William S. Rosenstadt - 10 Nov 2025 Form 3 Insider Report for Blueport Acquisition Ltd (BPAC)

Role: CEO and Chairman, Director, 10%+ Owner
Signature: /s/ William Rosenstadt
Issuer symbol: BPAC
Transactions as of: 10 Nov 2025
Net transactions value: $0
Form type: 3
Filing time: 08 Dec 2025, 16:27:33 UTC
Previous filing: 31 May 2022
Next filing: 08 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Rosenstadt William S	CEO and Chairman, Director, 10%+ Owner	C/O BLUEPORT ACQUISITION LTD, 366 MADISON AVENUE, 3RD FLOOR, NEW YORK	/s/ William Rosenstadt	08 Dec 2025	0001461959

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	BPAC	Class B Ordinary Shares							10 Nov 2025	Class A Ordinary Shares	1,437,500		See Footnote	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents Class B ordinary shares held of record by Blueport Acquisition Corporation (the "sponsor"). The sponsor is managed by its two principals, William Rosenstadt and Roy Jiang, and is legally and beneficially owned (i) 50% by William Rosenstadt and (ii) 50% by Roy Jiang. By virtue of his shared control of the sponsor, William Rosenstadt may be deemed to have beneficial ownership of the ordinary shares held directly by the sponsor. The address for the sponsor is 366 Madison Avenue, 3rd Floor New York, NY 10017. Mr. Rosenstadt disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.
F2	The Class B ordinary shares will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination, or earlier at the option of the holders thereof on a one-for-one basis, subject to the adjustments. The Class B ordinary shares expire on the earlier (1) 180 days after the completion of the issuer's initial business combination; or (2) the date following the consummation of the issuer's initial business combination that results in the holder having the right to exchange their shares for cash, securities or other property

Content

Represents Class B ordinary shares held of record by Blueport Acquisition Corporation (the "sponsor"). The sponsor is managed by its two principals, William Rosenstadt and Roy Jiang, and is legally and beneficially owned (i) 50% by William Rosenstadt and (ii) 50% by Roy Jiang. By virtue of his shared control of the sponsor, William Rosenstadt may be deemed to have beneficial ownership of the ordinary shares held directly by the sponsor. The address for the sponsor is 366 Madison Avenue, 3rd Floor New York, NY 10017. Mr. Rosenstadt disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

The Class B ordinary shares will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination, or earlier at the option of the holders thereof on a one-for-one basis, subject to the adjustments. The Class B ordinary shares expire on the earlier (1) 180 days after the completion of the issuer's initial business combination; or (2) the date following the consummation of the issuer's initial business combination that results in the holder having the right to exchange their shares for cash, securities or other property