NEW YORK--(BUSINESS WIRE)--Halper Sadeh LLC, an investor rights law firm, is investigating whether certain officers and directors of Amgen Inc. (NASDAQ: AMGN) breached their fiduciary duties to shareholders. If you currently own Amgen stock and acquired shares on or before July 29, 2020, you may be able to seek corporate governance reforms, the return of funds back to the company, a court-approved financial incentive award, or other relief and benefits. Please click here to learn more about you. ...