contributor
noun [ C ]
uk/kənˈtrɪbjʊtər/ usone of the reasons why something happens:
contributor to sth Good management has been a big contributor to the company's success.
Aviation is considered to be the fastest growing contributor to global warming.
a person or company that pays money into a pension fund, medical insurance policy, etc.:
The contributors and the pension fund trustees have been haggling over the details.
a person or company that gives money or support to help another person, company, or organization achieve its goal:
contributor to sth He is one of Tennessee's biggest contributors to Republican causes.