SK hynix: SK square reports 20% ownership stake

Available on EDGAR 11/13/2026 - 06:07 AM EST Accepted by SEC EDGAR 11/13/2026 - 06:00 AM EST Learn about SEC filing dates

Rhea-AI Filing Summary

SK hynix Inc. (SKHY) had a reported 20.0% beneficial owner position held by SK square Co., Ltd., representing 146,100,000 common shares as of September 30, 2026. SK square held all the reported shares directly and had sole voting and dispositive power. The 20.0% figure is based on 728,865,500 common shares outstanding immediately after the offering, as SK hynix reported in its July 10, 2026 prospectus.

Key Figures

Common shares beneficially owned: 146,100,000 shares Ownership percentage: 20.0% Common shares outstanding: 728,865,500 shares +1 more

4 metrics

Common shares beneficially owned 146,100,000 shares Held directly by SK square Co., Ltd. as of September 30, 2026

Ownership percentage 20.0% Based on common shares outstanding immediately after the offering

Common shares outstanding 728,865,500 shares Immediately after the offering, as reported in SK hynix's July 10, 2026 prospectus

ADS representation 1/10 of a common share Each American Depositary Share represents one-tenth of a common share

Key Terms

beneficially owned, sole voting power, sole dispositive power, American Depositary Shares

4 terms

beneficially owned financial

"Amount beneficially owned: 146,100,000.00"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole Voting Power 146,100,000.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Sole Dispositive Power 146,100,000.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

American Depositary Shares technical

"American Depositary Shares (the "ADSs") of SK hynix Inc."

American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.

FAQ

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

How many SKHY shares did SK square report owning?

SK square Co., Ltd. reported beneficial ownership of 146,100,000 common shares as of September 30, 2026. It held all of those shares directly and had sole voting and dispositive power.

What percentage of SKHY did SK square report owning?

SK square Co., Ltd. reported beneficial ownership of 20.0% of SK hynix's common shares. The percentage is based on 728,865,500 common shares outstanding immediately after the offering, as reported by SK hynix in its July 10, 2026 prospectus.

What does the SKHY CUSIP represent?

The cited CUSIP applies to American Depositary Shares, each representing one-tenth of a common share. SK square's reported position consists of common shares.

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

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

SK hynix Inc.

(Name of Issuer)

Common shares, par value Won 5,000 per share

(Title of Class of Securities)

78392B206

(CUSIP Number)

09/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 78392B206

1

Names of Reporting Persons

SK square Co., Ltd.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

KOREA, REPUBLIC OF

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 146,100,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 146,100,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

146,100,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

20.0 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: This CUSIP number 78392B 206 applies to the American Depositary Shares (the "ADSs") of SK hynix Inc., each representing one-tenth of a common share, par value Won 5,000 per share ("Common Shares"). No CUSIP number has been assigned to the Common Shares.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: SK hynix Inc.
(b)	Address of issuer's principal executive offices: 2091, Gyeongchung-daero, Bubal-eup, Icheon-si, Gyeonggi-do 17336, Korea
Item 2.
(a)	Name of person filing: This Schedule 13G is being filed by SK square Co., Ltd. (the "Reporting Person")
(b)	Address or principal business office or, if none, residence: 65, Eulji-ro, Jung-gu, Seoul 04539, Korea
(c)	Citizenship: See the response to row 4 of the cover page.
(d)	Title of class of securities: Common shares, par value Won 5,000 per share
(e)	CUSIP Number(s): 78392B206
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See the response to row 9 of the cover page, the entirety of which consists of Common Shares directly held by the Reporting Person. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 728,865,500 Common Shares outstanding immediately after the offering, as reported by the Issuer in its prospectus filed with the U.S. Securities and Exchange Commission on July 10, 2026 pursuant to Rule 424(b)(4) of the U.S. Securities Act of 1933, as amended.
(b)	Percent of class: 20.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See the response to row 5 of the cover page.
	(ii) Shared power to vote or to direct the vote: See the response to row 6 of the cover page.
	(iii) Sole power to dispose or to direct the disposition of: See the response to row 7 of the cover page.
	(iv) Shared power to dispose or to direct the disposition of: See the response to row 8 of the cover page.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

SK square Co., Ltd.

Signature:	/s/ Joongsuk Oh
Name/Title:	Joongsuk Oh/Vice President
Date:	11/13/2026