SCHEDULE: Vanguard Group Maintains 10% Stake in First Interstate BancSystem

The Vanguard Group reported an ongoing 10% beneficial ownership in First Interstate BancSystem Inc. common stock, following an internal realignment affecting its reporting structure.

Summary

• The Vanguard Group reported beneficial ownership of 10,119,518 shares of First Interstate BancSystem Inc. common stock.
• This represents 10% of the class of securities.
• The filing is an Amendment No. 9 to a Schedule 13G, with the event date being February 27, 2026.
• The Vanguard Group holds shared voting power over 698,080 shares and shared dispositive power over all 10,119,518 shares.
• An internal realignment occurred at The Vanguard Group, Inc. on January 12, 2026, where it ceased performing portfolio management services and proxy voting.
• As a result of the realignment, certain Vanguard subsidiaries or business divisions are expected to report beneficial ownership separately (on a disaggregated basis) in the future.

Sentiment

Score: 6

Explanation: StockSavvy.ai views this filing as mildly positive due to the continued significant institutional ownership by The Vanguard Group, which can signal stability. The internal realignment at Vanguard is a procedural change with no direct positive or negative implications for the issuer's performance.

Positives

• The Vanguard Group, a major institutional investor, maintains a significant 10% beneficial ownership stake in First Interstate BancSystem Inc., indicating continued institutional confidence.

Management Comments

• I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under 240.14a-11.

Industry Context

StockSavvy.ai notes that the continued significant stake by The Vanguard Group in First Interstate BancSystem Inc. reflects ongoing institutional interest in the regional banking sector. The internal realignment at Vanguard, leading to disaggregated reporting, is a procedural shift common among large asset managers to streamline compliance and operational structures, rather than an indication of a change in investment strategy towards the issuer.

Comparison to Industry Standards

• This filing primarily details a beneficial ownership stake and does not provide performance metrics for comparison. StockSavvy.ai observes that a 10% stake by a major passive fund manager like Vanguard is a standard occurrence for publicly traded companies, reflecting their broad market index tracking strategies rather than specific company outperformance or underperformance against peers like U.S. Bancorp or Wells Fargo.

Stakeholder Impact

• Shareholders: Provides transparency regarding a significant institutional holder's stake and reporting structure.

Next Steps

• Certain subsidiaries or business divisions of The Vanguard Group, Inc. are anticipated to report beneficial ownership separately (on a disaggregated basis) from The Vanguard Group, Inc. in reliance on SEC Release No. 34-39538.

Key Dates

Keywords

First Interstate BancSystem Inc., Vanguard Group, Beneficial Ownership, Schedule 13G, Common Stock, Institutional Investor, Shareholding, Financial Services, Banking