While I’m generally skeptical of boycotts, BDS scares the shit out of Israel. Because I do believe if BDS becomes a global movement it really could change things. I’ll start with the list from bdsmovement.net and then add to the list as people list other companies to boycott in the comments:
Hewlett-Packard (computer hardware)
Siemens (tech conglomerate)
AXA (banking & insurance)
Puma (clothing)
Israeli fruits and vegetables (usually labeled)
SodaStream (idk that garbage home soda)
Ahava (cosmetics)
Sabra (hummus)
I think they do a lot of cutting and polishing, i.e. they import raw stones and manufacture them into diamonds.
Source: the movie Snatch