Offerings // CECO ENVIRONMENTAL CORP

CECO offering history

Every offering-related filing in CECO ENVIRONMENTAL CORP’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,000 filings back to Mar 25, 2008.

Last executed offering

Nov 6, 2014

8-K — priced deal (shares or notes)

Last registration (announced)

Oct 28, 2025

S-3ASR — 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
Apr 23, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Apr 22, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Oct 28, 2025	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
May 12, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 2, 2022	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Oct 14, 2020	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 3, 2019	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 24, 2019	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jul 31, 2015	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jul 31, 2015	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 6, 2014	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 25, 2013	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jul 25, 2013	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 4, 2013	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Dec 1, 2009	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Aug 15, 2008	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Aug 4, 2008	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)

CECO 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 CECO workspace →

CECO offering FAQ

When did CECO last execute an offering?

Per SEC filings, CECO ENVIRONMENTAL CORP's most recent priced offering document is a 8-K filed 2014-11-06. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did CECO last announce or register an offering?

The most recent registration is a S-3ASR filed 2025-10-28. 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.