AMTECH SYSTEMS INC (ASYS) Institutional Shareholders
AMTECH SYSTEMS INC (ASYS) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $241.55M in ASYS holdings during the latest filing period.
Aigh Capital Management Llc is currently the largest disclosed institutional shareholder of ASYS tracked by InsiderSet, reporting ownership valued at approximately $28.90M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $17.78M, representing an estimated loss of -38.47% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 59% of the total disclosed ASYS value among the investors covered in this analysis. Major shareholders include Aigh Capital Management Llc, First Eagle U.S. Value, Blackrock, Inc., and several other long-term asset managers with concentrated positions in AMTECH SYSTEMS INC (ASYS).
This page ranks the largest institutional ASYS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
113
Total Reported Value
$241.55M
Largest Holder
Aigh Capital Management Llc
Largest Position
$28.90M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
131
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Aigh Capital Management Llc | 2.62% | 1,252,000 | $28,896,160 | $17,778,400 | -$11,117,760 | -38.47% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.03% | 848,426 | $19,581,672 | $12,047,649 | -$7,534,023 | -38.47% |
| Blackrock, Inc. | 0.00% | 763,487 | $17,621,279 | $10,841,515 | -$6,779,764 | -38.47% | |
| Awm Investment Company, Inc. | 1.38% | 690,000 | $15,925,200 | $9,798,000 | -$6,127,200 | -38.47% | |
| Vanguard Capital Management Llc | 0.00% | 580,502 | $13,397,986 | $8,243,128 | -$5,154,858 | -38.47% | |
| Acadian Asset Management Llc | 0.02% | 580,278 | $13,388,000 | $8,239,948 | -$5,148,052 | -38.45% | |
| Dimensional Fund Advisors Lp | 0.00% | 426,694 | $9,842,868 | $6,059,055 | -$3,783,813 | -38.44% | |
| Marshall Wace, Llp | 0.01% | 398,564 | $9,198,858 | $5,659,609 | -$3,539,249 | -38.47% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 308,896 | $7,129,320 | $4,386,323 | -$2,742,997 | -38.47% | |
| Geode Capital Management, Llc | 0.00% | 284,836 | $6,575,423 | $4,044,671 | -$2,530,752 | -38.49% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | 282,388 | $6,517,515 | $4,009,910 | -$2,507,605 | -38.47% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 260,605 | $6,014,763 | $3,700,591 | -$2,314,172 | -38.47% |
| Two Sigma Investments, Lp | 0.00% | 254,367 | $5,870,790 | $3,612,011 | -$2,258,779 | -38.47% | |
| Jane Street Group, Llc | 0.00% | 249,465 | $5,757,652 | $3,542,403 | -$2,215,249 | -38.47% | |
| Regal Partners Ltd | 0.30% | 237,503 | $5,481,569 | $3,372,543 | -$2,109,026 | -38.47% | |
| Qube Research & Technologies Ltd | 0.00% | 194,714 | $4,493,999 | $2,764,939 | -$1,729,060 | -38.47% | |
| State Street Corp | 0.00% | 155,849 | $3,596,995 | $2,213,056 | -$1,383,939 | -38.47% | |
| Trexquant Investment Lp | 0.02% | 119,750 | $2,763,830 | $1,700,450 | -$1,063,380 | -38.47% | |
| Bridgeway Capital Management, Llc | 0.05% | 111,472 | $2,572,774 | $1,582,902 | -$989,872 | -38.47% | |
| Citadel Advisors Llc | 0.00% | 106,246 | $2,452,158 | $1,508,693 | -$943,465 | -38.47% | |
| Palisades Investment Partners, Llc | 0.67% | 102,691 | $2,370,140 | $1,458,212 | -$911,928 | -38.48% | |
| Northern Trust Corp | 0.00% | 91,857 | $2,120,059 | $1,304,369 | -$815,690 | -38.47% | |
| Millennium Management Llc | 0.00% | 90,626 | $2,091,648 | $1,286,889 | -$804,759 | -38.47% | |
| Morgan Stanley | 0.00% | 82,999 | $1,915,617 | $1,178,586 | -$737,031 | -38.47% | |
| Vanguard Fiduciary Trust Co | 0.00% | 81,805 | $1,888,059 | $1,161,631 | -$726,428 | -38.47% | |
| Vanguard Portfolio Management Llc | 0.00% | 81,351 | $1,877,581 | $1,155,184 | -$722,397 | -38.47% | |
| Point72 Asset Management, L.P. | 0.00% | 79,684 | $1,839,107 | $1,131,513 | -$707,594 | -38.47% | |
| Ubs Group Ag | 0.00% | 79,085 | $1,825,282 | $1,123,007 | -$702,275 | -38.47% | |
| Informed Momentum Co Llc | 0.15% | 72,579 | $1,675,123 | $1,030,622 | -$644,501 | -38.47% | |
| Bnp Paribas Financial Markets | 0.00% | 71,293 | $1,645,442 | $1,012,361 | -$633,081 | -38.47% | |
| Xtx Topco Ltd | 0.02% | 69,832 | $1,611,723 | $991,614 | -$620,109 | -38.47% | |
| Los Angeles Capital Management Llc | 0.01% | 63,562 | $1,467,011 | $902,580 | -$564,431 | -38.47% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 54,829 | $1,265,453 | $778,572 | -$486,881 | -38.47% | |
| Goldman Sachs Group Inc | 0.00% | 54,066 | $1,247,844 | $767,737 | -$480,107 | -38.47% | |
| Capelight Capital Asset Management Lp | 0.58% | 50,000 | $1,154,000 | $710,000 | -$444,000 | -38.47% | |
| Sei Investments Co | 0.00% | 49,501 | $1,142,483 | $702,914 | -$439,569 | -38.47% | |
| Man Group Plc | 0.00% | 45,224 | $1,043,770 | $642,181 | -$401,589 | -38.47% | |
| New York State Common Retirement Fund | 0.00% | 44,009 | $1,015,728 | $624,928 | -$390,800 | -38.47% | |
| Hillsdale Investment Management Inc. | 0.02% | 43,080 | $994,286 | $611,736 | -$382,550 | -38.47% | |
| Susquehanna International Group, Llp | 0.00% | 42,842 | $988,793 | $608,356 | -$380,437 | -38.47% | |
| Bank Of New York Mellon Corp | 0.00% | 41,533 | $958,591 | $589,769 | -$368,822 | -38.48% | |
| Ritholtz Wealth Management | 0.01% | 41,374 | $954,912 | $587,511 | -$367,401 | -38.47% | |
| Occudo Quantitative Strategies Lp | 0.05% | 38,616 | $891,257 | $548,347 | -$342,910 | -38.47% | |
| Engineers Gate Manager Lp | 0.01% | 38,552 | $889,780 | $547,438 | -$342,342 | -38.47% | |
| Gsa Capital Partners Llp | 0.06% | 37,814 | $873,000 | $536,959 | -$336,041 | -38.49% | |
| Essex Investment Management Co Llc | 0.11% | 37,761 | $871,524 | $536,206 | -$335,318 | -38.47% | |
| Merit Financial Group, Llc | 0.01% | 37,000 | $853,960 | $525,400 | -$328,560 | -38.47% | |
| Empowered Funds, Llc | 0.00% | 34,672 | $800,230 | $492,342 | -$307,888 | -38.47% | |
| American Century Companies Inc | 0.00% | 34,536 | $797,091 | $490,411 | -$306,680 | -38.47% | |
| Janney Montgomery Scott Llc | 0.00% | 30,760 | $710,000 | $436,792 | -$273,208 | -38.48% |
Frequently asked questions about ASYS
Who owns the most ASYS stock?
The largest holders of ASYS are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for AMTECH SYSTEMS INC (ASYS).
Is ASYS widely held by superinvestors?
Many widely followed stocks like ASYS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ASYS is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.