Complex sentence: Icahn began his career on Wall Street as a stockbroker in 1961 and in 1968, he formed Icahn & Co., a securities firm that focused on risk arbitrage and options trading.
Split into simpler sentences: Icahn began his career on Wall Street as a stockbroker in 1961. In 1968, he formed Icahn & Co., a securities firm that focused on risk arbitrage and options trading.