Offerings // SOLIGENIX, INC.

SNGX offering history

Every offering-related filing in SOLIGENIX, INC.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,001 filings back to Dec 3, 2008.

Last executed offering

Jun 26, 2026

424B5 — priced deal (shares or notes)

Last registration (announced)

Sep 19, 2025

S-1 — capacity, not a sale

Executed, last 12 months

424B pricings + 8-K 3.02 sales

Registered, last 12 months

S-1/S-3/F-series registrations

Date	Filing		What it means
Aug 7, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 7, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 7, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 7, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jun 26, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 28, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 8, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 8, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 8, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 8, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Apr 2, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 2, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 2, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 2, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jan 23, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 7, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 7, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 7, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 26, 2025	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Sep 25, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Sep 19, 2025	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Aug 15, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 15, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 15, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Mar 26, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 26, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 26, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 8, 2024	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 8, 2024	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 8, 2024	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 16, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 9, 2024	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 9, 2024	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 2, 2024	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jul 24, 2024	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Jul 9, 2024	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
May 10, 2024	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Apr 19, 2024	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Apr 15, 2024	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 2, 2024	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet

SNGX 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 SNGX workspace →

SNGX offering FAQ

When did SNGX last execute an offering?

Per SEC filings, SOLIGENIX, INC.'s most recent priced offering document is a 424B5 filed 2026-06-26. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did SNGX last announce or register an offering?

The most recent registration is a S-1 filed 2025-09-19. 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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