STOCK TITAN

[Form 4] First Interstate BancSystem, Inc. Insider Trading Activity

Filing Impact
(High)
Filing Sentiment
(Negative)
Form Type
4
Rhea-AI Filing Summary

On 1 Aug 2025, the Susan Scott Heyneman Trust—identified as a 10 % owner of First Interstate BancSystem (FIBK)—filed a Form 4 reporting an open-market sale of 55,000 common shares (transaction code “S”). The weighted-average sale price was $27.86 with trades executed between $27.60 and $28.28, implying gross proceeds of roughly $1.53 million.

Following the disposal, the trust’s indirect ownership fell to 529,256 shares, down about 9 % from an estimated 584,256 shares prior to the sale. No derivative transactions were reported. The filer noted potential group status with other shareholders but disclaimed beneficial ownership beyond its pecuniary interest, and no Rule 10b5-1 trading plan was indicated.

While insider transactions do not automatically signal a change in fundamentals, a sizable sale by a large holder can be interpreted by investors as a bearish sentiment indicator absent further context.

Il 1° agosto 2025, il Susan Scott Heyneman Trust—identificato come proprietario del 10% di First Interstate BancSystem (FIBK)—ha presentato un Modulo 4 segnalando una vendita sul mercato aperto di 55.000 azioni ordinarie (codice transazione “S”). Il prezzo medio ponderato di vendita è stato di 27,86 $, con operazioni eseguite tra 27,60 e 28,28 $, per un ricavo lordo stimato di circa 1,53 milioni di dollari.

Dopo la cessione, la proprietà indiretta del trust è scesa a 529.256 azioni, in calo di circa il 9% rispetto a un totale stimato di 584.256 azioni prima della vendita. Non sono state segnalate transazioni su strumenti derivati. Il dichiarante ha indicato una possibile condizione di gruppo con altri azionisti, ma ha escluso la titolarità effettiva oltre il proprio interesse pecuniario, e non è stato indicato alcun piano di trading secondo la Regola 10b5-1.

Pur non indicando necessariamente un cambiamento nei fondamentali, una vendita significativa da parte di un grande azionista può essere interpretata dagli investitori come un segnale di sentiment ribassista in assenza di ulteriori contesti.

El 1 de agosto de 2025, el Susan Scott Heyneman Trust—identificado como un propietario del 10% de First Interstate BancSystem (FIBK)—presentó un Formulario 4 reportando una venta en mercado abierto de 55,000 acciones comunes (código de transacción “S”). El precio promedio ponderado de venta fue de $27.86, con operaciones realizadas entre $27.60 y $28.28, lo que implica ingresos brutos de aproximadamente $1.53 millones.

Tras la disposición, la propiedad indirecta del fideicomiso cayó a 529,256 acciones, una reducción de alrededor del 9% desde un estimado de 584,256 acciones antes de la venta. No se reportaron transacciones con derivados. El declarante señaló un posible estatus de grupo con otros accionistas, pero negó la propiedad beneficiaria más allá de su interés pecuniario, y no se indicó ningún plan de negociación bajo la Regla 10b5-1.

Aunque las transacciones internas no indican automáticamente un cambio en los fundamentos, una venta considerable por parte de un gran titular puede interpretarse por los inversores como un indicador de sentimiento bajista en ausencia de un contexto adicional.

2025년 8월 1일, Susan Scott Heyneman Trust는 First Interstate BancSystem(FIBK)의 10% 소유주로서 55,000주 보통주 공개시장 매도를 보고하는 Form 4를 제출했습니다(거래 코드 “S”). 가중 평균 매도 가격은 $27.86였으며, 거래는 $27.60에서 $28.28 사이에서 이루어져 총 매출액은 약 $1.53백만으로 추산됩니다.

매도 후, 신탁의 간접 소유 주식 수는 529,256주로 감소했으며, 이는 매도 전 추정치인 584,256주에서 약 9% 하락한 수치입니다. 파생상품 거래는 보고되지 않았습니다. 신고자는 다른 주주들과의 잠재적 그룹 상태를 언급했으나, 경제적 이익을 초과하는 실질 소유권은 부인했으며, Rule 10b5-1 거래 계획도 명시하지 않았습니다.

내부자 거래가 반드시 기본적 변화 신호는 아니지만, 대규모 보유자의 상당한 매도는 추가 맥락이 없을 경우 투자자들 사이에서 약세 심리 지표로 해석될 수 있습니다.

Le 1er août 2025, le Susan Scott Heyneman Trust—identifié comme un détenteur de 10 % de First Interstate BancSystem (FIBK)—a déposé un formulaire 4 signalant une vente en marché libre de 55 000 actions ordinaires (code transaction « S »). Le prix moyen pondéré de vente était de 27,86 $, avec des transactions réalisées entre 27,60 $ et 28,28 $, impliquant un produit brut d'environ 1,53 million de dollars.

Après cette cession, la détention indirecte du trust est tombée à 529 256 actions, soit une baisse d'environ 9 % par rapport à un total estimé à 584 256 actions avant la vente. Aucune transaction sur dérivés n'a été signalée. Le déclarant a mentionné un statut potentiel de groupe avec d'autres actionnaires, mais a nié toute propriété bénéficiaire au-delà de son intérêt pécuniaire, et aucun plan de trading selon la règle 10b5-1 n'a été indiqué.

Bien que les transactions d'initiés ne signalent pas automatiquement un changement fondamental, une vente importante par un gros détenteur peut être interprétée par les investisseurs comme un indicateur de sentiment baissier en l'absence de contexte supplémentaire.

Am 1. August 2025 reichte der Susan Scott Heyneman Trust—als 10% Eigentümer von First Interstate BancSystem (FIBK)—ein Formular 4 ein, das einen Verkauf von 55.000 Stammaktien am offenen Markt meldete (Transaktionscode „S“). Der gewichtete Durchschnittspreis lag bei 27,86 $, mit Trades zwischen 27,60 $ und 28,28 $, was einen Bruttoerlös von etwa 1,53 Millionen $ impliziert.

Nach dem Verkauf sank der indirekte Besitz des Trusts auf 529.256 Aktien, was einem Rückgang von etwa 9 % gegenüber geschätzten 584.256 Aktien vor dem Verkauf entspricht. Es wurden keine Derivatgeschäfte gemeldet. Der Einreicher wies auf einen möglichen Gruppenstatus mit anderen Aktionären hin, bestritt jedoch eine wirtschaftliche Eigentümerschaft über sein finanzielles Interesse hinaus, und es wurde kein Handelsplan nach Regel 10b5-1 angegeben.

Obwohl Insider-Transaktionen nicht automatisch eine Änderung der Fundamentaldaten signalisieren, kann ein größerer Verkauf durch einen Großaktionär von Investoren ohne weiteren Kontext als negatives Stimmungszeichen interpretiert werden.

Positive
  • None.
Negative
  • 55,000-share sale by a 10 % owner (≈9 % of its holdings) may signal reduced confidence and applies modest selling pressure on FIBK shares.

Insights

TL;DR: 10 % owner cut stake by 9 %, selling 55k FIBK shares at $27.86—mild negative signal, limited fundamental impact.

The trust’s sale amounts to roughly $1.5 mm and leaves it with 529k shares, still a significant position. Although the transaction reduces alignment with minority investors, the magnitude (≈0.5 % of FIBK’s 104 mm shares outstanding) is modest on a company-wide basis. No accompanying 10b5-1 plan or insider purchases offsetting the sale were disclosed, so near-term market interpretation is likely slightly negative. Fundamental outlook remains unchanged; monitor for additional sales or pattern formation.

TL;DR: Significant holder reduced exposure; transparency adequate, but sale may influence governance dynamics.

The trust is part of a shareholder agreement group, so any repositioning can shift voting power. A 55k-share reduction does not materially alter control, yet repeated sales could dilute influence over board matters. The absence of a pre-arranged trading plan leaves motives opaque, warranting vigilance from investors focused on governance stability.

Il 1° agosto 2025, il Susan Scott Heyneman Trust—identificato come proprietario del 10% di First Interstate BancSystem (FIBK)—ha presentato un Modulo 4 segnalando una vendita sul mercato aperto di 55.000 azioni ordinarie (codice transazione “S”). Il prezzo medio ponderato di vendita è stato di 27,86 $, con operazioni eseguite tra 27,60 e 28,28 $, per un ricavo lordo stimato di circa 1,53 milioni di dollari.

Dopo la cessione, la proprietà indiretta del trust è scesa a 529.256 azioni, in calo di circa il 9% rispetto a un totale stimato di 584.256 azioni prima della vendita. Non sono state segnalate transazioni su strumenti derivati. Il dichiarante ha indicato una possibile condizione di gruppo con altri azionisti, ma ha escluso la titolarità effettiva oltre il proprio interesse pecuniario, e non è stato indicato alcun piano di trading secondo la Regola 10b5-1.

Pur non indicando necessariamente un cambiamento nei fondamentali, una vendita significativa da parte di un grande azionista può essere interpretata dagli investitori come un segnale di sentiment ribassista in assenza di ulteriori contesti.

El 1 de agosto de 2025, el Susan Scott Heyneman Trust—identificado como un propietario del 10% de First Interstate BancSystem (FIBK)—presentó un Formulario 4 reportando una venta en mercado abierto de 55,000 acciones comunes (código de transacción “S”). El precio promedio ponderado de venta fue de $27.86, con operaciones realizadas entre $27.60 y $28.28, lo que implica ingresos brutos de aproximadamente $1.53 millones.

Tras la disposición, la propiedad indirecta del fideicomiso cayó a 529,256 acciones, una reducción de alrededor del 9% desde un estimado de 584,256 acciones antes de la venta. No se reportaron transacciones con derivados. El declarante señaló un posible estatus de grupo con otros accionistas, pero negó la propiedad beneficiaria más allá de su interés pecuniario, y no se indicó ningún plan de negociación bajo la Regla 10b5-1.

Aunque las transacciones internas no indican automáticamente un cambio en los fundamentos, una venta considerable por parte de un gran titular puede interpretarse por los inversores como un indicador de sentimiento bajista en ausencia de un contexto adicional.

2025년 8월 1일, Susan Scott Heyneman Trust는 First Interstate BancSystem(FIBK)의 10% 소유주로서 55,000주 보통주 공개시장 매도를 보고하는 Form 4를 제출했습니다(거래 코드 “S”). 가중 평균 매도 가격은 $27.86였으며, 거래는 $27.60에서 $28.28 사이에서 이루어져 총 매출액은 약 $1.53백만으로 추산됩니다.

매도 후, 신탁의 간접 소유 주식 수는 529,256주로 감소했으며, 이는 매도 전 추정치인 584,256주에서 약 9% 하락한 수치입니다. 파생상품 거래는 보고되지 않았습니다. 신고자는 다른 주주들과의 잠재적 그룹 상태를 언급했으나, 경제적 이익을 초과하는 실질 소유권은 부인했으며, Rule 10b5-1 거래 계획도 명시하지 않았습니다.

내부자 거래가 반드시 기본적 변화 신호는 아니지만, 대규모 보유자의 상당한 매도는 추가 맥락이 없을 경우 투자자들 사이에서 약세 심리 지표로 해석될 수 있습니다.

Le 1er août 2025, le Susan Scott Heyneman Trust—identifié comme un détenteur de 10 % de First Interstate BancSystem (FIBK)—a déposé un formulaire 4 signalant une vente en marché libre de 55 000 actions ordinaires (code transaction « S »). Le prix moyen pondéré de vente était de 27,86 $, avec des transactions réalisées entre 27,60 $ et 28,28 $, impliquant un produit brut d'environ 1,53 million de dollars.

Après cette cession, la détention indirecte du trust est tombée à 529 256 actions, soit une baisse d'environ 9 % par rapport à un total estimé à 584 256 actions avant la vente. Aucune transaction sur dérivés n'a été signalée. Le déclarant a mentionné un statut potentiel de groupe avec d'autres actionnaires, mais a nié toute propriété bénéficiaire au-delà de son intérêt pécuniaire, et aucun plan de trading selon la règle 10b5-1 n'a été indiqué.

Bien que les transactions d'initiés ne signalent pas automatiquement un changement fondamental, une vente importante par un gros détenteur peut être interprétée par les investisseurs comme un indicateur de sentiment baissier en l'absence de contexte supplémentaire.

Am 1. August 2025 reichte der Susan Scott Heyneman Trust—als 10% Eigentümer von First Interstate BancSystem (FIBK)—ein Formular 4 ein, das einen Verkauf von 55.000 Stammaktien am offenen Markt meldete (Transaktionscode „S“). Der gewichtete Durchschnittspreis lag bei 27,86 $, mit Trades zwischen 27,60 $ und 28,28 $, was einen Bruttoerlös von etwa 1,53 Millionen $ impliziert.

Nach dem Verkauf sank der indirekte Besitz des Trusts auf 529.256 Aktien, was einem Rückgang von etwa 9 % gegenüber geschätzten 584.256 Aktien vor dem Verkauf entspricht. Es wurden keine Derivatgeschäfte gemeldet. Der Einreicher wies auf einen möglichen Gruppenstatus mit anderen Aktionären hin, bestritt jedoch eine wirtschaftliche Eigentümerschaft über sein finanzielles Interesse hinaus, und es wurde kein Handelsplan nach Regel 10b5-1 angegeben.

Obwohl Insider-Transaktionen nicht automatisch eine Änderung der Fundamentaldaten signalisieren, kann ein größerer Verkauf durch einen Großaktionär von Investoren ohne weiteren Kontext als negatives Stimmungszeichen interpretiert werden.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees

(Last) (First) (Middle)
P.O. BOX 7113

(Street)
BILLINGS, MT 59116

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
FIRST INTERSTATE BANCSYSTEM INC [ FIBK ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
08/01/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/01/2025 S 55,000 D $27.86(3) 529,256(1) I See Footnote(2)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. Composed of 529,256 shares held of record by Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees.
2. 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.
3. 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.
SUSAN SCOTT HEYNEMAN TRUST, SUSAN HEYNEMAN & FIRST INTERSTATE WEALTH MANAGEMENT CO-TRUSTEES, By: /s/ Timothy Leuthold, Attorney-in-Fact for Reporting Person 08/01/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

How many FIBK shares did the Susan Scott Heyneman Trust sell on 1 Aug 2025?

The trust sold 55,000 common shares of First Interstate BancSystem.

At what price range were the FIBK shares sold?

Shares were sold between $27.60 and $28.28, with a weighted-average price of $27.86.

How many FIBK shares does the trust still own after the sale?

Post-transaction, the trust holds 529,256 shares indirectly.

What percentage of the trust’s prior holdings was sold?

Approximately 9 % of the trust’s estimated 584,256 shares were sold.

Did the Form 4 indicate a Rule 10b5-1 trading plan?

No. The filing did not check the box indicating trades under a 10b5-1 plan.
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