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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1012140	Onyx Pharmaceuticals Inc	ONXX	Biological Products, (No Disgnostic Substances) (2836)	943154463

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1197018	Anthony N Coles	C/O Onyx Pharmaceuticals, Inc. 249 East Grand Ave. South San Francisco CA 94080	President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2011-03-31	15,000	$0.00	64,796	No	4	A	Direct
Common Stock	Acquisiton	2011-03-31	50,000	$0.00	114,796	No	4	A	Direct
Common Stock	Disposition	2011-04-01	12,248	$35.02	102,548	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	A	Direct
No	4	A	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (Right to Buy)	Acquisiton	2011-03-31	105,000	$0.00	105,000	$35.18

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
105,000		2021-03-31	No	4	A	Direct

Footnotes

Represents a restricted stock awarded to the reporting person. One-third of the award vests annually over three years.
Includes shares purchased through the issuer's ESPP.
Represents restricted stock units granted to the reporting person. Each restricted stock unit represents a right to receive one share of the issuer's common stock. The restricted stock unit vests upon the meeting of certain milestones.
Shares sold pursuant to a 10b5-1 plan.
12.5% of the shares subject to the option become exercisable 6 months following the date of grant. The remaining shares become exercisable in equal monthly installments over the following 42 months for a total vesting schedule of 48 months.