Kanning Jolyn M. 4

What Happened

• Jolyn M. Kanning, Chief Risk Officer of First Interstate Bancsystem, was granted 2,247 restricted stock units (RSUs) on June 1, 2026. The grant is recorded at $0.00 per share (award), so no cash was exchanged in this transaction.
• These RSUs were issued under the Registrant's 2023 Equity and Incentive Plan and will convert into shares upon vesting; the filing reports the acquisition as an award rather than a purchase or sale.

Key Details

• Transaction date: 2026-06-01; Form 4 filed: 2026-06-03 (appears timely).
• Transaction type/code: Award/Grant (A); shares granted: 2,247; reported price: $0.00; reported acquisition value: $0.
• Shares owned after transaction: not disclosed in this filing.
• Footnote: RSUs vest on June 1, 2029 and are subject to continued employment through the vesting date (per the Registrant's 2023 Equity and Incentive Plan).
• No 10b5-1 plan, tax withholding, or immediate sale reported in this filing.

Context

• RSU grants are a form of equity compensation that typically convert into common shares at vesting if employment continues. They are compensation-based awards and do not represent an immediate purchase or sale by the insider.
• Such awards are common for executive retention/compensation and do not by themselves indicate a buy or sell signal from the insider.