Market leaders expand existing relationship to extend enterprise capabilities

SUNNYVALE, Calif. —June 6, 2016 – Proofpoint, Inc., (NASDAQ:PFPT), a leading next-generation cybersecurity company, today announced it has expanded its relationship with LinkedIn, the world’s largest professional network. Building on the previously announced venture between LinkedIn and Proofpoint and two companies that Proofpoint acquired, Nexgate and Socialware, the deepened relationship will include expanded collaboration around social media security and compliance.

“Proofpoint is a trusted security and compliance brand in the enterprise and has proven to be a consistently reliable and innovative partner,” said Scott Roberts, vice president of Enterprise Business Development, LinkedIn. “As we continue to increase our capabilities for members and their employers to connect, communicate and share content, having a complementary relationship with a market leader is important. It helps our teams scale with focus and give us the ability to satisfy the compliance and security requests of our enterprise customers.”

Businesses and professionals are increasingly leveraging LinkedIn to create and capture as much value as possible. Unique industry, region and even company-specific requirements for compliance and security often come with increased usage of LinkedIn. As a pre-existing LinkedIn Certified Compliance Partner, Proofpoint continues to demonstrate success in leveraging LinkedIn’s platform capabilities to protect and ensure compliance of LinkedIn activities for companies and their employees.

"Primerica has more than 100,000 independent agents, many of whom are using LinkedIn for networking and relationship management," said Michelle Chastain, vice president and assistant general counsel at Primerica. "Maintaining compliance with regulatory requirements is critical and highly complex. We are confident we can take advantage of the power of social media at scale leveraging capabilities delivered by partnerships between leaders like LinkedIn and Proofpoint."

The expanded relationship includes continued use of LinkedIn’s platform for existing and new capabilities, increased collaboration between the companies on existing and new business opportunities, and closer alignment between their enterprise customer-facing teams.

"LinkedIn continues to be the leader in professional networking and driving value for companies and employees in social,” said Devin Redmond, vice president and general manager of Digital Risk Solutions for Proofpoint. "The sole focus of our team is to provide the broadest and deepest set of security and compliance capabilities for social networks. Our status as a LinkedIn preferred compliance and security partner will only increase our ability to help companies more broadly and quickly adopt LinkedIn solutions.”

For more information on Proofpoint's social media security and compliance solutions, please visit http://nexgate.com/solutions/social- media-risk-compliance/. For more details about intelligent social archiving, please visit http://nexgate.com/products/social-patrol- archive/. All solutions are currently available.

About Proofpoint, Inc.

Proofpoint Inc. (NASDAQ:PFPT) is a leading next-generation security and compliance company that provides cloud-based solutions for comprehensive threat protection, incident response, secure communications, social media and mobile security, compliance, archiving and governance. Organizations around the world depend on Proofpoint’s expertise, patented technologies and on-demand delivery system. Proofpoint protects against phishing, malware and spam, while safeguarding privacy, encrypting sensitive information, and archiving and governing messages and critical enterprise information. More information is available at www.proofpoint.com.

Connect with Proofpoint: Twitter | LinkedIn | Facebook | YouTube | Google+

Forward-Looking Statements

This press release contains forward-looking statements that involve risks and uncertainties. These forward-looking statements include statements regarding future offerings and solutions and the features of such offerings and solutions. It is possible that future circumstances might differ from the assumptions on which such statements are based. Important factors that could cause results to differ materially from the statements herein include: technical challenges in implementing future offerings and solutions in a timely fashion; changes in strategy; unforeseen delays in developing new technologies and the uncertain market acceptance of new products or features; and the other risk factors set forth from time to time in our filings with the SEC, including our Quarterly Report on Form 10-Q for the three months ending March 31, 2016, and the other reports we file with the SEC, copies of which are available free of charge at the SEC's website at www.sec.gov or upon request from our investor relations department.  All forward-looking statements herein reflect our opinions only as of the date of this release, and Proofpoint undertakes no obligation, and expressly disclaims any obligation, to update forward-looking statements herein in light of new information or future events.

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