Utility growth lost one upside spark
- The regulated Electric segment is the anchor, with a $1.9 billion 5-year capital plan aimed at 10% rate base growth.
- The 430 MW large load project was removed, which cuts a clear upside path from the utility growth story.
- Plastics is still a major cash source, but PVC pipe prices fell 19% year over year in Q1 2026.
- Manufacturing is improving after a downturn, helped by better construction and recreational vehicle demand.
- Finn's view is mixed: good financial health, fair valuation, and slower growth after the lost load project.
A utility story with less upside
Otter Tail's main appeal is now clear. The Electric segment is a regulated utility, which means regulators set the prices customers pay and the return the company can earn. Management has a $1.9 billion 5-year capital plan, meant to grow rate base, the assets regulators allow the utility to earn a return on, at a 10% compound annual rate.
The bull case is that Otter Tail can fund much of this utility growth with cash from Plastics while Manufacturing recovers. That matters because it lowers the need to sell new stock, which can dilute current shareholders. Post-2030 transmission projects could add another leg of growth if they move ahead.
The bear case changed in Q1 2026. Management removed a 430 MW large load opportunity from the pipeline because of permitting problems and failed South Dakota tax incentive legislation. That does not break the base plan, but it removes a named upside catalyst. MISO Tranche 2.1 transmission work also faces a FERC complaint, and management said delays are possible.
Rates, pipes, and metal parts
Otter Tail makes money in three ways. Electric sells power to homes and businesses in parts of Minnesota, North Dakota, and South Dakota. Manufacturing sells custom metal fabrication and thermoformed or extruded plastic products. Plastics sells PVC pipe for water, wastewater, and related uses.
The Electric segment is the moat. A regulated utility is a natural monopoly because it is not practical to build competing wires to the same customers. In exchange, regulators decide what Otter Tail can charge and how much return it can earn.
The non-utility businesses add cash and risk. Plastics earned unusually high profits after PVC pipe prices peaked in late 2022, but those prices are normalizing. Manufacturing is more tied to economic cycles, but Q1 2026 showed better demand in construction and recreational vehicle markets.
What the company sells
Regulated electric service
Otter Tail Power generates, transmits, and distributes electricity. This is the core business and the main source of stable earnings.
Utility capital projects
The $1.9 billion 5-year plan includes renewable generation, advanced metering, grid work, and transmission. These projects can grow rate base if regulators allow recovery.
Long-range transmission
MISO Tranche 2.1 and JTIQ projects could extend growth into the 2032 to 2034 period. The 2025 10-K estimated Otter Tail's MISO Tranche 2.1 investment at $800 million to $1.0 billion and JTIQ at $450 million to $500 million after the DOE grant.
BTD Manufacturing
BTD makes custom metal parts and assemblies. Q1 2026 sales improved as construction and recreational vehicle demand recovered.
T.O. Plastics
T.O. Plastics serves markets such as horticulture with extruded and thermoformed plastic products. Demand can soften when customers reduce inventories.
PVC pipe
The Plastics segment sells pipe used in municipal and rural water, wastewater, and water reclamation projects. It is still producing strong cash, but prices are coming down from peak levels.
Q1 revenue mix
The mix uses Q1 2026 operating revenue from the Form 10-Q: Electric $165.9 million, Manufacturing $89.6 million, and Plastics $91.6 million. Plastics remains a large profit contributor even though its revenue and pricing are normalizing.
What could go wrong
Remaining large load projects do not convert
Medium impact · Medium oddsThe removed 430 MW project was a concrete growth opportunity. With it gone, the question is whether any of the other 500 MW in the large load pipeline becomes a signed deal. If not, the utility growth plan has less upside than bulls hoped.
MISO Tranche 2.1 delays
High impact · Medium oddsOtter Tail's long-term bull case includes large transmission investments after 2030. The 2025 10-K flagged opposition from North Dakota officials, and Q1 2026 management said a FERC complaint from several states could cause delays. A long delay would push out future rate base growth.
PVC pipe profits keep normalizing
Medium impact · High oddsPlastics is still generating cash, but Q1 2026 average PVC pipe prices fell 19% from Q1 2025. Volumes rose 7%, helped by an opportunistic specialty pipe sale and customers buying before possible resin cost increases. That demand may not repeat.
PVC pipe antitrust lawsuit
High impact · Medium oddsClass-action complaints name Otter Tail, Northern Pipe Products, Vinyltech, and many other parties. The complaints allege price fixing in the PVC pipe industry. The full cost, timing, and chance of settlement are still open questions.
Coal and rate recovery risk
Medium impact · Medium oddsCoyote Station remains a regulatory and environmental watch item. The Minnesota rate case includes accelerated recovery tied to ending service to Minnesota customers from Coyote Station by December 2031. EPA action on the North Dakota SIP could also affect costs or asset value.