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[8-K] Magnite, Inc. Reports Material Event

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8-K
Rhea-AI Filing Summary

Magnite, Inc. entered into a First Amendment to its Sublease with Zillow Group, Inc. that is expected to be effective as of November 1, 2025. The amendment expands the leased premises to add the entire 8th floor; prior to the amendment the leased premises consisted of the entire 9th floor. The company states the description in the notice is not complete and is qualified in its entirety by the full First Amendment, which will be filed as an exhibit to Magnite's Quarterly Report for the quarter ended September 30, 2025. No other terms, financial commitments, or lease costs are disclosed in this notice.

Magnite, Inc. ha sottoscritto un Primo Emendamento al proprio subaffitto con Zillow Group, Inc., che dovrebbe entrare in vigore il 1° novembre 2025. L’emendamento amplia i locali in affitto includendo l’intero ottavo piano; prima dell’emendamento i locali affittati corrispondevano all’intero nono piano. La società precisa che la descrizione contenuta nel presente avviso non è esaustiva e che vale integralmente quanto previsto dal Primo Emendamento completo, il quale sarà depositato come allegato al rapporto trimestrale di Magnite relativo al periodo chiuso il 30 settembre 2025. Nessun altro termine, impegno finanziario o costo di locazione è divulgato in questo avviso.

Magnite, Inc. celebró una Primera Enmienda a su Subarriendo con Zillow Group, Inc. que se espera entre en vigor el 1 de noviembre de 2025. La enmienda amplía las instalaciones arrendadas para incluir la planta 8 completa; antes de la enmienda, las instalaciones arrendadas correspondían a la planta 9 completa. La compañía señala que la descripción en este aviso no es completa y queda completamente sujeta al texto íntegro de la Primera Enmienda, que se presentará como anexo al Informe Trimestral de Magnite correspondiente al trimestre cerrado el 30 de septiembre de 2025. En este aviso no se revelan otros términos, compromisos financieros ni costes de arrendamiento.

Magnite, Inc.Zillow Group, Inc.과의 하위임대 계약에 대한 제1차 수정계약을 체결했으며, 이는 2025년 11월 1일부로 효력이 발생할 예정입니다. 해당 수정계약은 임대 구역을 확대하여 8층 전체를 추가합니다. 수정 이전에는 임대 구역이 9층 전체였습니다. 회사는 본 공지의 설명이 완전하지 않으며, 모든 내용은 제1차 수정계약 전문에 의해 전적으로 규정된다고 명시합니다. 해당 수정계약 전문은 2025년 9월 30일로 종료되는 분기 보고서의 첨부문서로 제출될 예정입니다. 본 공지에서는 다른 조건, 재무적 의무 또는 임대 비용은 공개되지 않았습니다.

Magnite, Inc. a conclu un premier avenant à sa sous-location avec Zillow Group, Inc., qui devrait prendre effet le 1er novembre 2025. L’avenant étend les locaux loués pour inclure le 8e étage complet9e étage complet. La société précise que la description figurant dans cet avis n’est pas exhaustive et est intégralement qualifiée par le texte complet du premier avenant, qui sera déposé en annexe du rapport trimestriel de Magnite pour le trimestre clos le 30 septembre 2025. Aucun autre terme, engagement financier ou coût de location n’est divulgué dans cet avis.

Magnite, Inc. hat eine Erste Änderungsvereinbarung zu seinem Untermietvertrag mit Zillow Group, Inc. abgeschlossen, die voraussichtlich ab dem 1. November 2025 wirksam wird. Die Änderung erweitert die angemieteten Räumlichkeiten um das gesamte 8. Stockwerk; vor der Änderung umfassten die angemieteten Räumlichkeiten das gesamte 9. Stockwerk. Das Unternehmen weist darauf hin, dass die Beschreibung in dieser Mitteilung nicht vollständig ist und vollständig durch die gesamte Erste Änderungsvereinbarung vorbehaltlich ist, die als Anlage zum Quartalsbericht von Magnite für das zum 30. September 2025 endende Quartal eingereicht wird. In dieser Mitteilung werden keine weiteren Bedingungen, finanziellen Verpflichtungen oder Mietkosten offengelegt.

Positive
  • Leased space expanded — the First Amendment adds the entire 8th floor to the company's leased premises effective November 1, 2025
  • Formal disclosure commitment — the company will file the full First Amendment as an exhibit to its Quarterly Report for the quarter ended September 30, 2025
Negative
  • None.

Insights

TL;DR Magnite amended its sublease to add the 8th floor, moving from lease of the 9th floor; key economic terms are not disclosed.

The First Amendment materially changes the physical scope of Magnite's leased space by adding the entire 8th floor effective November 1, 2025. The filing provides no details on rent, lease term, operating expenses, termination rights, or tenant improvements, so the financial impact on occupancy costs, headcount capacity, or capital expenditure needs cannot be assessed from this notice alone. The company will file the full amendment as an exhibit to its Quarterly Report for the period ended September 30, 2025, which should disclose the specific contract terms needed to evaluate the materiality to shareholders.

TL;DR The disclosure notifies investors of a lease amendment expanding premises; it lacks financial and contractual detail required to judge materiality.

The 8-K appropriately alerts investors to a contractual amendment that alters leased premises. Because the notice explicitly defers to the full amendment to be filed with the quarterly report, investors should view this as a preliminary disclosure. From a governance and disclosure perspective, timely filing of the exhibit will be necessary to satisfy materiality and transparency standards; until then, the investor impact remains indeterminate based on the information provided.

Magnite, Inc. ha sottoscritto un Primo Emendamento al proprio subaffitto con Zillow Group, Inc., che dovrebbe entrare in vigore il 1° novembre 2025. L’emendamento amplia i locali in affitto includendo l’intero ottavo piano; prima dell’emendamento i locali affittati corrispondevano all’intero nono piano. La società precisa che la descrizione contenuta nel presente avviso non è esaustiva e che vale integralmente quanto previsto dal Primo Emendamento completo, il quale sarà depositato come allegato al rapporto trimestrale di Magnite relativo al periodo chiuso il 30 settembre 2025. Nessun altro termine, impegno finanziario o costo di locazione è divulgato in questo avviso.

Magnite, Inc. celebró una Primera Enmienda a su Subarriendo con Zillow Group, Inc. que se espera entre en vigor el 1 de noviembre de 2025. La enmienda amplía las instalaciones arrendadas para incluir la planta 8 completa; antes de la enmienda, las instalaciones arrendadas correspondían a la planta 9 completa. La compañía señala que la descripción en este aviso no es completa y queda completamente sujeta al texto íntegro de la Primera Enmienda, que se presentará como anexo al Informe Trimestral de Magnite correspondiente al trimestre cerrado el 30 de septiembre de 2025. En este aviso no se revelan otros términos, compromisos financieros ni costes de arrendamiento.

Magnite, Inc.Zillow Group, Inc.과의 하위임대 계약에 대한 제1차 수정계약을 체결했으며, 이는 2025년 11월 1일부로 효력이 발생할 예정입니다. 해당 수정계약은 임대 구역을 확대하여 8층 전체를 추가합니다. 수정 이전에는 임대 구역이 9층 전체였습니다. 회사는 본 공지의 설명이 완전하지 않으며, 모든 내용은 제1차 수정계약 전문에 의해 전적으로 규정된다고 명시합니다. 해당 수정계약 전문은 2025년 9월 30일로 종료되는 분기 보고서의 첨부문서로 제출될 예정입니다. 본 공지에서는 다른 조건, 재무적 의무 또는 임대 비용은 공개되지 않았습니다.

Magnite, Inc. a conclu un premier avenant à sa sous-location avec Zillow Group, Inc., qui devrait prendre effet le 1er novembre 2025. L’avenant étend les locaux loués pour inclure le 8e étage complet9e étage complet. La société précise que la description figurant dans cet avis n’est pas exhaustive et est intégralement qualifiée par le texte complet du premier avenant, qui sera déposé en annexe du rapport trimestriel de Magnite pour le trimestre clos le 30 septembre 2025. Aucun autre terme, engagement financier ou coût de location n’est divulgué dans cet avis.

Magnite, Inc. hat eine Erste Änderungsvereinbarung zu seinem Untermietvertrag mit Zillow Group, Inc. abgeschlossen, die voraussichtlich ab dem 1. November 2025 wirksam wird. Die Änderung erweitert die angemieteten Räumlichkeiten um das gesamte 8. Stockwerk; vor der Änderung umfassten die angemieteten Räumlichkeiten das gesamte 9. Stockwerk. Das Unternehmen weist darauf hin, dass die Beschreibung in dieser Mitteilung nicht vollständig ist und vollständig durch die gesamte Erste Änderungsvereinbarung vorbehaltlich ist, die als Anlage zum Quartalsbericht von Magnite für das zum 30. September 2025 endende Quartal eingereicht wird. In dieser Mitteilung werden keine weiteren Bedingungen, finanziellen Verpflichtungen oder Mietkosten offengelegt.

0001595974FALSE00015959742025-08-312025-08-31

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934

August 31, 2025
Date of Report (Date of earliest event reported)

MAGNITE, INC.
(Exact name of registrant as specified in its charter)

Delaware
001-36384
20-8881738
(State or other jurisdiction of incorporation)
(Commission File Number)
(IRS Employer Identification No.)
1250 Broadway, 15th Floor
New York, New York 10001
(Address of principal executive offices, including zip code)
(212) 243-2769
(Registrant’s telephone number, including area code)
Not applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Common stock, par value $0.00001 per share
MGNI
Nasdaq Global Select Market
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).
Emerging growth company  
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  



Item 1.01.    Entry into a Material Definitive Agreement.
On August 31, 2025, Magnite, Inc. (the “Company”), a Delaware corporation, entered into a First Amendment (“First Amendment”) to the Sublease between Zillow Group, Inc. and the Company, dated September 21, 2021 (the “Sublease”). The First Amendment, which is expected to be effective as of November 1, 2025, among other things, expands the leased premises under the Sublease to add the entire 8th floor to the leased premises, which prior to the First Amendment consisted of the entire 9th floor.
The foregoing description of the First Amendment does not purport to be complete and is qualified in its entirety by reference to the full text of the First Amendment, which will be filed as an exhibit to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2025.



SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

MAGNITE, INC.
Date:
September 5, 2025
By:
/s/ David Day
David Day
Chief Financial Officer

FAQ

What did Magnite (MGNI) disclose in this 8-K?

Magnite disclosed it entered into a First Amendment to its Sublease with Zillow Group that expands the leased premises to include the entire 8th floor, expected effective November 1, 2025.

Does the 8-K state how the amendment affects Magnite's lease costs?

No. The notice does not disclose rent, lease term, operating expenses, or other financial terms.

Where can I find the full text of the First Amendment?

The company will file the full First Amendment as an exhibit to its Quarterly Report for the quarter ended September 30, 2025.

Was the leased premises changed from a different floor?

Yes. Prior to the First Amendment the leased premises consisted of the entire 9th floor; the amendment adds the entire 8th floor.

Is an effective date provided for the amendment?

Yes. The amendment is expected to be effective as of November 1, 2025.
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