HPQ SILICON INC. — Proxy Solicitation & Information Statement 2026

May 20, 2026

HPQ SILICON INC.

NOTICE OF AN ANNUAL GENERAL MEETING OF SHAREHOLDERS

NOTICE IS HEREBY GIVEN that an Annual General Meeting of Shareholders of HPQ SILICON INC. (the "Corporation") will be held at the Centre Mont-Royal, Mansfield #2 Room, 2200 Mansfield Street, Montreal, Quebec H3A 3R8, on June 25, 2026, at 10:00 a.m. (Montreal time) for the following purposes:

1. to receive the financial statements of the Corporation for the year ended December 31, 2025, and the report of the auditors thereon, accompanied by the directors' report;
2. to elect the directors for the ensuing year;
3. to appoint Forvis Mazars, Chartered Accountants, as the Corporation's auditors for the next financial year and authorize the directors to fix their remuneration;
4. to transact such other business as may be properly brought before the Meeting or any adjournment thereof.

Particulars of the business to be transacted at the Meeting are described in further detail in the Management Information Circular of the Corporation under the section entitled PARTICULARS OF MATTERS TO BE ACTED ON.

Shareholders may exercise their rights either by attending the Meeting in person or by executing a form of proxy. If you are unable to attend the Meeting in person, you are asked to exercise your right to vote by completing, signing and returning as soon as possible, the accompanying form of proxy in the enclosed return envelope. Proxies must be deposited with Computershare Investor Services Inc., 320 Bay Street, 14th Floor, Toronto, Ontario M5H 4A6 not later than 5:00 pm, Eastern Time, on June 22, 2026, or any adjournment thereof or with the Chairman of the Meeting on the day of the Meeting or any adjournment thereof. Your proxy will not be used if you attend the Meeting in person. You may also vote by telephone or internet.

The directors of the Corporation have fixed the close of business on May 15, 2026, as the record date for determination of the shareholders of the Corporation entitled to vote, except as otherwise prescribed in the proxy solicitation circular, at the Meeting.

NOTICE-AND-ACCESS

Notice is also hereby given that the Corporation has elected to use the notice-and-access method of delivery of meeting materials for the Meeting for beneficial owners of common shares of the Corporation (the Non-Registered Holders) and for registered shareholders. The notice-and-access method of delivery allows the Corporation to deliver the proxy-related materials over internet in accordance with the notice-and-access rules adopted by the Autorité des marchés under National Instrument 54-101 Respecting communication with beneficial owners of securities of a reporting issuer. Under the notice-and-access process, registered shareholders will receive a form of proxy and the non-registered holders will receive a voting form entitling them to vote at the Meeting. The shareholders will not receive a paper copy of the management information circular, the annual financial statements of the Corporation for the financial year ended December 31, 2025, and related management's discussion and analysis and other Meeting Materials, but they will receive a notice containing information on how to have access to such Materials electronically. The use of this alternative means of delivery is more environmentally friendly as it will help reduce paper use and will also reduce the cost of printing and mailing the Meeting Materials to shareholders. Shareholders are reminded to view the Meeting Materials prior to voting. The Corporation will not be adopting stratification procedures in relation to the use of notice-and-access provisions.

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Posting of Meeting-Related Materials on Websites

Meeting Materials can be viewed online under the Corporation's profile at www.sedarplus.ca or on the Corporation's website of Computershare Trust Company of Canada, the Corporation's transfer agent and registrar, at https://envisionreports.com/HPQ2026. The Meeting Materials will remain posted on the Computershare website at least during a period of one year.

To Obtain Paper Copies of the Meeting-Related Materials

Shareholders may request paper copies of the Meeting-Related Materials be sent to them by postal delivery at no cost to them. Requests may be made up to one year from the date the Meeting-Related Materials are posted on the Computershare Website. In order to receive such paper copy or if you have any questions with respect to the Notice-and-Access before the Meeting, please contact the Corporation's transfer agent and registrar, Computershare Trust Company of Canada, by calling toll free at 1-800-564-6253. Requests should be received not later than Monday, June 15, 2026, in order to receive the Meeting-Related Materials in advance of the Meeting. After the Meeting, please contact at 1-514-846-3271 or at agm@hpqsilicon.com.

The management information circular provides additional detailed information relating to the matters to be dealt with at the Meeting and is supplemental to, and expressly made a part of, this notice of annual general meeting. Additional information about the Corporation and its financial statements are also available on the Corporation's profile at www.sedarplus.ca.

SHAREHOLDERS ARE REMINDED TO REVIEW THE CIRCULAR BEFORE VOTING.

Montreal (Quebec) May 15, 2026

BY ORDER OF THE BOARD OF DIRECTORS

(s) Bernard Tourillon
Bernard Tourillon, President and CEO