Cadeler (NYSE: CDLR) orders EUR 805M T-class offshore wind vessels

Rhea-AI Filing Summary

Cadeler A/S has signed firm contracts with COSCO Shipping Offshore shipyard in Qidong, China, for the construction of two new T-class offshore wind installation vessels, with deliveries scheduled in 2030 and 2031. The contract price for the two vessels is approximately EUR 805 million in aggregate, following equity financing secured earlier in the year as part of Cadeler’s long-term growth strategy.

The T-class series is described as the largest and most capable offshore wind installation vessels yet introduced to the market, incorporating new technologies and expanded operational capabilities aimed at handling increasingly complex projects. The orders build on Cadeler’s existing collaboration with COSCO Shipping Offshore, which has already constructed several vessels for the company. These vessels form part of Cadeler’s fleet expansion strategy to support the accelerating build-out of offshore wind, and the company is already in discussions with key clients regarding their future deployment.

Positive

• Cadeler commits to two new T-class vessels with an aggregate contract price of EUR 805 million, supporting long-term fleet expansion in offshore wind installation.
• The T-class vessels are engineered to be the largest and most capable in the offshore wind installation market, potentially enhancing Cadeler’s competitive positioning and ability to handle complex projects.

Negative

• The construction of two T-class vessels represents a large capital commitment of EUR 805 million, increasing Cadeler’s exposure to long-dated project execution and market-demand risks ahead of deliveries in 2030 and 2031.

Key Figures

T-class vessel contract value: EUR 805 million Number of T-class vessels ordered: 2 vessels First T-class vessel delivery year: 2030 +1 more

4 metrics

T-class vessel contract value EUR 805 million Aggregate contract price for two T-class offshore wind installation vessels

Number of T-class vessels ordered 2 vessels Firm contracts signed with COSCO Shipping Offshore shipyard

First T-class vessel delivery year 2030 Scheduled delivery of one T-class offshore wind installation vessel

Second T-class vessel delivery year 2031 Scheduled delivery of the second T-class offshore wind installation vessel

Key Terms

T-class offshore wind installation vessels, jack-up offshore wind installation vessels, pure-play offshore wind installation partner, full-scope foundation transport and installation

4 terms

T-class offshore wind installation vessels technical

"construction of two new T-class offshore wind installation vessels"

jack-up offshore wind installation vessels technical

"owns and operates the industry’s largest fleet of jack-up offshore wind"

pure-play offshore wind installation partner financial

"Cadeler A/S (Cadeler) is a pure-play offshore wind installation partner"

full-scope foundation transport and installation technical

"expanding its capabilities into full-scope foundation transport and installation"

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FAQ

What did Cadeler (CDLR) announce in its August 2026 Form 6-K?

Cadeler announced firm contracts with COSCO Shipping Offshore for two new T-class offshore wind installation vessels, with deliveries scheduled in 2030 and 2031, as part of its long-term fleet expansion strategy.

What is the contract value of Cadeler’s new T-class vessels?

The contract price for the two T-class offshore wind installation vessels is approximately EUR 805 million in aggregate. This reflects a significant long-term capital investment to expand Cadeler’s fleet and support future offshore wind projects.

Who is building Cadeler’s new T-class offshore wind vessels?

The two T-class vessels for Cadeler (CDLR) will be built by COSCO Shipping Offshore shipyard in Qidong, China. COSCO has already constructed several vessels for Cadeler under its existing newbuild programme, reinforcing their ongoing collaboration.

When will Cadeler’s new T-class vessels be delivered?

Cadeler expects delivery of the two T-class offshore wind installation vessels in 2030 and 2031. These long-dated deliveries align with anticipated future offshore wind demand and give time for securing deployment contracts with key clients.

How do the T-class vessels fit into Cadeler’s strategy?

The T-class vessels are part of Cadeler’s long-term fleet expansion strategy, targeting larger and more technically demanding offshore wind projects. They are designed to offer higher efficiency and capability, supporting the accelerating build-out of offshore wind globally.

Has Cadeler already financed the T-class vessel investment?

Cadeler states it secured equity financing earlier in the year for the T-class vessel investment. This financing supports the company’s strategy to grow its modern fleet and meet evolving offshore wind installation requirements.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-16 OR 15D-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For the month of August 2026

Commission File Number: 001-41889

CADELER A/S

(Translation of registrant's name into English)

Kalvebod Brygge 43

DK-1560 Copenhagen V, Denmark

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F o

Press Release

Copenhagen, 10 August 2026 – Cadeler today announces that it has signed firm contracts with COSCO Shipping Offshore shipyard in Qidong, China, for the construction of two new T-class offshore wind installation vessels, scheduled for delivery in 2030 and 2031.

Earlier this year, Cadeler secured the equity financing for this investment as part of its long-term strategy to become the preferred offshore wind installation partner and to support the continued growth of the offshore wind industry. The new T-class series vessels have been engineered to be the largest and most capable vessels ever introduced to this market, incorporating breakthrough technologies and operational capabilities that extend well beyond current industry standards. Designed to tackle increasingly complex projects with greater efficiency, versatility and performance, they are expected to open access to new opportunities while reinforcing Cadeler's long-term competitive advantage and commitment to innovation.

The contract builds on Cadeler's established collaboration with COSCO Shipping Offshore shipyard, which has already constructed several vessels as part of Cadeler's newbuild programme. The agreement was secured on competitive commercial terms and reinforces the strong relationship between the two companies. The contract price for the two T-class vessels is approximately EUR 805 million in aggregate.

Mikkel Gleerup, CEO of Cadeler, comments: "As offshore wind projects become larger and more technically demanding, developers need installation partners with the experience, specialised capabilities and modern fleet to deliver them safely and reliably. Our investment in the T-class reflects our commitment to staying ahead of future customer requirements, delivering best-in-class technical solutions and raising the bar for excellence in offshore wind installation.

We are pleased to continue our collaboration with COSCO Shipping Offshore shipyard, with whom we have built a strong and trusted working relationship over several years. Their understanding of our requirements and commitment to quality have made them a valued partner as we continue expanding our fleet."

The T-class vessels form part of Cadeler's long-term fleet expansion strategy and reflect Cadeler’s continued investment in the capabilities required to support the accelerating build-out of offshore wind across key markets. Cadeler is already in discussions with key clients for the deployment of the T-class vessels.

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For further information, please contact:

Cadeler Press Office

press@cadeler.com

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:

Cadeler A/S (Cadeler) is a pure-play offshore wind installation partner and a global leader in offshore wind turbine transport and installation. The company owns and operates the industry’s largest fleet of jack-up offshore wind installation vessels and is expanding its capabilities into full-scope foundation transport and installation, as well as operations & maintenance. With its modern fleet and depth of expertise across onshore and offshore operations, Cadeler supports the safe, efficient and reliable delivery of offshore wind projects worldwide. Cadeler is listed on the New York Stock Exchange (ticker: CDLR) and the Oslo Stock Exchange (ticker: CADLR). For more information, please visit www.cadeler.com.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: August 10, 2026 CADELER A/S

(Registrant)

By: /s/ Mikkel Gleerup        
Name:     Mikkel Gleerup
Title:    Chief Executive Officer

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