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Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (480 ops.)
Latest filing published 19 Oct 2026 for Cloudflare, Inc., €498k.
Filing timeline
BuySaleThomas J. Seifert
First 200 filings with a declared amount
Insider track record
Disclosed buys
0
Disclosed sells
480
Signal history
Thomas J. Seifert: trading record in brief
This profile gathers the share dealings of Thomas J. Seifert across 4 companies, led by Cloudflare, Inc., IPG Photonics Corp and Gen Digital Inc. In total, 671 filings cover trades dated from 11 November 2002 to 19 October 2026.
Every open-market trade on record is a sale: 480 sales worth €208.8M. Other entries cover 37 share grants and 9 option exercises. In 2026 alone, the filings show no purchases and 46 sales.
The record was last updated on 19 October 2026 with an option exercise (€498k) in Cloudflare, Inc. Filings reach the SEC (Form 4) feed a median of 1 day after the trade. US insiders must file a Form 4 within two business days of a trade. Keep in mind that insiders sell for many reasons unrelated to the outlook, from tax bills to estate planning. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.
Companies and markets linked to Thomas J. Seifert
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations671 total
12,500 shares@ US$44.720.0005% mcap0.8% of flowClass A Common StockSEC:0001473289-26-000031:1
3,401 shares@ US$298.32120.0010% mcap1.4% of flowClass A Common StockSEC:0001473289-26-000031:3
2,944 shares@ US$316.320.0009% mcap1.3% of flowClass A Common StockSEC:0001473289-26-000031:0
1,100 shares@ US$297.29190.0003% mcap0.5% of flowClass A Common StockSEC:0001473289-26-000031:2
3,756 shares@ US$299.35550.0011% mcap1.6% of flowClass A Common StockSEC:0001473289-26-000031:4
2,643 shares@ US$300.39140.0008% mcap1.1% of flowClass A Common StockSEC:0001473289-26-000031:5
598 shares@ US$301.99430.0002% mcap0.2% of flowClass A Common StockSEC:0001473289-26-000031:6
502 shares@ US$303.25580.0001% mcap0.2% of flowClass A Common StockSEC:0001473289-26-000031:7
500 shares@ US$304.150.0001% mcap0.2% of flowClass A Common StockSEC:0001473289-26-000031:8
300 shares@ US$328.040.0001% mcap0.1% of flowClass A Common StockSEC:0001473289-26-000029:4
10,000 sharesClass A Common StockSEC:0001473289-26-000029:0
100 shares@ US$320.890.0000% mcap0.0% of flowClass A Common StockSEC:0001473289-26-000029:2
100 shares@ US$336.510.0000% mcap0.0% of flowClass A Common StockSEC:0001473289-26-000029:12
100 shares@ US$318.900.0000% mcap0.0% of flowClass A Common StockSEC:0001473289-26-000029:1
100 shares@ US$326.560.0000% mcap0.0% of flowClass A Common StockSEC:0001473289-26-000029:3
700 shares@ US$329.37310.0002% mcap0.3% of flowClass A Common StockSEC:0001473289-26-000029:5
700 shares@ US$330.22780.0002% mcap0.3% of flowClass A Common StockSEC:0001473289-26-000029:6
1,196 shares@ US$331.58980.0004% mcap0.5% of flowClass A Common StockSEC:0001473289-26-000029:7
1,604 shares@ US$332.50020.0005% mcap0.7% of flowClass A Common StockSEC:0001473289-26-000029:8
2,632 shares@ US$333.61710.0008% mcap1.2% of flowClass A Common StockSEC:0001473289-26-000029:9
1,868 shares@ US$334.59050.0006% mcap0.8% of flowClass A Common StockSEC:0001473289-26-000029:10
600 shares@ US$335.31970.0002% mcap0.3% of flowClass A Common StockSEC:0001473289-26-000029:11
2,944 shares@ US$327.230.0009% mcap1.1% of flowClass A Common StockSEC:0001473289-26-000027:0
10,000 sharesClass A Common StockSEC:0001473289-26-000025:0
200 shares@ US$312.320.0000% mcap0.1% of flowClass A Common StockSEC:0001473289-26-000025:6
25 of 671 declarations
