DYNAVAX TECHNOLOGIES CORP — Director's Dealing 2013

Jan 17, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DYNAVAX TECHNOLOGIES CORP (DVAX)
CIK: 0001029142
Period of Report: 2013-01-15

Reporting Person: TUCK STEPHEN F (VP, Global Technical Ops)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-01-15	Common Stock	M	50000	$1.50	Acquired	130823	Direct
2013-01-15	Common Stock	F	24672	$3.04	Disposed	106151	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-01-15	Stock Option	$1.50	M	50000	Disposed	2013-01-21	Common stock (50000)	Direct

Footnotes

F1: On January 15, 2013, Mr. Tuck exercised certain of his outstanding options. No shares were sold in the market in connection with this exercise.

F2: Shares withheld by Registrant to satisfy minimum statutory withholding requirements.

F3: This Stock Option was granted on January 22, 2003 with an expiration of January 21, 2013 and vested over a four-year period after the date of the grant.

F4: Not applicable.