stocktools
Offerings // iBio, Inc.

IBIO offering history

Every offering-related filing in iBio, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 890 filings back to Mar 7, 2008.

Last executed offering
Mar 6, 2026
424B5 — priced deal (shares or notes)
Last registration (announced)
Feb 27, 2026
S-3 — capacity, not a sale
Executed, last 12 months
4
424B pricings + 8-K 3.02 sales
Registered, last 12 months
2
S-1/S-3/F-series registrations
DateFilingWhat it means
Apr 29, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Mar 6, 2026424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 6, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Feb 27, 2026S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Feb 9, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Feb 9, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 30, 2026S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jan 12, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 21, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 18, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 24, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jun 23, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 13, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Apr 30, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 30, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 30, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 11, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Feb 10, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 31, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jan 13, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jan 2, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 6, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 6, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jul 25, 2024S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Jul 3, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jun 5, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 20, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Apr 25, 2024424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Apr 24, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Apr 16, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Apr 1, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 8, 20238-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 6, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 4, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 30, 2023S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Oct 27, 2023S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Oct 4, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 14, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Aug 11, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 7, 2023S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
IBIO 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 IBIO workspace →
IBIO offering FAQ

When did IBIO last execute an offering?

Per SEC filings, iBio, Inc.'s most recent priced offering document is a 424B5 filed 2026-03-06. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did IBIO last announce or register an offering?

The most recent registration is a S-3 filed 2026-02-27. 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.