From friend-of-the-blog Chuck Jones, writing for Forbes:
Carl Icahn was very visible when he owned Apple shares. He met with Tim Cook, Apple’s CEO, and wrote letters and analysis that he posted on his website. His first public announcement was on August 13, 2013 with two tweets saying he had a large position in Apple, had talked with Cook and that a large buyback should be done now since he believed that the stock was extremely undervalued…
On April 28, 2016, Icahn announced that he had sold all of his 52 million plus shares making about a $2 billion profit. He said he sold based on concerns regarding China which I delved into. From my calculations on the 52 million plus shares he sold them for about $105…
Unfortunately for Icahn he sold a year plus too early. While the stock traded down to the $90’s just after he sold, the shares have been on an upward move since then as can be seen on the StockCharts.com chart below.
If Icahn had held onto all his shares the difference between what he sold them for, about $5.5 billion, would now be worth $9.2 billion or $3.7 billion in additional profit.
My take: Icahn was never really interested in the company; what he cared about was its cash hoard.
See also: The Carl Icahn effect.