MGNI insider filing: 10,579 restricted shares planned sale on NASDAQ

Rhea-AI Filing Summary

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.

Positive

• Transparent disclosure of the proposed sale including broker, share count, value, acquisition date, and planned sale date
• Records recent sales by the same person in the past three months, providing clarity on insider liquidity activity

Negative

• Insider selling activity is evident: proposed sale of 10,579 shares and multiple prior disposals in recent months
• No additional issuer context (operational or financial) is provided in the filing, so market interpretation of the sales is limited

Insights

Securities Analyst

TL;DR: Routine insider notice for a modest proposed sale; prior recent disposals are documented but no new material disclosures.

The Form 144 reports a proposed sale of 10,579 restricted shares valued at $248,330.39, to be executed through Morgan Stanley on Nasdaq. The securities were acquired as restricted stock from the issuer on 08/15/2025. The filing provides transparency on insider liquidity and records several prior sales in the past three months with stated gross proceeds, allowing investors to quantify recent insider selling activity. There are no additional operational or financial disclosures in this notice.

Corporate Governance Expert

TL;DR: Compliance-driven disclosure of planned insider sale; procedurally standard with no governance red flags in the form itself.

The notice meets Rule 144 requirements by identifying the broker, class, quantity, acquisition date, and acquisition nature (restricted stock). It includes the seller's representation regarding material nonpublic information. While repeated sales are recorded, the filing contains no statements of misconduct, trading-plan dates, or extraordinary governance events. This is a routine compliance filing rather than a governance action.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	10579	248330.39	142399305	08/19/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/15/2025	Restricted Stock	ISSUER			10579	08/15/2025	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	08/18/2025	9700	231377.01
ADAM L SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	07/03/2025	34255	856375.00
ADAM L SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	07/03/2025	8329	208225.00
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	06/24/2025	14261	285220.00
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	06/24/2025	3662	73240.00
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	06/24/2025	18267	365340.00
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	06/24/2025	8329	166580.00
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	06/06/2025	8328	147405.60
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	05/20/2025	8328	141576.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Magnite's (MGNI) Form 144 disclose?

The Form 144 discloses a proposed sale of 10,579 restricted common shares valued at $248,330.39, to be sold via Morgan Stanley on 08/19/2025 on NASDAQ.

Who acquired the shares being sold according to the Form 144?

The shares were acquired as restricted stock from the issuer on 08/15/2025.

Has the filer sold other MGNI shares recently?

Yes. The filing lists multiple sales in the past three months, including transactions on 08/18/2025, 07/03/2025, 06/24/2025, 06/06/2025, and 05/20/2025 with reported gross proceeds for each.

Through which broker will the proposed sale be executed?

The proposed sale is to be executed through Morgan Stanley Smith Barney LLC.

Does the Form 144 state the filer knows of any material nonpublic information?

By signing, the filer represents they do not know any material adverse information about the issuer that has not been publicly disclosed.