Heritage Widens New Gold Zone up to 8.57g/t Au over 3m and Extends Strike to ~93m at Melba (TheNewswire) VANCOUVER, BC – TheNewswire - March 2, 2026 – Heritage Mining Ltd. (CSE: HML FRA: Y66) (“Heritage” or the “Company”) is pleased to announce the widening and strike extension of the gold zone at its Melba Mine Project (“Melba”) with its ongoing diamond drill program returning up to 8.57g/t Au over 3m from 71m (ML3900-002) and extending the gold zone to 93m along strike intersecting 1.45g/t Au over 4.5m from 66m (ML3840-001) (Figure 1,2). Melba, located ~22km northeast from Kirkland Lake and 90km southeast of Timmins in Northeastern Ontario, Canada. The project is comprised of ~3,886Ha. Melba lies along the Ross Fault, which is a splay off of the Porcupine-Destor Fault Zone and is associated with development stage and historic producing gold mines: McEwen Minings (Grey Fox Mine, +1Moz Au) ~22km away, and the Ross Mine (+1Moz Au) ~16km away (Figure 3). Click Image To View Full Size Figure 1: Melba Mine: Composite Cross Section – New and Existing Gold Zones “The results of widening and strike extension of the new gold zone in the ongoing drill program supports significant exploration potential upside to the Melba Project. We look forward to updating our stakeholders on additional exploration results in short order.” Commented Peter Schloo, President, CEO and Director of Heritage. Click Image To View Full Size Figure 2: Melba Mine: Composite Cross Section – New and Existing Gold Zones Melba Mine Property Description The Melba Mine is located in Northeastern, Ontario, Canada Southeast of Matheson Ontario (Figure 3) approximately seven kilometres west off the King’s Highway 11, on the section of highway travelling from Kirkland Lake to Cochrane. The Melba Mine is located on the northeastern part of Ontario close to Ontario/ Quebec border. The claim package includes single cell mining claims spanning ~3,886 hectares and one mining lease. Technical Program Heritage Mining adheres to a strict QA/QC protocol for handling, sampling, sample transportation and analyses. Chain-of-custody protocols are designed to ensure security of samples until their delivery at the laboratory. Drill core was boxed, covered and sealed at the drill rig site. Core boxes were labelled with the official drillhole name and identified in numerical sequence starting from beginning of the hole to the end. Wooden blocks with the corresponding down hole meterage were inserted after every drill run. Drill core boxes were transported by drilling contactors to the onsite logging facility where Company personnel would take over the core handling. Sampling, Sub-sampling, and Laboratory Analysis for Heritage Mining Melba Project. All drilling at the Melba project recovers NQ core. Drill core is systematically cut in half using a diamond saw. A qualified geologist examines the drill core, marking intervals for sampling and indicating the cutting line. Sample lengths are typically 1.0 metre, adjusted to a minimum length of 0.5 metre as necessary to respect lithological and/or mineralogical contacts and to isolate narrow veins or structures that may contain higher-grade mineralization. Technicians saw the core along the cutting lines determined by the geologist. One half of the core is retained as a witness sample, while the other half is submitted for analysis. Individual sample bags are securely sealed and placed into sealed rice bags, which are then clearly marked with their contents. Heritage Mining submits samples for gold determination by PhotonAssay to Paragon Geochemical - Timmins. (“Paragon”). Paragon operates under a commercial contract with Heritage Mining. Drill core samples are shipped to Paragon for sample preparation at their facilities in Timmins, Ontario. Paragon is an ISO/IEC 17025:2017 accredited laboratory for the PhotonAssay method in addition to a variety of diverse metal determination methods. Analytical Procedures The Paragon procedure for PhotonAssay involves lab applying preparation codes INV-SAM (sample logging via barcode), PREP-PKG (weigh, dry at 100C, crushing to 70% passing 2mm, riffle split ~500g into a PA jar and 250g for pulverization to 85% passing 75 micron) followed by analytical code Au-PA01 which is a non-destructive gold analysis method using high-energy X-rays with a gold detection range from 0.015 ppm to 350ppm. After gold assays are returned, Heritage then may choose to perform multi-element assays on selected samples based on the gold results first with Paragon. In these cases, an aliquot is taken from the previously prepared 250g split for analysis by 48MA-MS (4 acid digestion followed by multi-element ICP-MS analysis for a 48 element suite). ________________________________________ Quality Assurance/Quality Control (QA/QC) The drill program design, QA/QC, and interpretation of results are performed by qualified persons employing a rigorous QA/QC program consistent with industry best practices. Standards and