# Carbon13: portfolio, investments and team

> Carbon13 is an accelerator based in United Kingdom. 40 investments on record, 13 in the last 12 months, latest Sept 2026.

Source: https://millionrounds.com/fund/carbon13 (Millionrounds; every figure on the page links to its filing or article)

United Kingdom · [Investor](https://millionrounds.com/investors)

# Carbon13

Last cheque observed Sep 2026; 40 cheques on record.

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Deploying now New fund $17M, Jun 2026 Accelerator

Pre-seed Seed Series A Environment Cleantech Climate

Follow Carbon13 and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Fcarbon13)

Deploying now

**87%** of best year **13** **cheques in 12 months**, 40 on record

Since the last cheque **60** days **00** hrs **00** min **00** sec

Median round **$800K** Cheque size, as they say **$100K – $5.0M** Rounds led **0 of 40** Mostly in **United Kingdom, 83%**

Pitch Carbon13

## Carbon13 highlights

- 01 13 cheques in the last 12 months
- 02 Mostly Pre-seed and Seed: 64% of its rounds

## What they do

> Carbon13 now offers a Venture Accelerator Programme From their own website

- **Type:** Accelerator (from a list, unverified)
- **Cheque size:** $100K – $5.0M as they say
- **Stages:** Pre-seed Seed Series A
- **Sectors:** Environment Cleantech Climate
- **Based in:** Cambridge, United Kingdom
- **Cold pitches:** Accepted

## The record

Every round we can evidence, newest first **40 appearances**

- **2026** 10 rounds
- **Sept** **[Pure Capture Innovations](https://millionrounds.com/company/pure-capture-innovations)** Pre-seed · GB **$718K** With 4 others
- **Sept** **[Ki 13](https://millionrounds.com/company/ki-13)** Seed · GB · Carbon13 **$5.0M** With 7 others
- **Aug** **[Climingo](https://millionrounds.com/company/climingo)** Pre-seed · GB · Carbon13 **$394K** With 3 others
- **Aug** **[HexSeed Technology](https://millionrounds.com/company/hexseed-technology)** Pre-seed · GB **$812K** With 2 others
- **Jul** **[Auralytica](https://millionrounds.com/company/auralytica)** Seed · GB · Carbon13 **$468K** With 1 other
- **Jun** **[Astracite](https://millionrounds.com/company/astracite)** Pre-seed · BE **$871K** With 1 other
- **Apr** **[Fermtech](https://millionrounds.com/company/fermtech)** Seed · GB · Firms' own news pages **$3.3M** With 3 others
- **Mar** **[Cocoon](https://millionrounds.com/company/cocoon)** Series A · US **$15M** With 2 others
- **Jan** **[TetraxAI](https://millionrounds.com/company/tetraxai)** Pre-seed · ES **$1.4M** With 2 others
- **Jan** **[Recycle Roots](https://millionrounds.com/company/recycle-roots)** Venture · GB **Undisclosed** With 1 other
- **2025** 14 rounds
- **Dec** **[Future Greens](https://millionrounds.com/company/future-greens)** Seed · GB **$456K** With 3 others
- **Nov** **[Lambda Quantech Ltd](https://millionrounds.com/company/lambda-quantech-ltd)** Grant · GB **$118K** With 4 others
- **Nov** **[Limetrack](https://millionrounds.com/company/limetrack)** Debt · GB **$1.3M** With 2 others
- **Oct** **[Nina Energy](https://millionrounds.com/company/nina-energy)** Pre-seed · EC **$268K** With 1 other
- **Oct** **[Carbon Cell](https://millionrounds.com/company/carbon-cell)** Grant · GB **$35K** With 4 others
- **Sept** **[17Cicada](https://millionrounds.com/company/17cicada)** Crowdfunding · US **$32K** With 1 other
- **Aug** **[Ki 13](https://millionrounds.com/company/ki-13)** Venture · GB **Undisclosed** With 2 others
- **Jul** **[Hoopsy](https://millionrounds.com/company/hoopsy)** Venture · GB **$272K** With 1 other
- **Jun** **[Samudra Oceans](https://millionrounds.com/company/samudra-oceans)** Venture · GB **Undisclosed** With 3 others
- **Jun** **[Kestrix](https://millionrounds.com/company/kestrix)** Seed · GB **$136K** With 3 others
- **Mar** **[Elaniti](https://millionrounds.com/company/elaniti)** Venture · GB **Undisclosed** With 3 others
- **Mar** **[PuriFire Energy](https://millionrounds.com/company/purifire-energy)** Venture · GB **Undisclosed** With 4 others
- **Jan** **[Nium](https://millionrounds.com/company/nium)** Venture · SG **Undisclosed** With 9 others
- **Jan** **[Adia Thermal](https://millionrounds.com/company/adia-thermal)** Pre-seed · GB **$1.7M** With 4 others
- **2024** 8 rounds
- **Dec** **[Differential Bio](https://millionrounds.com/company/differential-bio)** Pre-seed · DE **$2.1M** With 3 others
- **Nov** **[MannyAI](https://millionrounds.com/company/mannyai)** Pre-seed · GB **$1.3M** With 4 others
- **Nov** **[Deep Blue Biotech](https://millionrounds.com/company/deep-blue-biotech)** Pre-seed · GB **$800K** With 3 others
- **Nov** **[Eslando](https://millionrounds.com/company/eslando)** Grant · GB **$103K** With 2 others
- **Aug** **[CBAMBOO](https://millionrounds.com/company/cbamboo)** Pre-seed · GB **$1.5M** With 2 others
- **Jul** **[Mozaic Earth](https://millionrounds.com/company/mozaic-earth)** Pre-seed · GB **$643K** With 2 others
- **Jul** **[Optimise AI](https://millionrounds.com/company/optimise-ai)** Seed · GB **$951K** With 3 others
- **May** **[Remy](https://millionrounds.com/company/remy)** Pre-seed · GB **$438K** With 1 other
- **2023** 7 rounds
- **Nov** **[Samudra Oceans](https://millionrounds.com/company/samudra-oceans)** Pre-seed · GB **$1.0M** With 2 others
- **Oct** **[Kestrix](https://millionrounds.com/company/kestrix)** Venture · GB **Undisclosed** With 3 others
- **Jul** **[Materials Nexus](https://millionrounds.com/company/materials-nexus)** Seed · GB **$2.6M** With 2 others
- **May** **[Infyos](https://millionrounds.com/company/infyos)** Grant · GB **$213K** With 4 others
- **Apr** **[FoodSquared](https://millionrounds.com/company/foodsquared)** Pre-seed · GB **$137K** With 2 others
- **Mar** **[Preoptima](https://millionrounds.com/company/preoptima)** Pre-seed · GB **$1.2M** With 1 other
- **Feb** **[Kita](https://millionrounds.com/company/kita)** Seed · GB **$4.8M** With 2 others
- **2022** 1 round
- **Apr** **[Offgrid.Finance](https://millionrounds.com/company/offgrid-finance)** Pre-seed · GB **$300K** With 2 others

An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.

## The team

We hold **1** person at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.

New fund on file

**$17M**

raised in Jun 2026

From its SEC filing, not a journalist: a firm that has just raised has money to deploy.

## The cheque

Pre-seed Seed Series A

Median round joined **$800K** the round, not its cheque

Led 0 of 40 rounds **0%**

- **Said size:** $100K – $5.0M
- **Sole investor:** Never alone
- **Last cheque:** Sept 2026

Rounds by stage said on their site

- Pre-seed said *17*
- Seed said *8*
- Venture *8*
- Grant *4*
- Debt *1*
- Crowdfunding *1*
- Series A said *-*

Cheques by month Led Joined

Nov 2023 Oct 2026

Often in the room with

- [N1](https://millionrounds.com/fund/n1) 39
- [Innovate UK](https://millionrounds.com/fund/innovate-uk) 11
- [SFC Capital](https://millionrounds.com/fund/sfc-capital) 7
- [MassChallenge](https://millionrounds.com/fund/masschallenge) 3
- [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund) 2
- [British Design Fund](https://millionrounds.com/fund/british-design-fund) 2

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## Who they invest alongside

The investors most often in the same rounds as Carbon13. A count of rooms they were both in, not a relationship either has claimed.

[**N1** VC firm **39** rounds together](https://millionrounds.com/fund/n1)[**Innovate UK** VC firm **11** rounds together](https://millionrounds.com/fund/innovate-uk)[**SFC Capital** Angel network **7** rounds together](https://millionrounds.com/fund/sfc-capital)[**MassChallenge** Accelerator **3** rounds together](https://millionrounds.com/fund/masschallenge)[**British Business Bank** Corporate VC **2** rounds together](https://millionrounds.com/fund/national-security-strategic-investment-fund)[**British Design Fund** VC firm **2** rounds together](https://millionrounds.com/fund/british-design-fund)[**EIT Food RisingFoodstars** Accelerator **2** rounds together](https://millionrounds.com/fund/eit-food-risingfoo)[**Notion Capital** VC firm **2** rounds together](https://millionrounds.com/fund/notion-capital)[**Pale blue dot** VC firm **2** rounds together](https://millionrounds.com/fund/pale-blue-dot)[**Third Derivative** Accelerator **2** rounds together](https://millionrounds.com/fund/third-derivative)

## Recently backed

The latest companies Carbon13 put money into.

[**Ki 13** $5.0M · Sept 2026](https://millionrounds.com/company/ki-13)[**Climingo** $394K · Aug 2026](https://millionrounds.com/company/climingo)[**HexSeed Technology** $812K · Aug 2026](https://millionrounds.com/company/hexseed-technology)[**Auralytica** $468K · Jul 2026](https://millionrounds.com/company/auralytica)[**Astracite** $871K · Jun 2026](https://millionrounds.com/company/astracite)[**Fermtech** $3.3M · Apr 2026](https://millionrounds.com/company/fermtech)

## On podcasts

1 episode naming Carbon13 in the title, and 4 more that mention it.

- [UKTN: The Podcast](https://millionrounds.com/podcasts/uktn) 5 Dec 2023 · 26 min Net zero COP-outs and the case for climate tech optimism – Carbon13 CEO Nicky Dee Mentions [Carbon13](https://millionrounds.com/fund/carbon13) Apple PodcastsShow page

### Mentioned in

- [Angel Insights](https://millionrounds.com/podcasts/angel-insights) 21 Oct 2026 · 37 min Making retrofit an investable asset with GreenFlip's Amandeep Kalra Apple PodcastsShow page
- [Angel Insights](https://millionrounds.com/podcasts/angel-insights) 9 Apr 2025 · 28 min How Deep Blue Biotech is reprogramming bacteria to produce chemicals and eat CO2 Apple PodcastsShow page
- [Angel Insights](https://millionrounds.com/podcasts/angel-insights) 19 Feb 2025 · 25 min Methane: the super warmer gas that everyone's overlooked, and the startup turning it into clean energy Apple PodcastsShow page
- [Angel Insights](https://millionrounds.com/podcasts/angel-insights) 22 Jan 2025 · 29 min How Cocoon is tackling 7% of global carbon emissions Apple PodcastsShow page

## Quick answers about Carbon13

### What does Carbon13 invest in?

Carbon13 invests most often at Pre-seed and Seed (64% of the rounds on record), in sectors such as Environment, Cleantech and Climate.

### How active is Carbon13?

40 investments on record, 13 of them in the last 12 months. The most recent was in Sept 2026.

### What has Carbon13 invested in recently?

Its most recent investments on record: Pure Capture Innovations (Pre-seed, Sept 2026), Ki 13 (Seed, Sept 2026) and Climingo (Pre-seed, Aug 2026).

### How big are Carbon13's cheques?

The median round it joins is $800K. It says it writes cheques of $100K to $5.0M.

### Does Carbon13 lead rounds?

Rarely, if at all: none of its 40 investments on record names it as the lead.

### Where does Carbon13 invest?

Most of the companies it backs are in the United Kingdom (83%) and the United States (5%).

### Is Carbon13 investing now?

Yes: it is actively investing, with 13 investments in the last 12 months.

### Who does Carbon13 invest alongside?

Most often N1 (39 rounds together), Innovate UK (11 rounds together) and SFC Capital (7 rounds together).

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Built from the rounds we watched, its filings and its own website, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections?slug=carbon13) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=carbon13)