Arcadis NV

Transaction in Own Shares • Jan 6, 2026

Arcadis Investor Relations

ARCADIS SHARE BUYBACK PROGRAM 2025

Total Program Size: EUR 175 million

Announcement: 1 October 2025, up to 9 months

Summary Progres Program

Total # Shares		3,680,327
Total Consideration		€ 141,923,695
Average share price	€	38.56
Progress %		81.1%

Average share price	€ 38.56
Progress %	81.1%				Total
				Cumulative	Repurchased Shares / since			Cumulative Costs /			Weighted avg share price /
as mentioned in press release	Trade date	Value Date	# shares / day	Shares / week		program start Share price / day	Costs / day	week	€	week -
Week 1	29-Sep	01-Oct	-	-	-	-	-	-	€	-
	30-Sep	02-Oct	-	-	-	-	-	-	€	-
	01-Oct 02-Oct	03-Oct 06-Oct	30,451 32,120	30,451 62,571	30,451 62,571	€ 46.72 € 47.53	€ 1,422,777 € 1,526,648	€ 1,422,777 € 2,949,425	29% € 30% €	13.39 14.37
	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	27,362	133,594	€ 48.02	€ 1,314,044	€ 1,314,044	29% €	13.81
	07-Oct	09-Oct	21,710	49,072	155,304	€ 47.93	€ 1,040,504	€ 2,354,547	23% €	10.93
	08-Oct	10-Oct	10,725	59,797	166,029	€ 47.19	€ 506,059	€ 2,860,607	11% €	5.32
	09-Oct 10-Oct	13-Oct 14-Oct	14,481 20,899	74,278 95,177	180,510 201,409	€ 47.80 € 47.85	€ 692,221 € 1,000,053	€ 3,552,827 € 4,552,880	15% € 22% €	7.27 10.51 €	47.84
Week 3	13-Oct	15-Oct	16,029	16,029	217,438	€ 48.10	€ 771,025	€ 771,025	9% €	4.17
	14-Oct 15-Oct	16-Oct 17-Oct	36,760 19,972	52,789 72,761	254,198 274,170	€ 47.51 € 47.72	€ 1,746,537 € 953,088	€ 2,517,563 € 3,470,651	20% € 11% €	9.45 5.16
	16-Oct	20-Oct	58,000	130,761	332,170	€ 48.01	€ 2,784,336	€ 6,254,987	31% €	15.07
	17-Oct	21-Oct	53,986	184,747	386,156	€ 48.02	€ 2,592,359	€ 8,847,346	29% €	14.03 €	47.89
Week 4	20-Oct	22-Oct	5,330	5,330	391,486	€ 47.79	€ 254,733	€ 254,733	9% €	4.12
	21-Oct	23-Oct	13,948	19,278	405,434	€ 48.40	€ 675,090	€ 929,824	23% €	10.91
	22-Oct 23-Oct	24-Oct 27-Oct	8,655 10,579	27,933 38,512	414,089 424,668	€ 49.24 € 49.02	€ 426,145 € 518,580	€ 1,355,968 € 1,874,549	14% € 17% €	6.89 8.38
	24-Oct	28-Oct	23,340	61,852	448,008	€ 50.12	€ 1,169,838	€ 3,044,387	38% €	18.91 €	49.22
Week 5	27-Oct 28-Oct	29-Oct 30-Oct	13,406 15,088	13,406 28,494	461,414 476,502	€ 50.71 € 50.45	€ 679,795 € 761,116	€ 679,795 € 1,440,911	6% € 6% €	2.82 3.16
	29-Oct	31-Oct	17,196	45,690	493,698	€ 50.86	€ 874,532	€ 2,315,443	7% €	3.63
	30-Oct 31-Oct	03-Nov 04-Nov	93,000 102,271	138,690 240,961	586,698 688,969	€ 43.09 € 41.98	€ 4,007,091 € 4,293,592	€ 6,322,534 € 10,616,126	39% € 42% €	16.63 17.82 €	44.06
Week 6	03-Nov	05-Nov	121,063	121,063	810,032	€ 39.70	€ 4,806,734	€ 4,806,734	21% €	8.51
	04-Nov 05-Nov	06-Nov 07-Nov	122,928 99,233	243,991 343,224	932,960 1,032,193	€ 37.92 € 38.23	€ 4,661,602 € 3,794,084	€ 9,468,336 € 13,262,420	22% € 18% €	8.26 6.72
	06-Nov	10-Nov	97,610	440,834	1,129,803	€ 37.24	€ 3,634,635	€ 16,897,055	17% €	6.44
	07-Nov	11-Nov	123,788	564,622	1,253,591	€ 36.24	€ 4,485,557	€ 21,382,613	22% €	7.94 €	37.87
Week 7	10-Nov	12-Nov	102,580	102,580	1,356,171	€ 36.71	€ 3,765,332	€ 3,765,332	48% €	17.79
	11-Nov	13-Nov	1,000	103,580	1,357,171	€ 36.85	€ 36,853	€ 3,802,185	0% €	0.17
	12-Nov 13-Nov	14-Nov 17-Nov	48,297 29,991	151,877 181,868	1,405,468 1,435,459	€ 37.71 € 37.20	€ 1,821,207 € 1,115,608	€ 5,623,392 € 6,739,000	23% € 14% €	8.60 5.27
	14-Nov	18-Nov	29,782	211,650	1,465,241	€ 36.28	€ 1,080,440	€ 7,819,441	14% €	5.10 €	36.95
Week 8	17-Nov 18-Nov	19-Nov 20-Nov	23,371 50,000	23,371 73,371	1,488,612 1,538,612	€ 36.02 € 35.97	€ 841,739 € 1,798,460	€ 841,739 € 2,640,199	14% € 30% €	5.13 10.96
	19-Nov	21-Nov	29,639	103,010	1,568,251	€ 35.99	€ 1,066,734	€ 3,706,934	18% €	6.50
	20-Nov 21-Nov	24-Nov 25-Nov	30,000 31,090	133,010 164,100	1,598,251 1,629,341	€ 35.59 € 35.19	€ 1,067,679 € 1,094,135	€ 4,774,613 € 5,868,747	18% € 19% €	6.51 6.67 €	35.76
Week 9	24-Nov	26-Nov	68,090	68,090	1,697,431	€ 36.09	€ 2,457,457	€ 2,457,457	18% €	6.45
	25-Nov 26-Nov	27-Nov 28-Nov	63,659 72,712	131,749 204,461	1,761,090 1,833,802	€ 36.32 € 36.84	€ 2,311,942 € 2,679,066	€ 4,769,399 € 7,448,465	17% € 19% €	6.07 7.03
	27-Nov	01-Dec	91,561	296,022	1,925,363	€ 37.68	€ 3,450,440	€ 10,898,905	24% €	9.05
	28-Nov	02-Dec	85,043	381,065	2,010,406	€ 38.08	€ 3,238,208	€ 14,137,113	22% €	8.50 €	37.10
Week 10	01-Dec	03-Dec	85,622	85,622	2,096,028	€ 37.67	€ 3,225,227	€ 3,225,227	19% €	7.00
	02-Dec	04-Dec	100,787	186,409	2,196,815	€ 37.61	€ 3,790,186	€ 7,015,412	22% €	8.23
	03-Dec 04-Dec	05-Dec 08-Dec	109,866 90,402	296,275 386,677	2,306,681 2,397,083	€ 37.66 € 36.88	€ 4,137,696 € 3,334,288	€ 11,153,109 € 14,487,397	24% € 20% €	8.98 7.24
	05-Dec	09-Dec	73,945	460,622	2,471,028	€ 37.19	€ 2,749,793	€ 17,237,189	16% €	5.97 €	37.42
Week 11	08-Dec 09-Dec	10-Dec 11-Dec	62,869 39,140	62,869 102,009	2,533,897 2,573,037	€ 36.67 € 36.21	€ 2,305,236 € 1,417,169	€ 2,305,236 € 3,722,406	19% € 12% €	7.05 4.33
	10-Dec	12-Dec	59,688	161,697	2,632,725	€ 36.03	€ 2,150,750	€ 5,873,156	18% €	6.57
	11-Dec 12-Dec	15-Dec 16-Dec	72,829 92,628	234,526 327,154	2,705,554 2,798,182	€ 35.93 € 36.33	€ 2,616,986 € 3,365,157	€ 8,490,142 € 11,855,299	22% € 28% €	8.00 10.29 €	36.24
Week 12	15-Dec	17-Dec	70,641	70,641	2,868,823	€ 36.24	€ 2,559,691	€ 2,559,691	17% €	6.19
	16-Dec 17-Dec	18-Dec 19-Dec	54,486 87,374	125,127 212,501	2,923,309 3,010,683	€ 36.30 € 36.07	€ 1,977,973 € 3,151,274	€ 4,537,663 € 7,688,938	13% € 21% €	4.79 7.63
	18-Dec	22-Dec	98,401	310,902	3,109,084	€ 36.11	€ 3,553,703	€ 11,242,641	24% €	8.60
	19-Dec	23-Dec	102,377	413,279	3,211,461	€ 35.81	€ 3,666,090	€ 14,908,730	25% €	8.87 €	36.07
Week 13	22-Dec	24-Dec	88,945	88,945	3,300,406	€ 35.11	€ 3,123,037	€ 3,123,037	40% €	14.03
	23-Dec	24-Dec	85,233	174,178	3,385,639	€ 35.28	€ 3,007,378	€ 6,130,415	38% €	13.51
	24-Dec 25-Dec	30-Dec n/a	48,451	222,629 222,629	3,434,090 3,434,090	€ 35.21	€ 1,705,955	€ 7,836,370 € 7,836,370	22% € 0% €	7.66 -
	26-Dec	n/a		222,629	3,434,090			€ 7,836,370	0% €	- €	35.20
Week 14	29-Dec 30-Dec	31-Dec 02-Jan	71,073 50,145	71,073 121,218	3,505,163 3,555,308	€ 35.63 € 35.79	€ 2,532,473 € 1,794,860	€ 2,532,473 € 4,327,333	29% € 20% €	10.28 7.29
	31-Dec	05-Jan	31,069	152,287	3,586,377	€ 35.72	€ 1,109,651	€ 5,436,984	13% €	4.51
	01-Jan 02-Jan	n/a 06-Jan		152,287 246,237	3,586,377 3,680,327	€ 35.77	€ 0 € 3,361,042	€ 5,436,984 € 8,798,027	0% € 38% €	- 13.65 €	35.73
			93,950

TOTAL 3,680,327 € 141,923,695 € 38.56