Amtech Systems Inc: which funds bought and sold

Institutions that bought and sold Amtech Systems shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 85 institutions that filed 13F reports for both quarters added to or opened positions in Amtech Systems, and 32 cut or closed them. Together they added a net 3.8M shares, +51.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 834K shares (+22.6%); index fund managers were net buyers of 1.1M shares (+107.7%). 46 opened a new position and 12 sold out entirely.

Bought, Q2 2026 85 institutions, 46 of them new holders Sold, Q2 2026 32 institutions, 12 of them sold out

Net change, all compared +3.8M shares (+51.4%)

Net change, active managers +834K shares (+22.6%), 17 bought, 10 sold

Buyers versus sellers

institutions compared, 124

85 bought 7 32 sold

Active managers and hedge funds 17 bought · 10 sold · +834K

Index fund managers 9 bought · 0 sold · +1.1M

Other institutions 59 bought · 22 sold · +1.9M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Aigh Capital Management LLC	+1.3M New position	1.3M	$28.9M
First Eagle Investment Management, LLC Active manager	+864K +103.8%	1.7M	$39.2M
Awm Investment Company, Inc.	+690K New position	690K	$15.9M
Blackrock, Inc. Index funds	+618K +424.9%	763K	$17.6M
Regal Partners Ltd	+238K New position	238K	$5.5M
Geode Capital Management, LLC Index funds	+153K +115.5%	285K	$6.6M
Renaissance Technologies LLC Hedge fund	+153K +141.1%	261K	$6M
Acadian Asset Management LLC Active manager	+113K +24.3%	580K	$13.4M
Connor, Clark & Lunn Investment Management Ltd.	+108K +62.1%	282K	$6.5M
Qube Research & Technologies Ltd Hedge fund	+106K +120.0%	195K	$4.5M
State Street Corp Index funds	+99K +171.8%	156K	$3.6M
Vanguard Portfolio Management LLC Index funds	+81K New position	81K	$1.9M
Los Angeles Capital Management LLC Active manager	+64K New position	64K	$1.5M
Northern Trust Corp Index funds	+53K +135.5%	92K	$2.1M
Capelight Capital Asset Management LP	+50K New position	50K	$1.2M
Point72 Asset Management, L.P. Hedge fund	+50K +167.8%	80K	$1.8M
Bank Of New York Mellon Corp	+42K New position	42K	$958,591
Optimus Capital Advisors, LLC	+30K New position	30K	$692,400
Y-Intercept (Hong Kong) Ltd	+30K New position	30K	$681,622
Charles Schwab Investment Management Inc Index funds	+28K New position	28K	$657,041

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
First Eagle Investment Management, LLC Active manager	+864K +103.8%	1.7M	$39.2M
Renaissance Technologies LLC Hedge fund	+153K +141.1%	261K	$6M
Acadian Asset Management LLC Active manager	+113K +24.3%	580K	$13.4M
Qube Research & Technologies Ltd Hedge fund	+106K +120.0%	195K	$4.5M
Los Angeles Capital Management LLC Active manager	+64K New position	64K	$1.5M
Point72 Asset Management, L.P. Hedge fund	+50K +167.8%	80K	$1.8M
Winton Group Ltd Hedge fund	+28K New position	28K	$654,318
Man Group PLC Hedge fund	+14K +42.8%	45K	$1M
Exoduspoint Capital Management, LP Hedge fund	+11K New position	11K	$243,656
Alliancebernstein L.P. Active manager	+10K New position	10K	$116,800

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Pacific Ridge Capital Partners, LLC	−405K Sold out	0	—
Millennium Management LLC Hedge fund	−363K −80.0%	91K	$2.1M
Dimensional Fund Advisors LP	−103K −19.4%	427K	$9.8M
Jane Street Group, LLC	−91K −26.8%	249K	$5.8M
Susquehanna International Group, LLP	−91K −68.0%	43K	$988,793
Arrowstreet Capital, Limited Partnership Hedge fund	−56K −15.5%	309K	$7.1M
Trexquant Investment LP Hedge fund	−54K −31.1%	120K	$2.8M
Sei Investments Co	−43K −46.5%	50K	$1.1M
Squarepoint Ops LLC Hedge fund	−39K Sold out	0	—
Hudson Bay Capital Management LP Hedge fund	−24K Sold out	0	—
Brevan Howard Capital Management LP Hedge fund	−24K Sold out	0	—
Bank Of America Corp	−23K Sold out	0	—
Virtu Financial LLC	−21K Sold out	0	—
HRT Financial LP	−20K Sold out	0	—
Marshall Wace, LLP Hedge fund	−19K −4.4%	399K	$9.2M
State Of Wyoming	−14K −57.1%	10K	$234,724
Jump Financial, LLC	−13K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−12K −4.7%	254K	$5.9M
Walleye Capital LLC Hedge fund	−12K Sold out	0	—
Kovack Advisors, Inc.	−12K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−363K −80.0%	91K	$2.1M
Arrowstreet Capital, Limited Partnership Hedge fund	−56K −15.5%	309K	$7.1M
Trexquant Investment LP Hedge fund	−54K −31.1%	120K	$2.8M
Squarepoint Ops LLC Hedge fund	−39K Sold out	0	—
Hudson Bay Capital Management LP Hedge fund	−24K Sold out	0	—
Brevan Howard Capital Management LP Hedge fund	−24K Sold out	0	—
Marshall Wace, LLP Hedge fund	−19K −4.4%	399K	$9.2M
Two Sigma Investments, LP Hedge fund	−12K −4.7%	254K	$5.9M
Walleye Capital LLC Hedge fund	−12K Sold out	0	—
Citadel Advisors LLC Hedge fund	−668 −0.6%	106K	$2.5M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Aigh Capital Management LLC	1.3M	$28.9M
Awm Investment Company, Inc.	690K	$15.9M
Regal Partners Ltd	238K	$5.5M
Vanguard Portfolio Management LLCIndex funds	81K	$1.9M
Los Angeles Capital Management LLCActive manager	64K	$1.5M
Capelight Capital Asset Management LP	50K	$1.2M
Bank Of New York Mellon Corp	42K	$958,591
Optimus Capital Advisors, LLC	30K	$692,400
Y-Intercept (Hong Kong) Ltd	30K	$681,622
Charles Schwab Investment Management IncIndex funds	28K	$657,041

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Pacific Ridge Capital Partners, LLC	405K	$4.7M
Squarepoint Ops LLCHedge fund	39K	$451,899
Hudson Bay Capital Management LPHedge fund	24K	$281,289
Brevan Howard Capital Management LPHedge fund	24K	$276,980
Bank Of America Corp	23K	$264,575
Virtu Financial LLC	21K	$248,000
HRT Financial LP	20K	$235,000
Jump Financial, LLC	13K	$155,110
Kovack Advisors, Inc.	12K	$144,595
Walleye Capital LLCHedge fund	12K	$142,461

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 112
Ten largest holders: 61.7%
Index fund managers: 18.4%
Active managers and hedge funds: 39.9%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	17	10	5	4	+834K	+22.6%
Index fund managers	9	0	3	0	+1.1M	+107.7%
Other institutions	59	22	38	8	+1.9M	+69.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Amtech Systems.

Only managers that filed a holdings report for both quarters are compared (124 here). 1 other holder is left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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