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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1544116	Durata Therapeutics Inc.	DRTX	Pharmaceutical Preparations (2834)	871247903

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1322927	Karl Brenton Ahrens	C/O Canaan Partners, 285 Riverside Avenue, Suite 250 Westport CT 06880		Yes	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2012-07-24	1,346,475	$0.00	1,346,475	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2012-07-24	555,555	$9.00	1,902,030	No	4	P	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See footnote
No	4	P	Indirect	See footnote

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A Preferred Stock	Disposition	2012-07-24	10,771,804	$0.00	1,346,475	$0.00
Common Stock	Stock Option (right to buy)	Acquisiton	2012-02-28	6,250	$0.00	6,250	$2.08

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Indirect
6,250		2022-02-27	No	4	A	Direct

Footnotes

The Series A Preferred Stock has no expiration date and each share of Series A Preferred Stock converted automatically into 0.125 shares of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration.
These shares are held directly by Canaan VIII L.P. Mr. Ahrens disclaims beneficial ownership of the shares owned by Canaan VIII L.P., and this report shall not be deemed an admission that such reporting person is the beneficial owner of such shares, except to the extent of his pecuniary interest, if any, in the shares by virtue of the limited liability company interests he owns in Canaan Partners VIII LLC, the general partner of Canaan VIII L.P.
This option was granted on February 28, 2012 to Mr. Ahrens with respect to 6,250 shares of common stock, vesting in 36 substantially equal monthly installments over a three year period, the first installment of which vested on March 28, 2012. Mr. Ahrens, pursuant to an agreement with Canaan Management, Inc., is contractually obligated to assign any remuneration received for service as a director to Canaan Management, Inc. Mr. Ahrens disclaims beneficial ownership in the stock options and shares exercisable therefrom, except to the extent of his pecuniary interest, if any, in such stock options and shares exercisable therefrom by virtue of the limited liability company interests he owns in Canaan Partners VIII, LLC.