Below are some of the most frequently asked questions about Pfenex Inc. If you don’t find what you’re looking for here, please contact us directly.

Where can I find more information on Pfenex’s R&D programs?

You can view information on our platform and programs by visiting the “Product Pipeline” section of our website.

Who can I contact if I am a member of the media?

For media inquiries please send an email to media@pfenex.com.

Where can I find recent Pfenex press releases?

You can view our recent press releases by visiting the “Newsroom” section of our website.

How can I get a copy of your Annual Report or any other Investor materials such as an Investor Relations kit or 10-K?

Quarterly & Annual Reports and other investor materials are available under “Financials & Filings” of the “Investor Relations” section of our corporate website.  Additionally, all SEC filings can also be accessed directly from the SEC atwww.sec.gov.

How do I report a change of mailing address?

You must send both your old and new addresses to our transfer agent, American Stock Transfer,http://www.amstock.com/main/nav_contactUs.asp, by U.S. mail. Each stockholder in question must sign the request for an address change.

How can I replace my lost stock certificates?

Please contact our transfer agent at: http://www.amstock.com/main/nav_contactUs.asp. The company can look up your records and make any necessary adjustments. There is a fee involved for replacing lost certificates.

Who is Pfenex’s transfer agent and how do I contact them?

Pfenex’s transfer agent is American Stock Transfer and Trust Company, LLC (AST). You can find more information about how to contact AST at: http://www.amstock.com/main/nav_contactUs.asp.

What is Pfenex’s CUSIP number?

PI 717071 104

Does Pfenex pay dividends and have a dividend reinvestment program?

Currently, Pfenex does not offer a dividend or a dividend reinvestment program.

Does Pfenex have a direct stock purchase plan?

Pfenex does not offer a direct stock purchase plan.

How can I purchase shares?

Shares can be purchased through a stockbroker of your choice.

When did Pfenex go public?

Pfenex went public on July 24, 2014.

On which exchange is Pfenex listed and what is the ticker symbol?

Pfenex is traded on the New York Stock Exchange under the symbol “PFNX”.

Who is Pfenex’s independent registered public accounting firm?

Haskell & White LLP

When is Pfenex’s fiscal year-end?

December 31st

Who are the members of Pfenex’s management team?

You can view our management team by visiting the “Senior Management” section of our website.

Who are the members of Pfenex’s Board of Directors?

You can view our Board of Directors by visiting the “Board of Directors” section of our website.

Where is Pfenex’s corporate headquarters?

10790 Roselle Street
San Diego, CA 92121
Phone: (858) 352-4400

Where is Pfenex incorporated?

Pfenex was incorporated in the state of Delaware in November 2009.

When was Pfenex founded?

Pfenex was founded in 2009.

How do I contact Investor Relations with a question or request?

For investor related questions please send an email toinvestors@pfenex.com

How can I sign up to receive Pfenex’s press releases and other company information?

Please visit the “Investor Relations” section of our corporate website and choose “Email Alerts” to be added to the Pfenex distribution list.

If I have questions regarding Pfenex that have not been answered, whom should I contact?

Please visit “Contact Us” and fill out our web form.