Ultra Clean Holdings, Inc.
A supplier of critical parts and services for the semiconductor industry, Ultra Clean Holdings designs gas and fluid delivery systems, precision robotics, and process modules used in chip-making equipment, and runs ultra-high purity parts cleaning and coating services for chipmakers' tools. Its customers include equipment makers like Applied Materials and Lam Research as well as semiconductor device manufacturers, with operations reaching Asia Pacific and EMEA.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.