InsidersTradesSigma
Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (28 ops.)
Insider track record
CFODisclosed buys
0
Disclosed sells
28
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Explore the full record of transactions filed by Seifert Thomas J, Chief Financial Officer. Director active across 3 companies, notably Cloudflare, Inc.. Aggregated, 159 filings have been recorded. Split: 0 buy · 28 sells. Total volume traded: €24.3m. History available since 25 May 2021. The latest transaction was filed on 15 August 2026 (Retenue fiscale). Regulator: SEC (Form 4). All data is accessible without signup.
Companies and markets linked to Seifert Thomas J
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations159 total
2,944 shares@ US$315.78Class A Common StockSEC:0001473289-26-000023:0
55,000 shares@ US$44.720.0024% mcap4.2% of flowClass A Common StockSEC:0001473289-26-000021:0
53,861 shares@ US$300.28120.016% mcap27.8% of flowClass A Common StockSEC:0001473289-26-000021:1
1,139 shares@ US$301.000.0003% mcap0.6% of flowClass A Common StockSEC:0001473289-26-000021:2
500 shares@ US$274.6040.0001% mcap0.4% of flowClass A Common StockSEC:0001473289-26-000018:5
800 shares@ US$279.91090.0002% mcap0.6% of flowClass A Common StockSEC:0001473289-26-000018:10
10,000 sharesClass A Common StockSEC:0001473289-26-000018:1
300 shares@ US$270.50330.0001% mcap0.2% of flowClass A Common StockSEC:0001473289-26-000018:4
3,299 shares@ US$277.67690.0009% mcap2.4% of flowClass A Common StockSEC:0001473289-26-000018:8
100 shares@ US$267.760.0000% mcap0.1% of flowClass A Common StockSEC:0001473289-26-000018:3
2,943 shares@ US$281.750.0009% mcap2.1% of flowClass A Common StockSEC:0001473289-26-000018:0
200 shares@ US$266.190.0001% mcap0.1% of flowClass A Common StockSEC:0001473289-26-000018:2
1,559 shares@ US$275.78660.0004% mcap1.1% of flowClass A Common StockSEC:0001473289-26-000018:6
1,741 shares@ US$276.6330.0005% mcap1.2% of flowClass A Common StockSEC:0001473289-26-000018:7
1,201 shares@ US$278.75570.0003% mcap0.9% of flowClass A Common StockSEC:0001473289-26-000018:9
300 shares@ US$281.29330.0001% mcap0.2% of flowClass A Common StockSEC:0001473289-26-000018:11
2,944 sharesClass A Common StockSEC:0001473289-26-000016:0
10,000 sharesClass A Common StockSEC:0001473289-26-000016:1
900 sharesClass A Common StockSEC:0001473289-26-000016:2
900 sharesClass A Common StockSEC:0001473289-26-000016:3
515 sharesClass A Common StockSEC:0001473289-26-000016:4
685 sharesClass A Common StockSEC:0001473289-26-000016:5
600 sharesClass A Common StockSEC:0001473289-26-000016:6
3,167 sharesClass A Common StockSEC:0001473289-26-000016:7
2,633 sharesClass A Common StockSEC:0001473289-26-000016:8
25 of 159 declarations
About Seifert Thomas J
SEIFERT THOMAS J is Chief Financial Officer at Cloudflare, Inc., and he is also Director at Wolfspeed, INC. and IPG Photonics CORP. The declarant has 143 filings in total, and among the recent filings held here, all transactions are sales, for EUR 7560092 between 2021-05-12 and 2026-06-17, with notable filings at Cloudflare, Inc. of EUR 3707237.60405862, EUR 3433930.993592103, EUR 3379060.143493061, EUR 2826251.947805279, EUR 2437412.735484025 and EUR 1540408.273168869.
