Capital World Investors reports 5.7% Knife River (KNF) stake on Schedule 13G

Rhea-AI Filing Summary

Capital World Investors reported beneficial ownership of 3,244,201 shares of Knife River Corporation common stock on a Schedule 13G. This represents 5.7% of the 56,753,855 Knife River shares believed to be outstanding as of June 30, 2026.

Capital World Investors, a division of Capital Research and Management Company and its investment management affiliates, has sole voting and dispositive power over all 3,244,201 shares, with no shared voting or dispositive authority. The filing notes that another person, including SMALLCAP World Fund, Inc., may have rights to receive dividends or proceeds from these securities.

Key Figures

Shares beneficially owned: 3,244,201 shares Ownership percentage: 5.7% Shares outstanding: 56,753,855 shares +4 more

7 metrics

Shares beneficially owned 3,244,201 shares Knife River common stock beneficially owned by Capital World Investors

Ownership percentage 5.7% Percentage of Knife River common stock class owned by Capital World Investors

Shares outstanding 56,753,855 shares Knife River shares believed to be outstanding used to calculate ownership percentage

Sole voting power 3,244,201 shares Shares over which Capital World Investors has sole power to vote

Sole dispositive power 3,244,201 shares Shares over which Capital World Investors has sole power to dispose

Filing signature date 08/11/2026 Date the Schedule 13G was signed by Timothy J. Moon

Reported as of date 06/30/2026 Date associated with the reported Knife River share figures

Key Terms

Schedule 13G, beneficial owner, sole voting power, sole dispositive power, +1 more

5 terms

Schedule 13G regulatory

"Capital World Investors reported beneficial ownership on a Schedule 13G."

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficial owner financial

"CWI is deemed to be the beneficial owner of 3,244,201 shares or 5.7%."

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

sole voting power financial

"Sole power to vote or to direct the vote: 3,244,201."

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 power to dispose or to direct the disposition of: 3,244,201."

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.

Investment Company Act of 1940 regulatory

"A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 is not required."

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

FAQ

What percentage of Knife River Corporation (KNF) does Capital World Investors own?

Capital World Investors reported beneficial ownership of 5.7% of Knife River Corporation’s common stock, representing 3,244,201 shares out of 56,753,855 shares believed to be outstanding as of June 30, 2026.

How many Knife River (KNF) shares does Capital World Investors control voting for?

Capital World Investors has sole voting power over 3,244,201 Knife River shares and no shared voting power. It also has sole dispositive power over the same number of shares, indicating exclusive authority to vote and dispose them.

What type of SEC filing did Capital World Investors submit for Knife River (KNF)?

Capital World Investors submitted a Schedule 13G regarding Knife River common stock. A Schedule 13G is a beneficial ownership report used by certain large shareholders that are not seeking to change or influence control of the issuer.

Who is the reporting person in the Knife River (KNF) Schedule 13G?

The reporting person is Capital World Investors, a division of Capital Research and Management Company and its investment management affiliates. The filing was signed by Timothy J. Moon, Vice President and Senior Counsel of Capital Research and Management Company.

Does any other party have rights to Knife River (KNF) shares held by Capital World Investors?

Yes. The filing states that another person may have the right to receive dividends or sale proceeds from these securities, and specifically references SMALLCAP World Fund, Inc. in connection with such potential rights.

Where is Capital World Investors based according to the Knife River (KNF) filing?

Capital World Investors lists its principal business office as 333 South Hope Street, 55th Floor, Los Angeles, California 90071. Knife River’s principal executive offices are in Bismarck, North Dakota.

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Available on EDGAR 08/12/2026 - 05:41 PM Accepted by SEC EDGAR 08/12/2026 - 05:40 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Knife River Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

498894104

(CUSIP Number)

06/30/2026

(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): 498894104

1

Names of Reporting Persons

Capital World Investors

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 3,244,201.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,244,201.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,244,201.00

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)

5.7 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Knife River Corporation
(b)	Address of issuer's principal executive offices: 1150 West Century Avenue, P.O. Box 5568, Bismarck, ND 58506-5568
Item 2.
(a)	Name of person filing: Capital World Investors
(b)	Address or principal business office or, if none, residence: 333 SOUTH HOPE STREET, 55TH FLOOR, LOS ANGELES, CALIFORNIA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 498894104
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: 3,244,201 ** **Capital World Investors ("CWI") is a division of Capital Research and Management Company ("CRMC"), as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., Capital Group Private Client Services, Inc., and Capital Group Investment Management Private Limited (together with CRMC, the "investment management entities"). CWI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital World Investors." CWI is deemed to be the beneficial owner of 3,244,201 shares or 5.7% of the 56,753,855 shares believed to be outstanding.
(b)	Percent of class: 5.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3,244,201
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 3,244,201
	(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. SMALLCAP World Fund, Inc.
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:

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.

Capital World Investors

Signature:	Timothy J. Moon
Name/Title:	Vice President and Senior Counsel, Capital Research and Management Company
Date:	08/11/2026