Compare IPO filing amendments without losing the offering

A focused amendment review

• Open the latest amendment and the immediately preceding document from the same registration.
• Compare the cover: share count, price language, selling stockholders, exchange and security class.
• Compare newly reported periods in financial statements and MD&A; separate period updates from changes in accounting presentation.
• Read risk-factor and governance changes in full context.
• Record the exact accessions and section headings behind your note.

Three useful traps in the selected cohort

Figma’s registration trail contains an original S-1, two amendments and a final 424B4. Circle’s June IPO and August follow-on have different registration numbers. Medline’s original IPO and later 2026 offerings also have different registration numbers. A company-wide “newest prospectus” rule would select the wrong offering for those IPO histories.

Cerebras has a withdrawn 2024 registration outside the selected 2026 file number. Keep the old registration separate when explaining its history.

Write an evidence note, not a sentiment score

A useful note says which section changed, the before-and-after wording or field, and why it affects your research question. A text diff can find candidates; it does not decide materiality by itself.

Start in the filing history and open the source versions. The current table is a document trail, not an automated semantic change detector.