Contact Us

For US Mail:
PO Box 8049
Rancho Santa Fe, CA 92067

For Courier Service:
16236 San Dieguito Road, Suite 3-09
Rancho Santa Fe, CA 92067

Oil & Gas
Phone: 858.779.5804
Email: info@cornerstoneamc.com

Investment Products:
Phone: 858.779.5800
Email: marketing@cornerstoneamc.com

Controlled Entities

If you or your company desires to lease, obtain a term assignment or any other type of exploration or production agreement from any of the entities listed, please contact us at 858.779.5800.

If you are an oil and gas purchaser or operator and any production-related payments are due to any of the entities listed, please forward payments to the applicable address below for deposit.

Cornerstone controls the following entities:

American Assurance 2000, L.P. (formerly JDT 2000, L.P.)
Dept 1240
P.O. Box 17180
Denver, CO 80217-0180

Cobra Petroleum Company, LP
P.O. Box 8049
Rancho Santa Fe, CA 92067

Metcalfe Minerals, L.P.
P.O. Box 8049
Rancho Santa Fe, CA 92067

Royalty Repository II, LLC
P.O. Box 8049
Rancho Santa Fe, CA 92067