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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1423824	Alder Biopharmaceuticals Inc	ALDR	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1033501	M Stephen Dow	C/O Sevin Rosen Funds 13355 Noel Road, Suite 1350 Dallas TX 75240		Yes	No	No	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	Disposition	2015-05-21	20,000	$65.69	314,203	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See Footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	19,869	Direct

Footnotes

This sale was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person.
The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share of all shares sold on this date. The actual sale prices per share range from $65.35 - $66.09.
Total common shares of 314,203 represents 256,703 common shares held by the Dow Family Trust ("Dow Trust"), 50,000 shares held by Dow Investments II L.P. ("Dow Investments") and 7,500 shares held by Dow Investments L.P. ("Dow L.P."). The Dow Trust is the General Partner of Dow Investments. Steve Dow ("Dow") is a trustee and beneficiary of the Dow Trust. Dow is a general partner of Dow L.P. and is deemed to have sole dispositive power over the shares with no pecuniary interest.