Offerings // Mirion Technologies, Inc.

MIR offering history

Every offering-related filing in Mirion Technologies, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 528 filings back to Apr 20, 2020.

Last executed offering

Sep 30, 2025

8-K — priced deal (shares or notes)

Last registration (announced)

Nov 17, 2022

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
Sep 30, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 29, 2025	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 26, 2025	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Sep 24, 2025	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 24, 2025	FWP →	MARKETING	Free-writing prospectus — offering being marketed
May 23, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jun 4, 2024	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jun 4, 2024	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 15, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 6, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 21, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 28, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 28, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 17, 2022	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Nov 3, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Oct 3, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 19, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 1, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jun 17, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 23, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 5, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Mar 11, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Mar 10, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 8, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Mar 3, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Mar 1, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Feb 23, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Dec 29, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Dec 13, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 12, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 10, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 4, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 4, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Oct 27, 2021	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Oct 25, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 29, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 29, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jun 21, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 1, 2020	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Jun 29, 2020	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin

MIR 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 MIR workspace →

MIR offering FAQ

When did MIR last execute an offering?

Per SEC filings, Mirion Technologies, Inc.'s most recent priced offering document is a 8-K filed 2025-09-30. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did MIR last announce or register an offering?

The most recent registration is a S-3 filed 2022-11-17. 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.