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Irene Mainar Borao


Irene specializes in international debt and equity capital markets transactions (acting for underwriters and issuers), including public offerings, rights offerings, high yield, ESG bond issuances, secured bond issuances, US private placements and convertible bonds.


Representative matters

The initial purchasers in connection with Verisure Holdings AB (publ)’s refinancing of €1.05 billion comprised of a high yield €525,000,000 bond due 2030 and a concurrent €525,000,000 term loan B facility.

The initial purchasers in connection with Techem’s €2.7 billion high yield bond and loan refinancing, comprised of (i) a €500,000,000 bond issuance due 2029, (iii) a concurrent tender offer for the company’s existing €1.145 billion (iii) a satisfaction and discharge of the company’s existing notes remaining outstanding upon completion of the tender offer, and (iv) an extension and upsize of the company’s €1.8 billion term facility and €375,000,000 revolving credit facility.

Impact Investment Exchange Pte. Ltd. on the offering of $50 million aggregate principal amount under its Women’s Livelihood Bond™ (WLB) Series, the world’s first sustainable debt security in the market issued in compliance with the Orange Bond Principles™ and the first multi-continent bond in the Series.

The dealer manager in connection with the tender offer of ACWA Power Management and Investments One Limited, a subsidiary of ACWA Power Company, a Saudi listed joint stock company, in a pre-amortization aggregate principal amount up to $428,000,000, as amended, for purchase by the Company for cash of its outstanding 5.95% Senior Secured Bonds due 2039.

The underwriters in connection with ArcelorMittal’s $2.2 billion offering of its 2027 and 2032 fixed rate notes.

The lenders in connection with the financing in support of CVC Capital Partners' acquisition of RGI from Corsair.

The financing sources in connection with a consortium of investors in relation to their co-investment Atalanta B.C.

The initial purchasers in connection with T-Mobile Netherlands' €1.35 billion bond financing.

The initial purchasers in connection with Aggreko's £791 million (equivalent) senior secured notes offering by Albion Financing 1 S.à r.l. and Aggreko Holdings Inc. and $450 million senior notes offering by Albion Financing 2 S.à r.l.

The initial purchasers in connection with Sherwood Financing plc's offering of £1.2 billion (equivalent) senior secured notes for Arrow Global.

AEDAS Homes on the issuance of €360 million 4.00 per cent. senior secured notes due 2026.*

The Dealer Managers on the purchase by Abertis Infraestructuras S.A. of €920.4 million of its outstanding debt securities and a new issue by Abertis Infraestructuras Finance B.V. of €1.250 billion hybrid securities guaranteed by Abertis Infraestructuras, S.A.*

BBVA and the other Managers in connection with the inaugural stand-alone issue by Red Eléctrica Corporación, S.A. of €400 million 0.875 per cent. bonds due April 2020.*

Caixabank on the invitation to holders of the €1.00 billion Fixed Rate Reset Notes due 2026 and €300 million Tier 2 Subordinated Notes due 2027 and the issuance of €600 million Tier 2 Subordinated Fixed Reset Notes due 2028.*

BNP and the other Dealer Managers on the invitation by Inmobiliaria Colonial, SOCIMI, S.A. to holders of the €500 million 2.728 per cent. Notes due 2023 and the €600 million 1.45 per cent. Notes due 2024 to tender such notes for cash and the Managers in the issue of €500 million 1.350% Notes due October 2028.*

Bank of America and the other Initial Purchasers on the issue of €600 million 3.625% senior notes due 2024 by El Corte Ingles.*

Nomura on the inaugural issue of €1.00 billion 0.750 per cent. Senior Preferred Social Notes due 2025 by Banco Bilbao Vizcaya Argentaria, the first European issue of notes, the proceeds of which to be applied to allievating the effects of the Covid-19 pandemic.*

Advising the Issuers and Managers on the establishment and update of debt securities programmes for the issuance of senior (preferred and non-preferred) and subordinated debt securities (including the EMTN programmes of CAF, CaixaBank, BBVA, BCC, Enagás, ACS, Red Eléctrica, Criteria Caixa, Abertis, CEPSA, DIA, Inmobiliaria Colonial, Prosegur Cash, REN and HIT, amongst others) and issuances thereunder.*

Advising the Dealer Managers on the offer by Redexis Gas Finance B.V. to tender €650 million 2.75 per cent. Notes due 2021 for cash and the Dealers in the issuance of € 500 million 1.875 per cent. Notes due May 2025 unconditionally and irrevocably guaranteed by Redexis Gas, S.A.*

*Denotes prior firm experience



New York

England and Wales



University of Pennsylvania Law School LL.M.

University of Valencia, Bachelor of Law and Political Science


Spanish, English, German, French, Italian
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.