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[SCHEDULE 13G/A] NorthWestern Energy Group, Inc. SEC Filing

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13G/A
Rhea-AI Filing Summary

American Century Investment Management, Inc., American Century Companies, Inc., and the Stowers Institute for Medical Research report they beneficially own 2,952,214 shares of Northwestern Energy Group, Inc., representing 4.8% of the outstanding common stock. The filers disclose sole voting power over 2,838,388 shares and sole dispositive power over 2,952,214 shares. The filing states these securities are held in the ordinary course of business and were not acquired to change or influence control of the issuer.

The filing also clarifies that ACIM is a wholly owned subsidiary of ACC and that ACC is controlled by the Stowers Institute, explaining the relationship among the reporting entities and their shared disclosure.

American Century Investment Management, Inc., American Century Companies, Inc. e lo Stowers Institute for Medical Research dichiarano di possedere di fatto 2,952,214 azioni di Northwestern Energy Group, Inc., pari al 4.8% del capitale sociale in circolazione. I firmatari indicano il potere di voto esclusivo su 2,838,388 azioni e il potere dispositivo esclusivo su 2,952,214 azioni. La comunicazione precisa che tali titoli sono detenuti nell'ambito dell'ordinaria attività commerciale e non sono stati acquisiti per modificare o influenzare il controllo dell'emittente.

La comunicazione chiarisce inoltre che ACIM è una controllata interamente posseduta da ACC e che ACC è controllata dallo Stowers Institute, spiegando la relazione tra gli enti dichiaranti e la loro disclosure congiunta.

American Century Investment Management, Inc., American Century Companies, Inc. y el Stowers Institute for Medical Research informan que son propietarios beneficiarios de 2,952,214 acciones de Northwestern Energy Group, Inc., lo que representa el 4.8% del capital social en circulación. Los declarantes revelan tener poder de voto exclusivo sobre 2,838,388 acciones y poder dispositivo exclusivo sobre 2,952,214 acciones. La presentación indica que estos valores se mantienen en el curso ordinario del negocio y no fueron adquiridos para cambiar o influir en el control del emisor.

El documento aclara además que ACIM es una subsidiaria propiedad total de ACC y que ACC está controlada por el Stowers Institute, explicando la relación entre las entidades informantes y su declaración conjunta.

American Century Investment Management, Inc., American Century Companies, Inc. � Stowers Institute for Medical Research� Northwestern Energy Group, Inc.� 실질� 보유 주식 수가 2,952,214주로 발행 보통� 총수� 4.8%� 해당한다� 보고합니�. 제출자들은 2,838,388주에 대� 단독 의결권을 보유하며 2,952,214주에 대� 단독 처분권을 보유하고 있다� 공개했습니다. 제출서류� � 증권들이 영업� 통상적인 과정에서 보유되고 있으� 발행사의 지배권� 변경하거나 영향력을 행사하기 위해 취득� 것이 아니라고 명시합니�.

또한 제출서류� ACIM� ACC� 전액 출자 자회사이� ACC� Stowers Institute� 지배를 받고 있음� 밝히�, 보고 법인� 간의 관계와 공동 공개� 사유� 설명합니�.

American Century Investment Management, Inc., American Century Companies, Inc. et le Stowers Institute for Medical Research déclarent détenir en bénéficiaire effectif 2,952,214 actions de Northwestern Energy Group, Inc., représentant 4.8% du capital social en circulation. Les déposants indiquent disposer du droit de vote exclusif sur 2,838,388 actions et du pouvoir exclusif de disposer de 2,952,214 actions. Le dépôt précise que ces titres sont détenus dans le cours normal des affaires et n'ont pas été acquis en vue de modifier ou d'influencer le contrôle de l'émetteur.

Le dépôt précise également qu'ACIM est une filiale détenue intégralement par ACC et que ACC est contrôlée par le Stowers Institute, expliquant la relation entre les entités déclarantes et leur communication conjointe.

American Century Investment Management, Inc., American Century Companies, Inc. und das Stowers Institute for Medical Research geben an, wirtschaftlich Inhaber von 2,952,214 Aktien der Northwestern Energy Group, Inc. zu sein, was 4.8% des ausstehenden Stammkapitals entspricht. Die Meldenden legen offen, dass sie über 2,838,388 Aktien ausschließliches Stimmrecht und über 2,952,214 Aktien ausschließliches Verfügungsrecht besitzen. Die Meldung führt aus, dass diese Wertpapiere im gewöhnlichen Geschäftsverlauf gehalten werden und nicht erworben wurden, um die Kontrolle über den Emittenten zu ändern oder zu beeinflussen.

Die Meldung stellt außerdem klar, dass ACIM eine hundertprozentige Tochtergesellschaft von ACC ist und dass ACC vom Stowers Institute kontrolliert wird, und erläutert damit die Beziehung zwischen den meldenden Stellen und die gemeinsame Offenlegung.

Positive
  • Disclosure of beneficial ownership of 2,952,214 shares (4.8%), increasing transparency for investors
  • Sole voting power over 2,838,388 shares and sole dispositive power over 2,952,214 shares is clearly stated
  • Filing affirms shares are held in the ordinary course and not to influence control, reducing activist concern
  • Clarifies corporate relationship (ACIM is a wholly-owned subsidiary of ACC; ACC is controlled by Stowers Institute)
Negative
  • None.

Insights

TL;DR: A sub-5% passive stake disclosed; ownership is sizable but not control-oriented.

The report shows combined beneficial ownership of 2,952,214 shares (4.8%), with 2,838,388 shares subject to sole voting power. For most investors this represents a meaningful institutional holding but remains below the 5% threshold that often triggers heightened market or governance attention. The declaration that holdings are in the ordinary course and not intended to influence control reduces the likelihood of activist intent. The parent/subsidiary relationship between ACC and ACIM is disclosed, clarifying reporting attribution.

TL;DR: Disclosure improves governance transparency; no material control implications.

The Schedule 13G amendment provides clear attribution of beneficial ownership among ACIM, ACC and the Stowers Institute, and documents voting and dispositive powers. Because the position is under 5% and the filers certify the holdings are not for the purpose of changing control, this filing is governance-relevant but not materially disruptive. The filing aids investor awareness of institutional exposure without signaling imminent board or control actions.

American Century Investment Management, Inc., American Century Companies, Inc. e lo Stowers Institute for Medical Research dichiarano di possedere di fatto 2,952,214 azioni di Northwestern Energy Group, Inc., pari al 4.8% del capitale sociale in circolazione. I firmatari indicano il potere di voto esclusivo su 2,838,388 azioni e il potere dispositivo esclusivo su 2,952,214 azioni. La comunicazione precisa che tali titoli sono detenuti nell'ambito dell'ordinaria attività commerciale e non sono stati acquisiti per modificare o influenzare il controllo dell'emittente.

La comunicazione chiarisce inoltre che ACIM è una controllata interamente posseduta da ACC e che ACC è controllata dallo Stowers Institute, spiegando la relazione tra gli enti dichiaranti e la loro disclosure congiunta.

American Century Investment Management, Inc., American Century Companies, Inc. y el Stowers Institute for Medical Research informan que son propietarios beneficiarios de 2,952,214 acciones de Northwestern Energy Group, Inc., lo que representa el 4.8% del capital social en circulación. Los declarantes revelan tener poder de voto exclusivo sobre 2,838,388 acciones y poder dispositivo exclusivo sobre 2,952,214 acciones. La presentación indica que estos valores se mantienen en el curso ordinario del negocio y no fueron adquiridos para cambiar o influir en el control del emisor.

El documento aclara además que ACIM es una subsidiaria propiedad total de ACC y que ACC está controlada por el Stowers Institute, explicando la relación entre las entidades informantes y su declaración conjunta.

American Century Investment Management, Inc., American Century Companies, Inc. � Stowers Institute for Medical Research� Northwestern Energy Group, Inc.� 실질� 보유 주식 수가 2,952,214주로 발행 보통� 총수� 4.8%� 해당한다� 보고합니�. 제출자들은 2,838,388주에 대� 단독 의결권을 보유하며 2,952,214주에 대� 단독 처분권을 보유하고 있다� 공개했습니다. 제출서류� � 증권들이 영업� 통상적인 과정에서 보유되고 있으� 발행사의 지배권� 변경하거나 영향력을 행사하기 위해 취득� 것이 아니라고 명시합니�.

또한 제출서류� ACIM� ACC� 전액 출자 자회사이� ACC� Stowers Institute� 지배를 받고 있음� 밝히�, 보고 법인� 간의 관계와 공동 공개� 사유� 설명합니�.

American Century Investment Management, Inc., American Century Companies, Inc. et le Stowers Institute for Medical Research déclarent détenir en bénéficiaire effectif 2,952,214 actions de Northwestern Energy Group, Inc., représentant 4.8% du capital social en circulation. Les déposants indiquent disposer du droit de vote exclusif sur 2,838,388 actions et du pouvoir exclusif de disposer de 2,952,214 actions. Le dépôt précise que ces titres sont détenus dans le cours normal des affaires et n'ont pas été acquis en vue de modifier ou d'influencer le contrôle de l'émetteur.

Le dépôt précise également qu'ACIM est une filiale détenue intégralement par ACC et que ACC est contrôlée par le Stowers Institute, expliquant la relation entre les entités déclarantes et leur communication conjointe.

American Century Investment Management, Inc., American Century Companies, Inc. und das Stowers Institute for Medical Research geben an, wirtschaftlich Inhaber von 2,952,214 Aktien der Northwestern Energy Group, Inc. zu sein, was 4.8% des ausstehenden Stammkapitals entspricht. Die Meldenden legen offen, dass sie über 2,838,388 Aktien ausschließliches Stimmrecht und über 2,952,214 Aktien ausschließliches Verfügungsrecht besitzen. Die Meldung führt aus, dass diese Wertpapiere im gewöhnlichen Geschäftsverlauf gehalten werden und nicht erworben wurden, um die Kontrolle über den Emittenten zu ändern oder zu beeinflussen.

Die Meldung stellt außerdem klar, dass ACIM eine hundertprozentige Tochtergesellschaft von ACC ist und dass ACC vom Stowers Institute kontrolliert wird, und erläutert damit die Beziehung zwischen den meldenden Stellen und die gemeinsame Offenlegung.






Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)






SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G



American Century Investment Management, Inc.
Signature:American Century Investment Management, Inc.
Name/Title:/s/ John Pak / Senior Vice President
Date:08/14/2025
American Century Companies, Inc.
Signature:American Century Companies, Inc.
Name/Title:/s/ John Pak / Senior Vice President
Date:08/14/2025
Stowers Institute for Medical Research
Signature:Stowers Institute for Medical Research
Name/Title:/s/ Joselyn Verschelden / Authorized Signer
Date:08/14/2025
Exhibit Information

EXHIBIT Each of the undersigned hereby agrees and consents to the execution and joint filing on its behalf by American Century Investment Management, Inc. of this Schedule 13G respecting the beneficial ownership of the securities which are the subject of this schedule. Dated this 14th day of August, 2025. AMERICAN CENTURY INVESTMENT MANAGEMENT, INC. ("ACIM") AMERICAN CENTURY COMPANIES, INC. ("ACC") By: __/s/ John Pak_____________ John Pak Senior Vice President, ACIM and ACC STOWERS INSTITUTE FOR MEDICAL RESEARCH, solely in its capacity as control entity of ACC By: __/s/ Joselyn Verschelden_______ Joselyn Verschelden Authorized Signer

FAQ

How many Northwestern Energy Group (NWE) shares do American Century and affiliates report owning?

The filers report beneficial ownership of 2,952,214 shares, representing 4.8% of NWE's common stock.

What voting and dispositive powers are reported in the NWE Schedule 13G/A?

The filing reports sole voting power over 2,838,388 shares and sole dispositive power over 2,952,214 shares.

Are the reported NWE shares held to influence control of the company?

No. The filers certify the securities are held in the ordinary course of business and were not acquired to change or influence control of the issuer.

Which entities are parties to this Schedule 13G/A for NWE?

The filing is by American Century Investment Management, Inc., American Century Companies, Inc., and the Stowers Institute for Medical Research.

How are the reporting entities related in the NWE filing?

The filing states ACIM is a wholly-owned subsidiary of ACC, and ACC is controlled by the Stowers Institute, explaining attribution of the reported holdings.
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