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WhiteFiber: Thomas Sanfilippo sells 1,259 shares

The tax-related sale followed an RSU vesting, and the reported weighted-average sale price was $26.34 per share.

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Form Type
4

Rhea-AI Filing Summary

WhiteFiber, Inc. Chief Technology Officer Thomas Sanfilippo received 4,412 ordinary shares when 4,412 RSUs vested on July 31, 2026; the RSU row reports 39,708 RSUs following the transaction. On August 5, he sold 1,259 ordinary shares to pay tax liability at a weighted-average price of $26.34 per share, with transaction prices ranging from $26.33 to $26.36, inclusive. The footnote says the sale was not discretionary, and no Rule 10b5-1 plan is reported.

Insider Sanfilippo Thomas
Role Chief Technology Officer
Type Security Shares Price Value
Tax Withholding Ordinary Shares, $01 par value F4, F3 1,259 $26.34 $33K
Exercise Restricted Stock Units F2, F5 4,412 $0.00 $0.00
Exercise Ordinary Shares, $01 par value F1, F2 4,412 -- --
Holdings After Transaction: Restricted Stock Units — 39,708 contracts (Direct); Ordinary Shares, $01 par value — 20,473 shares (Direct)
Footnotes (5)
  1. F1. 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.
  2. F2. RSUs convert into Ordinary Shares on a one-for-one basis.
  3. F3. 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.
  4. F4. 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.
  5. F5. 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.
Ordinary shares issued upon RSU vesting 4,412 shares July 31, 2026
RSUs following transaction 39,708 RSUs After the July 31, 2026 vesting transaction
Shares sold for tax liability 1,259 shares August 5, 2026
Weighted-average sale price $26.34 per share August 5, 2026 transactions
Sale price range $26.33 to $26.36 per share Inclusive range for the August 5, 2026 transactions
RSUs vested 30,880 RSUs Total stated in the RSU vesting footnote
Initial RSU grant 70,588 RSUs Granted September 11, 2025
Quarterly vesting installments 12 installments Equal quarterly installments with a one-year cliff
Restricted Stock Units technical
"vesting of Restricted Stock Units ("RSUs")"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
Rule 16b-3 regulatory
"pursuant to Rule 16b-3"
Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.
weighted average price financial
"The price reported in Column 4 is a weighted average price"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
one-year cliff technical
"with a one-year cliff"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many WYFI shares did Thomas Sanfilippo sell?

On August 5, 2026, Sanfilippo sold 1,259 ordinary shares to pay tax liability. The weighted-average price was $26.34 per share, and prices ranged from $26.33 to $26.36, inclusive. The footnote says the sale was not discretionary, and no Rule 10b5-1 plan is reported.

How many WYFI shares did Thomas Sanfilippo receive from RSUs?

On July 31, 2026, 4,412 RSUs vested and 4,412 ordinary shares were issued on a one-for-one basis. The RSU row reports 39,708 RSUs following the transaction.

What was Thomas Sanfilippo's WYFI RSU vesting schedule?

Sanfilippo was initially granted 70,588 RSUs on September 11, 2025, vesting in 12 equal quarterly installments with a one-year cliff, beginning October 31, 2025.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Sanfilippo Thomas

(Last)(First)(Middle)
C/O WHITEFIBER, INC 31 HUDSON YARDS
FLOOR 11, SUITE 30

(Street)
NEW YORK NEW YORK 10001

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
WhiteFiber, Inc. [ WYFI ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Technology Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/31/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Ordinary Shares, $01 par value07/31/2026M4,412(1)A(2)21,732D
Ordinary Shares, $01 par value08/05/2026F(4)1,259(3)D$26.34(4)20,473D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(2)07/31/2026M4,412 (5) (5)Ordinary Shares4,412$039,708D
Explanation of Responses:
1. 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.
2. RSUs convert into Ordinary Shares on a one-for-one basis.
3. 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.
4. 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.
5. 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 Sanfilippo10/16/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

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