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.
Magnite (NASDAQ: MGNI) filed a Form 4 detailing transactions by Chief Product Officer Adam Soroca on 24 Jun 2025.
Soroca exercised 8,329 options at $1.97 and sold 44,519 common shares at $20.00, generating roughly $0.89 million and reducing his direct stake by about 10% to 400,927 shares.
The trades were executed under a Rule 10b5-1 plan adopted 7 Mar 2025. The options were fully vested and remain exercisable until 15 Mar 2028.
Magnite (NASDAQ:MGNI) filed a Form 4 reporting that director Paul Caine sold 5,000 common shares on 06/24/2025 at $20.00 per share, generating proceeds of roughly $100,000. The transaction was executed under a previously adopted Rule 10b5-1 trading plan dated 08/15/2024. After the sale, Caine’s direct beneficial ownership stands at 188,603 shares. No other securities or derivative positions were disclosed.
Magnite (NASDAQ: MGNI) filed a Form 4 showing CEO Michael G. Barrett sold 300,000 shares of common stock on 06/24/2025 at a weighted-average price of $20.01, realizing roughly $6.0 million.
The sale was executed under a Rule 10b5-1 plan adopted 03/12/2025. Barrett’s direct holdings fell from 656,708 to 356,708 shares, a reduction of about 46%.
No derivative trades were reported. While pre-scheduled, the magnitude of the disposition is material and could affect perceptions of insider confidence.
Magnite (NASDAQ:MGNI) filed a Form 4 disclosing that CFO David Day exercised 71,000 stock options at $5.28 and immediately sold the same number of common shares.
The trades, executed on 24 & 26 June 2025 under a pre-arranged Rule 10b5-1 plan, generated gross proceeds of roughly $1.45 million (35k @ $19.95, 36k @ $20.95). Following these transactions, Day’s direct ownership fell to 443,528 shares, a reduction of about 14% of his prior holdings.
The options stem from an April 2021 grant that vests monthly through April 2030. No additional derivatives were sold, and Day retains 44,784 unexercised options from the award. The sizeable sale may influence investor sentiment given the executive’s senior role.
Magnite, Inc. (MGNI) — Form 144 filing dated 06/26/2025
Officer David Day has filed a Form 144 indicating his intention to sell up to 36,000 common shares through Morgan Stanley Smith Barney on or about 06/26/2025. At the recent market price used in the filing, the shares are valued at $754,200. The company has 141,110,559 shares outstanding, so the proposed sale represents roughly 0.026 % of shares outstanding and poses no dilution risk to current shareholders.
Day adopted a Rule 10b5-1 trading plan on 03/13/2025, which pre-authorises trades and reduces the likelihood of trades being based on undisclosed information.
Form 144 also discloses that during the past three months Day sold:
- 38,146 shares on 06/18/2025 for $722,866.70
- 35,000 shares on 06/24/2025 for $698,250.00
Together with the new notice, the officer has sold or plans to sell 109,146 shares worth approximately $2.18 million, equal to about 0.077 % of shares outstanding.
Key Take-aways for investors
- The filing signals continued insider selling but under a 10b5-1 plan, indicating procedural compliance.
- The size of the sale is immaterial to the company’s capital structure but may be monitored as a sentiment indicator.
Magnite, Inc. (MGNI) – Form 144 filing dated June 24, 2025 discloses a planned insider sale under Rule 144 of the Securities Act.
- Seller & quantity: Michael Barrett intends to sell 300,000 common shares.
- Estimated proceeds: Aggregate market value stated at $6.0 million, implying a reference price of roughly $20 per share.
- Broker: Raymond James & Associates, 880 Carillon Parkway, St. Petersburg, FL 33716.
- Timing: Shares are expected to be sold on or about 06/24/2025 on the NASDAQ.
- Issuer share base: 135,574,532 shares outstanding; proposed sale equals about 0.22 % of total shares.
- Prior insider activity: The same seller disposed of 75,000 shares during 06/16–06/18/2025 for gross proceeds of $1.369 million.
- Acquisition history: All shares stem from restricted-stock grants received between 05/15/2019 and 02/01/2025.
The filing contains no additional remarks, relationships, or adverse information statements beyond the standard Rule 144 affirmations. Investors often monitor Form 144 notices as sentiment indicators; however, the transaction represents a small fraction of shares outstanding and does not create dilution.