SKHY 0001193125-26-356133 6-K Filing: Aug 19, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF

THE SECURITIES EXCHANGE ACT OF 1934

FOR THE MONTH OF AUGUST 2026

Commission File Number: 001-43391

SK hynix Inc.

(Translation of registrant’s name into English)

2091, Gyeongchung-daero

Bubal-eup, Icheon-si

Gyeonggi-do 17336, Korea

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

Decision on Acquisition of Treasury Shares

On August 19, 2026, the board of directors (the “Board of Directors”) of SK hynix Inc. (the “Company”) approved the Company’s acquisition of treasury shares for the purpose of improving shareholder value through the cancellation of treasury shares.

1. Number of Treasury Shares to be Acquired		Common shares	24,070,000
		Other shares	—
2. Estimated Aggregate Acquisition Value (Won)		Common shares	40,004,340,000,000
		Other shares	—
3. Planned Acquisition Period		From	August 20, 2026
		To	November 19, 2026
4. Expected Holding Period		From	—
		To	—
5. Purpose of Acquisition			Improvement of shareholder value through cancellation of treasury shares
6. Method of Acquisition			Open-market purchase
7. Investment Brokerage Agent			SK Securities Co., Ltd.
8. Treasury Shares Held Before Acquisition	Acquisition within Limit Based on Maximum Amount of Dividends Payable	Common shares	1,625,696	Percentage of shares (%)	0.2
		Other shares	—	Percentage of shares (%)	—
	Other Acquisition	Common shares	73	Percentage of shares (%)	0.0
		Other shares	—	Percentage of shares (%)	—
9. Date of Acquisition Decision			August 19, 2026
- Attendance<br>of Independent Directors			Present: 6; Absent: 0
- Attendance<br>of Auditors (Audit Committee Members who are not Independent Directors)			—
10. Maximum Daily Purchase Order		Common shares	2,407,000
		Preferred shares	—

Other Matters Relating to an Investment Decision

-	This decision on acquisition of treasury shares concerns a new acquisition of treasury shares.<br>
-	The “Number of Treasury Shares to be Acquired” set forth in Item 1 above was calculated by dividing<br>the “Estimated Aggregate Acquisition Value (Won)” set forth in Item 2 above by the closing price of the Company’s common shares on the day prior to the date of the resolution by the Board of Directors (August 18, 2026: Won<br>1,662,000). The actual number of treasury shares acquired may change depending on future movements in the Company’s share price.
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-	The “Expected Holding Period” set forth in Item 4 above may change depending on various management<br>conditions, including the Company’s financial status and changes in the market environment. However, as this acquisition of treasury shares is for the purpose of cancellation, the Company plans to complete the acquisition within the<br>“Planned Acquisition Period” set forth in Item 3 above and cancel all treasury shares acquired during such period. For further details, please refer to the current report on Form 6-K titled<br>“Decision on Cancellation of Treasury Shares” furnished by the Company on August 19, 2026.
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-	The number of treasury shares set forth in “Treasury Shares Held Before Acquisition” set forth in<br>Item 8 above were acquired as a result of the exercise of the clean-up call option relating to the exchangeable bonds issued by the Company on April 11, 2023 in May 2026.
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-	The “Date of Acquisition Decision” set forth in Item 9 above is the date of the resolution by the<br>Board of Directors.
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-	The “Maximum Daily Purchase Order” set forth in Item 10 above was calculated in accordance with<br>Article 5-5 of the Regulation on Issuance and Disclosure of Securities as the lesser of the greater of (i) and (ii) below and (iii) below:
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(i)	10% of the number of shares reported for acquisition: 2,407,000 shares
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(ii)	25% of the average daily trading volume for the one-month period<br>preceding the day prior to the date of the resolution by the Board of Directors: 1,431,989 shares
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(iii)	1% of the total number of issued shares: 7,304,923 shares
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[Limit on Treasury Share Acquisition Amount]

(Unit: Won)

Category			Amount
1. Limit on distributable profit under the Commercial Act at the end of the previous fiscal<br>year		Net assets	117,318,562,193,943
		Capital	3,657,652,050,000
		Accumulated<br>capital reserve and earned reserve through the end of the previous fiscal year	9,867,146,544,188
		Unrealized<br>gains prescribed by Presidential Decree	12,239,000,231,484
		Subtotal	91,554,763,368,271
2. Treasury share acquisition amount since the end of the previous fiscal year			—
3. Dividends and related legal reserve resolved at the General Meeting of Shareholders since the<br>end of the previous fiscal year			1,538,579,052,713
4. Quarterly or interim dividends and related legal reserve resolved by the Board of Directors<br>since the end of the previous fiscal year			593,975,016,113
5. Trust contract amount			—
6. Acquisition cost of treasury shares disposed of since the end of the previous fiscal year<br>(weighted average method)			25,802,387,418
Total Limit on Treasury Share Acquisition Amount (1-2-3-4-5+6)			89,448,011,686,863
*	The “Limit on distributable profit limit under the Commercial Act at the end of the previous fiscal<br>year” set forth in Item 1 above was prepared based on the Company’s financial statements as of the end of fiscal year 2025.
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[Treasury Shares Held Prior to Decision on Acquisition of Treasury Shares]

(Unit: shares)

Method of acquisition				Type ofshares	Beginning	Change			End	Notes
						Acquired<br> <br>(+)	Disposed<br><br><br>(–)	Cancelled<br><br><br>(–)
Acquisition within limit based on maximum amount of dividends payable		Direct acquisition	Direct acquisition through stock exchange	Common shares	17,377,728	-	452,032	15,300,000	1,625,696	-
				Other shares	-	-	-	-	-	-
			Over-the-counter<br>acquisition	Common shares	-	-	-	-	-	-
				Other shares	-	-	-	-	-	-
			Tender offer	Common shares	-	-	-	-	-	-
				Other shares	-	-	-	-	-	-
			Subtotal (a)	Common shares	17,377,728	-	452,032	15,300,000	1,625,696	-
				Other shares	-	-	-	-	-	-
		Acquisition through broker	Held in trust by broker	Common shares	-	-	-	-	-	-
				Other shares	-	-	-	-	-	-
			Held by Company	Common shares	-	-	-	-	-	-
				Other shares	-	-	-	-	-	-
			Subtotal (b)	Common shares	-	-	-	-	-	-
				Other shares	-	-	-	-	-	-
Other acquisition (c)				Common shares	-	73	-	-	73	-
				Other shares	-	-	-	-	-	-
Total (a+b+c)				Common shares	17,377,728	73	452,032	15,300,000	1,625,769	-
				Other shares	-	-	-	-	-	-
*	The Company acquired 73 treasury shares in May 2026 through a fractional share settlement in connection with<br>the exercise of a clean-up call option relating to the exchangeable bonds issued by the Company on April 11, 2023.
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**	The “Beginning” amount above refers to the number of treasury shares held as of January 1,<br>2026, the beginning of the current fiscal year, and the “End” amount above refers to the number of treasury shares held as of August 19, 2026, the date of this report.
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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SK hynix Inc.
(Registrant)
By:	/s/ Seonghwan Park
(Signature)
Name: Seonghwan Park
Title: Head of Investor Relations

Date: August 19, 2026

SKHY 6-K