Allied GOLD Reports Exploration Results at Sadiola Demonstrating Continued Discovery in a World-Class GOLD Mineralized System
NEWS RELEASE
ALLIED GOLD REPORTS EXPLORATION RESULTS AT SADIOLA DEMONSTRATING CONTINUED
DISCOVERY IN A WORLD-CLASS GOLD MINERALIZED SYSTEM
TORONTO, ON – October 29, 2025 – Allied Gold Corporation (TSX: AAUC, NYSE: AAUC) (“Allied” or the
“Company”) is pleased to provide an update on the ongoing exploration and development activities at its
Sadiola Mine in Mali, West Africa , highlighting continued discovery and resource expansion across
multiple zones within this world -class gold mineralized system . This is the first of three planned
exploration updates, with further releases covering the Company’s Kurmuk Project in Ethiopia and its Côte
d’Ivoire assets expected in the coming months, all of which underpin the significant value and optionality
in the Company’s portfolio , already characterized by peer-leading mineral inventories and production
growth.
2025 Sadiola Exploration Program and Highlights
The Sadiola Mine is a long-life mine undergoing a transformational two-phased expansion plan, the first
phase of which is expected to be completed this quarter. Over the longer -term, Sadiola is expected to
produce up to 400,000 gold ounces per year at substantially lower costs, well below cu rrent costs and
industry averages, which is planned to materially contribute to increasing cash flows. With a robust
inventory of Mineral Resources and Mineral Reserves supporting increasing production for a long mine
life, and with most, if not all mineralized zones open along strike and/or at depth, Allied has undertaken
an extensive exploration plan for the following purposes, all of which are expected to create additional
value at low finding costs: i) extending mine life likely well beyond the 19 years currently expected from
existing Mineral Res erves, ii) increasing operational flexibility and efficiency with the identification and
delineation of additional areas of mining, and iii) targeting new mineralized areas th at appear to show
better grades.
The Company’s five -year exploration goal for Sadiola is to reach over 14 million ounces of Mineral
Resources, representing a sequential target of over 3.5 million ounces of new Mineral Resources in
addition to the current inventory. The objective includes adding approximately 1.0 million ounces of new
oxide, which, in turn, supports Sadiola’s medium -term and long -term expansion strategy , providing
upside and optionality as discussed below. Mineral Resources and Mineral Reserves updates are planned
to be presented on a yearly basis to document the ongoing mineral inventory buildout program, which is
expected to be carried out with similar levels of annual expenditures to the approximately $12 million
committed for the current year. Further, as the Phase 1 Expansion at Sadiola allows for the treatment of
a higher proportion of abundant, higher-grade fresh ore, the Company expects an increase in the mine’s
efficiency and overall performance by concentrating mining operations in fewer, bulkier areas and using
new oxide areas as incremental production upside.
Five-Year and Near-Term Exploration Targets
• Sadiola Main: five-year target of 1.5 million ounces of dominantly fresh ore
• Tambali: three-year target of 1.0 million ounces of fresh/oxide ore
• Sekekoto/S12 Trend: two-year target of 0.35+ million ounces of oxide/fresh ore
- 2 -
• FE2 and FE3/4 Trends: three-year target of 0.70+ million ounces of oxide/fresh ore
New Discoveries and Zone Extensions Highlights
Exploration drilling has intersected significant new zones and extensions at Sekekoto West/S12, Tambali,
FE2 Trend, and FE3/4 Trend (see Figure 1 for zone locations) with Sekekoto West and the southern part
of the FE2 Trend (FE2.5) potentially providing short-term, new and more proximal high-grade oxide
resources for the Sadiola mill as mining at Korali Sud winds down. Mineralization remains open along
strike and at depth across all four target areas. Highlights include:
• Sekekoto West/S12: 33.0 m @ 15.23 g/t Au (SARC 1699) and 25.0 m @ 11.90 g/t Au
(SARC1695)
• Tambali: 12.6 m @ 18.87 g/t Au (SADD181) and 6.7 m @ 8.74 g/t Au (SADD264)
• FE2 Trend: 3.0 m @ 28.19 g/t Au (SARC2318) and 8.0 m @ 6.55 g/t Au (SARC2321)
• FE3/4 Trend: 18.0 m @ 10.68 g/t Au (SARC1957) and 20.0 m @ 5.53 g/t Au (SARC1948)
- 3 -
Figure 1: Sadiola Project Plan Map
TK1
FE2.5
FE2N
S12
- 4 -
Exploration Progress Highlights by Zone
Sadiola Main
• This 2,500 m × 200 m deposit remains open down-plunge to the south and at depth beyond
800 m, with excellent potential for underground development
• Drill testing commenced in late Q3 2025 targeting down-plunge and down-dip extensions and
additional oxide zones along the western side of the deposit
• See Figure 2 for Sadiola Main Deposit Geology and Drill Plan , and Figure 3 for Sadiola Main
Deposit Reference Section
Tambali
• A 2,200 m × 500 m mineralized zone, located 600 m to the west of the Sadiola Main Pit, that
remains open to the north, northeast and at depth
• 2025 drilling (44 holes, 12,005 m) intersected multiple fresh rock zones including 12.6 m @
18.9 g/t Au and 31.2 m @ 2.8 g/t Au
• A drill program targeting high-grade oxide targets is planned for late 2025/early 2026 with
updated modelling and resource estimate updates in Q1 2026
• See Figure 4 for Plan view Tambali Geology and Drilling, and Figure 5 for Tambali Type Section
Sekekoto West and S12
• Sekekoto West oxide and fresh mineralization has been traced for 1,400 m along strike and
remains open to the north towards S12
• 2025 drilling (91 holes, 9,281 m) intersected grades up to 25.0 m @ 11.9 g/t Au and 41.0 m @
7.1 g/t Au.
• Geophysical surveys are planned to trace the mineralized contact zone north toward S12 and
for another 1,400 m to the north of S12
• See Figure 6 for Sekekoto West and Sekekoto Drill Plan and modelled/active pits, and Figure
7 for Type Section Sekekoto West Deposit
FE2 Trend
• Oxide and fresh gold mineralization has been traced continuously for over 3.9 km and remains
open to the north and at depth
• 2025 drilling (452 holes, 26,378 m) returned intercepts including 3.0 m @ 28.19 g/t Au and
23.0 m @ 1.92 g/t Au, highlighting ongoing near-surface potential
• Additional drilling planned to extend mineralization to north and infill as necessary. An
updated mineral resource is planned for Q1 2026
• See Figure 8 for FE2 Trend Geology and Drill Plan and Figure 9, as a typical section of FE2N
FE3/4 Trend
• Covers a 3.25 km × 1.1 km mineralized corridor with historic production of 1.33 Moz(1)
• Recent intercepts of 18.0 m @ 10.68 g/t Au and 17.0 m @ 4.90 g/t Au confirm the potential
for resource expansion down -dip and along NE -trending shears subject to ongoing
metallurgical studies
- 5 -
• 80 of a planned 200-hole resource conversion program now completed. Obvious additional
places to test, especially along northeast-trending structures
• See Figure 10 for FE3/FE4 Pits, Summary Geology and Drill Plan, Figure 11 for FE4 Pit Grade
Dot Plot, Allied Drilling and Section Location, and Figure 12 for Interpreted Geological and
Drill Section Through FE4 Pit
Detailed Drill Data
Significant drill intercepts, with a 0.5 g/t Au cut-off, since January 2025, by zone, are available through the
following link. Estimated true widths vary from 45% to 90% drilled length with true widths in Sekekoto
holes SARC1631, 1632, 1685, 1691 and 1699, are not clear as they were drilled semi-parallel to the zone.
A summary of drill hole collars can be found at this link.
Discussion and Next Steps
Since January 1, 2025 , Allied Gold’s exploration, comprising 700 holes totaling 60,496 m of drilling
(including sterilization drilling), has focused on targeting oxide gold mineralization with a lesser emphasis
on fresh-rock-hosted gold mineralization. Significant amounts of oxide and fresh rock gold mineralization
have been intersected at the Tambali, Sekekoto/S12 Trend, FE2 Trend and FE4 zones (see Figure 1 for
locations). This ongoing work highlights Allied's commitment to creating long-term value through focused
and sustained exploration. The next steps of the program are summarized below:
• Continued drilling across FE2 Trend, FE3/4, Sekekoto West/S12, Tambali and Sadiola
through Q4 2025 and into 2026 and beyond
• Initiation of IP geophysical surveys along a 2.3 km gap between Sekekoto West and S12 and
north of S12 to the boundary of the historic IP survey
• Resource modelling and updated mineral resource estimate for multiple zones expected in
Q1 2026
• Ongoing 3D geological modelling integrating magnetic, gravity, and electromagnetic survey
data to identify additional blind targets
Strategic and Development Context
Allied Gold’s 2025 exploration program continues to deliver strong results across multiple target areas ,
providing Sadiola with increased operational flexibility in the short term as well as optionality to leverage
its increased sustainable production capacity after completing the Phase 1 Expansion later this year and
in preparation for subsequent phases.
The completion of the initial expansion will allow Sadiola to treat up to 60% of fresh rock at a rate of up
to 5.7 Mt/y in the modified process plant, allowing the mine to produce within an expected range between
200,000 and 230,000 ounces of gold per year in the medium term, with the higher end of the range driven
by the addition of moderate-to-high-grade oxide ore to the plant feed.
The Phase 2 Expansion, currently planned as a new processing plant with capacity of up to 10 Mt/yr of
fresh and oxide ore with targeted start production in late 2028, is expected to increase production to an
average of 400,000 ounces per year for the first four years and 300,000 ounces per year on average for
- 6 -
the mine's life, with AISC(2) expected to decrease to below $1,200 per gold ounce. Further, the Company
is conducting engineering studies to determine the optimal path for expansion, including the option of
progressively expanding the existing plant after the Phase 1 Expansion, with the aim of achieving similar
ultimate production levels at a lower capital intensity. While this progressive expansion would also allow
for the treatment of fresh and oxide o re, its installed capacity could be leveraged and maxi mized with
additional oxide ore sources, as well as high-grade transitional ore in the medium to longer-term.
As such, although Sadiola showcases a long mine life underpinned by an impressive inventory of nearly
10 million ounces in Measured and Indicated Mineral Resources (3), and nearly seven million ounces in
Mineral Reserves, its exploration strategy can materially improve its production profile, cash flows,
optionality and value creation, leveraging its ongoing expansion plan.
Technical Discussion
The Sadiola Mine is a long-life mine that has produced approximately 8.8 million ounces of gold(1) primarily
from oxide gold mineralization. Current end of year 2024 Reserves total approximately 7 million ounces
of gold in 149.7 million tonnes grading 1.45 g/t Au. Mineral Resources, inclusive of reserves comprises
Measured and Indicated Mineral Resources of 10 million ounces grading 1.46 g/t Au and Inferred Mineral
Resources of 496,000 ounces grading 1.08 g/t Au. Most, if not all mineralized zones are open either or
both along strike and to depth with high expectations that additional zones will be discovered.
Since January 1, 2025 , Allied Gold’s exploration, comprising 700 holes totaling 60,496 m of drilling
(including sterilization drilling), has focused on targeting oxide gold mineralization with a lesser emphasis
on fresh-rock-hosted gold mineralization. Significant amounts of oxide and fresh rock gold mineralization
have been intersected at the Tambali, Sekekoto/S12 Trend, FE2 Trend and FE4 zones (see Figure 1 for
locations). This ongoing work highlights Allied's commitment to creating long-term value through focused
and sustained exploration.
The Sadiola property overlies a regionally distinct part of the Western Malian Gold belt where there are
more carbonates attesting to a regionally unique original basin architecture. A strong westward rotation
of the Senegal-Mali Shear Zone, at the south end of the property, perhaps enhanced by the early basin
architecture also created a low-pressure zone that supported the emplacement of felsic to intermediate
intrusions and associated higher heat flow and shear zones. Structurally-hosted gold mineralization occurs
in all rock types with a preference to the carbonate -clastic contact and in intrusions. Each of the Sadiola
Main, Tambali, Sekekoto, FE2.5 and FE4 Zones lie along a limestone-clastic sediment contact that has been
fold-repeated up to seven times across the Sadiola Property. This contact has been the focus of shearing,
faulting, local carbonate dissolution and gold -bearing mineralization. Silicification, sulphidation (pyrite,
arsenopyrite and stibnite), potassic (biotite) and skarns (Sadiola Main D eposit) are the dominant
alteration types. The result is a world class series of gold deposits that will not be fully defined for quite a
few years if ever.
The following sections provide additional details for the primary target areas including figures that present
context and select drill hole intercepts, greater than 10 g/t Au x metres, from unmined areas. Thus, some
hole assay summaries may not contain all drill hole intercepts for that respective hole.
- 7 -
Sadiola Main
The Sadiola Main deposit, including a group of smaller northeast -trending deposits, has been traced for
2,500 m along strike, up to 200 m across strike ( Figures 1 and 2), to approximately 800 m depth and
remains open at depth. The oxidized portions of the deposit have been mined down to 200 m to 220 m
below surface. Mining of the remaining oxide and transition facies mineralization is ongoing. A type
section through the middle of the deposit (Figure 3) shows the strong gold grades over good widths along
the central part of the zone extending to below the area tested by drilling and numerous, secondary
mineralized structures.
Drilling recently resumed testing the Sadiola Main deposit with goals of:
• better defining the numerous mineralized sub -structures within the reserve pit envelope to
further reduce waste-to-ore ratios,
• extend oxide gold zones, especially where the northeast-trending Tambali zones would intersect
the Sadiola Main deposit, and
• further trace the deposit to the south and at depth, to provide support for extending the Sadiola
Pit to the south perhaps eventually linking up the Tambali Pit with the Sadiola pit.
Tambali
The 2,200 m by 500 m Tambali deposit lies approximately 600 m southwest of the Sadiola Main Deposit
(see Figure 1). Its western extent is controlled by a graphitic unit which lies at a north-northwest trending,
limestone-clastic sediment contact. Multiple corridors of northeast -trending intrusion - to sediment -
hosted gold mineralization that extend towards the Sadiola Main open pit may be correlated to the
northeast trending zones in the Sadiola Main Pit. The upper, oxide gold mineralization portion of the
deposit was mined until 2023 with production of approximately 403,000 ounces of gold(1). Historic drilling
indicates that the oxide gold mineralization is open to the north and in local areas within the pit. Over the
last couple of years, Allied has carried out several modest drill campaigns to test the fresh rock portions
of this deposit with dual goals of defining n ear surface fresh rock mineral resources which could be
processed in the Sadiola mill as needed and testing for additional oxide gold mineralization.
Since January 2025, Allied has completed 44 holes totaling 12,005 m of drilling (Figure 4), dominantly to
further define the northeast -trending mineralized structures. Gold -bearing mineralization dominantly
occurs in numerous discrete cross-cutting structures and along bedding planes along the entire strike
length of the deposit with the deepest intercepts to a maximum of approximately 400 m below surface.
It is likely that the mineralized trend continues to the north and to the northeast, towards the Sadiola
Main Deposit and is open to depth. Allied drilling has intersected multiple mineralized structures with
intercepts to 18.9 m @ 12.6 g/t Au in hole SADD 181 and 31.2 m @ 2.84 g/t Au in SADD138. Mineralization
is hosted by felsic and mafic dykes and in the clastic sediments. Modelling of these multiple zones of gold
mineralization is ongoing. A type-section of the deposit with select drill intercepts displayed is presented
in Figure 5.
- 8 -
Figure 2: Sadiola Main Deposit Geology and Drill Plan
A A’