A statement of beneficial ownership of common stock by certain persons

A statement of beneficial ownership of common stock by certain persons

A statement of beneficial ownership of common stock by certain persons

Securities offered to employees pursuant to employee benefit plans

Pre-effective amendment to an S-3 filing

Simplified registration form

Quarterly report which provides a continuing view of a company's financial position

Report of unscheduled material events or corporate event

Quarterly report which provides a continuing view of a company's financial position

Quarterly report which provides a continuing view of a company's financial position