Form 4 for NET Cloudflare, Inc.
Accepted 2026-09-21 16:50:25 ET · period of report 2026-09-17 · accession 0001473289-26-000029 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-09-21 16:50 | 2026-09-17 | NET | SEIFERT THOMAS J | CFO | C - Cnv Deriv | — | +10.0K | 117.9K | +9% | — |
| DMT | 2026-09-21 16:50 | 2026-09-17 | NET | SEIFERT THOMAS J | CFO | S - Sale | $332.46 | -10.0K | 107.9K | -8% | -$3.32M |
| DMT | 2026-09-21 16:50 | 2026-09-17 | NET | SEIFERT THOMAS J | CFO | M - OptEx | $0.00 | 0 | 18.9K | New | $0 |
| DT | 2026-09-21 16:50 | 2026-09-17 | NET | SEIFERT THOMAS J | CFO | C - Cnv Deriv | $0.00 | -10.0K | 8,925 | -53% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Class A Common Stock | 2026-09-17 | C | A | 10,000 | — | 117,902 | D | — | — | (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. |
| 2 | Common | Class A Common Stock | 2026-09-17 | S | D | 100 | $318.90 | 117,802 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. |
| 3 | Common | Class A Common Stock | 2026-09-17 | S | D | 100 | $320.89 | 117,702 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. |
| 4 | Common | Class A Common Stock | 2026-09-17 | S | D | 100 | $326.56 | 117,602 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. |
| 5 | Common | Class A Common Stock | 2026-09-17 | S | D | 300 | $328.04 | 117,302 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.80 to $328.16, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (10) to this Form 4. |
| 6 | Common | Class A Common Stock | 2026-09-17 | S | D | 700 | $329.37 | 116,602 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F4) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.81 to $329.69, inclusive. |
| 7 | Common | Class A Common Stock | 2026-09-17 | S | D | 700 | $330.23 | 115,902 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F5) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.85 to $330.73, inclusive. |
| 8 | Common | Class A Common Stock | 2026-09-17 | S | D | 1,196 | $331.59 | 114,706 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.09 to $332.07, inclusive. |
| 9 | Common | Class A Common Stock | 2026-09-17 | S | D | 1,604 | $332.50 | 113,102 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F7) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.09 to $333.06, inclusive. |
| 10 | Common | Class A Common Stock | 2026-09-17 | S | D | 2,632 | $333.62 | 110,470 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F8) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.11 to $334.10, inclusive. |
| 11 | Common | Class A Common Stock | 2026-09-17 | S | D | 1,868 | $334.59 | 108,602 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F9) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.14 to $335.12, inclusive. |
| 12 | Common | Class A Common Stock | 2026-09-17 | S | D | 600 | $335.32 | 108,002 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. (F10) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.16 to $335.53, inclusive. |
| 13 | Common | Class A Common Stock | 2026-09-17 | S | D | 100 | $336.51 | 107,902 | D | — | — | (F2) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025. |
| 14 | Derivative | Employee Stock Option (right to buy) | 2026-09-17 | M | D | 10,000 | $0.00 | 0 | D | $2.04 · — to 2027-07-25 | 10,000 Class B Common Stock | (F12) Shares subject to the option are fully vested and immediately exercisable. (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. |
| 15 | Derivative | Class B Common Stock | 2026-09-17 | M | A | 10,000 | $0.00 | 18,925 | D | — · — to — | 10,000 Class A Common Stock | (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. |
| 16 | Derivative | Class B Common Stock | 2026-09-17 | C | D | 10,000 | $0.00 | 8,925 | D | — · — to — | 10,000 Class A Common Stock | (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. (F1) Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date. |