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From 'heartburn' to $14 billion: Inside Menlo's early Anthropic investment that broke all the rules.

Reported by Business Insider
Jul 16, 2026· 3 min read
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Key Takeaways
  • • Menlo Ventures converted an estimated $1 billion investment into approximately $14 billion in value through its early backing of Anthropic, representing a 14x return as the AI company prepares for a 2026 public offering.
  • • Partner Matt Murphy greenlit the investment despite significant internal resistance ("heartburn"), after a brief 5-minute Zoom call with CEO Dario Amodei in early 2023, when Anthropic was pre-revenue and valued at $4.1 billion—well above Menlo's typical venture range.
  • • Menlo committed to Anthropic across every funding round since 2023 and launched the Menlo Anthology Fund ($100 million) in partnership with Anthropic to invest in early-stage AI startups, cementing its position in the AI ecosystem.
  • • The Anthropic bet has elevated Menlo Ventures' institutional profile, establishing the 50-year-old firm as a major player in AI investing alongside established portfolio successes like Uber and Roku.
  • • Menlo raised $3 billion for its largest-ever fund, capitalized in part by the transformative returns from its Anthropic position, signaling confidence in identifying and scaling generational AI investments.
Summary
Menlo Ventures' contrarian $1 billion investment in Anthropic has become one of the most profitable venture capital bets in recent memory. As Anthropic prepares to go public in late 2026, Menlo's cumulative stake across multiple funding rounds is valued at approximately $14 billion—a remarkable return on capital that required the firm to disregard its own investment criteria.

The decision to back Anthropic came in early 2023 when the company was pre-revenue, had not publicly launched its language model, and carried a $4.1 billion valuation far exceeding Menlo's typical venture investment parameters. Partner Matt Murphy was introduced to CEO Dario Amodei through a five-minute Zoom call that proved decisive. Despite internal firm skepticism—Murphy acknowledged "definite heartburn within the firm"—he became convinced that Anthropic could establish itself as a credible competitor to OpenAI, then valued at $29 billion. Murphy's conviction centered on Amodei's technical vision and market positioning, seeing Anthropic positioned as "the Pepsi to OpenAI's Coke" in a market large enough to support multiple formidable players.

Menlo's commitment extended beyond the initial 2023 round; the firm participated in every subsequent Anthropic funding round, demonstrating sustained conviction despite the company's elevated cost of capital. Beyond direct equity investment, Menlo launched the Menlo Anthology Fund, a $100 million partnership with Anthropic designed to capitalize on emerging opportunities in early-stage AI companies. This dual investment strategy positioned Menlo at the center of the AI investment ecosystem.

The Anthropic investment has materially reshaped Menlo's profile and fundraising capacity. The 50-year-old firm, while respected for portfolio successes including Uber and Roku, previously occupied a secondary tier in the venture hierarchy. The Anthropic returns have elevated its institutional standing significantly. In 2026, Menlo announced a $3 billion capital raise—its largest fund to date—partly validated by the success of its Anthropic position and the firm's demonstrated capability to identify transformational AI investments.

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Business Insider From 'heartburn' to $14 billion: Inside Menlo's early Anthropic investment that broke all the rules.