Resolution criteria

This market will resolve based on the official publication date of Anthropic, PBC's public Form S-1 registration statement on the SEC's EDGAR system. The options are defined as follows:

• By EOD September 9: Resolves YES if Anthropic's public S-1 is officially filed on the SEC EDGAR system on or before September 9, 2026, at 11:59 PM ET.

• By EOD September 11: Resolves YES if Anthropic's public S-1 is officially filed on the SEC EDGAR system after September 9, 2026, at 11:59 PM ET, and on or before September 11, 2026, at 11:59 PM ET.

• By EOD September 18: Resolves YES if Anthropic's public S-1 is officially filed on the SEC EDGAR system after September 11, 2026, at 11:59 PM ET, and on or before September 18, 2026, at 11:59 PM ET.

• After September 18 2026: Resolves YES if the public S-1 filing is posted to the SEC EDGAR system after September 18, 2026, at 11:59 PM ET, or if no public S-1 has been filed by that date.

Source of Truth: The primary source of truth is the SEC EDGAR Company Search tool. The filing must be a public Form S-1 (not the confidential draft originally submitted in June 2026).

Background

Anthropic, PBC confidentially submitted its draft Form S-1 registration statement to the U.S. Securities and Exchange Commission (SEC) on June 1, 2026, to begin the private IPO review process. In early September 2026, financial media outlets reported that Anthropic plans to publicly unveil its IPO prospectus (releasing the public S-1 filing) shortly after the Labor Day holiday (September 7, 2026), setting up a potential public listing for late September or early October. This market tracks when that public registration statement will officially hit the SEC's database.

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Resolution criteria

This market will resolve based on the official publication date of Anthropic, PBC’s public Form S-1 registration statement on the SEC’s EDGAR database.

Only one of the following answers will resolve YES, while the rest will resolve NO:

• By EOD September 9: Resolves YES if Anthropic's public Form S-1 is officially filed on the SEC EDGAR system on or before September 9, 2026, at 11:59 PM ET.

• Sept 10 - 11: Resolves YES if Anthropic's public Form S-1 is officially filed after September 9, 2026, at 11:59 PM ET, and on or before September 11, 2026, at 11:59 PM ET.

• Sep 12 - 18: Resolves YES if Anthropic's public Form S-1 is officially filed after September 11, 2026, at 11:59 PM ET, and on or before September 18, 2026, at 11:59 PM ET.

• After September 18 2026: Resolves YES if the public Form S-1 is filed after September 18, 2026, at 11:59 PM ET, or if no public S-1 has been filed by that date.

The primary source of truth is the SEC EDGAR Company Search tool. The filing must be a public Form S-1 (not the confidential draft originally submitted on June 1, 2026).

Background

Anthropic, PBC confidentially submitted its draft Form S-1 registration statement to the U.S. Securities and Exchange Commission (SEC) on June 1, 2026, to begin the private IPO review process. In late August and early September 2026, financial media outlets reported that Anthropic plans to publicly unveil its IPO prospectus shortly after the Labor Day holiday (September 7, 2026) in preparation for a public listing in late September or early October. This market tracks the exact window when that public registration statement officially becomes available in the SEC's EDGAR database.