MGNI files Form 144 to sell 6,000 vested shares

MGNI filed a Form 144 notice proposing the resale of 6,000 shares of Common Stock, consisting of restricted stock that vested on 05/25/2026.

Rhea-AI Filing Summary

MGNI filed a Form 144 notice proposing the resale of 6,000 shares of Common Stock, consisting of restricted stock that vested on 05/25/2026. The filing lists multiple recent open-market sales by Adam L. Soroca in June–May 2026, with individual trade sizes and proceeds shown.

Insights

Capital Markets Counsel

Form 144 lists a proposed resale of 6,000 vested restricted shares and multiple recent sales by an affiliated holder.

The notice records 6,000 shares of Common Stock tied to "Restricted Stock Vesting Under a Registered Plan" with a vesting date of 05/25/2026. The filing is a regulatory disclosure of intent to sell, not evidence of completed transactions for the 6,000 shares.

Cash‑flow treatment and planned distribution methods are not specified in the excerpt; subsequent public reports or trade filings will show actual execution details.

Key Figures

Registered/offering amount: 6,000 shares Vesting components: 2,588; 2,500; 912 shares Sale example — 05/28/2026: 42,756 shares +2 more

5 metrics

Registered/offering amount 6,000 shares Securities to be sold under registered plan, vesting date <date>05/25/2026</date>

Vesting components 2,588; 2,500; 912 shares Individual restricted stock vesting entries dated <date>05/25/2026</date>

Sale example — 05/28/2026 42,756 shares Sale by Adam L. Soroca on <date>05/28/2026</date> with proceeds listed

Sale example — 06/01/2026 27,606 shares Sale by Adam L. Soroca on <date>06/01/2026</date> with proceeds listed

Sale example — 06/11/2026 6,500 shares Sale by Adam L. Soroca on <date>06/11/2026</date> with aggregate proceeds shown

Key Terms

Restricted Stock Vesting Under a Registered Plan, Form 144, Services Rendered

3 terms

Restricted Stock Vesting Under a Registered Plan regulatory

"Restricted Stock Vesting Under a Registered Plan | Issuer | 05/25/2026"

Form 144 regulatory

"144: Securities To Be Sold"

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.

Services Rendered financial

"Services Rendered Common | 05/25/2026"

FAQ

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

What does MGNI's Form 144 disclose?

It discloses a proposed resale of 6,000 shares of Common Stock that vested on 05/25/2026. The notice lists the securities as "Restricted Stock Vesting Under a Registered Plan" and includes recent selling activity by an affiliated holder.

Who appears as the recent seller in the Form 144 excerpt for MGNI?

The excerpt lists Adam L. Soroca as the recent seller, with multiple transactions dated between 05/18/2026 and 06/11/2026. Each sale row shows the share count and aggregate proceeds for that trade.

How many shares vested and are listed to be sold under the registered plan?

The filing shows vested restricted stock totaling 6,000 shares (lines of 2,588; 2,500; 912) with a vesting date of 05/25/2026. The notice identifies these shares as issuable for services rendered.

Do the Form 144 entries mean the 6,000 shares have already been sold?

No. The Form 144 is a notice of proposed resale for 6,000 shares; it does not itself confirm execution. The excerpt separately lists prior completed sales by a holder in May–June 2026.

What recent sale sizes by Adam L. Soroca are shown in the excerpt?

Examples shown include sales of 42,756 shares on 05/28/2026 and 27,606 shares on 06/01/2026, with aggregate proceeds reported per trade in the filing rows.

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

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Accepted by SEC EDGAR 06/15/2026 - 04:05 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	6000	102000.00	143215003	06/15/2026	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	05/25/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			2588	05/25/2026	Services Rendered
Common	05/25/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			2500	05/25/2026	Services Rendered
Common	05/25/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			912	05/25/2026	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	06/11/2026	6500	104195.00
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/09/2026	6900	105225.00
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/03/2026	7100	100975.49
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/01/2026	27606	418014.69
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	05/28/2026	42756	603084.95
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	05/27/2026	18225	250477.11
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	06/15/2026
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, Trustee
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)