 CHARLOTTE, N.C., June 14, 2021 GLOBE NEWSWIRE -- Ballantyne Strong, Inc. NYSE American: BTN the Company or Ballantyne Strong today announced that it is set to join the Russell Microcap Index at the conclusion of the 2021 Russell indexes annual reconstitution, effective after the U.S. market opens on Monday, June 28, 2021, according to a preliminary list of additions posted by Russell on June 4, 2021. 