WhiteFiber president reports tax withholding share sale

WhiteFiber, Inc. President Billy Krassakopoulos reported a routine tax‑withholding share disposition.

Rhea-AI Filing Summary

WhiteFiber, Inc. President Billy Krassakopoulos reported a routine tax‑withholding share disposition. On April 28, 2026, 8,490 Ordinary Shares were sold by the issuer at an average price of $15.48 solely to cover tax obligations from RSU vesting.

Footnotes state this was not a discretionary sale by the reporting person. After this transaction, Krassakopoulos directly holds 18,937 Ordinary Shares, and no derivative positions are shown in this filing.

Insider Trade Summary

Exercise Price or Tax Liability: 8,490 shares

Exercise Price or Tax Liability 1 txn

Insider Krassakopoulos Billy

Role President

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Ordinary Shares, $.01 par value	8,490	$0.00	$0.00

Holdings After Transaction: Ordinary Shares, $.01 par value — 18,937 shares (Direct)

Footnotes (2)

1. F1. Represents Ordinary Shares sold by the issuer solely to satisfy tax withholding obligations in connection with the net issuance of Ordinary Shares delivered to the Reporting Person on March 16, 2026, from the vesting of RSUs, and does not represent a sale by the Reporting Person
2. F2. These shares were sold at $15.48 the average market price on April 28, 2026. This does not represent a discretionary transaction by a reporting person.

Key Figures

Shares sold for tax withholding: 8,490 shares Average sale price: $15.48 per share Shares held after transaction: 18,937 shares +1 more

4 metrics

Shares sold for tax withholding 8,490 shares Ordinary Shares sold on April 28, 2026 to satisfy tax obligations

Average sale price $15.48 per share Average market price on April 28, 2026

Shares held after transaction 18,937 shares Direct ownership following April 28, 2026 Form 4 transaction

Tax withholding shares 8,490 shares Transaction code F, tax withholding disposition per Form 4 summary

Key Terms

tax withholding obligations, RSUs, net issuance, non-derivative, +1 more

5 terms

tax withholding obligations financial

"sold by the issuer solely to satisfy tax withholding obligations in connection with the net issuance"

RSUs financial

"delivered to the Reporting Person on March 16, 2026, from the vesting of RSUs"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

net issuance financial

"solely to satisfy tax withholding obligations in connection with the net issuance of Ordinary Shares"

non-derivative financial

"transaction_type": "non-derivative""

transaction code F regulatory

"transaction_code": "F""

FAQ

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

What insider transaction did WhiteFiber (WYFI) report for Billy Krassakopoulos?

WhiteFiber reported that 8,490 Ordinary Shares were sold on April 28, 2026 to satisfy tax withholding obligations from RSU vesting. Footnotes clarify this sale was executed by the issuer and not a discretionary sale by President Billy Krassakopoulos.

Was the WhiteFiber (WYFI) Form 4 sale by President Billy Krassakopoulos discretionary?

The Form 4 specifies the transaction was not discretionary. Shares were sold by the issuer solely to cover tax withholding for vested RSUs, meaning Krassakopoulos did not choose sale timing or amount as a market trade decision.

How many WhiteFiber (WYFI) shares were sold for tax withholding and at what price?

The filing shows 8,490 Ordinary Shares were sold at an average market price of $15.48 on April 28, 2026. According to the footnotes, this was done solely to satisfy tax withholding obligations related to RSU vesting.

How many WhiteFiber (WYFI) shares does Billy Krassakopoulos hold after the reported transaction?

After the reported tax‑withholding disposition, President Billy Krassakopoulos directly holds 18,937 Ordinary Shares. The Form 4 shows this as the total number of shares owned following the April 28, 2026 transaction, with no derivative holdings listed.

What does the F transaction code mean in the WhiteFiber (WYFI) Form 4?

In this Form 4, the F code indicates a tax‑withholding disposition. The issuer sold 8,490 shares on behalf of the reporting person to cover tax liabilities from RSU vesting, rather than an open‑market sale initiated by the insider.

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

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Accepted by SEC EDGAR 04/29/2026 - 09:28 AM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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^*

Krassakopoulos Billy

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/28/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares, $.01 par value	04/28/2026	04/28/2026	F		8,490(1)	D	(2)	18,937	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents Ordinary Shares sold by the issuer solely to satisfy tax withholding obligations in connection with the net issuance of Ordinary Shares delivered to the Reporting Person on March 16, 2026, from the vesting of RSUs, and does not represent a sale by the Reporting Person

2. These shares were sold at $15.48 the average market price on April 28, 2026. This does not represent a discretionary transaction by a reporting person.

	/s/ Billy Krassakopoulos	04/29/2026
	** Signature of Reporting Person	Date
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)