Belgium: Weekly Stock Market Performance Insight - December 15 - 21, 2025

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Weekly Gainers

Weekly Losers

Average Return

0.80%

Total Stocks

154

View Detailed Market Cap Breakdown

Market Cap	Weekly Gainers	Weekly Losers	Average Return	Total Stocks
Large Cap	24	13	1.26%	39
Mid Cap	19	14	0.91%	36

Weekly Streak Leaders for Week: December 15 - 21, 2025

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

Stock	Streak	Streak Return
U Umicore \| UMI Industrials \| Large Cap	4 weeks ↑	18.28%
K KBC Group NV \| KBC Financial Services \| Large Cap	4 weeks ↑	6.16%
KBC Group NV starts to shine with a 4-week winning streak (105.55 → 112.05), delivering 6.2% 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.
S Solvay SA \| SOLB Basic Materials \| Large Cap	4 weeks ↓	-1.18%
Solvay SA takes a breather following a 4-week decline (27.12 → 26.80), down 1.2%. Revenue of 1.2B provides a foundation, but 83.0M net income (6.7% margin) in Qtr ending Mar 2025 highlights operational challenges that need addressing.
C CMB Tech N.V \| CMBT Energy \| Large Cap	3 weeks ↓	-14.18%
CMB Tech N.V consolidates with a 3-week decline (9.45 → 8.11), down 14.2%. Weak margins on 387.2M revenue with only 14.7M profit (3.8% margin) in Qtr ending Sep 2025 validate market skepticism. Structural improvements needed before sentiment shifts.
I Ion Beam \| IBAB Healthcare \| Mid Cap	5 weeks ↑	17.14%
B Bpost SA \| BPOST Industrials \| Mid Cap	4 weeks ↑	16.00%
Bpost SA gains traction with a 4-week winning streak (1.75 → 2.03), delivering 16.0% gains. With 1.1B revenue generating only 1.3M profit (0.1% margin) in Qtr ending Jun 2025, the market prices in future margin expansion potential.
B Banque Nationale de \| BNB Financial Services \| Mid Cap	3 weeks ↓	-5.35%
A Atenor SA \| ATEB Real Estate \| Mid Cap	3 weeks ↓	-4.94%
C CMB Tech N.V \| CMBT Energy \| Small Cap	3 weeks ↓	-12.49%
CMB Tech N.V consolidates with a 3-week decline (10.97 → 9.60), down 12.5%. However, fundamentals remain robust: 235.0M revenue generating 40.4M profit (17.2% margin) as of Qtr ending Mar 2025 suggests this could be a temporary setback. Value hunters take note.

Belgium Market Weekly Gainers & Losers: December 15 - 21, 2025

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

Top Belgium Stock Gainers (December 15 - 21, 2025)

Stock	Week Open	Week Close	Weekly Change	Avg Daily Volume	Week Volume
T Titan Cement \| TITC Basic Materials \| Large Cap	€45.80	€48.95	7.70%	31.8K	158.9K
U Umicore \| UMI Industrials \| Large Cap	€16.44	€17.34	6.38%	1.1M	5.3M
E Elia Group SA/NV \| ELI Utilities \| Large Cap	€102.40	€108.10	6.08%	117.7K	588.7K
A Aedifica N.V \| AED Real Estate \| Large Cap	€63.95	€66.80	5.78%	156.5K	782.7K
L Lotus Bakeries NV \| LOTB Consumer Defensive \| Large Cap	€7,470.00	€7,770.00	4.30%	673	3.4K
C Campine S.A \| CAMB Industrials \| Mid Cap	€173.00	€202.00	12.53%	1.8K	8.9K
F Floridienne S.A \| FLOB Industrials \| Mid Cap	€605.00	€630.00	8.62%	96	481
I Ion Beam \| IBAB Healthcare \| Mid Cap	€11.70	€12.30	6.40%	42.5K	212.5K
W Wereldhave Belgium \| WEHB Real Estate \| Mid Cap	€50.40	€52.00	4.42%	5.1K	25.3K
W What's Cooking \| WHATS Consumer Defensive \| Mid Cap	€105.00	€109.00	3.81%	382	1.9K

Biggest Belgium Stock Losers (December 15 - 21, 2025)

Stock	Week Open	Week Close	Weekly Change	Avg Daily Volume	Week Volume
S Syneos Health \| SYENS Basic Materials \| Large Cap	€71.58	€68.10	-5.10%	172.7K	863.6K
C Colruyt Group N.V \| COLR Consumer Defensive \| Large Cap	€32.72	€31.44	-3.85%	121.4K	607.1K
A Argenx SE \| ARGX Healthcare \| Large Cap	€710.00	€735.80	-2.31%	121.2K	606.1K
C Cenergy Holdings \| CENER Industrials \| Large Cap	€16.06	€15.58	-2.01%	21.6K	107.9K
E Euronav NV \| EURN Energy \| Large Cap	€8.26	€8.11	-1.93%	280.9K	1.4M
O Ontex Group N.V \| ONTEX Consumer Defensive \| Mid Cap	€5.00	€4.59	-8.20%	452.2K	2.3M
C CFE \| CFEB Industrials \| Mid Cap	€9.10	€8.80	-3.72%	3.1K	15.7K
M Moury Construct S.A \| MOUR Industrials \| Mid Cap	€584.00	€564.00	-3.42%	124	622
E Exmar N.V \| EXM Energy \| Mid Cap	€10.00	€9.95	-3.21%	1.6K	7.8K
A Atenor SA \| ATEB Real Estate \| Mid Cap	€2.56	€2.50	-1.96%	16.7K	83.7K

Most Active Belgium Stocks During Week: December 15 - 21, 2025

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

Stock	Week Open	Week Close	Weekly Change	Avg Daily Volume	Weekly Volume
A Anheuser-Busch InBev \| ABI Consumer Defensive \| Large Cap	€54.48	€55.48	2.48%	2.6M	13.1M
U Umicore \| UMI Industrials \| Large Cap	€16.44	€17.34	6.38%	1.1M	5.3M
A Azelis Group NV \| AZE Basic Materials \| Large Cap	€9.32	€9.45	0.96%	1.0M	5.2M
K KBC Group NV \| KBC Financial Services \| Large Cap	€108.65	€112.05	3.37%	558.7K	2.8M
P Proximus \| PROX Communication Services \| Large Cap	€7.07	€7.01	-0.57%	473.0K	2.4M
O Ontex Group N.V \| ONTEX Consumer Defensive \| Mid Cap	€5.00	€4.59	-8.20%	452.2K	2.3M
B Bpost SA \| BPOST Industrials \| Mid Cap	€1.97	€2.03	3.05%	249.3K	1.2M
O Onward Medical N.V \| ONWD Healthcare \| Mid Cap	€4.06	€4.09	1.24%	150.8K	753.9K
B Barco N.V \| BAR Technology \| Mid Cap	€11.78	€11.85	0.68%	124.6K	622.9K
D Deceuninck NV \| DECB Industrials \| Mid Cap	€2.27	€2.26	-0.44%	111.4K	557.2K