Former US Democratic congressman Harold Ford, Jr. was sacked by Morgan Stanley for inappropriate conduct.
At least one woman, who is not a Morgan Stanley employee but interacted with Ford in a professional capacity, was interviewed by Morgan Stanley's HR department as part of the investigation.
The unnamed woman named Ford Jr., 47, in an interview with The Huffington Post on Thursday and showed emails which she said proved how he repeatedly asked her out for drinks after "grabbing" her during a meeting in Manhattan several years ago.
"This simply did not happen", Mr. Ford wrote.
Morgan Stanley spokeswoman Margaret Draper said Ford was let go for "conduct inconsistent with our values and in violation of our policies".
In a statement of his own, Ford categorically denied the accusations, saying his after-work activity was entirely consistent with his professional role and that he would file suit against the woman who accused him.
Morgan Stanley declined to say specifically what prompted the firing.
"I have never forcibly grabbed any woman or man in my life", he said, in a statement released by his spokesman, Davidson Goldin.
"I support and have tremendous respect for the courageous women now speaking out in this important national dialogue", Ford said. He also said he intends to file a lawsuit against Morgan Stanley over his "improper termination" and separately sue a HuffPost reporter over "these false claims".
Since leaving Congress in 2007, Ford has worked for two financial services companies, first for Merrill Lynch and then Morgan Stanley, which he joined in 2011 as a managing director. Ford Jr. replaced his father upon retirement and kept the seat for 10 years.
At Morgan Stanley, he was tasked with 'managing relationships with corporate directors, senior executives and institutional investors, as well as private clients'.
He is a frequent television commentator and has appeared on NBC, MSNBC, and CNBC.
Ford did not immediately respond to requests for comment.