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.
Form 144 filed for Magnite, Inc. (MGNI) discloses a proposed sale of 2,950 restricted common shares acquired from the issuer on 08/15/2024. The seller lists a broker as Morgan Stanley Smith Barney LLC and values the proposed sale at $74,841.50 with an approximate sale date of 09/03/2025 on NASDAQ. The filing also reports recent sales by the same person: 7,834 shares sold on 08/18/2025 for $186,866.75 and 9,289 shares sold on 06/30/2025 for $204,358.00. The filing shows 142,399,305 shares outstanding and includes the seller's declaration regarding absence of undisclosed material information.
Insider sale notice: This Form 144 by an issuer of record for Magnite, Inc. (MGNI) reports a proposed sale of 24,986 common shares through Morgan Stanley Smith Barney LLC on 09/02/2025 with an aggregate market value of $616,884.51. The filer reports those shares were acquired the same day, 09/02/2025, via stock option exercise and paid for in cash. The filing also discloses recent open-market dispositions by Adam L. Soroca totaling 116,710 shares sold across five transactions between 06/06/2025 and 08/19/2025, generating gross proceeds shown per trade. The notice includes the required attestation that the seller is not aware of undisclosed material adverse information.
Aaron Saltz, Chief Legal Officer of Magnite, Inc. (MGNI), reported a sale of 12,403 shares of Magnite common stock on 08/29/2025 at a reported price of $26.07 per share, reducing his direct beneficial ownership to 229,781 shares. The filing is a Form 4 statement of changes in beneficial ownership and is signed by Mr. Saltz.
Magnite, Inc. (MGNI) reporting person Katie Seitz Evans, President, Operations, reported an insider sale. On 08/27/2025 Ms. Evans disposed of 21,509 shares of Magnite common stock at a weighted average price of $25.52 per share (sales occurred at prices ranging from $25.52 to $25.58). After the transaction she beneficially owned 394,089 shares. The Form 4 was filed as a single reporting person form and signed by an attorney-in-fact, Aaron Saltz, on 08/29/2025. The filer offered to provide the breakdown of shares sold at each price on request.
Magnite, Inc. (MGNI) Form 144 summary: This notice reports a proposed sale under Rule 144 of 12,403 common shares through Morgan Stanley Smith Barney, with an aggregate market value of $323,399.54. The shares were originally acquired as restricted stock on 02/14/2021 from the issuer and were fully paid on that date. The filer (identified in prior transactions as Aaron Saltz) has disclosed multiple recent open-market sales during June–August 2025 totaling 69,325 shares with gross proceeds shown for each trade. The filing includes the standard representation that the seller is not aware of undisclosed material adverse information about the issuer.
Form 144 filed for Magnite, Inc. (MGNI) shows a proposed sale of 21,509 common shares through Morgan Stanley Smith Barney with an aggregate market value of $548,952.70, to be sold approximately on 08/27/2025 on NASDAQ. The filing discloses prior restricted stock acquisitions dated 02/14/2022, 04/01/2022 and 02/14/2023 totaling 21,509 shares acquired from the issuer and paid in full on acquisition dates. The filing also lists sales by Katheryn Evans totaling 98,327 common shares during June–August 2025 with gross proceeds disclosed per trade.
Magnite, Inc. (MGNI) director Diane Yu reported the sale of 20,000 shares on 08/26/2025 at a weighted average price of $25.23, reducing her direct holdings to 67,481 shares. The Form 4 shows the sale was executed in multiple transactions with prices ranging from $25.18 to $25.265 and discloses that the filer will provide transaction-level details on request.
The filing is a routine Section 16 disclosure of a director sale; it was signed by an attorney-in-fact on 08/27/2025. No derivative transactions or other changes in beneficial ownership are reported in this Form 4.
Magnite, Inc. (MGNI) director Paul Caine sold 7,500 shares of common stock on 08/25/2025 at $25.00 per share under a Rule 10b5-1 trading plan adopted on 08/15/2024. After the reported sale, the filing shows Mr. Caine beneficially owns 171,103 shares, reported in a Form 4 filed as an individual reporting person. The transaction is coded S(1) indicating a sale pursuant to a pre-established trading arrangement. The Form 4 was executed by attorney-in-fact Aaron Saltz on 08/26/2025.
Magnite, Inc. (MGNI) insider sale disclosed on Form 4. The reporting person, Katie Seitz Evans (President, Operations), sold 8,345 shares of common stock on 08/25/2025 at $26 per share under a Rule 10b5-1 trading plan that was adopted on March 6, 2025. After the sale she beneficially owned 415,598 shares, reported as direct ownership. The Form 4 was signed by attorney-in-fact Aaron Saltz on 08/26/2025. The filing documents a planned disposition under an established trading plan rather than an ad hoc transaction.
Magnite, Inc. (MGNI) insider intends to sell 20,000 shares on NASDAQ through Morgan Stanley Smith Barney LLC, representing an aggregate market value of $504,616. The shares to be sold are a small fraction of the company's reported outstanding shares of 142,399,305, so the transaction size is modest relative to the company.
The securities were originally acquired as restricted stock: 13,743 shares on 06/12/2024 and 6,257 shares on 06/07/2023, with payment dates matching acquisition dates. No other sales by the reporting person in the past three months are reported, and the filer certifies no undisclosed material adverse information.