DEEP SEA MINERALS, WESTWIN SIGN NON-BINDING LETTER OF INTENT TO EVALUATE U.S. PROCESSING OF POLYMETALLIC NODULES

Deep Sea Minerals Corp. (CSE: SEAS) (OTCQB: DSEAF) (FSE: X450) (“Deep Sea Minerals” or the “Company”), a subsea mineral exploration and development company focused on advancing critical mineral opportunities from the deep ocean, is pleased to announce that it has entered into a non-binding and non-exclusive letter of intent (the “LOI”) with Westwin Elements, Inc. (“Westwin”) regarding a proposed joint development agreement to evaluate potential U.S.-based processing routes for polymetallic nodules. asserted

The LOI establishes a framework for the parties to negotiate a definitive joint development agreement in the future, following, among other things, the Company obtaining subsea mineral rights and all licenses, permits and other regulatory approvals required to explore, recover, test mine and harvest subsea polymetallic nodules. asserted

Such a joint development agreement would establish a formal framework for the Company and Westwin to jointly evaluate processing and recovery pathways for nickel, cobalt, copper, and manganese contained in polymetallic nodules. asserted

Any future joint development, feedstock supply, offtake or commercial processing arrangement would remain subject to further negotiation, applicable conditions and the execution of definitive agreements. asserted

There can be no assurance that the Company ever obtains subsea mineral rights or enters into any joint development or other definitive agreement with Westwin. asserted

The LOI, or any future joint development or other definitive agreement with Westwin, is not intended to replace, modify or otherwise affect Westwin’s existing feedstock relationships or arrangements with third parties. asserted

The LOI contemplates that, under any future joint development agreement with Westwin, the Company would provide representative polymetallic nodule samples and available geological and geochemical data for evaluation and Westwin would undertake bench-and pilot-scale test work to assess potential processing routes. asserted

The proposed joint development program would assess the principal processing steps from polymetallic nodule material through intermediate and potential saleable products, with the objective of developing a recommended processing route and process block flowsheet. asserted

Under the LOI, the Company is responsible for the costs associated with providing samples and related data, while Westwin is responsible for the costs of test work conducted at its facilities, unless otherwise agreed by the parties. asserted

The parties contemplate that the proposed technical evaluation would assess whether polymetallic nodules could represent an additional potential feedstock source for future U.S.-based critical mineral processing capacity. uncertain

“Evaluating potential downstream processing pathways is an important part of our work to understand how polymetallic nodules could ultimately fit within a U.S.-based critical minerals supply chain,” said James Deckelman, Chief Executive Officer of Deep Sea Minerals Corp. uncertain

“This non-binding arrangement with Westwin provides a framework for future discussions of a joint development agreement to evaluate the technical work required to assess potential processing routes. asserted

The current focus is on technical evaluation, and any future commercial relationship would remain subject to applicable conditions and the negotiation and execution of definitive agreements.” asserted

“Westwin’s potential collaboration with Deep Sea Minerals is an important development towards strengthening the nation’s critical mineral supply chain,” said KaLeigh Long, founder and CEO of Westwin. asserted

“By evaluating new potential sources of critical mineral feedstock alongside domestic processing capabilities, we are working to expand the options available to support U.S. national security and resilience. asserted

We look forward to bringing Westwin’s processing expertise to this potential collaboration and exploring the potential of polymetallic nodules as an additional domestic resource. asserted

If the parties enter into a definitive joint development agreement in the future, and the contemplated technical program identifies a processing route that the parties determine to be technically and commercially viable, the Company and Westwin may consider a longer-term commercial relationship involving the Company supplying Westwin with polymetallic nodule feedstock. uncertain

Any future supply arrangement would remain subject to, among other things, successful technical evaluation, applicable funding conditions, the Company obtaining the required exploration and/or commercial recovery rights and regulatory approvals, sufficient processing capacity, commercial viability and the negotiation and execution of definitive agreements. asserted

The Company has not committed to provide Westwin with any minimum quantity of polymetallic nodule material, and neither party currently has any binding supply, offtake or commercial processing obligation. asserted

There can be no assurance that any ongoing commercial relationship with Westwin will ever materialize or that the Company will ever be able to provide a commercial supply of polymetallic nodule feedstock. asserted

The Company intends to enter into a third extension of its investor relations and marketing agreement with Capital Gain Media Inc. (“CGM”), originally announced on February 24, 2026, and previously extended June 4 and July 9, 2026, subject to the approval of the Canadian Securities Exchange (the “CSE”). asserted

Under the proposed extension, CGM would continue to provide investor awareness, digital marketing, content development, and related communication services in support of the Company’s capital markets initiatives. asserted

The extension would continue for up to 90 days, or until the allocated marketing budget has been exhausted. asserted

The Company intends to allocate an additional marketing budget of US$100,000, plus applicable taxes, for the extended term. asserted

CGM has a business address located at 1111 West Hastings Street, 15th Floor, Vancouver, V6E 2J3 and its principal Graham Colmer can be contacted at admin@capitalgainmedia.com. asserted

Westwin Elements is scaling America’s only Class 1 nickel refinery, delivering high-purity Class 1 nickel and specialized nickel products for national security and industrial applications. asserted

Using carbonyl refining technology, Westwin is driving critical mineral independence and reshaping the future of sustainable metal refining. asserted

Deep Sea Minerals Corp. is a subsea mineral exploration and development company focused on evaluating opportunities to support the future supply of critical minerals through the acquisition, exploration, and development of deep-sea mineral assets. asserted

The Company’s strategy is centered on identifying jurisdictions and geological settings with potential exposure to polymetallic nodule systems, which are recognized for containing combinations of metals that may be relevant to defense, industrial manufacturing, clean energy infrastructure, advanced electronics, and artificial intelligence-related supply chains. uncertain

These seabed resources represent a largely undeveloped component of the global mineral supply base and are the subject of increasing policy, scientific, and regulatory attention worldwide. asserted

As part of this process, the Company has commenced early-stage engagement with selected governments and regulatory bodies in the Pacific Ocean region to assess potential pathways for future exploration initiatives, subject to applicable international, national, and environmental frameworks. asserted

SOCIAL MEDIA ON BEHALF OF THE BOARD “James A. Deckelman” James A. Deckelman, Chief Executive Officer For further information, please contact: James A. Deckelman Chief Executive Officer Phone: 1-281-467-1279 The Canadian Securities Exchange does not accept responsibility for the adequacy or accuracy of this release and has neither approved nor disapproved the contents of this press release. Forward-Looking Statements asserted

This news release contains certain forward-looking statements and forward-looking information (collectively, “forward-looking statements”) that relate to the Company’s current expectations and views of future events. asserted

In some cases, these forward-looking statements can be identified by words or phrases such as “may”, “might”, “will”, “expect”, “anticipate”, “estimate”, “intend”, “plan”, “indicate”, “seek”, “believe”, “predict” or “likely”, or the negative or grammatical variations of these terms, or other similar expressions intended to identify forward-looking statements, although not all forward-looking statements include such words. uncertain

The Company has based these forward-looking statements on its current expectations and projections about future events and financial trends that it believes might affect its financial condition, results of operations, business, prospects and financial needs. uncertain

Forward-looking statements contained in this news release include, but are not limited to, statements about: the Company’s plans and strategies, including the potential acquisition of subsea mineral exploration or exploitation rights; any future joint development or other definitive agreement with Westwin; the execution of a joint development program; the successful identification of a technically and commercially viable processing route; any supply or other agreement with Westwin; the Company’s ability to supply polymetallic nodule feedstock; and the Company’s third extension of its agreement with CGM. asserted

This forward-looking information and other forward-looking information are based on our opinions, estimates and assumptions in light of our experience and perception of historical trends, current conditions and expected future developments, as well as other factors that we currently believe are appropriate and reasonable in the circumstances. asserted

Despite a careful process to prepare and review the forward-looking information, there can be no assurance that the underlying opinions, estimates and assumptions will prove to be correct. asserted

Material factors underlying forward-looking information and management’s expectations include certain assumptions in respect of, among other things: favourability of operating conditions; the receipt of necessary third party approvals, licences or permits on favourable terms; the result of any potential legal, regulatory or geopolitical conflict resulting from the United States asserting governance of subsea mineral exploration and development in international waters under the Deep Seabed Hard Mineral Resources Act (“DSHMRA”); the continued cooperation and alignment of national interests between the United States and the Cook Islands; the Cook Islands’ intention to grant mining licenses in the future; the availability of equipment; the availability of qualified vessel operators and marine contractors; our ability to obtain financing on acceptable terms; currency exchange and interest rates; the impact of competition; the changes and trends in our industry and the global economy; changes in laws, rules, regulations and global standards; our ability to build our market share; our ability to retain key personnel; transaction opportunities, exploration potential, and precious metals prices; the sufficiency of the Company’s amended application for an exploration licence for a defined area of the Clarion-Clipperton Zone in the Pacific Ocean (the “NOAA Application”) under DSHMRA, submitted on July 17, 2026, in responding to the requests for supplemental information in NOAA’s notice to the Company dated May 26, 2026; that NOAA will require no further information from the Company in order to determine the NOAA Application is in full compliance with applicable regulatory requirements; that the federal-agency consultation, antitrust review, public-comment, certification, environmental-review and hearing processes applicable to the NOAA Application will proceed generally in accordance with the indicative regulatory periods described in the Company’s amended and restated annual information form for the year ended December 31, 2025, dated July 27, 2026 (the “A&R AIF”); that NOAA will not identify material deficiencies relating to the Company’s financial responsibility, technical capability, proposed exploration plan, environmental information, proposed licence area or other regulatory requirements that the Company is unable to address; that a licensing process or invitation will be available under the Cook Islands seabed minerals regime on terms allowing the Company to submit an application for an exploration licence in the exclusive economic zone of the Cook Islands (the “Cook Islands Application”); that the Company will be able to complete the technical, financial, environmental, corporate and work-program materials required for the Cook Islands Application within its anticipated timeframe; that the Company will be able to demonstrate access to sufficient financial resources, technical expertise, vessels, equipment, contractors and environmental capabilities to satisfy the applicable NOAA and Cook Islands regulatory requirements; that the Company will obtain sufficient financing to fund the regulatory, environmental, technical and offshore activities contemplated by its NOAA and Cook Islands work programs when required; that the Cook Islands election process and any related government transition will be completed without material delay; that following the election, the Cook Islands authorities will designate additional parcel blocks or areas for subsea mineral exploration and exploitation; that there will be no material change in Cook Islands policy, legislation, licensing criteria or regulatory priorities following the election; that Westwin will continue to intend to make a joint development or other definitive agreement with the Company in the future; that Westwin will be able to perform the proposed joint development program; the proposed joint development agreement will be executed successfully; the existence of a technically and commercially viable processing route; the Company obtaining all licenses, permits and other regulatory approvals required to explore, recover, test mine and harvest subsea polymetallic nodules; and the existence of a sufficient supply of subsea polymetallic nodules for commercial processing in any area for which the Company may obtain subsea mineral exploration or commercial recovery rights. The forward-looking information in this news release is necessarily based on a number of opinions, estimates and assumptions that we considered appropriate and reasonable as of the date of the A&R AIF. uncertain

It is also subject to known and unknown risks, uncertainties, assumptions and other factors that may cause the actual results, level of activity, performance or achievements to be materially different from those expressed or implied by such forward-looking information, including but not limited to the risk factors and uncertainties described under “Risk Factors” in the A&R AIF, as well as risks related to the highly speculative nature of the Company’s business; risks related to subsea mineral exploration and development operations; risks related to the Company’s limited business history and no history of earnings; risks related to the availability of future financing and the Company’s ability to continue as a going concern; risks related to the Company’s exploration and development activities on the mineral properties; uncertain