Magnite (MGNI) Rule 144 Notice — 12,403 Shares Listed for Sale

Rhea-AI Filing Summary

Magnite, Inc. (MGNI) Form 144 summary: This notice reports a proposed sale under Rule 144 of 12,403 common shares through Morgan Stanley Smith Barney, with an aggregate market value of $323,399.54. The shares were originally acquired as restricted stock on 02/14/2021 from the issuer and were fully paid on that date. The filer (identified in prior transactions as Aaron Saltz) has disclosed multiple recent open-market sales during June–August 2025 totaling 69,325 shares with gross proceeds shown for each trade. The filing includes the standard representation that the seller is not aware of undisclosed material adverse information about the issuer.

Positive

• Complies with Rule 144 disclosure requirements by providing acquisition details, broker, and recent sales
• Multiple prior sales disclosed, improving transparency about insider transactions

Negative

• Insider selling activity continues (69,325 shares sold in June–August 2025), which could be viewed negatively by some investors
• Form shows ongoing monetization of restricted shares by an insider, potentially increasing share supply

Insights

Securities Analyst

TL;DR: Routine insider resale of restricted shares under Rule 144; disclosed recent sales show ongoing liquidation activity but small relative to shares outstanding.

The filing documents a compliant Rule 144 notice for 12,403 shares valued at $323,399.54, acquired as restricted stock in 2021. Recent disclosed sales (totaling 69,325 shares across June–August 2025) indicate the insider has been regularly monetizing holdings. With 142,399,305 shares outstanding, the single proposed sale is de minimis relative to the float. The filing does not disclose any material nonpublic information and includes the required seller attestation.

Corporate Governance Expert

TL;DR: Filing is procedural and compliant; disclosure of past sales enhances transparency but does not signal governance issues on its face.

The notice follows Rule 144 format, identifying acquisition type, payment date, and broker. Multiple past sales by the same person are listed with dates and proceeds, which provides visibility into insider transactions. There are no statements in the form indicating undisclosed adverse information. From a governance perspective, the document meets disclosure norms for officer/director sales.

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	12403	323399.54	142399305	08/29/2025	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	02/14/2021	Restricted Stock	Issuer			12403	02/14/2021	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
AARON SALTZ 1250 Broadway, 15th Floor New York NY 10001	Common	08/18/2025	5770	137633.54
AARON SALTZ 1250 Broadway, 15th Floor New York NY 10001	Common	08/14/2025	13860	323518.46
AARON SALTZ 1250 Broadway, 15th Floor New York NY 10001	Common	06/30/2025	17574	386628.00
AARON SALTZ 1250 Broadway, 15th Floor New York NY 10001	Common	06/16/2025	16788	293790.00
AARON SALTZ 1250 Broadway, 15th Floor New York NY 10001	Common	06/04/2025	15330	256127.38

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 does the Form 144 filing for MGNI disclose?

The filing discloses a proposed sale of 12,403 common shares valued at $323,399.54, acquired as restricted stock on 02/14/2021, to be executed through Morgan Stanley Smith Barney.

Who appears to be selling MGNI shares in this filing?

The filing references prior sales by Aaron Saltz with an address listed; the current Form 144 identifies the person for whose account the securities will be sold but does not include additional biographical details.

How many MGNI shares were sold recently by the same person?

The document lists five sales during June–August 2025 totaling 69,325 shares with reported gross proceeds for each trade.

What broker will execute the proposed MGNI sale?

The proposed sale is to be executed through Morgan Stanley Smith Barney LLC, 1 New York Plaza, 8th Floor, New York, NY.

Does the Form 144 state any undisclosed material information about MGNI?

The signer represents that they do not know of any material adverse information about the issuer that has not been publicly disclosed.