Sharer

noun

1. One who shares, divides, or apportions.
2. One who shares with others.
3. A shareholder or proprietor; a stockholder.
4. One who participates in anything with another or others; one who enjoys or suffers in common with another or others; a partaker.
5. One who shares; a participator; a partaker; also, a divider; a distributer.