AURORA BIOSCIENCES CORP

Q: Mar 31 2001

FY: Dec 31 2000

Q: Sep 30 2000

FY: Dec 31 1999

Q: Jun 30 2000

Q: Mar 31 2000

FY: Dec 31 1999

FY: Dec 31 1999

Q: Sep 30 1999

Q: Jun 30 1999

Q: Mar 31 1999

FY: Dec 31 1998

Q: Sep 30 1998

Q: Jun 30 1998

Q: May 15 1998

FY: Dec 31 1997

Q: Sep 30 1997

Q: Aug 14 1997

5,7

7

5,7

5,7

2,7

5

7

5,7

2,7

Certification of termination of registration of a class of securities (Section 12(g))

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

PRICE T ROWE ASSOCIATES INC /MD/

PRICE T ROWE ASSOCIATES INC /MD/

KAUFMANN FUND INC

ABINGWORTH BIOVENTURES SICAV

KAUFMANN FUND INC

NEW ENTERPRISE ASSOCIATES VI L P

BIOTECHNOLOGY INVESTMENTS LTD

BIOTECHNOLOGY INVESTMENTS LTD

DOMAIN PARTNERS III L PET AL

ABINGWORTH BIOVENTURES SICAV

NEW ENTERPRISE ASSOCIATES VI L P ET AL

ABINGWORTH BIOVENTURES SICAV

BIOTECHNOLOGY INVESTMENTS LTD

DOMAIN PARTNERS III L PET AL

BB BIOTECH AG