Anthropic, PBC has formally initiated the process for an initial public offering (IPO) by filing a registration statement on Form S-1 with the U.S. Securities and Exchange Commission (SEC). This document serves as the regulatory foundation for the proposed issuance of Class A common stock, which the company intends to list on the Nasdaq Global Select Market under the ticker symbol "ANT."

The core methodology of this financial procedure is dictated by the Securities Act of 1933, which mandates the filing of a registration statement to ensure transparency and disclosure before securities are offered to the public. The filing marks the beginning of the "quiet period" and preliminary marketing phase. During this stage, the valuation and quantity parameters remain undefined, as the determination of the offering price $P$ and the number of shares $N$ is contingent upon market conditions and subsequent book-building processes. The total gross proceeds $G$ are represented by the function:

$G = \sum_{i=1}^{N} P_i$

where $N$ is the finalized number of shares and $P_i$ is the issue price per share.

At this juncture, the registration statement has not yet been declared effective by the SEC. Consequently, the company is prohibited from selling or accepting offers to purchase the stock. The document emphasizes that the announcement functions as a notification of intent rather than an offer to sell or a solicitation to buy. Distribution of the preliminary prospectus is restricted to authorized financial institutions, specifically Goldman Sachs & Co. LLC and Morgan Stanley & Co. LLC, who serve as the primary conduits for information dissemination to potential investors. The offering remains subject to further regulatory review, and any final transaction is legally contingent upon the SEC granting effectiveness to the registration statement under relevant securities laws.