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Intangible assets (Tables)
12 Months Ended
Dec. 31, 2025
Intangible assets  
Disclosure of detailed information about intangible assets

Acquired

Developed

customers,

technology and

Patents and

technology and

software under

in 000€

  ​ ​ ​

licenses

  ​ ​ ​

Software

  ​ ​ ​

order backlog

  ​ ​ ​

construction

  ​ ​ ​

Total

Acquisition value

  ​

  ​

  ​

  ​

  ​

At January 1, 2023

 

6,915

 

12,679

 

44,431

 

8,527

 

72,552

Additions

 

327

 

1,006

 

 

1,685

 

3,018

Disposals

 

(132)

 

(4,504)

 

 

(45)

 

(4,680)

Transfer between accounts

 

129

 

7,458

 

 

(7,603)

 

(16)

Currency translation

 

0

 

11

 

241

 

 

252

At December 31, 2023

 

7,239

 

16,649

 

44,673

 

2,564

 

71,125

Additions

 

315

79

1,477

1,871

Acquisition of a subsidiary

 

122

2,938

3,060

Disposals

 

(11)

(278)

(289)

Transfer between accounts

 

102

1,413

(1,516)

0

Currency translation

 

1

(33)

(139)

(2)

(173)

At December 31, 2024

 

7,768

17,830

47,472

2,523

75,593

Additions

 

470

330

48

1,371

2,220

Disposals

 

(529)

(388)

(17)

(934)

Transfer between accounts

 

41

1,410

(48)

(1,369)

33

Currency translation

 

(1)

(3)

(284)

(0)

(288)

Assets held for sale

 

(1)

(424)

(426)

At December 31, 2025

 

7,749

18,754

47,188

2,508

76,199

Acquired

Developed

customers,

technology and

Patents and

technology and

software under

in 000€

  ​ ​ ​

licenses

  ​ ​ ​

Software

  ​ ​ ​

order backlog

  ​ ​ ​

construction

  ​ ​ ​

Total

Amortization & Impairments

  ​

  ​

  ​

  ​

  ​

At January 1, 2023

 

(4,829)

 

(10,799)

 

(16,957)

 

(2,090)

 

(34,676)

Amortization charge for the year

 

(755)

 

(3,027)

 

(2,722)

 

 

(6,504)

Impairments

 

 

(2,915)

 

 

(2,915)

Disposals

 

132

 

4,504

 

 

 

4,636

Currency translation

(0)

 

(10)

 

(191)

 

 

(202)

At December 31, 2023

 

(5,453)

 

(9,333)

 

(22,785)

 

(2,090)

 

(39,661)

Amortization charge for the year

 

(531)

(3,763)

(2,095)

(6,389)

Impairments

 

(46)

(46)

Disposals

 

11

 

278

 

 

 

289

Transfer between accounts

 

(0)

 

(0)

 

 

 

(0)

Currency translation

 

 

33

 

154

 

 

187

At December 31, 2024

 

(5,973)

(12,830)

(24,726)

(2,090)

(45,619)

Amortization charge for the year

 

(485)

(4,122)

(1,823)

(6,431)

Disposals

 

428

 

385

 

 

 

813

Currency translation

 

0

 

3

 

284

 

 

288

Assets held for sale

 

1

 

389

 

 

 

390

At December 31, 2025

 

(6,029)

(16,176)

(26,265)

(2,090)

(50,560)

Net carrying value

 

 

 

 

 

At December 31, 2025

 

1,721

2,578

20,923

418

25,639

At December 31, 2024

 

1,794

4,999

22,746

433

29,973

At December 31, 2023

 

1,786

 

7,316

 

21,887

 

474

 

31,464

At January 1, 2023

 

2,086

 

1,879

 

27,474

 

6,437

 

37,875