DCI vs ALSN Comparison

Donaldson is a leading manufacturer of filtration systems and replacement parts (including air filtration systems, liquid filtration systems, and dust, fume, and mist collectors). The company serves a diverse range of end markets, including construction, mining, agriculture, truck, and industrial. Its business is organized into three segments: mobile solutions, industrial solutions, and life sciences. Donaldson generated approximately $3.7 billion in revenue in its fiscal 2025.

Allison Transmission is the largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles. The company's automatic transmissions allow customers to achieve better fuel and operator efficiency than less expensive manual and automated manual transmissions. Allison serves several end markets, including on- and off-highway equipment and military vehicles. Its on-highway business commands approximately 60% global market share. The company's transmissions can be found in class 4 through 8 trucks, buses, and a limited number of large passenger vehicles (heavy-duty pickup trucks and motorhomes). Allison also produces commercial hybrid propulsion systems and is developing fully electric powertrains.