Mr. Martin Dumont reports

GOLDMINING FILES PEA TECHNICAL REPORT FOR ITS LA MINA PROJECT, COLOMBIA - HIGHLIGHTING $1.0 BILLION AFTER-TAX NPV AND 32 per cent IRR

Goldmining Inc. has filed a technical report, which includes the previously announced updated preliminary economic assessment (the 2026 PEA) on its La Mina project, located in Antioquia, Colombia.

The technical report, titled "NI 43-101 Technical Report and Preliminary Economic Assessment for the La Mina Gold-Copper Mineral Deposit, Antioquia, Republic of Colombia" and with an effective date of April 22, 2026, is available under the company's respective profiles at SEDAR+ and the Securities and Exchange Commission. All currency amounts herein are in United States dollars unless otherwise indicated.

2026 PEA highlights:

• Strong base case economics: After-tax NPV 5 (net present value, 5-per-cent discount rate) of $1.0-billion and an after-tax internal rate of return (IRR) of 32.2 per cent and initial payback of approximately 2.7 years.
• Leverage to spot prices: At current spot prices (approximately $4,775/ounce Au (gold), $5.75/pound Cu (copper) and $77/oz Ag (silver)), the after-tax NPV 5 increases to approximately $1.8-billion with an IRR of 49.1 per cent and initial payback of 1.9 years. Spot prices were selected on April 20, 2026, as 30-day averages.
• High capital efficiency: Initial capital expenditures are estimated at $523-million, representing an attractive 1.9 times base case NPV 5 to initial capital ratio that highlights the project's potential for a compelling return on investment.
• Strong production profile: Average annual production of 152,400 ounces Au equivalent (AuEq) over the first five years of operation, and total life of mine (LOM) production of 1.5 Moz AuEq (comprising 1.2 Moz Au, 2.6 Moz Ag and 195 Mlb (million pounds) Cu) over an 11.2-year projected mine life.
• Resilient cost profile: Estimated total cash cost of $872/oz Au and all-in sustaining cost (AISC) of $1,045/oz Au (calculated on a byproduct basis).
• Conventional operation: The PEA contemplates a conventional open pit, truck and shovel operation to support a processing rate of 15,000 tonnes per day (tpd). A proven processing flowsheet utilizing standard froth flotation and leach circuits will achieve metallurgical recoveries of 91 per cent Au, 80 per cent Cu and 64 per cent Ag.

Alastair Still, chief executive officer of Goldmining, commented: "The completion of the updated La Mina PEA marked a significant milestone for Goldmining as we actively advance our Americas portfolio. The study demonstrates a compelling base case and the project's exceptional leverage to the current metal price environment. With a strong $1.0-billion base case NPV, La Mina reflects our strategy of demonstrating deep intrinsic value that can be further enhanced through targeted exploration and derisking. We continue to work to unlock value from key assets within our portfolio with active exploration and development."

The PEA is preliminary in nature, and there is no certainty that the reported results will be realized. The PEA includes inferred mineral resources, which are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves. There is no certainty that this PEA, including the conceptual economics set out therein, will be realized.

Qualified person

Imola Gotz, MSc, PEng, FEC, vice-president, project development, of the company and a qualified person, as such term is defined in National Instrument 43-101, has supervised the preparation of this news release and has reviewed and approved the scientific and technical information contained herein.

About Goldmining Inc.

Goldmining is a public mineral exploration company focused on acquiring and developing gold assets in the Americas. Through its disciplined acquisition strategy, Goldmining now controls a diversified portfolio of resource-stage gold and gold-copper projects in Canada, the United States, Brazil, Colombia and Peru.

We seek Safe Harbor.