Welcome to our dedicated page for Magnite SEC filings (Ticker: MGNI), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Magnite, Inc. (NASDAQ: MGNI) files a range of reports and disclosures with the U.S. Securities and Exchange Commission, providing investors with detailed information about its operations as an independent sell-side advertising company. This page aggregates Magnite’s SEC filings and pairs them with AI-powered tools to help readers interpret complex regulatory documents.
Magnite’s recent Form 8-K filings illustrate how the company communicates material events. For example, it has furnished press releases announcing financial results for quarters ended June 30 and September 30, 2025 under Item 2.02, and it has disclosed the filing of a lawsuit against Google LLC under Item 7.01, along with related risk factor updates under Item 8.01. Another 8-K describes a material definitive agreement amending a sublease to expand leased premises.
Through this page, users can quickly access Magnite’s current reports on Form 8-K, as well as its periodic reports such as annual reports on Form 10-K and quarterly reports on Form 10-Q, which are referenced in its forward-looking statements and risk factor discussions. These filings provide insight into Magnite’s financial condition, non-GAAP metrics like Contribution ex-TAC and Adjusted EBITDA as described in its earnings materials, and the risks it associates with its business and litigation.
AI-powered summaries highlight key points from lengthy filings, helping readers understand sections on results of operations, risk factors, material agreements, and legal proceedings without reading every page. Real-time updates ensure that new filings from EDGAR appear promptly, while dedicated views make it easier to review items such as executive commentary in earnings releases or disclosures related to Magnite’s relationship with major partners like Google. This page is a central resource for analyzing MGNI’s regulatory history and ongoing reporting obligations.
Magnite, Inc. reported an insider equity transaction by its CEO and director. On 11/15/2025, the reporting person disposed of 12,198 shares of Magnite common stock at a price of $14.15 per share. This disposition is identified with transaction code "F," which indicates that the shares were withheld by the company to satisfy tax withholding obligations.
After this tax-related forfeiture tied to the vesting of restricted stock units, the reporting person beneficially owns 237,659 shares of Magnite common stock in direct ownership. The filing notes that the forfeiture was non-discretionary and mandated by Magnite under an arrangement designed to cover the reporting person’s tax liabilities arising from equity compensation.
Magnite, Inc. reported an insider share transaction by its Chief Financial Officer. On 11/15/2025, the CFO disposed of 13,197 shares of common stock at a price of $14.15 per share. The company states this was a non-discretionary forfeiture of shares mandated by Magnite to cover tax withholding obligations related to the vesting of restricted stock units, rather than an open-market sale initiated by the executive. After this tax-related transaction, the reporting person beneficially owns 368,909 shares of Magnite common stock directly.
Magnite, Inc. reported Q3 2025 results, showing higher revenue and profitability. Revenue was $179,494, up from the prior year period, and net income reached $20,058. Diluted EPS was $0.13 on 153,166 weighted-average diluted shares. Income from operations was $25,041, reflecting expense control and higher top-line.
Connected TV remained the largest channel at 49% of revenue, with mobile at 36% and desktop at 15%. U.S. revenue was 75% of total. Operating cash flow for the nine months was $107,711, supporting liquidity alongside cash and equivalents of $482,127. Total debt was $556,265, including the 2024 Term Loan B Facility and Convertible Senior Notes; net interest expense declined year over year following loan repricings.
Magnite also completed the Streamr.ai acquisition for $10.1 million, adding developed technology and $5.7 million of goodwill to support SMB-focused CTV tools.
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.
Magnite (MGNI) insider transaction: A company director reported selling 5,000 shares of common stock on 10/24/2025 at $20 per share, according to a Form 4 filing. Following the sale, the reporting person beneficially owns 153,603 shares, held directly.
The filing notes the sale was executed under a Rule 10b5-1 trading plan adopted on August 15, 2024, which allows pre-scheduled trades. The reporting person filed individually, and the role is disclosed as Director.
The Vanguard Group filed an amended Schedule 13G reporting ownership of 14,654,432 shares of Magnite Inc. common stock, equal to 10.29% of the class. Vanguard reports 0 shares of sole voting power and 972,050 shares of shared voting power, with 13,506,122 shares of sole dispositive power and 1,148,310 shares of shared dispositive power. The filing states these securities are held in the ordinary course of business and not for the purpose of changing or influencing control.
Paul Caine, a director of Magnite, Inc. (MGNI), reported a sale of common stock under a pre-established Rule 10b5-1 plan. On 09/19/2025 the reporting person sold 7,500 shares at $25 per share, reducing his beneficial ownership to 158,603 shares. The filing indicates the trades were executed pursuant to a 10b5-1 trading plan adopted on August 15, 2024, and the Form 4 was signed by an attorney-in-fact on behalf of the reporting person.
Insider sale notice for Magnite, Inc. (MGNI). This Form 144 reports a proposed sale of 7,500 common shares to be executed through Morgan Stanley Smith Barney LLC on 09/19/2025 with an aggregate market value of $179,100. The shares were acquired as restricted stock units on 06/01/2018. The filing notes 142,399,305 shares outstanding for the class. The filer discloses multiple prior 10b5-1 plan sales in the past three months totaling 27,500 shares and gross proceeds shown for each trade. The notice includes the standard representation that the seller is unaware of undisclosed material adverse information.
A MagNite insider, Chief Legal Officer Aaron Saltz, sold 8,522 shares of MAGNITE, INC. (MGNI) on 09/19/2025 at $24.50 per share, reducing his direct holdings to 215,079 shares. The filing states the sale was executed under a Rule 10b5-1 trading plan adopted by the reporting person on March 14, 2025, indicating the transactions were preplanned. No additional derivative transactions or amendments are reported.
Form 144 notice for Magnite, Inc. (MGNI) reports a proposed sale of 8,522 common shares held by Aaron Saltz to be effected on 09/19/2025 through Morgan Stanley Smith Barney LLC on NASDAQ. The shares were acquired as restricted stock from the issuer on 02/15/2023. The filing lists the aggregate market value of the proposed sale as $208,789.00 and notes 142,399,305 shares outstanding for the class. The notice also discloses recent open-market sales by the same person during the past three months on multiple dates with individual gross proceeds shown. The filing includes the standard Rule 144 certification that the seller is not aware of any undisclosed material adverse information.