SEIFERT THOMAS J
Chief Financial Officer
SEIFERT THOMAS J has filed 25 SEC Form 4 filings (200 transaction rows) across 1 company, with disclosures dating back to 2025. 18 of those filings fall inside the rolling window. Most recent filing: Oct 19, 2026.
On the most recent filing, SEIFERT THOMAS J is listed as Chief Financial Officer at Cloudflare, Inc. Inside the rolling window, SEIFERT THOMAS J reported no open-market purchases and 13 open-market sales totaling $57.5M in NET. The largest disclosed transaction in the window is a sale of 55,000 NET shares on Aug 4, 2026, worth $16.5M.
Companies traded
Other insiders at NET
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$57.5M
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| NET | Chief Financial Officer | Sale | 12,500 | $3.7M | Oct 19 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $3.3M | Sep 21 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $3.1M | Aug 19 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 55,000 | $16.5M | Aug 6 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $2.8M | Jul 17 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $2.3M | Jun 17 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $2.0M | May 19 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $2.0M | Apr 17 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,341 | $2.2M | Mar 17 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 41,557 | $7.7M | Feb 24 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $1.8M | Jan 21 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 10,000 | $2.0M | Dec 23 | SEC ↗ | |
| NET | Chief Financial Officer | Sale | 41,555 | $8.1M | Nov 21 | SEC ↗ |
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Oct 20, 2025 | NET | Sale | $64K |
| Oct 20, 2025 | NET | Sale | $818K |
| Oct 20, 2025 | NET | Sale | $583K |
| Oct 20, 2025 | NET | Sale | $548K |
| Oct 20, 2025 | NET | Sale | $105K |
| Sep 22, 2025 | NET | Sale | $92K |
| Sep 22, 2025 | NET | Sale | $637K |
| Sep 22, 2025 | NET | Sale | $690K |
| Sep 22, 2025 | NET | Sale | $409K |
| Sep 22, 2025 | NET | Sale | $90K |
| Sep 22, 2025 | NET | Sale | $135K |
| Sep 22, 2025 | NET | Sale | $223K |
| Aug 20, 2025 | NET | Sale | $175K |
| Aug 20, 2025 | NET | Sale | $105K |
| Aug 20, 2025 | NET | Sale | $2.1M |
| Aug 20, 2025 | NET | Sale | $769K |
| Aug 20, 2025 | NET | Sale | $2.4M |
| Aug 20, 2025 | NET | Sale | $772K |
| Aug 20, 2025 | NET | Sale | $670K |
| Aug 20, 2025 | NET | Sale | $432K |
| Aug 20, 2025 | NET | Sale | $205K |
| Aug 20, 2025 | NET | Sale | $297K |
Frequently asked questions
How many SEC Form 4 filings has SEIFERT THOMAS J made?
SEIFERT THOMAS J has filed 25 SEC Form 4 filings (200 transaction rows) across 1 company since 2025.
Which companies does SEIFERT THOMAS J trade?
SEIFERT THOMAS J has filed SEC Form 4 disclosures for 1 company, including NET.
When was SEIFERT THOMAS J's most recent SEC Form 4 filing?
SEIFERT THOMAS J's most recent SEC Form 4 filing on Tracefour is dated Oct 19, 2026.
What is SEIFERT THOMAS J's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, SEIFERT THOMAS J is listed as Chief Financial Officer.
What is SEIFERT THOMAS J's total buy and sell value in the current window?
Inside the rolling retention window, SEIFERT THOMAS J bought $0 and sold $57.5M based on SEC Form 4 filings.
What was SEIFERT THOMAS J's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 55,000 NET shares on 2026-08-04, worth $16.5M, per SEC Form 4 filings.