David P. Warren
David Warren is a London-based exchange and bank executive who currently serves as the chief financial officer at the London Stock Exchange. He took over the position on July 2, 2012. The exchange announced in October 2019 that Warren will step down from the position and retire by the end of 2020.
Warren served as CFO at Nasdaq OMX from 2001 to 2009. He joined Nasdaq in January 2001 as its chief administrative officer. He stepped down from that position in July 2009. Adena Friedman, then Nasdaq's executive vice president of corporate strategy and global data products, took over the position. Warren remained with the company through the end of 2009. Following that, he spent two years as a senior adviser to the CEO of NASDAQ OMX.
Warren joined Nasdaq from the Long Island Power Authority (LIPA), where he was chief financial officer. While there, he led the efforts to raise nearly $7 billion to finance the acquisition of the Long Island Lighting Company. He managed seven separate debt offerings over a five-month period, including a $3.5 billion issue of tax-exempt bonds, the largest single offering ever sold in the municipal market. The Institutional Investor and Euromoney magazine named this issue “Deal of the Year.” 
Before his appointment at LIPA, he served as deputy treasurer of the State of Connecticut.
He holds a masters of business administration degree from the Yale School of Management and a bachelor of arts degree from Wesleyan University.
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