 WILMINGTON, Ohio--BUSINESS WIRE--Air Transport Services Group, Inc. NASDAQ:ATSG today announced that it will host an investor conference call on Thursday, May 6, 2021, at 10 a.m. Eastern time to review its financial results for the first quarter ended March 31, 2021. The company will issue its first quarter 2021 earnings release on Wednesday, May 5, 2021, after the stock market close. On the day of the conference call, participants should call 800 708-4540 international callers: 847 61 