[144] Magnite, Inc. SEC Filing

Rhea-AI Filing Summary

Insider sale notice: This Form 144 by an issuer of record for Magnite, Inc. (MGNI) reports a proposed sale of 24,986 common shares through Morgan Stanley Smith Barney LLC on 09/02/2025 with an aggregate market value of $616,884.51. The filer reports those shares were acquired the same day, 09/02/2025, via stock option exercise and paid for in cash. The filing also discloses recent open-market dispositions by Adam L. Soroca totaling 116,710 shares sold across five transactions between 06/06/2025 and 08/19/2025, generating gross proceeds shown per trade. The notice includes the required attestation that the seller is not aware of undisclosed material adverse information.

Positive

• Transaction transparency: Filing provides clear details on the planned sale, broker, and acquisition method.
• Compliance attestation: Seller certifies no undisclosed material adverse information as required.

Negative

• None.

Insights

Securities Analyst

TL;DR Insider exercised options and intends to sell 24,986 shares; multiple prior dispositions occurred in recent months.

The filing documents a contemporaneous option exercise and a planned sale of those exercised shares through Morgan Stanley on 09/02/2025 with an indicated market value of $616,884.51. Historical sales by Adam L. Soroca are itemized, totaling 116,710 shares sold across five trades between 06/06/2025 and 08/19/2025 with reported gross proceeds per trade. From a securities-transaction perspective, this is a routine Rule 144 notice enabling resale of restricted or control stock; all material facts presented are transactional and non-forecasting.

Corporate Governance Expert

TL;DR Filing is a standard compliance disclosure showing option exercise and subsequent planned resale under Rule 144.

The document contains the required seller representations and broker information (Morgan Stanley Smith Barney LLC). It states the acquisition source as the issuer via stock option exercise and records cash payment. The seller attests to the absence of undisclosed material adverse information, satisfying Form 144 signature requirements. No governance or regulatory violations are disclosed in the filing text itself.

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	24986	616884.51	142399305	09/02/2025	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	09/02/2025	Stock Option Exercise	Issuer			24986	09/02/2025	Cash

* 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 L SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	08/19/2025	10579	248330.39
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	42584	1064600.00
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	06/24/2025	44519	890380.00
ADAM SOROCA 1250 Broadway, 15th Floor New York NY 10001	Common	06/06/2025	8328	147405.60

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 the Form 144 for MGNI report?

The form reports a proposed sale of 24,986 common shares via Morgan Stanley on 09/02/2025 valued at $616,884.51.

How were the 24,986 shares acquired according to the filing?

The filing states the shares were acquired on 09/02/2025 by stock option exercise and paid for in cash.

Who has recently sold shares according to the document?

The filing lists sales by Adam L. Soroca totaling 116,710 shares across transactions on 06/06/2025, 06/24/2025, 07/03/2025, 08/18/2025, and 08/19/2025 with gross proceeds shown per trade.

Which broker is handling the proposed sale?

The broker listed is Morgan Stanley Smith Barney LLC, Executive Financial Services, 1 New York Plaza, 8th Floor, New York, NY 10004.

Does the filing disclose any material nonpublic information?

No. The seller signs the form representing they do not know any material adverse information that has not been publicly disclosed.