Complex sentence: In 1973, with rumors that the Mexican Government would nationalize the company, Ludwig sold his interest in Exportadora de Sal, SA to Mitsubishi, who now own 49% with the Mexican government holding the controlling interest.
Split into simpler sentences: In 1973, with rumors that the Mexican Government would nationalize the company, Ludwig sold his interest in Exportadora de Sal, SA to Mitsubishi. It owns 49%, with the Mexican government holding the controlling interest.