Exhibit 99.1

JOINT FILING AGREEMENT

This Joint Filing Agreement, dated as of August 14, 2025 is by and among Sandia Investment Management L.P. and Timothy J. Sichler (the foregoing are collectively referred to herein as the “Filers”).

Each of the Filers may be required to file with the United States Securities and Exchange Commission a statement on Schedule 13D and/or 13G with respect to Class A Ordinary Shares of Crown PropTech Acquisitions beneficially owned by them from time to time.

Pursuant to and in accordance with Rule 13(d)(1)(k) promulgated under the Securities Exchange Act of 1934, as amended, the Filers hereby agree to file a single statement on Schedule 13G and/or 13D (and any amendments thereto) on behalf of each of such parties, and hereby further agree to file this Joint Filing Agreement as an exhibit to such statement, as required by such rule.

This Joint Filing Agreement may be terminated by any of the Filers upon one week’s prior written notice or such lesser period of notice as the Filers may mutually agree.

Executed and delivered as of the date first above written.

	Sandia Investment Management L.P.

	By: /s/ Thomas J. Cagna
	Name: Thomas J. Cagna
	Title: Chief Operating Officer


	Timothy J. Sichler

	/s/ Timothy J. Sichler
	Timothy J. Sichler

Crown PropTech Acquisitions SCHEDULE 13G