Magnite Inc SEC Filings

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.

Insider sale disclosed: Aaron Saltz, Chief Legal Officer of Magnite, Inc. (MGNI), reported a sale of 6,180 shares of common stock on 09/15/2025 at a price of $23.94 per share. After the sale, Mr. Saltz beneficially owned 223,601 shares, held directly. The filing states the sale was executed under a Rule 10b5-1 trading plan adopted March 14, 2025.

Magnite, Inc. has filed a lawsuit against Google LLC seeking financial damages and other remedies after a U.S. District Court found Google engaged in unlawful anticompetitive practices in certain ad tech markets. The company warns this litigation is in early stages, carries uncertain timing and outcome, and could be costly and protracted. Magnite notes Google is a major participant, partner and competitor whose actions could materially affect Magnite's revenue and relationships with publishers and advertisers. The company also updates its risk factors to disclose possible retaliatory actions by Google, diversion of management attention and potential reputational harm.

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.