Heritage Intersects Up to 22.0 g/t Au in Core, Identifies Multiple VG Occurrences in Recent Drilling, and Targets Stacked Vein Structure, at Melba Project (TheNewswire) VANCOUVER, BC, April 16, 2026 – TheNewswire - Heritage Mining Ltd. (CSE: HML FRA: Y66) (“Heritage” or the “Company”) is pleased to announce results from the ongoing drilling program at Melba Project. Partial assays are reported from drill hole ML3840-003, which returned 22g/t Au over 0.50m from 79m and two broader and lower grade intersections of 0.21g/t Au over 6.9m (from 9m) and 0.23g/t Au over 6.1m (from 69.9m). In the most recent drill hole M3855-001 (Assays Pending) Heritage geologist identified three occurrences of very coarse gold (Figure 1) over a 30m interval that contains multiple quartz veins (Figure 2). Melba Project – Multiple Visible Gold Occurrences Click Image To View Full Size Figure 1: ML3855-003 VG “Multiple visible gold occurrences in ML3855-001, together with recent assays grading up to 22.0 g/t Au over 0.5m highlights the emerging high-grade nature of the Melba system. By extending holes ML3800-001 and ML3800-002 beyond the Blue Vein, we are now testing a potential stacked vein system. Drill hole M3855-001 is impressive, we are seeing multiple occurrences of coarse gold, we believe this is part of a much larger mineralized system at Melba.” Commented Peter Schloo, President, CEO and Director of Heritage. Click Image To View Full Size Figure 2: ML3855-001 (Box 22 and 23) The Company is also pleased to announce an expansion of the planned drilling program at Melba, which will be targeting three historical gold-bearing veins (Mike Vein, Rolling Vein, and the Contact Vein) southwest of the “Blue Vein”. Historical reports and maps show visible gold occurrences at all four veins (Blue Vein, Mike Vein, Rolling Vein and Contact Vein) and newly designed holes bisect all veins. Click Image To View Full Size Figure 1: Melba Mine Cross Section ML3840 Multiple Anomalous gold zones identified with higher grade in the middle of drill hole ML3840-003(Partial Assays): 0.21g/t Au over 6.9m from 9m, 0.23g/t Au over 6.1m from 69.9m 22g/t Au over 0.50m from 79m Further to the press release dated March 2, 2025. The top of hole ML3850-004 returned encouraging results including: 1.26g/t Au over 7m from 47m, including 6.33g/t Au over 1m Au and 1.89g/t Au over 1m, Prior Assays 0.5g/t Au over 6m from 83m 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 Mine (Grey Fox Mine, +1Moz Au) ~22km away, and the Ross Mine (+1Moz Au) ~16km away. 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