Sequoia Joins Anthropic’s Mega Funding Round, Breaking the VC Rivalry Taboo

Sequoia Capital is making headlines again — this time for breaking one of Silicon Valley’s most unwritten rules.

According to the Financial Times, Sequoia is joining a massive funding round for Anthropic, the AI startup behind Claude. What makes this move remarkable is that Sequoia is already an investor in OpenAI and Elon Musk’s xAI — both direct competitors in the fast-moving AI race.

For decades, top venture capital firms avoided backing rival companies in the same category. The logic was simple: pick one winner, protect confidential information, and avoid conflicts. Sequoia’s reported Anthropic investment signals that this long-standing norm may no longer apply in the AI era.

Why This Investment Matters

The timing is especially notable. Last year, OpenAI CEO Sam Altman testified under oath that while OpenAI doesn’t outright ban investors from backing competitors, those with access to confidential information risk losing that access if they make “non-passive investments” in rivals. Altman described this as standard industry practice.

Yet Sequoia appears willing to navigate these boundaries.

Anthropic’s funding round is reportedly being led by Singapore’s GIC and U.S. investment firm Coatue, each committing $1.5 billion. Anthropic is aiming to raise $25 billion or more at a staggering $350 billion valuation — more than double its valuation from just four months ago. Microsoft and Nvidia have already committed up to $15 billion combined, with other investors adding billions more.

Sequoia and Sam Altman: A Long History

Sequoia’s relationship with Sam Altman goes back years. The firm backed Altman’s first startup, Loopt, after he dropped out of Stanford. Altman later served as a Sequoia “scout” and introduced the firm to Stripe — now one of Sequoia’s most successful investments.

Sequoia’s current co-leader, Alfred Lin, has also shown strong public support for Altman. When Altman was briefly removed from OpenAI in November 2023, Lin said he would eagerly back Altman’s next venture.

The Elon Musk Factor

Sequoia’s investment in xAI was already seen as a departure from its traditional “pick one winner” strategy. But many viewed that bet as part of Sequoia’s broader relationship with Elon Musk. The firm has backed Musk-led companies including SpaceX, Neuralink, The Boring Company, and X (formerly Twitter). Former Sequoia leader Michael Moritz was even an early investor in Musk’s original X.com, which later became PayPal.

A Sharp Turn From the Past

What makes the Anthropic move stand out is Sequoia’s history of enforcing strict conflict rules. In 2020, the firm famously walked away from payments startup Finix after deciding it competed with Stripe. Sequoia forfeited its $21 million investment, gave up its board seat, and cut all information rights — an unprecedented move at the time.

That makes today’s strategy shift hard to ignore.

Leadership Changes and What’s Next

The reported Anthropic investment follows major leadership changes at Sequoia. Longtime global steward Roelof Botha was recently pushed aside, with Alfred Lin and Pat Grady taking control. Grady, notably, led the Finix deal years earlier.

Anthropic is now reportedly preparing for an IPO that could happen as soon as this year.

The Bigger Picture

Sequoia’s move suggests that AI may be too big — and too uncertain — for traditional VC rules. Instead of betting on one winner, top firms may now be positioning themselves across the entire AI landscape.

If confirmed, this investment could mark a turning point in how venture capital approaches competition in frontier technologies.

The old rulebook may no longer apply.