Longer-term Study of AR101 in Subjects Who Participated in a Prior AR101 Study (ARC008)

The purpose of this study is to assess AR101's safety, tolerability and efficacy over an extended dosing period.

This study is enrolling participants by invitation only. This is an open-label, international, longer-term extension study for eligible subjects who have participated in one of the Aimmune AR101 clinical studies.

Key Inclusion Criteria:

* Prior participation in an Aimmune AR101 clinical study or any future clinical study that identifies ARC008 as a follow-on study option in the protocol
* Written informed consent and/or assent from subjects/guardians as appropriate
* Use of effective birth control by sexually active female subjects of childbearing potential

Key Exclusion Criteria:

* Did not complete a minimum of 3 months of AR101 maintenance therapy if the subject was assigned to AR101 in the parent study
* Currently receiving or received within 5 years prior to Screening any type of peanut or other food allergen immunotherapy, except AR101 or unless allowed in the parent study, and except during the follow-up observation period in this study
* Discontinued early from the parent study