Amtech Systems ASYS Institutional Ownership

NASDAQ ASYS

$14.63 +0.01 (+0.07%)

At close: Aug 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

79 Institutions

Increased 51 64.6%

Unchanged 7 8.9%

Reduced 21 26.6%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

5,725.59%

▲+1,365.23 pp QoQ

Shares Held by Institutions

8.30Mn

of 145.00K outstanding

▲+51.34% QoQ

Shares Outstanding

145.00K

-8.16Mn held outside 13F filers

Institutional Investors

filed 13F for Mar 2026

▲+13 vs prior quarter

Net Shares Added (QoQ)

+2.82Mn

accumulated since last quarter

Value of Holdings

$140.14Mn

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

Quarter ending 31 Mar, 2026

Amtech Systems Inc (NASDAQ:ASYS) has 79 institutional investors that have filed 13F reports for the period ending March 2026.

Collectively, these holders controlled 5725.6% of Amtech Systems's outstanding shares in March 2026, up from 4360.4% in December 2025.
Their total shares held in ASYS increased 51.34% quarter over quarter, and separately, investors owning Amtech Systems increased 107.89% from a year ago.
Of these 79 holders, 51 added to their stakes in Amtech Systems, 21 trimmed positions, and 7 made no changes.
Combined, these investors held 8.3Mn shares in ASYS for March 2026, up by 2.82Mn shares quarter on quarter, and up 3.41Mn shares year over year.
As of March 31, 2026, First Eagle Investment Management, LLC held the largest stake in Amtech Systems with 1.66Mn shares, accounting for 1148.21% of total shares outstanding.
Leading buyers of Amtech Systems shares for the quarter ending March 2026 were First Eagle Investment Management, LLC (930.56K), VANGUARD CAPITAL MANAGEMENT LLC (564.33K), MILLENNIUM MANAGEMENT LLC (430.85K), ACADIAN ASSET MANAGEMENT LLC (230.83K), TWO SIGMA INVESTMENTS, LP (155.42K).
Leading sellers of Amtech Systems shares for the quarter ending March 2026 were Pacific Ridge Capital Partners, LLC (222.44K), DIMENSIONAL FUND ADVISORS LP (142.76K), Goldman Sachs Group Inc (120.81K), RENAISSANCE TECHNOLOGIES LLC (38.5K), Point72 Asset Management, L.P. (38.4K).
Per Business Quant, the top 10 investors in ASYS for the quarter ending March 2026 include First Eagle Investment Management, LLC (1.66Mn), VANGUARD CAPITAL MANAGEMENT LLC (564.33K), DIMENSIONAL FUND ADVISORS LP (529.35K), ACADIAN ASSET MANAGEMENT LLC (466.84K), MILLENNIUM MANAGEMENT LLC (453.6K), MARSHALL WACE, LLP (417.08K), Pacific Ridge Capital Partners, LLC (405.37K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (365.39K), JANE STREET GROUP, LLC (340.88K), TWO SIGMA INVESTMENTS, LP (266.86K).

Form 13F Holdings

79 Institutional Holders

Report period 31 Mar, 2026

Total shares held 8.30Mn

Of outstanding 5,725.59%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	First Eagle Investment Management, LLC	0001325447	1,664,906	1,148.21%	▲930,560	+126.72%	$19.45Mn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	564,327	389.19%	▲564,327	0.00%	$6.59Mn
3	DIMENSIONAL FUND ADVISORS LP	0000354204	529,351	365.07%	▼142,756	-21.24%	$6.18Mn
4	ACADIAN ASSET MANAGEMENT LLC	0000916542	466,837	321.96%	▲230,829	+97.81%	$5.45K
5	MILLENNIUM MANAGEMENT LLC	0001273087	453,597	312.83%	▲430,849	+1,894.01%	$5.30Mn
6	MARSHALL WACE, LLP	0001318757	417,076	287.64%	▲64,452	+18.28%	$4.87Mn
7	Pacific Ridge Capital Partners, LLC	0001591546	405,371	279.57%	▼222,440	-35.43%	$4.73Mn
8	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	365,387	251.99%	▲18,354	+5.29%	$4.27Mn
9	JANE STREET GROUP, LLC	0001595888	340,879	235.09%	▲15,125	+4.64%	$3.98Mn
10	TWO SIGMA INVESTMENTS, LP	0001179392	266,856	184.04%	▲155,419	+139.47%	$3.12Mn
11	Connor, Clark & Lunn Investment Management Ltd.	0001596800	174,159	120.11%	▲107,282	+160.42%	$2.03Mn
12	Trexquant Investment LP	0001633445	173,889	119.92%	▲84,524	+94.58%	$2.03Mn
13	BlackRock, Inc.	0002012383	145,446	100.31%	▲10,969	+8.16%	$1.70Mn
14	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0001446194	133,938	92.37%	▲53,308	+66.11%	$1.56Mn
15	GEODE CAPITAL MANAGEMENT, LLC	0001214717	132,149	91.14%	▼852	-0.64%	$1.54Mn
16	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0001107261	109,118	75.25%	▲12,800	+13.29%	$1.27Mn
17	RENAISSANCE TECHNOLOGIES LLC	0001037389	108,096	74.55%	▼38,500	-26.26%	$1.26Mn
18	CITADEL ADVISORS LLC	0001423053	106,914	73.73%	▼17,929	-14.36%	$1.25Mn
19	Palisades Investment Partners, LLC	0001427373	100,656	69.42%	▲100,656	0.00%	$1.18Mn
20	Sei Investments Co	0000350894	92,515	63.80%	▲47,282	+104.53%	$1.08Mn

Showing 1 to 20 of 79 holders