File: Attachment GRB - October 20, 2026 - GRB Announces Private Placement Upsize.pdf

Greenbriar Sustainable Living Inc. Greenbriar Capital Holdco Inc. Greenbriar Capital (US) LLC

632 Foster Avenue, Coquitlam, British Columbia, Canada V3J 2L7 Phone: 949.903.5906 Fax: 604.608.9572 www.greenbriarliving.com

NEWS RELEASE

Greenbriar Announces Upsizing of Proposed Non-Brokered Private Placement

October 20th, 2026 Trading Symbol: TSX Venture Exchange: GRB

US OTC Market: GEBRF

Scottsdale, Arizona, October 20th, 2026 - Greenbriar Sustainable Living Inc. (TSXV: GRB) (OTC: GEBRF) ("Greenbriar" or the "Company") announces that further to its news release dated October 6, 2026, it has increased the size of its previously announced non-brokered private placement of units (the "Private Placement") from 2,200,000 units to 2,700,000 units at a price of CDN $0.45 per unit, for aggregate gross proceeds of up to CDN $1,215,000, an increase from CDN $990,000. Each unit consists of one common share and one common share purchase warrant. Each warrant is exercisable to acquire one additional common share at CDN $0.55 per share for a period of 36 months. The Company intends to use the proceeds primarily for Sage Ranch engineering costs to file final construction permits for grading, sewer, drainage, water, curb, gutter, internal roads and dry utilities.

All securities issued pursuant to the Private Placement will be subject to a statutory hold period of four months and one day from the date of issuance. The Private Placement remains subject to the approval of the TSX Venture Exchange. No finder's fees will be paid in connection with the Private Placement.

The Company also announces that it has granted an aggregate of 450,000 incentive stock options (the "Options") to certain officers of the Company pursuant to its stock option plan. Each Option is exercisable to acquire one common share of the Company at a price of CDN $0.55 per share for a period of five years from the date of grant.

About Greenbriar Sustainable Living Inc.

Greenbriar is a leading developer of sustainable real estate and renewable energy. With long-term, high impact projects and led by a successful industry-recognized operating and development team, Greenbriar targets deep valued assets directed at accretive shareholder value.

ON BEHALF OF THE BOARD OF DIRECTORS

"Jeff Ciachurski"

Jeffrey J. Ciachurski Chief Executive Officer and Director Phone: 949.903.5906

"Greenbriar Capital Corp. was recognized as a TSX Venture 50trademark company in 2014 and 2023. TSX Venture 50 is a trade-mark of TSX Inc. and is used under license."

Toronto Venture Exchange Symbol: GRB US OTC Symbol: GEBRF

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Neither the TSX Venture Exchange nor its Regulation Service Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

This news release contains forward-looking information and forward-looking statements within the meaning of applicable Canadian and United States securities laws (collectively, "forward-looking statements"). Forward- looking statements relate to future events or future performance and include, without limitation, statements regarding the completion of the Private Placement, the issuance of Common Shares and Warrants, and approval of the Private Placement by the TSX Venture Exchange. Forward-looking statements are often identified by words such as "anticipate", "believe", "plan", "estimate", "expect", "potential", "target", "budget", "propose" and "intend", and similar expressions, including statements that events or results "may", "will", "should", "could" or "might" occur.

Forward-looking statements are based on assumptions and expectations regarding future events and involve known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those expressed or implied by such statements. These factors include, among other things, general economic and market conditions, regulatory approvals and the Company's ability to complete the Private Placement as proposed. There can be no assurance that forward-looking statements will prove to be accurate and actual results and future events may differ materially from those anticipated in such statements.

Readers are cautioned not to place undue reliance on forward-looking statements. Additional information regarding risks and uncertainties is described under the heading "Risks and Uncertainties" in the Company's most recently filed MD&A available on SEDAR+ at www.sedarplus.ca. The Company does not undertake any obligation to update or revise any forward-looking statements except as required by applicable law.

"Greenbriar Capital Corp. was recognized as a TSX Venture 50trademark company in 2014 and 2023. TSX Venture 50 is a trade-mark of TSX Inc. and is used under license."

Toronto Venture Exchange Symbol: GRB US OTC Symbol: GEBRF

LEGAL_44345480.3

File: '\\swfile\EmailIn\20261020 103646 Attachment GRB - October 20, 2026 - GRB Announces Private Placement Upsize.docx'

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"Greenbriar Capital Corp. was recognized as a TSX Venture 50(TM) company in 2014 and 2023.

TSX Venture 50 is a trade-mark of TSX Inc. and is used under license."

Toronto Venture Exchange Symbol: GRB | US OTC Symbol: GEBRF

LEGAL_44345480.3

Greenbriar Sustainable Living Inc.

Greenbriar Capital Holdco Inc.

Greenbriar Capital (US) LLC

632 Foster Avenue, Coquitlam, British Columbia, Canada V3J 2L7

Phone: 949.903.5906 Fax: 604.608.9572

www.greenbriarliving.com

"Greenbriar Capital Corp. was recognized as a TSX Venture 50(TM) company in 2014 and 2023.

TSX Venture 50 is a trade-mark of TSX Inc. and is used under license."

Toronto Venture Exchange Symbol: GRB | US OTC Symbol: GEBRF

LEGAL_44345480.3

NEWS RELEASE

Greenbriar Announces Upsizing of Proposed Non-Brokered Private Placement

October 20th, 2026 Trading Symbol:

TSX Venture Exchange: GRB

US OTC Market: GEBRF

Scottsdale, Arizona, October 20th, 2026 - Greenbriar Sustainable Living Inc. (TSXV: GRB) (OTC: GEBRF) ("Greenbriar" or the "Company") announces that further to its news release dated October 6, 2026, it has increased the size of its previously announced non-brokered private placement of units (the "Private Placement") from 2,200,000 units to 2,700,000 units at a price of CDN $0.45 per unit, for aggregate gross proceeds of up to CDN $1,215,000, an increase from CDN $990,000. Each unit consists of one common share and one common share purchase warrant. Each warrant is exercisable to acquire one additional common share at CDN $0.55 per share for a period of 36 months. The Company intends to use the proceeds primarily for Sage Ranch engineering costs to file final construction permits for grading, sewer, drainage, water, curb, gutter, internal roads and dry utilities.

All securities issued pursuant to the Private Placement will be subject to a statutory hold period of four months and one day from the date of issuance. The Private Placement remains subject to the approval of the TSX Venture Exchange. No finder's fees will be paid in connection with the Private Placement.

The Company also announces that it has granted an aggregate of 450,000 incentive stock options (the "Options") to certain officers of the Company pursuant to its stock option plan. Each Option is exercisable to acquire one common share of the Company at a price of CDN $0.55 per share for a period of five years from the date of grant.

About Greenbriar Sustainable Living Inc.

Greenbriar is a leading developer of sustainable real estate and renewable energy. With long-term, high impact projects and led by a successful industry-recognized operating and development team, Greenbriar targets deep valued assets directed at accretive shareholder value.

ON BEHALF OF THE BOARD OF DIRECTORS

"Jeff Ciachurski"

Jeffrey J. Ciachurski

Chief Executive Officer and Director

Phone: 949.903.5906

Neither the TSX Venture Exchange nor its Regulation Service Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

This news release contains forward-looking information and forward-looking statements within the meaning of applicable Canadian and United States securities laws (collectively, "forward-looking statements"). Forward-looking statements relate to future events or future performance and include, without limitation, statements regarding the completion of the Private Placement, the issuance of Common Shares and Warrants, and approval of the Private Placement by the TSX Venture Exchange. Forward-looking statements are often identified by words such as "anticipate", "believe", "plan", "estimate", "expect", "potential", "target", "budget", "propose" and "intend", and similar expressions, including statements that events or results "may", "will", "should", "could" or "might" occur.

Forward-looking statements are based on assumptions and expectations regarding future events and involve known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those expressed or implied by such statements. These factors include, among other things, general economic and market conditions, regulatory approvals and the Company's ability to complete the Private Placement as proposed. There can be no assurance that forward-looking statements will prove to be accurate and actual results and future events may differ materially from those anticipated in such statements.

Readers are cautioned not to place undue reliance on forward-looking statements. Additional information regarding risks and uncertainties is described under the heading "Risks and Uncertainties" in the Company's most recently filed MD&A available on SEDAR+ at www.sedarplus.ca. The Company does not undertake any obligation to update or revise any forward-looking statements except as required by applicable law.