SK hynix completes 40 trillion won share buyback

The reported average acquisition price was Won 1,688,426 per share, and the actual total excluded brokerage commissions.

Rhea-AI Filing Summary

SK hynix Inc. acquired 23,693,272 common shares as treasury shares through open-market purchases from August 20, 2026, to October 21, 2026. The actual aggregate acquisition price was Won 40,004,339,063,500, excluding brokerage commissions. The report compares this with the estimated Won 40,004,340,000,000 in the initial report and states that the difference is less than the price of one share.

The reported average acquisition price was Won 1,688,426 per share, and SK Securities Co., Ltd. was the investment brokerage agent. An accompanying table lists 25,319,041 common shares, or 3.47% of total shares, under direct acquisition.

Key Figures

Common shares acquired: 23,693,272 shares Actual aggregate acquisition price: Won 40,004,339,063,500 Average acquisition price per share: Won 1,688,426 +3 more

6 metrics

Common shares acquired 23,693,272 shares Treasury shares acquired through open-market purchases from August 20, 2026, to October 21, 2026

Actual aggregate acquisition price Won 40,004,339,063,500 Excludes brokerage commissions

Average acquisition price per share Won 1,688,426 Acquisition period from August 20, 2026, to October 21, 2026

Direct acquisition common shares 25,319,041 shares Listed as 3.47% of total shares

Direct acquisition percentage of total shares 3.47% Common shares

Common shares ordered 23,722,080 shares Acquisition period from August 20, 2026, to October 21, 2026

Key Terms

treasury shares, open-market purchases, aggregate acquisition price

3 terms

treasury shares financial

"acquired treasury shares through open-market purchases"

Treasury shares are a company’s own stock that it has repurchased and keeps on its books instead of canceling or leaving in the hands of outside investors. Think of them like coupons a business puts back in a drawer: they don’t vote or receive dividends while held, but they can be reissued later for employee pay or fundraising. For investors this matters because buybacks change the number of shares that count toward earnings and ownership, can boost per‑share metrics, and use corporate cash that might otherwise go to growth or dividends.

open-market purchases financial

"treasury shares through open-market purchases"

Open-market purchases are when a company or institution buys its own shares or other securities using the public stock market rather than through a private deal. For investors this matters because such buying reduces the number of shares available, often boosting metrics like earnings per share and signaling management thinks the stock is undervalued, while also using cash that might otherwise fund growth or dividends — like a business buying back chips at the table to increase each remaining player's stake.

aggregate acquisition price financial

"actual aggregate acquisition price, which does not include brokerage commissions"

FAQ

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

How many treasury shares did SKHY acquire, and what was the aggregate price?

SK hynix Inc. acquired 23,693,272 common shares through open-market purchases from August 20, 2026, to October 21, 2026, for an actual aggregate acquisition price of Won 40,004,339,063,500, excluding brokerage commissions.

What was SKHY's average acquisition price per share?

The reported average acquisition price was Won 1,688,426 per share across purchases made from August 20, 2026, to October 21, 2026.

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

Form 6-K: How Foreign Companies Report to the SEC →

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Available on EDGAR 10/26/2026 - 06:06 AM EDT Accepted by SEC EDGAR 10/26/2026 - 06:06 AM EDT Learn about SEC filing dates

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 OCTOBER 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 ☐

Report on Acquisition of Treasury Shares

From August 20, 2026 to October 21, 2026, SK hynix Inc. (the “Company”) acquired treasury shares through open-market purchases.

1. Report on Acquisition

A. Date of the Report of Decision on Acquisition of Treasury Shares (the “Initial Report”): August 19, 2026 (please refer to the current report on Form 6-K titled “Decision on Acquisition of Treasury Shares” furnished by the Company on August 19, 2026.)

B. Period of Acquisition (based on order execution dates): August 20, 2026 to October 21, 2026

2. Details of Acquisition

(Unit: in Won and shares)

Date(1)		Type		Number of Shares Ordered		Number of Shares Acquired		Acquisition Price  Per Share(2)(3)		Aggregate Acquisition Price(3)		Investment Brokerage Agent
August 20, 2026		Common shares		650,000		650,000		1,678,171		1,090,818,241,000		SK Securities Co., Ltd.
August 21, 2026		Common shares		650,000		650,000		1,743,847		1,133,500,665,500		SK Securities Co., Ltd.
August 24, 2026		Common shares		650,000		650,000		1,713,617		1,113,851,100,500		SK Securities Co., Ltd.
August 25, 2026		Common shares		650,000		650,000		1,612,261		1,047,970,079,500		SK Securities Co., Ltd.
August 26, 2026		Common shares		650,000		650,000		1,706,257		1,109,067,395,000		SK Securities Co., Ltd.
August 27, 2026		Common shares		650,000		650,000		1,740,272		1,131,177,449,500		SK Securities Co., Ltd.
August 28, 2026		Common shares		650,000		650,000		1,695,207		1,101,885,078,500		SK Securities Co., Ltd.
August 31, 2026		Common shares		650,000		650,000		1,621,174		1,053,763,304,500		SK Securities Co., Ltd.
September 1, 2026		Common shares		650,000		650,000		1,689,588		1,098,232,791,500		SK Securities Co., Ltd.
September 2, 2026		Common shares		650,000		650,000		1,632,550		1,061,158,025,000		SK Securities Co., Ltd.
September 3, 2026		Common shares		650,000		650,000		1,624,533		1,055,946,537,500		SK Securities Co., Ltd.
September 4, 2026		Common shares		650,000		650,000		1,647,544		1,070,904,063,500		SK Securities Co., Ltd.
September 7, 2026		Common shares		650,000		650,000		1,751,261		1,138,319,709,500		SK Securities Co., Ltd.
September 8, 2026		Common shares		650,000		650,000		1,854,029		1,205,119,277,500		SK Securities Co., Ltd.
September 9, 2026		Common shares		650,000		650,000		1,853,428		1,204,728,719,000		SK Securities Co., Ltd.

September 10, 2026		Common shares		600,000		600,000		1,847,731		1,108,638,900,500		SK Securities Co., Ltd.
September 11, 2026		Common shares		600,000		600,000		1,787,079		1,072,247,677,000		SK Securities Co., Ltd.
September 14, 2026		Common shares		600,000		600,000		1,717,202		1,030,321,753,500		SK Securities Co., Ltd.
September 15, 2026		Common shares		650,000		650,000		1,705,811		1,108,777,582,500		SK Securities Co., Ltd.
September 16, 2026		Common shares		650,000		650,000		1,726,691		1,122,349,587,000		SK Securities Co., Ltd.
September 17, 2026		Common shares		650,000		650,000		1,753,066		1,139,493,317,500		SK Securities Co., Ltd.
September 18, 2026		Common shares		650,000		650,000		1,833,367		1,191,688,944,000		SK Securities Co., Ltd.
September 21, 2026		Common shares		600,000		600,000		1,871,849		1,123,109,678,500		SK Securities Co., Ltd.
September 22, 2026		Common shares		600,000		600,000		1,902,595		1,141,557,135,500		SK Securities Co., Ltd.
September 23, 2026		Common shares		600,000		600,000		1,853,921		1,112,352,940,000		SK Securities Co., Ltd.
September 28, 2026		Common shares		600,000		600,000		1,786,459		1,071,875,475,000		SK Securities Co., Ltd.
September 29, 2026		Common shares		600,000		600,000		1,764,050		1,058,430,442,000		SK Securities Co., Ltd.
September 30, 2026		Common shares		600,000		600,000		1,793,428		1,076,057,000,500		SK Securities Co., Ltd.
October 1, 2026		Common shares		600,000		600,000		1,796,753		1,078,052,003,000		SK Securities Co., Ltd.
October 2, 2026		Common shares		500,000		500,000		1,841,602		920,801,402,500		SK Securities Co., Ltd.
October 6, 2026		Common shares		400,000		400,000		1,793,208		717,283,318,500		SK Securities Co., Ltd.
October 7, 2026		Common shares		400,000		400,000		1,744,972		697,988,867,000		SK Securities Co., Ltd.
October 8, 2026		Common shares		400,000		400,000		1,728,840		691,536,000,000		SK Securities Co., Ltd.
October 12, 2026		Common shares		400,000		400,000		1,626,374		650,549,947,000		SK Securities Co., Ltd.
October 13, 2026		Common shares		400,000		400,000		1,467,215		586,886,204,500		SK Securities Co., Ltd.
October 14, 2026		Common shares		450,000		450,000		1,462,109		657,949,411,500		SK Securities Co., Ltd.
October 15, 2026		Common shares		450,000		450,000		1,270,008		571,503,903,500		SK Securities Co., Ltd.
October 16, 2026		Common shares		500,000		500,000		1,292,119		646,059,939,000		SK Securities Co., Ltd.

October 19, 2026		Common shares		500,000		500,000		1,246,959		623,479,675,500		SK Securities Co., Ltd.
October 20, 2026		Common shares		500,000		500,000		1,223,103		611,551,643,500		SK Securities Co., Ltd.
October 21, 2026		Common shares		472,080		443,272		1,302,482		577,353,877,000		SK Securities Co., Ltd.
Total		—		23,722,080		23,693,272		1,688,426		40,004,339,063,500		—

(1) Based on order execution dates.

(2) Based on weighted average price.

(3) Excludes brokerage commissions.

3. Discrepancy with the Initial Report:

The actual aggregate acquisition price, which does not include brokerage commissions, was Won 40,004,339,063,500, compared to the estimated aggregate acquisition price of Won 40,004,340,000,000 as set forth in the Initial Report. The difference is less than the price of one share.

4. Treasury Shares Held after the Acquisition (as of October 26, 2026)

(Unit: in millions of Won, shares and percentages)

Type		Direct Acquisition (A)						Acquisition through Broker Pursuant to Trust Agreement (B)						Total (A + B)
		Number of Shares		Percentage of Total Shares		Value(1)		Number of Shares		Percentage of Total Shares		Value		Number of Shares		Percentage of Total Shares		Value(1)
Common Shares		25,319,041		3.47		40,101,023		—		—		—		25,319,041		3.47		40,101,023
Total		25,319,041		3.47		40,101,023		—		—		—		25,319,041		3.47		40,101,023

(1) Book value including brokerage commissions.

5. Changes in Holdings of the Largest Shareholder Before and After the Acquisition (as of October 26, 2026)

(Unit: in shares)

Name		Type of Shares		At the Date of the Initial Report		At the End of the Acquisition Period		Reason for Change
SK square Co., Ltd.		Common shares		146,100,000		146,100,000		—
Total		Common shares		146,100,000		146,100,000		—
		Total		146,100,000		146,100,000		—

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: October 26, 2026