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. (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.
Magnite, Inc. (MGNI) filed a Form 144 reporting a proposed sale of 15,000 common shares through Morgan Stanley Smith Barney LLC with an aggregate market value of $333,685.50. The notice specifies an approximate sale date of 08/12/2025 and lists 142,399,305 shares outstanding, showing the proposed sale is a small fraction of the company's total shares.
The filing also discloses that the shares were acquired from the issuer as restricted stock on 06/28/2021. No securities were reported sold by the filer in the past three months. The notice includes the standard representation that the seller does not possess undisclosed material adverse information and references the Rule 144 sale process.
Magnite, Inc. (NASDAQ: MGNI) has filed a Form 144 indicating that Chief Executive Officer Michael Barrett intends to sell up to 70,900 common shares around 15 July 2025. The proposed sale, to be executed through Raymond James & Associates, is valued at approximately $1.65 million based on the filing’s reference price, and represents roughly 0.05 % of the company’s 135.6 million shares outstanding.
The notice also discloses that Barrett acquired the shares earlier in 2025 as restricted stock grants (31,377 shares on 5 Feb; 25,405 on 15 Feb; 14,118 on 15 May). In addition, the CEO sold a total of 375,000 shares during June 2025 for gross proceeds of $7.37 million, underscoring a pattern of recent insider selling.
While the absolute number of shares is small relative to the public float, the consecutive transactions may influence investor sentiment, especially given the seller’s senior role. The filing contains no indication that the sale is linked to a 10b5-1 trading plan, although it references Rule 10b5-1 compliance language. Investors typically monitor such activity for potential signals about management’s outlook, liquidity needs, or portfolio diversification.
Key figures:
- Shares to be sold: 70,900
- Aggregate market value: $1,650,160
- Broker: Raymond James & Associates
- Approximate sale date: 15 July 2025
- Shares sold in prior 3 months: 375,000 (gross proceeds $7.37 M)
Given the limited size versus total outstanding shares, the transaction is unlikely to have a material impact on Magnite’s capitalization but may attract short-term scrutiny regarding insider confidence.