Who
Thomas J. Seifert
Chief Financial Officer
Company insider
Files Form 4 as: Chief Financial Officer, Cloudflare; Director, Wolfspeed; Director, IPG Photonics; EVP & Chief Financial Officer, Gen Digital; SVP, CFO, Advanced Micro Devices.
In numbers
- Trades disclosed
- 1,423
- Buys
- 0
- Sells
- 145
- Bought
- $0
- Sold
- $348.2M
- Companies
- 5
- Companies where not an officer
- 2
- First trade
- 11 Nov 2002
- Last trade
- 19 Oct 2026
- Last filed
- 19 Oct 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 19 Oct 2026filed 19 Oct 2026 | NET Cloudflareoption or derivative · Cybersecurity | SEC FORM 4 Code M | —12,500 at $0.00 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Code M | $559K12,500 at $44.72 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $327K1,100 at $297.29 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $1.0M3,401 at $298.32 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $1.1M3,756 at $299.36 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $794K2,643 at $300.39 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $181K598 at $301.99 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $152K502 at $303.26 | filing |
| 19 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $152K500 at $304.15 | filing |
| 15 Oct 2026filed 19 Oct 2026 | NET CloudflareCybersecurity | SEC FORM 4 Code F | $931K2,944 at $316.32 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET CloudflareCybersecurity | SEC FORM 4 Code C | —10,000 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $878K2,632 at $333.62 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $625K1,868 at $334.59 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $201K600 at $335.32 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $34K100 at $336.51 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET Cloudflareoption or derivative · Cybersecurity | SEC FORM 4 Code M | —10,000 at $0.00 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET Cloudflareoption or derivative · Cybersecurity | SEC FORM 4 Code M | —10,000 at $0.00 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET Cloudflareoption or derivative · Cybersecurity | SEC FORM 4 Code C | —10,000 at $0.00 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $32K100 at $318.90 | filing |
| 17 Sep 2026filed 21 Sep 2026 | NET CloudflareCybersecurity | SEC FORM 4 Sold | $32K100 at $320.89 | filing |
The newest 500 lines are listed; the numbers count every line.
News
Cloudflare (NYSE:NET) CFO Sells 12,500 Shares of StockNET · tickerreport.com · 20 Oct 2026
0 headlines in the last 90 days name Thomas J. Seifert; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.