FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   SRB Associates IX L.P. 2. Date of Event Requiring Statement (Month/Day/Year) 05/07/2014 3. Issuer Name and Ticker or Trading Symbol ALDER BIOPHARMACEUTICALS INC [ALDR] (Last) (First) (Middle) 13455 NOEL ROAD, SUITE 1670 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) DALLAS, TX 75240 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series B Preferred Stock	  (1)	  (1)	Common Stock	2,220,196	$ (1)	I	See Footnote (2)
Series A Preferred Stock	  (1)	  (1)	Common Stock	1,773,736	$ (1)	I	See Footnote (3)
Series C Preferred Stock	  (1)	  (1)	Common Stock	925,925	$ (1)	I	See Footnote (4)
Series D Preferred Stock	  (1)	  (1)	Common Stock	265,117	$ (1)	I	See Footnote (5)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SRB Associates IX L.P. 13455 NOEL ROAD, SUITE 1670 DALLAS, TX 75240	Â	  X	Â	Â
Sevin Rosen Fund IX L.P. 13455 NOEL ROAD, SUITE 1670 DALLAS, TX 75240	Â	  X	Â	Â
Sevin Rosen IX Affiliates Fund L.P. 13455 NOEL ROAD, SUITE 1670 DALLAS, TX 75240	Â	  X	Â	Â

Signatures

John V. Jaggers, As Attorney-In-Fact For SRB Associates IX L.P.		05/07/2014
**Signature of Reporting Person		Date
John V. Jaggers, As Attorney-In-Fact For Sevin Rosen Fund IX L.P.		05/07/2014
**Signature of Reporting Person		Date
John V. Jaggers, As Attorney-In-Fact For Sevin Rosen IX Affiliates Fund L.P.		05/07/2014
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock automatically converts into Common Stock on a 1-for- 5.5 basis immediately prior to the closing of the Issuer's initial public offering of common stock and has no expiration date.
(2)	Total Series A Preferred shares of 2,220,196 represents 2,176,903 shares owned directly by Sevin Rosen Fund IX L.P. ("SRFIX") 43,293 shares owned directly by Sevin Rosen IX Affiliates Fund L.P. ("SRIX AFF"). SRB Associates IX L.P. ("SRBAIX") is the general partner of SRFIX and SRIX AFF, and in that capacity has shared voting and dispositive power over such shares. SRBAIX disclaims beneficial ownership of such shares except to the extent of its pecuniary interest.
(3)	Total Series B Preferred shares of 1,773,736 represents 1,739,149 shares owned directly by SRFIX 34,587 shares owned directly by SRIX AFF. SRBAIX is the general partner of SRFIX and SRIX AFF, and in that capacity has shared voting and dispositive power over such shares. SRBAIX disclaims beneficial ownership of such shares except to the extent of its pecuniary interest.
(4)	Total Series C Preferred shares of 925,925 represents 907,870 shares owned directly by SRFIX and 18,055 shares owned directly by SRIX AFF. SRBAIX is the general partner of SRFIX and SRIX AFF, and in that capacity has shared voting and dispositive power over such shares. SRBAIX disclaims beneficial ownership of such shares except to the extent of its pecuniary interest.
(5)	Total Series D Preferred shares of 265,117 represents 259,948 shares owned directly by SRFIX and 5,169 shares owned directly by SRIX AFF. SRBAIX is the general partner of SRFIX and SRIX AFF, and in that capacity has shared voting and dispositive power over such shares. SRBAIX disclaims beneficial ownership of such shares except to the extent of its pecuniary interest.

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