Magnachip CEO Lee Chae buys 100,000 shares

Rhea-AI Filing Summary

Magnachip Semiconductor Corp. (MX) Chief Executive Officer Lee Chae reported direct purchases of 100,000 common shares in three transactions: 50,000 shares at $3.1700 and 30,000 shares at $3.1866 on September 23, 2026, then 20,000 shares at $3.2199 on September 24, 2026. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Net Buyer: 100,000 shares

Net Buy 3 txns

Insider LEE CHAE

Role Chief Executive Officer

Bought 100,000 shs ($318K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	20,000	$3.2199	$64K
Purchase	Common Stock	50,000	$3.17	$159K
Purchase	Common Stock	30,000	$3.1866	$96K

Holdings After Transaction: Common Stock — 388,750 shares (Direct)

Key Figures

Shares purchased: 100,000 shares Purchase: 50,000 shares at $3.1700 per share Purchase: 30,000 shares at $3.1866 per share +1 more

4 metrics

Shares purchased 100,000 shares Three direct transactions by Lee Chae

Purchase 50,000 shares at $3.1700 per share September 23, 2026

Purchase 30,000 shares at $3.1866 per share September 23, 2026

Purchase 20,000 shares at $3.2199 per share September 24, 2026

Key Terms

Common Stock, Rule 10b5-1 plan, open market or private transaction

3 terms

Common Stock financial

"purchases of Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Rule 10b5-1 plan regulatory

"No Rule 10b5-1 plan is reported"

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

open market or private transaction financial

"Purchase in open market or private transaction"

FAQ

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

How many shares did MX CEO Lee Chae buy?

Lee Chae purchased 100,000 shares of Magnachip Semiconductor Corp. common stock in three direct transactions on September 23 and 24, 2026. He purchased 50,000 shares and 30,000 shares on September 23, followed by 20,000 shares on September 24.

What prices did MX CEO Lee Chae pay for the shares?

On September 23, 2026, Lee Chae purchased 50,000 shares at $3.1700 per share and 30,000 shares at $3.1866 per share. On September 24, 2026, he purchased 20,000 shares at $3.2199 per share.

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

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Available on EDGAR 09/25/2026 - 04:43 PM Accepted by SEC EDGAR 09/25/2026 - 04:15 PM 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^*

LEE CHAE

(Last) (First) (Middle)

C/O MAGNACHIP SEMICONDUCTOR, LTD.

108, YEOUI-DAERO, YEONGDEUNGPO-GU

(Street)

SEOUL 07335

(City) (State) (Zip)

KOREA, REPUBLIC OF

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/23/2026

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
Common Stock	09/23/2026		P		50,000	A	$3.17	338,750	D
Common Stock	09/23/2026		P		30,000	A	$3.1866	368,750	D
Common Stock	09/24/2026		P		20,000	A	$3.2199	388,750	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:

	/s/ Shinyoung Park, Attorney-in-Fact	09/25/2026
	** 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)