Valar's post dated 4 Aug 2026 (TechCrunch reported it on Monday 3 Aug) announces 'the closing of a $1 billion Series B financing led by Sequoia Capital', with Apandion, Atreides Management, Conviction, Dream Ventures, HOF Capital, Point72, Riot Ventures, Snowpoint Ventures and Valor Equity Partners, plus unnamed investors, and says Sequoia partner Shaun Maguire joins the board. Valar's law firm, Goodwin Procter, published a matching deal announcement naming the same investors. Sequoia's own portfolio page lists Valar as 'Partnered 2026', names partners Shaun Maguire and Liam Corrigan, and says Valar 'sells power rather than reactors'. TechCrunch says the company did not disclose a valuation and that Bloomberg reported $6 billion; The Next Web gives $6 billion and calls it three times the $2 billion of the spring (fund-006). Sacra's page quotes Bloomberg as saying the deal 'values Valar at $6 billion, including the money being invested', that is, a post-money figure. The Bloomberg and Axios reports behind the $6 billion could not be read. Before the close, TechCrunch (17 July) reported, from three sources, that part of the $1 billion had been raised earlier at a lower valuation; Valar's post does not break the round into tranches, but Sacra's share-class table does (fund-008, fund-023). The post says the money moves Valar from one demonstrated reactor to 'producing fleets of them en masse', with its own fuel production; its other claims are checked in orig-070 and fund-019.

• Announcing our $1B Series B Led By Sequoia (Isaiah Taylor) (Valar Atomics, 2026-08-04) primary company “the closing of a $1 billion Series B financing led by Sequoia Capital”
• Goodwin Guides Valar Atomics on $1 Billion Series B and $200 Million Credit Facility (Goodwin Procter LLP (Valar's counsel), 2026-08-04) primary company
• Valar Atomics (portfolio page: Founded 2023, Partnered 2026; partners Shaun Maguire, Liam Corrigan) (Sequoia Capital) primary company “Valar Atomics is scaling nuclear fission reactors to make energy in the universe cheaper”
• Sequoia's Shaun Maguire leads $1B round for nuclear startup Valar Atomics (Julie Bort) (TechCrunch, 2026-08-03) news “did not disclose its valuation, Bloomberg reported that it was $6 billion”
• Sequoia leads $1 billion round for Valar Atomics as the nuclear startup triples its valuation to $6 billion (Ana-Maria Stanciuc) (The Next Web, 2026-08-03) news “three times the $2 billion valuation from its earlier round”
• Nuclear startup Valar Atomics in talks to raise new funding at $6B valuation (Marina Temkin) (TechCrunch, 2026-07-17) news “Part of that capital has been raised previously at a lower valuation”
• Valar Atomics valuation, funding & news (Valuation & Funding History table) (Sacra (research firm; partly paywalled)) analysis “values Valar at $6 billion, including the money being invested”