Thomas J.  Seifert net worth and biography

Thomas Seifert Biography and Net Worth

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 $33.41 million as of February 20th, 2024. Mr. Seifert owns 338,469 shares of Cloudflare stock worth more than $33,406,890 as of February 26th. 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 about Thomas J. Seifert's net worth.

How old is Thomas J. Seifert?

Mr. Seifert is currently 61 years old. There are 5 older executives and no younger executives at Cloudflare. The oldest executive at Cloudflare is Mr. Mark F. Anderson, President of Revenue & Director, who is 62 years old. Learn More on Thomas J. Seifert's age.

What is Thomas J. Seifert's salary?

As the CFO of Cloudflare, Inc., Mr. Seifert earns $650,000.00 per year. The highest earning executive at Cloudflare is Ms. Michelle Zatlyn, Co-Founder, COO, President & Director, who commands a salary of $1,450,000.00 per year. Learn More on Thomas J. Seifert's salary.

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 phone at 888-993-5273 and via email at [email protected]. Learn More on Thomas J. Seifert's contact information.

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

In the last ninety days, Thomas J. Seifert has sold $11,745,620.56 in shares of Cloudflare stock. Most recently, Thomas J. Seifert sold 27,901 shares of the business's stock in a transaction on Tuesday, February 20th. The shares were sold at an average price of $96.56, for a transaction totalling $2,694,120.56. Following the completion of the sale, the chief financial officer now directly owns 338,469 shares of the company's stock, valued at $32,682,566.64. Learn More on Thomas J. Seifert's trading history.

Who are Cloudflare's active insiders?

Cloudflare's insider roster includes Forest Baskett (Major Shareholder), Maria Eitel (Director), Patrick Kerins (Major Shareholder), Douglas Kramer (General Counsel), Carl Ledbetter (Director), Stanley Meresman (Director), Matthew Prince (CEO), Scott Sandell (Director), Thomas Seifert (CFO), Katrin Suder (Director), Paul Underwood (CAO), and Michelle Zatlyn (COO). Learn More on Cloudflare's active insiders.

Are insiders buying or selling shares of Cloudflare?

In the last twelve months, insiders at the sold shares 120 times. They sold a total of 2,970,106 shares worth more than $218,677,309.34. The most recent insider tranaction occured on February, 23rd when CEO Matthew Prince sold 52,384 shares worth more than $5,172,920.00. Insiders at Cloudflare own 14.8% of the company. Learn More about insider trades at Cloudflare.

Information on this page was last updated on 2/23/2024.

Thomas J. Seifert Insider Trading History at Cloudflare

Transaction DateBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
2/20/2024Sell27,901$96.56$2,694,120.56338,469View SEC Filing Icon  
2/9/2024Sell50,000$110.11$5,505,500.00366,465View SEC Filing Icon  
2/2/2024Sell15,000$81.87$1,228,050.00366,465View SEC Filing Icon  
1/18/2024Sell15,000$77.73$1,165,950.00243,495View SEC Filing Icon  
1/3/2024Sell15,000$76.80$1,152,000.00243,495View SEC Filing Icon  
12/13/2023Sell34,329$80.21$2,753,529.09243,495View SEC Filing Icon  
12/6/2023Sell400$80.00$32,000.00243,495View SEC Filing Icon  
12/4/2023Sell30,271$79.70$2,412,598.70243,495View SEC Filing Icon  
11/17/2023Sell16,901$72.13$1,219,069.13243,495View SEC Filing Icon  
11/3/2023Sell15,000$63.18$947,700.00253,352View SEC Filing Icon  
10/18/2023Sell15,000$63.03$945,450.00253,352View SEC Filing Icon  
10/3/2023Sell15,000$59.23$888,450.00253,352View SEC Filing Icon  
9/18/2023Sell15,000$61.75$926,250.00253,352View SEC Filing Icon  
9/5/2023Sell15,000$64.53$967,950.00253,352View SEC Filing Icon  
8/18/2023Sell16,901$58.33$985,835.33253,352View SEC Filing Icon  
8/3/2023Sell15,000$64.86$972,900.00263,209View SEC Filing Icon  
7/18/2023Sell15,000$72.24$1,083,600.00263,209View SEC Filing Icon  
7/3/2023Sell15,000$65.60$984,000.00263,209View SEC Filing Icon  
6/20/2023Sell15,000$67.28$1,009,200.00263,209View SEC Filing Icon  
6/5/2023Sell15,000$68.88$1,033,200.00263,209View SEC Filing Icon  
5/18/2023Sell16,900$57.35$969,215.00263,209View SEC Filing Icon  
5/3/2023Sell15,000$42.33$634,950.00266,343View SEC Filing Icon  
4/18/2023Sell15,000$64.49$967,350.0061,355View SEC Filing Icon  
4/3/2023Sell15,000$60.79$911,850.0061,355View SEC Filing Icon  
3/30/2023Sell5,218$60.03$313,236.5461,355View SEC Filing Icon  
3/20/2023Sell15,000$53.57$803,550.0061,355View SEC Filing Icon  
2/27/2023Sell20,000$60.25$1,205,000.0061,355View SEC Filing Icon  
2/17/2023Sell15,209$64.65$983,261.8561,355View SEC Filing Icon  
2/13/2023Sell20,000$62.62$1,252,400.0086,433View SEC Filing Icon  
1/30/2023Sell20,000$50.94$1,018,800.0086,433View SEC Filing Icon  
1/17/2023Sell20,000$45.07$901,400.0086,433View SEC Filing Icon  
1/3/2023Sell20,000$43.70$874,000.0086,433View SEC Filing Icon  
12/5/2022Sell20,000$44.53$890,600.0086,433View SEC Filing Icon  
11/11/2022Sell50,000$50.15$2,507,500.0088,415View SEC Filing Icon  
11/7/2022Sell20,000$40.78$815,600.0086,433View SEC Filing Icon  
4/12/2022Sell10,000$115.06$1,150,600.0086,433View SEC Filing Icon  
3/29/2022Sell10,000$129.35$1,293,500.00View SEC Filing Icon  
3/17/2022Sell10,000$100.00$1,000,000.00View SEC Filing Icon  
2/17/2022Sell10,000$106.23$1,062,300.00View SEC Filing Icon  
1/18/2022Sell20,000$95.51$1,910,200.00View SEC Filing Icon  
1/4/2022Sell20,000$114.38$2,287,600.00View SEC Filing Icon  
12/21/2021Sell20,000$139.54$2,790,800.00View SEC Filing Icon  
12/7/2021Sell20,000$157.04$3,140,800.00View SEC Filing Icon  
11/23/2021Sell20,000$183.68$3,673,600.00View SEC Filing Icon  
11/9/2021Sell20,000$204.31$4,086,200.00View SEC Filing Icon  
10/26/2021Sell20,000$186.36$3,727,200.00View SEC Filing Icon  
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 as a cloud services provider that delivers a range of 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 IoT devices; and website and application security products comprising web application firewall, bot management, distributed denial of service, API gateways, SSL/TLS encryption, script management, security center, and rate limiting products. It offers website and application performance solutions, including content delivery, load balancing, DNS, agro smart routing, video stream delivery, web optimization, cache reserve, cloudfare waiting room, and cloudfare data localization suite; SASE platform through cloudfare one that provides a cloud-based network-as-a-service; network services which deliver network connectivity, security, and performance, including magic WAN, magic transit, magic firewall, cloudflare network interconnect, and spectrum. In addition, the company provides zero trust services, such as cloudflare access, cloudflare gateway, remote browser isolation, cloud access security broker, cloud email security, and data loss prevention products that protects, inspects, and provides privilege rules to grant access to data and application. Further, it provides developer-based solutions consisting of cloudflare workers, R2 object storage, workers KV, durable objects, cloudfare pages, cloudfare stream, and cloudfare images; and consumer products comprising of, a DNS resolver, WARP, a virtual private network, and cloudfare registrar that secures registration and management of domain names. The company serves customers in the technology, healthcare, financial services, consumer and retail, industrial, and non-profit industries, as well as government. Cloudflare, Inc. was incorporated in 2009 and is headquartered in San Francisco, California.
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Today's Range

Now: $98.70
Low: $98.70
High: $98.70

50 Day Range

MA: $85.99
Low: $76.26
High: $107.81

2 Week Range

Now: $98.70
Low: $39.90
High: $116.00


4,421 shs

Average Volume

4,654,861 shs

Market Capitalization

$33.14 billion

P/E Ratio


Dividend Yield