Investors closely monitor insider buys. But who are ‘insiders’?An insider is defined by Section 16 of the Security Exchange Act as an officer, director, 10% stockholder, or anyone who possesses information because of their relationship with the company.Of course, many strict rules apply to insiders. Notably, they have a longer holding period than most, a critical aspect investors should know.Several companies – Grief (GEF) , SentinelOne (S) , and Ceasars Entertainment (CZR) – have all seen recent insider ac ...