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Offerings // FibroBiologics, Inc.

FBLG offering history

Every offering-related filing in FibroBiologics, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 242 filings back to Jan 31, 2023.

Last executed offering
Oct 8, 2026
8-K — priced deal (shares or notes)
Last registration (announced)
Jul 10, 2026
S-3 — capacity, not a sale
Executed, last 12 months
12
424B pricings + 8-K 3.02 sales
Registered, last 12 months
3
S-1/S-3/F-series registrations
DateFilingWhat it means
Oct 19, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 19, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 8, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Sep 15, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jul 16, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jul 16, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jul 10, 2026S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jun 29, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 6, 2026424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 1, 2026424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 1, 2026424B4 →EXECUTEDFinal prospectus — offering priced (typical for IPOs and marketed share deals)
Mar 31, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 27, 2026S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Dec 30, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 30, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Dec 23, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Dec 15, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 15, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Nov 25, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 25, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Nov 20, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 19, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jul 18, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jun 16, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Feb 10, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Feb 7, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Feb 3, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jan 21, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 14, 2025424B4 →EXECUTEDFinal prospectus — offering priced (typical for IPOs and marketed share deals)
Jan 14, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 10, 2025S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Dec 31, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 30, 2024S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Dec 23, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 20, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 27, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 14, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 26, 2024424B4 →EXECUTEDFinal prospectus — offering priced (typical for IPOs and marketed share deals)
Jun 25, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 18, 2024S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
FBLG offering-related filings from SEC EDGAR, newest first (capped at 40). Each links to the original document.

Two honest limits. (1) A 424B takedown can price shares or notes — EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.

Is a shelf active now? →Do they need money? →Red flags →Full FBLG workspace →
FBLG offering FAQ

When did FBLG last execute an offering?

Per SEC filings, FibroBiologics, Inc.'s most recent priced offering document is a 8-K filed 2026-10-08. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did FBLG last announce or register an offering?

The most recent registration is a S-3 filed 2026-07-10. A registration is capacity to sell shares — not a sale.

Does an offering always mean dilution?

Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.

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