Mission: bringing planetary-scale energy to humanity.
Cambridge, MA
Joined February 2019
- Tweets29
- Following35
- Followers1.2K
- Likes37
Assil Halimi retweeted
Apollo Atomics (@ApolloAtomics) builds nuclear reactors that fit on a truck.
Assil Halimi (@AssilHalimi) and Drew Walker launched at YC in Spring 2026 with one change to the pressurized water reactor, the design behind 80% of the world's nuclear plants: they shrank the steam generator.
Their Compact Steam Generator is 20x smaller with the same thermal power. That turns a decade-long construction project into a factory-built machine deployable in under 24 months.
In August they announced a $31M seed:
▫️ $26M in equity led by FCVC
▫️ Y Combinator (@ycombinator), TeleSoft Partners, Robinhood Ventures and Nucleation Capital in the round
▫️ Paul Graham (@paulg) among the individual investors
▫️ $5M in equipment financing from Oak Ridge Financial
@guilleflorvs and I backed them through GR Angel.
xitter.cf/rdominguezibar/status/…
PERSONAL NEWS: After 1 year in stealth @guilleflorvs and I are launching GR Angel
We invest in exceptional founders, put them in front of one of the biggest tech audiences in the world: + 600k followers, + 400k subs & 10M weekly views
Across our personal angel investments and GR Angel, we’ve now backed:
→ A portfolio that has raised $1.2B+
→ Companies including HappyRobot, Replit, Starcloud, Peec ai
→ Alongside investors including a16z, Sequoia, Founders Fund and General Catalyst
→ 1 Exit: Portco went from $10Kmrr to 7M arr in close to 1 year
Our distribution has helped startups get millions of views, increase their ARR, and receive term sheets
Now we’re looking for the most cracked founders worldwide, investing bigger checks, and hiring
you can reach out to us 24 7 👀
Assil Halimi retweeted
@ApolloAtomics is joining the AI for Nuclear Energy Consortium to help bring advanced artificial intelligence into the design, licensing, manufacturing, and operation of the next generation of nuclear systems.
Led by @INL and established under the @ENERGY Genesis Mission, the consortium brings together national laboratories, universities, nuclear companies, and technology leaders such as @nvidia and @Microsoft.
For Apollo, this work aligns directly with our mission: combining advanced engineering, modern manufacturing, and digital tools to make nuclear energy faster to deploy, more scalable, and more cost-effective.
Assil Halimi retweeted
I turned up at the YC office this morning to find @ApolloAtomics installing the primary loop autoclave for their nuclear reactor 😬
It’s the new component that means their SMRs will be 80% smaller than traditional designs.
Assil Halimi retweeted
The nuclear reactor at YC Demo Day will be a sight to see, can't wait for you to see it
Assil Halimi retweeted
We’re pleased to see this coordinated federal support framework for advancing nuclear power in space. At BWXT, we’re excited to be part of this momentum. Expanding America’s space nuclear capabilities is key to enabling national security missions and making a sustained presence on the Moon, Mars and beyond a reality.
Learn more about our work in space nuclear systems at: bwxt.com/space
Today, we are releasing new guidance to Federal agencies for establishing a National Initiative for American Space Nuclear Power, as called for by President Trump’s EO on Ensuring American Space Superiority.
Nuclear power in space will give us the sustained electricity, heating, and propulsion essential to a permanent presence on the Moon, Mars, and beyond.
whitehouse.gov/wp-content/up…
Assil Halimi retweeted
Thank you to @Framatome_ for sponsoring today’s @ANS_org TopFuel 2022 plenary! 👏🏽 It was a full house!
Thanks also to our speakers from @Framatome_ (Ala Alzaben), @GovNuclear (Andy Griffith), @NCStateEngr (Alina Jugan), @mit_nse (@AssilHalimi), and @WECNuclear (Tarik Choho). – at Raleigh, NC
