Commentary & Deal Flow

Atlantica announces early tender results for its green senior secured notes due 2028

November 18, 2025 - Atlantica Sustainable Infrastructure Ltd (“Atlantica” or the “Company”) announced today the early tender results of the previously announced tender offer (the “Tender Offer”) to purchase for cash up to $85 million in aggregate principal amount of its outstanding $400 million aggregate principal amount of its 4.125% Green Senior Secured Notes due 2028 (CUSIP Nos.: 04916WAA2 (144A) / G0751NAB9 (Reg S) / ISIN Nos.: US04916WAA27 (144A) / USG0751NAB94 (Reg S)) (the “Notes”) (such amount, the “Tender Cap”). The Tender Offer is being made pursuant to the terms of an offer to purchase dated November 3, 2025 (as may be amended or supplemented from time to time, the “Offer to Purchase”), and is subject to certain conditions, including the Financing Condition, as described therein.

Details of the Tender Offer

The Company has been advised by Global Bondholder Services Corporation, as information agent and tender agent, that as of 5:00 p.m., New York City time, on November 17, 2025 (“Early Tender Deadline”), $335,501,000 aggregate principal amount of Notes, representing approximately 84% of the outstanding Notes, had been validly tendered and not validly withdrawn. Subject to the terms and conditions of the Tender Offer described in the Offer to Purchase, the Company intends to accept for purchase $85 million aggregate principal amount of the Notes validly tendered (and not validly withdrawn) at or prior to the Early Tender Deadline.

The consideration for each $1,000 principal amount of Notes validly tendered (and not validly withdrawn) at or prior to the Early Tender Deadline and accepted for purchase pursuant to the Tender Offer (the “Early Tender Notes”) will be $990 (the “Total Consideration”). The Total Consideration includes an early tender payment equal to $50 per $1,000 principal amount of Notes. Holders of Notes (“Holders”) whose Notes are accepted for purchase in the Tender Offer will also receive accrued and unpaid interest on such Notes from the last interest payment date to, but not including, the applicable settlement date. The Company expects the settlement date with respect to the Early Tender Notes to be November 19, 2025.

In accordance with the terms of the Tender Offer, the withdrawal time of 5:00 p.m., New York City time, on November 17, 2025, has now passed. Accordingly, Notes validly tendered in the Tender Offer may not be withdrawn, except in limited circumstances where required by law. Although the Tender Offer is scheduled to expire at 5:00 p.m., New York City time, on December 3, 2025, because the Tender Cap has been reached in respect of tenders of Notes made at or prior to the Early Tender Deadline, Atlantica does not expect to accept for purchase any Notes tendered after the Early Tender Deadline.

Parties & Contacts

Barclays Capital Inc. is acting as the dealer manager for the Tender Offer and can be contacted with questions regarding the Tender Offer at the following telephone numbers and email addresses:

Barclays Capital Inc.

745 Seventh Avenue, 5th Floor

New York, New York 100019

Attention: Liability Management Group

Collect: +1 (212) 528-7581

Toll Free: +1 (800) 438-3242

Email: us.lm@barclays.com

Copies of the Offer to Purchase are available to Holders from Global Bondholder Services Corporation, the information agent and the tender agent for the Tender Offer. Requests for copies of the Offer to Purchase should be directed to:

Global Bondholder Services Corporation

By Mail, Overnight Courier or Hand Delivery:

65 Broadway, Suite 404

New York, NY 10006

Attn: Corporate Action

Email: contact@gbsc-usa.com

Banks and Brokers Call Collect: +1 (212) 430-3774

All Others, Call Toll Free: +1 (855) 654-2015

About Atlantica

Atlantica Sustainable Infrastructure Ltd. is a sustainable infrastructure company that owns a diversified portfolio of contracted renewable energy, storage, efficient natural gas, electric transmission, and water assets in North America, Europe, and South America (www.atlantica.com).