Photronics (PLAB) stock plunged 12.36% in intraday trading on Wednesday following a trifecta of disappointing news. The semiconductor equipment manufacturer reported weaker-than-expected second-quarter results, provided soft guidance for the third quarter, and announced an unexpected CEO transition.

For the fiscal second quarter, Photronics reported non-GAAP earnings of $0.40 per share, falling short of the $0.49 analyst consensus and down from $0.46 a year earlier. Revenue also disappointed at $211 million, missing the $212.1 million estimate and declining from $217 million in the same quarter last year. The company's performance in both its IC and FPD segments showed year-over-year declines.

Adding to investor concerns, Photronics provided weak guidance for the fiscal third quarter. The company expects non-GAAP EPS of $0.35 to $0.41 on revenue of $200 million to $208 million, significantly below analyst expectations of $0.50 EPS and $219.8 million in revenue. This outlook suggests a continued challenging environment for the company in the near term.

Further complicating matters, Photronics announced a sudden leadership change. Frank Lee has stepped down from his role as CEO, with Chairman George Macricostas appointed as the new Chief Executive, effective immediately. While leadership transitions can sometimes be viewed positively, the unexpected nature of this change, coupled with the weak financial results and guidance, has clearly rattled investor confidence.