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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
1282660	R Julianna Wood	C/O Onyx Pharmaceuticals, Inc. 249 E. Grand Ave. South San Francisco CA 94080	Vp, Public Affairs	No	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	2013-04-10	547	$35.18	19,921	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	220	$28.55	20,141	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	1,198	$37.68	21,339	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	619	$30.28	21,958	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	600	$28.55	22,558	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	146	$30.28	22,704	No	4	M	Direct
Common Stock	Disposition	2013-04-10	3,330	$95.00	19,374	No	4	S	Direct
Common Stock	Acquisiton	2013-04-10	510	$30.28	19,884	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	440	$28.55	20,324	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	1,437	$37.68	21,761	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	3,645	$35.18	25,406	No	4	M	Direct
Common Stock	Acquisiton	2013-04-10	586	$28.55	25,992	No	4	M	Direct
Common Stock	Disposition	2013-04-10	6,618	$95.00	19,374	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	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)	Disposition	2013-04-10	547	$0.00	547	$35.18
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	3,645	$0.00	3,645	$35.18
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	220	$0.00	220	$28.55
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	600	$0.00	600	$28.55
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	440	$0.00	440	$28.55
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	586	$0.00	586	$28.55
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	1,198	$0.00	1,198	$37.68
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	1,437	$0.00	1,437	$37.68
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	619	$0.00	619	$30.28
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	146	$0.00	146	$30.28
Common Stock	Stock Option (Right to Buy)	Disposition	2013-04-10	510	$0.00	510	$30.28

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
12,760	2021-03-31	No	4	M	Direct
9,115	2021-03-31	No	4	M	Direct
2,173	2019-03-31	No	4	M	Direct
1,573	2019-03-31	No	4	M	Direct
1,133	2019-03-31	No	4	M	Direct
547	2019-03-31	No	4	M	Direct
19,166	2022-03-29	No	4	M	Direct
17,729	2022-03-29	No	4	M	Direct
7,291	2020-03-31	No	4	M	Direct
7,145	2020-03-31	No	4	M	Direct
6,635	2020-03-31	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	200	Indirect	Children's Trust

Footnotes

Shares sold pursuant to a 10b5-1 plan.
The shares were sold at prices ranging from $95.00 to $95.08. The reporting person will provide upon request to the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price.
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.