# Spindletop / Gladys City Unit Operators List — 2026

> Active operators on Spindletop and the modern Gladys City Unit — long-tenured private waterflood operators in Jefferson County, Texas.

**URL:** https://www.buckheadenergy.com/spindletop-gladys-city-operators-2026
**Source:** Buckhead Energy (https://www.buckheadenergy.com/)
**Generated:** 2026-08-11 (heuristic; server-side extraction)

## Answer
Quick answer Modern Spindletop / Gladys City Unit operators are predominantly long-tenured private waterflood operators running the modern Miocene flank waterflood. Major mature-asset operators with selected positions include Hilcorp Energy and Riley Exploration Permian. Historic operators that grew from Spindletop include Texaco (now Chevron), Gulf Oil (now Chevron), Humble Oil (now ExxonMobil), and Sun Oil (Sunoco predecessor).

## Page Outline
- Spindletop / Gladys City Unit Operators List — 2026
  - A Concentrated, Mature Operator Base
  - Notable Operators
  - Historic Operators
  - Key Takeaways
  - Ready to Sell Your Mineral Rights?

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**Operator directory:** https://www.buckheadenergy.com/operators