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6-K

Cadeler A/S (CDLR)

6-K 2025-10-01 For: 2025-10-01
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Added on April 11, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

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

SECURITIES EXCHANGE ACT OF 1934

For the month of October 2025

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

Stock Exchange Announcement

CADELER A/S: REPORTING ON TRANSACTIONS IN CADELER A/S SHARES BYPERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES AND PERSONS CLOSELY ASSOCIATED WITH THEM

Copenhagen, 1 October 2025: 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.

BW Altor Pte. Ltd., a person closely associated with Andreas Sohmen-Pao, Chairman of the Board of Directors, has made the transactions 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

[email protected]

Alexander Simmonds

EVP & CLO, Cadeler

+44 7376 174172

[email protected]

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).

For more information, please visit www.cadeler.com

Reporting of transactions made by persons dischargingmanagerial 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 BW Altor Pte. Ltd.
2 Reason for the notification
a) Position/status Closely associated person to Andreas Sohmen-Pao, chairman 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.66 128
NOK 49.93 2,320
NOK 49.97 282
NOK 49.98 229
NOK 50.01 1,190
NOK 50.02 1,325
NOK 50.05 1,526
NOK 50.15 764
NOK 50.18 211
NOK 50.58 1,809
NOK 50.60 426
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>-      <br> Price Average price per share: NOK 50.13<br><br> <br>Total number of shares: 10,210 shares<br><br> <br>Total price: NOK 511,830.47
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction AQUIS EXCHANGE EUROPE AUCTION ON DEMAND (AOD), AQEA
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
--- --- ---
Description of the financial instrument, type of instrument and identification code Shares<br><br> <br><br><br> <br>ISIN DK0061412772
Nature of the transaction Purchase of shares
Price(s) and volume(s) Price(s) Volume(s)
--- --- ---
NOK 49.52 645
NOK 49.60 60
NOK 49.80 88
NOK 49.93 1,005
NOK 49.94 1,000
NOK 49.95 640
NOK 50.01 2,543
NOK 50.02 1,657
NOK 50.05 40,815
NOK 50.08 3,101
NOK 50.10 2,235
NOK 50.38 589
NOK 50.48 1,000
NOK 50.55 1,740
NOK 50.58 237
Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 50.07<br><br> <br>Total number of shares: 57,355 shares<br><br> <br>Total price: NOK 2,871,560.00
--- ---
Date of the transaction 30 September 2025
Place of the transaction AQUIS EXCHANGE EUROPE NON DISPLAY ORDER BOOK (NDOB), AQED
4.3 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.48 45
NOK 49.52 500
NOK 49.54 60
NOK 49.58 326
NOK 49.62 127
NOK 49.66 31
NOK 49.68 31
NOK 50.05 82
NOK 50.25 107
NOK 50.50 500
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.88<br><br> <br>Total number of shares: 1,809 shares<br><br> <br>Total price: NOK 90,234.21
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction AQUIS EXCHANGE EUROPE, AQEU
4.4 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.53 764
NOK 49.54 25
NOK 49.59 462
NOK 49.68 11,156
NOK 49.73 362
NOK 49.76 287
NOK 49.94 1,492
NOK 49.95 392
NOK 49.97 1,428
NOK 49.98 864
NOK 50.01 3,826
NOK 50.02 4,807
NOK 50.03 3,832
NOK 50.05 2,008
NOK 50.08 1,270
NOK 50.10 5,481
NOK 50.13 764
NOK 50.15 461
NOK 50.18 4,510
NOK 50.40 238
NOK 50.55 3,139
NOK 50.58 313
NOK 50.60 1,318
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 50.00<br><br> <br>Total number of shares: 49,199 shares<br><br> <br>Total price: NOK 2,460,161.33
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction CBOE EUROPE - DXE PERIODIC (NL), BEUP
4.5 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.60 60
NOK 49.70 256
NOK 49.75 1,493
NOK 49.78 184
NOK 49.79 88
NOK 49.80 44
NOK 49.93 143
NOK 49.94 1,608
NOK 49.96 521
NOK 49.97 2,224
NOK 50.01 8,408
NOK 50.02 5,108
NOK 50.03 2,900
NOK 50.05 23,515
NOK 50.08 4,278
NOK 50.10 2,332
NOK 50.15 748
NOK 50.18 616
NOK 50.33 588
NOK 50.38 1,189
NOK 50.40 741
NOK 50.55 25,247
NOK 50.58 3,110
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>-      <br> Price Average price per share: NOK 50.21<br><br> <br>Total number of shares: 85,401 shares<br><br> <br>Total price: NOK 4,288,062.58
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction CBOE EUROPE - DXE DARK ORDER BOOK (NL), CEUD
4.6 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.48 761
NOK 49.52 159
NOK 49.54 555
NOK 49.56 568
NOK 49.58 620
NOK 49.60 762
NOK 49.62 833
NOK 49.64 816
NOK 49.66 620
NOK 49.68 610
NOK 49.82 162
NOK 49.84 159
NOK 49.86 231
NOK 49.88 2,953
NOK 49.90 171
NOK 50.00 1,574
NOK 50.05 90
NOK 50.20 921
NOK 50.25 4,068
NOK 50.45 102
NOK 50.50 823
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.92<br><br> <br>Total number of shares: 17,558 shares<br><br> <br>Total price: NOK 876,545.94
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction CBOE EUROPE - DXE ORDER BOOKS (NL), CEUX
4.7 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 50.05 6,275
NOK 50.38 5,390
NOK 50.55 6,680
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 50.33<br><br> <br>Total number of shares: 18,345 shares<br><br> <br>Total price: NOK 923,259
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction BLOCKMATCH EUROPE DARK, EBLX
4.8 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.76 5,052
NOK 49.78 5,052
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.77<br><br> <br>Total number of shares: 10,104 shares<br><br> <br>Total price: NOK 502,876.08
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction HRTEU LIMITED, HREU
4.9 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 50.02 654
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 50.02<br><br> <br>Total number of shares: 654 shares<br><br> <br>Total price: NOK 32,709.81
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction TP ICAP EU - MTF - LIQUIDNET EU EQUITY, LNEQ
4.10 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.60 240
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.60<br><br> <br>Total number of shares: 240 shares<br><br> <br>Total price: NOK 11,904.00
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction FIRST NORTH SWEDEN – NORWAY, ONSE
4.11 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.71 54,046
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.71<br><br> <br>Total number of shares: 54,046 shares<br><br> <br>Total price: NOK 2,686,626.66
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction SIGMA X EUROPE NON-DISPLAYED BOOK, SGMU
4.12 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.46 752
NOK 49.60 679
NOK 49.66 509
NOK 49.71 340
NOK 49.72 334
NOK 49.73 338
NOK 49.75 334
NOK 49.76 340
NOK 49.94 1,522
NOK 49.96 2,035
NOK 49.97 5,814
NOK 49.98 4,499
NOK 50.01 4,600
NOK 50.02 4,581
NOK 50.05 4,804
NOK 50.08 2,379
NOK 50.10 5,029
NOK 50.55 274
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.99<br><br> <br>Total number of shares: 39,163 shares<br><br> <br>Total price: NOK 1,957,577.60
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction SIGMA X EUROPE AUCTION BOOK, SGMV
4.13 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.94 516
NOK 49.97 229
NOK 50.55 99
NOK 50.58 39
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 50.04<br><br> <br>Total number of shares: 883 shares<br><br> <br>Total price: NOK 44,189.05
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction TURQUOISE EUROPE - LIT AUCTIONS, TQEA
4.14 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.66 30
NOK 49.75 42
NOK 49.80 108
NOK 49.94 1,000
NOK 50.01 2,165
NOK 50.02 480
NOK 50.05 2,696
NOK 50.08 602
NOK 50.10 529
NOK 50.15 640
NOK 50.18 616
NOK 50.38 164
NOK 50.55 502
NOK 50.58 882
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 50.11<br><br> <br>Total number of shares: 10,456 shares<br><br> <br>Total price: NOK 523,997.13
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction TURQUOISE EUROPE – DARK, TQEM
4.15 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.48 248
NOK 49.54 106
NOK 49.56 191
NOK 49.58 310
NOK 49.62 62
NOK 49.64 248
NOK 49.66 236
NOK 49.68 234
NOK 49.84 72
NOK 50.00 240
NOK 50.05 361
NOK 50.25 452
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>-      <br> Price Average price per share: NOK 49.80<br><br> <br>Total number of shares: 2,760 shares<br><br> <br>Total price: NOK 137,459.61
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction TURQUOISE EUROPE, TQEX
4.16 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.52 201
NOK 49.54 398
NOK 49.56 330
NOK 49.58 2,069
NOK 49.60 2,400
NOK 49.62 1,750
NOK 49.64 700
NOK 49.66 700
NOK 49.67 130,000
NOK 49.78 26,304
NOK 49.80 600
NOK 49.84 202
NOK 49.88 3,976
NOK 49.90 12,453
NOK 50.05 99
NOK 50.50 899
NOK 50.80 155,707
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 50.21<br><br> <br>Total number of shares: 338,788 shares<br><br> <br>Total price: NOK 17,010,449.69
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction Oslo Stock Exchange, XOSL
4.17 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.68 136,806
NOK 50.05 15,680
NOK 50.55 5,880
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.75<br><br> <br>Total number of shares: 158,366 shares<br><br> <br>Total price: NOK 7,878,540.08
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction POSIT AUCTION, XPAC
4.18 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<br><br> <br><br><br> <br>ISIN DK0061412772
b) Nature of the transaction Purchase of shares
c) Price(s) and volume(s) Price(s) Volume(s)
--- --- --- ---
NOK 49.61 324
NOK 49.68 452,870
NOK 50.02 4,224
NOK 50.04 1,960
NOK 50.05 42,140
NOK 50.08 11,903
NOK 50.10 33,320
NOK 50.15 2,940
NOK 50.18 1,402
NOK 50.28 1,490
NOK 50.55 34,300
d) Aggregated information<br><br> <br>-      <br> Aggregated volume<br><br> <br>Price Average price per share: NOK 49.80<br><br> <br>Total number of shares: 586,873 shares<br><br> <br>Total price: NOK 29,225,039.83
--- --- ---
e) Date of the transaction 30 September 2025
f) Place of the transaction POSIT DARK, XPOS

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: October 1, 2025 CADELER A/S
(Registrant)
By: /s/ Mikkel Gleerup
Name: Mikkel Gleerup
Title: Chief Executive Officer