Arcadis NV

Transaction in Own Shares • Dec 9, 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 2,471,028 Total Consideration € 98,525,270 Average share price € 39.87 Progress % 56%

					Repurchased
				Cumulative	Shares / since			Cumulative Costs /			Weighted avg share price /
	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	30,451	€ 46.72	€ 1,422,777	€ 1,422,777	29% €	13.39
	02-Oct	06-Oct	32,120	62,571	62,571	€ 47.53	€ 1,526,648	€ 2,949,425	30% €	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 07-Oct	08-Oct 09-Oct	27,362 21,710	27,362 49,072	133,594 155,304	€ 48.02 € 47.93	€ 1,314,044 € 1,040,504	€ 1,314,044 € 2,354,547	29% € 23% €	13.81 10.93
	08-Oct	10-Oct	10,725	59,797	166,029	€ 47.19	€ 506,059	€ 2,860,607	11% €	5.32
	09-Oct	13-Oct	14,481	74,278	180,510	€ 47.80	€ 692,221	€ 3,552,827	15% €	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	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 21-Oct	22-Oct 23-Oct	5,330 13,948	5,330 19,278	391,486 405,434	€ 47.79 € 48.40	€ 254,733 € 675,090	€ 254,733 € 929,824	9% € 23% €	4.12 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	29-Oct	13,406	13,406	461,414	€ 50.71	€ 679,795	€ 679,795	6% €	2.82
	28-Oct	30-Oct	15,088	28,494	476,502	€ 50.45	€ 761,116	€ 1,440,911	6% €	3.16
	29-Oct	31-Oct	17,196	45,690	493,698	€ 50.86	€ 874,532	€ 2,315,443	7% €	3.63
	30-Oct	03-Nov	93,000	138,690	586,698	€ 43.09	€ 4,007,091	€ 6,322,534	39% €	16.63
	31-Oct	04-Nov	102,271	240,961	688,969	€ 41.98	€ 4,293,592	€ 10,616,126	42% €	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	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 19-Nov	20-Nov 21-Nov	50,000 29,639	73,371 103,010	1,538,612 1,568,251	€ 35.97 € 35.99	€ 1,798,460 € 1,066,734	€ 2,640,199 € 3,706,934	30% € 18% €	10.96 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	27-Nov	63,659	131,749	1,761,090	€ 36.32	€ 2,311,942	€ 4,769,399	17% €	6.07
	26-Nov	28-Nov	72,712	204,461	1,833,802	€ 36.84	€ 2,679,066	€ 7,448,465	19% €	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
TOTAL					2,471,028			98,525,270		€	39.87