Thomas J Seifert sold $2.0M of NET
Chief Financial Officer at Cloudflare, Inc.. 10,000 shares at an average of $201.69, traded Dec 22, 2025, filed Dec 23, 2025.
Score components
- +22RoleCFO
- +25Trade size$2.0M at market
- 0Share of holdings soldSold 6.8% of holdings
- +15Cluster5 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001473289-25-000017, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 22, 2025 | CConversion Class A Common Stock10b5-1 | +10,000 | - | - | 147,486 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -353 | $198.64 | $70k | 147,133 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -1,000 | $200.58 | $201k | 146,133 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -4,836 | $201.52 | $975k | 141,297 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -3,328 | $202.37 | $673k | 137,969 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Class A Common Stock10b5-1 | -483 | $203.35 | $98k | 137,486 | Dec 23, 2025 |
| Dec 22, 2025 | MOption exercise Employee Stock Option (right to buy)derivative10b5-1 | -10,000 | $0.00 | $0 | 90,341 | Dec 23, 2025 |
| Dec 22, 2025 | MOption exercise Class B Common Stockderivative10b5-1 | +10,000 | $0.00 | $0 | 18,925 | Dec 23, 2025 |
| Dec 22, 2025 | CConversion Class B Common Stockderivative10b5-1 | -10,000 | $0.00 | $0 | 8,925 | Dec 23, 2025 |
Related signals
Other insiders at Cloudflare, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 38Weak | Cloudflare, Inc. | Michelle Zatlyn President and Board Co-Chair | $35M 99,009 shares | -96% | |
| 35Weak | Cloudflare, Inc. | Carl Ledbetter director | $1.8M 5,000 shares | -1% | |
| 27Weak | Cloudflare, Inc. | Thomas J Seifert Chief Financial Officer | $3.3M 10,000 shares | -8% | |
| 35Weak | Cloudflare, Inc. | Carl Ledbetter director | $1.6M 5,000 shares | -1% | |
| 45Moderate | Cloudflare, Inc. | Michelle Zatlyn PRESIDENT & BOARD CO-CHAIR | $28M 99,009 shares | -96% | |
| 35Weak | Cloudflare, Inc. | Carl Ledbetter director | $1.8M 8,866 shares | -1% | |
| 26Weak | Cloudflare, Inc. | Katrin Suder director | $406k 2,031 shares | -5% | |
| 13Weak | Cloudflare, Inc. | John Graham-Cumming director | $502k 2,520 shares | -1% | |
| 45Moderate | Cloudflare, Inc. | Michelle Zatlyn President and Board Co-Chair | $16M 76,923 shares | -153% | |
| 65Notable | Cloudflare, Inc. | Matthew Prince CEO & Board Co-Chair | $32M 157,152 shares | -300% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.