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.
Programmatic advertising can feel like alphabet soup, and Magnite’s filings are no exception. Revenue splits across CTV, online video, display, and audio, while acquisitions and traffic-acquisition costs add layers of jargon that stretch a single 10-K past 300 pages. If you have ever asked, “How do I find Magnite insider trading Form 4 transactions?” or “Where is the Magnite quarterly earnings report 10-Q filing?”, you already know the challenge.
Stock Titan solves it. Our AI-powered summaries turn dense disclosures into clear takeaways—understanding Magnite SEC documents with AI instead of wrestling with footnotes. Get real-time alerts the moment a Magnite Form 4 insider transactions real-time notice hits EDGAR, see trend charts inside every Magnite earnings report filing analysis, and access side-by-side comparisons of segment margins pulled directly from the latest Magnite annual report 10-K simplified.
All SEC materials are covered: 10-Q quarterly updates, 8-K event notices, definitive proxy statements on executive compensation, and even niche exhibits. Need the story behind a sudden CTV partnership? Click the Magnite 8-K material events explained tile. Curious about option grants? The Magnite executive stock transactions Form 4 table is already filtered. From “Magnite proxy statement executive compensation” to “Magnite SEC filings explained simply,” every document is searchable, summarized, and linked—so analysts can monitor competitive positioning, track insider sentiment, and act on data without sifting through PDFs.
Magnite, Inc. (MGNI) insider sale disclosure: The Form 4 filed for Sean Patrick Buckley, President, Revenue, reports two open-market sales totaling 40,000 shares on 09/08/2025 and 09/09/2025. The first sale on 09/08/2025 disposed of 20,000 shares at a weighted-average price of $25.56 and the second on 09/09/2025 disposed of 20,000 shares at a weighted-average price of $24.61. Following these transactions, Mr. Buckley beneficially owns 287,193 shares, down from 307,193 prior to the second sale.
The filing includes footnotes clarifying that each reported price is a weighted average of multiple trades within specified ranges and offers to provide detailed per-trade quantities on request. The Form 4 was signed by an attorney-in-fact on 09/10/2025. No derivative transactions or other changes in beneficial ownership are reported in this filing.
Insider sale notice for Magnite, Inc. (MGNI): This Form 144 reports a proposed sale of 20,000 common shares through Morgan Stanley Smith Barney with an aggregate market value of $492,148.00, with an approximate sale date of 09/09/2025 on NASDAQ. The filing lists recent acquisitions of the shares: purchases via the Employee Stock Purchase Plan on 05/15/2025 and prior ESPP and restricted stock vesting dates between 2023 and 2025. The filer also disclosed sales earlier in September and August 2025 totaling 40,201 shares with gross proceeds shown. The notice includes the signer’s representation of no undisclosed material adverse information.
Insider sale notice for Magnite, Inc. (MGNI). The filing shows a proposed sale of 20,000 common shares through Morgan Stanley Smith Barney with an aggregate market value of $511,214, scheduled approximately on 09/08/2025 on NASDAQ. The filer reports acquiring 14,853 shares on 02/15/2025 and 5,147 shares on 08/15/2025 via restricted stock vesting as compensation. During the past three months the same person sold 10,886 shares on 08/18/2025 for $259,667.02 and 9,315 shares on 08/19/2025 for $218,152.18. The signer certifies they are not aware of any undisclosed material adverse information about the issuer.
Brian Gephart, Chief Accounting Officer of Magnite, Inc. (MGNI), reported the sale of 27,671 shares of common stock on 09/04/2025. The sales were made pursuant to a Rule 10b5-1 trading plan adopted on 06/05/2025. The weighted-average price for the shares sold was reported as $24.71, with individual trade prices ranging from $24.26 to $24.94. After the reported disposition, the filing shows 92,898 shares beneficially owned by the reporting person. The Form 4 was signed by an attorney-in-fact on 09/05/2025.
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. (MGNI) officer sale disclosed on Form 4. Chief Technology Officer David Buonasera reported a sale of 2,950 shares of Magnite common stock on 09/03/2025 at a price of $25.37 per share, leaving him with 238,629 shares beneficially owned following the transaction. The filing states the sale was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 15, 2024. The form was signed by attorney-in-fact Aaron Saltz on 09/04/2025.
Magnite insider exercise and sales under 10b5-1 plan. Adam Lee Soroca, Chief Product Officer, exercised 24,986 vested employee stock options at a $4.92 exercise price on 09/02/2025 and immediately sold those shares in multiple transactions. He sold 9,269 shares at a weighted average price of $24.22 (range $23.74–$24.66) and 15,717 shares at a weighted average price of $24.97 (range $24.78–$25.05), executing the trades pursuant to a Rule 10b5-1 plan adopted May 28, 2025. After these transactions his beneficial ownership decreased from 371,379 to 346,393 shares. The options exercised were fully vested and the underlying shares were granted as compensation.
Magnite, Inc. (MGNI) filing a Form 144 notifies the market that 27,671 shares of common stock held by the selling person will be offered for sale through Morgan Stanley Smith Barney LLC on 09/04/2025 on NASDAQ. The filing reports an aggregate market value of $683,849.80 based on the planned sale and notes total shares outstanding of 142,399,305. The shares were acquired as restricted stock from the issuer on 08/15/2022. The filer also reported a recent sale of 2,961 shares on 08/18/2025 for $70,629.62. The notice includes the standard representation that the seller is not aware of any undisclosed material adverse information.
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.
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