Black Hills Corporation
A utility company headquartered in Rapid City, South Dakota, delivering regulated electricity and natural gas across eight US states. Its roots reach back to 1883, when the Black Hills Electric Light Company lit up Deadwood during the gold rush, and the modern firm took shape in 1941 under new federal law. Named for the Black Hills region, it even runs its own coal mine to fuel nearby power plants.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.