where is The symbiote now

Black cat's penthouse

After all that light show on the teleportation chamber the symbiote felt his molecules changing, he felt like he had disintegrated and then rebuilt, something has changed, the symbiote felt that he had evolved, now the symbiote could bond with one or more hosts on the same time.

When the teleportation failed and the light show stoped the symbiote found himself on a penthouse in New York downtown, using Peter's memorys the symbiote recognized that it was Black cat's penthouse

Knowing that Black cat was one of Peter's ex-gilrfriend he could use this against Peter to corrupt him, the symbiote thougth that the Best way to bond with Black cat it would be where she least expected it from.