Who owns Anthropic PBC

Anthropic PBC - Profile

Anthropic is an artificial intelligence safety and research company based in San Francisco that builds Claude, a family of large language models sold in tiers under the names Haiku, Sonnet and Opus. It was founded in January 2021 by seven former OpenAI staff, among them the siblings Dario Amodei, its chief executive, and Daniela Amodei, its president, and it is incorporated as a public benefit corporation, with a Long Term Benefit Trust holding governance rights intended to keep the mission ahead of shareholder return. Revenue comes from a paid consumer and business chat product, a developer API, agentic coding tools such as Claude Code, and resale of model access through the major cloud platforms. Its research output includes Constitutional AI, a training method that steers model behaviour using an explicit written set of principles rather than human preference labels alone, and a substantial body of published work on interpretability and evaluation.

The disclosed stakes

One row per position. Where a holder reports the same company in two share classes, both rows are shown rather than summed, because the class is part of a position's identity.

Where each figure comes from

A private stake has no ownership form behind it, so the source is always the holder's own filing or disclosure. Anything modelled says so, with the arithmetic.

• Amazon.com, Inc., as of 30 Jun 2026. Value is the sum of the two carrying amounts Amazon discloses at 30 Jun 2026: nonvoting preferred stock of approximately $92.5bn plus convertible notes at estimated fair value of approximately $97.9bn. Amazon does not disclose share counts or an ownership percentage for Anthropic. source
• Alphabet Inc., as of 30 Jun 2026. No share count is filed anywhere. Two separately sourced inputs are combined. (1) Percentage: Alphabet has been reported at roughly 14% of Anthropic in straight equity with no voting rights, no board seat and no board observer, hard-capped at 15%. (2) Value: Alphabet's Q2 2026 10-Q reports the carrying value of non-marketable equity securities under the measurement alternative at $124,259 million as of 30 Jun 2026 and states in footnote 1 that these 'primarily consist of our investment in a private company'. The filing does not name that company. Press reporting attributes it to Anthropic. Treat $124.259bn as an upper bound on the Anthropic carrying value, not an exact one, because the line also contains other private holdings. A separate cross-check: 14% of the $350bn April 2026 valuation is about $49bn, so Alphabet's carrying value implies a materially higher mark than the April round price. sourcesource 2
• Microsoft. Microsoft's own announcement of 18 November 2025 says NVIDIA and Microsoft are committing to invest up to $10 billion and up to $5 billion respectively in Anthropic. That is a commitment ceiling, not a funded amount, and no share count, price per share or ownership percentage was published. Press coverage of the same announcement put Anthropic's valuation in the range of $350 billion, which would imply roughly 1.4 percent of Anthropic if the full $5 billion were funded at a $350 billion post-money mark, but neither the funded amount nor the pre-money versus post-money basis is disclosed, so pct_of_target is left null rather than modelled on two unverified inputs. source
• Micron Technology. Size deliberately left null. Micron and Anthropic both declined to disclose the amount, and the round is large enough ($65bn raised at $965bn post-money) that any modelled share of it would span more than an order of magnitude. No defensible input exists, so no estimate is offered. Labels corrected 20 Aug 2026. This row previously carried confidence 'disclosed', a value used exactly once across all 499 files and absent from audit.py's CONFIDENCE_ENUM of filed, contingent, estimated and reported. It is now 'reported', which is in that enum and is the pairing already used by the two sibling company_disclosure rows in this corpus (JPMorgan's C6 Bank and Walmart's Asda). The basis stays 'company_disclosure', which IS a valid member of BASIS_LABEL in lib/format.ts where it renders as 'company statement', and which is accurate: Micron itself announced the investment on 22 June 2026 alongside the supply agreement, and the press article cited is coverage of that announcement rather than an independent source. The correction matters beyond tidiness: components/PositionsPanel.tsx marks a row as soft, meaning visibly caveated, when confidence is estimated, reported or contingent, or basis is modelled, press_report or announced_transaction. 'disclosed' matched none of those, so this unsized, announced-not-filed strategic investment was rendering as hard fact. Under 'reported' it is correctly flagged as soft. sourcesource 2