Alquist 3D is a Greeley, Colorado-based construction technology company that uses robotic 3D concrete printing to build homes, commercial buildings, and infrastructure. Founded in 2020 by Zachary Mannheimer, the company completed one of the first 3D-printed Habitat for Humanity homes in the U.S. and printed an ~8,000-square-foot addition to a Walmart in Athens, Tennessee - billed as the largest 3D-printed commercial structure in the country. In late 2025 it announced a landmark deal to print more than a dozen Walmart and retail buildings, positioning itself to commercialize 3D concrete printing at national scale.
Jon O'Bryan is the CEO and Co-founder of Atlas (YC W22), an AI-first customer support platform built to replace legacy tools like Zendesk and Intercom. A PhD physicist turned serial entrepreneur, Jon previously co-founded PadSplit - a co-living marketplace that housed 23,000 people across 18 U.S. cities - and Blanket Homes. At Atlas, he is on a mission to transform customer support from a cost center into a revenue driver, bringing together session recording, omnichannel ticketing, AI copilot, and customer timeline tools in a single ergonomic platform backed by Y Combinator and angel investors including Parker Conrad (Rippling), Jack Altman (Lattice), and Arash Ferdowsi (Dropbox).
The John Stewart Company (JSCo) is a San Francisco-based, full-service affordable and mixed-income housing organization. Founded in 1978 by John Stewart, it has grown into one of California's largest affordable housing managers, handling roughly 31,000 units across the state through integrated property management, development, construction, and financial services - with a parallel mission of delivering resident services and supportive housing for vulnerable populations.