About Engine Ventures
Engine Ventures is a venture capital firm founded in 2017. It is primarily based out of Cambridge, United States. As of Apr 2026, Engine Ventures is an active investor, having invested in 59 companies, with 6 new investments in the last 12 months. It primarily invests in Seed round in United States based startups. Its investments are spread across a wide range of sectors from High Tech to Environment Tech and Life Sciences. Most recently it participated in the $***** Series B round of Blue Energy Overall, Engine Ventures portfolio has seen 1 unicorn and 1 acquisition, namely Form Energy and Celestial AI. A lot of funds co-invest with Engine Ventures, with names like Blindspot Ventures sharing a substantial percentage of its portfolio. Engine Ventures has team of 27 people including 7 partners.Key Metrics
Team Members
Portfolio Count
Portfolio Sectors
Portfolio Locations
Rounds of Entry
Seed, Series A & 4 more
Portfolio Acquisitions
Portfolio Unicorns
Deals in last 12 months
Engine Ventures' List of Top Investments
Engine Ventures has a portfolio of 59 companies, one of which is a Unicorn. Their most notable investments are in Axiomatic AI and WoHo.Their portfolio spans across United States, United Kingdom and France. They have invested in High Tech, Environment Tech, Life Sciences and 21 other sectors, across stages such as Seed, Series A and 4 more. Here is the list of top investments by Engine Ventures:_1531912477249.png?format=webp&height=120&width=120){kind=logo}
1. Form Energy
Clean energy technology platform developing long-duration iron-air battery systems. It develops advanced battery solutions capable of storing electricity for multiple days, helping balance energy supply and demand during periods of high stress or renewable energy intermittency. It is designed to support the transition to a cleaner and more resilient electric grid by enabling greater integration of renewable energy sources such as wind and solar. Its technology centers on cost-effective, scalable battery systems built for long-duration storage applications, addressing critical gaps in traditional short-duration energy storage solutions.
Key facts about Form Energy
- Founded Year: 2017
- Location: Somerville (United States)
- Valuation: $*****
- Stage: Series F
- Total Funding till date: $1.22B
- Employee Count: 849 as on May 31, 2026
- Investors: GIC, NGP Energy Technology Partners and 37 Others
- Latest Funding Round: Series F, Jan 10, 2025, $*****
- Highlight: Editors' Pick
2. Celestial AI
Developer of optical interconnect technology for artificial intelligence infrastructure systems. The company’s technology aims to improve artificial intelligence system performance through optical interconnectivity. It focuses on enabling efficient scaling of artificial intelligence to advance progress in various fields. The company’s platform is designed for integration into next-generation artificial intelligence systems.
Key facts about Celestial AI
- Founded Year: 2020
- Location: Santa Clara (United States)
- Last Known Valuation: $*****
- Stage: Acquired
- Total Funding till date: $589M
- Employee Count: 68 as on May 31, 2026
- Investors: Fidelity Investments, Samsung Catalyst Fund and 21 Others
- Latest Funding Round: Series C, Feb 25, 2025, $*****
- Highlight: Acquired
3. CFS
Provider of tokamak nuclear fusion reactors. It uses rare-earth barium copper oxide in high-field superconducting magnets for the working of compact fusion reactors.
Key facts about CFS
- Founded Year: 2018
- Location: Cambridge (United States)
- Stage: Series B
- Total Funding till date: $2.93B
- Employee Count: 1,081 as on May 31, 2026
- Investors: Mitsui, Morgan Stanley and 68 Others
- Latest Funding Round: Series B, Aug 28, 2025, $*****
- Highlight: Editors' Pick
4. Vaxess
Developer of novel vaccine formulations using a silk stabilization platform. Technology includes extracting fibroin from silk in which biological compounds are encapsulated to provide heat stability. It is also developing product formats that enable novel routes of administration like microneedles for transdermal applications. It has developed MIMIX therapies that help in treating cancers such as skin cancers, breast cancer, and infectious diseases.
Key facts about Vaxess
- Founded Year: 2011
- Location: Cambridge (United States)
- Stage: Series D
- Total Funding till date: $117M
- Employee Count: 72 as on Mar 31, 2026
- Investors: RA Capital Management, MIT Startup Exchange and 16 Others
- Latest Funding Round: Series D, Aug 27, 2025, $*****
- Highlight: Editors' Pick
5. Cellino
Developer of autologous cell therapies. The company has developed an AI-guided laser editing platform, single-cell laser processing, and robotics to generate autologous induced pluripotent stem cells for regenerative medicines for diseases like Parkinson’s, diabetes, and heart disease.
Key facts about Cellino
- Founded Year: 2017
- Location: Cambridge (United States)
- Stage: Series A
- Total Funding till date: $125M
- Employee Count: 109 as on May 31, 2026
- Investors: Khosla Ventures, Humboldt Fund and 7 Others
- Latest Funding Round: Series A, Sep 18, 2024, $*****
- Highlight: Editors' Pick
Engine Ventures' Year-on-Year Investment Trends
Engine Ventures has invested in 59 companies over the last 9 years, with an average of 7 new investments annually in the last 5 years. In 2025, it made 11 investments, while as of Apr 2026, it has made 8 investments in this year. Its most recent first time investment was in Hyperlight and most recent follow-on round was in Blue Energy.Year | No. of Investments | ||
|---|---|---|---|
1st Round | Follow-on | Total | |
2026 (YTD) | 4 | 4 | 8 |
2025 | 7 | 4 | 11 |
2024 | 14 | 2 | 16 |
2023 | 2 | 2 | 4 |
2022 | 6 | 4 | 10 |
2021 | 4 | 5 | 9 |
2020 | 3 | 2 | 5 |
2019 | 4 | 1 | 5 |
2018 | 0 | 0 | 0 |
2017 | 4 | 0 | 4 |
Engine Ventures' Investments by Stage
Engine Ventures has made 29 investments in Seed stage with an average round size of $6.32M, 11 investments in Series A stage with an average round size of $37.5M and 3 investments in Series B stage with an average round size of $31.2M.Stage of entry | No. of Investments |
|---|---|
Seed | 29 |
Series A | 11 |
Series B | 3 |
Series C | 3 |
Series D | 1 |
Others | 1 |
Note: We have considered here, only first round of investments
Engine Ventures' Investments by Sector
Engine Ventures has a diverse portfolio, with companies operating in the High Tech, Sustainability Tech, Enterprise Applications, Environment Tech and Energy Tech. Notably, it has invested in 48 Tech companies, 47 Enterprise (B2B) companies, 21 Software companies and at least 16 companies focusing on Tech hardware.Sector | No. of Investments |
|---|---|
High Tech | 21 |
Sustainability Tech | 12 |
Enterprise Applications | 10 |
Environment Tech | 10 |
Energy Tech | 9 |
Others | 59 |
Note: We have considered here, only first round of investments
Engine Ventures' Investments by Geography
Engine Ventures has made most investments in United States (45), followed by United Kingdom where it has made 2 investments.Country | No. of Investments |
|---|---|
United States | 45 |
United Kingdom | 2 |
France | 1 |
Note: We have considered here, only first round of investments
Engine Ventures' recent investments
Engine Ventures has made 8 investments in 2026 so far. Blue Energy and Foundation Alloy are the latest among them.Here are the most recent investments by Engine Ventures:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Apr 17, 2026 | United Kingdom | Series B | 6465 | [+2] | |
Apr 06, 2026 | United States | Series A | 1109 | [+7] | |
Apr 02, 2026 | United States | Series C | 6409 | [+9] | |
Mar 16, 2026 | United States | Series A | 4909 | [+2] | |
Mar 09, 2026 | United States | Seed | 5139 | [+4] |
Unicorns in Engine Ventures' Portfolio
Engine Ventures has 1 unicorn in its portfolio - Form Energy. The most recent unicorn in their portfolio is Form Energy which became a unicorn in 2022, 2 years before Engine Ventures first invested in it.Here is a list of unicorns in Engine Ventures' portfolio:
Tracxn Score | Company | Short Description | Founded year | Sector | Location | Company Stage | First Investment/ Acquisition Details |
|---|---|---|---|---|---|---|---|
71 | Clean energy technology platform developing long-duration iron-air battery systems | 2017 | Somerville | Series F | dhthiqq |
Acquired companies in Engine Ventures' Portfolio
1 company from Engine Ventures' portfolio has been acquired. The most recent acquisition was Celestial AI in Dec 2025 by Marvell for $*****.Here are Engine Ventures' portfolio companies that got acquired most recently:
Company | Acquisition Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Dec 02, 2025 | Mar 27, 2024 | Series C | 1250 |
Team profile of Engine Ventures
Engine Ventures has a team of 27 members including 7 Partners, 2 Venture Partners and 3 Principals located in United States and Canada. Engine Ventures' team sits on the board of 5 companies.Here is a list of top team members in Engine Ventures:
Name | Designation | Location | Board Memberships | Contact Details |
|---|---|---|---|---|
Partner | Lexington | |||
Partner | - | |||
Partner | Cambridge | Form Energy, Via Separations and 1 more | ||
Partner | Canada | - | ||
Partner | Cambridge | - | ||
Partner | - | - | ||
Partner | Boston | - | ||
Venture Partner | - | - | ||
Venture Partner | Cambridge | - | ||
Principal | Boston | - | ||
Principal | Cambridge | - |
Co-investors of Engine Ventures
Over the past 9 years, 386 investors have co-invested in Engine Ventures's portfolio companies. This includes funds and angels.
- Invested before Engine Ventures: National Science Foundation, Engine and 79 others have invested in rounds before Engine Ventures. There are 5 companies where National Science Foundation has invested before Engine Ventures and 4 companies where Engine has invested before Engine Ventures.
- Top Co-investors of Engine Ventures: 134 investors entered a company along with Engine Ventures. These include investors like Blindspot Ventures (4 companies).
- Invested after Engine Ventures: A total of 171 investors have invested in Engine Ventures's portfolio after their investments. Top Investors include OSTI (8 companies), Safar Partners (3 companies) and Fine Structure Ventures (3 companies).
Recent News related to Engine Ventures
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Foundation Alloy Raises $22M in Series A Funding FinSMEs•Jun 16, 2026•El Cap, AFF, Engine Ventures, Overlap Holdings and 5 others
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Hark has raised $700 Million in new Series A Fundingintelligence360•Jun 02, 2026•Align Ventures, Parkway VC, Brookfield Asset Management, ARK Investment Management and 12 others
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SAF start-up Sora Fuel raises USD 14.6m to build pilot production plantRenewables Now•Apr 08, 2026•Sora Fuel, Inspired Capital, Spero Ventures, Wireframe Ventures and 1 other
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Terrestrial Bio Raises $50M in Series C FundingFinSMEs•Mar 26, 2026•Engine Ventures, Global Health Investment, SiteGround, RA Capital Management and 1 other
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Microneedle vaccine patch company Terrestrial Bio raises $50M for GLP-1 deliveryEndpoints•Mar 25, 2026•Vaxess, Engine Ventures, Global Health Investment, SiteGround and 1 other
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DG Matrix Closes $60 Million Series A to Scale Next-Generation Power Infrastructure for AI and Electrificationintelligence360•Mar 11, 2026•ABB, MCJ, Engine Ventures, Sabanc Climate Tech and 4 others
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Axiomatic AI Raises $18 Million to Advance Verified Engineering IntelligenceVentureburn•Mar 10, 2026•Axiomatic AI, Engine Ventures, Big Sur Ventures, Propagator Ventures and 5 others
