MGNI insider sale filed: 10,388 shares; prior sales total 115,125 for $2.42M

Rhea-AI Filing Summary

Magnite, Inc. insider sale notice: The filer reported a proposed sale of 10,388 common shares, with an aggregate market value of $246,195.60, with the shares listed on NASDAQ. The securities were acquired as restricted stock units and recorded as equity compensation on 08/15/2025. The filing lists the issuer's outstanding common shares at 142,399,305, making the proposed block roughly 0.0073% of outstanding stock. The notice also discloses prior sales by the same person totaling 115,125 shares in the past three months, generating aggregate gross proceeds of $2,422,785.15. The filer affirms no undisclosed material adverse information.

Positive

• Compliance disclosure: Form 144 filed to disclose proposed sale of 10,388 shares valued at $246,195.60
• Transparency on acquisition: Shares were acquired as restricted stock units and payment was equity compensation
• Detailed prior sales provided: Past three months sales listed totaling 115,125 shares and $2,422,785.15 in gross proceeds

Negative

• Insider sales activity: The filer sold 115,125 shares in the past three months (documented in the filing)
• Ongoing selling: Proposed additional sale follows multiple recent dispositions, which may be monitored by stakeholders

Insights

Securities Analyst

TL;DR: Routine insider sale disclosure; proposed sale is immaterial relative to outstanding shares but follows recent insider sales.

The Form 144 documents a proposed sale of 10,388 common shares (market value $246,195.60) acquired via restricted stock units on 08/15/2025. With 142,399,305 shares outstanding, the proposed sale represents approximately 0.0073% of the float, which is immaterial from a dilution perspective. However, the filer sold 115,125 shares across five transactions in the preceding three months, producing $2,422,785.15 in gross proceeds. For investors, this is a transparent compliance filing rather than an operational or financial disclosure.

Corporate Governance Expert

TL;DR: Disclosure meets Rule 144 requirements; repeated recent sales are notable for governance monitoring but not inherently material.

The form specifies the relationship between the seller and issuer and confirms the securities were granted as equity compensation and acquired on 08/15/2025. The filer attests to no undisclosed material adverse information. The sequence of prior sales (115,125 shares for $2,422,785.15) warrants standard oversight by governance or insider-trading compliance teams, but the transaction sizes are small relative to the company's 142 million outstanding shares, suggesting limited corporate control impact.

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	10388	246195.60	142399305	08/18/2025	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 Unit- See Remarks	Issuer			10388	08/15/2025	Equity Compensation

* 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 c/o Magnite, Inc. 1250 Broadway, 15th Floor New York NY 10001	Common	07/03/2025	42584	1064600.00
Adam Soroca c/o Magnite, Inc. 1250 Broadway, 15th Floor New York NY 10001	Common	06/24/2025	44519	890380.00
Adam Soroca c/o Magnite, Inc. 1250 Broadway, 15th Floor New York NY 10001	Common	06/06/2025	8328	147405.60
Adam Soroca c/o Magnite, Inc. 1250 Broadway, 15th Floor New York NY 10001	Common	05/20/2025	8328	141576.00
Adam Soroca c/o Magnite, Inc. 1250 Broadway, 15th Floor New York NY 10001	Common	05/16/2025	11366	178823.55

144: Remarks and Signature

Remarks

Date of Notice

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 is the proposed sale disclosed in the MGNI Form 144?

The proposed sale is 10,388 common shares with an aggregate market value of $246,195.60, to be sold on NASDAQ.

How were the 10,388 shares acquired according to the filing?

The shares were acquired as Restricted Stock Units (RSUs) on 08/15/2025 and recorded as equity compensation.

How many Magnite (MGNI) shares are outstanding per the filing?

The filing lists 142,399,305 shares outstanding.

What insider sales by the same person occurred in the past three months?

Five sales totaling 115,125 shares occurred on 05/16/2025, 05/20/2025, 06/06/2025, 06/24/2025, and 07/03/2025, generating gross proceeds of $2,422,785.15.

On which exchange will the proposed sale take place?

The filing indicates the shares will be sold on NASDAQ.