Niki Invest ApS tied to Cadeler (NYSE: CDLR) board member buys more shares

Rhea-AI Filing Summary

Cadeler A/S reports that Niki Invest ApS, a company closely associated with board member Ditlev Wedell-Wedellsborg, has purchased additional Cadeler shares on the Oslo Stock Exchange. On 8 June 2026, Niki Invest ApS bought 19,468 shares at an average price of NOK 55.67, for a total of NOK 1,083,723.40. On 10 June 2026, it purchased a further 5,472 shares at NOK 53.40, totaling NOK 292,204.80. These transactions were notified under EU Market Abuse Regulation rules for managers and closely associated persons.

Key Figures

Shares bought 8 June 2026: 19,468 shares Average price 8 June 2026: NOK 55.67 per share Total value 8 June 2026: NOK 1,083,723.40 +5 more

8 metrics

Shares bought 8 June 2026 19,468 shares Aggregated volume purchased by Niki Invest ApS on 8 June 2026

Average price 8 June 2026 NOK 55.67 per share Average purchase price for 19,468 Cadeler shares

Total value 8 June 2026 NOK 1,083,723.40 Consideration for shares bought by Niki Invest ApS

Shares bought 10 June 2026 5,472 shares Volume purchased by Niki Invest ApS on 10 June 2026

Price 10 June 2026 NOK 53.40 per share Purchase price for Cadeler shares on 10 June 2026

Total value 10 June 2026 NOK 292,204.80 Consideration for 5,472 shares bought on 10 June 2026

Combined shares purchased 24,940 shares Sum of 8 and 10 June 2026 Cadeler share purchases

ISIN DK0061412772 Identification code for Cadeler A/S shares

Key Terms

Market Abuse Regulation, person closely associated, jack-up offshore wind installation vessels, foreign private issuer, +1 more

5 terms

Market Abuse Regulation regulatory

"notification pursuant to article 19 of the Market Abuse Regulation (EU) no. 596/2014"

Market abuse regulation consists of laws and rules designed to prevent dishonest or manipulative practices in financial markets. It aims to ensure fair and transparent trading, so investors can trust that markets operate honestly, much like rules that keep a game fair. By reducing unfair advantages, it helps protect investor confidence and promotes healthy, efficient markets.

person closely associated regulatory

"Niki Invest ApS, a person closely associated with Ditlev Wedell-Wedellsborg"

jack-up offshore wind installation vessels technical

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

foreign private issuer regulatory

"FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER"

A foreign private issuer is a company organized outside the United States that meets tests showing it is primarily foreign-controlled and therefore qualifies for a different set of U.S. reporting rules. For investors, that means the company files less frequent or differently formatted disclosures with U.S. regulators and may follow home-country accounting and governance practices, so buying its stock is like dining at a well-reviewed restaurant that follows its home kitchen’s rules instead of the local menu — you get access but should check what standards apply.

LEI financial

"LEI | 9845008439EUED140282"

A Legal Entity Identifier (LEI) is a unique 20-character code assigned to a company or organization that participates in financial markets, like a corporate passport number. It helps investors and regulators unambiguously identify counterparties across databases and transactions, reducing confusion much like using a vehicle identification number to track a car’s history; clearer identification improves transparency, risk monitoring, and regulatory reporting.

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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 June 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

2

Stock Exchange Announcement

CADELER A/S: REPORTING ON TRANSACTIONS IN CADELER A/S SHARES BY PERSONS

DISCHARGING MANAGERIAL RESPONSIBILITIES AND PERSONS CLOSELY

ASSOCIATED WITH THEM

Copenhagen, 10 June 2026: Cadeler A/S (“Cadeler”) has received notification pursuant to article 19 of the

Market Abuse Regulation (EU) no. 596/2014 of the below transaction related to shares in Cadeler made by

persons discharging managerial responsibilities in Cadeler and/or persons closely associated with them.

Niki Invest ApS, a person closely associated with Ditlev Wedell-Wedellsborg, a member of Cadeler’s

Board of Directors, has made the transaction described in the attached notification on the date set out

therein.

Please see the attached file for further details.

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 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

3

Reporting of transactions made by persons discharging managerial responsibilities and persons

closely associated with them in Cadeler A/S’ shares

1	Details of the Reporting Person and their Closely Associated Persons
a)	Name	Niki Invest ApS
2	Reason for the notification
a)	Position/status	Closely associated person to Ditlev Wedell-Wedellsborg, member of the Board of Directors
b)	Initial notification / Amendment	Initial notification
3	Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a)	Name	Cadeler A/S
b)	LEI	9845008439EUED140282
4.1	Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a)	Description of the financial instrument, type of instrument and identification code	Shares ISIN DK0061412772
b)	Nature of the transaction	Purchase of shares
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		NOK 55.60	12,957
		NOK 55.80	6,511
d)	Aggregated information -Aggregated volume -Price	Average price per share: NOK 55.67 Total number of shares: 19,468 shares Total price: NOK 1,083,723.40
e)	Date of the transaction	8 June 2026
f)	Place of the transaction	Oslo Stock Exchange, XOSL
4.2	Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a)	Description of the financial instrument, type of instrument and identification code	Shares ISIN DK0061412772
b)	Nature of the transaction	Purchase of shares
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		NOK 53.40	5,472
d)	Aggregated information -Aggregated volume -Price	Average price per share: NOK 53.40 Total number of shares: 5,472 shares Total price: NOK 292,204.80
e)	Date of the transaction	10 June 2026
f)	Place of the transaction	Oslo Stock Exchange, XOSL

4

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: June 10, 2026 CADELER A/S

(Registrant)

By:  /s/ Mikkel Gleerup

Name: Mikkel Gleerup

Title: Chief Executive Officer

FAQ

What insider share transactions did Cadeler (CDLR) disclose in this 6-K?

Cadeler disclosed that Niki Invest ApS, closely associated with a board member, bought Cadeler shares on the Oslo Stock Exchange on 8 and 10 June 2026, in two separate transactions totaling 24,940 shares.

Who is Niki Invest ApS in relation to Cadeler (CDLR)?

Niki Invest ApS is described as a person closely associated with Ditlev Wedell-Wedellsborg, who serves on Cadeler’s Board of Directors. Its trades in Cadeler shares are therefore reportable under EU Market Abuse Regulation article 19 requirements.

What were the prices and volumes of Cadeler (CDLR) shares bought on 8 June 2026?

On 8 June 2026, Niki Invest ApS bought Cadeler shares in two tranches: 12,957 shares at NOK 55.60 and 6,511 shares at NOK 55.80. The aggregated average price was NOK 55.67 for a total of 19,468 shares.

What was the Cadeler (CDLR) share purchase on 10 June 2026?

On 10 June 2026, Niki Invest ApS purchased 5,472 Cadeler shares at a price of NOK 53.40 per share. The aggregated total value of this transaction was NOK 292,204.80, executed on the Oslo Stock Exchange (XOSL).

What is the total value of Cadeler (CDLR) shares bought by Niki Invest ApS?

Across the reported transactions, Niki Invest ApS bought 19,468 shares for NOK 1,083,723.40 on 8 June 2026 and 5,472 shares for NOK 292,204.80 on 10 June 2026, for a combined consideration of NOK 1,375,928.20.

On which market were the Cadeler (CDLR) insider share purchases executed?

Both reported transactions by Niki Invest ApS were executed on the Oslo Stock Exchange, identified as XOSL. The financial instrument is Cadeler A/S shares with ISIN DK0061412772, categorized as shares under the notification details.