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Sources & methodology
IPO Prospectuses

Source-linked research

IPO prospectus library methodology

IPO Prospectuses is a Synoptic-owned publication. The initial library is a selected source collection rather than an exhaustive archive or an official SEC service.

Synoptic research·Reviewed 2026-11-14·How we assess sources

Selection and verification

Seven registration file numbers were selected for accessible primary documents and useful differences in offering structure or document stage. The library contains preliminary examples for Anthropic and Uptrend and final IPO examples for Cerebras, Medline, Figma, Chime and Circle.

The original SEC submissions JSON and selected source documents were retrieved; the document covers were checked on November 14, 2026. Each library row preserves filing date, form and links to the original document and index. Compressed source archives and retrieval hashes are retained for maintenance evidence.

Freshness and classification

The review date refers to source selection and document classification. The documents themselves retain their historical filing dates. This site does not claim that an IPO prospectus supplies current company information.

A 424B4 is included as a final IPO example only after checking the cover and matching the selected registration. A preliminary row describes the selected document stage at review; later events require another source check.

Maintenance and reuse

Re-run the selected-cohort SEC updater, review the new accessions and verify any replacement document before changing the library. Add a foreign-issuer or sector example only with its original filing link and a documented research purpose. No daily refresh service is claimed.

The site links to original SEC HTML instead of presenting copied full prospectuses as its own content. Public document access does not settle every right in third-party exhibits. Report broken links or classification errors through Synoptic contact with the relevant accession.

Source notes

  1. SEC submissions API ↗

    Public filing metadata and historical file structure

  2. SEC fair access ↗

    Declared User-Agent and request limits

  3. Anthropic, PBC — S-1/A (2026-11-10) ↗

    Preliminary prospectus; selected registration document

  4. Uptrend Holdings Ltd — F-1/A (2026-11-12) ↗

    Preliminary prospectus; selected registration document

  5. Cerebras Systems Inc. — 424B4 (2026-05-14) ↗

    Final IPO prospectus; selected registration document

  6. Medline Inc. — 424B4 (2025-12-18) ↗

    Final IPO prospectus; selected registration document

  7. Figma, Inc. — 424B4 (2025-07-31) ↗

    Final IPO prospectus; selected registration document

  8. Chime Financial, Inc. — 424B4 (2025-06-12) ↗

    Final IPO prospectus; selected registration document

  9. Circle Internet Group, Inc. — 424B4 (2025-06-05) ↗

    Final IPO prospectus; selected registration document

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