Mr. Jason Nguyen reports

EARLY WARNING NEWS RELEASE OF JASON T. NGUYEN

Jason T. Nguyen has filed an early warning report regarding his updated securityholdings of securities of Vext Science Inc.

On Dec. 24, 2025, Mr. Nguyen entered into two share purchase agreements, pursuant to which Mr. Nguyen agreed to sell an aggregate of 20,340 Class A common shares in the capital of the company and the issuer agreed to convert such multiple voting shares to common shares in the capital of the issuer in accordance with the issuer's articles. Each multiple voting share is convertible into 100 subordinate voting shares in accordance with the issuer's articles. The 20,340 multiple voting shares represent 3.0 per cent of the issued and outstanding multiple voting shares and 1.1 per cent of the issued and outstanding subordinate voting shares (after conversion of the multiple voting shares). The transaction was completed effective Dec. 31, 2025.

Immediately prior to the transaction, Mr. Nguyen beneficially owned or otherwise exercised control or direction over 493,261 multiple voting shares, 1,425,300 subordinate voting shares and 100,000 options to purchase subordinate voting shares, representing approximately 73.3 per cent of the issued and outstanding multiple voting shares and approximately 20.52 per cent of the issued and outstanding subordinate voting shares (on an a partially diluted basis, assuming conversion of all multiple voting shares).

As a result of the transaction (including the conversion of the 20,340 multiple voting shares), Mr. Nguyen beneficially owns or otherwise exercises control or direction over 473,291 multiple voting shares, 1,425,300 subordinate voting shares and 100,000 options, representing approximately 72.5 per cent of the issued and outstanding multiple voting shares and approximately 19.7 per cent of the issued and outstanding subordinate voting shares (on an a partially diluted basis, assuming conversion of all multiple voting shares).

Mr. Nguyen received aggregate proceeds of $305,100 (U.S.) for the transaction, which was paid to the company as partial repayment of the promissory note issued by Mr. Nguyen in favour of the company. Mr. Nguyen has no present intention to dispose of or acquire further securities of the company, other than pursuant to long-term incentive plans adopted by the company. Mr. Nguyen may, in the future, participate in financings and/or acquire or dispose of securities of the company in the market, privately or otherwise, as circumstances or market conditions warrant.

This press release is issued pursuant to early warning requirements of National Instrument 62-104 (Take-over Bids and Issuer Bids) and National Instrument 62-103 (the Early Warning System and Related Take-over Bid and Insider Reporting Issues), which also require a report to be filed with regulatory authorities in each of the jurisdictions containing additional information with respect to the foregoing matters. A copy of the early warning report to which this news release relates can be obtained on the SEDAR+ profile of the issuer or by contacting Jonathan Ross, Vext investor relations, at 416-244-9851 or jon.ross@loderockadvisors.com.