Cadeler A/S

Transaction in Own Shares • May 26, 2025

Stock Exchange Announcement

CADELER A/S INITIATES SHARE BUY-BACK PROGRAMME OF UP TO NOK 22.5 MILLION (APPROXIMATELY EUR 1.9 MILLION)

Copenhagen, 26 May 2025: Cadeler A/S (OSE: CADLR / NYSE: CDLR) ("Cadeler") today announces the launch of a share buy-back programme of up to NOK 22.5 million (approx. EUR 1.9 million) (the "Programme"), pursuant to the authorisation for the acquisition treasury shares granted by Cadeler's shareholders to its Board of Directors at the company's general meeting held on April 22, 2025.

The Programme is to be implemented in accordance with Article 5 of Regulation (EU) no. 596/2014 of the European Parliament and of the Council of April 16, 2014, as amended (the "Market Abuse Regulation") and the Commission's Delegated Regulation (EU) 2016/1052 of March 8, 2016 (together with the Market Abuse Regulation, the "Safe Harbour Rules").

The purpose of the Programme is to enable Cadeler to meet its obligations to its employees arising from certain of Cadeler's share-based incentive programmes.

The Programme will be conducted in the period from 26 May 2025 until 6 June 2025, both days included, unless the maximum number of shares or repurchase amount under the Programme is earlier reached. Cadeler may, however, suspend or terminate the Programme at any time.

The following additional conditions apply to the Programme:

• The Programme will be managed by an independent lead manager on Cadeler's behalf. The independent lead manager will make its trading decisions regarding the timing of the share repurchases independently of, and without influence from, Cadeler.
• The maximum amount allocated to the Programme is NOK 22.5 million, corresponding to approximately EUR 1.9 million.
• The maximum number of shares that may be acquired under the Programme is 395,200 shares, each with a nominal value of DKK 1.00.
• Shares acquired under the Programme may not be purchased at a price exceeding the higher of (i) the share price of the last independent trade and (ii) the highest current independent purchase bid on the trading venue where the purchase is carried out.
• Purchases made on a single day may not exceed 25% of the average daily trading volume on the trading venue where the purchases are made, calculated based on the average daily traded volume during the 20 trading days preceding the date of purchase.

Information about any shares acquired under the Programme will be published no later than every seventh trading day on Cadeler's investor relations website, https://ir.cadeler.com, and by stock exchange announcements. Cadeler will similarly publish information about subsequent amendments to the Programme (if any), including any termination of the Programme.

For further information, please contact:

Mikkel Gleerup CEO, Cadeler +45 3246 3102 mikkel.gleerup@cadeler.com

Alexander Simmonds EVP & CLO, Cadeler +44 7376 174172 alexander.simmonds@cadeler.com

About Cadeler A/S:

Cadeler is a global leader in offshore wind installation, operations, and maintenance services. Cadeler is a pure play company, operating solely in the offshore wind industry with an uncompromising focus on safety and the environment. Cadeler owns and operates the industry's largest fleet of jack-up offshore wind installation vessels and has for more than 10 years been a key supplier in the development of offshore wind energy to power millions of households. Cadeler's fleet, expertise and capacity to handle the largest and most complex next-generation offshore wind installation projects positions the company to deliver exceptional services to the industry. Cadeler is committed to being at the forefront of sustainable wind farm installation and to enabling the global energy transition towards a future built on renewable energy. Cadeler is listed on the New York Stock Exchange (ticker: CDLR) and the Oslo Stock Exchange (ticker: CADLR).

To learn more, please visit www.cadeler.com.