Carmichael Roberts

Background

Carmichael Roberts is Managing Partner of Breakthrough Energy Ventures (BEV) and Co-Founder and Managing Partner of Material Impact, making him one of the most prominent venture capitalists focused on climate tech and materials science ¹². He co-leads the investment committee at BEV, the climate-focused fund founded by Bill Gates that has raised more than $2 billion and invested in over 120 companies developing technologies to reduce greenhouse gas emissions ³.

Roberts grew up in Queens and Brooklyn, New York, and was a first-generation college student ⁴. He earned his B.S. and Ph.D. in organic chemistry from Duke University and completed a National Science Foundation postdoctoral fellowship at Harvard University in the Departments of Chemistry and Chemical Biology, working in George Whitesides’ lab ¹⁴. He later earned an MBA from MIT Sloan School of Management ¹.

Before becoming an investor, Roberts held roles in business development at GelTex Pharmaceuticals (acquired by Genzyme for $1.3 billion) and in new product and business development at Dow Chemical (formerly Union Carbide Corporation) ¹. He then became a serial entrepreneur, co-founding several ventures including Arsenal Medical (where he served as President and CEO), Surface Logix, Nano-Terra, and Ancora, typically licensing university technology and commercializing it through partnerships with Fortune 500 companies ¹⁵.

Roberts served as a General Partner at North Bridge Venture Partners from 2007 to 2017, where he carved out a niche as the firm’s “materials investor,” financing and building early-stage companies applying chemistry, materials science, and materials engineering ⁶. In 2016, he co-founded Material Impact with Adam Sharkawy, a materials science-focused venture firm that has grown to nearly $800 million in assets under management across three funds ($110M Fund I in 2018, $200M Fund II in 2020, and $352M Fund III in 2023) ²⁷⁸.

Beyond investing, Roberts serves as Vice Chairman of the Duke University Board of Trustees (elected 2013) and was appointed Chairman of the Board of the Consumer Technology Association in 2022 ¹⁹. He was named MIT Technology Review’s top 100 young entrepreneurs in 1999, ranked #1 on the Boston Globe’s Tech Power Players list in 2022, and received the Edison Achievement Award ¹¹⁰.

Stated Thesis

Roberts has publicly described his investment focus as centered on materials science innovation as the key driver of transformative technology. Material Impact’s stated approach is to invest in “first-of-their-kind innovations” that make the world “cleaner, more productive, and healthier,” targeting what the firm calls “Maslowian needs” including water scarcity, food supply chains, sustainable manufacturing, mobility, energy, and underrepresented healthcare ²¹¹.

At Breakthrough Energy Ventures, Roberts has described the mission as addressing climate change through technology commercialization, emphasizing that BEV’s approach differs from typical VC because of the depth of in-house scientific expertise ³.

Roberts and co-founder Adam Sharkawy have stated their core thesis as: “You can trace almost any major disruptive innovation in any market or industry back to an underlying innovation in material science” ¹¹. Material Impact begins with checks under $1 million at the inception stage and scales to $5 million or more in syndicated rounds ¹¹.

Inferred Thesis

Based on 34 verified Material Impact portfolio companies ² and Roberts’ role co-leading the BEV investment committee (123 investments as of early 2026) ¹², the following patterns emerge. Note: BEV investments are made by the investment committee Roberts co-leads, not by Roberts individually, so BEV portfolio data reflects committee-level decisions.

Material Impact Portfolio Sector Breakdown (34 companies): - Sustainable manufacturing: 8 of 34 (24%) — 6K, Actnano, Amperesand, DetraPel, Foundation Alloy, Fusion Coolant Systems, Gen Phoenix, Koloma - Biomanufacturing and sustainable products: 7 of 34 (21%) — AgZen, Debut, GALY, Huue, Mattiq, Nohbo, Werewool - Transportation and mobility: 5 of 34 (15%) — Jump Aero, LynQ, Maglev Aero, Orbion Space Technology, Nauticus Robotics - Robotics and AI: 4 of 34 (12%) — Fleet Robotics, Oxipital AI, Sonera Magnetics, Nauticus Robotics - Food and water: 4 of 34 (12%) — Infinite Cooling, Ripple Foods, SOURCE, Talus - Data storage and security: 2 of 34 (6%) — Datacule, Folio Photonics - Underrepresented healthcare: 2 of 34 (6%) — BloomerTech, NextGen Jane - Other (earlier investments): 2 of 34 (6%) — Still Bright, Tierra Biosciences

Stage focus: Material Impact is primarily a first-check, inception-stage investor. The firm licenses university technology and helps build companies from initial formation, with initial checks under $1 million scaling to $5M+ in later rounds ¹¹. Through BEV, Roberts participates in larger rounds from Series A through growth (BEV’s typical range is $500K to $50M) ⁵.

University spinout pattern: A striking majority of Material Impact portfolio companies originate from university labs. Of 34 companies, identifiable university origins include MIT (6), Harvard (4), UC Berkeley (3), Northwestern (2), Duke, UCI, Columbia, Michigan Tech, Purdue, NYU, Case Western Reserve, Arizona State, Caltech, Nanyang Tech, and University of Michigan ². This strongly reflects Roberts’ stated model of licensing university research.

Geographic concentration: Material Impact is based in Boston, and the portfolio skews toward companies originating from East Coast research universities (MIT, Harvard, Columbia) with significant West Coast representation (UC Berkeley, UCI, Caltech) ².

Co-investor patterns: Through BEV, Roberts frequently co-invests alongside Khosla Ventures, Lowercarbon Capital, Emerson Collective, and Tiger Global ¹³. Material Impact’s co-investors are less publicly documented.

Notable gap vs. stated thesis: While Material Impact claims to invest in “underrepresented healthcare,” only 2 of 34 companies (6%) fall in this category, suggesting it is a minor focus despite being named as a core pillar ².

Portfolio

The table below covers Roberts’ personal investments and Material Impact portfolio. BEV investments where Roberts co-leads the investment committee are noted separately. This represents approximately 34 of Material Impact’s 34 known portfolio companies and a selection of notable BEV investments.

Material Impact Portfolio

Earlier Investments (Pre-Material Impact)

Notable BEV Investments (Roberts co-leads investment committee)

Note: Many Material Impact portfolio entries use approximate years (~) based on fund vintage and company stage, as exact initial investment dates are not publicly disclosed. Companies listed under Fund I (~2018), Fund II (~2020), or Fund III (~2023) based on available information.

In Their Own Words

“I am a capitalist, but I’m an entrepreneurial capitalist. We create products and businesses that do good, but they also create jobs, and they help drive the economy.” — Carmichael Roberts, Duke Centennial interview, June 2024 ⁴.

“That’s my life’s calling. And so this I’m going to do for as long as I’m standing there breathing.” — Carmichael Roberts, on climate tech investing, Boston Globe, 2022 ³.

“It takes a while for the planet to cool down. It’s not like a light switch that you turn and flip off… That’s the harsh reality and the motivation — that we are running out of time.” — Carmichael Roberts, interview, 2022 ³.

“I don’t think there’s another firm in history — I can’t think of one and I’m pretty good as a historian in venture — to have this much technical horsepower inside the firm.” — Carmichael Roberts, on BEV’s team of in-house scientists, Boston Globe, 2023 ³.

“Like Fund I and Fund II, Fund III will focus on companies that have the collective mission of keeping the world healthy, safe, fed, warm, powered, and secured.” — Carmichael Roberts, Material Impact Fund III announcement, November 2023 ⁷.

“You can trace almost any major disruptive innovation in any market or industry back to an underlying innovation in material science.” — Carmichael Roberts and Adam Sharkawy, AgFunderNews interview, 2023 ¹¹.

“CFS is advancing fusion at a pace and scale that can turn this future into reality — providing a unique opportunity to shape the energy landscape, especially as AI and data centers are driving unprecedented demand.” — Carmichael Roberts, Commonwealth Fusion Systems Series B2 announcement, August 2025 ¹³.

“Cooling is already a significant part of our global energy consumption and is expected to eventually surpass heating demand. Blue Frontier’s innovation is important because it can provide cooling with higher efficiency but also improved flexibility — reducing overall load and better utilizing renewable energy.” — Carmichael Roberts, Blue Frontier Series A announcement, August 2022 ¹⁸.

“Over the last half-dozen years, SOURCE has been building a tightly interconnected set of global solutions that have the power to make potable water poverty a thing of the past. As SOURCE continues to execute and grow, we believe the company will have a generational impact.” — Carmichael Roberts, SOURCE Global $130M funding announcement, 2022 ²⁰.

“There is a new standard emerging for high performance companies, where no trade-offs exist between positive social and environmental impact and exceptional business performance. Source Global, PBC exemplifies this new corporate standard and as such, we are proud to back the re-incorporation as a Public Benefit Corporation.” — Carmichael Roberts, SOURCE Global PBC announcement, September 2020 ²¹.

What Founders Say

No independently sourced founder testimonials found. Roberts’ long-time collaborator George Whitesides, the Harvard chemistry professor in whose lab Roberts conducted his postdoctoral work, has said of him: “Beyond scientific and business skills, it’s his outstanding human qualities — enthusiasm, humor, courage and caring — that guarantee success” ¹. While this is a mentor’s endorsement rather than a portfolio founder testimonial, it reflects Roberts’ reputation within the scientific community from which many of his portfolio companies originate.

Sources