Ceradyne, Inc. to Release Fourth-Quarter, Twelve-Month 2009 Financial Results on Tuesday, February 23, 2010

Ceradyne, Inc. (Nasdaq: CRDN) will release financial results for its fourth quarter and fiscal year ended December 31, 2009 before the market open on Tuesday, February 23, 2010. Management will also conduct a conference call to review the Company’s financial results and the outlook for 2010.

Any investor or interested individual can listen to the teleconference, which is scheduled to begin at 8:00 a.m. PST (11:00 a.m. EST) on February 23. To participate in the teleconference, please call toll-free 877-717-3046 (or 706-634-6364 for international callers) approximately 10 minutes prior to the above start time and provide Conference ID 55208513.

One may also listen to the teleconference live via the Internet at www.ceradyne.com or www.earnings.com. For those unable to attend, these web sites will host an archive of the call.

A telephone playback will be available beginning at 11 a.m. PST on February 23 through 11 a.m. PST on February 25, 2010. The playback can be accessed by calling 800-642-1687 (or 706-645-9291 for international callers) and providing Conference ID 55208513.

Ceradyne develops, manufactures and markets advanced technical ceramic products and components for defense, industrial, automotive/diesel and commercial applications. Additional information about the Company can be found at www.ceradyne.com.