Amtech Systems ASYS Institutional Ownership

NASDAQ ASYS

$13.89 +0.27 (+1.98%)

At close: Oct 21, 2026 · 4:00 PM EDT

As of the 13F quarter ended Jun 30, 2026, 111 institutions held 59.54% of Amtech Systems (ASYS) shares outstanding. Versus the prior quarter, institutional ownership was up 8.01 percentage points, the holder count rose by 32 and shares held were up 39.56%. The largest holder is AIGH Capital Management LLC with 1.25Mn shares (7.15% of outstanding).

Updated Oct 10, 2026 Amtech Systems (ASYS) stock price and overview

Institutions by Trading Activity

111 Institutions

Increased 85 76.6%

Unchanged 6 5.4%

Reduced 20 18.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

59.54%

▲+8.01 pp QoQ

Shares Held by Institutions

10.42Mn

of 17.51Mn outstanding

▲+39.56% QoQ

Shares Outstanding

17.51Mn

7.08Mn held outside 13F filers

Institutional Investors

111

filed 13F for Jun 2026

▲+32 vs prior quarter

Net Shares Added (QoQ)

+2.95Mn

accumulated since last quarter

Value of Holdings

$141.98Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 10, 2026

Amtech Systems Inc (NASDAQ:ASYS) appeared in the 13F filings of 111 institutional investors for the quarter ended June 30, 2026.

These investors held 59.54% of outstanding shares in Q2 2026, up from 51.53% the quarter before.
Total shares held in ASYS rose 39.56% from Q1 2026; the number of holders rose 226.47% from Q2 2025.
Among the 111 holders of Amtech Systems, 85 added to their positions, 20 reduced their stakes and 6 left their positions unchanged.
Altogether, institutional holders owned 10.42Mn ASYS shares at the end of Q2 2026, up 2.95Mn from the prior quarter and up 6.37Mn from a year earlier.
As of June 30, 2026, the biggest holder of Amtech Systems was AIGH Capital Management LLC with 1.25Mn shares, or 7.15% of shares outstanding.
The largest position increases in ASYS for Q2 2026 were by BlackRock, Inc. (+618.04K shares), Geode Capital Management, LLC (+152.69K shares), Renaissance Technologies LLC (+152.51K shares), Acadian Asset Management LLC (+113.44K shares) and Connor, Clark & Lunn Investment Management Ltd. (+108.23K shares).
On the other side, among holders that kept a position in Amtech Systems, the largest reductions in Q2 2026 came from Millennium Management LLC (-362.97K shares), Dimensional Fund Advisors LP (-102.66K shares), Jane Street Group, LLC (-91.41K shares), Susquehanna International Group, LLP (-91.1K shares) and Arrowstreet Capital, Limited Partnership (-56.49K shares).
Amtech Systems' 10 largest institutional shareholders as of Q2 2026 were AIGH Capital Management LLC (1.25Mn shares), First Eagle Investment Management, LLC (848.43K shares), BlackRock, Inc. (763.49K shares), AWM Investment Company, Inc. (690K shares), Vanguard Capital Management LLC (580.5K shares), Acadian Asset Management LLC (580.28K shares), Dimensional Fund Advisors LP (426.69K shares), Marshall Wace, LLP (398.56K shares), Arrowstreet Capital, Limited Partnership (308.9K shares) and Geode Capital Management, LLC (284.84K shares), per Business Quant data.

Form 13F Holdings

112 Institutional Holders

Report period 30 Jun, 2026

Total shares held 10.42Mn

Of outstanding 59.54%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	AIGH Capital Management LLC	0001835943	1,252,000	7.15%	▲1,252,000	0.00%	$28.90Mn
2	First Eagle Investment Management, LLC	0001325447	848,426	4.85%	▲15,973	+1.92%	$19.58Mn
3	BlackRock, Inc.	0002012383	763,487	4.36%	▲618,041	+424.93%	$17.62Mn
4	AWM Investment Company, Inc.	0001535264	690,000	3.94%	▲690,000	0.00%	$15.93Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	580,502	3.32%	▲16,175	+2.87%	$13.40Mn
6	ACADIAN ASSET MANAGEMENT LLC	0000916542	580,278	3.31%	▲113,441	+24.30%	$13.39K
7	DIMENSIONAL FUND ADVISORS LP	0000354204	426,694	2.44%	▼102,657	-19.39%	$9.84Mn
8	MARSHALL WACE, LLP	0001318757	398,564	2.28%	▼18,512	-4.44%	$9.20Mn
9	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	308,896	1.76%	▼56,491	-15.46%	$7.13Mn
10	GEODE CAPITAL MANAGEMENT, LLC	0001214717	284,836	1.63%	▲152,687	+115.54%	$6.58Mn
11	Connor, Clark & Lunn Investment Management Ltd.	0001596800	282,388	1.61%	▲108,229	+62.14%	$6.52Mn
12	RENAISSANCE TECHNOLOGIES LLC	0001037389	260,605	1.49%	▲152,509	+141.09%	$6.01Mn
13	TWO SIGMA INVESTMENTS, LP	0001179392	254,367	1.45%	▼12,489	-4.68%	$5.87Mn
14	JANE STREET GROUP, LLC	0001595888	249,465	1.42%	▼91,414	-26.82%	$5.76Mn
15	Regal Partners Ltd	0001577774	237,503	1.36%	▲237,503	0.00%	$5.48Mn
16	Qube Research & Technologies Ltd	0001729829	194,714	1.11%	▲106,197	+119.97%	$4.49Mn
17	State Street Corp	0000093751	155,849	0.89%	▲98,509	+171.80%	$3.60Mn
18	Trexquant Investment LP	0001633445	119,750	0.68%	▼54,139	-31.13%	$2.76Mn
19	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0001107261	111,472	0.64%	▲2,354	+2.16%	$2.57Mn
20	CITADEL ADVISORS LLC	0001423053	106,246	0.61%	▼668	-0.62%	$2.45Mn

Showing 1 to 20 of 112 holders