# Nucleation Capital: portfolio, investments and team > Nucleation Capital is a vc firm based in United States. 2 investments on record, 1 in the last 12 months, latest Aug 2026. Source: https://millionrounds.com/fund/nucleation-capital (Millionrounds; every figure on the page links to its filing or article) United States · [Investor](https://millionrounds.com/investors) # Nucleation Capital Last cheque observed Aug 2026; 2 cheques on record. Email VC firm Deploying now New fund $1.7M, Oct 2026 Seed Series A Nuclear Carbon Management Follow Nucleation Capital and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Fnucleation-capital) Deploying now **100%** of best year **1** **cheques in 12 months**, 2 on record Since the last cheque **77** days **00** hrs **00** min **00** sec Median round **$66M** Rounds led **0 of 2** Pitch Nucleation Capital ## Nucleation Capital highlights - 01 1 cheques in the last 12 months - 02 Mostly Seed and Series B: 100% of its rounds ## What they do > Nucleation Capital is a venture fund focused on investing into advanced nuclear and carbon management innovations From their own website - **Type:** VC firm (from a list, unverified) - **Cheque size:** Not stated - **Stages:** Seed Series A - **Sectors:** Nuclear Carbon Management - **Based in:** Menlo Park, United States - **Cold pitches:** Not accepted ## The record Every round we can evidence, newest first **2 appearances** - **2026** 1 round - **Aug** **[Apollo Atomics](https://millionrounds.com/company/apollo-atomics)** Seed · US · Monte Carlo Capital **$31M** With 12 others - **2025** 1 round - **Aug** **[Aalo Atomics](https://millionrounds.com/company/aalo-atomics)** Series B · US · TechCrunch **$100M** With 15 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 Named by the firm itself, on a filing, its Form ADV or its company registration **1 named** ST **Sonya Thomas** General partner i Filing they signed We also hold **4** people 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. ## What they claim to have backed From their own portfolio page (on their website) **1** of 6 we have independently watched raise [Atomic Insights](https://millionrounds.com/company/atomic-insights) AI-Powered Nuclear Learning Zone Fund I Subscriber Portal Invest in climate solutions Statcounter Tools Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded. New fund on file **$1.7M** raised in Oct 2026 From its SEC filing, not a journalist: a firm that has just raised has money to deploy. ## The cheque Seed Series A Median round joined **$66M** the round, not its cheque Led 0 of 2 rounds **0%** - **Sole investor:** Never alone - **Last cheque:** Aug 2026 Rounds by stage said on their site - Seed said *1* - Series B *1* - Series A said *-* Cheques by month Led Joined Dec 2023 Nov 2026 Often in the room with - [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) 2 **Pitching Nucleation Capital?** Put them on your fundraising board with this record on the card, and follow them to hear when they write a new cheque. Add to your CRM *→* ## Who they invest alongside The investors most often in the same rounds as Nucleation Capital. A count of rooms they were both in, not a relationship either has claimed. [**Alumni Ventures** VC firm **2** rounds together](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) ## Recently backed The latest companies Nucleation Capital put money into. [**Aalo Atomics** $100M · Aug 2025](https://millionrounds.com/company/aalo-atomics) ## Quick answers about Nucleation Capital ### What does Nucleation Capital invest in? Nucleation Capital invests most often at Seed and Series B (100% of the rounds on record), in sectors such as Nuclear and Carbon Management. ### How active is Nucleation Capital? 2 investments on record, 1 of them in the last 12 months. The most recent was in Aug 2026. ### What has Nucleation Capital invested in recently? Its most recent investments on record: Apollo Atomics (Seed, Aug 2026) and Aalo Atomics (Series B, Aug 2025). ### How big are Nucleation Capital's cheques? The median round it joins is $66M. ### Is Nucleation Capital investing now? Yes: it is actively investing, with 1 investments in the last 12 months. ### Who does Nucleation Capital invest alongside? Most often Alumni Ventures (2 rounds together). ### What kind of investor is Nucleation Capital? Nucleation Capital is a VC firm based in Menlo Park, United States. ### Has Nucleation Capital raised a new fund? Its latest fund filing with the SEC was in Oct 2026, reporting $1.7M raised. ## Raising now? Find the investors who back rounds like yours, and keep every conversation on one fundraising board. Find similar investorsOpen your CRM 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=nucleation-capital) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=nucleation-capital)