Extension Study of Participants From SPG302-ALS-001

An Open-label Extension of SPG302-ALS-001 Study to Evaluate the Long-term Safety and Efficacy of Daily Oral SPG302 Treatment in Participants With Amyotrophic Lateral Sclerosis

This study will evaluate the long-term safety and efficacy of participants enrolled in SPG302-ALS-101 with Amyotrophic Lateral Sclerosis (ALS)

This is an open-label extension study of SPG302-ALS-001 to investigate the long-term safety, tolerability, and efficacy of SPG302 administered orally in participants with Amyotrophic Lateral Sclerosis (ALS). This study will allow participants in the parent study to continue dosing. Enrolled participants will continue at the dose they received at the end of the first trial, and will self-administer SPG302 orally every day for up to 52 weeks. Participants will have an in-person clinic visit every 3 months (± 3 days) and a monthly phone visit. An end of treatment visit will occur within 7 days of the last dose of SPG302. A final visit to collect safety data will be conducted up to 1 month (± 3 days) post last dose.

Inclusion Criteria:

• Must have participated in all study activities of SPG302-ALS-001, the parent study

Exclusion Criteria:

• Unable to reliably and regularly swallow whole oral medications on a daily basis.
• Medical conditions that investigator or sponsor determine would interfere with participation in clinical trial