South Bow to Sell 91,891 South Bow Shares (SOBO) in Form 144

Rhea-AI Filing Summary

South Bow common shares were reported in a Form 144 notice showing proposed sales tied to stock option exercises by South Bow Corporation of 41,050 and 50,841 shares, each dated 03/09/2026, with prices listed at $45.50 and $45.25 and CUSIP 208250512. The filing also records a past 3-month sale by Richard Prior of 365 common shares on 12/17/2025 for $10,037.50.

Insights

Securities Compliance Analyst

Form 144 lists proposed stock option-related sales by an affiliate entity and a recent small open-market sale.

The filing shows two planned stock option exercise sales by South Bow Corporation totaling 91,891 common shares dated 03/09/2026, with per-share prices of $45.50 and $45.25 and CUSIP 208250512. This is a notification under Rule 144, not a registration.

Documented prior activity includes a sale of 365 shares by Richard Prior on 12/17/2025 for $10,037.50. Cash‑flow treatment and settlement mechanics are not specified in the excerpt; subsequent transaction notices or broker records would provide execution details.

FAQ

What does SOBO's Form 144 disclose about planned share sales?

The Form 144 discloses proposed sales connected to stock option exercises by South Bow Corporation of 41,050 and 50,841 common shares dated 03/09/2026. The filing lists per‑share prices of $45.50 and $45.25 and CUSIP 208250512.

Who is listed as the selling party and how many shares are involved?

The filing lists South Bow Corporation as the selling party for two entries totaling 41,050 and 50,841 shares dated 03/09/2026. The entries are labeled as stock option exercises in the provided excerpt.

Does the Form 144 show any recent insider sales for SOBO?

Yes; the excerpt records a past 3‑month sale by Richard Prior of 365 common shares on 12/17/2025 for $10,037.50. That transaction is listed separately from the March 2026 proposed sales.

Are proceeds or settlement details provided in this Form 144 excerpt?

The excerpt lists per‑share prices for the March 2026 entries and the dollar amount for the December 2025 sale but does not specify who receives proceeds or settlement mechanics. Further documents would be needed for cash‑flow details.

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

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Accepted by SEC EDGAR 03/09/2026 - 03:57 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002046292
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	South Bow Corporation
SEC File Number	001-42021
Address of Issuer	707 5th Street SW Suite 900 CALGARY ALBERTA, CANADA T2P 1V8
Phone	587-318-5410
Name of Person for Whose Account the Securities are To Be Sold	Richard Prior
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Senior Vice President & COO

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Shares	Canaccord Genuity Corp. Centennial Place - East Tower 520 3rd Ave SW, Suite 2400 Calgary A0 T2P 0R3	41050	45.50	208250512	03/09/2026	TSX
Common Shares	Canaccord Genuity Corp. Centennial Place - East Tower 520 3rd Ave SW, Suite 2400 Calgary A0 T2P 0R3	50841	45.25	208250512	03/09/2026	TSX

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Shares	03/09/2026	Stock Option Exercise	South Bow Corporation			41050	03/09/2026	Compensation
Common Shares	03/09/2026	Stock Option Exercise	South Bow Corporation			50841	03/09/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Richard Prior 12414 Mossycup Drive Houston TX 77024	Common Shares	12/17/2025	365	10037.50

144: Remarks and Signature

Remarks	Enter an explanation below if there is an exception regarding proprietary interests.
Date of Notice	03/09/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Richard Prior
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)