[144] Magnite, Inc. SEC Filing

Rhea-AI Filing Summary

Form 144 filed for Magnite, Inc. (MGNI) discloses a proposed sale of 2,950 restricted common shares acquired from the issuer on 08/15/2024. The seller lists a broker as Morgan Stanley Smith Barney LLC and values the proposed sale at $74,841.50 with an approximate sale date of 09/03/2025 on NASDAQ. The filing also reports recent sales by the same person: 7,834 shares sold on 08/18/2025 for $186,866.75 and 9,289 shares sold on 06/30/2025 for $204,358.00. The filing shows 142,399,305 shares outstanding and includes the seller's declaration regarding absence of undisclosed material information.

Positive

• None.

Negative

• Proposed insider sale: 2,950 restricted common shares valued at $74,841.50 scheduled for sale 09/03/2025.
• Recent insider dispositions: 9,289 shares sold 06/30/2025 for $204,358.00 and 7,834 shares sold 08/18/2025 for $186,866.75.

Insights

Securities Analyst

TL;DR: Insider plans to sell 2,950 restricted shares and has completed two recent sales, disclosed under Rule 144.

The filing documents a Rule 144 notice for 2,950 restricted common shares acquired 08/15/2024 from the issuer and scheduled for sale on 09/03/2025 through Morgan Stanley Smith Barney LLC. The insider previously sold 9,289 and 7,834 shares in the past three months, generating $204,358.00 and $186,866.75 respectively. With 142,399,305 shares outstanding, the newly proposed sale represents a de minimis fraction of outstanding shares but is material to monitor for timing and cumulative insider disposition patterns.

Corporate Governance Expert

TL;DR: Disclosure complies with Rule 144 formalities; signer affirms no undisclosed material information.

The Form 144 provides the required broker, acquisition date, nature of acquisition (restricted stock), and recent sale history by the same person. It includes the standard attestation that the signer is unaware of any undisclosed material adverse information. The filing shows the acquisitions originated from the issuer on 08/15/2024 and payment was made the same day, consistent with restricted grant documentation. Documentation appears procedural and fulfills public disclosure obligations for an intended sale.

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	2950	74841.50	142399305	09/03/2025	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	08/15/2024	Restricted Stock	ISSUER			2950	08/15/2024	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
DAVID BUONASERA 1250 Broadway, 15th Floor New York NY 10001	Common	08/18/2025	7834	186866.75
DAVID BUONASERA 1250 Broadway, 15th Floor New York NY 10001	Common	06/30/2025	9289	204358.00

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 the Form 144 for MGNI disclose?

It discloses a proposed sale of 2,950 restricted common shares valued at $74,841.50, with an approximate sale date of 09/03/2025.

Who is the broker named on the MGNI Form 144?

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

What recent sales by the same person are disclosed in the filing?

The filing reports sales of 9,289 shares on 06/30/2025 for $204,358.00 and 7,834 shares on 08/18/2025 for $186,866.75.

When were the 2,950 shares acquired and how were they acquired?

They were acquired on 08/15/2024 as restricted stock from the issuer, with payment dated 08/15/2024.

How many MGNI shares are outstanding according to the filing?

The filing reports 142,399,305 shares outstanding.