# Oklo funding: rounds and investors > Oklo has raised $1.4B across 2 rounds since 2025. Investors include Y Combinator, MassChallenge and Draper Associates. Every round with its source. Source: https://millionrounds.com/company/oklo (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *Oklo* 2 rounds we have observed, with the 3 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. AI Raised 2 months ago Y Combinator: S14 Funding summary Updated 26 Oct 2026 **$1.4B** raised across 2 rounds since 2025, from 2 sources **$441M** Round **$1.0B** Round - **Latest round:** Round, $1.0B Sept 2026 - **Step-up i:** 2.3× - **Investors:** 3 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2026 **$441M** Round **$1.0B** Round - **First round:** Round, $441M - **Biggest round:** $1.0B - **Between rounds:** 15 months ## The rounds - **Sept 2026** Round **$1.0B** *3 returning* [Y Combinator](https://millionrounds.com/fund/y-combinator) [MassChallenge](https://millionrounds.com/fund/masschallenge) [Draper Associates](https://millionrounds.com/fund/draper-associates) Source recorded - **Jun 2025** Round **$441M** *3 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [MassChallenge](https://millionrounds.com/fund/masschallenge) [Draper Associates](https://millionrounds.com/fund/draper-associates) Source recorded ## Founders and team From Oklo's own website: 2 founders, 15 on the team. **Jacob DeWitte** Co-founder and CEO **Caroline DeWitte** Co-founder and COO - **Erik Lassen** Vice President of Engineering - **Michael Dixon** Vice President of Accounting and Controller - **Alexandra Renner** Chief Product Officer - **Bill Goodwin** Chief Strategy Officer - **John Hanson** Chief of Staff - **R. Craig Bealmear** Chief Financial Officer - **Daniel B. Poneman** Board Member - **David A. Christian** Board Member - **David Park** Board Member - **Derek Kan** Board Member - **Mark Peters** Board Member - **Michael Klein** Board Member - **Michael Thompson** Board Member - **Richard W. Kinzley** Board Member - **Vivek Narayanadas** General 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. **Round** 2025 **Round** 2026 [Y Combinator](https://millionrounds.com/fund/y-combinator) [MassChallenge](https://millionrounds.com/fund/masschallenge) [Draper Associates](https://millionrounds.com/fund/draper-associates) ## Everyone who backed them [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **2** rounds [MassChallenge](https://millionrounds.com/fund/masschallenge) Accelerator **2** rounds [Draper Associates](https://millionrounds.com/fund/draper-associates) VC firm **2** rounds Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=oklo). ## 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. [Draper Dragon](https://millionrounds.com/fund/draper-dragon) VC firm Per its own site [Open Field Capital](https://millionrounds.com/fund/open-field-capital) VC firm Per its own site [Kluz Ventures](https://millionrounds.com/fund/kluz-ventures) VC firm Per its own site [Forward Deployed Venture Capital](https://millionrounds.com/fund/forward-deployed-venture-capital) VC firm Per its own site [Launch Alaska](https://millionrounds.com/fund/launch-alaska) Accelerator Per its own site [Tuesday Capital](https://millionrounds.com/fund/crunchfund) VC firm Per its own site ## Quick answers about Oklo ### Who invested in Oklo? Oklo's investors include Y Combinator, MassChallenge and Draper Associates. ### 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. ## Companies like Oklo In the same sector, and raised in the last eighteen months. [**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Pika** $216M · Oct 2026](https://millionrounds.com/company/pika)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app