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. filings document the regulatory record of an operating ad technology company focused on sell-side programmatic advertising. Form 8-K reports furnish quarterly and annual results, including revenue, contribution ex-TAC, CTV and DV+ metrics, adjusted EBITDA, cash flow measures, outlook commentary and stock buyback disclosures.
The company’s proxy materials cover annual meeting matters, director elections, executive compensation and stockholder voting procedures. Other filings document executive transitions, material agreements, Regulation FD disclosures and risk-factor updates, including litigation and competitive risks tied to the digital advertising ecosystem.
Magnite, Inc. reported insider transactions by its Chief Product Officer. On 11/15/2025, 9,422 shares of common stock were forfeited at $14.15 per share to cover tax withholding tied to the vesting of restricted stock units, under an arrangement mandated by the company. After this, the officer held 336,971 shares.
On 11/18/2025, the officer sold 10,857 shares of Magnite common stock at a weighted average price of $13.23 per share, with individual sale prices ranging from $13.13 to $13.30. This sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on May 28, 2025. Following the reported sale, the officer directly owned 326,114 shares of Magnite common stock.
Magnite, Inc. (MGNI) reported a routine insider share transaction by its President, Operations. On 11/15/2025, the executive had 10,354 shares of common stock forfeited at a reported price of $14.15 per share. This was a non-discretionary forfeiture required by the company to cover tax withholding obligations tied to the vesting of restricted stock units, meaning the shares were withheld rather than sold on the open market. Following this tax-related forfeiture, the officer beneficially owned 383,735 shares of Magnite common stock in direct form.
Magnite, Inc. (MGNI) reported an insider equity transaction involving its chief technology officer. On 11/15/2025, 7,129 shares of common stock were forfeited in a non-discretionary transaction to cover tax withholding obligations tied to the vesting of restricted stock units. After this tax-related forfeiture, the reporting person beneficially owned 231,824 shares of Magnite common stock. This total includes 324 shares acquired on November 15, 2025 under the company’s Employee Stock Purchase Plan.
Magnite, Inc. (MGNI) reported an insider equity transaction by its Chief Accounting Officer on 11/15/2025. The filing shows a disposition of 3,549 shares of common stock at $14.15 per share, coded as transaction type "F," which indicates shares were withheld by the company to cover tax obligations. These shares were forfeited in connection with the vesting of restricted stock units under a non-discretionary, issuer-mandated arrangement. Following this tax withholding transaction, the reporting officer beneficially owns 89,349 shares of Magnite common stock directly.
Magnite, Inc. insider Aaron Saltz, Chief Legal Officer, reported an administrative share transaction related to equity compensation. On 11/15/2025, 5,695 shares of Magnite common stock were forfeited at a price of $14.15 per share to cover tax withholding obligations arising from the vesting of restricted stock units. After this tax-related forfeiture, Saltz beneficially owned 209,384 shares of Magnite common stock directly. The transaction was characterized as a non-discretionary forfeiture mandated by the company’s arrangement for handling tax obligations on vesting awards.
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.