Membership inclusion highlights the Company’s success on generating cash flow and returning capital to stockholders

Spok Holdings, Inc. (NASDAQ: SPOK), a global leader in healthcare communications, is set to join the broad-market Russell 3000^® Index at the conclusion of the 2023 Russell indexes annual reconstitution, effective after the US market opens on June 26, according to a preliminary list of additions posted May 19.

“We are honored to be part of the Russell Index,” said Vincent D. Kelly, chief executive officer of Spok Holdings, Inc. “I am proud of what the Spok team has accomplished over the past year with our focus on generating cash flow and returning capital to stockholders. It is rewarding to see the leadership exhibited by our Board of Directors and the clear progress by our team reflected in this recognition. We look forward to continued success for the remainder of the year and believe our extensive experience operating our established communication solutions will create significant value for stockholders by maximizing revenue and cash flow generation.”

Annual Russell indexes reconstitution captures the 4,000 largest US stocks as of April 28, ranking them by total market capitalization. Membership in the US all-cap Russell 3000^® Index, which remains in place for one year, means automatic inclusion in the large-cap Russell 1000^® Index or small-cap Russell 2000^® Index as well as the appropriate growth and value style indexes. FTSE Russell determines membership for its Russell indexes primarily by objective, market-capitalization rankings and style attributes.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. Approximately $12.1 trillion in assets are benchmarked against Russell’s US indexes. Russell indexes are part of FTSE Russell, a leading global index provider.

For more information on the Russell 3000^® Index and the Russell indexes reconstitution, go to the “Russell Reconstitution” section on the FTSE Russell website.

About Spok

Spok, Inc., a wholly owned subsidiary of Spok Holdings, Inc. (NASDAQ: SPOK), headquartered in Alexandria, Virginia, is proud to be a global leader in healthcare communications. We deliver clinical information to care teams when and where it matters most to improve patient outcomes. Top hospitals rely on the Spok Care Connect^® platform to enhance workflows for clinicians and support administrative compliance. Our customers send over 100 million messages each month through their Spok^® solutions. Spok enables smarter, faster clinical communication. For more information, visit spok.com or follow @spoktweets on Twitter.

Spok is a trademark of Spok Holdings, Inc. Spok Care Connect and Spok Mobile are trademarks of Spok, Inc.

About FTSE Russell:

FTSE Russell is a global index leader that provides innovative benchmarking, analytics and data solutions for investors worldwide. FTSE Russell calculates thousands of indexes that measure and benchmark markets and asset classes in more than 70 countries, covering 98% of the investable market globally.

FTSE Russell index expertise and products are used extensively by institutional and retail investors globally. Approximately $20.1 trillion is currently benchmarked to FTSE Russell indexes. For over 30 years, leading asset owners, asset managers, ETF providers and investment banks have chosen FTSE Russell indexes to benchmark their investment performance and create ETFs, structured products and index-based derivatives.

A core set of universal principles guides FTSE Russell index design and management: a transparent rules-based methodology is informed by independent committees of leading market participants. FTSE Russell is focused on applying the highest industry standards in index design and governance and embraces the IOSCO Principles. FTSE Russell is also focused on index innovation and customer partnerships as it seeks to enhance the breadth, depth and reach of its offering.

FTSE Russell is wholly owned by London Stock Exchange Group.

For more information, visit www.ftserussell.com.

Safe Harbor Statement under the Private Securities Litigation Reform Act:

Statements contained herein or in prior press releases which are not historical fact, such as statements regarding Spok’s future operating and financial performance, are forward-looking statements for purposes of the safe harbor provisions under the Private Securities Litigation Reform Act of 1995. These forward-looking statements involve risks and uncertainties that may cause Spok’s actual results to be materially different from the future results expressed or implied by such forward-looking statements. Factors that could cause actual results to differ materially from those expectations include, but are not limited to, our ability to manage wireless network rationalization to lower our costs without causing disruption of service to our customers; our ability to retain key management personnel and to attract and retain talent within the organization; the productivity of our sales organization and our ability to deliver effective customer support; our ability to identify potential acquisitions, consummate and successfully integrate such acquisitions, and achieve the expected benefits of such acquisitions; risks related to the COVID-19 pandemic; economic conditions such as recessionary economic cycles, higher interest rates, inflation and higher levels of unemployment; competition for our services and products from new technologies or those offered and/or developed from firms that are substantially larger and have much greater financial and human capital resources; continuing decline in the number of paging units we have in service with customers, commensurate with a continuing decline in our wireless revenue; our ability to address changing market conditions with new or revised software solutions; undetected defects, bugs, or security vulnerabilities in our products; our dependence on the U.S. healthcare industry; the sales cycle of our software solutions and services can run from six to eighteen months, making it difficult to plan for and meet our sales objectives and bookings on a steady basis quarter-to-quarter and year-to-year; our reliance on third-party vendors to supply us with wireless paging equipment; our ability to maintain successful relationships with our channel partners; our ability to protect our rights in intellectual property that we own and develop and the potential for litigation claiming intellectual property infringement by us; our use of open source software, third-party software and other intellectual property; the reliability of our networks and servers and our ability to prevent cyber-attacks and other security issues and disruptions; unauthorized breaches or failures in cybersecurity measures adopted by us and/or included in our products and services; our ability to realize the benefits associated with our deferred income tax assets; future impairments of our long-lived assets, amortizable intangible assets or goodwill; risks related to data privacy and protection-related laws and regulation; and our ability to manage changes related to regulation, including laws and regulations affecting hospitals and the healthcare industry generally, as well as other risks described from time to time in our periodic reports and other filings with the Securities and Exchange Commission. Although Spok believes the expectations reflected in the forward-looking statements are based on reasonable assumptions, it can give no assurance that its expectations will be attained. Spok disclaims any intent or obligation to update any forward-looking statements.

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