Congress Asset Management Co. lowered its stake in shares of Onto Innovation Inc. (NYSE:ONTO – Free Report) by 99.1% during the 2nd quarter, HoldingsChannel.com reports. The institutional investor owned 4,233 shares of the semiconductor company’s stock after selling 448,660 shares during the period. Congress Asset Management Co.’s holdings in Onto Innovation were worth $427,000 at the end of the most recent reporting period. Banque Cantonale Vaudoise purchased a new stake in shares of Onto Innovation during the 1st quarter valued at $29,000. Onto Innovation Stock Down 0.1%Shares of Onto Innovation stock opened at $127.81 on Friday.