1. ExxonMobil-Pioneer Natural Resources
2. Chevron-Hess
3. Diamondback Energy-Endeavor Energy Resources
4. Chesapeake Energy-Southwestern Energy
5. Permian Resources-Earthstone Energy
Note: only the PR-Earthstone deal has been completed, while the other four are expected to close at various points in 2024. Of the five, the Chevron-Hess deal might be the most uncertain. If Chevron acquires Hess, it would also get Hess' 30% stake in Guyana's massive Stabroek oil block, but it appears that Exxon Mobil is preparing to claim pre-emptive rights to Stabroek, which would disrupt the deal, allow Exxon to outbid Chevron, or force Chevron to also pay Exxon to acquire
Hess.