X0609 4 2026-07-31 0 0002042022 WhiteFiber, Inc. WYFI 0002058414 Sanfilippo Thomas false C/O WHITEFIBER, INC 31 HUDSON YARDS FLOOR 11, SUITE 30 NEW YORK NY 10001 0 1 0 0 Chief Technology Officer 0 Ordinary Shares, $01 par value 2026-07-31 4 M 0 4412 A 21732 D Ordinary Shares, $01 par value 2026-08-05 4 F 0 1259 26.34 D 20473 D Restricted Stock Units 2026-07-31 4 M 0 4412 0 D Ordinary Shares 4412 39708 D Represents 4,412 Ordinary Shares, par value $0.01 per share, of the Issuer, which were issued upon vesting of Restricted Stock Units ("RSUs") on July 31, 2026, under the Issuer's 2025 Omnibus Equity Incentive Plan (the "Plan") pursuant to Rule 16b-3, of which a total of 30,880 have vested. RSUs convert into Ordinary Shares on a one-for-one basis. Represents Ordinary Shares, sold on August 5, 2026, to pay tax liability of the shares issued on July 31, 2026, upon the vesting of RSUs granted under the Issuer's Plan pursuant to Rule 16b-3. This does not represent a discretionary transaction by a reporting person. The price reported in Column 4 is a weighted average price. These Ordinary Shares were sold in multiple transactions at prices ranging from $26.33 to $26.36, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, with full information regarding the number of shares sold at each separate price within the range set forth in this footnote. On September 11, 2025, the Reporting Person was initially granted 70,588 RSUs, vesting in 12 equal quarterly installments with a one-year cliff, beginning on October 31, 2025. /s/ Thomas Sanfilippo 2026-10-16