Offerings // Ideal Power Inc.

IPWR offering history

Every offering-related filing in Ideal Power Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 443 filings back to Dec 22, 2010.

Last executed offering

May 18, 2026

424B5 — priced deal (shares or notes)

Last registration (announced)

Jul 10, 2026

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
Jul 17, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jul 10, 2026	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
May 18, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 3, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 27, 2026	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Feb 25, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 25, 2026	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Feb 23, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 9, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 30, 2025	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Mar 27, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 25, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 25, 2024	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Jan 9, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 29, 2022	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Feb 10, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 8, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 2, 2020	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 20, 2020	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Sep 8, 2020	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 8, 2020	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Aug 28, 2020	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Aug 3, 2020	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Dec 23, 2019	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Dec 20, 2019	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 13, 2019	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Nov 13, 2019	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Apr 21, 2017	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 31, 2017	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Feb 27, 2017	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
May 18, 2015	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 14, 2015	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 27, 2015	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 1, 2014	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Nov 27, 2013	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 25, 2013	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Nov 25, 2013	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Nov 21, 2013	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 18, 2013	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Nov 12, 2013	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet

IPWR 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 IPWR workspace →

IPWR offering FAQ

When did IPWR last execute an offering?

Per SEC filings, Ideal Power Inc.'s most recent priced offering document is a 424B5 filed 2026-05-18. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did IPWR last announce or register an offering?

The most recent registration is a S-3 filed 2026-07-10. 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.