Thomas J Seifert insider trades: Cloudflare (NET) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Thomas reports to the SEC
Open-market buys and sales
138 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 19, 2026 | NET | ↓ Sell | 12,500 | $299.59 | $3.7M | Direct | Oct 19, 2026 (0d) |
| Sep 17, 2026 | NET | ↓ Sell | 10,000 | $332.46 | $3.3M | Direct | Sep 21, 2026 (4d) |
| Aug 17, 2026 | NET | ↓ Sell | 10,000 | $307.32 | $3.1M | Direct | Aug 19, 2026 (2d) |
| Jul 17, 2026 | NET | ↓ Sell | 10,000 | $276.92 | $2.8M | Direct | Jul 17, 2026 (0d) |
| Jun 17, 2026 | NET | ↓ Sell | 10,000 | $232.39 | $2.3M | Direct | Jun 17, 2026 (0d) |
| May 18, 2026 | NET | ↓ Sell | 10,000 | $200.61 | $2.0M | Direct | May 19, 2026 (1d) |
| Apr 17, 2026 | NET | ↓ Sell | 10,000 | $197.98 | $2.0M | Direct | Apr 17, 2026 (0d) |
| Mar 17, 2026 | NET | ↓ Sell | 10,341 | $212.30 | $2.2M | Direct | Mar 17, 2026 (0d) |
| Feb 20, 2026 | NET | ↓ Sell | 41,557 | $185.04 | $7.7M | Direct | Feb 24, 2026 (4d) |
| Jan 20, 2026 | NET | ↓ Sell | 10,000 | $178.37 | $1.8M | Direct | Jan 21, 2026 (1d) |
| Dec 22, 2025 | NET | ↓ Sell | 10,000 | $201.69 | $2.0M | Direct | Dec 23, 2025 (1d) |
| Nov 20, 2025 | NET | ↓ Sell | 41,555 | $194.18 | $8.1M | Direct | Nov 21, 2025 (1d) |
| Oct 20, 2025 | NET | ↓ Sell | 10,000 | $211.81 | $2.1M | Direct | Oct 20, 2025 (0d) |
| Sep 22, 2025 | NET | ↓ Sell | 10,000 | $227.64 | $2.3M | Direct | Sep 22, 2025 (0d) |
| Aug 20, 2025 | NET | ↓ Sell | 41,555 | $190.64 | $7.9M | Direct | Aug 21, 2025 (1d) |
| Jul 28, 2025 | NET | ↓ Sell | 59,530 | $200.30 | $11.9M | Indirect | Jul 29, 2025 (1d) |
| Jul 21, 2025 | NET | ↓ Sell | 34,270 | $200.17 | $6.9M | Indirect | Jul 22, 2025 (1d) |
| Jul 21, 2025 | NET | ↓ Sell | 10,000 | $198.13 | $2.0M | Direct | Jul 22, 2025 (1d) |
| Jun 20, 2025 | NET | ↓ Sell | 10,000 | $180.76 | $1.8M | Direct | Jun 23, 2025 (3d) |
| May 20, 2025 | NET | ↓ Sell | 41,556 | $156.78 | $6.5M | Direct | May 22, 2025 (2d) |
| Apr 25, 2025 | NET | ↓ Sell | 10,000 | $120.14 | $1.2M | Direct | Apr 28, 2025 (3d) |
| Mar 20, 2025 | NET | ↓ Sell | 10,000 | $120.00 | $1.2M | Direct | Mar 21, 2025 (1d) |
| Mar 5, 2025 | NET | ↓ Sell | 15,000 | $141.77 | $2.1M | Direct | Mar 6, 2025 (1d) |
| Feb 19, 2025 | NET | ↓ Sell | 28,635 | $162.07 | $4.6M | Direct | Feb 19, 2025 (0d) |
| Feb 3, 2025 | NET | ↓ Sell | 15,000 | $136.63 | $2.0M | Direct | Feb 5, 2025 (2d) |
| Jan 21, 2025 | NET | ↓ Sell | 65,000 | $119.74 | $7.8M | Direct | Jan 21, 2025 (0d) |
| Jan 3, 2025 | NET | ↓ Sell | 15,000 | $113.81 | $1.7M | Direct | Jan 6, 2025 (3d) |
| Dec 18, 2024 | NET | ↓ Sell | 15,000 | $112.72 | $1.7M | Direct | Dec 19, 2024 (1d) |
| Dec 4, 2024 | NET | ↓ Sell | 15,000 | $109.90 | $1.6M | Direct | Dec 5, 2024 (1d) |
| Nov 19, 2024 | NET | ↓ Sell | 28,635 | $95.03 | $2.7M | Direct | Nov 19, 2024 (0d) |
| Nov 4, 2024 | NET | ↓ Sell | 15,000 | $86.79 | $1.3M | Direct | Nov 4, 2024 (0d) |
| Oct 18, 2024 | NET | ↓ Sell | 15,000 | $90.88 | $1.4M | Direct | Oct 21, 2024 (3d) |
| Oct 3, 2024 | NET | ↓ Sell | 15,000 | $79.19 | $1.2M | Direct | Oct 4, 2024 (1d) |
| Sep 18, 2024 | NET | ↓ Sell | 15,000 | $78.36 | $1.2M | Direct | Sep 19, 2024 (1d) |
| Sep 4, 2024 | NET | ↓ Sell | 15,000 | $78.05 | $1.2M | Direct | Sep 5, 2024 (1d) |
| Aug 20, 2024 | NET | ↓ Sell | 28,636 | $82.84 | $2.4M | Direct | Aug 22, 2024 (2d) |
| Aug 2, 2024 | NET | ↓ Sell | 15,000 | $78.71 | $1.2M | Direct | Aug 5, 2024 (3d) |
| Jul 18, 2024 | NET | ↓ Sell | 15,000 | $78.89 | $1.2M | Direct | Jul 19, 2024 (1d) |
| Jul 3, 2024 | NET | ↓ Sell | 15,000 | $84.97 | $1.3M | Direct | Jul 3, 2024 (0d) |
| Jun 20, 2024 | NET | ↓ Sell | 15,000 | $78.47 | $1.2M | Direct | Jun 24, 2024 (4d) |
| Jun 5, 2024 | NET | ↓ Sell | 15,000 | $69.12 | $1.0M | Direct | Jun 6, 2024 (1d) |
| May 20, 2024 | NET | ↓ Sell | 28,634 | $75.13 | $2.2M | Direct | May 21, 2024 (1d) |
| May 3, 2024 | NET | ↓ Sell | 15,000 | $73.97 | $1.1M | Direct | May 6, 2024 (3d) |
| Apr 18, 2024 | NET | ↓ Sell | 15,000 | $87.02 | $1.3M | Direct | Apr 19, 2024 (1d) |
| Apr 3, 2024 | NET | ↓ Sell | 15,000 | $94.91 | $1.4M | Direct | Apr 4, 2024 (1d) |
| Mar 15, 2024 | NET | ↓ Sell | 95,000 | $91.77 | $8.7M | Indirect | Mar 19, 2024 (4d) |
| Mar 15, 2024 | NET | ↓ Sell | 15,000 | $91.77 | $1.4M | Direct | Mar 19, 2024 (4d) |
| Mar 4, 2024 | NET | ↓ Sell | 15,000 | $99.87 | $1.5M | Direct | Mar 5, 2024 (1d) |
| Feb 20, 2024 | NET | ↓ Sell | 27,901 | $96.56 | $2.7M | Direct | Feb 21, 2024 (1d) |
| Feb 9, 2024 | NET | ↓ Sell | 50,000 | $110.11 | $5.5M | Direct | Feb 12, 2024 (3d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other NET insiders
Open-market trades in the last 12 months
About Thomas J Seifert's insider trades
Thomas J Seifert is Chief Financial Officer at Cloudflare (NET). Since Nov 11, 2002, Thomas has reported no open-market purchases and 138 sales worth $285.3M on SEC Form 4. In the last 12 months: 12 sales ($41.0M).
1 sale (1% of the value sold) was made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so it says little about how the insider sees the stock today.
Their filings also include option exercises (138 filings), conversions (130 filings), grants and awards (30 filings), shares withheld for taxes (26 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every NET insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.