[10] The company owns the largest share of the Trans-Alaska Pipeline System,[11] after purchasing BP's 49% stake in 2019.
[17] The Pennsylvania Department of Environmental Protection claimed in 2017 that Hilcorp's fracking operations in the state caused a chain of earthquakes in the prior year.
[19][20] In October 2024, Hilcorp was subject to an enforcement action brought by the Department of Justice for widespread Clean Air Act violations across its New Mexico operations.
The Department of Justice found that "Hilcorp’s actions resulted in thousands of tons of harmful methane and VOC emissions being released into the environment.
Methane is a climate super pollutant and potent greenhouse gas that contributes to climate change, and VOCs adversely affect human health in multiple ways, including being involved in the formation of ground level ozone.