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Thomas J. Seifert, insider at Cloudflare
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Thomas J. Seifert Insider Information

CFO of Cloudflare

Thomas Seifert is the chief financial officer of Cloudflare, an internet performance and security company.

Seifert joined the company in 2017 as its first CFO. In the role, he oversees the global finance department. 

Prior to Cloudflare, he served as the CFO of Symantec, where he laid the foundation for the computer software company’s strategic and financial transition as it acquired BlueCoat. From 2012 to 2014, he served as Brightstar’s CFO, managing the company’s treasury, corporate accounting, financial operations and information technology. Before Brightstar, Seifert served as CFO for Advanced Micro Devices and as its interim CEO for eight months in 2012. 

His early career included numerous executive roles in wireless and technology at Infineon Technologies AG, Qimonda AG, and Wirelines Communications Business Group. He currently serves as a member of the board of directors for IPG Photonics and First Derivatives. 

Seifert holds his B.A. in business administration and his M.B.A. from Friedrich Alexander University in Germany, and he earned his M.A. in mathematics and economics from Wayne State University. 

What is Thomas J. Seifert's net worth?

The estimated net worth of Thomas J. Seifert is at least $12.72 million as of September 14th, 2021. Mr. Seifert owns 70,156 shares of Cloudflare stock worth more than $12,722,791 as of October 23rd. This net worth estimate does not reflect any other assets that Mr. Seifert may own. Additionally, Mr. Seifert receives an annual salary of $650,000.00 as CFO at Cloudflare. Learn More.

How old is Thomas J. Seifert?

Mr. Seifert is currently 58 years old. There are 3 older executives and no younger executives at Cloudflare. Learn More.

What is Thomas J. Seifert's salary?

As the CFO of Cloudflare, Inc., Mr. Seifert earns $650,000.00 per year.

How do I contact Thomas J. Seifert?

The corporate mailing address for Mr. Seifert and other Cloudflare executives is 101 Townsend Street, San Francisco CA, 94107. Cloudflare can also be reached via email at [email protected]

Has Thomas J. Seifert been buying or selling shares of Cloudflare?

Within the last three months, Thomas J. Seifert has sold $2,968,400.00 of Cloudflare stock. Most recently, Thomas J. Seifert sold 20,000 shares of the business's stock in a transaction on Tuesday, October 12th. The shares were sold at an average price of $148.42, for a transaction totalling $2,968,400.00.

Who are Cloudflare's active insiders?

Cloudflare's insider roster includes Douglas Kramer (General Counsel), Matthew Prince (CEO), Thomas Seifert (CFO), and Michelle Zatlyn (COO).

Are insiders buying or selling shares of Cloudflare?

In the last twelve months, insiders at the sold shares 89 times. They sold a total of 3,914,853 shares worth mmore than $353,984,317.77. The most recent insider tranaction occured on October, 20th when Matthew Prince CEO bought 52,385 shares worth more than $9,100,322.20. Insiders at Cloudflare own 20.7 % of the company.

Information on this page was last updated on 10/20/2021.

Thomas J. Seifert Insider Trading History at Cloudflare

Transaction DateBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
10/12/2021Sell20,000$148.42$2,968,400.00View SEC Filing Icon  
9/28/2021Sell20,000$114.43$2,288,600.00View SEC Filing Icon  
9/14/2021Sell20,000$127.31$2,546,200.0070,156View SEC Filing Icon  
8/31/2021Sell20,000$121.48$2,429,600.0075,156View SEC Filing Icon  
8/17/2021Sell20,000$119.37$2,387,400.0070,156View SEC Filing Icon  
8/3/2021Sell20,000$118.76$2,375,200.00View SEC Filing Icon  
7/20/2021Sell20,000$106.77$2,135,400.00View SEC Filing Icon  
7/6/2021Sell20,000$108.06$2,161,200.00View SEC Filing Icon  
6/24/2021Sell50,000$105.28$5,264,000.00100,156View SEC Filing Icon  
6/22/2021Sell20,000$102.28$2,045,600.0070,156View SEC Filing Icon  
6/14/2021Sell50,000$95.19$4,759,500.00100,156View SEC Filing Icon  
6/8/2021Sell20,000$89.48$1,789,600.0070,156View SEC Filing Icon  
5/25/2021Sell20,000$79.72$1,594,400.0070,156View SEC Filing Icon  
5/11/2021Sell20,000$70.07$1,401,400.0070,156View SEC Filing Icon  
4/27/2021Sell20,000$86.94$1,738,800.0070,156View SEC Filing Icon  
4/13/2021Sell20,000$74.80$1,496,000.0070,156View SEC Filing Icon  
3/16/2021Sell20,000$75.21$1,504,200.0070,156View SEC Filing Icon  
10/27/2020Sell30,000$56.02$1,680,600.0030,000View SEC Filing Icon  
10/13/2020Sell30,000$58.22$1,746,600.0030,000View SEC Filing Icon  
9/29/2020Sell15,000$40.92$613,800.0015,000View SEC Filing Icon  
9/1/2020Sell15,000$39.75$596,250.0015,000View SEC Filing Icon  
7/21/2020Sell15,000$38.33$574,950.0015,000View SEC Filing Icon  
7/7/2020Sell15,000$38.04$570,600.0015,000View SEC Filing Icon  
6/23/2020Sell15,000$35.71$535,650.0015,000View SEC Filing Icon  
6/9/2020Sell15,000$29.40$441,000.0015,000View SEC Filing Icon  
5/26/2020Sell15,000$28.05$420,750.0015,000View SEC Filing Icon  
5/12/2020Sell15,000$29.13$436,950.0015,000View SEC Filing Icon  
4/28/2020Sell15,000$23.61$354,150.0015,000View SEC Filing Icon  
4/14/2020Sell15,000$23.21$348,150.0015,000View SEC Filing Icon  
3/31/2020Sell15,000$24.60$369,000.0015,000View SEC Filing Icon  
3/17/2020Sell15,000$18.00$270,000.0015,000View SEC Filing Icon  
3/3/2020Sell15,000$21.97$329,550.0015,000View SEC Filing Icon  
See Full Table

Thomas J. Seifert Buying and Selling Activity at Cloudflare

This chart shows Thomas J Seifert's buying and selling at Cloudflare by year and by quarter.

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Cloudflare Company Overview

Cloudflare logo
CloudFlare, Inc. operates a cloud platform that delivers a range of network services to businesses worldwide. The company provides an integrated cloud-based security solution to secure a range of combination of platforms, including public cloud, private cloud, on-premise, software-as-a-service applications, and Internet of Things (IoT) devices. Its security products comprise cloud firewall, bot management, distributed denial of service, IoT, SSL/TLS, secure origin connection, and rate limiting products. The company also offers performance solutions, which include content delivery, intelligent routing, and mobile software development kit, as well as content, mobile, and image optimization solutions. In addition, it provides reliability solutions comprising load balancing, anycast network, virtual backbone, DNS, DNS resolver, and always online solutions that enhances Internet experience and allows customers to run their digital operations efficiently. Further, the company provides Cloudflare internal infrastructure solutions, including on-ramps, which connect users, devices, or locations to Cloudflare's network; and filters, which are the products that protect, inspect, and privilege data. Additionally, it offers developer-based solutions, such as serverless computing/programmable network, website development, domain registration, Cloudflare apps, and analytics; Consumer DNS Resolver, a consumer application to browse the Internet; and Consumer VPN for consumers designed to secure and accelerate traffic on mobile devices. The company serves customers in technology, healthcare, financial services, consumer and retail, and non-profit industries, as well as government. It has a strategic agreement with Baidu, Inc. and JD Cloud & AI. CloudFlare, Inc. was incorporated in 2009 and is headquartered in San Francisco, California.
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Today's Range

Now: $181.35
Low: $177.22
High: $184.47

50 Day Range

MA: $131.77
Low: $112.34
High: $181.35

2 Week Range

Now: $181.35
Low: $50.54
High: $184.47


3,074,143 shs

Average Volume

3,932,015 shs

Market Capitalization

$56.66 billion

P/E Ratio


Dividend Yield



Learn to Customize Your Own Options Trading Strategy
This guide will help you evaluate and analyze your trading plan to create a custom options trading strategy tailored to your risk profile and market outlook. Learn how to take your trading to the next level.
Download your FREE Options Strategy Guide Today!