Offerings // HUDSON TECHNOLOGIES INC /NY

HDSN offering history

Every offering-related filing in HUDSON TECHNOLOGIES INC /NY’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,001 filings back to Sep 6, 2005.

Last executed offering

Dec 9, 2016

424B5 — priced deal (shares or notes)

Last registration (announced)

Dec 16, 2025

S-3 — 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
Jan 7, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 16, 2025	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jan 23, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jan 13, 2023	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jan 12, 2021	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Jan 12, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 23, 2020	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Apr 27, 2018	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Apr 27, 2018	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 19, 2018	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Dec 9, 2016	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 8, 2016	S-3MEF →	REGISTERED	S-3MEF registration — capacity to sell shares, not a sale yet
Dec 5, 2016	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 18, 2015	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Dec 18, 2015	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 12, 2015	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jun 6, 2014	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 5, 2014	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 22, 2013	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jan 22, 2013	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jan 11, 2013	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Dec 14, 2012	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Aug 1, 2012	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 1, 2012	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jul 3, 2012	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jul 2, 2010	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jul 31, 2009	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 9, 2008	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 5, 2008	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Sep 3, 2008	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Aug 22, 2008	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Jul 30, 2008	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Jun 26, 2008	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet

HDSN 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 HDSN workspace →

HDSN offering FAQ

When did HDSN last execute an offering?

Per SEC filings, HUDSON TECHNOLOGIES INC /NY's most recent priced offering document is a 424B5 filed 2016-12-09. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did HDSN last announce or register an offering?

The most recent registration is a S-3 filed 2025-12-16. 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.