If more than one person guaranteed my lease, does releasing me release the other guarantor too?

Not automatically. Where a lease is guaranteed by more than one person, those guarantors are typically liable jointly and severally, meaning the landlord can generally pursue any one guarantor for the full amount owed, and releasing one guarantor doesn't, on its own, release the others — each guarantee is usually treated as a separate obligation to the landlord, even if the guarantors signed the same document together.

Whether releasing you specifically affects a co-guarantor's own exposure depends on the exact wording of the release and the guarantee itself — some releases are drafted narrowly to affect only the named guarantor, while others could have broader implications depending on how the guarantee describes the guarantors' obligations to each other. This is exactly the kind of detail that needs careful review rather than assumption, since co-guarantors may have their own expectations about what happens when one of them exits.

If you're being released as part of a sale and there's a co-guarantor involved, make sure the documentation is clear about what is, and isn't, changing for them. A Treadstone business lawyer can review the guarantee structure and the proposed release together.