SHIM Shimmick Corporation

Shimmick Corporation (“Shimmick” or the “Company”) (Nasdaq: SHIM), a leading water infrastructure company, today announced that it has signed a $27,583,595 subcontract for electrical work on the Sunol Valley Water Treatment Plant Ozonation project. The prime contract, valued at $234,782,000, was awarded to J.F. Shea Construction, Inc. by the San Francisco Public Utilities Commission (SFPUC) on May 14, 2024.

The project, located in Sunol, Alameda County, aims to control the taste and odor of raw water supplied to the Sunol Valley Water Treatment Plant. It involves the construction of an ozone treatment facility and associated infrastructure, including an Ozone Generator Building, an Ozone Contact Basin, and various supporting systems. Shimmick's scope of work includes installing high-voltage power systems, and instrumentation and controls for the new ozonation facility.

"We are thrilled to be part of this critical infrastructure project that will significantly improve water quality for millions of Bay Area residents," said Steve Richards, Chief Executive Officer. "This contract underscores our expertise in complex water treatment projects and our ability to perform critical specialized electric work that leverages our in-house capabilities."

This project represents a significant investment in improving water quality for the San Francisco Bay Area. The ozonation system will provide additional primary disinfection, improve treatment reliability, and offer an extra barrier against potential emerging contaminants of concern.

About Shimmick

Shimmick (NASDAQ: SHIM) is a leading provider of water infrastructure solutions nationwide. Shimmick has a long history of working on complex water projects, ranging from the world’s largest wastewater recycling and purification system in California to the iconic Hoover Dam. Shimmick is led by industry veterans, many with over 20 years of experience, and works closely with its customers to deliver complete solutions, including long-term operations and maintenance.

Media Contact:Tonya Sandman303-478-4987Tonya.sandman@shimmick.com

Investor Contact:Investor Relations+1-949-704-2350IR@shimmick.com