SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* BVF PARTNERS L P/IL (Last) (First) (Middle) 900 N. MICHIGAN AVE., SUITE 1100 (Street) CHICAGO IL 60611 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol DYNAVAX TECHNOLOGIES CORP [ DVAX ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 09/10/2009
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/10/2009		S		296,106(1)	D	$2.7646	5,194,851	D(2)
Common Stock	09/10/2009		S		205,000(1)	D	$2.7646	4,989,851	D(3)
Common Stock	09/10/2009		S		711,000(1)	D	$2.7646	4,278,851	D(4)
Common Stock								4,278,851	I(5)	General partner and manager of entities with direct ownership.
Common Stock								4,278,851	I(6)	General Partner of entity with indirect ownership.
Common Stock								4,278,851	I(7)	Sole shareholder and sole director of entity with indirect ownership.

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* BVF PARTNERS L P/IL (Last) (First) (Middle) 900 N. MICHIGAN AVE., SUITE 1100 (Street) CHICAGO IL 60611 (City) (State) (Zip)

1. Name and Address of Reporting Person* BIOTECHNOLOGY VALUE FUND L P (Last) (First) (Middle) 900 N. MICHIGAN AVE., SUITE 1100 (Street) CHICAGO IL 60611 (City) (State) (Zip)

1. Name and Address of Reporting Person* BIOTECHNOLOGY VALUE FUND II LP (Last) (First) (Middle) 900 N. MICHIGAN AVE., SUITE 1100 (Street) CHICAGO IL 60611 (City) (State) (Zip)

1. Name and Address of Reporting Person* BVF INVESTMENTS LLC (Last) (First) (Middle) 900 N. MICHIGAN AVE., SUITE 1100 (Street) CHICAGO IL 60611 (City) (State) (Zip)

1. Name and Address of Reporting Person* LAMPERT MARK N (Last) (First) (Middle) 900 N. MICHIGAN AVE., SUITE 1100 (Street) CHICAGO IL 60611 (City) (State) (Zip)

1. Name and Address of Reporting Person* BVF INC/IL (Last) (First) (Middle) 900 N. MICHIGAN AVE., SUITE 1100 (Street) CHICAGO IL 60611 (City) (State) (Zip)

Explanation of Responses:

1. Units may represent aggregation of daily trade activity. Details regarding individual execution amounts and prices are available upon request.

2. Shares directly beneficially owned by Biotechnology Value Fund, L.P. ("BVF")

3. Shares directly beneficially owned by Biotechnology Value Fund II, L.P. ("BVF II")

4. The shares of Common Stock are directly beneficially owned by BVF Investments, LLC ("BVFLLC"), a Delaware limited liability company. Pursuant to the operating agreement of BVFLLC, BVF Partners, L.P., a Delaware limited partnership ("Partners") is authorized, among other things, to invest the contributed capital of Samana Capital, L.P., the majority member of BVFLLC, in the shares of Common Stock and other securities and to vote, exercise or convert and dispose of such securities and is entitled to receive fees based on assets under management and, subject to certain exceptions, allocations based on realized and unrealized gains on such assets.

5. The shares of Common Stock are indirectly beneficially owned by Partners. Partners is the general partner of BVF and BVF II and is the manager of BVFLLC.

6. The shares of Common Stock are indirectly beneficially owned by BVF Inc., a Delaware corporation ("BVF Inc."). BVF Inc. is the general partner of Partners.

7. Mark N. Lampert is the sole shareholder, sole director, and an officer of BVF Inc.

Remarks:

	BVF Partners L.P., By: BVF Inc., its GP, By: /s/ Mark N. Lampert	09/11/2009
	BIOTECHNOLOGY VALUE FUND, L.P. By: BVF Partners L.P., its GP, By: BVF Inc., By: /s/ Mark N. Lampert	09/11/2009
	BIOTECHNOLOGY VALUE FUND II, L.P., By: BVF Partners L.P., its GP, By: BVF Inc., By: /s/ Mark N. Lampert	09/11/2009
	BVF INVESTMENTS, L.L.C., By: BVF Partners L.P., its Manager, By: BVF Inc., By: /s/ Mark N. Lampert	09/11/2009
	BVF INC., By: /s/ Mark N. Lampert	09/11/2009
	MARK N. LAMPERT By: /s/ Mark N. Lampert	09/11/2009
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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).
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