File: '\\swfile\EmailIn\20260503 224259 Attachment RCT2026.05.04_update (final).docx'

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TSX Venture: RCT

Frankfurt: R5I

Suite 1305-1090 W. Georgia St., Vancouver, BC, V6E 3V7 t Phone: 604.685.9316t Fax: 604.683.1585

News Release

ROCHESTER REPORTS STRONG QUARTERLY RESULTS FOLLOWING

SUCCESSFUL PLANT UPGRADE PROGRAM

Vancouver, British Columbia - May 4 , 2026: - Rochester Resources Ltd. (the "Company" or "Rochester") (TSXV: RCT) today reports on its operating results for the quarter ended February 28th 2026.

Background and Context

The Company has operated in Nayarit since 2006, producing gold and silver from mineralized material. Historically, the significant manganese content of the mineralized material negatively impacted silver recovery. The unrecovered silver is in the Company's tailings impoundment.

The Company has conducted mining operations without a defined mineral resource, and the production decision was not based on a feasibility study of mineral reserves that has demonstrated technical or economic viability.

As previously disclosed the Company undertook a systematic program of laboratory testing in partnership with the University of Guanajuato, a leading mining and metallurgy institution in Mexico, to develop a solution to the manganese problem. A solution was developed and the Company proceeded to design, engineer, and construct a dedicated addition to the plant to implement the new solution . The work was completed and operations incorporating the solution commenced operations in Q1 2025.

Operational Results

The results have been positive with recovery for silver recoveries improving markedly.

Combined with improved precious metal prices, the enhanced recovery rates have materially strengthened the Company's economics through 2025 and into early 2026. Proceeds from operations have been reinvested into further improvements to both the plant and the mines, including a broad program of capacity expansion and equipment rehabilitation.

Plant and Process Upgrades

The reinvestment program has covered all areas of the Company's mill across the crushing, grinding, filtration, and proprietary process circuits:

Circuit

Upgrades Completed

Crushing

Revamping of secondary and tertiary crushers

Grinding

Replacement of 5' * 6' ball mill with a larger 6' * 6' unit and corresponding slurry pump upgrade

Filtration

Construction of two new Butter filters; full rehabilitation of existing drum filters

Proprietary Process

Installation of two reagent tanks with stainless-steel piping and pumps; large pre-treatment tank with proprietary propeller design; acidity/basicity control tank; high-speed centrifugal decanter for liquid-solid separation

Financial Results

The plant investments have translated directly into a significant improvement in financial performance. For the three months ended February 28, 2026, the Company recorded revenue of $8,419,953, more than double the $3,134,337 reported in the same quarter of the prior year, driven by the higher silver recovery rates and improved metal prices. The Company generated operating income of $2,304,451, compared to an operating loss of $404,320 in Q3 2025, and net income of $971,745, compared to a net loss of $2,091,491 in the prior-year quarter.

For the nine months ended February 28, 2026, revenue totaled $18,600,895, compared to $9,725,621 for the same period in 2025. Operating income for the nine-month period was $3,487,522, compared to an operating loss of $1,212,957 in the prior year.

Selected Financial Highlights (CAD$)

Q3 2026

Q3 2025

Change

Three Months Ended February 28

Revenue

$8,419,953

$3,134,337

+169%

Operating Income (Loss)

$2,304,451

$(404,320)

Swing of $2.7M

Net Income (Loss)

$971,745

$(2,091,491)

Swing of $3.1M

EPS - Basic & Diluted

$0.02

$(0.04)

+$0.06

Nine Months Ended February 28

Revenue

$18,600,895

$9,725,621

+91%

Operating Income (Loss)

$3,487,522

$(1,212,957)

Swing of $4.7M

Net Loss

$(781,661)

$(1,877,375)

Improvement of 58%

All figures are unaudited and expressed in Canadian dollars. The Company's complete interim financial statements are available on SEDAR+.

Outlook

The Company is focused on expanding throughput capacity. Management expects that when all the work is completed the plant will be capable of processing up to 400 tonnes per day. Given current metal price environment this increase once achieved will have positive impact on operating results.

ON BEHALF OF THE BOARD

"Nick DeMare"

CEO and Director

Tel: 604.685.9316

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

File: Attachment RCT2026.05.04_update (final).pdf

TSX Venture: RCT Frankfurt: R5I

Suite 1305-1090 W. Georgia St., Vancouver, BC, V6E 3V7 Phone: 604.685.9316 Fax: 604.683.1585

News Release

ROCHESTER REPORTS STRONG QUARTERLY RESULTS FOLLOWING SUCCESSFUL PLANT UPGRADE PROGRAM

Vancouver, British Columbia May 4 , 2026: - Rochester Resources Ltd. (the "Company" or "Rochester") (TSXV: RCT) today reports on its operating results for the quarter ended February 28th 2026.

Background and Context

The Company has operated in Nayarit since 2006, producing gold and silver from mineralized material. Historically, the significant manganese content of the mineralized material negatively impacted silver recovery. The unrecovered silver is in the Company's tailings impoundment.

The Company has conducted mining operations without a defined mineral resource, and the production decision was not based on a feasibility study of mineral reserves that has demonstrated technical or economic viability.

As previously disclosed the Company undertook a systematic program of laboratory testing in partnership with the University of Guanajuato, a leading mining and metallurgy institution in Mexico, to develop a solution to the manganese problem. A solution was developed and the Company proceeded to design, engineer, and construct a dedicated addition to the plant to implement the new solution . The work was completed and operations incorporating the solution commenced operations in Q1 2025.

Operational Results

The results have been positive with recovery for silver recoveries improving markedly.

Combined with improved precious metal prices, the enhanced recovery rates have materially strengthened the Company's economics through 2025 and into early 2026. Proceeds from operations have been reinvested into further improvements to both the plant and the mines, including a broad program of capacity expansion and equipment rehabilitation.

Plant and Process Upgrades

The reinvestment program has covered all areas of the Company's mill across the crushing, grinding, filtration, and proprietary process circuits:

Circuit Upgrades Completed Crushing Grinding Revamping of secondary and tertiary crushers Replacement of 5' * 6' ball mill with a larger 6' * 6' unit and corresponding slurry pump Filtration upgrade Proprietary Process Construction of two new Butter filters; full rehabilitation of existing drum filters Installation of two reagent tanks with stainless-steel piping and pumps; large pre- treatment tank with proprietary propeller design; acidity/basicity control tank; high- speed centrifugal decanter for liquid-solid separation - 2 -

Financial Results

The plant investments have translated directly into a significant improvement in financial performance. For the three months ended February 28, 2026, the Company recorded revenue of $8,419,953, more than double the $3,134,337 reported in the same quarter of the prior year, driven by the higher silver recovery rates and improved metal prices. The Company generated operating income of $2,304,451, compared to an operating loss of $404,320 in Q3 2025, and net income of $971,745, compared to a net loss of $2,091,491 in the prior-year quarter.

For the nine months ended February 28, 2026, revenue totaled $18,600,895, compared to $9,725,621 for the same period in 2025. Operating income for the nine-month period was $3,487,522, compared to an operating loss of $1,212,957 in the prior year.

Selected Financial Highlights (CAD$) Q3 2026 Q3 2025 Change

Three Months Ended February 28

Revenue $8,419,953 $3,134,337 +169%

Operating Income (Loss) $2,304,451 $(404,320) Swing of $2.7M

Net Income (Loss) $971,745 $(2,091,491) Swing of $3.1M

EPS Basic & Diluted $0.02 $(0.04) +$0.06

Nine Months Ended February 28

Revenue $18,600,895 $9,725,621 +91%

Operating Income (Loss) $3,487,522 $(1,212,957) Swing of $4.7M

Net Loss $(781,661) $(1,877,375) Improvement of 58%

All figures are unaudited and expressed in Canadian dollars. The Company's complete interim financial statements are available

on SEDAR+.

Outlook

The Company is focused on expanding throughput capacity. Management expects that when all the work is completed the plant will be capable of processing up to 400 tonnes per day. Given current metal price environment this increase once achieved will have positive impact on operating results.

ON BEHALF OF THE BOARD

"Nick DeMare" CEO and Director Tel: 604.685.9316

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.