Adam Soroca files to sell 18,225 shares

Adam L. Soroca filed a Form 144 notifying a proposed sale of 18,225 shares of Common Stock, described as restricted stock vesting under a registered plan on 01/09/2026.

Rhea-AI Filing Summary

Adam L. Soroca filed a Form 144 notifying a proposed sale of 18,225 shares of Common Stock, described as restricted stock vesting under a registered plan on 01/09/2026. The filing also lists a prior sale of 18,451 shares on 05/18/2026 and monetary figures of $250,477.11 and $247,975.90 in the excerpt.

Insights

Securities Counsel

Form 144: affiliate sale notice for restricted shares and a recent disposition.

Form 144 is a required notice when an affiliate proposes to sell securities; the excerpt lists 18,225 shares tied to a restricted stock vesting under a registered plan dated 01/09/2026. It also records a past reported sale of 18,451 shares on 05/18/2026.

Regulatory treatment depends on whether the sale complies with Rule 144 resale conditions and any holding-period or filing timing rules. Subsequent filings will record actual sale amounts and timing; this notice itself reports proposed activity.

Key Figures

Proposed shares to sell: 18,225 shares Shares sold in past 3 months: 18,451 shares Monetary figure 1: $250,477.11 +1 more

4 metrics

Proposed shares to sell 18,225 shares restricted stock vesting under a registered plan on 01/09/2026

Shares sold in past 3 months 18,451 shares sale dated 05/18/2026

Monetary figure 1 $250,477.11 listed near filer/securities lines in excerpt

Monetary figure 2 $247,975.90 listed near securities sold entry in excerpt

Key Terms

Form 144, restricted stock vesting, registered plan

3 terms

Form 144 regulatory

"144: Filer Information"

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.

restricted stock vesting financial

"Restricted stock vesting under a registered plan"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

registered plan regulatory

"Restricted stock vesting under a registered plan"

A registered plan is a savings or investment account that a government recognizes for special tax treatment and rules, such as limits on how much you can put in and conditions for withdrawals. For investors it matters because those rules change how much of your gains are taxed, how quickly your money can be accessed and what strategies make sense — like a labeled jar that gives tax breaks but comes with rules about when and how you can take the money out.

FAQ

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

What does Adam L. Soroca's Form 144 for MGNI report?

The Form 144 reports a proposed sale of 18,225 shares of Common Stock tied to restricted stock vesting on 01/09/2026. The excerpt also shows a prior sale of 18,451 shares on 05/18/2026 and two monetary figures listed.

Does the filing show prior sales by the reporting person for MGNI?

Yes; the excerpt lists a security sale on 05/18/2026 of 18,451 shares. That entry appears under “Securities Sold During The Past 3 Months” alongside the reporting person’s name and address.

What securities are described in the Form 144 excerpt for MGNI?

The filing describes Common Stock and specifically notes restricted stock vesting under a registered plan dated 01/09/2026. The broker/filer name shown is Morgan Stanley Smith Barney LLC Executive Financial Services.

What monetary figures appear in the excerpt and where?

The excerpt lists two monetary figures: $250,477.11 and $247,975.90, shown near the filer and securities lines. The excerpt does not attach labels beyond placement in the filing snippet.

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

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Accepted by SEC EDGAR 05/27/2026 - 04:24 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	0001725125
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	ADAM L SOROCA
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	Former 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	18225	250477.11	143215003	05/27/2026	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	01/09/2026	Restricted stock vesting under a registered plan	Issuer			18225	01/09/2026	Services Rendered

* 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, 9th Floor New York NY 10001	Common	05/18/2026	18451	247975.90

144: Remarks and Signature

Remarks
Date of Notice	05/27/2026
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/ Adam Lee Soroca
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)