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Completion of Gochager Lake Summer 2025 Field Program

Exploration Programs

FATHOM ANNOUNCES COMPLETION OF THE GOCHAGER LAKE SUMMER FIELD

EXPLORATION PROGRAM AND FURTHER “FOOTPRINT” EXPANSION ALONG STRIKE

Calgary, Alberta – August 18, 2025; Fathom Nickel Inc. (CSE: FNI) (FSE: 6Q5) (OTCQB: FNICF) (the

"Company" or " Fathom") is pleased to announce the completion of the summer field exploration

program at the Gochager Lake Project.

The Gochager Lake Project Summer Field Program (the “Program”) Highlights:

• 2,926 B-horizon soil samples were collected from 3,183 designated sites.

• 337 rock samples, consisting of both chip samples and grab samples were collected from

various outcrop locations.

• All 337 samples were analysed on- site by pXRF for nickel -copper-cobalt-sulphur and key

mafic-ultramafic rock pathfinder elements (chrome and magnesium).

• Multiple well-mineralized samples have been submitted for multi-element assay along with

a select number of samples for whole rock geochemical analysis.

• Unfortunately, due to a lightning-induced wildfire in the Gochager Lake area, the field crew

was evacuated, and the Program was cut short by three days. Despite the truncated

program, the crew was able to complete approximately 90% of the intended soil

geochemistry sampling coverage.

The Program summary is presented in Figures 1 & 2.

• Figure 1 illustrates the extension of the soil geochemistry along strike to the northeas t and

southwest of the area where the 2024 soil geochemistry survey was performed.

o The 2025 program has added approximately 3.5km of coverage to the northeast and

approximately 2.5km of coverage to the southwest.

o Note: the areas to the southwest that are not highlighted in grey, are the areas where

crews were unable to complete their work due to the encroaching wildfire.

o The area now covered by B -horizon soil geochemistry (from 2024 and 2025) totals

approximately 9km in strike and 1 -3km in width . To date , the soil geochemistry

coverage has been focused within the interpreted structural corridor highlighted in

Figures 1 and 2.

• Figure 2 illustrates chip sample locations and 3 notable polygons where pXRF analysis

detected anomalous to very anomalous nickel in sulphide mineralization within

metasedimentary, gabbroic and ultramafic rock.

o Nickel (Ni ) in disseminated sulphide mineralization in an ultramafic host was

detected approximately 1,200m along strike of the historic Gochager Lake deposit.

o Multiple locations of Ni in disseminated sulphide mineralization, in gabbroic rock

was detected approximately 400-500m along strike of the historic Gochager Lake

deposit.

o Note variable texture gabbro with Ni occurring in disseminated sulphide

mineralization is the host rock at the historic Gochager Lake deposit. Furthermore,

Fathom recognizes Ni in disseminated sulphide mineralization in ultramafic rock

(pyroxenite) occurring immediately north of the historic Gochager Lake deposit.

o Elevated Ni in disseminated to semi -massive sulphide mineralization within a

metasediment host was detected approximately 800m west -southwest of the

historic Gochager Lake deposit. It is within this area that the highest Ni-in soil sample

was collected (Fathom Press Release July 21, 2025).

o The historic Gochager Lake deposit area geology map will be updated once all

analyses have been received and interpreted.

o We anticipate the receipt of all soil and rock geochemistry results by mid-September.

In acknowledging the efforts of the team in response to the wildfires, Ian Fraser, Fathom CEO and

VP Exploration stated, “ Firstly, I would like to thank the crew at TerraLogic Exploration Inc. for an

excellent job done under extremely challenging circumstances. I must also acknowledge the

leadership teams at both TerraLogic and Osprey Wings Ltd. for their swift action in ensuring a safe

and complete evacuation of the Gochager Lake camp. I must also thank the team at JP Enterprises

Inc. for their efforts in manning the pumps and sprinkler system at our camp. It has been a very

challenging exploration season due to wildfires burning in our project area and we are very grateful

that the crew was extracted safely and further commend the efforts of those individuals who

remained in camp and ultimately saved our newly constructed 20-25 person all season camp.”

He went on to comment on the exploration program and the future plans at Gochager Lake, “We

look forward to interpreting the results of the soil and rock geochemistry program once assays are

in hand in September . It is obvious from preliminary rock geochemistry that mineralized gabbro

continues for a minimum of 500m along strike of the historic Gochager Lake deposit . We were

delighted and very encouraged with the discovery of a mineralized ultramafic outcrop further along

strike and on the other side of the lake from the known mineralized gabbro occurrences. We look

forward to completing a geophysical survey to determine the conductivity associated with the

newly discovered mineralized gabbro and ultramafic rock and to specifically determine if there is

a conductor(s) below the small lake. Once we have all results in hand we will be in a better position

to discuss the robust multi -element in-soil anomalies that flank the boundar ies of the interpreted

structural corridor and to determine the next exploration steps as we further define this burgeoning

nickel camp in north central Saskatchewan. ”

Quality Assurance / Quality Control (QA/QC) Disclosure Statement

The Company contracted the services of TerraLogic Exploration Inc. (“TerraLogic”) to conduct its soil

and rock geochemistry program within the historic Gochager Lake deposit area. Soil samples were

collected using either a hand auger or a geotool at pre-determined sites utilizing a 50m x 50m sample

spacing configuration. B-horizon soil samples were collected at each site, placed in kraft soil sample

bags and all metadata associated with each sample location was recorded. Once sorted and

logged, samples were shipped to ALS Canada Ltd. (“ALS”) in North Vancouver, British Columbia for

multi-element analyses. All rock samples collected for analyses, once logged and sorted, were also

sent to ALS for multi-element analyses.

As part of its ongoing exploration activities, Fathom is utilizing a portable Vanta ™ XRF Analyzer

(“pXRF”) to provide real -time lithogeochemical, multi-element data on surface rock chip samples

and rock grab samples collected in the field. The Vanta™ XRF Analyzer is a hand-held device, held in

position for a total 120 seconds - beam 1 (30 seconds), beam 2 (60 seconds) and beam 3 (30

seconds) to allow for an effective reading of elements occurring at that specific point, and at that

specific surface of a rock sample. All elements detected at that specific point; nickel, copper, cobalt

plus key pathfinder elements, chrome and magnesium, are recorded. The reader is cautioned that

pXRF data should be treated only as an indication of elements, as the accuracy of the beam position

on a particular element is variable.

Qualified Person and Data Verification

Ian Fraser, P.Geo., CEO, VP Exploration and a Director of the Company and the "qualified person" as

such term is defined by National Instrument 43 -101, has verified the data disclosed in this news

release, and has otherwise reviewed and approved the technical information in this news release on

behalf of the Company.

About Fathom Nickel Inc.

Fathom is an exploration company that is targeting magmatic nickel sulphide discoveries to

secure the supply of North American Critical Minerals and to support the global green energy

transition.

The Company now has a portfolio of three high -quality exploration projects located in the prolific

Trans Hudson Corridor in Saskatchewan: 1) The Albert Lake Project, a 90,000+ hectare project that

hosts the historic Rottenstone Mine 1. Fathom exploration to date at the Albert Lake project

confirms: the Rottenstone deposit mineralization (Ni -Cu+Pd-Pt+Au ) extends to the south a

minimum 40m and remains open, and the potential for a footwall offset of the Rottenstone

deposit; a new Rottenstone -like (similar host rock and similar mineralization) discovery by drilling

500-550m W -NW of the historic mine; and similar Rottenstone -like host rock and mineralization

intersected by drilling approximately 1.5km S -SW of the historic mine. 2) The 34,000+ hectare

Gochager Lake Project that hosts the historic Gochager Lake deposit 2. Fathom exploration to date

at the Gochager Lake project confirms: the vertical extension of Ni -Cu-Co mineralization a

minimum of 150m below the interpreted historic deposit boundary, and very good potential

remains open for expansion in all directions; and multiple high -grade zones / chutes of vertically

oriented Ni -Cu-Co sulphide breccia mineralization occur within the historic deposit and remain

open for further expansion and delineation; and surface mapping and soil / rock geochemistry has

confirmed the Gochager Lake deposit host rock and mineralization style; the footprint, extends a

minimum 1,200m to the northeast and remains open for expansion along strike. 3) The 10,000+

hectare Friesen Lake Project located 40km southwest of the historic Rottenstone Mine and 30km

northwest of the historic Gochager Lake deposit. The Friesen Lake property hosts the Olsen Cu -

Ni-Pt Showing also referred to as the Friesen Lake Cu -Ni-Pt showing and is described as an

ultramafic dyke that historic trenching and drilling demonstrates Cu -Ni-Pt-Pd and Au

mineralization within the ultramafic dyke (Saskatchewan Mineral Deposit Index (SMID) #0928a).

To date Fathom has not performed any exploration at the Friesen Lake Project.

1 – The Rottenstone Mine; a small open- pit mining / milling operation in production 1965 -1969. Milling commenced

September 5, 1965, operated through November 7, 1965, and 5,500 short tons were mined and milled, the average

production grade being 3.23% Ni, 1.83% Cu, 0.14 oz/ton Pt, 0.10 oz/ton Pd, 0.03 oz/ton Au (9.26 g/t* 3E ) and 0.20 oz/ton

Ag for this period . Initial milling operations in 1965 produced 1,070 dry short tons of concentrates, the average grade

being: 10.835% Ni, 5.74% Cu, 0.33 oz/ton Pt, 0.53oz/ton Pd, 0.10 oz/ ton Au (32.91 g/t * 3E) and 1.25 oz/ton Ag. (Richards,

B.R. and Robinson, B.G.W. 1966), Mining and milling a small ore deposit …. Rottenstone Mining Limited: The Canadian

Mining and Metallurgical Bulleting for December 1966 . The Saskatchewan Mineral Deposit Index (SMDI) #0958 reports

final mine production in 1969 of 28,724 tons with an average grade of 3.28% Ni, 1.83% Cu and 9.63 g/t 3E (Pd-Pt+Au)

and that approximately 9,000 tons of concentrate were sold to the International Nickel Company of Canada Limited . * A

factor of 34.286 g/tonne was used to convert 1 oz/ton to g/tonne (g/t).

2 – The Gochager Lake property is host to the historic Gochager Lake Ni -Cu deposit. There is no source or available

Technical Reports to verify the historic resource estimate for the Gochager Lake deposit; hence, Fathom will treat the

Gochager Lake deposit historic estimate as an Exploration Target. Available records in the SMDI and Saskatchewan

Mineral Assessment Database (SMAD) suggest an E xploration Target of 4 -5 million tons grading 0.3% Ni – 0.4% Ni and

0.08% Cu – 0.09% Cu, containing a higher -grade core of 1.5 -2 million tons grading 0.6% NiEq – 0.7% NiEq (note NiEq is

based on Ni -Cu only). The ranges of tons and grade are conceptual as there is insufficient historic data to verify the

historical resource estimate (s) for the Gochager Lake deposit, and the higher -grade core. At present, Fathom has drilled

16 drillholes (5,549m) into the historic Gochager Lake deposit and has confirmed Ni-Cu grades comparable to and higher

than the historical grades reported, thus confirming that a deposit of Ni -Cu+Co metal a ccumulation does exist at the

historic Gochager Lake deposit / property. Furthermore, insufficient drilling has been done by the Company to define a

current mineral resource, and again at this time, it is uncertain if further drilling will result in the Exploration Target b eing

delineated as a mineral resource. The disclosed potential quantity and grade has been determined by historic recor ds

notably; t he Saskatchewan Mineral Deposit Index (SMDI #0880) reports delineation drilling outlined a deposit at the

historic Gochager Lake Deposit ; Steel, J.S. (1990) (SMAD 73P15- 0091) : Report on a Diamond Drilling Program on the

Gallagher (Gochager) Lake Property of McNickel Inc., reported that Scurry -Rainbow Oil Ltd. constructed vertical sections

and a longitudinal section from drill data collected 1966 -1968, and an orebody with reasonably well -defined limits was

interpreted. Ore reserves were then calculated for the Zone A. As stated above the historic estimate is not well documented

and there are no available Technical Reports to support the historic resource estimate(s).

ON BEHALF OF THE BOARD

“Ian Fraser”

CEO, VP Exploration , Director

For further information, please contact:

Ian Fraser, CEO, VP Exploration

1-403-650-9760

[email protected]

Or

Doug Porter, President and CFO

1-403-870-4349

[email protected]

Forward Looking Statements:

This news release contains "forward -looking statements" that are based on expectations, estimates, projections and

interpretations as at the date of this news release. Forward-looking statements are frequently characterized by words such

as "plan", "expect ", "project", "seek", "intend", "believe", "anticipate", "estimate", "suggest", "indicate" and other similar

words or statements that certain events or conditions "may" or "will" occur, and include, without limitation, statements

regarding payment of terms under the Option Agreement, permitting for the Property, receipt of an exploration permit,

timing of the exploration program on the Property and the Company achieving the earn -in thresholds under the Option

Agreement. Forward-looking statements relate to information that is based on assumptions of management, forecasts of

future results, and estimates of amounts not yet determinable. Any statements that express predictions, expectations,

beliefs, plans, projections, objectives, assumptions or future events or performance are not statements of historical fact

and may be "forward -looking statements." Forward-looking statements are subject to a variety of risks and uncertainties

which could cause actual events or results to differ from those reflected in the f orward-looking statements, including,

without limitation: risks related to failure to obtain adequate financing on a timely basis and on acceptable terms; risks

related to the outcome of legal proceedings; political and regulatory risks associated with min ing and exploration; risks

related to the maintenance of stock exchange listings; risks related to environmental regulation and liability; the potential

for delays in exploration or development activities or the completion of feasibility studies; the uncer tainty of profitability;

risks and uncertainties relating to the interpretation of drill results, the geology, grade and continuity of mineral deposit s;

risks related to the inherent uncertainty of production and cost estimates and the potential for unexpe cted costs and

expenses; results of prefeasibility and feasibility studies, and the possibility that future exploration, development or mining

results will not be consistent with the Company's expectations; risks related to commodity price fluctuations; an d other

risks and uncertainties related to the Company's prospects, properties and business detailed elsewhere in the Company's

disclosure record. Such forward looking statements involve known and unknown risks, uncertainties and other factors

which may ca use the actual results, performance or achievements of the Company to be materially different from any

future results, performance or achievements expressed or implied by such forward -looking statements. These forward -

looking statements are made as of the date hereof and the Company does not assume any obligation to update or revise

them to reflect new events or circumstances except in accordance with applicable securities laws. Actual events or results

could differ materially from the Company's expectations or projections.