It's a common myth that Cummins is owned by auto manufacturers like Ford or Chrysler. In fact, Cummins Turbo Technologies is an independent company that manufactures and markets a complete line of diesel and natural gas-powered engines.

But exactly what does Cummins do? At a high level, we create power solutions. You'll find Cummins products and solutions for on- and off-highway engines, turbochargers, electronics, fuel systems, generators and power systems, and more.

Cummins engines are known for their power, reliability and durability, and are frequently found in hard-working commercial vehicles. The current incarnation is the Cummins 6.7L Turbo Diesel.

Cummins stock is falling after fourth-quarter earnings fell short of Wall Street expectations. Guidance for 2024 isn't helping shares of the engine maker, either. Tuesday morning, Cummins reported adjusted earnings per share of $4.14 on sales of $8.5 billion.