Luminar's shares have fallen 16% since the downgrade. Now, the company's CFO is taking his rebuttal directly to shareholders. Activist investor Jana Partners has built a "significant" position in semiconductor firm Wolfspeed, according to a letter to Wolfspeed's board viewed by CNBC. [Read more]
Disney Entertainment CTO Aaron LaBerge is leaving the company for personal reasons, according to a company memo. A search for his replacement is underway. [Read more]