FIBK

SEC source: 0000860413-22-000214 · wf-form4_166993926086500.xml · nonDerivative · entry 3

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

Foundation for Community Vitality · CIK 0001908742 · 10% owner

J.S. Investments Limited Partnership · CIK 0001506291 · 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

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

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 4,396,335

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

F4 · balance_after: Composed of 1,970,956 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 17,764 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, 347,375 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. 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 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.

F4 · ownership.nature: Composed of 1,970,956 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 17,764 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, 347,375 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

SEC source: 0000860413-22-000214 · wf-form4_166993926086500.xml · nonDerivative · entry 2

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

Foundation for Community Vitality · CIK 0001908742 · 10% owner

J.S. Investments Limited Partnership · CIK 0001506291 · 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

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

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 4,395,746

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

F2 · balance_after: Composed of 1,970,956 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 17,764 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

F2 · ownership.nature: Composed of 1,970,956 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 17,764 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. 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 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.

SEC source: 0000860413-22-000212 · wf-form4_166976191881334.xml · nonDerivative · entry 1

Hayslip Ashley · CIK 0001955816 · EVP, Chief Banking Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,487

F1 · shares: Shares were issued for no consideration pursuant to the Registrants 2015 Equity Incentive Plan, and vest in three equal portions on November 28th of the first, second and third years following the year in which the grant is made.

SEC source: 0001493152-22-034452 · ownership.xml · nonDerivative · entry 1

SCOTT HOMER A JR · CIK 0001195494 · 10% owner

Homer Scott Jr Trust, Homer Scott Jr. & First Interstate Wealth Management Co Trustees · CIK 0001910945 · 10% owner

Sheridan Stadium Foundation · CIK 0001910115 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,962,463

F1 · balance_after: Composed of 1,956,503 shares held of record by Homer Scott Jr Trust, Homer Scott Jr. & First Interstate Wealth Management Co TTEEs, and 5,960 shares held by Sheridan Stadium Foundation, over which Homer Scott Jr. has shared Voting and dispositive power with the board of the same.

F1 · ownership.nature: Composed of 1,956,503 shares held of record by Homer Scott Jr Trust, Homer Scott Jr. & First Interstate Wealth Management Co TTEEs, and 5,960 shares held by Sheridan Stadium Foundation, over which Homer Scott Jr. has shared Voting and dispositive power with the board of the same.

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 Homer Scott Jr with the indication of direct or indirect ownership in Tables I and II being made from Homer Scott Jr's perspective unless expressly noted otherwise by footnote. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001493152-22-032953 · ownership.xml · nonDerivative · entry 3

SCOTT JULIE A · CIK 0001234619 · Director · 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

Exempt Thomas W Scott Marital Trust 2 · CIK 0001909336 · 10% owner

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

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,803,418

F1 · balance_after: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 121,731 shares held of record by Juliana Sarah Scott Rose Trust, and 121,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

F1 · ownership.nature: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 121,731 shares held of record by Juliana Sarah Scott Rose Trust, and 121,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

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 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.

SEC source: 0001493152-22-032953 · ownership.xml · nonDerivative · entry 2

SCOTT JULIE A · CIK 0001234619 · Director · 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

Exempt Thomas W Scott Marital Trust 2 · CIK 0001909336 · 10% owner

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

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,813,418

F1 · balance_after: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 121,731 shares held of record by Juliana Sarah Scott Rose Trust, and 121,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

F1 · ownership.nature: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 121,731 shares held of record by Juliana Sarah Scott Rose Trust, and 121,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

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 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.

SEC source: 0000860413-22-000206 · wf-form4_166846759183034.xml · nonDerivative · entry 4

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 963,853

F1 · balance_after: Composed of 520,731 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, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

F1 · ownership.nature: Composed of 520,731 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, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

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 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.

SEC source: 0000860413-22-000206 · wf-form4_166846759183034.xml · nonDerivative · entry 3

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 973,853

F1 · balance_after: Composed of 520,731 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, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

F1 · ownership.nature: Composed of 520,731 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, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

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 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.

SEC source: 0000860413-22-000206 · wf-form4_166846759183034.xml · nonDerivative · entry 2

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

IXL Ltd Liability Co · CIK 0001909090 · 10% owner

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 983,853

F1 · balance_after: Composed of 520,731 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, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

F1 · ownership.nature: Composed of 520,731 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, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

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 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.

SEC source: 0001493152-22-032803 · ownership.xml · nonDerivative · entry 4

SCOTT JULIE A · CIK 0001234619 · Director · 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

Exempt Thomas W Scott Marital Trust 2 · CIK 0001909336 · 10% owner

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

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,823,418

F1 · balance_after: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 131,731 shares held of record by Juliana Sarah Scott Rose Trust, and 131,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

F1 · ownership.nature: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 131,731 shares held of record by Juliana Sarah Scott Rose Trust, and 131,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

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 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.

SEC source: 0001493152-22-032803 · ownership.xml · nonDerivative · entry 3

SCOTT JULIE A · CIK 0001234619 · Director · 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

Exempt Thomas W Scott Marital Trust 2 · CIK 0001909336 · 10% owner

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

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,833,418

F1 · balance_after: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 131,731 shares held of record by Juliana Sarah Scott Rose Trust, and 131,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

F1 · ownership.nature: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 131,731 shares held of record by Juliana Sarah Scott Rose Trust, and 131,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

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 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.

SEC source: 0001493152-22-032803 · ownership.xml · nonDerivative · entry 2

SCOTT JULIE A · CIK 0001234619 · Director · 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

Exempt Thomas W Scott Marital Trust 2 · CIK 0001909336 · 10% owner

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

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,843,418

F1 · balance_after: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 131,731 shares held of record by Juliana Sarah Scott Rose Trust, and 131,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

F1 · ownership.nature: Composed of 397,210 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust 1,669,865 Shares held of record by the Non-Exempt Thomas W.Scott Marital Trust, 89,335 shares held of record by the Exempt Thomas W. Scott Marital Trust 2, 10,424 shares held of record by Joan D. Scott trust DTD 10-16-12, 131,731 shares held of record by Juliana Sarah Scott Rose Trust, and 131,731 shares held of record by Elizabeth Lauren Scott Rose Trust.

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 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.

SEC source: 0000860413-22-000208 · wf-form4_166846788564122.xml · nonDerivative · entry 2

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

J.S. Investments Limited Partnership · CIK 0001506291 · 10% owner

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

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

Foundation for Community Vitality · CIK 0001908742 · 10% owner

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

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 4,396,335

F1 · balance_after: Composed of 1,971,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

F1 · ownership.nature: Composed of 1,971,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

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.

SEC source: 0001493152-22-031525 · ownership.xml · nonDerivative · entry 1

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

First Interstate Bank TTEE for Dana S Andersson GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910215 · 10% owner

First Interstate Bank TTEE for James R Scott Jr. GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910352 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 81,454

F1 · price: The price reported in column 4 is a weighted average price. The shares sold on 11/10/2022 were sold in multiple transactions at prices ranging from $ 46.25 to $ 46.305. 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.

SEC source: 0000860413-22-000204 · wf-form4_166793783539032.xml · nonDerivative · entry 1

Lee Russell A · CIK 0001804401 · EVP & Chief Banking Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,771

SEC source: 0001493152-22-029964 · ownership.xml · nonDerivative · entry 2

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

First Interstate Bank TTEE for Dana S Andersson GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910215 · 10% owner

First Interstate Bank TTEE for James R Scott Jr. GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910352 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,306

SEC source: 0001493152-22-029964 · ownership.xml · nonDerivative · entry 1

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

First Interstate Bank TTEE for Dana S Andersson GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910215 · 10% owner

First Interstate Bank TTEE for James R Scott Jr. GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910352 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,306

F1 · price: The price reported in column 4 is a weighted average price. The shares sold on 10/28/22 were sold in multiple transactions at prices ranging from $ 45.00 to 45.007. 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.

SEC source: 0001493152-22-024168 · ownership.xml · nonDerivative · entry 1

SCOTT HOMER A JR · CIK 0001195494 · 10% owner

Homer Scott Jr Trust, Homer Scott Jr. & First Interstate Wealth Management Co Trustees · CIK 0001910945 · 10% owner

Sheridan Stadium Foundation · CIK 0001910115 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,012,419

F1 · balance_after: 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, if any, together with Homer Scott Jr. with the indication of direct or indirect ownership in Tables I & II being made from Homer Scott Jr.'s Perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

F2 · ownership.nature: Composed of 1,966,032 shares held of record by Homer Scott Jr Trust, Homer Scott Jr. & First Interstate Wealth Management Co Trustees, 5,960 shares held of record by Sheridan Stadium Foundation, 26,193 shares held of record by Homer Scott Jr. and 14,234 shares held of record by Homer Scott Jr.'s spouse.

SEC source: 0001493152-22-023136 · ownership.xml · nonDerivative · entry 1

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

First Interstate Bank TTEE for Dana S Andersson GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910215 · 10% owner

First Interstate Bank TTEE for James R Scott Jr. GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910352 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,436

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $ 42.00 to 42.04. 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.

SEC source: 0000860413-23-000010 · wf-form4_167451609195129.xml · nonDerivative · entry 1

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

Foundation for Community Vitality · CIK 0001908742 · 10% owner

J.S. Investments Limited Partnership · CIK 0001506291 · 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

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

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 4,390,120

F1 · shares: Foundation for Community Vitality sold the 6,215 shares.

F2 · balance_after: Composed of 1,970,956 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 17,764 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, 341,749 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

F2 · ownership.nature: Composed of 1,970,956 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 17,764 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, 341,749 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. 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 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.

SEC source: 0001493152-22-022386 · ownership.xml · nonDerivative · entry 1

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

First Interstate Bank TTEE for Dana S Andersson GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910215 · 10% owner

First Interstate Bank TTEE for James R Scott Jr. GST Exempt Trust No 1 Dtd 12/11/2020 · CIK 0001910352 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 102,936

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $ 41.00 to 41.04. 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.

SEC source: 0000860413-22-000193 · wf-form4_166034213805604.xml · nonDerivative · entry 4

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

J.S. Investments Limited Partnership · CIK 0001506291 · 10% owner

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

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

Foundation for Community Vitality · CIK 0001908742 · 10% owner

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

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 4,414,335

F3 · shares: Shares disposed of by James R. Scott Trust to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott Trust, as a bona fide gift.

F1 · balance_after: Composed of 1,989,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

F1 · ownership.nature: Composed of 1,989,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

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.

SEC source: 0000860413-22-000193 · wf-form4_166034213805604.xml · nonDerivative · entry 3

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

J.S. Investments Limited Partnership · CIK 0001506291 · 10% owner

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

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

Foundation for Community Vitality · CIK 0001908742 · 10% owner

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

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 4,408,120

F3 · shares: Shares disposed of by James R. Scott Trust to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott Trust, as a bona fide gift.

F1 · balance_after: Composed of 1,989,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

F1 · ownership.nature: Composed of 1,989,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

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.

SEC source: 0000860413-22-000193 · wf-form4_166034213805604.xml · nonDerivative · entry 2

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

J.S. Investments Limited Partnership · CIK 0001506291 · 10% owner

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

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

Foundation for Community Vitality · CIK 0001908742 · 10% owner

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

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 4,414,335

F1 · balance_after: Composed of 1,989,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

F1 · ownership.nature: Composed of 1,989,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 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, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse.

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.

SEC source: 0001125727-22-000018 · wf-form4_166000008031602.xml · nonDerivative · entry 4

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 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: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 993,853

F1 · kind: The transaction was made pursuant to the Insider's Rule 10b5-1 plan.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.01 to $40.87. 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 · balance_after: Composed of 520,731 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, 71,148 shares held of record by Holland Elizabeth Scott Trust, 71,148 shares held of record by Harper Grace Scott Trust, 71,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: Composed of 520,731 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, 71,148 shares held of record by Holland Elizabeth Scott Trust, 71,148 shares held of record by Harper Grace Scott Trust, 71,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

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 Jonathan R. Scott with the indication of direct or indirect ownership in Table I being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001125727-22-000018 · wf-form4_166000008031602.xml · nonDerivative · entry 3

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 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: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,017,568

F1 · kind: The transaction was made pursuant to the Insider's Rule 10b5-1 plan.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.01 to $40.87. 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 · balance_after: Composed of 520,731 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, 71,148 shares held of record by Holland Elizabeth Scott Trust, 71,148 shares held of record by Harper Grace Scott Trust, 71,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: Composed of 520,731 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, 71,148 shares held of record by Holland Elizabeth Scott Trust, 71,148 shares held of record by Harper Grace Scott Trust, 71,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

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 Jonathan R. Scott with the indication of direct or indirect ownership in Table I being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001125727-22-000018 · wf-form4_166000008031602.xml · nonDerivative · entry 2

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 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: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,041,283

F1 · kind: The transaction was made pursuant to the Insider's Rule 10b5-1 plan.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.01 to $40.87. 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 · balance_after: Composed of 520,731 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, 71,148 shares held of record by Holland Elizabeth Scott Trust, 71,148 shares held of record by Harper Grace Scott Trust, 71,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

F3 · ownership.nature: Composed of 520,731 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, 71,148 shares held of record by Holland Elizabeth Scott Trust, 71,148 shares held of record by Harper Grace Scott Trust, 71,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse.

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 Jonathan R. Scott with the indication of direct or indirect ownership in Table I being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001125727-22-000018 · wf-form4_166000008031602.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 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: Not disclosed

Ownership: Direct

Disclosed balance after: 6,001

F1 · kind: The transaction was made pursuant to the Insider's Rule 10b5-1 plan.

SEC source: 0001125727-22-000012 · wf-form4_165956419899967.xml · nonDerivative · entry 1

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

John M Heyneman Jr. Trust · CIK 0001908848 · 10% owner

Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust · CIK 0001908849 · 10% owner

Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust · CIK 0001908784 · 10% owner

Towanda Investments Limited Partnership · CIK 0001908810 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,130

SEC source: 0001125727-22-000016 · wf-form4_165956617129194.xml · nonDerivative · entry 1

Lee Russell A · CIK 0001804401 · EVP & Chief Banking Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,271

SEC source: 0001493152-22-019815 · ownership.xml · nonDerivative · entry 1

Heyneman Susan Scott · CIK 0001745809 · 10% owner

Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees · CIK 0001908880 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 639,256

F1 · balance_after: Composed of 639,256 shares held of record by Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees.

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, if any, together with Susan Scott Heyneman.

SEC source: 0000860413-22-000179 · wf-form4_165533143755771.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,001

F1 · kind: The transaction was made pursuant to the Insider's Rule 10b5-1 plan.

SEC source: 0000860413-22-000177 · wf-form4_165420617092516.xml · nonDerivative · entry 1

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

John M Heyneman Jr. Trust · CIK 0001908848 · 10% owner

Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust · CIK 0001908849 · 10% owner

Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust · CIK 0001908784 · 10% owner

Towanda Investments Limited Partnership · CIK 0001908810 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,130

SEC source: 0000860413-22-000176 · wf-form4_165420614050700.xml · nonDerivative · entry 1

Scott Jonathan R · CIK 0001361935 · Director · 10% owner

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

Harper Grace Scott Trust · CIK 0001908895 · 10% owner

Harrison William Scott Trust · CIK 0001908873 · 10% owner

Holland Elizabeth Scott Trust · CIK 0001908953 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,001

SEC source: 0000860413-22-000175 · wf-form4_165420607934720.xml · nonDerivative · entry 1

SCOTT JAMES R · CIK 0001198533 · Director · 10% owner

Foundation for Community Vitality · CIK 0001908742 · 10% owner

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

J.S. Investments Limited Partnership · CIK 0001506291 · 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

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

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,651

SEC source: 0000860413-22-000171 · wf-form4_165420349583394.xml · nonDerivative · entry 1

Leckie Ross E. · CIK 0001463966 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,734

SEC source: 0000860413-22-000170 · wf-form4_165420297986329.xml · nonDerivative · entry 5

RILEY KEVIN P · CIK 0001408733 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,049

SEC source: 0000860413-22-000170 · wf-form4_165420297986329.xml · nonDerivative · entry 4

RILEY KEVIN P · CIK 0001408733 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By IRA

Disclosed balance after: 92,555

SEC source: 0000860413-22-000170 · wf-form4_165420297986329.xml · nonDerivative · entry 3

RILEY KEVIN P · CIK 0001408733 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By IRA

Disclosed balance after: 91,815

SEC source: 0000860413-22-000170 · wf-form4_165420297986329.xml · nonDerivative · entry 2

RILEY KEVIN P · CIK 0001408733 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By IRA

Disclosed balance after: 91,365

SEC source: 0000860413-22-000170 · wf-form4_165420297986329.xml · nonDerivative · entry 1

RILEY KEVIN P · CIK 0001408733 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By IRA

Disclosed balance after: 76,918

SEC source: 0000860413-22-000168 · wf-form4_165420253373511.xml · nonDerivative · entry 1

BRANNEN JAMES · CIK 0001201565 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,685

SEC source: 0000860413-22-000167 · wf-form4_165420251745042.xml · nonDerivative · entry 1

Phillips Joyce Ann · CIK 0001594614 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,991

SEC source: 0000860413-22-000166 · wf-form4_165420249285208.xml · nonDerivative · entry 1

RYKHUS DANIEL A · CIK 0001284209 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,645

SEC source: 0000860413-22-000165 · wf-form4_165420245234706.xml · nonDerivative · entry 1

Cho Alice S · CIK 0001812520 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,184

SEC source: 0000860413-22-000164 · wf-form4_165420243410727.xml · nonDerivative · entry 1

Johnson Dennis L · CIK 0001572624 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,847

SEC source: 0000860413-22-000163 · wf-form4_165420241634857.xml · nonDerivative · entry 1

Bowman Biff · CIK 0001548048 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,579

SEC source: 0000860413-22-000162 · wf-form4_165420239793247.xml · nonDerivative · entry 1

Lacy Stephen Mark · CIK 0001652090 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,473

SEC source: 0000860413-22-000161 · wf-form4_165420236682437.xml · nonDerivative · entry 1

HENNING THOMAS EDWARD · CIK 0001269806 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,651

SEC source: 0000860413-22-000160 · wf-form4_165420234594499.xml · nonDerivative · entry 1

Jahnke David L · CIK 0001527851 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,873