PVDA (Partij Van De Arbeid)
The largest socialist political party in Belgium.
https://antwerpen.pvda.be/Organisations
Support eachother. Below are a bunch of links to leftist organisations.
Organisations with activity in Antwerp
ACA (Anarchistisch Collectief Antwerpen / Anarchist Collective Antwerp)
Collective of anarchists & libertarian socialists. Monthly affordable dinner events, protests.
https://acollectiefantwerpen.be
Campagne Rosa
Anti-capitalist feminist movement. Organiser of Pride Is A Protest.
https://campagnerosa.be/
LSP (Linkse Socialistische Partij / Leftist Socialist Party)
Belgian branch of the International Socialist Alternative, organising protests and discussions.
https://www.socialisme.be/
Hart boven hard
Movement for "value over profit", protesting for inclusive and durable policies.
https://hartbovenhard.be/
Vonk
Belgian branch of In Defence of Marxism, organising actions and discussions.
https://www.vonk.org/
Other organisations
These have no confirmed activity or presence in Antwerp, but might still be nice
Bond Precaire Woonvormen
Fighting for the right of a roof above your head
https://bondprecairewoonvormen.nl/