Shares of Insight Enterprises (NSIT) plummeted 5.23% in pre-market trading on Thursday following the release of disappointing third-quarter results and the announcement of CEO Joyce Mullen's planned retirement.

The IT services provider reported Q3 sales of $2.004 billion, missing analyst estimates of $2.154 billion by 6.98%. The company's adjusted earnings per share of $2.43 also fell short of the expected $2.49. Despite a 11% increase in adjusted diluted EPS year-over-year, the earnings miss and a 4% decline in consolidated net sales have sparked investor concerns.

Adding to the negative sentiment, Insight Enterprises announced that CEO Joyce Mullen intends to retire in the first quarter of 2026. The company has initiated a search for her successor, with Mullen agreeing to stay on as an advisor to support the leadership transition. This unexpected leadership change, coupled with the underwhelming financial results, has likely contributed to the sharp stock decline as investors reassess the company's future prospects and growth strategy.