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One investor's early Anthropic bet could become one of Silicon Valley's biggest wins

Reported by Businessinsider
Oct 26, 2026· 2 min read
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Key Takeaways
  • • Spark Capital is the only traditional venture capital firm named in Anthropic's S-1 filing, with more than 50 mentions, according to Business Insider.
  • • Spark has invested $777 million in Anthropic across six financings since its 2023 entry, per the filing.
  • • Yasmin Razavi led the $450 million Series C at a $4.5 billion valuation in May 2023 and holds a board seat.
  • • The firm's first-round investment of $75 million was priced at $11.22 per share.
  • • Anthropic's upcoming IPO will be the public markets' first major test of CEO Dario Amodei's track record.
Summary
Spark Capital is the only traditional venture capital firm named in Anthropic's S-1 registration statement, according to Business Insider, and is referenced more than 50 times in the filing. Other venture investors, including Lightspeed and Menlo Ventures, are major Anthropic backers but are not named as traditional VC firms in the document.

The prominence of Spark's name reflects the role of partner Yasmin Razavi, who joined Anthropic's board after leading the $450 million Series C at a $4.5 billion valuation in May 2023. Business Insider reports that the round came about six months after ChatGPT's public release, when the outcome of the competition between OpenAI and a rival such as Anthropic was uncertain and many investors viewed the price as too expensive. Razavi told Forbes, "It was a big leap of faith, but this was the team that built GPT-3."

The filing states that Spark has invested $777 million in Anthropic across six financings since that initial round, including a $75 million first pivotal investment at $11.22 per share. Spark previously was known for early bets on Postmates and Discord, but Business Insider characterizes the Anthropic investment as the factor that elevated the firm's reputation in Silicon Valley.

Razavi has said she has been consistently impressed by CEO Dario Amodei, quoting her Forbes interview: "Every year, he puts out outrageous numbers, but somehow they magically become true. Dario never misses." Business Insider notes that Anthropic's public listing will now test Amodei's forecasts against public-market scrutiny.

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Sources

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Businessinsider One investor's early Anthropic bet could become one of Silicon Valley's biggest wins