Offerings // Theriva Biologics, Inc.

TOVX offering history

Every offering-related filing in Theriva Biologics, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,000 filings back to May 15, 1998.

Last executed offering
Dec 3, 2025
424B5 — priced deal (shares or notes)
Last registration (announced)
Nov 7, 2025
S-3 — capacity, not a sale
Executed, last 12 months
8
424B pricings + 8-K 3.02 sales
Registered, last 12 months
1
S-1/S-3/F-series registrations
DateFilingWhat it means
Dec 3, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 2, 2025EFFECTEFFECTIVESEC declared a registration effective — selling can begin
Nov 7, 2025S-3REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Oct 29, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 24, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 17, 20258-KEXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Oct 16, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 16, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 16, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 16, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 20, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 8, 2025424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 7, 2025EFFECTEFFECTIVESEC declared a registration effective — selling can begin
Mar 21, 2025S-1/AREGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Jan 21, 2025S-1/AREGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Dec 10, 2024S-1REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Sep 27, 2024424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 26, 2024424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 25, 2024EFFECTEFFECTIVESEC declared a registration effective — selling can begin
Sep 25, 2024EFFECTEFFECTIVESEC declared a registration effective — selling can begin
Sep 23, 2024S-1/AREGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
Sep 11, 2024S-3/AREGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Sep 10, 2024S-1REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
May 2, 2024S-3REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Dec 8, 2022EFFECTEFFECTIVESEC declared a registration effective — selling can begin
Dec 5, 2022424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 16, 2022424B3UPDATEProspectus update — often a resale registration, not necessarily new capital
Sep 14, 2022EFFECTEFFECTIVESEC declared a registration effective — selling can begin
Sep 6, 2022S-3REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jul 29, 20228-KEXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Mar 11, 20228-KEXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 14, 20218-KEXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Nov 3, 2021424B3UPDATEProspectus update — often a resale registration, not necessarily new capital
Nov 2, 2021EFFECTEFFECTIVESEC declared a registration effective — selling can begin
Oct 22, 2021S-3REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
May 11, 2021EFFECTEFFECTIVESEC declared a registration effective — selling can begin
May 3, 2021S-3REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Feb 19, 2021424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 10, 20218-KEXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Feb 10, 2021424B5EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
TOVX 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 TOVX workspace →
TOVX offering FAQ

When did TOVX last execute an offering?

Per SEC filings, Theriva Biologics, Inc.'s most recent priced offering document is a 424B5 filed 2025-12-03. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did TOVX last announce or register an offering?

The most recent registration is a S-3 filed 2025-11-07. 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.