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 (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.
Form 144 Notice Filing for Magnite indicates a proposed sale of 5,000 shares of common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of $94,450. The securities were originally acquired as Restricted Stock Units from the issuer on June 20, 2015, with an initial acquisition of 13,261 units.
Key details of the proposed transaction:
- Trading Venue: NASDAQ
- Planned Sale Date: June 24, 2025
- Current Shares Outstanding: 141,110,559
- Sale Price: Approximately $18.89 per share
The filing indicates no other sales by the same person in the past 3 months. The seller has certified no knowledge of undisclosed material adverse information regarding Magnite's operations. This Form 144 represents a standard notice of proposed sale by an insider under SEC Rule 144.
Magnite, Inc. (MGNI) – Form 144 filing overview
The notice discloses a proposed insider sale of 35,000 common shares through Morgan Stanley Smith Barney LLC, valued at $698,250. The approximate sale date is 24 June 2025, and the shares will be sold on the NASDAQ. The filing also indicates that 38,146 shares were already sold on 18 June 2025 for gross proceeds of $722,866.70, bringing the total disposition within three months to 73,146 shares.
Key contextual data supplied in the form:
- Issuer float: 141,110,559 shares outstanding, so the new proposed sale represents roughly 0.025% of shares outstanding.
- Seller: David Day (relationship to issuer not specified).
- Acquisition method: All 35,000 shares stem from a stock-option exercise completed on the same day as the planned sale; consideration was paid in cash.
- Regulatory attestation: The seller certifies no undisclosed material adverse information and acknowledges potential criminal liability for misstatements.
While insider sales can signal personal liquidity needs or portfolio diversification, the magnitude here is small relative to the total float and no other material corporate developments are disclosed.
Magnite, Inc. (MGNI) has filed a Form 144 indicating that Chief Product Officer Adam Soroca plans to sell up to 44,519 shares of the company’s common stock. The proposed sale, to be executed through Morgan Stanley Smith Barney LLC on or about 06/24/2025, carries an aggregate market value of approximately $890,380 based on the filing’s reference price and represents roughly 0.03% of the 141,110,559 shares outstanding.
The filing discloses the provenance of the shares: 14,261 restricted shares granted on 05/15/2021, 3,662 restricted shares granted on 08/15/2021, 18,267 restricted shares granted on 11/15/2021, and 8,329 shares to be issued from a same-day option exercise on 06/24/2025. No shares were received as gifts, and all purchases were made for cash or as equity compensation.
Form 144 also lists Soroca’s recent activity: in the prior three months he sold an additional 28,022 shares for gross proceeds of about $467,805. Combined with the proposed sale, Soroca could dispose of 72,541 shares within a short window, though the total still equates to a small fraction of the company’s float. The signer affirms that he possesses no undisclosed material adverse information and, if relying on Rule 10b5-1, has an approved trading plan in place.
Magnite, Inc. (MGNI) – Form 4 insider transaction
On 18 June 2025, company director James Rossman executed an open-market sale of 137,007 common shares under a Rule 10b5-1 trading plan adopted on 10 March 2025. The weighted-average sale price reported was $18.78 per share, with individual trades ranging from $18.78 to $18.82. Gross proceeds are therefore approximately $2.6 million (calculated from the weighted price disclosed).
After the transaction Rossman retains 93,679 shares held directly. Based on the reported numbers, the sale reduced his direct ownership by roughly 59 percent. No derivative securities were exercised or reported, and no additional purchases or sales were disclosed.
The filing is routine in that it documents a pre-planned disposition, yet the size of the sale may draw investor attention because it involves a majority of the insider’s previously held shares. Because the transaction was executed pursuant to a 10b5-1 plan, signaling risk is mitigated but not eliminated.
Magnite, Inc. (MGNI) – Form 4 insider activity
Chief Financial Officer David Day reported a same-day option exercise and share sale executed on 18 June 2025 under a pre-arranged Rule 10b5-1 trading plan adopted 13 March 2025.
- Option exercise: 38,146 employee stock options exercised at an exercise price of $4.92 (grant dated 20 Feb 2019, fully vested).
- Share sale: The exact 38,146 shares were disposed of on the open market at an average price of $18.95.
- Gross transaction value: Approximately $723k in proceeds (38,146 × $18.95) versus a cash outlay of roughly $188k for the exercise, implying a pre-tax gain of about $535k.
- Post-transaction ownership: Day retains 443,528 Magnite common shares held directly, indicating continued exposure to the company’s equity despite the sale.
There were no derivative holdings remaining from the exercised option grant, and no new option awards were reported. Because the activity was executed under an established 10b5-1 plan and represents less than 8% of Day’s reported ownership, the filing appears routine. Investors should nonetheless note the CFO’s decision to monetize a portion of his stake at a price materially above the option strike, potentially signalling confidence in capturing value or addressing personal liquidity needs rather than a fundamental view of Magnite’s prospects.