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Northwestern Corporation

dba Northwestern Energy

Butte, MT, 597011711

EIN 46-0172280
Plans
6
Total participants
18,106
Filing years
2024, 2023, 2022, 2021, 2020
NAICS
221100
Plan sponsors in MontanaUtilities

Benefit plans on file

YearFormPlan #Plan nameParticipants
2024Form 5500001Northwestern Energy Sd/Ne Pension Plan104
2024Form 5500101Northwestern Energy Mt Pension Plan309
2024Form 5500103Northwestern Energy 401(K) Retirement Savings Plan1,590
2024Form 5500104Northwestern Energy Master Retirement Trust—
2024Form 5500504Northwestern Corporation Family Protector Benefit Plan—
2024Form 5500530Northwestern Energy Employee Benefit Plan1,580
2023Form 5500001Northwestern Energy Sd/Ne Pension Plan117
2023Form 5500101Northwestern Energy Mt Pension Plan349
2023Form 5500103Northwestern Energy 401(K) Retirement Savings Plan1,571
2023Form 5500104Northwestern Energy Master Retirement Trust—
2023Form 5500504Northwestern Corporation Family Protector Benefit Plan—
2023Form 5500530Northwestern Energy Flexible Compensation Plan1,560
2022Form 5500001Northwestern Corporation Pension Plan131
2022Form 5500101Northwestern Energy Pension Plan391
2022Form 5500103Northwestern Energy 401(K) Retirement Savings Plan1,529
2022Form 5500104Northwestern Energy Master Retirement Trust—
2022Form 5500504Northwestern Corporation Family Protector Benefit Plan—
2022Form 5500530Northwestern Energy Flexible Compensation Plan1,531
2021Form 5500001Northwestern Corporation Pension Plan139
2021Form 5500101Northwestern Energy Pension Plan451
2021Form 5500103Northwestern Energy 401(K) Retirement Savings Plan1,494
2021Form 5500104Northwestern Energy Master Retirement Trust—
2021Form 5500504Northwestern Corporation Family Protector Benefit Plan—
2021Form 5500530Northwestern Energy Flexible Compensation Plan1,504
2020Form 5500001Northwestern Corporation Pension Plan153
2020Form 5500101Northwestern Energy Pension Plan528
2020Form 5500103Northwestern Energy 401(K) Retirement Savings Plan1,538
2020Form 5500104Northwestern Energy Master Retirement Trust—
2020Form 5500504Northwestern Corporation Family Protector Benefit Plan0
2020Form 5500530Northwestern Energy Flexible Compensation Plan1,537

Data shown as filed with the U.S. Department of Labor (EBSA), filing years 2020–2025; not validated by OpenERISA. View official filings for this EIN on the DOL EFAST2 search.

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