Capital International Investors reports 4.62M SOBO stake (SOBO)

Rhea-AI Filing Summary

Capital International Investors reports beneficial ownership of 4,622,141 shares of South Bow Corporation. The filing states this equals 2.2% of the 208,250,512 shares believed outstanding as of 03/31/2026. The Schedule 13G/A attributes sole voting power for 4,580,591 shares and sole dispositive power for 4,622,141 shares. The amendment is signed May 13, 2026, and is presented under the form's routine ownership disclosures.

Insights

Institutional Ownership Analyst

Large asset manager holds a modest 2.2% stake in South Bow.

Capital International Investors is recorded as beneficial owner of 4,622,141 shares, with sole dispositive power over that amount. The filing is an amended Schedule 13G/A updating ownership disclosures for the period ending 03/31/2026.

As a passive investor filing under Schedule 13G/A, this ownership is a disclosure of position rather than an active corporate action; subsequent filings would show material changes.

Proxy & Governance Specialist

Stake size (2.2%) is below 5% reporting threshold for control concerns.

The filing lists voting and dispositive powers: 4,580,591 sole voting and 4,622,141 sole dispositive. This level typically does not trigger governance control implications but is reportable under SEC beneficial ownership rules.

Future disclosures would be required if ownership crosses statutory thresholds or the firm changes its intent toward active influence.

Key Figures

Beneficial ownership: 4,622,141 shares Percent of class: 2.2% Shares outstanding: 208,250,512 shares +2 more

5 metrics

Beneficial ownership 4,622,141 shares reported on Schedule 13G/A; as of 03/31/2026

Percent of class 2.2% of 208,250,512 shares believed outstanding

Shares outstanding 208,250,512 shares believed to be outstanding (used to calculate percent)

Sole voting power 4,580,591 shares shares with sole power to vote

Sole dispositive power 4,622,141 shares shares with sole power to dispose

Key Terms

Schedule 13G/A, Beneficial owner, Dispositive power, Sole voting power

4 terms

Schedule 13G/A regulatory

"Amendment No. 3; Schedule 13G/A reporting passive 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.

Beneficial owner regulatory

"CII is deemed to be the beneficial owner of 4,622,141 shares"

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.

Dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 4,622,141"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Sole voting power regulatory

"Sole power to vote or to direct the vote: 4,580,591"

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.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 05/14/2026 - 12:52 PM Learn about SEC filing dates

FAQ

What stake does Capital International Investors report in SOBO?

The firm reports ownership of 4,622,141 shares, representing 2.2% of South Bow's common stock. The filing lists 4,580,591 shares with sole voting power and 4,622,141 with sole dispositive power.

What does Schedule 13G/A mean for SOBO (SOBO)?

Schedule 13G/A is a passive investor disclosure showing beneficial ownership. It records a passive position of 2.2% and does not by itself indicate an intent to control or influence corporate governance.

As of which date are the ownership figures reported?

The filing references the reporting period ending 03/31/2026 and is signed on 05/13/2026. The ownership count of 4,622,141 shares is stated in that amended Schedule 13G/A.

How many South Bow shares are outstanding per the filing?

The Schedule 13G/A states there are 208,250,512 shares believed to be outstanding, which is the denominator used to calculate the 2.2% ownership percentage disclosed by the reporting person.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

South Bow Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

83671M105

(CUSIP Number)

03/31/2026

(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): 83671M105

1

Names of Reporting Persons

Capital International 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 4,580,591.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,622,141.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,622,141.00

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)

2.2 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: South Bow Corporation
(b)	Address of issuer's principal executive offices: 707 5 Street SW, Suite 900, Calgary, AB T2P 1V8, Canada
Item 2.
(a)	Name of person filing: Capital International Investors
(b)	Address or principal business office or, if none, residence: 333 South Hope Street, 55th Fl, Los Angeles, CA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 83671M105
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: 4,622,141 ** **Capital International Investors ("CII") 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"). CII's divisions of each of the investment management entities collectively provide investment management services under the name "Capital International Investors." CII is deemed to be the beneficial owner of 4,622,141 shares or 2.2% of the 208,250,512 shares believed to be outstanding.
(b)	Percent of class: 2.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 4,580,591
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4,622,141
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
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:

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 International Investors

Signature:	Aaron Espin
Name/Title:	Senior Vice President
Date:	05/13/2026