The Toronto Stock Exchange reports that Rio2 Ltd. subscription receipts will be listed at 5:01 p.m. on Dec. 12, 2025, for trading at the open on Dec. 15, 2025. As stated in the prospectus supplement dated Dec. 10, 2025, to the short form base shelf prospectus dated Oct. 16, 2024, as amended pursuant to amendment No. 1 to the short form base shelf prospectus dated Dec. 3, 2025, the company is issuing 86,094,750 subscription receipts at $2.22 per subscription receipt in a public offering that is expected to close before the open on Dec. 15, 2025. The subscription receipts will trade under the symbol RIO.R, in Canadian dollars and with Cusip No. 767217 12 8. The transfer agent and registrar is Computershare Trust Company of Canada at its principal office in Toronto, and the designated market-maker is Citadel Securities Canada ULC.

According to the TSX, each subscription receipt entitles the holder to receive, upon the closing of the related acquisition, without payment of any additional consideration and without any further action on the part of the holder thereof, one common share (symbol RIO). If: (i) the acquisition closing does not occur on or before 5 p.m. Eastern Time on March 31, 2026; (ii) the escrow release notice has not been delivered to the subscription receipt agent on or before the deadline; (iii) the acquisition agreement is terminated on or before the deadline; or (iv) the company advises the subscription receipt agent and the underwriters, on behalf of the underwriters, or announces to the public that it does not intend to proceed with the acquisition, the subscription receipt agent will return to holders of subscription receipts from the escrowed funds, an amount per subscription receipt equal to the offering price plus a pro rata share of any earned interest, calculated from the closing date to, but excluding, the termination time.

The TSX reports that the subscription receipts will be listed and posted for trading until the earlier of the completion of the acquisition or a termination event. The TSX will issue a further bulletin to confirm either: (i) the completion of the acquisition; and/or (ii) the delisting of the subscription receipts.