[Form 4] Magnite, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Aaron Saltz, Chief Legal Officer of Magnite, Inc. (MGNI), reported a sale of 12,403 shares of Magnite common stock on 08/29/2025 at a reported price of $26.07 per share, reducing his direct beneficial ownership to 229,781 shares. The filing is a Form 4 statement of changes in beneficial ownership and is signed by Mr. Saltz.

Positive

• Reporting compliance: The Form 4 is properly executed and signed, meeting Section 16 disclosure requirements.
• Substantial retained ownership: The reporting person still holds 229,781 shares directly after the sale.

Negative

• Insider sale: Disposition of 12,403 shares at $26.07 on 08/29/2025 reduces insider holdings.
• No disclosed trading plan: The filing does not indicate the transaction was made pursuant to a Rule 10b5-1 plan or provide rationale for the sale.

Insights

Securities Analyst

TL;DR: Insider sale of 12,403 shares by Chief Legal Officer; remaining direct holdings 229,781 shares—routine disclosure, not necessarily signal of material change.

The Form 4 documents a single non-derivative transaction: a sale (code S) of 12,403 shares executed on 08/29/2025 at $26.07 per share. The reporting person retains 229,781 shares directly after the transaction. As this is a routine Section 16 filing, it reports actual ownership change rather than offering explanatory context such as reason for sale or planned disposition. Based solely on the filing, this is a straightforward compliance disclosure without additional material corporate information.

Corporate Governance Expert

TL;DR: This Form 4 is a standard insider sale report by an officer; it documents compliance but does not indicate corporate governance issues.

The document identifies Aaron Saltz as Officer (Chief Legal Officer) and reports the disposition of 12,403 shares at $26.07 on 08/29/2025, with post-transaction direct ownership of 229,781 shares. The filing is signed and contains no amendments or derivative transactions. There is no information in the filing about any trading plan or exemption under Rule 10b5-1, so no additional governance or intent information is disclosed here.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Saltz Aaron

(Last) (First) (Middle)

C/O MAGNITE, INC.

1250 BROADWAY, 15TH FLOOR

(Street)

NEW YORK NY 10001

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MAGNITE, INC. [ MGNI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF LEGAL OFFICER

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/29/2025		S		12,403	D	$26.07	229,781	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Aaron Saltz	08/29/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Aaron Saltz report on the Form 4 for MGNI?

He reported a sale of 12,403 shares of Magnite common stock on 08/29/2025 at $26.07 per share, leaving 229,781 shares beneficially owned directly.

What role does the reporting person hold at Magnite (MGNI)?

Aaron Saltz is reported as an Officer, holding the title Chief Legal Officer.

Does the Form 4 show any derivative transactions or amendments?

No. The filing reports a single non-derivative sale and contains no derivative securities, amendments, or exercised options.

Was the sale indicated as part of a 10b5-1 trading plan in this Form 4?

No. The filing does not check or state that the transaction was made pursuant to a Rule 10b5-1 trading plan.

When was the transaction executed according to the Form 4?

The transaction date reported is 08/29/2025.