German lender Commerzbank appointed former state bank executive Hans-Jörg Vetter as its new chairman, ignoring opposition from its second-largest shareholder, Cerberus Capital Management.

Avnet Inc. rallied in the extended session Monday after the electronic components distributor forecast strong results for the quarter while announcing the departure of its chief executive. Avnet shares surged 20% after hours, following a 1.1% rise to close the regular...

Harmonic Inc. shares surged in the extended session Monday after the video-services company topped Wall Street estimates for the quarter and issued a strong outlook for the year. Harmonic shares jumped 17% after hours, following a 0.7% rise in the regular session to...