[ in·sid·er trade ]
Insider is a term describing a director or senior officer of a publicly traded company, as well as any person or entity, that beneficially owns more than 10% of a company's voting shares. Insiders have to comply with strict disclosure requirements with regard to the sale or purchase of the shares of their company. 

Director increases his share of Biopharma company by 9 million shares.

Muneer Satter, a Director at Aileron Therapeutics, Inc., purchased $9,900,000 worth of stock and increasing his shares to 16,609,449.

CEO of educational services company buy 40,000 shares of company

Michael Ross Pope buys shares of company increasing his holdings to 287,942

Chief Medical Director buys shares of Biopharma company

Kenneth Pienta buys 2,720 shares of Cue Biopharma, Inc for $40,980