8-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): September 3, 2025

PYROPHYTE ACQUISITION CORP. II

(Exact name of registrant as specified in its charter)

3262 Westheimer Street, Suite 706

Houston, Texas 77098

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code:

(281) 701-4243

Not Applicable(Former name or former address, if changed since last report)

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

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:

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 8.01. Other Events.

On September 3, 2025, Pyrophyte Acquisition Corp. II (the “Company”) issued a press release, a copy of which is attached as Exhibit 99.1 to this Current Report on Form 8-K, announcing that the holders of the Company’s units (the “Units”) may elect to separately trade the Class A ordinary shares, par value $0.0001 per share (the “Class A Ordinary Shares”), and warrants (the “Warrants”) included in the Units commencing on or about September 8, 2025. Each Unit consists of one Class A Ordinary Share and one-half of one redeemable Warrant to purchase one Class A Ordinary Share. Any Units not separated will continue to trade on the New York Stock Exchange under the symbol “PAII.U”, and the Class A Ordinary Shares and Warrants will separately trade on the New York Stock Exchange under the symbols “PAII” and “PAII WS,” respectively. No fractional Warrants will be issued upon separation of the Units and only whole Warrants will trade. Holders of Units will need to have their brokers contact Continental Stock Transfer & Trust Company, the Company’s transfer agent, in order to separate the Units into Class A Ordinary Shares and Warrants.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

EXHIBIT INDEX

1

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.

Dated: September 3, 2025

2

Exhibit 99.1

PyrophyteAcquisition Corp. II Announces the Separate Trading of its Class A Ordinary Shares andWarrants, Commencing on or about September 8, 2025

HOUSTON, TX, Sept. 03, 2025 (GLOBE NEWSWIRE) -- Pyrophyte Acquisition Corp. II (Nasdaq: PAII.U) (the “Company”) announced that holders of the units sold in the Company’s initial public offering of 20,041,150 units, which includes 2,541,150 units issued pursuant to the partial exercise by the underwriters of their overallotment option, completed on July 24, 2025 (the “Offering”), may elect to separately trade the Class A ordinary shares and warrants included in the units commencing on or about September 8, 2025. Any units not separated will continue to trade on the New York Stock Exchange under the symbol “PAII.U,” and each of the Class A ordinary shares and warrants will separately trade on the New York Stock Exchange under the symbols “PAII” and “PAII WS,” respectively. No fractional warrants will be issued upon separation of the units and only whole warrants will trade. Holders of units will need to have their brokers contact Continental Stock Transfer & Trust Company, the Company’s transfer agent, in order to separate the units into Class A ordinary shares and warrants.

A registration statement relating to the securities was declared effective on July 16, 2025 in accordance with Section 8(a) of the Securities Act of 1933, as amended. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

CautionaryNote Concerning Forward-Looking Statements

This press release contains statements that constitute “forward-looking statements,” including with respect to the Company’s search for an initial business combination. Forward-looking statements are subject to numerous conditions, many of which are beyond the control of the Company, including those set forth in the Risk Factors section of the Company’s registration statement for the initial public offering filed with the SEC. Copies are available on the SEC’s website, www.sec.gov. The Company undertakes no obligation to update these statements for revisions or changes after the date of this release, except as required by law.

Contact

Sten Gustafson

President and Chief Financial Officer

Pyrophyte Acquisition Corp. II

sten.gustafson@pyrophytespac.com