Tom O'Halleran

Tom O'Halleran served as the U.S. Representative for Arizona's 1st Congressional District from 2017 to 2023, representing one of the nation's most competitive and geographically expansive districts. A former Republican who switched parties in 2014, O'Halleran was known for his moderate, bipartisan approach on issues including rural healthcare access, veterans' affairs, and Native American rights. His congressional trading activity was notably minimal, with only 2 disclosed transactions during March 2020—a period of significant market volatility—involving positions in Caterpillar (CAT) and Newmont Mining (NEM) with an estimated volume between $2,000 and $30,000. Since those March 2020 trades, O'Halleran showed no subsequent trading activity through the remainder of his tenure, placing him among the least active traders in Congress.