Magnite (MGNI) legal chief forfeits shares to cover taxes

Rhea-AI Filing Summary

MAGNITE, INC. (MGNI) reported that Chief Legal Officer Aaron Salt had 5,627 shares of common stock withheld on 2026-08-15 at $24.73 per share. The shares were non-discretionarily forfeited to cover tax withholding obligations arising from the vesting of restricted stock units, pursuant to an arrangement mandated by the company. After this tax-withholding disposition, Salt directly holds 264,389 shares of MAGNITE common stock.

Insider Trade Summary

Net Seller: 5,627 shares

Net Sell 1 txn

Insider Saltz Aaron

Role CHIEF LEGAL OFFICER

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	5,627	$24.73	$139K

Holdings After Transaction: Common Stock — 264,389 shares (Direct)

Footnotes (1)

1. F1. Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units.

Key Figures

Shares forfeited for tax withholding: 5,627 shares Transaction price per share: $24.73 per share Shares held after transaction: 264,389 shares

3 metrics

Shares forfeited for tax withholding 5,627 shares Non-discretionary forfeiture on 2026-08-15 for RSU-related tax withholding

Transaction price per share $24.73 per share Value used for the 5,627-share tax-withholding disposition

Shares held after transaction 264,389 shares Direct MAGNITE common stock holdings of Aaron Salt following the Form 4 transaction

Key Terms

restricted stock units, tax withholding obligations, non-discretionary forfeiture

3 terms

restricted stock units financial

"associated with the vesting of restricted stock units"

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.

tax withholding obligations financial

"to cover the tax withholding obligations associated with the vesting"

non-discretionary forfeiture financial

"Represents the non-discretionary forfeiture of shares on behalf of"

FAQ

What insider transaction did MAGNITE (MGNI) report for Aaron Salt?

MAGNITE reported that Chief Legal Officer Aaron Salt had 5,627 shares of common stock forfeited to cover tax withholding obligations from vesting restricted stock units, leaving him with 264,389 shares directly held.

Was the MAGNITE (MGNI) insider transaction a discretionary sale by Aaron Salt?

No. The 5,627-share disposition was a non-discretionary forfeiture mandated by MAGNITE to satisfy tax withholding obligations tied to the vesting of restricted stock units, rather than an open-market sale initiated by Salt.

At what price were the MAGNITE (MGNI) shares withheld for Aaron Salt’s taxes?

The 5,627 MAGNITE shares withheld for Aaron Salt’s tax obligations were valued at $24.73 per share, consistent with a Form 4 transaction coded as payment of tax liability by delivering or withholding securities.

How many MAGNITE (MGNI) shares does Aaron Salt hold after the reported transaction?

Following the tax-withholding forfeiture of 5,627 shares, Chief Legal Officer Aaron Salt directly owns 264,389 shares of MAGNITE common stock, as reported in the Form 4 insider filing for the August 15, 2026 transaction.

What does the transaction code F mean in the MAGNITE (MGNI) Form 4?

Transaction code F indicates shares were used for payment of exercise price or tax liability. Here, MAGNITE states the 5,627-share forfeiture covered tax withholding obligations from the vesting of restricted stock units for Aaron Salt.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/18/2026 - 04:21 PM Accepted by SEC EDGAR 08/18/2026 - 04:21 PM Learn about SEC filing dates

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, 9TH FLOOR

(Street)

NEW YORK NEW YORK 10001

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2026

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

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

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

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	08/15/2026		F(1)		5,627	D	$24.73	264,389	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:

1. Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units.

Remarks:

	/s/ Aaron Saltz, attorney-in-fact	08/18/2026
	** 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.
* Form 4: SEC 1474 (03-26)