SEIFERT THOMAS J

SEC CIK
0001473289

Latest role at each company

Trades

Every Form 4 that lists SEIFERT THOMAS J as a reporting owner, including filings made jointly with others. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.

Insider trades
CompanyFiled (ET)Trade dateInsiderTransactionSharesAvg priceValueShares afterHolding changeFiling
NETCloudflare, Inc.Sep 21, 20264:50 PM ETSep 17, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$332.4617−$3.32M107.9K−8.5%SEC10b5-1
NETCloudflare, Inc.Aug 19, 20265:35 PM ETAug 17, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$307.3176−$3.07M110.85K−8.3%SEC10b5-1
NETCloudflare, Inc.Aug 6, 20267:03 PM ETAug 4, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−55K$300.2961−$16.52M113.79K−32.6%SEC10b5-1
NETCloudflare, Inc.Jul 17, 20267:01 PM ETJul 17, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$276.9195−$2.77M113.79K−8.1%SEC10b5-1
NETCloudflare, Inc.Jun 17, 2026Jun 17, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$232.388−$2.32M116.73K−7.9%SEC10b5-1
NETCloudflare, Inc.May 19, 2026May 18, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$200.6074−$2.01M212.01K−4.5%SEC10b5-1
NETCloudflare, Inc.Apr 17, 2026Apr 17, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$197.9777−$1.98M221.68K−4.3%SEC10b5-1
NETCloudflare, Inc.Mar 17, 2026Mar 17, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10.34K$212.3063−$2.2M224.63K−4.4%SEC10b5-1
NETCloudflare, Inc.Feb 24, 2026Feb 20, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−41.56K$185.0392−$7.69M85.45K−32.7%SEC10b5-1
NETCloudflare, Inc.Jan 21, 2026Jan 20, 2026SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$178.368−$1.78M137.49K−6.8%SEC10b5-1
NETCloudflare, Inc.Dec 23, 2025Dec 22, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$201.6956−$2.02M137.49K−6.8%SEC10b5-1
NETCloudflare, Inc.Nov 21, 2025Nov 20, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−41.56K$194.1825−$8.07M137.49K−23.2%SEC10b5-1
NETCloudflare, Inc.Oct 20, 2025Oct 20, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$211.8144−$2.12M189.52K−5.0%SEC10b5-1
NETCloudflare, Inc.Sep 22, 2025Sep 22, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$227.6473−$2.28M189.52K−5.0%SEC10b5-1
NETCloudflare, Inc.Aug 21, 2025Aug 20, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−41.56K$190.635−$7.92M189.52K−18.0%SEC10b5-1
NETCloudflare, Inc.Jul 29, 2025Jul 25 – Jul 28, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−60.73K$200.2955−$12.16M0−100.0%SEC10b5-1
NETCloudflare, Inc.Jul 22, 2025Jul 21, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$198.1293−$1.98M241.55K−4.0%SEC10b5-1
NETCloudflare, Inc.Jul 22, 2025Jul 21, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−34.27K$200.1747−$6.86M0−100.0%SEC10b5-1
NETCloudflare, Inc.Jun 23, 2025Jun 20, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$180.7575−$1.81M241.55K−4.0%SEC10b5-1
NETCloudflare, Inc.May 22, 2025May 20, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−41.56K$156.7809−$6.52M241.55K−14.7%SEC10b5-1
NETCloudflare, Inc.Apr 28, 2025Apr 25, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−10K$120.14−$1.2M293.58K−3.3%SEC10b5-1
NETCloudflare, Inc.Mar 21, 2025Mar 20, 2025SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−10K$120.00−$1.2M293.58K−3.3%SEC10b5-1
NETCloudflare, Inc.Mar 6, 2025Mar 5, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$141.7677−$2.13M293.58K−4.9%SEC10b5-1
NETCloudflare, Inc.Feb 19, 2025Feb 19, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−28.64K$162.0715−$4.64M293.58K−8.9%SEC10b5-1
NETCloudflare, Inc.Feb 5, 2025Feb 3, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$136.6277−$2.05M252.87K−5.6%SEC10b5-1
NETCloudflare, Inc.Jan 21, 2025Jan 17 – Jan 21, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−65K$119.7371−$7.78M252.87K−20.4%SEC10b5-1
NETCloudflare, Inc.Jan 6, 2025Jan 3, 2025SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$113.8071−$1.71M252.87K−5.6%SEC10b5-1
NETCloudflare, Inc.Dec 19, 2024Dec 18, 2024SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$112.7238−$1.69M252.87K−5.6%SEC10b5-1
NETCloudflare, Inc.Dec 5, 2024Dec 4, 2024SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$109.8961−$1.65M252.87K−5.6%SEC10b5-1
NETCloudflare, Inc.Nov 19, 2024Nov 19, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−28.64K$95.0248−$2.72M252.87K−10.2%SEC10b5-1
NETCloudflare, Inc.Nov 4, 2024Nov 4, 2024SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$86.7883−$1.3M281.4K−5.1%SEC10b5-1
NETCloudflare, Inc.Oct 21, 2024Oct 18, 2024SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$90.876−$1.36M281.4K−5.1%SEC10b5-1
NETCloudflare, Inc.Oct 4, 2024Oct 3, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$79.1932−$1.19M281.4K−5.1%SEC10b5-1
NETCloudflare, Inc.Sep 19, 2024Sep 18, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$78.3618−$1.18M281.4K−5.1%SEC10b5-1
NETCloudflare, Inc.Sep 5, 2024Sep 4, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$78.0538−$1.17M281.4K−5.1%SEC10b5-1
NETCloudflare, Inc.Aug 22, 2024Aug 20, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−28.64K$82.8372−$2.37M281.4K−9.2%SEC10b5-1
NETCloudflare, Inc.Aug 5, 2024Aug 2, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$78.7132−$1.18M309.94K−4.6%SEC10b5-1
NETCloudflare, Inc.Jul 19, 2024Jul 18, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$78.8919−$1.18M309.94K−4.6%SEC10b5-1
NETCloudflare, Inc.Jul 3, 2024Jul 3, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$84.9679−$1.27M309.94K−4.6%SEC10b5-1
NETCloudflare, Inc.Jun 24, 2024Jun 20, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$78.4699−$1.18M309.94K−4.6%SEC10b5-1
NETCloudflare, Inc.Jun 6, 2024Jun 5, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$69.1196−$1.04M309.94K−4.6%SEC10b5-1
NETCloudflare, Inc.May 21, 2024May 20, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−28.63K$75.1337−$2.15M309.94K−8.5%SEC10b5-1
NETCloudflare, Inc.May 6, 2024May 3, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$73.9652−$1.11M338.47K−4.2%SEC10b5-1
NETCloudflare, Inc.Apr 19, 2024Apr 18, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$87.0163−$1.31M338.47K−4.2%SEC10b5-1
NETCloudflare, Inc.Apr 4, 2024Apr 3, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$94.9103−$1.42M338.47K−4.2%SEC10b5-1
NETCloudflare, Inc.Mar 19, 2024Mar 15, 2024SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−15K$91.767−$1.38M338.47K−4.2%SEC10b5-1
NETCloudflare, Inc.Mar 19, 2024Mar 15, 2024SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−95K$91.7754−$8.72M0−100.0%SEC10b5-1
NETCloudflare, Inc.Mar 5, 2024Mar 4, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−15K$99.8743−$1.5M338.47K−4.2%SEC10b5-1
NETCloudflare, Inc.Feb 21, 2024Feb 20, 2024SEIFERT THOMAS JCHIEF FINANCIAL OFFICERSSaleClass A Common Stock−27.9K$96.5593−$2.69M338.47K−7.6%SEC10b5-1
NETCloudflare, Inc.Feb 12, 2024Feb 9, 2024SEIFERT THOMAS JChief Financial OfficerSSaleClass A Common Stock−50K$110.1149−$5.51M366.47K−12.0%SEC10b5-1