Arcadis NV

Transaction in Own Shares • Dec 30, 2025

Arcadis Investor Relations

ARCADIS SHARE BUYBACK PROGRAM 2025

Total Program Size: EUR 175 million Announcement: 1 October 2025, up to 9 months

Total

Summary Progres Program

Total # Shares 3,434,090 Total Consideration € 133,125,668 Average share price € 38.77 Progress % 76.1%

				Cumulative	Total 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	1-Oct	-	-	-	-	-	-	€	-
	30-Sep 1-Oct	2-Oct 3-Oct	-	- 30,451	- 30,451	- € 46.72	- € 1,422,777	- € 1,422,777	€ 29% €	- 13.39
	2-Oct	6-Oct	30,451 32,120	62,571	62,571	€ 47.53	€ 1,526,648	€ 2,949,425	30% €	14.37
	3-Oct	7-Oct	43,661	106,232	106,232	€ 47.41	€ 2,070,003	€ 5,019,428	41% €	19.49 €	47.25
Week 2	6-Oct	8-Oct	27,362	27,362	133,594	€ 48.02	€ 1,314,044	€ 1,314,044	29% €	13.81
	7-Oct	9-Oct	21,710	49,072	155,304	€ 47.93	€ 1,040,504	€ 2,354,547	23% €	10.93
	8-Oct 9-Oct	10-Oct 13-Oct	10,725 14,481	59,797 74,278	166,029 180,510	€ 47.19 € 47.80	€ 506,059 € 692,221	€ 2,860,607 € 3,552,827	11% € 15% €	5.32 7.27
	10-Oct	14-Oct	20,899	95,177	201,409	€ 47.85	€ 1,000,053	€ 4,552,880	22% €	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	16-Oct	36,760	52,789	254,198	€ 47.51	€ 1,746,537	€ 2,517,563	20% €	9.45
	15-Oct	17-Oct	19,972	72,761	274,170	€ 47.72	€ 953,088	€ 3,470,651	11% €	5.16
	16-Oct 17-Oct	20-Oct 21-Oct	58,000 53,986	130,761 184,747	332,170 386,156	€ 48.01 € 48.02	€ 2,784,336 € 2,592,359	€ 6,254,987 € 8,847,346	31% € 29% €	15.07 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	24-Oct	8,655	27,933	414,089	€ 49.24	€ 426,145	€ 1,355,968	14% €	6.89
	23-Oct	27-Oct	10,579	38,512	424,668	€ 49.02	€ 518,580	€ 1,874,549	17% €	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	3-Nov	93,000	138,690	586,698	€ 43.09	€ 4,007,091	€ 6,322,534	39% €	16.63
	31-Oct	4-Nov	102,271	240,961	688,969	€ 41.98	€ 4,293,592	€ 10,616,126	42% €	17.82 €	44.06
Week 6	3-Nov	5-Nov	121,063	121,063	810,032	€ 39.70	€ 4,806,734	€ 4,806,734	21% €	8.51
	4-Nov	6-Nov	122,928	243,991	932,960	€ 37.92	€ 4,661,602	€ 9,468,336	22% €	8.26
	5-Nov 6-Nov	7-Nov 10-Nov	99,233	343,224 440,834	1,032,193 1,129,803	€ 38.23 € 37.24	€ 3,794,084 € 3,634,635	€ 13,262,420 € 16,897,055	18% € 17% €	6.72 6.44
	7-Nov	11-Nov	97,610 123,788	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	14-Nov	48,297	151,877	1,405,468	€ 37.71	€ 1,821,207	€ 5,623,392	23% €	8.60
	13-Nov	17-Nov	29,991	181,868	1,435,459	€ 37.20	€ 1,115,608	€ 6,739,000	14% €	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	19-Nov	23,371	23,371	1,488,612	€ 36.02	€ 841,739	€ 841,739	14% €	5.13
	18-Nov	20-Nov	50,000	73,371	1,538,612	€ 35.97	€ 1,798,460	€ 2,640,199	30% €	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	24-Nov	30,000	133,010	1,598,251	€ 35.59	€ 1,067,679	€ 4,774,613	18% €	6.51
	21-Nov	25-Nov	31,090	164,100	1,629,341	€ 35.19	€ 1,094,135	€ 5,868,747	19% €	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	1-Dec	91,561	296,022	1,925,363	€ 37.68	€ 3,450,440	€ 10,898,905	24% €	9.05
	28-Nov	2-Dec	85,043	381,065	2,010,406	€ 38.08	€ 3,238,208	€ 14,137,113	22% €	8.50 €	37.10
Week 10	1-Dec	3-Dec	85,622	85,622	2,096,028	€ 37.67	€ 3,225,227	€ 3,225,227	19% €	7.00
	2-Dec	4-Dec	100,787	186,409	2,196,815	€ 37.61	€ 3,790,186	€ 7,015,412	22% €	8.23
	3-Dec	5-Dec	109,866	296,275	2,306,681	€ 37.66	€ 4,137,696	€ 11,153,109	24% €	8.98
	4-Dec 5-Dec	8-Dec 9-Dec	90,402	386,677 460,622	2,397,083 2,471,028	€ 36.88 € 37.19	€ 3,334,288 € 2,749,793	€ 14,487,397 € 17,237,189	20% € 16% €	7.24 5.97 €	37.42
			73,945
Week 11	8-Dec	10-Dec	62,869	62,869	2,533,897	€ 36.67	€ 2,305,236	€ 2,305,236	19% €	7.05
	9-Dec	11-Dec	39,140	102,009	2,573,037	€ 36.21	€ 1,417,169	€ 3,722,406	12% €	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	15-Dec	72,829	234,526	2,705,554	€ 35.93	€ 2,616,986	€ 8,490,142	22% €	8.00
	12-Dec	16-Dec	92,628	327,154	2,798,182	€ 36.33	€ 3,365,157	€ 11,855,299	28% €	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	18-Dec	54,486	125,127	2,923,309	€ 36.30	€ 1,977,973	€ 4,537,663	13% €	4.79
	17-Dec	19-Dec	87,374	212,501	3,010,683	€ 36.07	€ 3,151,274	€ 7,688,938	21% €	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	29-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
TOTAL					3,434,090			133,125,668		€	38.77

TOTAL 3,434,090 133,125,668 € 38.77