Participated · Series B · Dec 2025

Quilt develops sleek, connected heat pumps that can receive over-the-air software and firmware updates, allowing in-field performance improvements such as a recent 20% efficiency boost. Drawing on a team with deep Nest experience, the company takes a design- and software-first approach to challenge incumbent HVAC manufacturers. As of its Series B, Quilt has installed nearly 1,000 units across 16 U.S. states and five Canadian provinces, demonstrating early adoption of its product. The latest funding will be used to expand manufacturing capacity, sales operations, and geographic reach. Co-founder and CEO Paul Lambert leads the company. With the new capital, Quilt has raised at least $53 million to date, including a $33 million Series A announced in April 2024 and the recent $20 million Series B.

Participated · Series A · Aug 2024

Amulet builds portable sensors that provide rapid, on-site molecular detection for food allergens, toxins, and other environmental contaminants through a consumer wearable (Allergy Amulet) and a commercial detection platform (Amulet Scientific). The company plans to scale its team, expand its detection portfolio, and execute a full product launch to serve a growing waitlist. Since its 2020 seed round, Amulet has secured grant funding from the National Institutes of Health and the U.S. Department of Agriculture. Recent strategic hires include Michelle Wu (Head of Product) and Barkley Jenny (VP of Product) to support commercialization and product development. Amulet also recently became a benefit corporation, reflecting its mission-driven approach to improving food safety for individuals and businesses. The technology targets both consumer needs (people managing food allergies and intolerances) and commercial customers (restaurants, suppliers, and manufacturers) to reduce allergen exposure, contamination-related recalls, and associated health impacts. Allergy Amulet builds a consumer food-allergen detection platform centered on a thumb-sized reader (the "Amulet") paired with a disposable sampler. The device pairs molecularly imprinted polymer (MIP) technology with an electrochemical system to detect common allergenic ingredients in seconds. Its sleek, portable design supports everyday carry (keychain, necklace, wristband) and an optional mobile app to store and share results. Allergy Amulet closed additional Seed funding that brought the round to $4.1 million and previously raised an initial Seed led by a joint venture between Microsoft and the Green Bay Packers. The new capital will be used to accelerate manufacturing, expand product offerings to cover more allergens, grow the team, and educate consumers. The company positions the Amulet as an additional tool for individuals, parents, and businesses to better manage food allergies and reduce reliance on strict avoidance and emergency treatment. Allergy Amulet has developed a small, fast consumer food allergen sensor consisting of a USB-sized reader and disposable test strips housing proprietary sensor chips. The patented, portable technology is designed to fit on a keychain, necklace, wristband, or in a pocket and the company’s case also accommodates epinephrine and antihistamines. The company holds one issued U.S. patent with multiple applications and reports a waitlist with thousands of individuals signed up for an early beta release. Allergy Amulet plans to use new funding to manufacture beta units, launch pre-orders, expand product offerings to cover more allergens, grow its team, add additional restaurant and company partners, and educate consumers about food allergen management tools. The company is led by Co-founder and CEO Abigail Barnes and Co-founder and Scientific Advisor Dr. Joseph BelBruno. Pre-sales were slated for Fall 2020 with a broader launch planned for Fall 2021. Allergy Amulet develops a rapid, portable, point-of-consumption food allergen detection device that connects to a patent-pending disposable test strip. The device enables mobile measurements to help individuals avoid ingesting target allergens. It can be configured as a wearable (for example, a necklace) or integrated into everyday products (for example, an EpiPen). Led by CEO Abigail Barnes and based in Madison, WI, the company plans to begin beta testing of its prototype. Allergy Amulet raised $1.1M in seed funding to grow the team and accelerate product development. Investors in the round include Colle Capital, Bulldog Innovation Group, Foley Ventures, Gopher Angels, Mendota Venture Capital and the Wisconsin Medical Society Foundation.

Participated · Series A · Aug 2024

Amulet develops portable, on-site molecular detection sensors for identifying food allergens and environmental contaminants. The company offers a consumer-facing product under the Allergy Amulet™ brand, including a signature wearable for testing food on the go, and a commercial detection platform under Amulet Scientific™ for restaurants, suppliers, and manufacturers. Led by CEO and Founder Abigail Barnes and based in Madison, WI, Amulet positions its technology for both individual users and food-industry customers. The company plans to scale its team, expand its detection portfolio, and execute a full product launch to serve a growing waitlist. Its current financial update is a $6M Series A funding round announced in December 2024. No operating metrics (revenue or users) were disclosed in the article.

Participated · Series A · Apr 2024

Windfall Bio sells methane-eating microbes to industries that produce large levels of methane—agriculture, oil and gas, and landfills—converting emissions into fertilizer that can be used or sold. The Menlo Park–based startup emerged from stealth in March 2023 and has seen strong inbound demand across continents and verticals. Windfall positions its solution as a low-cost, near-term methane-reduction technology that can generate revenue for customers rather than only delivering carbon credits. The company is focused on expanding commercialization efforts to meet this demand. Leadership argues methane mitigation offers a faster climate ROI than CO2-focused approaches because methane is shorter-lived and can be repurposed as an energy/fertilizer product. Windfall also notes a relatively sparse competitive landscape, which it believes gives it an early advantage. Windfall Bio is developing the first solution to capture dilute methane emissions and convert them into a living organic fertilizer using proprietary, nature‑based enrichment of methane‑eating microbes (MEMs). Its process enriches soil‑derived MEMs that consume methane and capture atmospheric nitrogen to produce fertilizer with improved bioavailability, reduced runoff, and lower downstream emissions versus synthetic ammonia. The company provides microbes, digestors, and associated services for on‑site methane capture and transformation, allowing farmers to apply the fertilizer on‑site or sell it to local organic farms. Windfall says the product will be available at the same price as current organic fertilizers and aims to improve soil health while creating new revenue streams for operators. Windfall Bio closed a $9 million seed round and will use the capital to begin pilot deployments on farms and accelerate R&D. Founded in 2022 and based in Menlo Park, CA, the company is backed by Mayfield, UNTITLED, B37 Ventures, Baruch Future Ventures, Breakthrough Energy Ventures, Bessemer Venture Partners, and Cavallo Ventures.

Participated · Seed · Feb 2022

Rubi Laboratories develops an enzyme-driven platform that converts captured carbon dioxide into cellulose suitable for lyocell and viscose. The process uses a cascade of engineered enzymes in aqueous reactors sized to fit inside shipping-container modules, producing white cellulose within minutes as CO2 is added. Rubi has used AI and machine learning to improve enzyme efficacy and stability and plans to move toward continuous production. The company is building a demonstration-scale system intended to produce tens of tons of material and intends to supply apparel and other industries that use cellulose. Rubi has tested its material with 15 pilot partners, including H&M, Patagonia, and Walmart, and has booked more than $60 million in non-binding off-take agreements with a couple of partners. Leadership includes co-founder and CEO Neeka Mashouf, who founded the company with her twin sister Leila.