Atrium Angels was started in 2021 by ISB alumni to back founders from the ISB ecosystem. The fund is sector-agnostic and focuses on writing early cheques, alongside access to mentorship and relevant networks.

Atrium Ventures was started in 2023. The fund backs early-stage companies across fintech, enterprise tech, and B2B.

Consumer Collective was started in 2025 by consumer entrepreneurs, operators, and family businesses. The fund focuses on supporting early-stage consumer brands, consumer technology companies, and consumer enablers.

Atrium Frontier Fund backs the next generation of frontier AI companies in the US, built by Indian-origin entrepreneurs at the pre-seed stage. The fund focuses on Applied Vertical AI, Agentic Workflows, Consumer AI, and Hard AI Infrastructure.