The Triangle Tweener Fund focuses on early-stage, high-tech startups in the Triangle area. It operates as a Rolling Fund, investing in companies that meet specific criteria: $1m ARR or 10 employees, headquartered in the Triangle, and not exceeding $80m ARR. The fund employs an index strategy, making quarterly investments in private companies that fit their "Tweener" definition.

The fund's portfolio includes notable companies such as Adwerx, Allstacks, and Pryon. Led by Scot Wingo and Robbie Allen, the Tweener Fund offers a unique approach to startup investing, leveraging the Triangle Tweener List to identify promising opportunities. Their investment philosophy centers on supporting and growing the local tech ecosystem while providing investors exposure to a diverse range of early-stage companies.