Amtech Systems Inc (ASYS) Institutional Ownership

Ownership Summary

Amtech Systems Inc (NASDAQ:ASYS) has 66 institutional investors with active 13F positions as of December 2025.

• These investors collectively held 42.2% of Amtech Systems's 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.
• Of these 66 holders, 48 added to their stakes in Amtech Systems, 13 trimmed positions, and 5 made no changes.
• In total, institutional investors held 6.2Mn shares in Amtech Systems as of 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 biggest buyers of Amtech Systems for the quarter ending December 2025 included 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).
• The biggest sellers of Amtech Systems 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).
• Per Business Quant, the top 10 investors in ASYS for the quarter ending December 2025 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).