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Not an offer of securities for sale. Not for forwarding or distribution to any person outside the United Kingdom. Capital at risk. See important information below.

The value of investments can fall as well as rise and you may get back less than you invest. Initial public offerings carry a high degree of risk. When you apply for Shares you will not know the exact purchase price or how many Shares you may receive, if any.

The Shares will not be listed on a UK exchange and there are differences between the regulatory framework in the United States compared to the regulatory framework that would apply if the Shares were listed on a UK exchange. In addition, the sterling price of overseas investments, and any income from them, is subject to exchange rate fluctuations. The UK Retail Offer is open only to persons resident and physically located in the United Kingdom. This communication must not be forwarded or otherwise distributed to any person outside the United Kingdom.

interactive investor does not advise on the suitability of new issues and nothing in this communication is a personal recommendation. If you are in any doubt you should contact an independent financial adviser. Tax treatment depends on your individual circumstances and may change.

Important information

This communication is only directed at, and for viewing by, persons resident and physically located in the United Kingdom.

This communication relates to the proposed offer of shares of class A common stock in the capital of Anthropic, PBC (the "Company") and, where the context requires, CREST depository interests constituted under English law and representing rights to such shares of class A common stock on a one-for-one basis (the "Shares") to persons resident and physically located in the United Kingdom (the "UK Retail Offer"), which would be facilitated through the public offer platform operated by Retail Book Limited ("RetailBook"). RetailBook is authorised and regulated by the Financial Conduct Authority (the "FCA") (FRN 994238). The UK Retail Offer would form part of an offering of Shares registered with the U.S. Securities and Exchange Commission (the “SEC”) under the U.S. Securities Act of 1933, as amended.

This communication does not constitute an offer or invitation to sell or issue, or any solicitation of any offer to purchase or subscribe for, Shares in the United States or in any other jurisdiction. The information contained in this communication must not be distributed, forwarded, reproduced, copied or published in any jurisdiction where to do so would breach applicable laws or regulations or require registration or any other measures. Do not share the information contained in this communication with anyone outside the United Kingdom.

The Company has filed a registration statement on Form S-1 (the "Registration Statement") with the SEC relating to the offering of the Shares. The Registration Statement has not yet become effective. The Shares may not be sold, nor may offers to buy be accepted, prior to the time the Registration Statement becomes effective. Copies of the U.S. prospectus (including a preliminary U.S. prospectus) (the "U.S. Prospectus"), when available, may be obtained for free by visiting EDGAR on the SEC's website at www.sec.gov.

Neither the SEC nor any state securities commission has approved or disapproved of these Shares or passed on the adequacy or accuracy of the U.S. Prospectus. Any representation to the contrary is a criminal offence.

Whilst the U.S. Prospectus is referred to as a 'prospectus', none of the U.S. Prospectus, the disclosure summary relating to the UK Retail Offer (the “Disclosure Summary”) nor any other document produced in connection with the UK Retail Offer or the offering of Shares in any other jurisdiction is a prospectus for the purposes of The Public Offers and Admissions to Trading Regulations 2024 (the "POATRs") and/or the Prospectus Rules: Admission to Trading on a Regulated Market sourcebook forming part of the FCA's Handbook of Rules and Guidance (the "UK PRM") and none of these documents has been reviewed or approved by the FCA. The U.S. Prospectus and the Disclosure Summary may not contain the same information as would be included in a prospectus for the purposes of the POATRs and/or the UK PRM.

The Shares will not be admitted to listing on the Official List of the FCA or admitted to trading on a regulated market or primary MTF (as such terms are defined in the POATRs) in the United Kingdom.

The UK Retail Offer, if made, will be made by means of a regulated platform under paragraph 13 of Part 1 of Schedule 1 to the POATRs and as a “qualifying public offer” as defined in, and meeting the requirements of, article 25DB of the Financial Services and Markets Act 2000 (Regulated Activities) Order 2001. No prospectus is required to be, or has been, prepared or published in the United Kingdom in connection with the UK Retail Offer.

This communication is prepared by and is the sole responsibility of interactive investor, a firm authorised and regulated by the FCA.