Magnite (MGNI) Insider Files Rule 144 to Sell 8,345 Shares on NASDAQ

Rhea-AI Filing Summary

Form 144 notice for Magnite, Inc. (MGNI): This filing reports a proposed sale of 8,345 common shares valued at $216,970.00, to be sold on 08/25/2025 on NASDAQ through Morgan Stanley Smith Barney LLC. The shares were acquired as restricted stock from the issuer on 04/01/2021. The filer previously sold common shares this year: 10,487 shares on 08/18/2025 for $250,149.56, 24,495 shares on 06/30/2025 for $571,164.00, 20,000 shares on 06/16/2025 for $370,000.00, and 35,000 shares on 06/05/2025 for $607,695.50. The filer certifies no undisclosed material adverse information.

Positive

• Compliant disclosure of proposed sale under Rule 144 with broker and trade date specified
• Acquisition origin provided: shares were restricted stock issued by the company on 04/01/2021
• Prior sales listed with gross proceeds, offering transparency on recent insider dispositions

Negative

• Insider liquidity events: multiple sizable share sales in 2025 (totaling 89,982 shares) which may be interpreted by some investors as increased insider selling

Insights

Securities Analyst

TL;DR: Executive insider sales continue with scheduled sale of 8,345 restricted shares; multiple recent disposals occurred in 2025.

The Form 144 discloses a planned sale of 8,345 common shares of MGNI by an insider, executed through a major brokerage on NASDAQ. The securities were originally issued as restricted stock on 04/01/2021. The filing also summarizes four recent sales in 2025 totaling 89,982 shares and gross proceeds of $1,799,009.06. For investors, these disclosures document insider liquidity events and the mechanism (Rule 144) being used to effect compliant public sales.

Corporate Governance Expert

TL;DR: Routine Rule 144 disclosure of insider sales; filings include prior transactions and a representation about material non-public information.

The notice follows required Rule 144 procedures by stating acquisition details (restricted stock from issuer) and planned broker-assisted sale. The filing includes the mandatory attestation that the seller is not aware of undisclosed material adverse information. No information here indicates corporate governance changes or regulatory concerns; it is a standard insider sale disclosure.

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	8345	216970.00	142399305	08/25/2025	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	04/01/2021	Restricted Stock	ISSUER			8345	04/01/2021	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
KATHERYN EVANS 1250 Broadway, 15th Floor New York NY 10001	Common	08/18/2025	10487	250149.56
KATHERYN EVANS 1250 Broadway, 15th Floor New York NY 10001	Common	06/30/2025	24495	571164.00
KATHERYN EVANS 1250 Broadway, 15th Floor New York NY 10001	Common	06/16/2025	20000	370000.00
KATHERYN EVANS 1250 Broadway, 15th Floor New York NY 10001	Common	06/05/2025	35000	607695.50

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 filed for Magnite (MGNI) report?

The filing reports a proposed sale of 8,345 common shares of MGNI valued at $216,970.00, to be sold on 08/25/2025 on NASDAQ via Morgan Stanley Smith Barney LLC.

Who is the seller named in the Form 144 for MGNI?

The recent executed sales listed in the filing are by Katheryn Evans (address shown). The filer representing the proposed sale signs the Form 144.

When and how were the securities to be sold acquired?

The 8,345 shares were acquired as restricted stock from the issuer on 04/01/2021, with payment and issuance dated the same day.

What recent insider sales does the filing disclose?

The filing lists four prior common stock sales in 2025: 08/18/2025 (10,487 sh, $250,149.56), 06/30/2025 (24,495 sh, $571,164.00), 06/16/2025 (20,000 sh, $370,000.00), and 06/05/2025 (35,000 sh, $607,695.50).

Does the filing indicate any undisclosed material information about Magnite?

The filer attests by signature that they do not know of any material adverse information about the issuer that has not been publicly disclosed.