 WILMINGTON, Ohio--BUSINESS WIRE--Air Transport Services Group, Inc. NASDAQ:ATSG today announced that it will host an investor conference call on Friday, August 6, 2021, at 10 a.m. Eastern time to review its financial results for the second quarter ended June 30, 2021. The company will issue its second quarter 2021 earnings release on Thursday, August 5, 2021, after the stock market closes. On the day of the conference call, participants should call 800 708-4540 international callers: 84 