NorthWestern Energy LLC - (MT)
11 E. Park Street Butte, MT 59701Company Summary Information
NorthWestern Energy LLC - (MT) is ranked #229 out of 5,337 utilities nationwide in terms of total annual net electricity generation, and they are ranked #21 out of 410 utilities in terms of total annual net electricity generation from hydroelectric conventional.
NorthWestern Energy LLC - (MT) generated 1.1 TWh during the 3-month period between September 2025 to December 2025.
According to FERC EQR data, NorthWestern Energy LLC - (MT) had a total of $9.2M in seller transasctions and $9.3M in buyer transasctions in 2025 Q2.
| Company Name | NorthWestern Energy LLC - (MT) |
|---|---|
| Location | 11 E. Park Street Butte, MT 59701 |
| EIA Utility Type | |Investor-Owned Utility |
| EIA Utility Dates | Jan 2001 to May 2026 |
| EIA Annual Generation | 3.9 TWh |
| EIA Power Plants | 29 |
| Fuel Types | Hydroelectric Conventional Natural Gas Wind Distillate Fuel Oil |
| Ranked #229 out of 5,337 Utilities Nationwide by Annual Generation | |
| Ranked #21 out of 410 Utilities Nationwide in terms of Hydroelectric Conventional Generation | |
FERC Seller Summary
| Seller Dates Available | Jan 2024 to Oct 2025 |
|---|---|
| Seller Total Transaction Charges | $74.54M |
| Seller Total Transactions | 1,691,644 |
| Seller 2025 Q2 Transaction Charges | $9.24M |
| Seller 2025 Q2 Transactions | 228,591 |
FERC Buyer Summary
| Buyer Dates Available | Jul 2013 to Sep 2025 |
|---|---|
| Buyer Total Transaction Charges | $662.24M |
| Buyer Total Transactions | 74,921 |
| Buyer 2025 Q2 Transaction Charges | $9.28M |
| Buyer 2025 Q2 Transactions | 509 |
Map of NorthWestern Energy LLC - (MT) Locations
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Monthly Electricity Generation by Type
Monthly electricity generation by source as reported by the EIA
Monthly FERC Transaction Charges by Type
Monthly aggregates and sums are derived from FERC Electronic Quarterly Reports (EQR)
Power Plants Operated by NorthWestern Energy LLC - (MT)
| Plant | Location | Annual Generation | Initial Operation Date | Last Update | Fuel Types |
|---|---|---|---|---|---|
| Aberdeen CT | Aberdeen, South Dakota | 56 GWh | Apr 1978 | Dec 2025 | Natural Gas |
| Beethoven Wind | Tripp, South Dakota | 282 GWh | Apr 2015 | Dec 2025 | Wind |
| Black Eagle | Great Falls, Montana | 110 GWh | Aug 1927 | Dec 2025 | Water |
| Bob Glanzer Generating Station | Huron, South Dakota | 104 GWh | Mar 2022 | Dec 2024 | Natural Gas |
| Clark (SD) | Clark, South Dakota | -141 MWh | Dec 1969 | Dec 2025 | |
| Cochrane | Great Falls, Montana | 215 GWh | Jun 1958 | Dec 2025 | Water |
| Dave Gates Generating Station | Anaconda, Montana | 421 GWh | Dec 2010 | May 2026 | Natural Gas |
| Faulkton | Faulkton, South Dakota | -161 MWh | Feb 1969 | Dec 2025 | |
| Future CT | Huron, South Dakota | - | - | - | |
| Hauser | Helena, Montana | 128 GWh | Oct 1911 | Dec 2025 | Water |
| Highmore | Highmore, South Dakota | - | Dec 1947 | Jun 2014 | |
| Holter | Wolf Creek, Montana | 248 GWh | Jun 1918 | Dec 2025 | Water |
| Huron | Huron, South Dakota | - | Dec 1960 | Apr 2022 | |
| Lake (WY) | Yellowstone, Wyoming | 96 MWh | Aug 1967 | Dec 2025 | Distillate Fuel Oil |
| Madison Dam | Ennis, Montana | 76 GWh | Aug 1906 | Dec 2025 | Water |
| Milltown | East Missoula, Montana | - | - | Dec 2003 | |
| Mobile Unit | Huron, South Dakota | - | Feb 1991 | Dec 2019 | |
| Morony | Great Falls, Montana | 215 GWh | Dec 1929 | Dec 2025 | Water |
| Mystic | Fishtail, Montana | 52 GWh | Apr 1925 | Dec 2025 | Water |
| Old Faithful | Yellowstone, Wyoming | 203 MWh | Nov 1979 | Dec 2025 | Distillate Fuel Oil |
| Rainbow (MT) | Great Falls, Montana | 299 GWh | Feb 2013 | Dec 2025 | Water |
| Redfield | Redfield, South Dakota | - | Aug 1962 | Jun 2014 | |
| Ryan | Great Falls, Montana | 377 GWh | Jul 1915 | Dec 2025 | Water |
| Spion Kop Wind Farm | Geyser, Montana | 98 GWh | Nov 2012 | Dec 2025 | Wind |
| Thompson Falls | Thompson Falls, Montana | 440 GWh | Jun 1915 | Dec 2025 | Water |
| Two Dot Wind Farm | Two Dot, Montana | 29 GWh | May 2014 | Dec 2025 | Wind |
| Webster IC | Webster, South Dakota | - | - | Jul 2003 | |
| Yankton | Yankton, South Dakota | -52 MWh | Jan 1963 | Dec 2025 | |
| Yellowstone County Generating Station | Laurel, Montana | 400 GWh | Jun 2024 | May 2026 | Natural Gas |
Other Companies Listed Alphabetically
A list of companies close to NorthWestern Energy LLC - (MT) when arranged alphabetically. They do not neccessarily have any association with NorthWestern Energy LLC - (MT).
| Company Name | Company Location | EIA Annual Generation | FERC 2025 Q2 Transactions |
|---|---|---|---|
| Northfield Community Solar | Scottsdale, AZ | 8.6 GWh | - |
| Northfield Holdco LLC | Princeton, NJ | 8.6 GWh | - |
| Northfield Mountain LLC | Burlington, MA | - | $23.90M |
| Northlake Energy | East Chicago, IN | 704.1 GWh | - |
| Northstar Clean Energy | Jackson, MI | 319.7 GWh | - |
| Northstar MACY's Maryland 2015, LLC | Scottsdale, AZ | 3.2 GWh | - |
| Northumberland Solar, LLC | Arlington, VA | 65.9 GWh | - |
| Northwest Community Hospital | Arlington Heights, IL | 1.1 GWh | - |
| Northwest Ohio Wind, LLC | Haviland, OH | 324.9 GWh | $2.84M |
| Northwestern Corporation | Helena, MT | - | $30.07M |
| Norton Powerhouse 2 | Worcester, MA | 31.2 GWh | - |
| Norwest Energy 7, LLC | Charlotte, NC | 18.4 GWh | - |
| Nostrand Solar, LLC | San Francisco, CA | 4.6 GWh | - |
| Notus Clean Energy LLC | E. Falmouth, MA | 5.4 GWh | - |
| Nova Power, LLC | Houston, TX | -144.4 GWh | $29.54M |
| Novis Renewables, LLC | Irvington, NY | 292.2 GWh | - |
| Novo Biopower LLC | Snowflake, AZ | 216.7 GWh | $6.43M |
| NRG Business Marketing LLC | Princeton, NJ | - | $681.95M |
| NRG California Peaker Operations LLC | Carlsbad, CA | 216.0 GWh | - |
| NRG Cedar Bayou Development Company LLC | Houston, TX | 2.4 TWh | - |
Top 20 Companies Associated with NorthWestern Energy LLC - (MT)
A list of the top 20 companies associated with NorthWestern Energy LLC - (MT) in terms of total FERC EQR transactions charges. Total Transaction Charges are based on FERC EQR data obtained since Q3 2013.
| Company Name | 2025 Q2 Transactions w/ NorthWestern Energy LLC - (MT) |
|---|---|
| Southwest Power Pool, Inc. | $9.24M |
| Judith Gap Energy LLC | $2.11M |
| Basin Creek Equity Partners, L.L.C. | $1.99M |
| Stillwater Wind, LLC | $1.71M |
| Rolling Thunder I Power Partners, LLC | $1.41M |
| South Peak Wind LLC | $1.06M |
| Nextera Energy Marketing, LLC | $250.00k |
| Puget Sound Energy, Inc. | $199.03k |
| Avista Corporation | $188.88k |
| Guzman Energy, LLC | $117.05k |
| Avangrid Power, LLC | $86.16k |
| Rainbow Energy Marketing Corporation | $43.20k |
| Dynasty Power Inc. | $34.59k |
| Idaho Power Company | $23.75k |
| Transalta Energy Marketing Corp. | $20.89k |
| Seattle City Light | $18.67k |
| Conocophillips Company | $17.45k |
| Phillips 66 Energy Trading LLC | $3.50k |
| Heartland Generation Ltd. | $1.76k |
| Public Utility District No. 2 Of Grant County | $81.20 |
The 20 Most Recent FERC EQR Transactions
Displaying Results 1 to 20 of 1,868,098 ( 0.416s )| Seller Name | Buyer Name | Product | Transaction Group Ref # | Begin Date | End Date | Trade Date | Quantity | Price | Units | Transmission Charge | Transaction Charge | FERC Tariff Ref | Contract Service Agreement | Contract Filing Type | Contract Execution Date | Contract Commencement Date | Contract Termination Date | Timezone | Balancing Authority | Point of Delivery Hub | Class | Term | Increment | Increment Peaking | Filing Type | Broker Exchange |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NorthWestern Energy Public Service Corporation | SOUTHWEST POWER POOL | ENERGY | RTAEN0000000000000925450 | 2025-09-30 23:55 | 2025-10-01 00:00 | 2025-09-30 | 0.028 | $-11.6081 | $/MWH | $0.00 | $0.33 | NWPS Market Based Rate Tariff, 2.0.0 | SA FIRST REVISED 3099 (SPP) | New | 2024-01-01 | 2024-01-01 | CentralDaylight2 | SWPP | WAUE.NWPS.OTE | Firm | ShortTerm | FiveMinute | OffPeak | New | ||
| NorthWestern Energy Public Service Corporation | SOUTHWEST POWER POOL | ENERGY | DAAEN0000000000000925318 | 2025-09-30 23:00 | 2025-10-01 00:00 | 2025-09-29 | 18.6 | $-17.0667 | $/MWH | $0.00 | $-317.44 | NWPS Market Based Rate Tariff, 2.0.0 | SA FIRST REVISED 3099 (SPP) | New | 2024-01-01 | 2024-01-01 | CentralDaylight2 | SWPP | WAUE.NWPS.AUR | Firm | ShortTerm | Hourly | OffPeak | New | ||
| NorthWestern Energy Public Service Corporation | SOUTHWEST POWER POOL | ENERGY | DAAEN0000000000000092515 | 2025-09-30 23:00 | 2025-10-01 00:00 | 2025-09-29 | 18.6 | $-17.0667 | $/MWH | $0.00 | $-317.44 | NWPS Market Based Rate Tariff, 2.0.0 | SA FIRST REVISED 3099 (SPP) | New | 2024-01-01 | 2024-01-01 | CentralDaylight2 | SWPP | WAUE.NWPS.BRUL | Firm | ShortTerm | Hourly | OffPeak | New | ||
| NorthWestern Energy Public Service Corporation | SOUTHWEST POWER POOL | OTHER | RTRPU0000000000009251468 | 2025-09-30 23:55 | 2025-10-01 00:00 | 2025-09-30 | 0.289 | $0.00 | $/MWH | $0.00 | $0.00 | NWPS Market Based Rate Tariff, 2.0.0 | SA FIRST REVISED 3099 (SPP) | New | 2024-01-01 | 2024-01-01 | CentralDaylight2 | SWPP | WAUE.NWPS.NEAL4 | Firm | ShortTerm | FiveMinute | OffPeak | New | ||
NorthWestern Energy LLC - (MT) Name and Address Permutations
Due to the nature of the data we have to make some assumptions when determining if two companies are the same. So to be transparent about how we're calculating some of the summary values, here are all the company names and addresses that were combined to create this record. While we try to make sure everything is as accurate as possible we can't guarantee complete accuracy for all records.
| Company Name | Company Address |
|---|---|
| NorthWestern Energy LLC - (MT) | 11 East Park Butte, MT 59701 |
| NorthWestern Energy (MT Hydro) | 11 E. Park Street Butte, MT 59701 |
| NorthWestern Energy (MT wind/thermal) | 40 E Broadway Butte, MT 59701 |
| NorthWestern Energy Public Service Corporation | 208 N Montana Ave Helena, MT 59601 |
| NorthWestern Energy - (SD) | 3010 West 69TH Street Sioux Falls, SD 57108 |