Arch Venture Partners

The company forms companies based on technologies that can affect people's lives, takes a long-term approach, adjusts investment size, and uses its partner network to support company formation and growth.

Dr. George Scangos was founding president and CEO of Vir Biotechnology from 2016 to 2023 and remains a board member. Under his leadership, Vir delivered therapies for Ebola and COVID-19 to millions of patients and built a pipeline across five therapeutic areas.

Dr. John Maraganore was founding CEO and a director of Alnylam Pharmaceuticals, Inc. from 2002 to 2021, leading the company from RNA interference research through global approval and commercialization of four RNAi medicines: ONPATTRO, GIVLAARI, OXLUMO, and Leqvio.

Olivia Zetter is a strategic advisor and venture partner at ARCH Venture Partners. She focuses on new company creation and advises on strategic portfolio matters, drawing on experience in emerging technology and national security across the public and private sectors.

Robert Nelsen is a co-founder and managing director of ARCH Venture Partners. He has helped create, source, finance, and develop more than 150 companies, including over 50 early-stage investments that reached valuations exceeding $1 billion.

ARCH Venture Partners provides seed / early stage venture capital for technology firms in information technology, life sciences, and physical sciences

ARCH Venture Partners last updated its Privacy Policy on December 13, 2018. The company operates the site, which provides information about the company.

Arch Venture Partners has offices in Chicago, Seattle, and San Francisco.

California-based Oratomic raises $475 million, while UK-based Universal Quantum raises more than $100 million in Series A funding. Oratomic’s Series B, co-led by ARCH Venture Partners, Spark Capital, Khosla Ventures, Index Ventures, General Catalyst and Bezos Expeditions, brings its total funding to $775 million and its valuation to $5.5 billion. Universal Quantum develops modular trapped-ion systems and plans to use its funding to advance commercialization and support expansion in Singapore, the United States and Japan.

Oct 2026 · SiliconANGLENews article

Quantum-computing startup Oratomic raises $475 million in a Series B, bringing its valuation to $5.4 billion. The financing brings the company's total funding to $775 million.

Oct 2026 · Wall Street JournalNews article

Oratomic raises $300 million in a Series A to develop a utility-scale quantum computer using lasers to trap individual atoms. The round is co-led by ARCH Venture Partners, Spark Capital, and Khosla Ventures, with participation from Bezos Expeditions, Index Ventures, General Catalyst, Lowercarbon Capital, Bain Capital, and others. The company says its error-correction approach could enable a useful system with 10,000 to 20,000 qubits, and it reports experimentally demonstrating the core components at a smaller scale.

Jul 2026 · TechCrunchNews article