John Anthony  Maddison net worth and biography

John Maddison Biography and Net Worth

Insider of F5

John Maddison is F5’s Chief Marketing Officer. John has more than 30 years of experience leading product teams and corporate marketing functions in cybersecurity, cloud, and telecommunications. Prior to F5, John spent 12 years at Fortinet, most recently as Chief Marketing Officer and EVP of Product Strategy. He previously held leadership positions at Trend Micro, Vina Communications, and Octel Communications.

John holds a B.S. in Engineering degree from Plymouth University in Devon, England.

What is John Anthony Maddison's net worth?

The estimated net worth of John Anthony Maddison is at least $801.25 thousand as of February 10th, 2026. Maddison owns 2,925 shares of F5 stock worth more than $801,245 as of February 14th. This net worth estimate does not reflect any other assets that Maddison may own. Learn More about John Anthony Maddison's net worth.

How do I contact John Anthony Maddison?

The corporate mailing address for Maddison and other F5 executives is 801 5TH AVENUE, SEATTLE WA, 98104. F5 can also be reached via phone at (206) 272-5555 and via email at [email protected]. Learn More on John Anthony Maddison's contact information.

Has John Anthony Maddison been buying or selling shares of F5?

Within the last three months, John Anthony Maddison has sold $280,660.00 in shares of F5 stock. Most recently, John Anthony Maddison sold 1,000 shares of the business's stock in a transaction on Tuesday, February 10th. The shares were sold at an average price of $280.66, for a transaction totalling $280,660.00. Following the completion of the sale, the insider now directly owns 2,925 shares of the company's stock, valued at $820,930.50. Learn More on John Anthony Maddison's trading history.

Who are F5's active insiders?

F5's insider roster includes Kunal Anand (Chief Product Officer), Deborah Bevier (Director), Marianne Budnik (Director), Elizabeth Buse (Director), Michael Dreyer (Director), Thomas Fountain (EVP), Alan Higginson (Director), Scot Jarvis (Director), Geng Lin (EVP), Francois Locoh-Donou (President, CEO & Director), John Maddison (Insider), Marie Myers (Director), Angelique Okeke (Executive Vice President and General Counsel), Francis Pelzer (CFO), Scot Rogers (EVP), Lyra Schramm (Chief People Officer), Chad Whalen (EVP), Ana White (EVP), and Mika Yamamoto (CMO). Learn More on F5's active insiders.

Are insiders buying or selling shares of F5?

In the last year, insiders at the network technology company sold shares 36 times. They sold a total of 67,539 shares worth more than $18,289,919.50. The most recent insider tranaction occured on February, 10th when EVP Thomas Dean Fountain sold 1,297 shares worth more than $360,981.04. Insiders at F5 own 0.5% of the company. Learn More about insider trades at F5.

Information on this page was last updated on 2/10/2026.

John Anthony Maddison Insider Trading History at F5

Transaction DateBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
2/10/2026Sell1,000$280.66$280,660.002,925View SEC Filing Icon  
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John Anthony Maddison Buying and Selling Activity at F5

This chart shows John Anthony Maddison's buying and selling at F5 by year and by quarter.

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F5 Company Overview

F5 logo
F5, Inc. provides multi-cloud application security and delivery solutions in the United States, Europe, the Middle East, Africa, and the Asia Pacific region. The company's distributed cloud services enable its customers to deploy, secure, and operate applications in any architecture, from on-premises to the public cloud. It offers unified, security, networking, and application management solutions, such as web app and API protection; multi-cloud networking; application delivery and deployment; domain name system; content delivery network; and application deployment and orchestration. The company also provides application security and delivery products, including NGINX Plus; NGINX Management Suite; NGINX Ingress Controller; NGINX App Protect; BIG-IP Packaged Software; and BIG-IP Systems. In addition, it provides a range of professional services, including maintenance, consulting, training, and other technical support services. F5, Inc. sells its products to large enterprise businesses, public sector institutions, governments, and service providers through distributors, value-added resellers, managed service providers, systems integrators, and other indirect channel partners. It has partnerships with public cloud providers, such as Amazon Web Services, Microsoft Azure, and Google Cloud Platform. The company was formerly known as F5 Networks, Inc. and changed its name to F5, Inc. in November 2021. F5, Inc. was incorporated in 1996 and is headquartered in Seattle, Washington.
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Today's Range

Now: $273.93
Low: $262.89
High: $275.38

50 Day Range

MA: $266.74
Low: $248.21
High: $292.30

2 Week Range

Now: $273.93
Low: $223.76
High: $346.00

Volume

586,474 shs

Average Volume

1,047,024 shs

Market Capitalization

$15.48 billion

P/E Ratio

22.66

Dividend Yield

N/A

Beta

1