Belgian short selling: week 21, 2026

From 18 May 2026 to 22 May 2026, 16 Belgium companies had disclosed short positions across 5 publication days. Changes are percentage points (pp) of issued share capital, between each company's last figure before the week and its last figure of the week, from official FSMA data.

Biggest rises

Company	Start	End	Change (pp)
SYENSQO	0.72%	0.80%	+0.08

Biggest falls

Company	Start	End	Change (pp)
SOLVAY	5.43%	4.89%	−0.54
UCB	0.69%	0.65%	−0.04
RECTICEL	0.60%	0.59%	−0.01

New disclosures

NYXOAH, first disclosed figure 0.53%

Most shorted at week end

SOLVAY, 4.89%
BIOCARTIS, 1.21%
AEDIFICA, 1.16%
BARCO, 1.02%
D'IETEREN GROUP, 1.00%

Full table: most shorted Belgian stocks.