Belgium: Monthly Stock Market Performance Insight - September 2025

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Monthly Gainers

Monthly Losers

Average Return

-1.57%

Total Stocks

163

View Detailed Market Cap Breakdown

Market Cap	Monthly Gainers	Monthly Losers	Average Return	Total Stocks
Large Cap	16	25	-0.51%	41
Mid Cap	10	24	-2.20%	34

Monthly Streak Leaders for September 2025

All (9) Large Cap (4) Mid Cap (4) Small Cap (1)

Stock	Streak	Streak Return
O Orange Belgium S.A \| OBEL Communication Services \| Large Cap	5 months ↑	25.00%
Orange Belgium S.A starts to shine with a 5-month winning streak (15.20 → 19.00), delivering 25.0% gains. With 351.0M revenue generating only 14.4M profit (4.1% margin) in Qtr ending Dec 2021, the market prices in future margin expansion potential.
K KBC Group NV \| KBC Financial Services \| Large Cap	5 months ↑	22.94%
KBC Group NV gains traction with a 5-month winning streak (82.52 → 101.45), delivering 22.9% gains. With 2.9B revenue generating only 546.0M profit (18.8% margin) in Qtr ending Mar 2025, the market prices in future margin expansion potential.
F Fagron NV \| FAGR Healthcare \| Large Cap	3 months ↓	-12.09%
FAGR under pressure with 3 straight negative months, declining 12.09%.
S Sofina SA \| SOF Financial Services \| Large Cap	3 months ↓	-9.71%
SOF under pressure with 3 straight negative months, declining 9.71%.
S 1Spatial Plc \| SPA Consumer Defensive \| Mid Cap	4 months ↑	12.87%
SPA maintains strong performance with 4 straight positive months, gaining 12.87%.
A Ascencio SCA \| ASCE Real Estate \| Mid Cap	3 months ↑	6.87%
ASCE maintains strong performance with 3 straight positive months, gaining 6.87%.
E Econocom Group S.E \| ECONB Technology \| Mid Cap	4 months ↓	-11.06%
ECONB under pressure with 4 straight negative months, declining 11.06%.
B Biotalys N.V \| BTLS Basic Materials \| Mid Cap	3 months ↓	-5.21%
BTLS under pressure with 3 straight negative months, declining 5.21%.
C CMB Tech N.V \| CMBT Energy \| Small Cap	1 months ↑	10.60%
CMB Tech N.V starts to shine with a 1-month winning streak (8.49 → 9.39), delivering 10.6% gains. The financials tell a compelling story: 235.0M revenue generating 40.4M net profit (17.2% margin) demonstrates exceptional profit margins as of Qtr ending Mar 2025.

Belgium Market Monthly Gainers & Losers: September 2025

All (20) Large Cap (10) Mid Cap (10)

Top Belgium Stock Gainers (September 2025)

Stock	Month Open	Month Close	Monthly Change	Avg Daily Volume	Month Volume
U UCB S.A \| UCB Healthcare \| Large Cap	€200.00	€235.00	17.59%	229.7K	5.1M
E Euronav NV \| EURN Energy \| Large Cap	€7.41	€8.49	16.14%	285.7K	6.3M
V Viohalco S.A \| VIO Industrials \| Large Cap	€6.48	€7.49	15.59%	4.2K	91.3K
U Umicore \| UMI Industrials \| Large Cap	€13.26	€15.11	13.27%	339.5K	7.5M
C Cenergy Holdings \| CENER Industrials \| Large Cap	€10.74	€12.04	12.10%	7.1K	156.6K
B Bpost SA \| BPOST Industrials \| Mid Cap	€2.13	€2.32	8.92%	195.4K	4.3M
S 1Spatial Plc \| SPA Consumer Defensive \| Mid Cap	€212.00	€228.00	7.55%	29	628
E Exmar N.V \| EXM Energy \| Mid Cap	€10.10	€10.34	5.73%	3.0K	65.5K
V Vastned Retail N.V \| VASTB Real Estate \| Mid Cap	€28.70	€30.00	5.26%	16.6K	366.1K
C CFE \| CFEB Industrials \| Mid Cap	€8.86	€9.20	3.84%	2.6K	56.8K

Biggest Belgium Stock Losers (September 2025)

Stock	Month Open	Month Close	Monthly Change	Avg Daily Volume	Month Volume
D D'Ieteren Group NV \| DIE Consumer Cyclical \| Large Cap	€185.00	€159.20	-13.99%	59.4K	1.3M
C Colruyt Group N.V \| COLR Consumer Defensive \| Large Cap	€37.70	€33.52	-10.80%	47.8K	1.1M
A Azelis Group NV \| AZE Basic Materials \| Large Cap	€12.74	€11.54	-9.42%	439.5K	9.7M
S Syneos Health \| SYENS Basic Materials \| Large Cap	€75.40	€68.70	-8.98%	159.9K	3.5M
S Solvac S.A \| SOLV Basic Materials \| Large Cap	€95.00	€87.40	-8.00%	939	20.7K
C Campine S.A \| CAMB Industrials \| Mid Cap	€260.00	€220.00	-13.73%	1.1K	24.9K
B Banque Nationale de \| BNB Financial Services \| Mid Cap	€471.00	€412.00	-12.90%	54	1.2K
I Ion Beam \| IBAB Healthcare \| Mid Cap	€11.96	€10.54	-11.87%	21.7K	477.4K
A Atenor SA \| ATEB Real Estate \| Mid Cap	€3.35	€2.98	-9.70%	7.3K	160.9K
R Retail Estates N.V \| RET Real Estate \| Mid Cap	€69.00	€63.50	-8.50%	16.7K	368.0K

Most Active Belgium Stocks During September 2025

All (10) Large Cap (5) Mid Cap (5)

Stock	Month Open	Month Close	Monthly Change	Avg Daily Volume	Monthly Volume
A Anheuser-Busch InBev \| ABI Consumer Defensive \| Large Cap	€53.68	€50.80	-5.12%	1.5M	33.5M
W Warehouses De Pauw \| WDP Real Estate \| Large Cap	€21.96	€21.28	-2.92%	494.1K	10.9M
A Azelis Group NV \| AZE Basic Materials \| Large Cap	€12.74	€11.54	-9.42%	439.5K	9.7M
K KBC Group NV \| KBC Financial Services \| Large Cap	€101.20	€101.45	0.69%	380.2K	8.4M
P Proximus \| PROX Communication Services \| Large Cap	€7.41	€7.44	0.40%	340.8K	7.5M
B Bpost SA \| BPOST Industrials \| Mid Cap	€2.13	€2.32	8.92%	195.4K	4.3M
O Ontex Group N.V \| ONTEX Consumer Defensive \| Mid Cap	€6.50	€6.32	-2.92%	120.8K	2.7M
O Onward Medical N.V \| ONWD Healthcare \| Mid Cap	€5.30	€5.18	-0.77%	118.2K	2.6M
R Recticel S.A \| RECT Industrials \| Mid Cap	€9.62	€8.94	-4.69%	73.8K	1.6M
C Care Property Invest \| CPINV Real Estate \| Mid Cap	€12.52	€11.64	-7.03%	72.1K	1.6M