Lubar & Co. has ownership stakes in a strong portfolio of companies:
- American Pasteurization Co., Milwaukee
- Approach Resources, Fort Worth, Texas
- Crosstex Energy, Dallas, Texas
- Drilltec Inc., Houston, Texas
- Erdman Corp., Madison
- Hallador Energy Co., Denver, Colo.
- Ixonia Bancshares
- Lake Express LLC, Milwaukee
- Milwaukee Brewers Baseball Club
- PetroSantander, Houston, Texas
- Rockland Industrial Products LLC, Red Wing, Minn.
- Shared Imaging, LLC, Streamwood, Ill.
- Star Gas Partners L.P., Jersey City, N.J.
- Zero Zone Inc., North Prairie, Wis.
