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. (NASDAQ: MGNI) files a range of reports and disclosures with the U.S. Securities and Exchange Commission, providing investors with detailed information about its operations as an independent sell-side advertising company. This page aggregates Magnite’s SEC filings and pairs them with AI-powered tools to help readers interpret complex regulatory documents.
Magnite’s recent Form 8-K filings illustrate how the company communicates material events. For example, it has furnished press releases announcing financial results for quarters ended June 30 and September 30, 2025 under Item 2.02, and it has disclosed the filing of a lawsuit against Google LLC under Item 7.01, along with related risk factor updates under Item 8.01. Another 8-K describes a material definitive agreement amending a sublease to expand leased premises.
Through this page, users can quickly access Magnite’s current reports on Form 8-K, as well as its periodic reports such as annual reports on Form 10-K and quarterly reports on Form 10-Q, which are referenced in its forward-looking statements and risk factor discussions. These filings provide insight into Magnite’s financial condition, non-GAAP metrics like Contribution ex-TAC and Adjusted EBITDA as described in its earnings materials, and the risks it associates with its business and litigation.
AI-powered summaries highlight key points from lengthy filings, helping readers understand sections on results of operations, risk factors, material agreements, and legal proceedings without reading every page. Real-time updates ensure that new filings from EDGAR appear promptly, while dedicated views make it easier to review items such as executive commentary in earnings releases or disclosures related to Magnite’s relationship with major partners like Google. This page is a central resource for analyzing MGNI’s regulatory history and ongoing reporting obligations.
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.
Form 144 notice for Magnite, Inc. (MGNI) shows a proposed sale of 9,315 restricted common shares acquired from the issuer on 08/15/2025. The filing lists Morgan Stanley Smith Barney as the broker and estimates the aggregate market value at $218,152.19. Magnite's outstanding shares are reported as 142,399,305, so the proposed sale represents a small fraction of the total equity. The filer also disclosed a recent sale on 08/18/2025 of 10,886 shares yielding $259,667.02. The notice includes the standard representation that the seller is unaware of undisclosed material adverse information.
Magnite, Inc. insider sale notice: The filer reported a proposed sale of 10,388 common shares, with an aggregate market value of $246,195.60, with the shares listed on NASDAQ. The securities were acquired as restricted stock units and recorded as equity compensation on 08/15/2025. The filing lists the issuer's outstanding common shares at 142,399,305, making the proposed block roughly 0.0073% of outstanding stock. The notice also discloses prior sales by the same person totaling 115,125 shares in the past three months, generating aggregate gross proceeds of $2,422,785.15. The filer affirms no undisclosed material adverse information.
Magnite, Inc. (MGNI) Form 144 filed for proposed sale of 11,391 common shares by Kathryn Evans through Morgan Stanley Smith Barney, with an aggregate market value of $269,966.70 and an approximate sale date of 08/18/2025 on NASDAQ. The shares were acquired as restricted stock units and paid via equity compensation on 08/15/2025. The filing also discloses three prior sales by the same person in the past three months: 24,495 shares on 06/30/2025 for $571,164, 20,000 shares on 06/16/2025 for $370,000, and 35,000 shares on 06/05/2025 for $607,695.50, totaling 79,495 shares and $1,548,859.50 in gross proceeds. The filer certifies no undisclosed material adverse information and notes the sale arises from equity compensation.
Form 144 notice for Magnite, Inc. (MGNI) reporting a proposed sale of 6,265 common shares with an aggregate market value of $148,480.50, scheduled approximately for 08/18/2025. The shares were acquired as restricted stock units on 08/15/2025 and paid via equity compensation. The filer also disclosed four sales in the past three months totaling 63,552 shares for gross proceeds of $1,260,065.06 (sales on 06/04/2025, 06/16/2025, 06/30/2025 and 08/14/2025). The notice includes the standard signer representation that no undisclosed material adverse information is known by the seller.
Magnite, Inc. (MGNI) Form 144: This notice reports a proposed sale of 8,510 shares of common stock held as restricted stock units acquired on 08/15/2025. The shares are to be sold through Morgan Stanley Smith Barney LLC on 08/18/2025 on NASDAQ with an aggregate market value of $201,687.00. The filing shows 142,399,305 shares outstanding for the class.
The filer discloses three prior sales by the same person during the past three months: 9,289 shares on 06/30/2025 (gross proceeds $204,358.00), 8,742 shares on 05/27/2025 (gross proceeds $139,872.00), and 3,653 shares on 05/23/2025 (gross proceeds $54,904.59). The acquisition was via equity compensation (restricted stock unit) and payment was recorded on 08/15/2025.
Magnite, Inc. (MGNI) filed a Form 144 reporting a proposed sale of common stock tied to recent equity compensation. The notice reports 3,217 shares acquired as Restricted Stock Units on 08/15/2025, with an aggregate market value of $76,242.90. The proposed sale is to be handled by Morgan Stanley Smith Barney on the NASDAQ, with an approximate sale date of 08/18/2025. The filing states there were 142,399,305 shares outstanding, and no other sales by the reporting person in the past three months were reported. The filer certifies no undisclosed material adverse information is known.
Magnite, Inc. (MGNI) Rule 144 notice: The filer proposes to sell 14,461 shares of common stock, to be handled by Morgan Stanley Smith Barney LLC, with an approximate aggregate market value of $342,725.70 and an approximate sale date of 08/18/2025 on NASDAQ. The securities were acquired as restricted stock units from the issuer on 08/15/2025 and the stated payment/nature is equity compensation. The filing also discloses an earlier sale by Sean Buckley of 9,692 shares on 05/16/2025 for $152,491.04. By signing, the seller represents they are not aware of any undisclosed material adverse information about the issuer.
Magnite, Inc. (MGNI) Form 144 filing reports proposed and recent insider sales. An insider plans to sell 14,518 common shares via Morgan Stanley on or about 08/18/2025; those shares were acquired as restricted stock units on 08/15/2025 and will be settled as equity compensation. The filing also discloses four prior sales by the same person in June 2025 totaling 130,828 shares for aggregate gross proceeds of $2,652,320.70. The issuer’s total shares outstanding listed is 142,399,305, so the proposed sale represents a small fraction of outstanding stock. The filer certifies no undisclosed material adverse information is known.