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Mirion Technologies, Inc.MIR

Class A MIRCIK 0001809987

Cash in trust

$750M

$750,101,238

Trust per share

$10.00

Redemption value

IPO

Jul 2020

$750M raised

Combination deadline

—

Not disclosed

Filings on record

534

Latest Oct 28, 2026

Business combination

Target
Not disclosed in an indexed filing
Announced
Jun 17, 2021
Closed
Oct 25, 2021

Overview

Mirion Technologies, Inc. is a special purpose acquisition company incorporated and registered with the SEC under CIK 0001809987. It completed its initial public offering in Jul 2020, raising $750M in gross proceeds and listing on NYSE. Class A shares trade under the ticker MIR on NYSE. The vehicle is sponsored by Mirion Technologies through GS Sponsor II LLC. Business combination closed; the company trades under a new ticker.

“Our strategy is to identify and complete our initial business combination with certain industry and business characteristics.”
The mandate, as stated in the IPO prospectus

Reading the filings

Arithmetic on what Mirion Technologies, Inc. has disclosed, written the way a desk would read it. These are observations, not a rating. Nothing here scores the vehicle or implies a view on it.

  • Trust versus the $10 unit

    The trust holds $10.00 per public share, effectively the $10.00 the units were sold at, so little or no interest has accrued to the account yet.

  • Warrant coverage

    Each unit carried one-quarter warrant per unit. Warrants are dilution deferred: they cost the holder nothing until exercised, and they overhang the post-combination share count. Thinner coverage is generally a sign of a stronger book at pricing.

  • Underwriting

    Goldman Sachs led the offering. It has been named on 97 SPAC IPOs, book-running 59 of them, and 58.3% of its resolved vehicles closed a deal. The syndicate has no control over whether a sponsor finds a target, but the quality of the book at pricing shapes who ends up holding the units.

How busy it has been

Filings per month since the first one. A vehicle that has gone quiet with a deadline ahead is a different proposition from one that is still working.

331702020-042026-10

534 filings in all. 6 in the last three months, against a busiest month of 33.

News on Mirion Technologies, Inc.

Last 90 days

News sentiment

Neutral
negativeneutralpositive

Across 12 recent stories, weighted towards the newest. Scored by our own headline classifier using finance- and SPAC-specific terms. It reads what a story is about, not what the shares are worth.

SEC filing history

Free tier: filings older than 24 hours
  • 10-Q

    Quarterly report

    Accession 0001628280-26-067882

    Oct 28, 2026

    3d ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 2.02, 9.01 · Accession 0001628280-26-067591

    Oct 27, 2026

    4d ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-063985

    Sep 30, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-063983

    Sep 30, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-060095

    Sep 2, 2026

    1mo ago

    View on EDGAR ↗
  • 8-K

    Other events

    Items 8.01, 9.01 · Accession 0001628280-26-059593

    Aug 31, 2026

    2mo ago

    View on EDGAR ↗
  • 10-Q

    Quarterly report

    Accession 0001628280-26-050604

    Jul 29, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 2.02, 9.01 · Accession 0001628280-26-050171

    Jul 28, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 5.02, 9.01 · Accession 0001628280-26-046912

    Jul 2, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-046239

    Jun 30, 2026

    4mo ago

    View on EDGAR ↗
  • SD

    SD

    Accession 0001628280-26-039149

    May 29, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-035097

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-035096

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-035094

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-035092

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-035090

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-035088

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-035086

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 8-K

    Submission of matters to a vote of security holders

    Items 5.07, 9.01 · Accession 0001628280-26-035077

    May 14, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-032863

    May 8, 2026

    5mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001950047-26-004217

    May 7, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-032198

    May 7, 2026

    5mo ago

    View on EDGAR ↗
  • SCHEDULE 13G

    Beneficial ownership report (passive)

    Accession 0002100119-26-000786

    Apr 30, 2026

    6mo ago

    View on EDGAR ↗
  • 10-Q

    Quarterly report

    Accession 0001628280-26-028363

    Apr 29, 2026

    6mo ago

    View on EDGAR ↗
  • SCHEDULE 13G

    Beneficial ownership report (passive)

    Accession 0002100121-26-000502

    Apr 29, 2026

    6mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 2.02, 9.01 · Accession 0001628280-26-027943

    Apr 28, 2026

    6mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 5.02, 9.01 · Accession 0001628280-26-024837

    Apr 13, 2026

    6mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-023183

    Apr 2, 2026

    7mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-023177

    Apr 2, 2026

    7mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-023173

    Apr 2, 2026

    7mo ago

    View on EDGAR ↗

Pro

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Mirion Technologies, Inc.: questions answered

What is Mirion Technologies, Inc. (MIR)?

Mirion Technologies, Inc. is a special purpose acquisition company incorporated and registered with the SEC under CIK 0001809987. It completed its initial public offering in Jul 2020, raising $750M in gross proceeds and listing on NYSE. Class A shares trade under the ticker MIR on NYSE. The vehicle is sponsored by Mirion Technologies through GS Sponsor II LLC. Business combination closed; the company trades under a new ticker.

How much does Mirion Technologies, Inc. hold in trust?

Approximately $750,101,238, or about $10.00 per public share, as at the most recent filing on record. Trust balances move: shareholders redeem at extension votes and at the combination vote, and sponsors pay contributions in to extend. Treat the figure as a point-in-time disclosure, not a running balance.

When must Mirion Technologies, Inc. complete a merger?

No combination deadline appears in the filings we have indexed. The date is stated in the charter and repeated in each quarterly report; where our parser could not establish it with confidence we leave it blank rather than infer one.

What happens if Mirion Technologies, Inc. does not find a target in time?

The charter requires the vehicle to redeem 100% of the public shares and return the trust, pro rata, to public shareholders. That is the mechanism working as designed rather than a default. Founder shares and warrants are worthless in that outcome, which is why the sponsor's incentive is to get a deal done or to buy more time. Across the market, deadline lapsed without a deal; trust returned to public shareholders.

Can I redeem shares in Mirion Technologies, Inc., and at what price?

Public shareholders may elect to redeem in connection with a combination vote and at each extension vote, at the pro-rata trust value on the relevant record date, most recently disclosed at about $10.00 per share. Redemption is a right attached to the public shares only; warrants and rights carry no claim on the trust. The mechanics and the deadline for electing are set out in the proxy statement for the vote in question.

What tickers does Mirion Technologies, Inc. trade under?

Class A shares trade as MIR on NYSE. Units trade first and separate into their component securities roughly 52 days after the IPO; only the Class A shares carry the redemption right against the trust.

Is the trust value the same as the share price for Mirion Technologies, Inc.?

No, and the gap between them is the whole trade. Trust per share is a disclosed, contractual figure of $10.00, being what a redeeming holder receives. The market price is whatever the shares change hands at: most recently $18.37, a spread to the redemption value. Quotes on this site are delayed and indicative; confirm on your own venue before trading.

How much dilution do Mirion Technologies, Inc.'s founder shares and warrants create?

Each unit also carried one-quarter warrant per unit, which is dilution deferred until exercise. Both are disclosed in the prospectus and both survive into the combined company, which is why a de-SPAC at $10 is not economically the same as an IPO at $10.

Who sponsors Mirion Technologies, Inc., and what is their track record?

GS Sponsor II LLC is the sponsor entity, part of the Mirion Technologies franchise. This is the only vehicle we have attributed to that sponsor. Named principals: Tom Knott.

Which banks underwrote the Mirion Technologies, Inc. IPO?

Goldman Sachs, Citigroup. Goldman Sachs and Citigroup were credited as book-running managers on the cover. Syndicate membership and role are read from the prospectus cover and the underwriting section.

Is Mirion Technologies, Inc. tradeable, and where?

Yes. MIR returned a live quote of $18.37 on NYSE. Quotes here are delayed and refreshed on a schedule rather than streamed, so treat the figure as indicative and confirm on your own venue. Units and warrants trade under their own symbols and are quoted separately.

Is Mirion Technologies, Inc. a good investment?

That is not a question this site answers. Mirion Technologies, Inc. is covered here as reference data: what the company filed, when it filed it, and what the numbers in those filings say. The Edge, FOMO and Potential scores on this page are derived measures with a published formula, not ratings of investment merit: they describe the setup, and every component is shown so you can take them apart. We publish no price targets and no recommendations, and nothing here should be read as advice. The figures are a starting point for your own work, and each one carries the accession number of the filing it came from.

Where does this Mirion Technologies, Inc. data come from?

Filings Mirion Technologies, Inc. submitted to the SEC under CIK 0001809987: the registration statement and final prospectus for the structure, quarterly and annual reports for the trust, current reports and proxy statements for deals, votes and extensions. Trust economics are taken from the registrant's own XBRL tags rather than parsed from prose, which is why they are exact. Every filing in the history above is listed with its accession number, which identifies the document uniquely on EDGAR; Pro accounts open it directly from the row.

Compiled by the SPACListing research desk

Last reconciled Nov 1, 2026

Every figure on this page is read from documents the registrants filed with the U.S. Securities and Exchange Commission, principally the IPO prospectus (Form 424B4), quarterly and annual reports, current reports and proxy statements, the registrant's own XBRL tags for trust economics. Nothing is sourced from press coverage, from the companies themselves, or from a third-party aggregator. Where a filing does not disclose something, the field is left blank rather than estimated.

Read the full methodology · What is in the dataset · Report a correction

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The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.