MGNI furnishes Q3 2025 results via 8-K, Exhibit 99.1

Rhea-AI Filing Summary

Magnite, Inc. furnished an 8‑K announcing financial results for the quarter ended September 30, 2025. The company issued a press release on November 5, 2025, which is attached as Exhibit 99.1.

The press release is furnished, not filed, and therefore is not subject to Section 18 liabilities and is not incorporated by reference unless specifically referenced.

8-K Event Classification

2 items: 2.02, 9.01

2 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

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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

November 5, 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, 9th 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 (see General Instruction A.2. below):

☐ 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 on 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 2.02. Results of Operations and Financial Condition.

    On November 5, 2025, Magnite, Inc., or the Company, issued a press release announcing financial results for its fiscal quarter ended September 30, 2025. The full text of the press release issued in connection with the announcement is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

    The information in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Item 9.01. Financial Statements and Exhibits.

(d)Exhibits

The following exhibit relating to Item 2.02 shall be deemed to be furnished, and not filed:

Exhibit Number						Description
99.1						Press release dated November 5, 2025
104						Cover Page Interactive Data File (embedded within the Inline XBRL document)

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:

November 5, 2025

By:

/s/ David Day

David Day

Chief Financial Officer

FAQ

What did MGNI disclose in this 8-K?

Magnite furnished a press release announcing financial results for the quarter ended September 30, 2025.

When was the MGNI press release issued?

The press release was issued on November 5, 2025.

Where can I find the detailed results for MGNI?

They are included in Exhibit 99.1 to the 8‑K.

Is the MGNI press release considered filed with the SEC?

No. It was furnished, not filed, and is not subject to Section 18 liabilities.

Who signed the MGNI 8-K?

The 8‑K was signed by David Day, Chief Financial Officer, on November 5, 2025.

What period do the MGNI results cover?

The results cover the fiscal quarter ended September 30, 2025.