[5] While at Yale Landesman was also involved in managing a private mutual fund and a racehorse he had bought.

[5] This success attracted the attention of James H. Binger who shared two passions with Landesman: Broadway theater and horseracing.

After taking the helm at Jujamcyn he shifted its business model away from the historical focus of renting of theatre facilities to shows and into a more active posture as a combination of a theater owner and a developer of new plays.

Landesman grew up a fan of the St. Louis Cardinals, and later in life he became a part-owner of the Kenosha Twins (later the Fort Wayne Wizards).

Landesman has also spoken at forums and written numerous articles (mostly in the New York Times arts section), focusing mainly on the problematic relationship between the commercial and not-for-profit sectors of the American theater.

[8] Landesman has been active on numerous boards, including the Municipal Art Society, the Times Square Alliance, and The Educational Foundation of America.