During HPE's fourth quarter earnings call, Whitman said she would relinquish the CEO title at the end of January but remain on the board. Longtime HPE (HPE) executive Antonio Neri, who had been viewed as Whitman's likely successor after he was promoted to president in June, will become CEO Feb. 1. Still, while Wall Street had been prepared for the succession plan, investors reacted negatively to the news. HPE stock fell more than 7% on the news in after-hours trading, despite the fact that the company reported earnings that beat analysts' expectations. Whitman, 61 with a multi-billion dollar net worth, is the only woman to serve as CEO of more than one Fortune 500 company. She ran eBay for a decade through 2008, then took over as CEO of Hewlett-Packard in late 2011. Two years ago, she oversaw the biggest corporate split (by revenue) in history, breaking HP and Hewlett-Packard Enterprise apart, staying on as CEO of HPE.