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 insider sale to cover taxes: Chief Accounting Officer Brian Gephart reported a non-discretionary sale of 2,961 shares of Magnite, Inc. (MGNI) on 08/18/2025 at $23.85 per share to satisfy tax withholding tied to the settlement of vested Restricted Stock Units. After the transaction, the reporting person beneficially owned 120,569 shares, held directly. The filing states the sale was mandated by the issuer's sell-to-cover election and was not a discretionary trade by the reporting person. The Form 4 was executed by an attorney-in-fact and contains no derivative transactions or other purchases.
Day David, reported as Chief Financial Officer of Magnite, Inc. (MGNI), sold 13,366 shares of common stock on 08/18/2025 at a price of $23.85 per share. The filing states the sale was executed to satisfy the reporting persons tax withholding obligation arising from the settlement of vested Restricted Stock Units and was a mandatory "sell to cover" transaction elected by the issuer. After the sale, the reporting person beneficially owns 382,106 shares, held directly.
Adam Lee Soroca, Chief Product Officer of Magnite, Inc. (MGNI), reported two non-discretionary sales of company common stock on 08/18/2025 and 08/19/2025. On 08/18/2025 he sold 9,700 shares at $23.85 per share to satisfy tax withholding from vested restricted stock units. On 08/19/2025 he sold 10,579 shares at a weighted average price of $23.47 pursuant to a Rule 10b5-1 trading plan adopted on March 7, 2025. The filings show beneficial ownership of 356,972 shares after the 08/18 sale and 346,393 shares after the 08/19 sale. The Form 4 was signed via attorney-in-fact on 08/20/2025.
Katie Seitz Evans, President, Operations at Magnite, Inc. (MGNI), reported a non-discretionary sale of company stock on 08/18/2025. She disposed of 10,487 shares of common stock at $23.85 per share as part of a "sell to cover" to satisfy tax withholding obligations from the settlement of vested restricted stock units. After the transaction she beneficially owned 423,943 shares.
The filing notes the sale was mandated by the issuer's election to require withholding via sale and was not a discretionary trade by the reporting person. The Form 4 was signed on behalf of the reporting person by an attorney-in-fact.
Magnite insider sale to cover taxes. Aaron Saltz, Chief Legal Officer of Magnite, sold 5,770 shares of common stock on 08/18/2025 at $23.85 per share to satisfy tax withholding obligations associated with vested restricted stock units. The sale was a company-mandated "sell-to-cover" and not a discretionary trade by the reporting person. After the transaction, Saltz beneficially owns 242,184 shares, held directly. The Form 4 discloses routine compliance with tax withholding related to equity compensation and provides transparent reporting of the officer's post-transaction ownership.
Magnite, Inc. director and CEO Michael G. Barrett reported a non-discretionary sale of 35,951 shares of common stock on 08/18/2025 at a price of $23.85 per share. The filing states the shares were sold to satisfy the reporting person’s tax withholding obligations arising from the settlement of vested Restricted Stock Units; the sale was mandated by the issuer’s sell-to-cover election and not a discretionary trade. After the transaction, the reporting person beneficially owned 249,857 shares, held directly. The Form 4 was signed by an attorney-in-fact on 08/20/2025.
Magnite insider sales by President, Revenue Sean Patrick Buckley reported two non-derivative sales of Common Stock: 10,886 shares sold on 08/18/2025 at a weighted average price of $23.85 and 9,315 shares sold on 08/19/2025 at a weighted average price of $23.42, leaving the reporting person with 336,508 and then 327,193 shares beneficially owned after each transaction respectively. The filing states the first sale was to satisfy tax withholding on vested restricted stock units and was not discretionary. The second sale was executed under a Rule 10b5-1 trading plan adopted on November 24, 2023. The filer signed by attorney-in-fact.
Magnite insider sale to cover taxes from vested RSUs. David Buonasera, Chief Technology Officer, reported a sale of 7,834 shares of Magnite, Inc. (MGNI) on 08/18/2025 at a price of $23.85 per share. The filing states the sale was executed to satisfy tax-withholding obligations arising from the settlement of vested Restricted Stock Units and was mandated by the issuer's sell-to-cover election rather than a discretionary decision by the reporting person. After the transaction Buonasera beneficially owned 241,579 shares, held directly. The Form 4 was signed by attorney-in-fact Aaron Saltz on 08/20/2025.
David Day, Chief Financial Officer of Magnite, Inc. (MGNI), reported a sale of 26,374 shares of common stock on 08/15/2025. After the reported disposition, he beneficially owned 395,472 shares. The Form 4 was signed by an attorney-in-fact on 08/19/2025. The filing indicates the transaction code G and a reported price of $0 for the disposed shares as stated on the form.
Magnite, Inc. (MGNI) filed a Form 144 disclosing a proposed sale of 10,579 restricted common shares through Morgan Stanley Smith Barney LLC, with an aggregate market value of $248,330.39. The filing lists the approximate date of sale as 08/19/2025 and the exchange as NASDAQ. The shares were acquired as restricted stock from the issuer on 08/15/2025 and payment or consideration is marked as Not Applicable.
The filing also lists multiple prior sales by the same person during the past three months, including transactions on 08/18/2025, 07/03/2025, 06/24/2025, 06/06/2025, and 05/20/2025, with gross proceeds reported for each sale.