Stocks making the biggest moves premarket: Chevron, PG&E, GameStop and more
Aon to acquire USI Insurance for $17B, slipping 1.8%. Energy stocks rise over 3% after U.S.-Iran strikes. PG&E drops 16% after California lawmakers reject wildfire liability proposal. Pinterest falls 3% following CFO's departure. GameStop up 4% on Q2 results. Deere gains 1% after Baird upgrade.
How this was made

The 30-second read
Why it matters
Overall market sentiment is split: energy stocks rally on commodity news, while utilities and select tech face setbacks from regulatory and executive changes.
Market read
Pre‑market price moves signal immediate trading opportunities but lack deep fundamental shifts.
What to watch
Potential downstream impact of Aon's large acquisition on insurance premiums and competition.
Background
The article aggregates the biggest pre‑market movers, linking each price change to a specific catalyst.
Ticker impact
Aon shares slipped 1.8% after announcing a $17 billion acquisition of USI Insurance Services.
Modest downside pressure in pre‑market trading.
Large deal size but modest price move suggests limited immediate impact.
Halliburton rose >2.5% as oil prices jumped >3% after U.S.–Iran strikes.
Continued pre‑market gains.
Price move directly tied to commodity rally.
Chevron advanced 2% in pre‑market trading following the oil price surge.
Short‑term upside.
Direct correlation with commodity price movement.
Valero Energy gained 2% as oil prices rose after Middle East strikes.
Potential further pre‑market gains.
Commodity‑driven catalyst.
Occidental Petroleum rose 2% on the same oil‑price rally.
Short‑term upside.
Direct link to commodity price.
PG&E fell 16% after California lawmakers blocked a wildfire‑liability proposal.
Continued downside pressure.
Significant regulatory outcome with large price move.
Pinterest shares dropped >3% after CFO Julia Brau Donnelly announced her departure.
Short‑term weakness.
CFO exit is a material change but modest price impact.
GameStop jumped 4% after releasing preliminary Q2 results showing income upside despite sales decline.
Potential further upside if guidance holds.
Earnings preview with clear upside.
Market effects
Energy sector gains from oil price rally; utilities face regulatory headwinds.
U.S. pre‑market activity reflects Middle East geopolitical tension.
Oil price shock influences global commodity markets.
Counterpoint
Energy gains may be short‑lived if geopolitical tensions ease; PG&E could rebound if liability rules soften.
Key entities
- CompanyAon
Insurance broker acquiring USI.
- CompanyChevron
Oil major benefiting from oil price rise.
- CompanyPG&E
Utility hit by regulatory decision.





