[POS AM] OBOOK HOLDINGS INC. SEC Filing

As filed with the U.S. Securities and Exchange Commission on May 7, 2026

Registration No. 333-290018

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Post-Effective Amendment No.1 to

FORM F-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

OBOOK Holdings Inc.

(Exact Name of Registrant as Specified in Its Charter)

Cayman Islands		7372		N/A
(State or other jurisdiction of incorporation or organization)		(Primary Standard Industrial Classification Code Number)		(IRS Employer Identification Number)

9F., No. 28, Wencheng Rd., Beitou Dist.,

Taipei City 112, Taiwan,

Republic of China

+886-2-6610-0180

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Cogency Global Inc.

122 East 42nd Street, 18th Floor

New York, NY 10168

800-221-0102

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies of all communications, including communications

sent to agent for service, should be sent to:

Ching-Yang Lin, Esq. Sullivan & Cromwell LLP 20th Floor, Alexandra House 18 Chater Road, Central Hong Kong +852-2826-8688 Darren Wang OBOOK Holdings Inc. 9F., No. 28, Wencheng Rd., Beitou Dist., Taipei City 112, Taiwan, Republic of China +886-2-6610-0180

Approximate date of commencement of proposed sale to the public: Not applicable,

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, please check the following box. ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933.

Emerging growth company. ☒

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, 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 7(a)(2)(B) of the Securities Act. ☐

† The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

DEREGISTRATION OF SECURITIES

On September 3, 2025, OBOOK Holdings Inc. (the “Company”) filed with the Securities and Exchange Commission (the “SEC”) a registration statement on Form F-1 (File No. 333-290018), which was originally declared effective by the SEC on September 29, 2025 (the “Registration Statement”). The Registration Statement registered the resale of 4,729,695 Class A Common Shares of the Company by the registered shareholders identified in the prospectus included in the Registration Statement. As disclosed in the Registration Statement, the Company intended to maintain the effectiveness of the Registration Statement for 90 days. Such 90-day period has lapsed, during which the Company has been subject to the reporting requirements of Section 13 or Section 15(d) of the Securities Exchange Act of 1934. Accordingly, the “current public information” requirements of Rule 144 under the Securities Act of 1933, as amended, have been satisfied as of the date hereof and, subject to compliance with the other provisions of Rule 144, the registered shareholders may be able to sell their Class A Common Shares pursuant to Rule 144.

In accordance with an undertaking made by the Company in the Registration Statement to remove by means of a post-effective amendment any of the securities registered which remain unsold at the termination of the offering, this Post-Effective Amendment No. 1 to the Registration Statement is being filed to terminate the effectiveness of the Registration Statement and to remove from registration all securities registered but not sold under the Registration Statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant has duly caused this Post-Effective Amendment No. 1 to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Taipei City, Taiwan on May 7, 2026.

OBOOK Holdings Inc.
By:		/s/ Chun-Kai Wang
		Name: Chun-Kai Wang
		Title: Chairman and Chief Executive Officer