Shawshank, VA 7/11/12 ( StreetBeat ) -- Activist investment firm MHR Fund Management LLC said it increased its stake in Navistar International Corp ( NYSE: NAV ) to 14.95 percent as of July 9. The fund, founded and run by Mark Rachesky, became the largest shareholder in the U.S. truck and engine maker in June by acquiring a 13.6 percent stake, edging out Carl Icahn. Navistar has been struggling for the past year to contain costs of developing a new type of diesel engine for heavy trucks, and has seen its shares lose about half their value in the meantime. Navistar, facing pressure from investors to sell itself or change its engine strategy, said last week it was developing a new engine which is expected to be ready early next year. Navistar shares closed at $21.95 on Tuesday on the New York Stock Exchange. Please contact www.thestreetbeat.com for interest in our latest investor relations platform the “CEO Interview Series” with its host Steve Kanaval. The package includes a one-on-one interview with a seasoned industry professional; published segment to our web site with embedded audio/video file; and a compressed file that can be easily e-mailed out to your current and/or potential investors. Please e-mail bflautt@gmail.com or call (662) 392-0740 for pricing and scheduling. StreetBeat Disclaimer Distributed by Viestly