Arcadis NV

Transaction in Own Shares • Nov 11, 2025

Arcadis Investor Relations

ARCADIS SHARE BUYBACK PROGRAM 2025

Total Program Size: EUR 175 million

Total

Announcement: 1 October 2025, up to 9 months

Summary Progres Program

Total # Shares		1,253,591
Total Consideration		€ 53,462,779
Average share price	€	42.65
Progress %		31%

Trade date Value Date # shares / day Shares / week program start Share price / day Costs / day week week as mentioned in press release € - Week 1 29-Sep 01-Oct € - - - - - - - 30-Sep 02-Oct € - - - - - - - 01-Oct 03-Oct 30,451 30,451 € 46.72 € 1,422,777 € 1,422,777 29% € 13.39 30,451 02-Oct 06-Oct 62,571 62,571 € 47.53 € 1,526,648 € 2,949,425 30% € 14.37 32,120 03-Oct 07-Oct 43,661 106,232 106,232 € 47.41 € 2,070,003 € 5,019,428 41% € 19.49 € 47.25 Week 2 06-Oct 08-Oct 27,362 133,594 € 48.02 € 1,314,044 € 1,314,044 29% € 13.81 27,362 07-Oct 09-Oct 49,072 155,304 € 47.93 € 1,040,504 € 2,354,547 23% € 10.93 21,710 08-Oct 10-Oct 59,797 166,029 € 47.19 € 506,059 € 2,860,607 11% € 5.32 10,725 09-Oct 13-Oct 74,278 180,510 € 47.80 € 692,221 € 3,552,827 15% € 7.27 14,481 10-Oct 14-Oct 95,177 201,409 € 47.85 € 1,000,053 € 4,552,880 22% € 10.51 € 47.84 20,899 Week 3 13-Oct 15-Oct 16,029 217,438 € 48.10 € 771,025 € 771,025 9% € 4.17 16,029 14-Oct 16-Oct 52,789 254,198 € 47.51 € 1,746,537 € 2,517,563 20% € 9.45 36,760 15-Oct 17-Oct 72,761 274,170 € 47.72 € 953,088 € 3,470,651 11% € 5.16 19,972 16-Oct 20-Oct 130,761 332,170 € 48.01 € 2,784,336 € 6,254,987 31% € 15.07 58,000 17-Oct 21-Oct 184,747 386,156 € 48.02 € 2,592,359 € 8,847,346 29% € 14.03 € 47.89 53,986 Week 4 20-Oct 22-Oct 5,330 391,486 € 47.79 € 254,733 € 254,733 9% € 4.12 5,330 21-Oct 23-Oct 19,278 405,434 € 48.40 € 675,090 € 929,824 23% € 10.91 13,948 22-Oct 24-Oct 8,655 27,933 414,089 € 49.24 € 426,145 € 1,355,968 14% € 6.89 23-Oct 27-Oct 38,512 424,668 € 49.02 € 518,580 € 1,874,549 17% € 8.38 10,579 24-Oct 28-Oct 61,852 448,008 € 50.12 € 1,169,838 € 3,044,387 38% € 18.91 € 49.22 23,340 Week 5 27-Oct 29-Oct 13,406 461,414 € 50.71 € 679,795 € 679,795 6% € 2.82 13,406 28-Oct 30-Oct 28,494 476,502 € 50.45 € 761,116 € 1,440,911 6% € 3.16 15,088 29-Oct 31-Oct 45,690 493,698 € 50.86 € 874,532 € 2,315,443 7% € 3.63 17,196 30-Oct 03-Nov 138,690 586,698 € 43.09 € 4,007,091 € 6,322,534 39% € 16.63 93,000 31-Oct 04-Nov 240,961 688,969 € 41.98 € 4,293,592 € 10,616,126 42% € 17.82 € 44.06 102,271 Week 6 03-Nov 05-Nov 121,063 810,032 € 39.70 € 4,806,734 € 4,806,734 21% € 8.51 121,063 04-Nov 06-Nov 243,991 932,960 € 37.92 € 4,661,602 € 9,468,336 22% € 8.26 122,928 05-Nov 07-Nov 99,233 343,224 1,032,193 € 38.23 € 3,794,084 € 13,262,420 18% € 6.72 06-Nov 10-Nov 440,834 1,129,803 € 37.24 € 3,634,635 € 16,897,055 17% € 6.44 97,610 07-Nov 11-Nov 564,622 1,253,591 € 36.24 € 4,485,557 € 21,382,613 22% € 7.94 € 37.87 123,788			Cumulative	Repurchased Shares / since		Cumulative Costs /		Weighted avg share price /
	TOTAL			1,253,591		53,462,779	€		42.65