Cummins owns Fleetguard..
Caterpillar has one plant that builds their own filters, it is managed by Donaldson (but Donaldson equivalents to Cat are entirely different construction) and Champ supplies few of their filters OEM wise.
Detroit Diesel branded aftermarket filters are or were Fram. OEM filters were AC and sometimes Champ.
Mack was a combination of Fram and Fleetguard.
Deere is Fleetguard and Champ.
CaseIH should be Fleetguard.
Fleetrite ( the Navistar brand) Fleetguard.
Komatsu is probably Taisei Kyogo and SMC.
Kubota US is Champ for oil, fuel, hydraulic..Donaldson for air.
Harley Davidson is Champ but you never asked that one..
These answers are based on when I worked at Champ and it is possible some have changed but I haven't heard if they have.