UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): June 17, 2021

GS Acquisition Holdings Corp II

(Exact name of registrant as specified in its charter)

Delaware |  | 001-39352 |  | 83-0974996
(State or other jurisdiction of incorporation) |  | (Commission File Number) |  | (I.R.S. Employer Identification No.)
200 West Street New York, New York |  | 10282
(Address of principal executive offices) |  | (Zip Code)

(212) 902-1000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☒ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Units, each consisting of one share of Class A common stock and one-quarter of one redeemable warrant |  | GSAH.U |  | New York Stock Exchange
Class A common stock, par value $0.0001 per share |  | GSAH |  | New York Stock Exchange
Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 |  | GSAH WS |  | New York Stock Exchange
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01 Entry into a Material Definitive Agreement.

On June 17, 2021, GS Acquisition Holdings Corp II, a Delaware corporation (the “Company”), announced that it entered into a Business Combination Agreement (the “Agreement”), dated as of June 17, 2021, by and among the Company, Mirion Technologies (TopCo), Ltd., a Jersey private company limited by shares (“Mirion”), CCP IX LP No. 1, CCP IX LP No. 2, CCP IX Co-Investment LP and CCP IX Co-Investment No. 2 LP (collectively, the “Charterhouse Parties”), each acting by their general partner, Charterhouse General Partners (IX) Limited, for the limited purpose set forth therein, each of the other persons set forth on Annex I thereto (together with the Charterhouse Parties, the “Supporting Mirion Holders”) and the other holders of existing shares of Mirion who become a party thereto by executing a joinder agreement (each, a “Joining Seller” and collectively, the “Joining Sellers” and, together with each Supporting Mirion Holder, each, a “Seller,” and collectively, the “Sellers”).

Pursuant to the terms of the Agreement, the parties thereto will enter into a business combination transaction (the “Business Combination”) pursuant to which Mirion will combine with a subsidiary of the Company.

The proposed Business Combination is expected to be consummated after the required approval by the stockholders of the Company and the satisfaction of certain other conditions described in the Agreement.

Item 7.01 Regulation FD Disclosure.

On June 17, 2021, the Company issued a press release (the “Press Release”) announcing the Business Combination. The Press Release is attached hereto as Exhibit 99.1 and incorporated by reference herein.

Attached as Exhibit 99.2 and incorporated by reference herein is an investor presentation dated June 2021, that will be used by the Company with respect to the Business Combination.

Forward-Looking Statements

This Current Report contains “forward-looking statements” within the meaning of The Private Securities Litigation Reform Act of 1995. Forward-looking statements include, without limitation, statements regarding the estimated future financial performance, financial position and financial impacts of the potential transaction, the satisfaction of closing conditions to the potential transaction and the PIPE Investment (as defined in the Agreement), the level of redemptions by the Company’s public stockholders and purchase price adjustments in connection with the potential transaction, the timing of the completion of the potential transaction, the anticipated pro forma enterprise value and Adjusted EBITDA of the combined company following the potential transaction, anticipated ownership percentages of the combined company’s stockholders following the potential transaction, and the business strategy, plans and objectives of management for future operations, including as they relate to the potential transaction. Such statements can be identified by the fact that they do not relate strictly to historical or current facts. When used in this Current Report, words such as “pro forma,” “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “strive,” “would” and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. When the Company or Mirion discusses its strategies or plans, including as they relate to the potential transaction, it is making projections, forecasts and forward-looking statements. Such statements are based on the beliefs of, as well as assumptions made by and information currently available to, the Company’s or Mirion’s management.

These forward-looking statements involve significant risk and uncertainties that could cause the actual results to differ materially from the expected results. Most of these factors are outside the Company and Mirion’s control and are difficult to predict. Factors that may cause such differences include, but are not limited to: (1) the Company’s ability to complete the potential transaction or, if the Company does not complete the potential transaction or any other initial business combination; (2) satisfaction or waiver (if applicable) of the conditions to the potential transaction, including with respect to the approval of the stockholders of the Company; (3) the ability to maintain the listing of the combined company’s securities on the New York Stock Exchange; (4) the inability to complete the PIPE Investment; (5) the risk that the proposed transaction disrupts current plans and operations of the Company or Mirion as a result of the announcement and consummation of the transaction described herein; (6) the ability to recognize the anticipated benefits of the proposed transaction, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably, maintain relationships with customers and suppliers and retain its management and key employees; (7) costs related to the proposed transaction; (8) changes in applicable laws or regulations and delays in obtaining, adverse conditions contained in, or the inability to obtain necessary regulatory approvals required to complete the potential transaction; (9) the possibility that the Company and Mirion may be adversely affected by other economic, business and/or competitive factors; (10) the outcome of any legal proceedings that may be instituted against Company and Mirion or any of their respective directors or officers, following the announcement of the potential transaction; (11) the failure to realize anticipated pro forma results or projections and underlying assumptions, including with respect to estimated stockholder redemptions and purchase price and other adjustments; (12) future global, regional or local political, market and social conditions, including due to the COVID-19 pandemic; and (13) other risks and uncertainties indicated from time to time in the preliminary proxy statement/prospectus of the Company, including those under “Risk Factors” therein, and other documents filed or to be filed with the SEC by the Company.

Forward-looking statements included in this Current Report speak only as of the date of this Current Report. Neither the Company nor Mirion undertakes any obligation to update its forward-looking statements to reflect events or circumstances after the date of this Current Report. Additional risks and uncertainties are identified and discussed in the Company’s reports filed with the SEC and available at the SEC’s website at http://www.sec.gov.

Additional Information about the Transaction and Where to Find It

In connection with the proposed Business Combination, a registration statement on Form S-4 is expected to be filed by the Company with the SEC. The Form S-4 will include preliminary and definitive proxy statements to be distributed to holders of the Company’s common stock in connection with the solicitation for proxies for the vote by the Company’s stockholders in connection with the proposed Business Combination and other matters as described in the Form S-4, as well as a prospectus relating to the offer of the securities to be issued in connection with the completion of the proposed Business Combination. The Company and Mirion urge investors, stockholders and other interested persons to read, when available, the Form S-4, including the proxy statement/prospectus included therein, as well as other documents filed with the SEC in connection with the proposed Business Combination, as these materials will contain important information about the Company, Mirion and the proposed Business Combination. After the Form S-4 has been filed and declared effective, the definitive proxy statement/prospectus will be mailed to the Company’s stockholders as of a record date to be established for voting on the proposed Business Combination. Stockholders will also be able to obtain copies of such documents, without charge, once available, at the SEC’s website at www.sec.gov, or by directing a request to: IR-GSacquisition@gs.com.

Participants in the Solicitation

The Company and Mirion and their respective directors and officers may be deemed participants in the solicitation of proxies of the Company’s stockholders in connection with the proposed Business Combination. The Company’s stockholders and other interested persons may obtain, without charge, more detailed information regarding the directors and officers of the Company in the Company’s Annual Report on Form 10-K/A for the fiscal year ended December 31, 2020, which was filed with the SEC on May 17, 2021.

Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of proxies to the Company’s stockholders in connection with the proposed Business Combination and other matters to be voted upon at the special meeting of the Company’s stockholders will be set forth in the proxy statement/prospectus for the proposed Business Combination when available. Additional information regarding the interests of participants in the solicitation of proxies in connection with the proposed Business Combination will be included in the preliminary proxy statement/prospectus that the Company intends to file with the SEC.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

The Exhibit Index is incorporated by reference herein.

Exhibit No. |  | Description of Exhibits
99.1 |  | Press Release dated June 17, 2021
99.2 |  | Investor Presentation dated June 2021

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

|  |  |  | GS Acquisition Holdings Corp II
Date: June 17, 2021 |  |  |  | By: |  | /s/ Tom Knott
|  |  |  | Name: |  | Tom Knott
|  |  |  | Title: |  | Chief Executive Officer, Chief Financial Officer and Secretary