How to get Fulmin Prime Stock in Warframe?

Fulmin Prime Stock is an item dropped from Void relics.
You can find the list of relics below, and click on the links to see how to get them.

Relics dropping Fulmin Prime Stock

Other items:
Fulmin Solstice Skin Blueprint - Fulmin Prime Barrel - Fulmin Prime Receiver
Fulmin Prime Blueprint - Fulmination - Primed Fulmination