Heritage Mining Ltd. — Regulatory Filings 2025

Nov 19, 2025

NOT INTENDED FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

HERITAGE
MINING LTD

Visible Gold Shines in Heritage Mining's Historic Drilling — Up to 23.27 g/t Au Over 4.5m and 6.85 g/t Au Over 12.35m near Surface at the Melba Project

VANCOUVER, BC, October 15, 2025 – Heritage Mining Ltd. (CSE: HML FRA: Y66) (“Heritage” or the “Company”) is pleased to provide historical highlights supporting a Phase 1 Exploration plan further to the press release dated September 23, 2025, the closing of the Melba Property Acquisition in Northeastern Ontario Canada within the Timmins/Kirkland Lake Gold Camp (Figure 10). The Melba Mine is located 22km southeast from the Ross Mine along the Ross Fault (Figure 10). The Company anticipates to mobilize this program in short order.

Melba Mine Exploration Plan Highlights:

• Diamond Drilling Q4 2025/Q1 2026 designed to confirm multiple high-grade historical results (Figure 1, 3-6), 26 Diamond Drill holes totalling ~1,780m:
• Historical Highlights (See figure 2-9)
• Up to 23.27 g/t Au Over 4.5m and 6.59 g/t Au Over 12.87m near Surface

• Multiple occurrence of visible gold in multiple drill holes and surface workings (Figure 1,2)

• Systematic Sampling of Ore and Rock piled located in close proximity to the Melba Mine (Figure 1)

• Ore Pile 2012 Bulk Sample results average grade of 3.99g/t, ore pile estimated to be 2000 short tonnes or 230.90 oz Au estimated (Nordex Explosives Ltd. Report June 25, 2012), Figure 1

• Rock Piles historically sampled up to 2.23g/t Au (Advanced Exploration Data, 2025)

• Detailed inspection of four veins identified through historical prospecting and trenching:

• The Rolling Vein, The Mike Vein, The Blue Vein, The Contact Vien

• “The Blue Vein is the most important and is the on the underground workings was carried out on” (Assessment Report, 1962), multiple historical occurrences of Visible Gold at surface (Figure 1)

• Geophysical interpretation of historical data

Note: All Ore/Rock Pile Sampling with be submitted for gold assays

“We are very impressed with multiple high-grade historical intercepts at the Melba Mine from historical reports. We look forward to systematically confirming historical high-grade results in the near term and developing this project.” Commented Peter Schloo, President, CEO and Director of Heritage Mining Ltd.

---

Figure 1: Melba Property - Historical Map

Melba Highlights for High-Grade Historical Confirmation
Area	Description	g/t Au	interval (m)	Notes
1	1960 - UG - Q - 60	12.56	2.74	Visible Gold noted in core
	1960 - UG - Y - 60	23.27	4.57	Visible Gold noted in core
	1960 - UG - T - 60	13.23	1.98
	1960 - UG - S - 60	1.79	3.63
	1937DDH 14	18.04	0.4	Visible Gold noted in core
	Drift Zones
	1937 204 West Drift Zone 8.11g/t Au over 0.91m for 3.23m (Drift Length)
	1937 204 West Drift Zone 5.88g/t Au over 0.91m for 8.54m (Drift Length)
	1937 204 East Drift Zone 13.23g/t Au over .91m for 8.54m (Drift Length)
Historical Decline Shaft Values up to 22.21g/t Au
Melba Highlights for High-Grade Historical Confirmation
	Description	g/t Au	interval (m)	Notes
2	1960 - UG - B - 60	6.85	12.35	Multiple Visible Gold Noted in core
	1960 - UG - C - 60	3.76	6.25	Multiple Visible Gold Noted in core
	1960 - UG - C - 60	5.77	9.15	Multiple Visible Gold Noted in core
	1937 DDH 7	0.79	1.74
	1937 DDH 7	4.2	2.13
	Drift Zones
	206 E Zone: 11.29g/t Au over 1m for 51.52m
Melba Highlights for High-Grade Historical Confirmation
	Description	g/t Au	interval (m)	Notes
3	1937 DDH4	1.24	0.44
	1937 DDH4	5.71	2.44	Visible Gold Noted in core
	1937 DDH5	0.94	1
	1937 DDH8	6.84	1.68
	1937 DDH8	1.76	0.07
	1960 UG - J - 60	3.03	6.1
	1960 UG - 60	19.9	0.98	Visible Gold Noted in core
	1960 UG - 60	25.33	1.07	Visible Gold Noted in core
	1937 DDH 18	12.07	4.12
4	1937 DDH 2:	8.18	1.98
	1937 - 206W Rib	11.81	0.81
	DDH15	1.62	1.62

Figure 2: Melba Historical Highlight Compilation from Assessment reports and Historic Maps, Historic calculations have been re-calculated to g/t Au from $35\mathrm{S}$ gold, the Company used Troy Ounce

---

Figure 3: Melba Historical Highlight Compilation from Assessment reports and Historic Maps, Historic calculations have been re-calculated to g/t Au from $35\mathrm{S}$ gold, the Company used Troy Ounce

Figure 4: Heritage Mining Ltd. - Diamond Drill Hole Exploration Plan for Historical Confirmation - Area 1 - Plan View
Figure 5: Heritage Mining Ltd. - Diamond Drill Hole Exploration Plan for Historical Confirmation - Area 1 - Plan View

---

Melba Property - Historical Confirmation Area 1

Figure 6: Heritage Mining Ltd. - Diamond Drill Hole Exploration Plan for Historical Confirmation - Area 1 - Cross Section

Figure 7: Heritage Mining Ltd. - Diamond Drill Hole Exploration Plan for Historical Confirmation - Area 2 - Cross Section

---

Figure 8: Heritage Mining Ltd. - Diamond Drill Hole Exploration Plan for Historical Confirmation - Area 3 - Cross Section

Figure 9: Heritage Mining Ltd. - Diamond Drill Hole Exploration Plan for Historical Confirmation - Area 4 - Cross Section

Melba Property

The Melba Mine is located in Northeastern Ontario, Canada Southeast of Matheson Ontario (Figure One) approximately seven kilometers east off the Highway 11, on the section of highway travelling from Kirkland Lake to Cochrane. The Melba Mine is located in northeastern Ontario close to the Ontario and Quebec border.

---

It's fortunate the location of the Melba Property lies within the central hub of over 100 years of mining activities, including active mining operations within the Abitibi Greenstone Belt. The claim package includes single cell mining claims covering 1,522.70 hectares and one mining lease.

Property Geology

The governing element of structure appears to be a contact between dioritic greenstone to the south and argillaceous greywacke to the north. The contact trends north 50-60 degrees west and dips northward. Whether the greywacke is part of a synclinal trough of sediments that are younger than the greenstone or whether it is part of a sedimentary band belonging to the greenstone series is an unknown factor at present. The greywacke is cut by dikes of porphyry that run parallel to the contact. The main gold bearing vein, usually described as the "Blue Vein", also runs parallel to the contact but lies within the sediments. It strikes north 55 degrees west and dips northward 55 degrees. It is accompanied by shearing and alteration, also by a pattern of cross fracturing that has produced faulting in the main vein and has led to the development of irregular veins in the adjacent rocks. The main vein is displaced 60 feet (18.2 metres) northward near the shaft and other displacements have been found underground. The geological setting resembles that of the sedimentary belt in the Beatty-Munro area. Numerous feldspar porphyry, diorite and basic syenite dikes were intersected by the drilling. Overall, a significant amount of the drill core showed alteration, some highly, while carbonate stringers were numerous and visible gold was noted in drill core.

Figure 10: Property Map Melba

Note:

All historical values included in this press release are approximate recalculations from feet to metres and $ per oz to g/t based on historically stated 35$ per ounce gold. Approximate locations of grade mineralization are also included. The purpose is to illustrate potential gold mineralization for historical confirmation through various exploration methods. All calculations and historical drill results are not NI43-101 compliant and can not be relied upon.

---

Qualified Person

Mitchell Lavery P. Geo, Strategic Advisor 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 two high grade gold-silver-copper projects in Northwestern Ontario. The Drayton-Black Lake and the Contact Bay projects are located near Sioux Lookout in the underexplored Eagle-Wabigoon-Manitou Greenstone Belt. Both projects benefit from a wealth of historic data, excellent site access and logistical support from the local community.

For further information, please contact:

Heritage Mining Ltd.

Peter Schloo, CPA, CA, CFA
President, CEO and Director
Phone: (905) 505-0918
Email: peter@heritagemining.ca

FORWARD-LOOKING STATEMENTS

This news release contains certain statements that constitute forward looking information within the meaning of applicable securities laws. These statements relate to future events of the Company. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as "seek", "anticipate", "plan", "continue", "estimate", "expect", "forecast", "may", "will", "project", "predict", "potential", "targeting", "intend", "could", "might", "should", "believe", "outlook" and similar expressions are not statements of historical fact and may be forward looking information. All statements, other than statements of historical fact, included herein are forward-looking statements.

Forward looking information involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance, or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. Such risks include, among others, the inherent risk of the mining industry; adverse economic and market developments; the risk that the Company will not be successful in completing additional acquisitions; risks relating to the estimation of mineral resources; the possibility that the Company's estimated burn rate may be higher than anticipated; risks of unexpected cost increases; risks of labour shortages; risks relating to exploration and development activities; risks relating to future prices of mineral resources; risks related to work site accidents, risks related to geological uncertainties and variations; risks related to government and community support of the Company's projects; risks related to global pandemics and other risks related to the mining industry. The Company believes that the expectations reflected in such forward-looking information are reasonable, but no assurance can be given that these expectations will prove to be correct and such forward-looking information should not be unduly relied upon. These statements speak only as of the date of this news release. The Company does not intend, and does not assume any obligation, to update any forward-looking information except as required by law.

---

This document does not constitute an offer to sell, or a solicitation of an offer to buy, securities of the Company in Canada, the United States, or any other jurisdiction. Any such offer to sell or solicitation of an offer to buy the securities described herein will be made only pursuant to subscription documentation between the Company and prospective purchasers. Any such offering will be made in reliance upon exemptions from the prospectus and registration requirements under applicable securities laws, pursuant to a subscription agreement to be entered into by the Company and prospective investors.