Contact Us

Tosk is located in the heart of “Biotech Bay” on the San Francisco Peninsula. Our headquarters is in Mountain View, California, and our laboratory in nearby Sunnyvale, California. We may be contacted at:

Tel: 408-245-6838 | Fax: 408-245-6808 | Email:

2672 Bayshore Parkway, Suite 507
Mountain View, CA 94043

725 San Aleso Avenue, #4
Sunnyvale, CA 94085