United States · 
Who invested in Oklo?
Oklo's investors include Y Combinator, MassChallenge and Draper Associates.
2026
$441MRound$1.0BRoundUnited States · Funded startup
Who invested in Oklo
Funding summaryUpdated 26 Oct 2026
$1.4Braised across 2 rounds since 2025, from 2 sources
$441MRound$1.0BRound
- Latest round
- Round, $1.0BSept 2026
- Step-upi
- 2.3×
- Investors
- 3
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Round, $441M Jun 2025
- Biggest round
- $1.0B Round · Sept 2026
- Between rounds
- 15 months from the last two
The rounds
- Sept 2026
- Jun 2025
Founders and team
From Oklo's own website: 2 founders, 15 on the team.
Jacob DeWitteCo-founder and CEO
Caroline DeWitteCo-founder and COO
- Erik LassenVice President of Engineering
- Michael DixonVice President of Accounting and Controller
- Alexandra RennerChief Product Officer
- Bill GoodwinChief Strategy Officer
- John HansonChief of Staff
- R. Craig BealmearChief Financial Officer
- Daniel B. PonemanBoard Member
- David A. ChristianBoard Member
- David ParkBoard Member
- Derek KanBoard Member
- Mark PetersBoard Member
- Michael KleinBoard Member
- Michael ThompsonBoard Member
- Richard W. KinzleyBoard Member
- Vivek NarayanadasGeneral Counsel and Corporate Secretary
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 6 firms list Oklo as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Oklo
How much has Oklo raised?
Oklo has raised $1.4B across 2 rounds since 2025.
When did Oklo last raise?
Oklo's most recent round was an Undisclosed round of $1.0B in Sept 2026.
What was Oklo's biggest round?
Its most recent round, $1.0B in Sept 2026, is also its largest on record.
Who backed Oklo first?
Oklo's first round on record, in Jun 2025, was backed by Y Combinator, MassChallenge and Draper Associates.
What stage is Oklo at?
Oklo's latest named round is an Undisclosed round, in Sept 2026.
Where is Oklo based?
Oklo is based in the United States.
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