AMTECH SYSTEMS INC (ASYS) Stock Institutional Trading Activity


AMTECH SYSTEMS INC (ASYS) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC and First Eagle U.S. Value. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q2 2021First Eagle U.S. ValueBuy7,0927,092$68
Q2 2021Renaissance Technologies LLCBuy77,600222,696$2,147
Q1 2021Renaissance Technologies LLCSell-40,366145,096$1,715
Q4 2020Renaissance Technologies LLCBuy36,600185,462$1,183
Q3 2020Renaissance Technologies LLCBuy102,500148,862$728
Q2 2020Renaissance Technologies LLCBuy23,59646,362$226
Q1 2020Renaissance Technologies LLCSell-540,26622,766$99
Q1 2018Renaissance Technologies LLCBuy16,100563,032$4,121
Q4 2017Renaissance Technologies LLCBuy175,009546,932$5,508
Q3 2017Renaissance Technologies LLCBuy242,787371,923$4,456
Q2 2017Renaissance Technologies LLCBuy23,400129,136$1,090
Q1 2017Renaissance Technologies LLCBuy6,500105,736$582
Q4 2016Renaissance Technologies LLCBuy22,60099,236$422
Q3 2016Renaissance Technologies LLCBuy16,20076,636$380
Q2 2016Renaissance Technologies LLCBuy4,60060,436$361
Q1 2016Renaissance Technologies LLCSell-3,70055,836$362
Q4 2015Renaissance Technologies LLCSell-35,30059,536$373
Q3 2015Renaissance Technologies LLCSell-47,60094,836$408
Q2 2015Renaissance Technologies LLCSell-69,364142,436$1,480
Q1 2015Renaissance Technologies LLCBuy29,004211,800$2,368
Q4 2014Renaissance Technologies LLCSell-6,996182,796$1,865
Q3 2014Renaissance Technologies LLCBuy33,296189,792$2,031
Q2 2014Renaissance Technologies LLCSell-2,600156,496$1,914
Q1 2014Renaissance Technologies LLCBuy34,342159,096$1,936
Q4 2013Renaissance Technologies LLCBuy15,263124,754$868
Q3 2013Renaissance Technologies LLCSell-1,105109,491$799
Q2 2013Renaissance Technologies LLCBuy110,596110,596$703

Frequently asked questions about ASYS activity

  • Which institutional owners are buying ASYS?

    Institutional owners buying ASYS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ASYS activity?

    "Buy" means an investor increased their reported position in ASYS compared to the prior reporting period. This reflects growing exposure to AMTECH SYSTEMS INC (ASYS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ASYS increasing?

    Institutional interest in ASYS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.