SEC FORM 3 SEC Form 3
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
or Section 30(h) of the Investment Company Act of 1940
 
OMB APPROVAL
OMB Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*
CORCORAN KEVIN P

(Last) (First) (Middle)
PACIFIC BIOSCIENCES OF CALIFORNIA, INC.
1380 WILLOW ROAD

(Street)
MENLO PARK CA 94025

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
03/27/2012
3. Issuer Name and Ticker or Trading Symbol
PACIFIC BIOSCIENCES OF CALIFORNIA INC [ PACB ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
SVP, Market Development
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
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)
Common Stock 8,049 D
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: 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
Stock Option (right to buy) (1) 11/26/2017 Common Stock 112,500 1.96 D
Stock Option (right to buy) (2) 09/17/2018 Common Stock 37,500 6.96 D
Stock Option (right to buy) (3) 02/17/2020 Common Stock 50,000 8.5 D
Stock Option (right to buy) (4) 07/29/2020 Common Stock 12,500 12.74 D
Stock Option (right to buy) (5) 03/15/2021 Common Stock 150,000 14.24 D
Stock Option (right to buy) (6) 02/15/2022 Common Stock 250,000 4.79 D
Explanation of Responses:
1. The shares subject to the option are fully vested and exercisable.
2. 1/5th of the shares subject to the option vested on June 1, 2009 and the balance of the shares have vested and will vest monthly thereafter over the next four years, provided that the Reporting Person continues to serve through each vesting date.
3. 1/5th of the shares subject to the option vested on June 1, 2010 and the balance of the shares have vested and will vest monthly thereafter over the next four years, provided that the Reporting Person continues to serve through each vesting date.
4. 1/5th of the shares subject to the option vested on June 1, 2011 and the balance of the shares have vested and will vest monthly thereafter over the next four years, provided that the Reporting Person continues to serve through each vesting date.
5. 1/5th of the shares subject to the option vested on March 15, 2012 and the balance of the shares have vested and will vest monthly thereafter over the next four years, provided that the Reporting Person continues to serve through each vesting date.
6. 1/5th of the shares subject to the option will vest on February 15, 2013 and the balance of the shares will vest monthly thereafter over the next four years, provided that the Reporting Person continues to serve through each vesting date.
Brian Dow, Attorney-in-fact for Kevin P. Corcoran 04/03/2012
** 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 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
rrd305514_344642.html
					POWER OF ATTORNEY


The undersigned, as a Section 16 reporting person of Pacific Biosciences of California, Inc.
(the "Company"), hereby constitutes and appoints Susan K. Barnes, Brian Dow and Stephen Moore,
and each of them, the undersigned's true and lawful attorney-in-fact to:

1. complete and execute Forms 3, 4 and 5 and other forms and all amendments thereto as such
attorney-in-fact shall in his or her discretion determine to be required or advisable pursuant
to Section 16 of the Securities Exchange Act of 1934 (as amended) and the rules and regulations
promulgated thereunder, or any successor laws and regulations, as a consequence of the
undersigned's ownership, acquisition or disposition of securities of the Company; and

2. do all acts necessary in order to file such forms with the U.S. Securities and Exchange
Commission ("SEC"), any securities exchange or national association, the Company and such other
person or agency as the attorney-in-fact shall deem appropriate.

   The undersigned also hereby constitutes and appoints the responsible attorneys and paralegals
of Wilson Sonsini Goodrich & Rosati P.C., and each of them, the undersigned's true and lawful
attorney-in-fact and agent to complete, execute and file an Update Passphrase Request and the
Update Passphrase Acknowledgement on the Electronic Data Gathering, Analysis, and Retrieval
system ("EDGAR") of the SEC, or such other forms and/or procedures as prescribed by the SEC in
order for the foregoing attorney-in-fact to re-generate the undersigned's SEC EDGAR Filing Codes.

   The undersigned hereby ratifies and confirms all that said attorneys-in-fact and agents shall
do or cause to be done by virtue hereof.  The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16
of the Securities Exchange Act of 1934 (as amended).

   This Power of Attorney shall remain in full force and effect until the undersigned is no
longer required to file Forms ID, 3, 4 and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked by the undersigned in
a signed writing delivered to the Company and the foregoing attorneys-in-fact.

   IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of
this 27th day of March, 2012.


Signature: /s/ Kevin P. Corcoran
Name:	Kevin P. Corcoran