I have clients wanting to take deposits for AngelList, Atlassian, BlaBlaCar,Domo,Etsy,Flipboard,Houzz,Kickstarter,LegalZoom,Lookout,MapR Technologies,
You can lend them those securities and they will use them as collateral and when you have the money you can redeem them, otherwise they are transfer to them. Email me should you be interested.