401(k) · DOL Form 5500 · 2023

First Interstate Bancsystem, Inc. 401(k) Plan

Data updated 2026-08-25

$454M
Total assets Above avg plan size
3,750
Participants Above avg headcount
97th
Percentile by assets National rank
$120,965
Avg per participant Near avg balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: First Interstate Bancsystem, Inc. 401(k) Plan · Sponsored by First Interstate Bancsystem, Inc. · Montana · Finance & Insurance

$454M in assets, 3,750 participants

First Interstate Bancsystem, Inc.'s First Interstate Bancsystem, Inc. 401(k) Plan reported $454M in total assets and 3,750 participants in its 2023 DOL Form 5500 filing, ranking in the 97th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #8,442 in Finance & Insurance (8,869 peers)

Coverage in Montana

First Interstate Bancsystem, Inc. 401(k) Plan covers 3,750 participants in Montana, 14x the typical Montana plan (state average ~271 per filing). Assets: $454M.

#8,442
in Finance & Insurance (8,869 peers)
+6.5%
assets growth YoY
4.6×
vs typical plan assets (national mean)

First Interstate Bancsystem, Inc. 401(k) Plan's outsized position by total assets

First Interstate Bancsystem, Inc. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$453,618,257 Top 3% higher than 97% of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

First Interstate Bancsystem, Inc. 401(k) Plan's large-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. First Interstate Bancsystem, Inc. 401(k) Plan lands in the large band (3,750 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • First Interstate Bancsystem, Inc. 401(k) Plan reported net income rose from -$99M in the plan year 2022 filing to $28M in the plan year 2023 filing.
  • First Interstate Bancsystem, Inc. 401(k) Plan reported participants rose from 2,313 in the plan year 2022 filing to 3,750 in the plan year 2023 filing.
  • First Interstate Bancsystem, Inc. 401(k) Plan end-of-year assets rose from $426M in the plan year 2022 filing to $454M in the plan year 2023 filing.

See the national 2022→2023 release diff →

Published 5500 schedule card

Filing strip 810331430 · First Interstate Bancsystem, Inc. PY 2023 · 401(k)

First Interstate Bancsystem, Inc. 401(k) Plan · $454M · 3,750 · 97th

  • EOY $454M
  • EOY 3,750
  • EOY 97th
  • EOY 401(k)
  • EOY near Acipco 401(k) Plan
  • EOY ind #8442

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Finance & Insurance retirement plans → · Plans in Montana →

First Interstate Bancsystem, Inc. 401(k) Plan in the asset neighbourhood

Capital Blue Cross Employee Savings PlanCapital Blue Cross Employee …$454MPegasystems Inc. 401(k) Plan$454MAcipco 401(k) Plan$454MFirst Interstate Bancsystem, Inc. 401(k) PlanFirst Interstate Bancsystem,…$454MSpotify USA Inc. 401(k) Profit Sharing Plan and TrustSpotify USA Inc. 401(k) Prof…$453M
End-of-year total assets ($M) among First Interstate Bancsystem, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Montana filing particulars

Total Assets (Beginning of Year)$426M
Net Assets (End of Year)$454M
Net Income$28M
Employer EIN810331430
Plan Effective Date1983-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (First Interstate Bancsystem, Inc.)

Sponsor-wide plan assets over time

All First Interstate Bancsystem, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$482M 13.140499151159531% vs 2022
2024 filing year
$420M$440M$460M$480M$500M 202220232024 $426M $482M ▲ +13.1%
Year Plans Participants Total Assets
2022 1 2,313 $426M
2023 1 3,750 $454M
2024 1 3,530 $482M

Nearby 401(k) Plans in Montana

Peer 401(k) plans, same state, same plan type, ranked by total assets.

First Interstate Bancsystem, Inc. 401(k) Plan vs. nearby 401(k) plans in Montana, assets vs. participants Scatter plot of 6 data points. 10002000300040005000 400450500550 Total assets ($M) Participants First Interstate Bancsystem, Inc. 401(k) Plan, Total assets ($M): 453.618257 · Participants: 3750First Interstate Bancsystem, Inc. 401(k) PlanD.a. Davidson Companies Retirement Savings and Profit Sharing Plan, Total assets ($M): 543.142005 · Participants: 1580D.a. Davidson Companies Retirement Savings and Profit Sharing PlanGlacier Bancorp, Inc. Profit Sharing and 401(k) Plan, Total assets ($M): 484.798151 · Participants: 3264Glacier Bancorp, Inc. Profit Sharing and 401(k) PlanNorthwestern Energy 401(k) Retirement Savings Plan, Total assets ($M): 462.756735 · Participants: 1529Northwestern Energy 401(k) Retirement Savings PlanLogan Health Retirement Savings Plan, Total assets ($M): 436.597451 · Participants: 4232Logan Health Retirement Savings PlanWashington Companies 401(k) Retirement Savings Plan, Total assets ($M): 417.849493 · Participants: 2114Washington Companies 401(k) Retirement Savings Plan
First Interstate Bancsystem, Inc. 401(k) Plan vs. nearby 401(k) plans in Montana, assets vs. participants
Compare First Interstate Bancsystem, Inc. 401(k) Plan side-by-side with 3 peers →

First Interstate Bancsystem, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Montana, the nearest 401(k) by assets is Acipco 401(k) Plan in AL ($454M); by covered participants it is Firstfleet, Inc. 401(k) Plan in TN (3,750 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($454M here).

Similar participant headcount

Nearest other-state filings by covered participants (3,750 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did First Interstate Bancsystem, Inc. 401(k) Plan assets move in 2023? ▼
First Interstate Bancsystem, Inc. 401(k) Plan grew at a solid clip - up 6.5% during 2023, from $426M to $454M. Reported net income was $28M.
How have First Interstate Bancsystem, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), First Interstate Bancsystem, Inc.'s sponsor-wide assets grew 13.1%, from $426M to $482M.
Where does First Interstate Bancsystem, Inc. 401(k) Plan rank by assets among Form 5500 filers? ▼
First Interstate Bancsystem, Inc. 401(k) Plan ranks in the 97th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to First Interstate Bancsystem, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Acipco 401(k) Plan in AL ($454M, 2,473 participants).
Which 401(k) plans cover a similar participant headcount to First Interstate Bancsystem, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Firstfleet, Inc. 401(k) Plan in TN (3,750 participants, $44M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 810331430.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.