William S. Rosenstadt
CIK: 0001461959
Transaction Breakdown
Open Market Buys (P)1 (100.0%)
High conviction signal
Open Market Sales (S)0 (0.0%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)0 (0.0%)
Compensation grants
Other (G, F, J, C, D, …)0 (0.0%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
BPAC
Blueport Acquisition Ltd
DirectorOfficer10% Owner
Discretionary Trading P&L
Holdings
About Rosenstadt William S
Rosenstadt William S (SEC CIK 0001461959) files insider reports with the SEC as CEO and Chairman of Blueport Acquisition Ltd (BPAC).
Signal8 holds 2 ownership filings by Rosenstadt William S (1 Form 3, 1 Form 4), filed on Dec 8, 2025. Those filings report 1 transaction, the latest on Nov 13, 2025. Signal8's Form 4 history starts in Sep 2024.
The business address on Rosenstadt William S's filings is in NEW YORK, NY.
Recent filings by Rosenstadt William S
- Nov 13, 2025: Open-market purchase of BPAC shares (Form 4, code P).
Other insiders filing for Blueport Acquisition Ltd (BPAC)
- Jiang Roy, 10% Owner
- Blueport Acquisition Corp, 10% Owner
- Sanders Steven Andrew, Director
- Silverman Scott J, Director
- Sandher Kulwant, Chief Financial Officer
- Yieh Yarona L, Director