the.com/stakeholder

means A person or group with a genuine interest or investment in something, affected by its outcomes and often able to influence them.

from Literally someone who holds the 'stake' — the money or property wagered in a bet — while others settle the contest, remaining neutral until a winner is declared. The gambling sense is recorded from the 18th century. From there it drifted into law and business for anyone holding an interest in an agreement, and by the 20th century into management-speak for anyone with a claim, however small, on a project's success or failure.