Sealaska Corporation is the largest of thirteen Alaska Native Regional Corporations create under the Alaska Native Claims Settlement Act of 1971 (ANCSA) in settlement of aboriginal land claims. Sealaska was incorporated in Alaska on June 16, 1972. Headquartered in Juneau, Alaska, Sealaska is a for-profit corporation with 17,600 Alaska Native shareholders primarily of Tlingit, Haida, and Tsimshian descent.