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Sigma Lithium Announces Full Year 2025 Results: US$31M Cash Flow and 47% Cash Margin in 4Q25; Signed US$146M in Two Offtake Agreements

Mine Development & Operations Financials Partnerships & JV

Sigma Lithium Announces Full Year 2025

Results: US$31M Cash Flow and 47% Cash

Margin in 4Q25; Signed US$146M in Two

Offtake Agreements

HIGHLIGHTS

Strong cash generation: cash from operations in 4Q25 of US$31 million, cash inflows in

1Q26 of US$35 million and expected cash inflows in 2Q26 of US$96 million.

Signed two offtake agreements to supply high grade premium lithium oxide concentrate:

US$96M for 70,500t to be delivered in 2026

US$50M for 40,000t per year for three years for delivery starting in 2026

Successful commercial strategy - achieved net sales revenues of approximately US$67

million in 4Q25 and 1Q26, including:

Sales of high purity lithium fines of approximately 650,000 tonnes

Sales of high-grade premium lithium oxide concentrate of approximately 5,000

tonnes

Operating cash margin of 47% in 4Q25, showing financial discipline.

Deleveraged balance sheet and repaid debt: in 2025 cut trade finance debt by 60% and

total debt by 35%.

Restructured mining operations, successfully transitioning from outside contractor to

operational control, achieving efficiency gains and cost optimization.

Conference Call Information

The Company will hold a conference call

to

discuss its financial results for the second quarter of 2025 at

7:30a.m. ET on Monday, March 30, 2026. Register for the call at

https://ir.sigmalithiumcorp.com/events

.

São Paulo, Brazil--(Newsfile Corp. - March 30, 2026) - Sigma Lithium Corporation (NASDAQ: SGML)

(TSXV: SGML) (BVMF: S2GM34) ("Sigma Lithium" or the "Company"),

the largest producer of lithium

oxide concentrate in the Americas¹ and dedicated to industrializing socially and environmentally

sustainable lithium materials to supply global producers of batteries for energy security, announces the

Company's results for the three months and the twelve months ended December 31, 2025 and provides

an update on recent developments.

(1)

USGS.

STRONG CASH GENERATION

In 4Q25, the Company generated cash from operations of US$31 million, comprising inflows of US$41

million

less cash operating costs of US$10 million. At the end of 4Q25, the Company's had cash and

cash equivalents of US$6.2 million, which was up slightly from US$6.1 million at the end of 3Q25, as the

company used a substantial amount of the cash generated for debt repayment.

In 1Q26, cash inflows were US$35 million, primarily from sales of high-purity lithium oxide fines, and

cash and equivalents as of March 30, 2026 were US$12 million. In 2Q26, Sigma Lithium's expected

cash inflows are US$96 million, including US$83 million from the Company's two offtake agreements

and US$14 million in proceeds from sales of high-purity lithium oxide fines made in 1Q26.

SIGNED TWO SIGNIFICANT OFFTAKE AGREEMENTS

The Company signed two offtake agreements to supply high grade premium lithium oxide concentrate: a

prepayment of US$96 million for 70,500 tonnes during 2026, which was previously announced, and

another for the prepayment of US$50 million to supply 40,000 tonnes per year for three years

commencing in 2026.

The agreement that provides for the supply of 70,500 tonnes of high grade lithium oxide concentrate is to

be fulfilled during 2026 with disbursements of US$8 million per month (for a total US$96 million) and is

designed to

support the company's working capital requirements.

Both agreements include flexibility

regarding the timing of delivery of the product, which will enable the Company to continue to execute its

successful commercial strategy and fully benefit from lithium market seasonality.

EXECUTED A SUCCESSFUL COMMERCIAL STRATEGY

In 4Q25 and 1Q26, Sigma Lithium achieved net sales revenues of approximately US$67 million with

sales of about 650,000 tonnes of high purity lithium fines and approximately 5,000 tonnes of high-grade

premium lithium oxide concentrate, marking a restart of sales of Sigma Lithium's main product following

the remobilization of the Company's mine operations. The Company's mine operations were

demobilized at the beginning of October 2025 for a restructuring and remobilized at the end of January

2026. Net sales revenues also included approximately US$14 million in product final price adjustments.

HIGH OPERATING CASH MARGIN SHOWS FINANCIAL DISCIPLINE

In 4Q25, Sigma Lithium's operating cash margin was 47%, with a decline in operating costs of 77% on a

year-over-year basis more than offsetting a drop in net sales revenues of 64%. This performance

demonstrates the Company's ability to reduce costs and underscores Sigma Lithium's financial

resilience.

DELEVERED BALANCE SHEET AND REPAID DEBT

In 2025, Sigma Lithium continued to deleverage its balance sheet. Trade finance debt was cut by 60%

from 2024 and total debt declined by 35%. The Company continued to reduce trade finance debt in

1Q26, when it was reduced by 21% from 4Q25 to US$19 million. Total debt at year-end 2025 stood at

US$141 million, including a US$100 million loan that Sigma Lithium expects to pay down in 2026 using

the proceeds of offtake agreements and anticipated strong cashflow generation.

GUIDANCE FOR PRODUCTION VOLUMES AND COST PER TONNE

In the next twelve-month period, Sigma lithium expects to produce 240,000 tonnes of high grade

premium lithium oxide concentrate at an all-in sustaining cost of US$592 per tonne.

Production Volumes and Costs per Tonne (US$/t)

Estimated

12 Month Period (Phase 1)

Estimated FY2027E

(Phases 1 & 2)

Estimated FY2028E

(Phases 1, 2 & 3)

Production Volumes

240,000

520,000

770,000

CIF China Cash Cost

(440)

(440)

(440)

Maintenance Capex + Other Expenses

(12)

(12)

(12)

ESG, G&A Expenses

(80)

(32)

(16)

Interest Expenses

(60)

(27)

(27)

All-In Sustaining Cost

(592)

(511)

(495)

Cash Flow Forecasts at Various Realized Lithium Prices (US$ M)*

Cash Flow @ US$1,500/t

$158

$384

$581

Cash Flow @ US$1,800/t

$218

$514

$774

Cash Flow @ US$2,000/t

$258

$601

$902

*Prices used to calculate cash flow are grade adjusted.

ABOUT SIGMA LITHIUM

Sigma Lithium Corporation (NASDAQ: SGML) (TSXV: SGML) (BVMF: S2GM34) ("Sigma Lithium" or

"the Company"), is the largest producer of lithium oxide concentrate in the Americas¹ and dedicated to

industrializing socially and environmentally sustainable lithium materials to supply global producers of

batteries for energy security.

The Company operates one of the world's largest lithium production sites-the fifth-largest industrial-

mineral complex for lithium oxide concentrate-at its Grota do Cirilo operation in Brazil. Sigma Lithium is

at the forefront of environmental and social sustainability in the electric battery materials supply chain.

The Company's Greentech Industrial Plant combines dry stacking, the reuse of 100% of water, zero use

of toxic chemicals and the use of 100% renewable electricity. For more than two years Sigma Lithium

has not experienced an accident with lost time.

Sigma Lithium currently has a nameplate capacity to produce 270,000 tonnes of lithium oxide

concentrate on an annualized basis (approximately 38,000-40,000 tonnes of LCE) at its mine and state-

of-the-art Greentech Industrial Plant. The Company has initiated a Phase 2 expansion designed to close

to double production capacity to 520,000 tonnes. For more information about Sigma Lithium, visit our

website

.

(1)

USGS.

FOR ADDITIONAL INFORMATION PLEASE CONTACT

Anna Hartley

, Vice President of Global Banking and Investor Relations

[email protected]

+44 7866 458 093

Mariana Bengtson

, Investor Relations Manager

[email protected]

+55 11 9 2144 2750

Sigma Lithium

LinkedIn:

Sigma Lithium

Instagram:

@sigmalithium

X:

@SigmaLithium

FORWARD-LOOKING STATEMENTS

This news release includes certain "forward-looking information" under applicable Canadian and U.S.

securities legislation, including but not limited to statements relating to timing and costs related to the

general business and operational outlook of the Company, the environmental footprint of tailings and

positive ecosystem impact relating thereto, donation and upcycling of tailings, timing and quantities

relating to tailings and Green Lithium, achievements and projections relating to the Zero Tailings

strategy, achievement of ramp-up volumes, production estimates and the operational status of the

Grota do Cirilo Project, and other forward-looking information. All statements that address future

plans, activities, events, estimates, expectations or developments that the Company believes,

expects or anticipates will or may occur is forward-looking information, including statements regarding

the potential development of mineral resources and mineral reserves which may or may not occur.

Forward-looking information contained herein is based on certain assumptions regarding, among

other things: general economic and political conditions; the stable and supportive legislative,

regulatory and community environment in Brazil; demand for lithium, including that such demand is

supported by growth in the electric vehicle market; the Company's market position and future financial

and operating performance; the Company's estimates of mineral resources and mineral reserves,

including whether mineral resources will ever be developed into mineral reserves; and the Company's

ability to operate its mineral projects including that the Company will not experience any materials or

equipment shortages, any labor or service provider outages or delays or any technical issues.

Although management believes that the assumptions and expectations reflected in the forward-

looking information are reasonable, there can be no assurance that these assumptions and

expectations will prove to be correct. Forward-looking information inherently involves and is subject to

risks and uncertainties, including but not limited to that the market prices for lithium may not remain at

current levels; and the market for electric vehicles and other large format batteries currently has

limited market share and no assurances can be given for the rate at which this market will develop, if

at all, which could affect the success of the Company and its ability to develop lithium operations.

There can be no assurance that such statements will prove to be accurate, as actual results and future

events could differ materially from those anticipated in such statements. Accordingly, readers should

not place undue reliance on forward-looking information. The Company disclaims any intention or

obligation to update or revise any forward-looking information, whether because of new information,

future events or otherwise, except as required by law. For more information on the risks, uncertainties

and assumptions that could cause our actual results to differ from current expectations, please refer to

the current annual information form of the Company and other public filings available under the

Company's profile at

www.sedarplus.ca

.

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 news release.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/290434