Mr. Peter Schloo reports

HERITAGE CONFIRMS HIGH-GRADE GOLD MINERALIZATION AT THE MELBA PROJECT RETURNING 15.57G/T AU OVER 9M FROM 43M, INCLUDING: 28.98G/T AU OVER 4.80M

Further to the visible gold occurrence in the press release dated July 29, 2026, and the press release dated Aug. 20, 2026, Heritage Mining Ltd. has confirmed high-grade gold mineralization within a zone comprising multiple centimetre- to metre-scale quartz-rich shear zones that locally display breccia textures.

Melba highlights:

• ML3800-004: 15.57 grams per tonne gold over nine metres from 43 metres;
• Including: 28.98 g/t Au over 4.80 m.

Per the Aug. 20, 2026, press release: Drill hole ML3800-004 displayed the most visible gold occurrences to date, up to two millimetres in size. The coarse gold occurs as disseminated grains within multiple centimetre- to metre-scale shear zones that locally display a brecciated texture. The multiple centimetre- to metre-scale shear zones were intersected obliquely; hence, the zone width is exaggerated (nine m) and true width (approximately six m). Drill holes ML3800-003 and ML3800-004 are the most recent holes testing an interpreted high-grade gold zone identified by Brett Davis in his structural evaluation of the Melba vein system.

"The assays result from ML3800-004 are encouraging, confirming our new structural theory. We look forward to expanding the Melba project footprint through systematic exploration and communicating results to our stakeholders. Drilling program remains ongoing at the time of this press release," commented Peter Schloo, president, chief executive officer and director of Heritage.

Future plans

The company is currently drilling ML3800-005 and will proceed to phase 2 drilling in the near future. Drilling is targeting high-grade gold mineralization along the downdip and along-strike extensions of the multishear/breccia zone.

The company is also working with newly acquired magnetics, electromagnetics and lidar data to identify prospective areas within the Melba property.

Melba is located approximately 22 kilometres northeast from Kirkland Lake and 90 km southeast of Timmins in Northeastern Ontario, Canada. 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) approximately 22 kilometres away and the Ross mine approximately 16 km away.

Technical program

Heritage Mining adheres to a strict quality assurance/quality control 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 drill hole name and identified in numerical sequence starting from beginning of the hole to the end. Wooden blocks with the corresponding downhole metreage were inserted after every drill run. Drill core boxes were transported by drilling contactors to the on-site logging facility where company personnel would take over the core handling.

Sampling, subsampling and laboratory analysis for Heritage Mining's 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 operates under a commercial contract with Heritage Mining. Drill core samples are shipped to Paragon for sample preparation at its facilities in Timmins, Ont. 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 through bar code), Prep-Pkg (weigh, dry at 100 C, crush to 70 per cent passing two millimetres, riffle split approximately 500 grams into a PA jar and 250 g for pulverization to 85 per cent 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 part per million to 350 part per million. After gold assays are returned, Heritage then may choose to perform multielement assays on selected samples based on the gold results first with Paragon. In these cases, an aliquot is taken from the previously prepared 250-gram split for analysis by 48MA-MS (four-acid digestion followed by multielement ICP-MS analysis for a 48-element suite).

Quality assurance/quality control

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 blanks account for a minimum of 10 per cent of the samples, in addition to the laboratories' internal quality assurance programs. Quality control data are meticulously evaluated upon receipt from the laboratories for any failures. Appropriate corrective action is taken if assay results for standards and blanks fall outside of allowed tolerances. All results disclosed by Heritage Mining have passed the company's stringent quality control protocols. The company does not recognize any factors of drilling, sampling or recovery that could materially affect the accuracy or reliability of the assay data disclosed. The assay data disclosed in this press release have been verified by the company's qualified person against the original assay certificates. Heritage Mining notes that it has not completed any economic evaluations of its Melba project, and the project does not currently have any resources or reserves.

Qualified person

Stephen Hughes, PGeo, strategic adviser for the company, serves as a qualified person as defined by National Instrument 43-101 (Standards of Disclosure for Mineral Projects), and has reviewed the scientific and technical information in this news release, approving the disclosure herein.

About Heritage Mining Ltd.

The company is a Canadian mineral exploration company advancing its Ontario project portfolio in Northwestern and Northeastern Ontario. The Drayton-Black Lake, Contact Bay and Scattergood projects are located near Sioux Lookout in the underexplored Eagle-Wabigoon-Manitou greenstone belt. The Melba property is located near Ramore, Ont. All projects benefit from a wealth of historic data, excellent site access and logistical support from the local community.

We seek Safe Harbor.