Obviously Bill Gates is a household name and in the tech community everyone knows who is Steve Ballmer. However not many people know who Paul Allen is even though he was one of the founder of Microsoft at the very start. In 1982 Paul Allen was diagnosed with cancer and Bill and Steve were worried that if Paul died the shares of the company would go to someone else along with control of the company. While Paul was literally getting cancer treatment, Bill and Steve were scheming to dilute the shares of the company to wrestle the control of the company away from Paul. Fortunately for Paul he survived the cancer. It really doesn't put Bill Gates and Steve Ballmer in very good light though. I remember reading about this from Robert X. Cringely's blog about two decades ago and I heard Paul Allen wrote about his version of this story in his memoir before his death.

Edit: I tried to find the original Robert X. Cringely's story from back in 2006 but looks like that link is broken but he did referenced it in 2011 when Paul Allen's book was released.

https://www.cringely.com/2011/03/30/i-told-you-so/