Amtech Systems Inc (ASYS) Institutional Ownership

Ownership Summary

Amtech Systems Inc (NASDAQ:ASYS) has 66 institutional investors that have filed 13F reports for the period ending December 2025.

• These investors held 42.2% of 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.
• Altogether, these fund groups held 6.2Mn shares in ASYS by December 2025, up by 1.83Mn shares quarter on quarter, and up 650.81K shares year over year.
• First Eagle Investment Management, LLC is the top holder of Amtech Systems as of December 31, 2025, with 1.66Mn shares representing 11.34% of outstanding stock.
• The largest buyers of Amtech Systems for the quarter ending December 2025 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).
• Top sellers of ASYS stock for the quarter ending December 2025 included 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).
• Business Quant data shows the 10 biggest positions in Amtech Systems as of December 2025 are held by 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).