About Engine Ventures
Engine Ventures is a venture capital firm founded in 2017. It is primarily based out of Cambridge, United States. As of Oct 2026, Engine Ventures is an active investor, having invested in 61 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 Life Sciences and Environment Tech. Most recently it participated in the $***** Series C round of VEIR 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 19 people including 6 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 61 companies, one of which is a Unicorn. Their most notable investments are in WoHo and Emvolon.Their portfolio spans across United States, United Kingdom and France. They have invested in High Tech, Life Sciences, Environment Tech and 22 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 G
- Total Funding till date: $2B
- Employee Count: 902 as on Sep 30, 2026
- Investors: T. Rowe Price, GIC and 45 Others
- Latest Funding Round: Conventional Debt, Sep 21, 2026, $*****
- Highlight: Editors' Pick
2. 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)
- Valuation: $*****
- Stage: Series C
- Total Funding till date: $4B
- Employee Count: 1,124 as on Sep 30, 2026
- Investors: Temasek, DFJ Growth and 69 Others
- Latest Funding Round: Series C, Jul 30, 2026, $*****
- Highlight: Editors' Pick
3. 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: 61 as on Sep 30, 2026
- Investors: Fidelity Investments, Samsung Catalyst Fund and 21 Others
- Latest Funding Round: Series C, Feb 25, 2025, $*****
- Highlight: Acquired
4. Hyperlight
Developer of transmitter PICs, chiplets, and packaged modulators for optical networking. The company manufactures known-good-dies (KGD) on the TFLN Chiplet platform suitable for PAM/IMDD and coherent applications. It offers intensity modulation/direct detection (IMDD) PICs for pluggable transceivers and dual-polarization IQ (DPIQ) transmitter PICs for DCI and long-haul communications. Additionally, the company provides customized transmitter chiplets tailored for specific integration schemes and applications, along with packaged electro-optic amplitude, phase, and IQ modulators. The company's products cater to AI, Datacom, Telecom, test and measurement, quantum systems, and emerging applications. It also offers custom development partnerships and multi-project wafer (MPW) runs.
Key facts about Hyperlight
- Founded Year: 2018
- Location: Cambridge (United States)
- Valuation: $*****
- Stage: Series C
- Total Funding till date: $117M
- Employee Count: 92 as on Sep 30, 2026
- Investors: Foxconn Electronics, Summit Partners and 10 Others
- Latest Funding Round: Series C, Apr 02, 2026, $*****
- Highlight: Editors' Pick
5. 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: 129 as on Sep 30, 2026
- Investors: RA Capital Management, Gates and 16 Others
- Latest Funding Round: Series D, Aug 27, 2025, $*****
- Highlight: Editors' Pick
Engine Ventures' Year-on-Year Investment Trends
Engine Ventures has invested in 61 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 Oct 2026, it has made 12 investments in this year. Its most recent first time investment was in Corepowermagnetics and most recent follow-on round was in VEIR.Year | No. of Investments | ||
|---|---|---|---|
1st Round | Follow-on | Total | |
2026 (YTD) | 6 | 6 | 12 |
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, 13 investments in Series A stage with an average round size of $34.4M 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 | 13 |
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 | 60 |
Note: We have considered here, only first round of investments
Engine Ventures' Investments by Geography
Engine Ventures has made most investments in United States (47), followed by United Kingdom where it has made 2 investments.Country | No. of Investments |
|---|---|
United States | 47 |
United Kingdom | 2 |
France | 1 |
Note: We have considered here, only first round of investments
Engine Ventures' recent investments
Engine Ventures has made 12 investments in 2026 so far. VEIR and Corepowermagnetics 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 |
|---|---|---|---|---|---|
Oct 08, 2026 | United States | Series C | 6240 | ||
Aug 25, 2026 | United States | Series A | 1913 | [+3] | |
Aug 12, 2026 | United States | Series G | 2220 | [+17] | |
Jun 22, 2026 | United Kingdom | Series A | 2968 | [+1] | |
Apr 17, 2026 | United Kingdom | Series B | 7938 | [+2] |
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 G | m{osw{u |
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 | 2007 |
Team profile of Engine Ventures
Engine Ventures has a team of 19 members including 6 Partners, 2 Venture Partners and 3 Principals located in United States. 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 | Cambridge | - | ||
Partner | - | - | ||
Partner | Boston | - | ||
Venture Partner | - | - | ||
Venture Partner | Cambridge | - | ||
Principal | Boston | - | ||
Principal | Cambridge | - | ||
Principal | New York City | - |
Co-investors of Engine Ventures
Over the past 9 years, 408 investors have co-invested in Engine Ventures's portfolio companies. This includes funds and angels.
- Invested before Engine Ventures: National Science Foundation, OSTI and 83 others have invested in rounds before Engine Ventures. There are 5 companies where National Science Foundation has invested before Engine Ventures and 5 companies where OSTI has invested before Engine Ventures.
- Top Co-investors of Engine Ventures: 138 investors entered a company along with Engine Ventures. These include investors like Blindspot Ventures (4 companies).
- Invested after Engine Ventures: A total of 185 investors have invested in Engine Ventures's portfolio after their investments. Top Investors include OSTI (8 companies), National Science Foundation (4 companies) and Safar Partners (3 companies).
Recent News related to Engine Ventures
•
VEIR Raises $110 Million Series C for Superconducting Data-Center Power SystemsMarketbusinessnews•Oct 11, 2026•Matter Venture Partners, VEIR, Galvanize Climate Solutions, Vxi Capital and 6 others
•
CorePower Magnetics Raises $10.6M in FundingFinSMEs•Sep 17, 2026•Engine Ventures, Material Impact, Corepowermagnetics
•
Superlight Raises £15.9M to Boost Commercial EV Truck ManufacturingUKTN•Jun 23, 2026•2150.VC, Engine Ventures
•
•
Foundation Alloy Raises $22M in Series A Funding FinSMEs•Jun 16, 2026•El Cap, AFF, Engine Ventures, Overlap Holdings and 5 others
•
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
•
Blue Energy Raises $380 Million to Manufacture Modular Nuclear Power Plants at ShipyardsStartup Log•Apr 22, 2026•Blue Energy, Engine Ventures, Vxi Capital
•
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
•
Terrestrial Bio Raises $50M in Series C FundingFinSMEs•Mar 26, 2026•Engine Ventures, Global Health Investment, SiteGround, RA Capital Management and 1 other
•
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
