Magnachip Semiconductor (MX) CFO has shares withheld for tax on vesting

Rhea-AI Filing Summary

Magnachip Semiconductor Corp. reported insider equity activity by its Chief Financial Officer, Shin Young Park. On 12/31/2025, the company withheld shares of common stock to cover the CFO's tax obligations arising from vesting awards. The issuer withheld 6,121 shares from a vesting of 12,508 shares originally granted on February 16, 2023, 12,234 shares from a vesting of 25,000 shares granted on June 1, 2024, and 17,977 shares from a vesting of 36,736 shares granted on June 1, 2025, each at a price of $2.55 per share. After these transactions, the reporting person beneficially owned 215,454 shares of common stock directly. These withholdings are routine administrative transactions to satisfy tax liabilities rather than open-market purchases or sales.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Park Shin Young

Role See Remarks

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	6,121	$2.55	$16K
Tax Withholding	Common Stock	12,234	$2.55	$31K
Tax Withholding	Common Stock	17,977	$2.55	$46K

Holdings After Transaction: Common Stock — 245,665 shares (Direct)

Footnotes (1)

1. This transaction represents the withholding by the Issuer of 6,121 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 12,508 shares of common stock originally awarded to the Reporting Person on February 16, 2023. This transaction represents the withholding by the Issuer of 12,234 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 25,000 shares of common stock originally awarded to the Reporting Person on June 1, 2024. This transaction represents the withholding by the Issuer of 17,977 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 36,736 shares of common stock originally awarded to the Reporting Person on June 1, 2025.

Form 4 Insider Transactions: What Each Field Means →

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^*

Park Shin Young

(Last) (First) (Middle)

C/O MAGNACHIP SEMICONDUCTOR, LTD.,

108, YEOUI-DAERO, YEONGDEUNGPO-GU

(Street)

SEOUL M5 07335

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MAGNACHIP SEMICONDUCTOR Corp [ MX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

3. Date of Earliest Transaction (Month/Day/Year)
12/31/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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
Common Stock	12/31/2025		F		6,121(1)	D	$2.55	245,665	D
Common Stock	12/31/2025		F		12,234(2)	D	$2.55	233,431	D
Common Stock	12/31/2025		F		17,977(3)	D	$2.55	215,454	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. This transaction represents the withholding by the Issuer of 6,121 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 12,508 shares of common stock originally awarded to the Reporting Person on February 16, 2023.

2. This transaction represents the withholding by the Issuer of 12,234 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 25,000 shares of common stock originally awarded to the Reporting Person on June 1, 2024.

3. This transaction represents the withholding by the Issuer of 17,977 shares of common stock to satisfy tax withholding obligations incurred by the Reporting Person upon the vesting of 36,736 shares of common stock originally awarded to the Reporting Person on June 1, 2025.

Remarks:

Chief Financial Officer

	/s/ Shin Young Park	01/02/2026
	** 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.

FAQ

What insider activity did Magnachip Semiconductor (MX) report in this Form 4?

The filing reports that the Chief Financial Officer, Shin Young Park, had shares of Magnachip Semiconductor Corp. common stock withheld by the company on 12/31/2025 to cover tax obligations tied to vesting equity awards.

How many Magnachip (MX) shares were withheld to cover the CFO's taxes?

The issuer withheld 6,121 shares, 12,234 shares, and 17,977 shares of common stock in three separate transactions on 12/31/2025, each at a price of $2.55 per share, to satisfy tax withholding obligations.

Were these Magnachip (MX) insider transactions open-market trades?

No. The filing explains that each transaction represents withholding by the issuer of common stock to satisfy the CFO's tax withholding obligations upon vesting of previously granted stock awards, rather than open-market buying or selling.

What is the CFO's Magnachip (MX) share ownership after these transactions?

Following the reported withholding transactions on 12/31/2025, the Chief Financial Officer beneficially owned 215,454 shares of Magnachip Semiconductor Corp. common stock directly.

Which equity awards triggered the tax withholding for the Magnachip (MX) CFO?

The tax withholding arose from vesting of awards originally granted on February 16, 2023 (12,508 shares), June 1, 2024 (25,000 shares), and June 1, 2025 (36,736 shares) to the Chief Financial Officer.

What is the CFO's role and relationship to Magnachip Semiconductor (MX)?

The reporting person in the filing is an officer of Magnachip Semiconductor Corp., serving as its Chief Financial Officer, and the Form 4 is filed for one reporting person.