Rosenstadt William S's Form 4 filing
Blueport Acquisition Ltd (BPAC) · filed Dec 8, 2025
- Accession no.
- 0001185185-25-001967
- Filed
- Dec 8, 2025
- Trade date
- Nov 13, 2025
- Filing delay
- 25 daysLate
- Rule 10b5-1 plan
- Not checked
This filing lists 1 non-derivative transaction and 1 derivative transaction. It was filed 25 days after the trade, past the 2-business-day deadline.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Rosenstadt William SCIK 0001461959 | Director, Officer (CEO and Chairman), 10% Owner |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Nov 13, 2025 | Class A Ordinary Share, par value $0.0001 per share | PPurchaseAcquired | +197,250 | –F1 | – | 1,634,750 | Indirect | Duplicate filing |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Nov 13, 2025 | Class A Ordinary Share, par value $0.0001 per share | PPurchaseAcquired | +32,875 | –F2 | – | 197,250 | Indirect | Duplicate filing |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F1
Reflects the 197,250 private units owned by Blueport Acquisition Corporation, the Issuer's sponsor (the "sponsor"). Each private unit consists of one Class A ordinary share, and one right to receive one-sixth (1/6th) of one Class A ordinary share upon the consummation of the Issuer's initial business combination. The private units were purchased at $10.00 per unit for an aggregate purchase price of $ 1,972,500. 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 their shared control of our sponsor, William Rosenstadt and Roy Jiang may be deemed to have beneficial ownership of the shares held directly by our sponsor. The address for the sponsor is 366 Madison Avenue, 3rd Floor New York, NY 10017. Mr. Rosenstadt disclaims any beneficial ownership of the shares held by the sponsor, except to the extent of his pecuniary interest therein.
Referenced by the price of 1 transaction in Table I.
- F2
The rights convert automatically into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination. If the business combination has not been consummated within the applicable time period specified in the Issuer's Amended and Restated Memorandum and Articles of Association, the rights shall expire and shall be worthless.
Referenced by the price of 1 transaction in Table II.