BlackRock (OC) holds 8,069,391 shares — 10.0% stake in Owens Corning

Rhea-AI Filing Summary

BlackRock, Inc. filed Amendment No. 13 to a Schedule 13G/A reporting beneficial ownership of $8,069,391 shares of Owens Corning common stock, equal to 10.0% of the class. The filing lists sole voting power of $7,816,343 shares and sole dispositive power of $8,069,391. The cover shows CUSIP 690742101 and an issuer address for Owens Corning. The signature block is dated 06/04/2026.

Insights

Institutional Ownership Analyst

BlackRock reports a 10.0% position in Owens Corning totaling 8,069,391 shares.

BlackRock's amended Schedule 13G/A quantifies beneficial ownership as 8,069,391 shares representing 10.0% of the class. The filing also discloses sole voting power of 7,816,343 shares, indicating voting control over most of the reported stake.

Cash‑flow treatment and any plans to buy or sell are not stated; subsequent filings would show changes in position. Ownership details are dated in the signature block (06/04/2026).

Key Figures

Beneficially owned: 8,069,391 shares Percent of class: 10.0% Sole voting power: 7,816,343 shares +2 more

5 metrics

Beneficially owned 8,069,391 shares Amount beneficially owned reported in Item 4

Percent of class 10.0% Percent of common stock reported in Item 4

Sole voting power 7,816,343 shares Item 4(i) sole power to vote

Sole dispositive power 8,069,391 shares Item 4(iii) sole power to dispose

CUSIP 690742101 Identifier for Owens Corning common stock

Key Terms

Schedule 13G/A, Beneficially owned, Sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 13 to a Schedule 13G/A reporting beneficial ownership"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficially owned regulatory

"Amount beneficially owned: 8069391 (b) Percent of class: 10.0 %"

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 dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 8069391"

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.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 13)

OWENS CORNING

(Name of Issuer)

Common Stock

(Title of Class of Securities)

690742101

(CUSIP Number)

05/31/2026

(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): 690742101

1

Names of Reporting Persons

BlackRock, Inc.

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 7,816,343.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 8,069,391.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,069,391.00

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)

10.0 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: OWENS CORNING
(b)	Address of issuer's principal executive offices: One Owens Corning Parkway Toledo OH 43659
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 690742101
Item 4.	Ownership
(a)	Amount beneficially owned: 8069391
(b)	Percent of class: 10.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 7816343
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 8069391
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of OWENS CORNING. No one person's interest in the common stock of OWENS CORNING is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	06/04/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

What stake does BlackRock report in Owens Corning (OC)?

BlackRock reports beneficial ownership of 8,069,391 shares, equal to 10.0% of Owens Corning's common stock. The filing is an Amendment No. 13 to a Schedule 13G/A and includes voting and dispositive power figures.

How many votes does BlackRock control in the filing?

The filing shows BlackRock has sole voting power over 7,816,343 shares. Shared voting power is reported as 0, per the Ownership section in the Schedule 13G/A.

What is the CUSIP and why is it listed?

The CUSIP listed is 690742101, which identifies Owens Corning common stock for reporting purposes. CUSIPs are used to precisely specify the class of securities in SEC ownership filings.

When was the Schedule 13G/A signed for this amendment?

The signature block on the amendment is dated 06/04/2026, signed by Spencer Fleming, Managing Director, on behalf of BlackRock, Inc., per the exhibit and signature section.

Does the filing disclose trading intentions or cash proceeds?

No. The amendment reports beneficial ownership counts and powers but does not state trading intentions or cash‑flow treatment. Any future purchases or sales would appear in later filings.