An Adobe Inc. shareholder has filed a derivative suit in the District of Delaware, claiming the company’s board and officers breached their duty to investors by acting as if a competitor was not a market threat, then making a deal to acquire that competitor for $20 billion.

The shareholder plaintiff, represented by Rigrodsky Law and the Grabar Law Office, claimed that the San Jose, California-based software tech giant downplayed the potential threat of user experience design company Figma and hid from investors how effectively Adobe’s competing tool, XD, was gaining users by comparison.