ASYS — AMTECH SYS INC COMMON

Ownership history in ESSEX INVESTMENT MANAGEMENT CO LLC  ·  30 quarters on record

This page tracks every 13F SEC filing in which ESSEX INVESTMENT MANAGEMENT CO LLC reported a position in AMTECH SYS INC COMMON (ASYS). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
0.47% (2023 Q2)
Avg. % of fund
0.24%
First filed
2008 Q1
Last filed
2025 Q4
Quarters held
30
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q4 UNCHANGED 37,816 — 0% 0.07% $475K $12.55
2025 Q3 REDUCED 37,816 -105,559 -73.6% 0.05% $350K $9.26
2023 Q4 REDUCED 143,375 -204,062 -58.7% 0.12% $602K $4.20
2023 Q3 REDUCED 347,437 -7,063 -2.0% 0.43% $2.6M $7.62
26 older quarters hidden  —  Sign in free or upgrade to Premium to see full history
% of Fund (quarterly)    ASYS price (monthly, adj. close)

Other funds also holding ASYS

As of 2025 Q4 — sorted by position size

Pacific Ridge Capital Partners, LLC 3Y 7Y 1.73% IRONWOOD INVESTMENT MANAGEMENT LLC 3Y 7Y 0.15% Informed Momentum Co LLC 3Y 7Y 0.1% GSA CAPITAL PARTNERS LLP 3Y 7Y 0.03% BRIDGEWAY CAPITAL MANAGEMENT, LLC 3Y 7Y 0.03% VILLERE ST DENIS J & CO LLC 3Y 7Y 0.03% XTX Topco Ltd 3Y 0.02% Kovack Advisors, Inc. 3Y 7Y 0.02% JAMES INVESTMENT RESEARCH, INC. 3Y 7Y 0.02% OCCUDO QUANTITATIVE STRATEGIES LP 3Y 0.02%
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