Avalon Advanced Materials will participate in Sidoti's Micro-Cap Virtual Investor Conference on June 17-18, 2026. President & CEO Scott Monteith and CFO Lorin Crenshaw will present Avalon’s strategy to advance critical minerals projects that support secure North American lithium and rare earth supply chains and will host one-on-one meetings with investors. Presentation: June 17, 2026 8:30 a.m. ET Read the full news release and registration details here: hubs.ly/Q04kZdjQ0

.@AvalonAdvanced is a Canadian critical minerals developer advancing an upstream rare earth and zirconium deposit, Nechalacho in the NWT, alongside a downstream lithium hydroxide refinery, Lake Superior Lithium in ON. Studies at both flagship projects, including the Nechalacho PEA refresh and the Lake Superior Lithium FS, should help define technical goals and allow involvement and funding by strategic and government-backed partners. Learn more: ow.ly/jMMU50Z8NiG $AVL

Avalon Advanced Materials invites shareholders and investors to join a live Investor Update Call today at 4:15 p.m. ET. CEO Scott Monteith and CFO Lorin Crenshaw will discuss Avalon’s evaluation of potential U.S. capital markets opportunities, including a possible future U.S. exchange listing, as well as the proposed share consolidation and its role in the Company’s broader growth strategy. A live Q&A session will follow the presentation. June 8, 2026 4:15 p.m ET Register here: hubs.ly/Q04kwJk20 Dial-In Information: 1 (719) 359-4580 Access ID: 828 2798 7369

Avalon Advanced Materials has announced a Special Meeting of Shareholders to seek approval for a proposed share consolidation as part of its evaluation of potential U.S. capital markets opportunities. The proposed share consolidation is intended to support greater capital markets flexibility, broader investor access, and alignment with Avalon’s long-term growth strategy as it advances its lithium and rare earths portfolio. Shareholders are encouraged to review the meeting materials and vote on the proposed resolution at the Special Meeting on June 29, 2026. Read the full news release:hubs.ly/Q04khX5c0

Avalon is pleased to announce that CFO Lorin Crenshaw will be presenting at The Small Cap Showcase & WTR Insights Conference on June 9, 2026, in New York City. Join us at 1:00 PM ET for a live corporate presentation and discussion on Avalon's strategy to support a secure North American critical minerals supply chain through the development of our lithium and rare earth assets. For more information about The Small Cap Showcase & WTR Insights Conference, including registration details, please visit hubs.ly/Q04jz3rC0. A live webcast of the Company's presentation will be available at: hubs.ly/Q04jzybF0 A replay of the presentation will be available following the event and may also be accessed through the Company's website under the Investor Relations section.

After a productive week on the ground in Yellowknife, the Avalon team has landed at the Nechalacho rare earth site.

Avalon continues to advance the Nechalacho Rare Earth Elements and Zirconium Project as part of its strategy to support a more secure North American rare earth supply chain. Today’s update highlights several important milestones, including the establishment of Magmic Rare Earths Inc., advancement of an updated PEA, expansion of northern engagement efforts, and continued evaluation of processing pathways for magnet-critical materials. As global focus on critical minerals and supply chain security accelerates, Avalon believes Nechalacho has the potential to become an important strategic rare earth development platform in North America. Read More:hubs.ly/Q04h7w7r0

Avalon Advanced Materials is pleased to announce the appointment of Christopher Senyk as Vice President, Corporate Development, supporting the advancement of the Company’s critical minerals portfolio and strategic growth initiatives across lithium, rare earth elements, and broader North American supply chains. Read more:hubs.ly/Q04gqrn40

Avalon is pleased to share that President & CEO Scott Monteith will be speaking at the Critical Minerals for Defence conference taking place June 9–10 in Toronto. The conference will unite global mining leaders, investors, government officials, and defence stakeholders to drive strategic discussion on the role of critical minerals in strengthening secure, resilient, and allied supply chains essential to economic security, industrial competitiveness, and national security. For more information: hubs.ly/Q04g58Zv0

Today, Avalon management attended the U.S. Export Import Bank’s Annual Conference in Washington, D.C., joining discussions focused on Fortress North America, supply chain security, and the critical minerals needed to support the industries of the future.

Last week, Avalon was pleased to join MPP Holland and his Cabinet colleagues in the riding of Thunder Bay–Atikokan, supporting the government’s announcements to advance economic development opportunities in the region and protect Ontario.

Avalon Advanced Materials is pleased to be included in the newly launched Sprott Rare Earths Ex-China ETF (REXC), managed by Sprott Asset Management. The ETF targets companies across the rare earths value chain outside of China, highlighting increasing global focus on supply chain resilience. Avalon’s Nechalacho Project provides exposure to magnet rare earth elements that are critical to high-performance technologies and represent the majority of economic value in the sector. Read more:hubs.ly/Q04cTyqN0

Avalon is pleased to see the Nechalacho Project recognized among North America’s top critical mineral projects. As global focus intensifies on building secure rare earth supply chains, Nechalacho continues to be highlighted for its strategic role in supporting electrification, advanced manufacturing, and defense applications. A strong signal of where the future of critical minerals is heading. Read more:hubs.ly/Q04cNCsC0

Not all rare earths are created equally. Neodymium (Nd), praseodymium (Pr), dysprosium (Dy), and terbium (Tb) represent only 35–40% of 2025 volume, yet accounted for more than 95% of market value in 2025 and are projected to reach 99% of total REE market value by 2040. Avalon’s Nechalacho Project hosts one of the highest concentrations in North America of the four magnet rare earth elements. Critical to high performance permanent magnets used in EVs, wind turbines, and advanced technologies, this strong concentration positions Avalon to supply the most economically significant rare earths, strengthening a secure North American supply chain.

Avalon Advanced Materials Inc. announced today the completion of its Separation Rapids joint venture reorganization with SCR-Sibelco NV, exiting its 40% interest in Separation Rapids Ltd. and retaining full ownership of the Lilypad cesium project. The Company emerges debt-free with enhanced strategic focus, reduced dilution, and a simplified corporate structure. • ~$7.5M debt eliminated • Convertible debenture extinguished • ~15% potential dilution removed • 100% ownership of Lilypad cesium project regained Read the full release here: hubs.ly/Q049rWgZ0

At PDAC 2026, CEO Scott Monteith joined Angela Harmantas to discuss how Avalon Advanced Materials Inc. is advancing its lithium and rare earth platforms across Canada. • Advancing the Nechalacho Rare Earth Elements Project • Progressing a lithium hydroxide refinery in Thunder Bay • Leveraging strategic partnerships to accelerate development As demand grows across electrification and defence, Avalon is focused on building resilient, North American supply chains. Watch the full interview: hubs.ly/Q0496D5w0

Avalon Advanced Materials is pleased to announce the addition of Burl Joseph, M.Eng., BSc, E.S., as Project Director to lead the advancement of the Nechalacho Rare Earth Elements and Zirconium Project in the Northwest Territories. Mr. Joseph brings 15 years of experience spanning mining, permitting, environmental management, Indigenous engagement, and remote northern infrastructure projects, strengthening Avalon’s leadership at a pivotal stage. With Nechalacho among the few rare earth projects in North America to reach feasibility-level evaluation and secure early works permits, Mr. Joseph’s appointment marks a key step toward project execution as updated engineering and development planning progress. Read the full news release here: hubs.ly/Q048V8Bb0

Today, Avalon’s full technical team and engineering partners have come together in Thunder Bay to advance the Lake Superior Lithium (LSLi) Project feasibility work. With a fully integrated team on the ground, key contributors from Avalon, LSLi, Nordmin, Primero Americas, and Krech Ojard are progressing the detailed engineering required to complete the feasibility study by 2027 and position the project for development.

Avalon Advanced Materials is pleased to announce the appointment of Glen Smith, P.Eng., as Project Director, Refinery Feasibility & Construction for the Lake Superior Lithium Inc. Project, based in Thunder Bay, Ontario. With more than 35 years of experience across the hydrometallurgical, petrochemical, and nuclear industries, Glen will support the next phase of feasibility and engineering work as Avalon advances the project toward development. Read More: hubs.ly/Q046X64D0

Avalon Advanced Materials is pleased to announce the re-engagement of Dave Marsh to support advancement of the Nechalacho Rare Earths and Zirconium Project in the Northwest Territories. Dave previously led the metallurgical programs behind the project’s 2013 Definitive Feasibility Study. His expertise will support Avalon’s next phase of technical work as we continue advancing Nechalacho as a strategically important rare earth project. Read more: hubs.ly/Q045BMDg0