Amgen Inc. (NASDAQ:AMGN) is one of Billionaire Ken Fisher’s 15 Most Notable Moves for 2026. Amgen Inc. (NASDAQ:AMGN) is also a staple in the 13F portfolio of Fisher Asset Management. The fund has held a small position in the company since early 2010. This position remained relatively stable through the decade and half since 2010. However, at the end of 2024 and in 2025, the fund has aggressively upped this stake. In the third and fourth quarter of 2025, the position has more than doubled compared to filin ...