What did Carl Icahn buy?

I'm curious to know, can you clarify for me exactly what Carl Icahn recently purchased? Was it a specific company, a stake in a particular industry, or perhaps a large chunk of a cryptocurrency? I'm interested in understanding the nature of his investment and what motivated him to make this particular move. His track record of making smart investments is well-known, so I'm eager to learn more about this latest addition to his portfolio.