Sumner Tucker Pike (August 30, 1891 – February 21, 1976) was an American politician and government official who was a member of the U.S. Securities and Exchange Commission from 1940 to 1946 and a member of the Atomic Energy Commission (AEC) from 1946 to 1951, serving as acting chairman of the AEC during 1950.

Pike grew up in Lubec, Maine,[1] a small fishing village in the northeastern portion of the state.

[2] During World War II he was on the Securities and Exchange Commission and also was in the Office of Price Administration.

[6] However, by the time President Harry S. Truman ordered that development of the Super go on, Pike's position had drifted to being in favor of proceeding.

[8] In 1950, the Joint Atomic Energy Committee of Congress voted five to four (with one Democrat joining the four Republicans on the panel) not to approve of President Harry S. Truman's nomination of Pike as chairman of the Atomic Energy Commission, when he was acting as chairman.