IRVING KAHN, the chairman of Kahn Brothers, a low-profile New York investment firm, might be Wall Street's oldest active investor. Kahn worked as a teaching assistant for Graham at his lectures at Columbia University that started in 1928, and he helped Graham with statistical material for his first major work, Security Analysis. These are his buys and sells during the first quarter of 2007.
Added Positions: CMCSA, MI, NYT, PFE,
Reduced Positions: CNA, USU,
Added Positions: CMCSA, MI, NYT, PFE,
Reduced Positions: CNA, USU,
