MGNI Form 144 lists issuer restricted stock, two sales

Morgan Stanley Smith Barney LLC submitted a Form 144-style filing listing Common restricted stock dated 02/15/2025 identified as "Securities To Be Sold" by the ISSUER.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC submitted a Form 144-style filing listing Common restricted stock dated 02/15/2025 identified as "Securities To Be Sold" by the ISSUER. The excerpt also lists two recorded sales by David Buonasera: 1,057 shares on 06/15/2026 and 1,409 shares on 06/01/2026.

Insights

Securities Counsel

Filing lists issuer-designated restricted common stock and recent small sales by an individual.

The excerpt shows Common restricted stock dated 02/15/2025 labeled "ISSUER" and records two dispositions by David Buonasera on 06/01/2026 and 06/15/2026.

Timing, cash‑flow treatment, and whether these sales were pursuant to Rule 144 conditions are not shown in the excerpt; subsequent filings or broker confirmations would provide definitive transfer mechanics.

Key Figures

Restricted stock date: 02/15/2025 Sale by David Buonasera: 1,409 shares Sale by David Buonasera: 1,057 shares +1 more

4 metrics

Restricted stock date 02/15/2025 Securities To Be Sold entry labeled Restricted Stock

Sale by David Buonasera 1,409 shares Sale recorded on 06/01/2026

Sale by David Buonasera 1,057 shares Sale recorded on 06/15/2026

Broker/Dealer Morgan Stanley Smith Barney LLC Listed as filer/broker address line

Key Terms

Restricted Stock, ISSUER, Form 144

3 terms

Restricted Stock financial

"Securities To Be Sold | Common | 02/15/2025 | Restricted Stock"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

ISSUER regulatory

"Securities To Be Sold ... Restricted Stock | ISSUER"

Form 144 regulatory

"Form type appears in metadata as "144" indicating Rule 144 notice"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the MGNI Form 144 excerpt show about securities being sold?

It shows Common restricted stock dated 02/15/2025 listed as "Securities To Be Sold." The entry labels the seller role as ISSUER for that line and identifies sale activity elsewhere in the excerpt.

Who is the reported seller in the MGNI excerpt?

The excerpt names David Buonasera as the individual associated with recent transactions. It lists his addresses and two sales recorded on 06/01/2026 and 06/15/2026 with share counts shown.

How many shares did David Buonasera sell according to the excerpt?

The excerpt lists 1,409 shares sold on 06/01/2026 and 1,057 shares sold on 06/15/2026. These are the two discrete sale entries visible in the provided content.

Does the excerpt state proceeds or prices for the reported sales?

No explicit sale prices or clear proceeds allocations are stated for the transactions in the excerpt. The content shows numeric values but does not label them unambiguously as sale proceeds or prices.

Is the sale described as conducted under Rule 144 conditions in this excerpt?

The excerpt does not state whether the transactions met Rule 144 conditions. The filing type implies Rule 144 reporting, but the text does not include compliance details or qualifying statements.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/16/2026 - 04:22 PM EDT Learn about SEC filing dates

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	0001966857
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MAGNITE, INC.
SEC File Number	001-36384
Address of Issuer	1250 Broadway, 9th Floor New York, NEW YORK 10001
Phone	(212) 243-2769
Name of Person for Whose Account the Securities are To Be Sold	DAVID BUONASERA
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	Officer

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	11233	202194.00	143215003	06/16/2026	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	02/15/2025	Restricted Stock	ISSUER			11233	02/15/2025	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
DAVID BUONASERA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/15/2026	1057	17969.00
DAVID BUONASERA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/01/2026	1409	21135.00

144: Remarks and Signature

Remarks
Date of Notice	06/16/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/11/2025
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	/s/ David Matthew Buoanesera
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)