Tapewire

Nasdaq · USD

FIBK

FIRST INTERSTATE BANCSYSTEM INC

Export transactions ↓
Tapewire entity
4141
SEC CIK
0000860413
Parsed reports
807

Last 12 months

Inside the activity.

0 purchase rows · 20 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
Monthly counts
MonthPurchasesSales
Nov 202505
Dec 202501
Jan 202602
Feb 202600
Mar 202601
Apr 202601
May 202600
Jun 202606
Jul 202601
Aug 202600
Sep 202603
Oct 202600

Latest available

Insider transactions

JSON API
Reset

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
October 05, 2026 Filed Oct 6, 2026 16:43 UTC
SCOTT JAMES R10% owner
GiftCommon Stock 6,990 $0.00 $0.00
Disclosure

SEC source: 0001493152-26-045898 · ownership.xml · nonDerivative · entry 1

SCOTT JAMES R · CIK 0001198533 · 10% owner

James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs · CIK 0001908712 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 2,038,296

F1 · ownership.nature: Composed of 1,982,892 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 14,534 shares held of record by James R Scott's 401(k) plan, and 40,870 shares held of record by James R. Scott's spouse.

F2 · ownership.nature: As a result of agreements entered into among the reporting persons, the issuer, and other stockholders of the issuer signatory thereto, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported therein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of his or its pecuniary interest therein. The reporting persons expect to file future Forms 4 or 5, if any, together with James R. Scott with the indication of direct or indirect ownership in Tables I and II being made from James R. Scott's perspective, unless expressly noted otherwise by footnote.

Read SEC document
September 16, 2026 Filed Sep 16, 2026 23:04 UTC
SCOTT JULIE A10% owner
SaleCommon Stock 2,700 $37.64 $101,628.00
Disclosure

SEC source: 0001493152-26-042992 · ownership.xml · nonDerivative · entry 1

SCOTT JULIE A · CIK 0001234619 · 10% owner

Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002 · CIK 0001908851 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Juliana Sarah Scott Rose Trust · CIK 0001909078 · 10% owner

Elizabeth Lauren Scott Rose Trust · CIK 0001908961 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 484,309

F1 · ownership.nature: Composed of 204,166 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02 (which trust effected the reported sale), 35,233 shares held of record by Juliana Sarah Scott Rose Trust, 35,232 shares held of record by Elizabeth Lauren Scott Rose Trust, and 209,678 shares held by IXL Limited Liability Company, over which Ms. Rose has shared voting and dispositive power with a sibling.

F2 · ownership.nature: As a result of certain agreements entered into among the reporting persons, the Issuer, and other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. The reporting persons disclaim beneficial ownership of any such securities, except to the extent of their pecuniary interests therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Julie Scott Rose with the indication of direct or indirect ownership in Table I and Table II being made from Julie Scott Rose's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
September 14, 2026 Filed Sep 16, 2026 17:16 UTC
Lee Jeffery D.Chief Operations Officer
GrantCommon Stock 5,417 $0.00 $0.00
Disclosure

SEC source: 0002154828-26-000005 · wk-form4_1789578965.xml · nonDerivative · entry 1

Lee Jeffery D. · CIK 0002154828 · Chief Operations Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,417

F1 · price: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on September 14, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
September 14, 2026 Filed Sep 14, 2026 23:21 UTC SaleCommon Stock 8,071 $37.29 $300,967.59
Disclosure

SEC source: 0001493152-26-042633 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 817,738

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.10 to $37.44. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 453,200 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 sharesheld of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
September 11, 2026 Filed Sep 14, 2026 17:31 UTC SaleCommon Stock 16,929 $37.03 $626,880.87
Disclosure

SEC source: 0001493152-26-042536 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 825,809

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.00 to $37.23. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 461,271 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 sharesheld of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
September 10, 2026 Filed Sep 22, 2026 22:21 UTC
Shepler Christopher L.Chief Banking Officer
Tax withholdingCommon Stock 222 $36.88 $8,187.36
Disclosure

SEC source: 0002090710-26-000006 · wk-form4_1790115658.xml · nonDerivative · entry 1

Shepler Christopher L. · CIK 0002090710 · Chief Banking Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,018

F1 · price: Disposition to the issuer of issuer securities in payment of minimum required withholding taxes due upon vesting of unvested shares.

Read SEC document
July 27, 2026 Filed Jul 28, 2026 22:34 UTC
SCOTT JULIE A10% owner
GiftCommon Stock 1,350 $0.00 $0.00
Disclosure

SEC source: 0001493152-26-035055 · ownership.xml · nonDerivative · entry 1

SCOTT JULIE A · CIK 0001234619 · 10% owner

Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002 · CIK 0001908851 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Juliana Sarah Scott Rose Trust · CIK 0001909078 · 10% owner

Elizabeth Lauren Scott Rose Trust · CIK 0001908961 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 487,009

F1 · ownership.nature: Composed of 206,866 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 35,233 shares held of record by Juliana Sarah Scott Rose Trust, 35,232 shares held of record by Elizabeth Lauren Scott Rose Trust, and 209,678 shares held by IXL Limited Liability Company, over which Ms. Rose has shared voting and dispositive power with a sibling.

F2 · ownership.nature: As a result of certain agreements entered into among the reporting persons, the Issuer, and other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. The reporting persons disclaim beneficial ownership of any such securities, except to the extent of their pecuniary interests therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Julie Scott Rose with the indication of direct or indirect ownership in Table I and Table II being made from Julie Scott Rose's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
July 22, 2026 Filed Jul 24, 2026 22:31 UTC GrantCommon Stock 1,806 $38.97 $70,379.82
Disclosure

SEC source: 0002146309-26-000004 · wk-form4_1784932270.xml · nonDerivative · entry 1

Ritter Matthew John · CIK 0002146309 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,806

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the vesting date.

Read SEC document
July 22, 2026 Filed Jul 24, 2026 22:30 UTC GrantCommon Stock 1,806 $38.97 $70,379.82
Disclosure

SEC source: 0001196952-26-000004 · wk-form4_1784932226.xml · nonDerivative · entry 1

TURNER BRIAN KEVIN · CIK 0001196952 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,806

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the vesting date.

Read SEC document
July 16, 2026 Filed Jul 16, 2026 23:01 UTC SaleCommon Stock 10,000 $40.30 $403,000.00
Disclosure

SEC source: 0001493152-26-033609 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 842,738

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.12 to $40.57. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 478,200 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 sharesheld of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
June 18, 2026 Filed Jun 18, 2026 21:51 UTC
SCOTT JULIE A10% owner
SaleCommon Stock 5,000 $35.97 $179,850.00
Disclosure

SEC source: 0001493152-26-029403 · ownership.xml · nonDerivative · entry 3

SCOTT JULIE A · CIK 0001234619 · 10% owner

Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002 · CIK 0001908851 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Juliana Sarah Scott Rose Trust · CIK 0001909078 · 10% owner

Elizabeth Lauren Scott Rose Trust · CIK 0001908961 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 488,359

F3 · ownership.nature: Composed of 208,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 35,233 shares held of record by Juliana Sarah Scott Rose Trust, 35,232 shares held of record by Elizabeth Lauren Scott Rose Trust, and 209,678 shares held by IXL Limited Liability Company, over which Ms. Rose has shared voting and dispositive power with a sibling.

F4 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Julie Scott Rose with the indication of direct or indirect ownership in Table I and Table II being made from Julie Scott Rose's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
June 18, 2026 Filed Jun 18, 2026 21:51 UTC
SCOTT JULIE A10% owner
SaleCommon Stock 5,000 $35.98 $179,900.00
Disclosure

SEC source: 0001493152-26-029403 · ownership.xml · nonDerivative · entry 2

SCOTT JULIE A · CIK 0001234619 · 10% owner

Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002 · CIK 0001908851 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Juliana Sarah Scott Rose Trust · CIK 0001909078 · 10% owner

Elizabeth Lauren Scott Rose Trust · CIK 0001908961 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 493,359

F2 · ownership.nature: Composed of 213,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 35,233 shares held of record by Juliana Sarah Scott Rose Trust, 35,232 shares held of record by Elizabeth Lauren Scott Rose Trust, and 209,678 shares held by IXL Limited Liability Company, over which Ms. Rose has shared voting and dispositive power with a sibling.

F4 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Julie Scott Rose with the indication of direct or indirect ownership in Table I and Table II being made from Julie Scott Rose's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
June 18, 2026 Filed Jun 18, 2026 21:51 UTC
SCOTT JULIE A10% owner
SaleCommon Stock 5,000 $35.95 $179,750.00
Disclosure

SEC source: 0001493152-26-029403 · ownership.xml · nonDerivative · entry 1

SCOTT JULIE A · CIK 0001234619 · 10% owner

Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002 · CIK 0001908851 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Juliana Sarah Scott Rose Trust · CIK 0001909078 · 10% owner

Elizabeth Lauren Scott Rose Trust · CIK 0001908961 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 498,359

F1 · ownership.nature: Composed of 218,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 35,233 shares held of record by Juliana Sarah Scott Rose Trust, 35,232 shares held of record by Elizabeth Lauren Scott Rose Trust, and 209,678 shares held by IXL Limited Liability Company, over which Ms. Rose has shared voting and dispositive power with a sibling.

F4 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Julie Scott Rose with the indication of direct or indirect ownership in Table I and Table II being made from Julie Scott Rose's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
June 18, 2026 Filed Jun 18, 2026 19:46 UTC SaleCommon Stock 9,390 $36.11 $339,072.90
Disclosure

SEC source: 0001493152-26-029300 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 852,738

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.00 to $36.33. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 488,200 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 sharesheld of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
June 17, 2026 Filed Jun 18, 2026 14:23 UTC SaleCommon Stock 4,500 $36.29 $163,305.00
Disclosure

SEC source: 0001493152-26-029217 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 862,128

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.01 to $36.45. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 497,590 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 shares held of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
June 04, 2026 Filed Jun 4, 2026 22:41 UTC SaleCommon Stock 12,892 $35.58 $458,697.36
Disclosure

SEC source: 0001493152-26-027328 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 866,628

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.43 to $35.74. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 502,090 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 shares held of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:50 UTC GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0001199246-26-000002 · wk-form4_1780509006.xml · nonDerivative · entry 1

SCUDDER MICHAEL L · CIK 0001199246 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,126

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting persons provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Meyer LoriEVP, Chief Information Officer
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0002003084-26-000006 · wk-form4_1780508994.xml · nonDerivative · entry 1

Meyer Lori · CIK 0002003084 · EVP, Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,517

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vests on June 1, 2029, subject to the reporting person's continued employment through the vesting date.

F2 · balance_after: The number of shares reported herein reflects a correction to the reporting persons beneficial ownership. A Form 4 filed on March 18, 2026 incorrectly reported that 1,550 shares of common stock were withheld to satisfy tax withholding obligations upon vesting of a previously reported restricted stock award. The correct number of shares withheld for such purpose was 813.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:50 UTC
Shepler Christopher L.Chief Banking Officer
GrantCommon Stock 3,370 $0.00 $0.00
Disclosure

SEC source: 0002090710-26-000004 · wk-form4_1780509000.xml · nonDerivative · entry 1

Shepler Christopher L. · CIK 0002090710 · Chief Banking Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,240

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vests on June 1, 2029, subject to the reporting person's continued employment through the vesting date.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Cho Alice SDirector
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0001812520-26-000003 · wk-form4_1780508989.xml · nonDerivative · entry 1

Cho Alice S · CIK 0001812520 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,792

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0001572624-26-000002 · wk-form4_1780508984.xml · nonDerivative · entry 1

Johnson Dennis L · CIK 0001572624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,455

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Boschee Ryan J.Chief Credit Officer
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0002129338-26-000007 · wk-form4_1780508980.xml · nonDerivative · entry 1

Boschee Ryan J. · CIK 0002129338 · Chief Credit Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,777

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vests on June 1, 2029, subject to the reporting person's continued employment through the vesting date.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Kanning Jolyn M.Chief Risk Officer
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0002129553-26-000006 · wk-form4_1780508967.xml · nonDerivative · entry 1

Kanning Jolyn M. · CIK 0002129553 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,885

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vests on June 1, 2029, subject to the reporting person's continued employment through the vesting date.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Della Camera DavidChief Financial Officer
GrantCommon Stock 3,370 $0.00 $0.00
Disclosure

SEC source: 0002071416-26-000006 · wk-form4_1780508974.xml · nonDerivative · entry 1

Della Camera David · CIK 0002071416 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,048

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vests on June 1, 2029, subject to the reporting person's continued employment through the vesting date.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0001284209-26-000002 · wk-form4_1780508963.xml · nonDerivative · entry 1

RYKHUS DANIEL A · CIK 0001284209 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,357

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0001594614-26-000002 · wk-form4_1780508956.xml · nonDerivative · entry 1

Phillips Joyce Ann · CIK 0001594614 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,599

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Agrawal RenuDirector
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0001838577-26-000007 · wk-form4_1780508946.xml · nonDerivative · entry 1

Agrawal Renu · CIK 0001838577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,074

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Bowman BiffDirector
GrantCommon Stock 4,353 $0.00 $0.00
Disclosure

SEC source: 0001548048-26-000002 · wk-form4_1780508952.xml · nonDerivative · entry 1

Bowman Biff · CIK 0001548048 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,035

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:49 UTC
Jensen Kirk DGeneral Counsel
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0001697127-26-000007 · wk-form4_1780508940.xml · nonDerivative · entry 1

Jensen Kirk D · CIK 0001697127 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,978

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vests on June 1, 2029, subject to the reporting person's continued employment through the vesting date.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:46 UTC
Scott JeremyDirector · 10% owner
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0000860413-26-000069 · wk-form4_1780508796.xml · nonDerivative · entry 1

Scott Jeremy · CIK 0001803925 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,743

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:45 UTC
HEYNEMAN JOHN M JRDirector · 10% owner
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0000860413-26-000055 · wk-form4_1780508721.xml · nonDerivative · entry 1

HEYNEMAN JOHN M JR · CIK 0001198518 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,471

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 17:45 UTC
Scott James R. JrDirector · 10% owner
GrantCommon Stock 2,247 $0.00 $0.00
Disclosure

SEC source: 0000860413-26-000052 · wk-form4_1780508706.xml · nonDerivative · entry 1

Scott James R. Jr · CIK 0001675872 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,792

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Read SEC document
April 30, 2026 Filed May 1, 2026 18:58 UTC SaleCommon Stock 53,504 $35.42 $1,895,111.68
Disclosure

SEC source: 0001493152-26-020876 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 879,520

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.13 to $35.70. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 514,982 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 shares held of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
March 26, 2026 Filed Mar 27, 2026 17:02 UTC SaleCommon Stock 3,000 $33.45 $100,350.00
Disclosure

SEC source: 0001493152-26-013130 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 933,024

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.31 to $33.55. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F2 · ownership.nature: Composed of 568,486 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 shares held of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
March 16, 2026 Filed Mar 18, 2026 22:08 UTC
Della Camera DavidChief Financial Officer
Tax withholdingCommon Stock 1,307 $33.22 $43,418.54
Disclosure

SEC source: 0002071416-26-000004 · wk-form4_1773871719.xml · nonDerivative · entry 1

Della Camera David · CIK 0002071416 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,678

F1 · shares: Number of shares of common stock withheld to satisfy the reporting person's tax withholding obligations upon vesting of a previously reported restricted stock unit award.

Read SEC document
March 16, 2026 Filed Mar 18, 2026 22:07 UTC
Jensen Kirk DGeneral Counsel
Tax withholdingCommon Stock 1,375 $33.22 $45,677.50
Disclosure

SEC source: 0001697127-26-000005 · wk-form4_1773871633.xml · nonDerivative · entry 1

Jensen Kirk D · CIK 0001697127 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,731

F1 · shares: Number of shares of common stock withheld to satisfy the reporting person's tax withholding obligations upon vesting of a previously reported restricted stock unit award.

Read SEC document
March 16, 2026 Filed Mar 18, 2026 22:06 UTC
Reuter James ADirector · President and CEO
Tax withholdingCommon Stock 5,125 $33.22 $170,252.50
Disclosure

SEC source: 0002042435-26-000004 · wk-form4_1773871598.xml · nonDerivative · entry 1

Reuter James A · CIK 0002042435 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 86,904

F1 · shares: Number of shares of common stock withheld to satisfy the reporting person's tax withholding obligations upon vesting of a previously reported restricted stock unit award.

Read SEC document
March 16, 2026 Filed Mar 18, 2026 22:04 UTC
Meyer LoriEVP, Chief Information Officer
Tax withholdingCommon Stock 1,550 $33.22 $51,491.00
Disclosure

SEC source: 0002003084-26-000004 · wk-form4_1773871470.xml · nonDerivative · entry 1

Meyer Lori · CIK 0002003084 · EVP, Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,270

F1 · shares: Number of shares of common stock withheld to satisfy the reporting person's tax withholding obligations upon vesting of a previously reported restricted stock unit award.

Read SEC document
March 16, 2026 Filed Mar 18, 2026 22:05 UTC
Robbins KristinaEVP, Chief Operations Officer
Tax withholdingCommon Stock 1,241 $33.22 $41,226.02
Disclosure

SEC source: 0001930719-26-000004 · wk-form4_1773871539.xml · nonDerivative · entry 1

Robbins Kristina · CIK 0001930719 · EVP, Chief Operations Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,887

F1 · shares: Number of shares of common stock withheld to satisfy the reporting person's tax withholding obligations upon vesting of a previously reported restricted stock unit award.

Read SEC document
March 15, 2026 Filed Mar 17, 2026 22:11 UTC
Shepler Christopher L.Chief Banking Officer
GrantCommon Stock 5,971 $33.13 $197,819.23
Disclosure

SEC source: 0002090710-26-000002 · wk-form4_1773785470.xml · nonDerivative · entry 1

Shepler Christopher L. · CIK 0002090710 · Chief Banking Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,870

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
March 15, 2026 Filed Mar 17, 2026 22:11 UTC
Robbins KristinaEVP, Chief Operations Officer
GrantCommon Stock 4,044 $33.13 $133,977.72
Disclosure

SEC source: 0001930719-26-000002 · wk-form4_1773785464.xml · nonDerivative · entry 1

Robbins Kristina · CIK 0001930719 · EVP, Chief Operations Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,128

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
March 15, 2026 Filed Mar 17, 2026 22:07 UTC
Meyer LoriEVP, Chief Information Officer
GrantCommon Stock 3,012 $33.13 $99,787.56
Disclosure

SEC source: 0002003084-26-000002 · wk-form4_1773785246.xml · nonDerivative · entry 1

Meyer Lori · CIK 0002003084 · EVP, Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,820

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
March 15, 2026 Filed Mar 17, 2026 22:08 UTC
Jones Nathan RChief Risk Officer
GrantCommon Stock 3,843 $33.13 $127,318.59
Disclosure

SEC source: 0001820031-26-000002 · wk-form4_1773785289.xml · nonDerivative · entry 1

Jones Nathan R · CIK 0001820031 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,843

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
March 15, 2026 Filed Mar 17, 2026 22:11 UTC
Reuter James ADirector · President and CEO
GrantCommon Stock 31,392 $33.13 $1,040,016.96
Disclosure

SEC source: 0002042435-26-000002 · wk-form4_1773785458.xml · nonDerivative · entry 1

Reuter James A · CIK 0002042435 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,029

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
March 15, 2026 Filed Mar 17, 2026 22:04 UTC
Jensen Kirk DGeneral Counsel
GrantCommon Stock 3,951 $33.13 $130,896.63
Disclosure

SEC source: 0001697127-26-000003 · wk-form4_1773785087.xml · nonDerivative · entry 1

Jensen Kirk D · CIK 0001697127 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,106

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
March 15, 2026 Filed Mar 17, 2026 22:03 UTC
Della Camera DavidChief Financial Officer
GrantCommon Stock 6,279 $33.13 $208,023.27
Disclosure

SEC source: 0002071416-26-000002 · wk-form4_1773785010.xml · nonDerivative · entry 1

Della Camera David · CIK 0002071416 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,985

F1 · shares: Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2027, subject to the reporting person's continued employment through each applicable vesting date.

Read SEC document
January 06, 2026 Filed Jan 6, 2026 23:50 UTC SaleCommon Stock 1,827 $36.92 $67,452.84
Disclosure

SEC source: 0001493152-26-000677 · ownership.xml · nonDerivative · entry 2

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 936,024

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.42 to $37.15. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F4 · ownership.nature: Composed of 571,486 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 shares held of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F5 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
January 05, 2026 Filed Jan 6, 2026 23:50 UTC SaleCommon Stock 3,173 $36.20 $114,862.60
Disclosure

SEC source: 0001493152-26-000677 · ownership.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · 10% owner

Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 · CIK 0001908962 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 937,851

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.10 to $36.37. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F3 · ownership.nature: Composed of 573,313 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 36,553 shares held of record by Holland Elizabeth Scott Trust, 36,553 shares held of record by Harper Grace Scott Trust, 36,554 shares held of record by Harrison William Scott Trust and 45,200 shares held of record by Jonathan Scott's spouse.

F5 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

Read SEC document
December 12, 2025 Filed Dec 15, 2025 18:10 UTC
SCOTT JAMES R10% owner
GiftCommon Stock 755 $0.00 $0.00
Disclosure

SEC source: 0001493152-25-027706 · ownership.xml · nonDerivative · entry 2

SCOTT JAMES R · CIK 0001198533 · 10% owner

James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs · CIK 0001908712 · 10% owner

JS Investments Limited Partnership · CIK 0001908658 · 10% owner

James R & Christine M Scott Foundation · CIK 0001909853 · 10% owner

Foundation for Community Vitality · CIK 0001908742 · 10% owner

James F Heyneman Conservatorship, James Scott, Conservator · CIK 0001908854 · 10% owner

James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees · CIK 0001908844 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · see footnote

Disclosed balance after: 4,433,211

F1 · balance_after: Shares disposed of by James R. Scott's spouse to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott's spouse as a bona fide gift.

F2 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with James R. Scott with the indication of direct or indirect ownership in Tables I and II being made from James R. Scott's perspective unless expressly noted otherwise by footnote. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

F3 · ownership.nature: Composed of 1,989,882 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 14,534 shares held of record by James R Scott's 401k, 35,240 shares held of record by James R and Christine M Scott Foundation, 1,901,036 shares held of record by JS Investments Limited Partnership, 346,563 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 31,879 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 41,075 shares held of record by James R. Scott's spouse.

Read SEC document
December 12, 2025 Filed Dec 15, 2025 18:10 UTC
SCOTT JAMES R10% owner
GiftCommon Stock 755 $0.00 $0.00
Disclosure

SEC source: 0001493152-25-027706 · ownership.xml · nonDerivative · entry 1

SCOTT JAMES R · CIK 0001198533 · 10% owner

James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs · CIK 0001908712 · 10% owner

JS Investments Limited Partnership · CIK 0001908658 · 10% owner

James R & Christine M Scott Foundation · CIK 0001909853 · 10% owner

Foundation for Community Vitality · CIK 0001908742 · 10% owner

James F Heyneman Conservatorship, James Scott, Conservator · CIK 0001908854 · 10% owner

James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees · CIK 0001908844 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · see footnote

Disclosed balance after: 4,433,966

F1 · balance_after: Shares disposed of by James R. Scott's spouse to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott's spouse as a bona fide gift.

F2 · ownership.nature: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with James R. Scott with the indication of direct or indirect ownership in Tables I and II being made from James R. Scott's perspective unless expressly noted otherwise by footnote. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

F3 · ownership.nature: Composed of 1,989,882 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 14,534 shares held of record by James R Scott's 401k, 35,240 shares held of record by James R and Christine M Scott Foundation, 1,901,036 shares held of record by JS Investments Limited Partnership, 346,563 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 31,879 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 41,075 shares held of record by James R. Scott's spouse.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.