 WASHINGTON, Sept. 23, 2021 PRNewswire -- Cogent Communications Holdings, Inc. Cogent NASDAQ: CCOI, one of the largest Internet service providers in the world, today announced that Dave Schaeffer, Cogents Chief Executive Officer, and Sean Wallace, Cogents Chief Financial Officer, will participate in the following conferences: The Deutsche Bank 2021 Leveraged Finance Conference which is being held virtually. 