Possible new Gossamer Bio shares

GOSSDilution

Known so far: no new shares from the prospectus covers read · shelf not limited by the baby-shelf rule · not yet read: warrants, converts, options, ATM.

Shelf room

  • Room today not capped by the baby-shelf rule ($271M float, Jun 28, 2025)
How this is worked out

Shelf room on the S-3ASR of Jan 28, 2026: not limited by the baby-shelf rule, because the $271M public float stated as of Jun 28, 2025 is $75M or more. Sources: S-3ASR Jan 28, 2026, effective Jan 28, 2026 · public float, as of Jun 28, 2025.

What could become new Gossamer Bio (GOSS) shares, from its 10-Q, 10-K, S-3 or 424B filings.

Read so far: the cover share count (488.8M shares, +115% from 227M on Jul 31, 2025). Not read yet: warrants, convertible notes, options and RSUs and an ATM program. Read them on EDGAR: the latest 10-Q · S-3 shelf filings.

Shares outstanding

489M

Nov 2024 to Aug 2026: from 227M to 489M.

From the share count on the cover of each 10-Q and 10-K, dated as each cover states.