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Possible new SPTX shares

SPTXDilution

Known so far: no new shares from the prospectus covers read · no effective shelf · not yet read: warrants, converts, ATM.

Shelf room

  • Room today none, no effective shelf
How this is worked out

Shelf room: none. No shelf registration on EDGAR was declared effective in the last 3 years, so a sale needs a new registration or a private placement.

What could become new Seaport Therapeutics (SPTX) shares: options and RSUs, each with the 10-Q, 10-K, S-1 or 424B filing it comes from.

SPTX dilution ladder

Every source of new shares on record, from the filings that created it.

53.5M outstanding; up to 65.8M fully diluted, +23%

  1. Outstandingas of Oct 27, 2026 (10-Q filed Nov 2) · share count on the cover page
    53.5M
  2. Options and RSUs12.3M options10-Q Nov 2, 2026 · equity note
    +12.3M

Not stated in the filings we read: an ATM program, warrants, convertible notes.

Counts, sizes and prices as stated in each filing; the fully diluted count is arithmetic on them. Dollars become shares only at a price a filing states. Not advice.

Financing terms to know

None found in filings since Nov 2, 2026.

Each term is quoted from the exhibit it comes from; numbers are as stated in the filing. A flag describes a financing term. It is not investment advice.

Shares outstanding

53.5M

Jun 2026 to Oct 2026: from 53.5M to 53.5M.

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