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. insider Douglas Knopper filed to potentially sell shares of the company’s common stock. The notice lists 19,128 shares of common stock associated with restricted stock units granted on 06/07/2022 and indicates use of Morgan Stanley Smith Barney LLC Executive Financial Services as broker. It also reports prior Rule 10b5-1 plan sales of common stock, including 37,337 shares for $675,799.70 on 06/16/2026 and 10,766 shares for $169,391.17 on 06/10/2026.
A Form 144 filing related to MGNI reports a proposed sale of up to 18,209 shares of common stock through Morgan Stanley Smith Barney LLC Executive Financial Services, with a notation date of 08/06/2026. The securities derive from Restricted Stock Units originally dated 11/06/2019. The filing also lists prior Rule 10b5-1 sales for Douglas Knopper over the past three months, totaling 37,337 shares for $675,799.70 on 06/16/2026 and 10,766 shares for $169,391.17 on 06/10/2026.
David Buonasera filed to sell 7,649 shares of common stock of MGNI through Morgan Stanley Smith Barney LLC Executive Financial Services, with an indicated value of $179,459.56. These shares were acquired as restricted stock from the issuer on 08/15/2024. In the past three months, Buonasera has already sold multiple common share blocks, including 9,376 shares for $187,520.00 on 07/01/2026 and 11,233 shares for $202,194.00 on 06/16/2026, along with several smaller transactions.
Magnite, Inc. (MGNI) has a notice from Michael G. Barrett covering a proposed sale of up to 293,968 shares of common stock, to be effected through Morgan Stanley Smith Barney LLC’s Executive Financial Services, following a stock option exercise, with a proposed sale date of August 6, 2026 on NASDAQ.
The filing also lists prior sales in the last three months: 38,596 shares for $785,509.65 on July 15, 2026; 75,000 shares for $1,462,500.00 on June 29, 2026; 100,000 shares for $1,750,000.00 on June 16, 2026; and 178,596 shares for $2,962,061.65 on June 15, 2026.
FMR LLC reported beneficial ownership of 7,759,425.80 shares of MAGNITE INC common stock, representing 5.4% of the class, as of June 30, 2026. FMR LLC reports sole dispositive power over all 7,759,425.80 shares and sole voting power over 7,755,677.00 shares, with no shared voting or dispositive power.
Abigail P. Johnson is separately reported with sole dispositive power over the same 7,759,425.80 shares and no voting or shared powers. One or more other persons have rights to dividends or sale proceeds from these shares, but no such person holds more than five percent of MAGNITE INC’s outstanding common stock.
Magnite, Inc. reported strong results for the quarter ended June 30, 2026, with revenue of $192.8 million, up 11% year-over-year. Contribution ex-TAC rose to $189.6 million, up 17%, including CTV contribution ex-TAC of $97.1 million, up 36%, and DV+ of $92.5 million, up 2%.
Net income was $19.4 million, or $0.13 per diluted share, compared with $11.1 million, or $0.08, a year earlier. Adjusted EBITDA increased to $70.6 million, up 30%, for a 37% Adjusted EBITDA margin. Non-GAAP earnings per share were $0.26, and operating cash flow was $57.4 million.
For Q3 2026, the company expects total Contribution ex-TAC between $188 million and $192 million. For full-year 2026, it raised guidance, targeting Contribution ex-TAC growth of 13%–14%, Adjusted EBITDA growth above 20%, an Adjusted EBITDA margin of at least 37%, and free cash flow growth in the high 40% range.
Magnite CEO Michael G. Barrett exercised employee stock options for 38,596 shares at $5.80 per share and sold 38,596 common shares at a weighted average price of $20.35 on July 15, 2026 under a Rule 10b5-1 plan adopted March 13, 2026. After these trades, he holds 403,074 common shares and 293,968 remaining stock options expiring March 17, 2027.
MGNI shareholder Michael G Barrett filed a notice to sell 38,596 shares of common stock, with an indicated value of $785,509.65, through Morgan Stanley Smith Barney LLC Executive Financial Services on or after July 15, 2026 on NASDAQ.
The shares are to be acquired from the issuer via a stock option exercise paid in cash on July 15, 2026. The filing also lists sales during the past three months, including 75,000, 100,000 and 178,596 shares of common stock on June 29, June 16 and June 15, 2026, respectively, for consideration of $1,462,500.00, $1,750,000.00 and $2,962,061.65.