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.
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.
Form 144 notice for Magnite, Inc. (MGNI) reports a proposed sale of 39,054 common shares with an aggregate market value of $925,579.80, to be effected approximately on 08/18/2025 on NASDAQ through Morgan Stanley Smith Barney LLC Executive Financial Services.
The filing states the shares were acquired on 08/15/2025 as Restricted Stock Units and paid as equity compensation. The document also lists four prior sales by Michael Barrett during the past three months totaling 446,900 shares for gross proceeds of $8,350,722.60. The signer represents no undisclosed material adverse information.
Aaron Saltz, Chief Legal Officer of Magnite, Inc. (MGNI), reported an insider sale. On 08/14/2025 he disposed of 13,860 shares of Magnite common stock at a weighted average price of $23.34. The filing states the sales occurred at prices ranging from $23.29 to $23.445.
Following the reported transactions, the filing shows the reporting person beneficially owns 247,954 shares. The Form 4 is signed by Aaron Saltz and records the sale as a direct disposition by an officer of the company.
Magnite, Inc. (MGNI) director Rachel Lam reported a sale of common stock on 08/12/2025. The Form 4 shows she disposed of 15,000 shares at a weighted average price of $22.25 per share (transactions ranged from $22.24 to $22.28). After the sale, the reporting person beneficially owned 226,822 shares, reported as direct ownership. The filing was executed by attorney-in-fact Aaron Saltz and dated 08/14/2025. The report indicates routine Section 16 disclosure of an insider sale and includes a footnote offering to provide transaction-level details on request.
Form 144 notice for Magnite, Inc. (MGNI): An affiliate intends to sell 13,860 common shares with an aggregate market value of $323,518.47. The shares represent a small fraction of the issuer's outstanding common stock of 142,399,305 shares and are expected to be sold on or about 08/14/2025 on NASDAQ. The filing identifies Morgan Stanley Smith Barney LLC as the broker through which the sale is to occur.
The specific shares to be sold were acquired through restricted stock awards on 11/15/2023, 02/15/2024, and 05/15/2024, and via the employee stock purchase plan on 08/27/2018 and 08/28/2017. The filer, Aaron Saltz, reported multiple prior dispositions in June 2025 totaling 49,692 shares generating gross proceeds of roughly $1.04 million across several sales.
Magnite director Paul Caine reported the sale of 5,000 shares of common stock on 08/11/2025. The sale was executed pursuant to a Rule 10b5-1 trading plan adopted on August 15, 2024, and the reported weighted average price was $22.29 (shares transacted at prices ranging from $22.07 to $22.67). After the reported transaction, the reporting person beneficially owned 178,603 shares directly.
The Form 4 shows the disposition was coded as a sale and filed by one reporting person who is identified as a director. The filer offered to provide transaction-level price details on request as noted in the explanatory footnote.
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