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Itafos and Gb Minerals Complete Plan of Arrangement

Mergers & Acquisitions

NEWS RELEASE

ITAFOS AND GB MINERALS COMPLETE PLAN OF ARRANGEMENT

February 27, 2018 – Itafos (TSX-V: IFOS) and GB Minerals Ltd. (“ GB Minerals ”) (TSX-V: GBL) are

pleased to announce today the completion of the previously announced plan of arrangement under the

Business Corporations Act (British Columbia) (the “Arrangement”), pursuant to which Itafos acquired all

of the issued and outstanding common shares of GB Minerals (the “ GB Minerals Shares ”) not already

owned directly or indirectly by Itafos in exchange for ordinary shares of Itafos (the “ Itafos Shares”) or a

combination of Itafos Shares and cash, as further de scribed below. As a result of the Arrangement, GB

Minerals has become an indirect and wholly owned subsidiary of Itafos.

Under the Arrangement, holders of GB Minerals Shares (the “ GB Minerals Shareholders ”), other than

Itafos and its affiliates, were able to elect to receive one of the following: (i) 0.035714 of an Itafos Share

for each GB Minerals Share held (the “ Share Option ”); or (ii) a combination of C$0.05 in cash and

0.011905 of an Itafos Share for each GB Minerals Share held (the “ Cash and Share Option ” and,

together with the Share Option, the “ Consideration”). GB Minerals Sharehol ders that did not make a

valid election to receive the Cash and Share Option pr ior to 5:00 p.m. (Toronto time) on February 22,

2018, the election deadline, are deemed to have elected to receive the Share Option. Outstanding

options to purchase GB Minerals Shares were ca ncelled in accordance with the terms of the

Arrangement.

All GB Minerals Shareholders will be pr ovided with the Consideration described above, depending on the

election or deemed election, as the case may be, made by such shareholde r. Of the 747,948,785 GB

Minerals Shares not already owned directly or indi rectly by Itafos, approximately 86.5% (647,255,464 GB

Minerals Shares) will receive t he Cash and Share Option and approx imately 13.5% (100,693,321 GB

Minerals Shares) will receive the Share Option. As a result, Itafo s will be paying C$32,362,773.20 and

issuing approximately 11,301,732 Itafos Shares to GB Minerals Shareholders pursuant to the

Arrangement.

Pursuant to the letter of transmittal and election mailed to registered GB Minerals Shareholders as part of

the materials in connection with the Meeting (as defi ned below), in order to receive the Itafos Shares to

which they are entitled, register ed GB Minerals Shareholders who have not already done so will be

required to deposit their share certificate(s) or di rect registration system advice(s) representing GB

Minerals Shares, together with the duly completed letter of transmittal and election, with TSX Trust

Company, the depositary under the Arrangement. GB Mi nerals Shareholders whose GB Minerals Shares

are registered in the name of a broker, dealer, bank , trust company or other nominee must contact their

nominee to deposit their GB Minerals Shares if they have not already done so.

The Arrangement was approved by securityholders of GB Minerals at a special meeting held on February

21, 2018 (the " Meeting"). The British Columbia Supreme Court issued a final order approving the

Arrangement on February 23, 2018. Th e GB Minerals Shares are expected to be de-listed from the TSX

Venture Exchange (the “TSX-V”) after the close of trading on or about February 28, 2018. An application

will also be made for GB Minerals to cease to be a reporting issuer in the applicable jurisdictions.

Immediately prior to the completion of the Arrang ement, Itafos, beneficially owned, or controlled or

directed, directly or indirectly 31.3% of the GB Minerals Shares. Itafos will file an updated early warning

report in connection with the co mpletion of the Arrangement. A copy of the report will be available under

GB Minerals’ profile at www.sedar.com.

ABOUT ITAFOS

Itafos is an integrated producer of phosphate fertilizers with an attractive portfolio of long-term strategic

assets. Itafos is managed by an experienced and diverse team with extensive commercial, financial, legal

and technical expertise. Itafos owns the Conda Ph osphate Operations, which produces approximately

540,000 tons per year of mono-ammonium phosph ate, super phosphoric acid, merchant grade

phosphoric acid and specialty products located in Idaho, United States and the Arraias Phosphate

Operations which produces approximately 500,000 tons per year of single super phosphate located in

central Brazil. Itafos’ development portfolio includes a number of additional projects in Brazil, including the

Santana Project, a high-grade phosphate mine project located in Pará State and the Araxá Project, a

high-grade rare earth elements, niobi um and phosphate mine project located in Minas Gerais State. In

addition, Itafos owns the Paris Hills Project, a high-grade phosphate mine project located in Idaho, United

States, the Mantaro Project, a high-grade phosphate mi ne project located in Junin, Peru and the Farim

Project, a high-grade phosphate mine project located in Farim, Guinea Bissau. Further information on

Itafos can be found at www.itafos.com.

ABOUT GB MINERALS LTD.

GB Minerals Ltd. is a Canadian mining exploratio n and development company focused on advancing its

Farim phosphate project located in Guinea-Bissau in West Africa, which consists of a high grade

sedimentary phosphate deposit of one continuous phosphate bed extending over a known surface area of

approximately 40 km2. Further information on GB Minerals can be found at www.gbminerals.com.

FORWARD LOOKING STATEMENTS

Certain information contained in this news release cons titutes forward looking information. All information

other than information of historical fact is forwar d looking information. The use of any of the words

“intend”, “anticipate”, “plan”, “continue”, “estimate”, “expect”, “may”, “will”, “project”, “should”, “would”,

“believe”, “predict” and “potential” and similar expressions are in tended to identify forward looking

information. This information involves known and un known risks, uncertainties and other factors that may

cause actual results or events to differ materially from those anticipated in such forward looking

information. No assurance can be given that this in formation will prove to be correct and such forward

looking information included in this news releas e should not be unduly relied upon. The forward looking

information provided in this news release is based upon a number of material factors and assumptions.

Forward looking information is subject to a number of risks and other factors that could cause actual

results and events to vary materially from that anticipated by such fo rward looking information. Readers

are cautioned that the foregoing lis t of risks, uncertainties and as sumptions are not exhaustive. The

forward looking information included in this news release is expressly qualified by this cautionary

statement and is made as of the date of this news release. Neither Itafos nor GB Minerals undertake any

obligation to publicly update or revise any forward looking information except as required by applicable

securities laws.

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

FURTHER INFORMATION

Itafos

Ugland House

Grand Cayman, Cayman Islands

KY1-1104

Brian Zatarain, Chief Executive Officer

[email protected]

www.itafos.com

GB Minerals Ltd.

1500 - 701 West Georgia Street

Vancouver, BC

V7Y 1C6

www.gbminerals.com