# Series A energy investors (2026 list)

> 452 series A energy investors, 90% active in the last 12 months. Led by Y Combinator, Techstars, National Science Foundation. Ranked by what they funded.

Source: https://millionrounds.com/lists/series-a-energy-investors (Millionrounds; every figure on the page links to its filing or article)

[Investor Lists](https://millionrounds.com/lists)

# Series A energy investors

Updated 7 November 2026

Firms we have watched take part in a Series A round raised by an energy company in the last two years. Both the stage and the sector are what they did, not what their website says.

[See all 452 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fseries-a-energy-investors)The top 25

**452** investors on the list *-6* this week

**8,877** cheques in 12 months *-9%* against the market

**$14M** median round they joined *+75%* against the market median

**90%** wrote a cheque in 12 months

**54%** have led a round

## The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (25)

- 1 [Y Combinator](https://millionrounds.com/fund/y-combinator) *Deploying now* Accelerator · United States **6,412** **$3M** median round **Oct 2026** last seen
- 2 [Techstars](https://millionrounds.com/fund/techstars) *Deploying now* VC firm · United States **2,989** **$1.2M** median round **Nov 2026** last seen
- 3 [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) *Deploying now* Government · United States **1,869** **$926K** median round **Sept 2026** last seen
- 4 [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) *Deploying now* VC firm · United States **1,661** **$27M** median round **Nov 2026** last seen
- 5 [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) *Deploying now* VC firm · United States **1,610** **$34M** median round **Oct 2026** last seen
- 6 [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) *Deploying now* VC firm · United States **1,598** **$12M** median round **Nov 2026** last seen
- 7 [Plug and Play](https://millionrounds.com/fund/plug-and-play) *Deploying now* Accelerator · United States **1,561** **$5M** median round **Nov 2026** last seen
- 8 [General Catalyst](https://millionrounds.com/fund/general-catalyst) *Deploying now* VC firm · United States **1,387** **$27M** median round **Nov 2026** last seen
- 9 [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) *Deploying now* VC firm · United States **1,341** **$35M** median round **Nov 2026** last seen
- 10 [Bpifrance](https://millionrounds.com/fund/bpifrance) *Deploying now* Government · France **1,151** **$4.5M** median round **Oct 2026** last seen
- 11 [Founders Fund](https://millionrounds.com/fund/founders-fund) *Deploying now* VC firm · United States **1,122** **$15M** median round **Oct 2026** last seen
- 12 [Bessemer Venture Partners](https://millionrounds.com/fund/bessemer-venture-partners) *Deploying now* VC firm · United States **1,038** **$30M** median round **Nov 2026** last seen
- 13 [Index Ventures](https://millionrounds.com/fund/index-ventures) *Deploying now* VC firm · United Kingdom **1,027** **$31M** median round **Nov 2026** last seen
- 14 [MassChallenge](https://millionrounds.com/fund/masschallenge) *Deploying now* Accelerator · United States **984** **$1.8M** median round **Sept 2026** last seen
- 15 [SOSV](https://millionrounds.com/fund/sosv) *Deploying now* VC firm · United States **951** **$2.5M** median round **Nov 2026** last seen
- 16 [Google Ventures](https://millionrounds.com/fund/gv) *Deploying now* Corporate VC · United States **884** **$38M** median round **Oct 2026** last seen
- 17 [EIC Accelerator](https://millionrounds.com/fund/eic-accelerator) *Deploying now* Government · European Union **875** **$4.3M** median round **Oct 2026** last seen
- 18 [FJ Labs](https://millionrounds.com/fund/fj-labs) *Deploying now* VC firm · United States **849** **$11M** median round **Oct 2026** last seen
- 19 [BoxGroup](https://millionrounds.com/fund/boxgroup) *Deploying now* VC firm · United States **773** **$18M** median round **Nov 2026** last seen
- 20 [Salesforce Ventures](https://millionrounds.com/fund/salesforce-ventures) *Deploying now* Corporate VC · United States **649** **$26M** median round **Nov 2026** last seen
- 21 [Venrock](https://millionrounds.com/fund/venrock) *Deploying now* VC firm · United States **560** **$36M** median round **Oct 2026** last seen
- 22 [Mayfield Fund](https://millionrounds.com/fund/mayfield) *Deploying now* VC firm · United States **509** **$23M** median round **Oct 2026** last seen
- 23 [IDG Capital](https://millionrounds.com/fund/idg-capital) *Deploying now* Private equity · China **504** **$25M** median round **Oct 2026** last seen
- 24 [8VC](https://millionrounds.com/fund/8vc) *Deploying now* VC firm · United States **497** **$23M** median round **Oct 2026** last seen
- 25 [B Capital](https://millionrounds.com/fund/b-capital) *Deploying now* VC firm · United States **495** **$14M** median round **Oct 2026** last seen

**427 more on this list**

All 452 are in the app, with filters for stage, sector and market. A free account shows 10 per search, Pro up to 1,000.

[See the whole list *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fseries-a-energy-investors)

## The Newest Cheques

Rounds this list's investors joined most recently

- **6** Nov **[Fathom Therapeutics](https://millionrounds.com/company/fathom-therapeutics)** Round *With* [Sutter Hill Ventures](https://millionrounds.com/fund/sutter-hill-ventures)
- **6** Nov **[Vensum Power](https://millionrounds.com/company/vensum-power)** Series A · $10M *Led by* [Lifeline Ventures](https://millionrounds.com/fund/lifeline-ventures)
- **6** Nov **[Humble Robotics](https://millionrounds.com/company/humble-robotics)** Series A · $51M *Led by* [Obvious Ventures](https://millionrounds.com/fund/obvious-ventures)
- **6** Nov **[Ocient](https://millionrounds.com/company/ocient)** Series C · $100M *With* [In-Q-Tel](https://millionrounds.com/fund/iqt)
- **6** Nov **[Harbinger](https://millionrounds.com/company/harbinger)** Series D+ · $240M *Led by* [Capricorn Investment](https://millionrounds.com/fund/capricorn-investment-group)
- **5** Nov **[i14](https://millionrounds.com/company/i14)** Seed · $6.3M *With* [Virescent Ventures](https://millionrounds.com/fund/virescent-ventures)

## Stages This Year

5,637 rounds

- Venture **21%**
- Seed **19%**
- Series A **17%**
- Pre-seed **8%**
- Series B **8%**
- Other **27%**

## What They Backed

Sectors, last 12 months

- AI **2,122**
- Biotech **422**
- Healthcare **357**
- Energy **311**
- Fintech **306**
- Big Data & Analytics **288**

## Cheques by Quarter

Led Joined

2,525 Q1 25

2,524 Q2 25

2,642 Q3 25

2,790 Q4 25

2,807 Q1 26

2,441 Q2 26

2,038 Q3 26

544 Q4 26

The last bar is the quarter still running.

## Lists Like This

- [Seed AI investors 2,922](https://millionrounds.com/lists/seed-ai-investors)
- [Series A AI investors 2,490](https://millionrounds.com/lists/series-a-ai-investors)
- [Series B AI investors 1,557](https://millionrounds.com/lists/series-b-ai-investors)
- [Pre-seed AI investors 1,286](https://millionrounds.com/lists/pre-seed-ai-investors)
- [Growth AI investors 1,186](https://millionrounds.com/lists/growth-ai-investors)
- [Series A fintech investors 950](https://millionrounds.com/lists/series-a-fintech-investors)
- [Series C AI investors 930](https://millionrounds.com/lists/series-c-ai-investors)
- [Seed fintech investors 925](https://millionrounds.com/lists/seed-fintech-investors)
- [Series A biotech investors 650](https://millionrounds.com/lists/series-a-biotech-investors)

[All investor lists *→*](https://millionrounds.com/lists)

## Reading for founders in climate and energy

- Taming the Sun: Innovations to Harness Solar Energy and Power the Planet Varun Sivaram · 2018 4.06 from 510 ratings on Goodreads Climate and energy Innovation About the book How solar could spark a clean-energy transition through transformative innovation--creative financing, revolutionary technologies, and flexible energy systems. Solar energy, once a niche application for a limited market, has become the cheapest and fastest-growing power… On AmazonListen on Audible
- The Elements of Power: Gadgets, Guns, and the Struggle for a Sustainable Future in the Rare Metal Age David S. Abraham · 2015 4.06 from 264 ratings on Goodreads Climate and energy Company building About the book Our future hinges on a set of rare metals that few of us have even heard of. In this eye-opening book, a natural resource strategist reveals the critical importance of these transformative elements to our technological lifestyle and the consequences of our reliance upon them,… On AmazonListen on Audible
- Scale: The Universal Laws of Growth, Innovation, Sustainability, and the Pace of Life in Organisms, Cities, Economies, and Companies Geoffrey B. West · 2017 4.11 from 5,764 ratings on Goodreads Climate and energy Company building Innovation About the book The former head of the Sante Fe Institute, visionary physicist Geoffrey West is a pioneer in the field of complexity science, the science of emergent systems and networks. The term “complexity” can be misleading, however, because what makes West’s discoveries so beautiful is… On AmazonListen on Audible
- Energy: A Beginner's Guide Vaclav Smil · 2006 3.99 from 1,520 ratings on Goodreads Climate and energy About the book As Einstein pointed out in his famous equation, E=MC2, all matter can be described as energy. It is everywhere; it is everything. In this engaging book, prolific author and academic Vaclav Smil provides an introduction to the far-reaching term and gives the reader a greater… On AmazonListen on Audible

More books for founders and investors on the [Reading List](https://millionrounds.com/reading-list?role=founder&industry=climate&stage=series_a).

As an Amazon Associate we earn from qualifying purchases.

## Quick answers about series A energy investors

### Who are the most active series A energy investors?

By cheques observed, the most active are Y Combinator, Techstars, National Science Foundation, Andreessen Horowitz and New Enterprise Associates.

### How many series A energy investors are there?

452 are on record. 90% made an investment in the last 12 months and 54% have led a round.

### Which stages do series A energy investors back?

Of the rounds with a named stage in the last 12 months, mostly Seed (26%) and Series A (24%).

### How big are the rounds series A energy investors join?

The typical (median) round among the leading investors here is $18M.

### Which sectors do series A energy investors back most?

In the last 12 months, mostly AI, Biotech and Healthcare.

### Which series A energy investors lead the most rounds?

Andreessen Horowitz (114 led), General Catalyst (97 led) and Lightspeed Venture Partners (83 led).

### Where are series A energy investors based?

Most of the leading investors here are based in the United States (21 of the top 25); the rest in France and the United Kingdom.

### What have series A energy investors invested in recently?

Recent rounds include Fathom Therapeutics (Nov 2026, with Sutter Hill Ventures), Vensum Power (Series A, Nov 2026, with Lifeline Ventures) and Humble Robotics (Series A, Nov 2026, with Obvious Ventures).

Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)