United Kingdom · Investor

Carbon13

Last cheque observed Sep 2026; 40 cheques on record.

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Deploying nowNew fund $17M, Jun 2026Accelerator

Pre-seedSeedSeries AEnvironmentCleantechClimate

Deploying now
87%of best year13cheques in 12 months, 40 on record
Since the last cheque60days00hrs00min00sec
Median round$800KCheque size, as they say$100K – $5.0MRounds led0 of 40Mostly inUnited Kingdom, 83%
Pitch Carbon13

Carbon13 highlights

  1. 01

    13 cheques in the last 12 months

  2. 02

    Mostly Pre-seed and Seed: 64% of its rounds

What they do

Carbon13 now offers a Venture Accelerator ProgrammeFrom their own website
Type
Accelerator (from a list, unverified)
Cheque size
$100K – $5.0M as they say
Stages
Pre-seedSeedSeries A
Sectors
EnvironmentCleantechClimate
Based in
Cambridge, United Kingdom
Cold pitches
Accepted

The record

Every round we can evidence, newest first40 appearances

  1. 2026

    10 rounds

  2. Sept
    Pure Capture InnovationsPre-seed · GB$718KWith 4 others
  3. Sept
    Ki 13Seed · GB · Carbon13$5.0MWith 7 others
  4. Aug
    ClimingoPre-seed · GB · Carbon13$394KWith 3 others
  5. Aug
    HexSeed TechnologyPre-seed · GB$812KWith 2 others
  6. Jul
    AuralyticaSeed · GB · Carbon13$468KWith 1 other
  7. Jun
    AstracitePre-seed · BE$871KWith 1 other
  8. Apr
    FermtechSeed · GB · Firms' own news pages$3.3MWith 3 others
  9. Mar
    CocoonSeries A · US$15MWith 2 others
  10. Jan
    TetraxAIPre-seed · ES$1.4MWith 2 others
  11. Jan
    Recycle RootsVenture · GBUndisclosedWith 1 other
  12. 2025

    14 rounds

  13. Dec
    Future GreensSeed · GB$456KWith 3 others
  14. Nov
    Lambda Quantech LtdGrant · GB$118KWith 4 others
  15. Nov
    LimetrackDebt · GB$1.3MWith 2 others
  16. Oct
    Nina EnergyPre-seed · EC$268KWith 1 other
  17. Oct
    Carbon CellGrant · GB$35KWith 4 others
  18. Sept
    17CicadaCrowdfunding · US$32KWith 1 other
  19. Aug
    Ki 13Venture · GBUndisclosedWith 2 others
  20. Jul
    HoopsyVenture · GB$272KWith 1 other
  21. Jun
    Samudra OceansVenture · GBUndisclosedWith 3 others
  22. Jun
    KestrixSeed · GB$136KWith 3 others
  23. Mar
    ElanitiVenture · GBUndisclosedWith 3 others
  24. Mar
    PuriFire EnergyVenture · GBUndisclosedWith 4 others
  25. Jan
    NiumVenture · SGUndisclosedWith 9 others
  26. Jan
    Adia ThermalPre-seed · GB$1.7MWith 4 others
  27. 2024

    8 rounds

  28. Dec
    Differential BioPre-seed · DE$2.1MWith 3 others
  29. Nov
    MannyAIPre-seed · GB$1.3MWith 4 others
  30. Nov
    Deep Blue BiotechPre-seed · GB$800KWith 3 others
  31. Nov
    EslandoGrant · GB$103KWith 2 others
  32. Aug
    CBAMBOOPre-seed · GB$1.5MWith 2 others
  33. Jul
    Mozaic EarthPre-seed · GB$643KWith 2 others
  34. Jul
    Optimise AISeed · GB$951KWith 3 others
  35. May
    RemyPre-seed · GB$438KWith 1 other
  36. 2023

    7 rounds

  37. Nov
    Samudra OceansPre-seed · GB$1.0MWith 2 others
  38. Oct
    KestrixVenture · GBUndisclosedWith 3 others
  39. Jul
    Materials NexusSeed · GB$2.6MWith 2 others
  40. May
    InfyosGrant · GB$213KWith 4 others
  41. Apr
    FoodSquaredPre-seed · GB$137KWith 2 others
  42. Mar
    PreoptimaPre-seed · GB$1.2MWith 1 other
  43. Feb
    KitaSeed · GB$4.8MWith 2 others
  44. 2022

    1 round

  45. Apr
    Offgrid.FinancePre-seed · GB$300KWith 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.

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.

N1VC firm39rounds togetherInnovate UKVC firm11rounds togetherSFC CapitalAngel network7rounds togetherMassChallengeAccelerator3rounds togetherBritish Business BankCorporate VC2rounds togetherBritish Design FundVC firm2rounds togetherEIT Food RisingFoodstarsAccelerator2rounds togetherNotion CapitalVC firm2rounds togetherPale blue dotVC firm2rounds togetherThird DerivativeAccelerator2rounds together

Recently backed

The latest companies Carbon13 put money into.

Ki 13$5.0M · Sept 2026Climingo$394K · Aug 2026HexSeed Technology$812K · Aug 2026Auralytica$468K · Jul 2026Astracite$871K · Jun 2026Fermtech$3.3M · Apr 2026

On podcasts

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

Mentioned in

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 · Report a correction · Is this your firm? Claim it