Ernest E.  Maddock net worth and biography

Ernest Maddock Biography and Net Worth

Director of Ultra Clean

Ernest E. Maddock has served as a director of the UCT Board since June 2018. Mr. Maddock retired from Micron Technology in 2018, where he served as Senior Vice President and Chief Financial Officer. Before joining Micron, Mr. Maddock held leadership positions at multiple global companies, including Riverbed Technology, where he served as Executive Vice President and Chief Financial Officer and was additionally responsible for worldwide operations and information technology. Prior to Riverbed, he spent 15 years at Lam Research Corporation, rising to Executive Vice President and Chief Financial Officer. His previous roles at Lam included Vice President, Customer Support Business Group, Group Vice President and Senior Vice President of Global Operations. Mr. Maddock holds a B.S. in Industrial Management from the Georgia Institute of Technology and an M.B.A. from Georgia State University.

Mr. Maddock brings to the Board significant experience in business, operations and finance. His knowledge of the critical drivers across the semiconductor ecosystem will bring valuable guidance to executing UCT’s growth strategy in this exciting market.

What is Ernest E. Maddock's net worth?

The estimated net worth of Ernest E. Maddock is at least $275.66 thousand as of March 7th, 2025. Mr. Maddock owns 11,000 shares of Ultra Clean stock worth more than $275,660 as of July 16th. This net worth estimate does not reflect any other assets that Mr. Maddock may own. Learn More about Ernest E. Maddock's net worth.

How do I contact Ernest E. Maddock?

The corporate mailing address for Mr. Maddock and other Ultra Clean executives is 26462 CORPORATE AVENUE, HAYWARD CA, 94545. Ultra Clean can also be reached via phone at (510) 576-4400 and via email at [email protected]. Learn More on Ernest E. Maddock's contact information.

Has Ernest E. Maddock been buying or selling shares of Ultra Clean?

Ernest E. Maddock has not been actively trading shares of Ultra Clean during the last ninety days. Most recently, on Friday, March 7th, Ernest E. Maddock bought 10,000 shares of Ultra Clean stock. The stock was acquired at an average cost of $24.29 per share, with a total value of $242,900.00. Following the completion of the transaction, the director now directly owns 11,000 shares of the company's stock, valued at $267,190. Learn More on Ernest E. Maddock's trading history.

Who are Ultra Clean's active insiders?

Ultra Clean's insider roster includes Harjinder Bajwa (COO), Bill Bentinck (President, Services Division), Vijayan Chinnasami (COO), Paul Cho (General Counsel), Christopher Cook (President, Products Division), Clarence Granger (Director), David Ibnale (Director), Emily Liggett (Director), Ernest Maddock (Director), Jeffrey McKibben (Chief Information Officer), Jamie Palfrey (Chief Human Resources Officer), Sheri Savage (CFO), James Scholhamer (CEO & Director ), James Scholhamer (CEO), Jacqueline Seto (Director), and Joe Williams (Insider). Learn More on Ultra Clean's active insiders.

Are insiders buying or selling shares of Ultra Clean?

During the last twelve months, Ultra Clean insiders bought shares 5 times. They purchased a total of 40,500 shares worth more than $1,261,685.00. During the last twelve months, insiders at the semiconductor company sold shares 4 times. They sold a total of 23,300 shares worth more than $530,485.22. The most recent insider tranaction occured on June, 6th when General Counsel Paul Yoonku Cho sold 4,084 shares worth more than $86,009.04. Insiders at Ultra Clean own 1.9% of the company. Learn More about insider trades at Ultra Clean.

Information on this page was last updated on 6/6/2025.

Ernest E. Maddock Insider Trading History at Ultra Clean

Transaction DateBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
3/7/2025Buy10,000$24.29$242,900.0011,000View SEC Filing Icon  
7/31/2018Buy1,000$13.40$13,400.006,430View SEC Filing Icon  
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Ernest E. Maddock Buying and Selling Activity at Ultra Clean

This chart shows Ernest E Maddock's buying and selling at Ultra Clean by year and by quarter.

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Ultra Clean Company Overview

Ultra Clean logo
Ultra Clean Holdings, Inc. develops and supplies critical subsystems, components and parts, and ultra-high purity cleaning and analytical services for the semiconductor industry in the United States and internationally. The company provides ultra-clean valves, high purity connectors, industrial process connectors and valves, pneumatic actuators, manifolds and safety solutions, hoses, pressure gauges, and gas line and component heaters; chemical delivery modules that deliver gases and reactive chemicals in a liquid or gaseous form from a centralized subsystem to the reaction chamber; and gas delivery systems, such as weldments, filters, mass flow controllers, regulators, pressure transducers and valves, component heaters, and an integrated electronic and/or pneumatic control system. It also offers various industrial and automation production equipment; fluid delivery systems consist of one or more chemical delivery units, including PFA tubing, filters, flow controllers, regulators, component heaters, and an integrated electronic and/or pneumatic control system; precision robotic systems; top-plate assemblies; frame assemblies; process modules, a subsystem of semiconductor manufacturing tools that process integrated circuits onto wafers; and other high-level assemblies. In addition, the company provides tool chamber parts cleaning and coating services; micro-contamination analysis services for tool parts, wafers and depositions, chemicals, cleanroom materials, deionized water, and airborne molecular contamination; and analytical verification services for process tool chamber part cleaning. It primarily serves original equipment manufacturing customers in the semiconductor capital equipment and semiconductor integrated device manufacturing industries, as well as display, consumer, medical, energy, industrial, and research equipment industries. The company was founded in 1991 and is headquartered in Hayward, California.
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Today's Range

Now: $25.06
Low: $24.93
High: $25.53

50 Day Range

MA: $21.76
Low: $19.36
High: $25.06

2 Week Range

Now: $25.06
Low: $16.66
High: $56.47

Volume

463,226 shs

Average Volume

493,152 shs

Market Capitalization

$1.13 billion

P/E Ratio

40.42

Dividend Yield

N/A

Beta

2.07