FIBK

SEC source: 0001493152-25-027028 · ownership.xml · nonDerivative · entry 2

Scott Geoffrey D · CIK 0002022652 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 2,615

SEC source: 0001493152-25-027028 · ownership.xml · nonDerivative · entry 1

Scott Geoffrey D · CIK 0002022652 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 113,926

SEC source: 0001493152-25-027706 · ownership.xml · nonDerivative · entry 4

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

F4 · balance_after: Shares disposed of by James R. Scott Trust, James R Scott & First Interstate Wealth Managment Co-TTEEs's to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott Trust, James R Scott & First Interstate Wealth Managment Co-TTEEs's, 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.

SEC source: 0001493152-25-027706 · ownership.xml · nonDerivative · entry 3

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

F4 · balance_after: Shares disposed of by James R. Scott Trust, James R Scott & First Interstate Wealth Managment Co-TTEEs's to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott Trust, James R Scott & First Interstate Wealth Managment Co-TTEEs's, 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.

SEC source: 0000860413-26-000002 · wk-form4_1767728775.xml · nonDerivative · entry 1

Scott Jeremy · CIK 0001803925 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,496

SEC source: 0001493152-26-007143 · ownership.xml · nonDerivative · entry 3

Scott Jeremy · CIK 0001803925 · Director · 10% owner

Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 · CIK 0001909124 · 10% owner

NBAR5 Limited Partnership · CIK 0002076804 · 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: 3,513,549

F2 · shares: Composed of 3,416,108 shares held of record by NBar5 Limited Partnership, 25,119 shares held of record by Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 (550 of which were received as a gift on August 8, 2025 but inadvertently previously reported incorrectly as held directly), 68,942 shares held of record by Jeremy Scott Trustee, 2025 Grantor Retained Annuity Irrevocable Trust, and 3,380 shares held of record by Jeremy Scott's spouse (550 of which were received as a gift as described in the table).

F2 · balance_after: Composed of 3,416,108 shares held of record by NBar5 Limited Partnership, 25,119 shares held of record by Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 (550 of which were received as a gift on August 8, 2025 but inadvertently previously reported incorrectly as held directly), 68,942 shares held of record by Jeremy Scott Trustee, 2025 Grantor Retained Annuity Irrevocable Trust, and 3,380 shares held of record by Jeremy Scott's spouse (550 of which were received as a gift as described in the table).

F3 · 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 to the agreement and may be deemed to share beneficial ownership of the securities to which this footnote relates. 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 the indication of direct or indirect ownership in Tables I and II being made from Jeremy 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: 0001493152-25-026182 · ownership.xml · nonDerivative · entry 1

Scott Risa Kae · CIK 0001798829 · 10% owner

Risa K Scott TTEE Risa K Scott Trust Dtd 12/4/15 · CIK 0001908674 · 10% owner

Risa K. Scott & John Heyneman Jr., TTEEs FBO Risa K Scott Exemption Trust Under the Scott Family 1996 Trust · CIK 0001908770 · 10% owner

Risa K Scott Grantor Retained Annuity Trust Dtd 5/19/24 · CIK 0002056408 · 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: 322,546

F1 · 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 Risa K Scott.

F2 · ownership.nature: Composed of 322,546 shares held of record by Risa K. Scott TTEE, Risa K Scott Trust dtd 12/4/15, over which Risa K Scott has sole voting & dispositive power.

SEC source: 0001493152-25-025519 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 224,460

F1 · balance_after: Composed of 224,460 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, Trust.

SEC source: 0002090710-25-000010 · wk-form4_1764010362.xml · nonDerivative · entry 1

Shepler Christopher L. · CIK 0002090710 · Chief Banking Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,899

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 November 24, 2026, subject to the reporting person's continued employment through each applicable vesting date.

SEC source: 0001198518-25-000009 · wk-form4_1764091760.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: No plan indicated

Ownership: Indirect · see footnote

Disclosed balance after: 1,414,636

F1 · 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 John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

F2 · ownership.nature: Composed of 150,000 shares held of record by John M Heyneman Jr. Trust, 85,836 shares held of record by Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust, 85,836 shares held of record by Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust, 1,085,792 shares held of record by Towanda Investments Limited Partnership, 4,552 shares held of record by John Heyneman, Jr.'s spouse, 1095 shares held of record by John Heyneman, Jr.'s daughter, 1,215 shares held of record by John Heyneman, Jr.'s son Quinn, and 310 shares held of record by John Heyneman, Jr.'s son Bae-John.

SEC source: 0001198518-25-000004 · wk-form4_1762983968.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By Bench Ranch LLC

Disclosed balance after: 30,154

F1 · 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 John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001198518-25-000004 · wk-form4_1762983968.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By Awe' LLC

Disclosed balance after: 47,482

F1 · 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 John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001493152-25-020655 · 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: 941,024

F1 · ownership.nature: Composed of 576,486 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.

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: 0001493152-25-020651 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 234,460

F1 · balance_after: Composed of 234,460 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, Trust.

SEC source: 0001493152-25-020116 · 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: 945,824

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.00 to $32.64. 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 576,486 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 50,000 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.

SEC source: 0001493152-25-017566 · 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: 952,824

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.52 to $31.76. 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 589,086 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 50,000 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.

SEC source: 0001493152-25-017493 · 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: 953,509

F4 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.00 to $32.07. 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: 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.

F5 · ownership.nature: Composed of 584,171 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 50,000 shares held of record by Jonathan Scott's spouse.

SEC source: 0001493152-25-017493 · 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: 959,109

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.00 to $32.33. 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 589,771 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 50,000 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.

SEC source: 0001493152-25-016804 · ownership.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 244,460

F1 · balance_after: Composed of 244,460 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, Trust.

SEC source: 0001493152-25-016804 · ownership.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 254,460

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, Trust.

SEC source: 0001198518-25-000004 · wk-form4_1762983968.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By Awe' LLC

Disclosed balance after: 67,482

F1 · 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 John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001493152-25-016804 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 321,942

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, Trust.

SEC source: 0002090710-25-000007 · wk-form4_1760047225.xml · nonDerivative · entry 1

Shepler Christopher L. · CIK 0002090710 · Chief Banking Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,308

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 September 10, 2026, subject to the reporting person's continued employment through each applicable vesting date.

SEC source: 0001198518-25-000004 · wk-form4_1762983968.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By Bench Ranch LLC

Disclosed balance after: 45,154

F1 · 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 John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC source: 0001493152-25-016804 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 367,096

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, Trust.

SEC source: 0001198518-25-000004 · wk-form4_1762983968.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · see footnote

Disclosed balance after: 1,445,068

F1 · 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 John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

F2 · ownership.nature: Composed of 180,432 shares held of record by John M Heyneman Jr. Trust, 85,836 shares held of record by Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust, 85,836 shares held of record by Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust, 1,085,792 shares held of record by Towanda Investments Limited Partnership, 4,552 shares held of record by John Heyneman, Jr.'s spouse, 1,095 shares held of record by John Heyneman, Jr.'s daughter, 1,215 shares held of record by John Heyneman, Jr.'s son Quinn, and 310 shares held of record by John Heyneman, Jr.'s son Bae-John.

SEC source: 0000860413-25-000145 · wk-form4_1757434761.xml · nonDerivative · entry 1

Agrawal Renu · CIK 0001838577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,827

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, 2026, subject to the reporting person's provision of continuous service to the Registrant through the vesting date.

SEC source: 0001641172-25-026792 · ownership.xml · nonDerivative · entry 1

Scott Jeremy · CIK 0001803925 · Director · 10% owner

Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 · CIK 0001909124 · 10% owner

NBAR5 Limited Partnership · CIK 0002076804 · 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: 3,512,233

F1 · ownership.nature: Composed of 3,416,108 shares held of record by NBar5 Limited Partnership, 93,511 shares held of record following both transactions reported herein by Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15, and 2,830 shares held of record by Jeremy 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 to the agreement 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 his or its pecuniary interest therein. The reporting persons expect to file future Forms 4 or 5, if any, together with the indication of direct or indirect ownership in Tables I and II being made from Jeremy 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: 0001641172-25-026204 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 519,256

F1 · balance_after: Composed of 519,256 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, Trust.

SEC source: 0000860413-25-000132 · wk-form4_1756487102.xml · nonDerivative · entry 1

SCUDDER MICHAEL L · CIK 0001199246 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,879

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, 2026, subject to the reporting persons provision of continuous service to the Registrant through the vesting date.

SEC source: 0000860413-25-000125 · wk-form4_1755554830.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: No plan indicated

Ownership: Direct

Disclosed balance after: 5,224

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.07 to $30.23. 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.

SEC source: 0001641172-25-026792 · ownership.xml · nonDerivative · entry 2

Scott Jeremy · CIK 0001803925 · Director · 10% owner

Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 · CIK 0001909124 · 10% owner

NBAR5 Limited Partnership · CIK 0002076804 · 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: 3,512,449

F1 · ownership.nature: Composed of 3,416,108 shares held of record by NBar5 Limited Partnership, 93,511 shares held of record following both transactions reported herein by Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15, and 2,830 shares held of record by Jeremy 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 to the agreement 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 his or its pecuniary interest therein. The reporting persons expect to file future Forms 4 or 5, if any, together with the indication of direct or indirect ownership in Tables I and II being made from Jeremy 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: 0001493152-26-007141 · ownership.xml · nonDerivative · entry 1

Scott Geoffrey D · CIK 0002022652 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 236,808

F1 · balance_after: Reportable beneficial ownership acquired upon receipt of shares by gift by the reporting person of general partner interests in NBAR5 O Limited Partnership, which partnership holds such shares directly and with respect to which the reporting person previously held only limited partner interests. The reporting person disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.

F1 · ownership.nature: Reportable beneficial ownership acquired upon receipt of shares by gift by the reporting person of general partner interests in NBAR5 O Limited Partnership, which partnership holds such shares directly and with respect to which the reporting person previously held only limited partner interests. The reporting person disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.

SEC source: 0001493152-26-007143 · ownership.xml · nonDerivative · entry 1

Scott Jeremy · CIK 0001803925 · Director · 10% owner

Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 · CIK 0001909124 · 10% owner

NBAR5 Limited Partnership · CIK 0002076804 · 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: 236,808

F1 · balance_after: Reportable beneficial ownership acquired upon receipt of shares by gift by Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 of general partner interests in NBAR5 O Limited Partnership, which partnership holds such shares directly and with respect to which the reporting persons, as applicable, previously held only limited partner interests. The reporting persons disclaim beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.

F1 · ownership.nature: Reportable beneficial ownership acquired upon receipt of shares by gift by Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 of general partner interests in NBAR5 O Limited Partnership, which partnership holds such shares directly and with respect to which the reporting persons, as applicable, previously held only limited partner interests. The reporting persons disclaim beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.

SEC source: 0001641172-25-021903 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 529,256

F3 · price: The price reported in column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging form $27.60 to $28.28. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holders 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.

F1 · balance_after: Composed of 529,256 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, Trust.

SEC source: 0001641172-25-019763 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 584,256

F3 · price: The price reported in column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging form $30.85 to $31.31. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holders 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.

F1 · balance_after: Composed of 584,256 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, Trust.

SEC source: 0000860413-25-000102 · wk-form4_1748979601.xml · nonDerivative · entry 1

Bowman Biff · CIK 0001548048 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,682

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000100 · wk-form4_1748977156.xml · nonDerivative · entry 1

Scott James R. Jr · CIK 0001675872 · Director · 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: No plan indicated

Ownership: Direct

Disclosed balance after: 78,545

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000098 · wk-form4_1748976973.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: No plan indicated

Ownership: Direct

Disclosed balance after: 17,042

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000096 · wk-form4_1748976834.xml · nonDerivative · entry 1

Scott Jeremy · CIK 0001803925 · Director · 10% owner

Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 · CIK 0001909124 · 10% owner

NBAR5 S, LP · CIK 0001908842 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,946

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000092 · wk-form4_1748976241.xml · nonDerivative · entry 1

Lacy Stephen Mark · CIK 0001652090 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,834

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000094 · wk-form4_1748976363.xml · nonDerivative · entry 1

Phillips Joyce Ann · CIK 0001594614 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,352

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000090 · wk-form4_1748976121.xml · nonDerivative · entry 1

MOSS PATRICIA L · CIK 0001190817 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,062

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000086 · wk-form4_1748975817.xml · nonDerivative · entry 1

RYKHUS DANIEL A · CIK 0001284209 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,110

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000088 · wk-form4_1748975986.xml · nonDerivative · entry 1

Johnson Dennis L · CIK 0001572624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,208

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000084 · wk-form4_1748975688.xml · nonDerivative · entry 1

Jahnke David L · CIK 0001527851 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,501

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, 2026, 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 stockholder meeting.

SEC source: 0000860413-25-000081 · wk-form4_1748974403.xml · nonDerivative · entry 1

Cho Alice S · CIK 0001812520 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,545

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, 2026, 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 Registrants [next] annual stockholder meeting.

SEC source: 0000860413-25-000072 · wk-form4_1748554678.xml · nonDerivative · entry 1

Robbins Kristina · CIK 0001930719 · EVP, Chief Operations Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,084

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

SEC source: 0000860413-25-000034 · wk-form4_1742337262.xml · nonDerivative · entry 5

Robbins Kristina · CIK 0001930719 · EVP, Chief Operations Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,342

F2 · shares: Disposition to the issuer of issuer securities in payment of minimum required withholding taxes due upon vesting of unvested shares.

SEC source: 0000860413-25-000034 · wk-form4_1742337262.xml · nonDerivative · entry 4

Robbins Kristina · CIK 0001930719 · EVP, Chief Operations Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,836

F2 · shares: Disposition to the issuer of issuer securities in payment of minimum required withholding taxes due upon vesting of unvested shares.