Rosenstadt William S
- SEC CIK
- 0001461959
No open-market purchases or sales filed in the past year.
Current role at each company
- BPAC Blueport Acquisition LtdCEO and Chairmanas of Dec 8, 2025
- QBIO Q BioMed Inc.Chief Legal Officeras of May 31, 2022
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- –
- 0 filings
- Sold
- –
- 0 filings
- Net
- –
- Bought minus sold
- Companies
- 0
- With open-market trades
Trades
Every Form 4 that lists Rosenstadt William S as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
BPAC Blueport Acquisition Ltd
CEO and Chairman2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Dec 8, 2025 (view filing) | Nov 13 | 25 daysLate | Rosenstadt William SCEO and Chairman | PPurchaseClass A Ordinary Share, par value $0.0001 per share | +197.3K | – | – | +13.7%1.63M after | Duplicate filing |
| Dec 8, 2025 (view filing) | Nov 13 | 25 daysLate | Rosenstadt William SCEO and Chairman | PPurchaseClass A Ordinary Share, par value $0.0001 per share | +32.9K | – | – | –197.3K after | DerivativeDuplicate filing |