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. CEO Michael G. Barrett reported an option exercise and related share sale in Common Stock. He exercised options for 75,000 shares at $5.80 per share and sold 75,000 shares in an open-market transaction at $19.50 per share.
Following these transactions, Barrett holds 403,074 shares of Common Stock directly. The exercise and subsequent sale were carried out under a pre-arranged Rule 10b5-1 trading plan, indicating the trades were scheduled in advance as part of a structured liquidity plan.
Insider reported sales of restricted common stock. The Form 144 excerpt shows multiple dispositions by a reporting person identified as David Buonaser a (address listed) of Common stock on 06/01/2026, 06/15/2026, 06/16/2026, and 06/17/2026. Each line lists the number of shares and a dollar value for the sale transactions under the heading "Securities Sold During The Past 3 Months." The securities are described as Restricted Stock and the transaction source is listed as ISSUER.
MGNI filed a Form 144 notice stating a proposed sale of 8,000 shares of Common Stock (listed with an aggregate amount of $160,000.00).
The filing lists multiple recent dispositions by Adam L. Soroca during May–June 2026; examples include sales of 27,606 shares on 06/01/2026 for $418,014.69 and 42,756 shares on 05/28/2026 for $603,084.95.
Michael G Barrett filed a Form 144 notice to sell 75,000 shares of Common Stock via a stock option exercise on 06/29/2026, using Morgan Stanley Smith Barney LLC as broker. The filing lists cash exercise treatment and shows prior reported sales in June 2026: 100,000 shares on 06/16/2026 and 178,596 shares on 06/15/2026.
Magnite, Inc. officer Sean Patrick Buckley reported an open-market sale of 19,233 shares of Common Stock at $19.00 per share. After this transaction, he directly holds 373,514 shares, indicating he retains a substantial equity position. The filing notes the sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on September 10, 2025, suggesting the trade was scheduled in advance rather than timed opportunistically.
MAGNITE, INC. director Douglas S. Knopper reported an open-market sale of 37,337 shares of common stock on June 16, 2026 at a weighted average price of $18.10 per share, with individual trade prices ranging from $18.00 to $18.25.
The transaction was executed under a pre-arranged Rule 10b5-1 trading plan adopted on December 12, 2025. Following this sale, Knopper directly holds 125,810 shares of Magnite common stock.
MAGNITE, INC. Chief Technology Officer David Buonasera reported open-market sales of company Common Stock over three consecutive days. He sold 1,057 shares at $17.00, 11,233 shares at $18.00, and 1,409 shares at $19.00, totaling 13,699 shares.
Following these transactions, Buonasera directly holds 279,085 shares of Magnite common stock. The filing notes that the reported transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted on September 11, 2025, indicating they were scheduled in advance rather than timed discretionarily.
Magnite, Inc. CEO Michael G. Barrett exercised stock options and sold shares in paired transactions disclosed on this Form 4. On June 15, 2026, he exercised options to acquire 178,596 shares of common stock at a $5.80 exercise price and sold 178,596 shares in open‑market transactions at a weighted average price of $16.59, with individual trades ranging from $15.945 to $16.93. On June 16, 2026, he exercised options to acquire an additional 100,000 shares at $5.80 and sold 100,000 shares at $17.50 per share. The filing reports that these exercises and subsequent sales were made pursuant to a pre‑arranged Rule 10b5‑1 trading plan adopted on March 13, 2026. Following the transactions, Barrett directly holds 403,074 shares of Magnite common stock, with the reported options fully vested and immediately exercisable before their stated expiration date of March 17, 2027.
Adam L. Soroca reported proposed and recent sales of common stock via a Form 144. The filing lists multiple completed sales in May–June 2026, including specific transactions such as 06/16/2026 — 6,000 shares for $108,000.00 and other dated disposals. The document also lists restricted shares vested under a registered plan on 05/15/2022, 02/15/2023, and 05/15/2023.