Medpace Holdings (MEDP) experienced a significant pre-market plunge of 17.29% on Thursday, extending heavy losses from the previous session.

The sharp decline was triggered by the announcement that company President Jesse Geiger has notified the board of his intention to resign, raising immediate concerns about management stability and strategic continuity. This negative sentiment was compounded by an investor lawsuit alleging misleading book-to-bill guidance, which challenges the credibility of the company's future targets. Furthermore, Deutsche Bank cut its price target on Medpace from $480 to $425 just before the pre-market session, adding downward pressure.

The sell-off represents a continuation of negative investor reaction that began in the post-market session, where the stock fell over 12% on the same resignation news, highlighting sustained uncertainty surrounding the leadership transition.