Paul J Caine plans sale of 2,500 MGNI shares

Paul J Caine has filed to sell up to 2,500 shares of MGNI common stock through Morgan Stanley Smith Barney LLC, with an indicated value of $61,450.00.

Rhea-AI Filing Summary

Paul J Caine has filed to sell up to 2,500 shares of MGNI common stock through Morgan Stanley Smith Barney LLC, with an indicated value of $61,450.00. These shares relate to Restricted Stock Units granted on 06/01/2016. The filing also lists prior Rule 10b5-1 sales of 5,000 shares for $121,740.00 on 08/10/2026 and 5,000 shares for $103,185.00 on 07/10/2026.

Key Figures

Planned shares to be sold: 2,500 shares Planned sale value: $61,450.00 10b5-1 sale 08/10/2026: 5,000 shares for $121,740.00 +2 more

5 metrics

Planned shares to be sold 2,500 shares Common stock to be sold through Morgan Stanley Smith Barney LLC

Planned sale value $61,450.00 Aggregate value for 2,500 MGNI common shares

10b5-1 sale 08/10/2026 5,000 shares for $121,740.00 Common stock sold under Rule 10b5-1 plan

10b5-1 sale 07/10/2026 5,000 shares for $103,185.00 Common stock sold under Rule 10b5-1 plan

RSU grant date 06/01/2016 Restricted Stock Units from which 2,500 shares derive

Key Terms

Restricted Stock Units, Rule 10b5-1, Executive Financial Services

3 terms

Restricted Stock Units financial

"Common | 06/01/2016 | Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Rule 10b5-1 regulatory

"10b5-1 Sales for PAUL J CAINE 1250 Broadway"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

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

What does the Form 144 filing for MGNI by Paul J Caine disclose?

The filing shows Paul J Caine plans to sell up to 2,500 MGNI common shares valued at $61,450.00. It also reports prior Rule 10b5-1 sales totaling 10,000 shares over the past three months.

How many MGNI shares is Paul J Caine currently registering to sell?

Paul J Caine is registering to sell up to 2,500 shares of MGNI common stock. The indicated aggregate value for this planned sale is $61,450.00, to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services.

What recent MGNI share sales has Paul J Caine reported under Rule 10b5-1?

The filing lists two Rule 10b5-1 sales: 5,000 shares for $121,740.00 on 08/10/2026 and 5,000 shares for $103,185.00 on 07/10/2026. These transactions together account for 10,000 shares sold in the past three months.

What is the origin of the MGNI shares Paul J Caine plans to sell?

The 2,500 MGNI shares planned for sale are tied to Restricted Stock Units dated 06/01/2016. The filing identifies the securities as common stock issued by the issuer in connection with that RSU award.

Which broker is handling Paul J Caine’s planned MGNI share sale?

The planned sale of 2,500 MGNI common shares will be handled through Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza, 8th Floor, New York, NY 10004, according to the filing disclosure.

What is the estimated value of recent MGNI stock sales by Paul J Caine?

Recent Rule 10b5-1 sales total $224,925.00 for 10,000 shares, plus the planned sale valued at $61,450.00. Altogether, the filing references MGNI share transactions and plans exceeding $286,000.00 in value.

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

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Accepted by SEC EDGAR 08/14/2026 - 04:45 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	0001411765
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	2122432769
Name of Person for Whose Account the Securities are To Be Sold	PAUL CAINE
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	Director

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	2500	61450.00	143424157	08/14/2026	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	06/01/2016	Restricted Stock Units	Issuer			2500	06/01/2016	N/A

* 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
10b5-1 Sales for PAUL J CAINE 1250 Broadway, 9th Floor New York NY 10001	Common	08/10/2026	5000	121740.00
10b5-1 Sales for PAUL J CAINE 1250 Broadway, 9th Floor New York NY 10001	Common	07/10/2026	5000	103185.00

144: Remarks and Signature

Remarks
Date of Notice	08/14/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/20/2025
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/ Paul Caine
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)