outstanding shares in December 2025, up from 31.7% in September 2025.
They increased total shares held in ASYS by 41.79% quarter over quarter, and investors in Amtech Systems increased 83.33% from a year ago.
Among the 66 funds, 48 bought more Amtech Systems shares, 13 sold down, and 5 held their ground.
Institutional investors collectively held 6.2Mn shares in Amtech Systems as of December 2025, up by 1.83Mn shares quarter on quarter, and up 650.81K shares year over year.
RITHOLTZ WEALTH MANAGEMENT leads ownership in ASYS with 40.12K shares as of December 31, 2025, equal to 0.27% of outstanding shares.
Leading buyers of Amtech Systems shares for the quarter ending December 2025 were Sowell Financial Services LLC (4.05K), IFP Advisors, Inc (1.02K), RITHOLTZ WEALTH MANAGEMENT (549).
Per Business Quant data, the top 6 holders of Amtech Systems for the quarter ending December 2025 are RITHOLTZ WEALTH MANAGEMENT (40.12K), Merit Financial Group, LLC (37.0K), Janney Montgomery Scott LLC (30.76K), Sowell Financial Services LLC (20.21K), JAMES INVESTMENT RESEARCH, INC. (14.6K), IFP Advisors, Inc (1.02K).

6,278,917 Total Shares Held

Rows:

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
Goldman Sachs Group Inc	31 Dec, 2025	157,386	126,135	403.62%	$1,975,194.00
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
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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