X0609 4 2026-10-15 0 0001477333 Cloudflare, Inc. NET 0001473289 SEIFERT THOMAS J false C/O CLOUDFLARE, INC. 405 COMAL STREET AUSTIN TX 78702 0 1 0 0 Chief Financial Officer 1 Class A Common Stock 2026-10-15 4 F 0 2944 316.32 D 104958 D Class A Common Stock 2026-10-19 4 M 0 12500 44.72 A 117458 D Class A Common Stock 2026-10-19 4 S 0 1100 297.2919 D 116358 D Class A Common Stock 2026-10-19 4 S 0 3401 298.3212 D 112957 D Class A Common Stock 2026-10-19 4 S 0 3756 299.3555 D 109201 D Class A Common Stock 2026-10-19 4 S 0 2643 300.3914 D 106558 D Class A Common Stock 2026-10-19 4 S 0 598 301.9943 D 105960 D Class A Common Stock 2026-10-19 4 S 0 502 303.2558 D 105458 D Class A Common Stock 2026-10-19 4 S 0 500 304.15 D 104958 D Class A Common Stock 92337 I See footnote Performance Stock Option (right to buy) 44.72 2026-10-19 4 M 0 12500 0 D 2032-02-13 Class A Common Stock 12500 487500 D The shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs. 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $296.84 to $297.75, 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 (9) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $297.90 to $298.85, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $298.93 to $299.92, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $299.93 to $300.91, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $301.55 to $302.29, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $302.57 to $303.56, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $303.91 to $304.48, inclusive. The shares are held of record by the 2026 Seifert Grantor Retained Annuity Trust dated May 27, 2026, for which the reporting person serves as trustee. The shares subject to the Performance Stock Option are comprised of nine separate tranches that become eligible to vest upon achievement of certain stock price targets (the "Stock Price Goals"). Upon satisfaction of a Stock Price Goal, 1/6 of the shares subject to the applicable tranche vests and becomes exercisable on each Issuer quarterly vesting date (2/15, 5/15, 8/15 or 11/15) occurring on or after the date of certification of achievement of the applicable Stock Price Goal for such tranche. As of the date of this report, six of the nine stock price goals have been satisfied and the underlying shares vest as set forth above. The remaining three tranches, representing 277,500 shares subject to the Performance Stock Option, become eligible to vest upon achievement of the applicable Stock Price Goal. /s/ Charlotte Bowe, by power of attorney 2026-10-19