Magnite legal chief sells 40,000 shares at $23.41

Magnite’s chief legal officer sold 40,000 shares under a Rule 10b5-1 plan and continues to hold 224,389 shares directly.

Available on EDGAR 09/11/2026 - 04:16 PM EDT Accepted by SEC EDGAR 09/11/2026 - 04:15 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

MAGNITE, INC. (MGNI) reported that Chief Legal Officer Aaron Salt sold 40,000 shares of common stock on September 10, 2026 in an open-market transaction at a weighted average price of $23.41 per share. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted on June 11, 2026, and Salt now directly holds 224,389 shares of Magnite common stock.

Insider Trade Summary 10b5-1

Net Seller: 40,000 shares

Net Sell 1 txn

Insider Saltz Aaron

Role CHIEF LEGAL OFFICER

Sold 40,000 shs ($936K)

Share of Position Sold 15.1%

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	40,000	$23.41	$936K

Holdings After Transaction: Common Stock — 224,389 shares (Direct)

Holdings Before and After: Common Stock, 264,389 to 224,389 shares (Direct)

Other Insiders: 5 other insiders reported open-market sales of this stock in the 30 days up to this filing.

Footnotes (2)

1. F1. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 11, 2026.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.3667 to $23.5250, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

Key Figures

Shares sold: 40,000 shares Weighted average sale price: $23.41 per share Sale price range: $23.3667 to $23.5250 per share +2 more

5 metrics

Shares sold 40,000 shares Common stock sale by Chief Legal Officer on September 10, 2026

Weighted average sale price $23.41 per share Open-market sale of 40,000 shares

Sale price range $23.3667 to $23.5250 per share Multiple transactions aggregated into the reported sale

Shares held after transaction 224,389 shares Direct ownership by Aaron Salt after the September 10, 2026 sale

Number of sale transactions 1 transaction Non-derivative common stock sale reported in this filing

Key Terms

Rule 10b5-1 trading plan, weighted average price, open-market transaction

3 terms

Rule 10b5-1 trading plan regulatory

"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open-market transaction financial

"Sale in open market or private transaction"

An open-market transaction is a buy or sell of a company's shares or other securities conducted on a public exchange at the current market price, rather than through a private agreement. Investors watch these trades because they change the number of shares available and can move the price immediately—similar to how a large purchase at a busy store can raise demand and affect the checkout price—so such activity can signal market sentiment and alter ownership stakes.

FAQ

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

What insider transaction did MGNI report for Chief Legal Officer Aaron Salt?

Magnite reported that Chief Legal Officer Aaron Salt sold 40,000 MGNI common shares on September 10, 2026 in an open-market transaction at a weighted average price of $23.41 per share, as disclosed in the insider trading report.

Does the MGNI filing indicate the sale was under a Rule 10b5-1 plan?

Yes. The filing states the transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by Aaron Salt on June 11, 2026, indicating it was pre-arranged under that plan.

How many MGNI shares does Aaron Salt hold after the reported sale?

After the sale, Aaron Salt directly holds 224,389 shares of Magnite common stock, as reported in the insider ownership figures following the transaction.

What price range were the MGNI shares sold at in this transaction?

The filing reports a weighted average price of $23.41 per share, with multiple trades executed at prices ranging from $23.3667 to $23.5250, inclusive.

How many MGNI insider share sales are included in this Form 4?

The insider report shows one sale transaction by Aaron Salt, covering 40,000 shares of Magnite common stock, with no derivative transactions or purchases reported in this filing.

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

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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).

X

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)
09/10/2026

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	09/10/2026		S(1)		40,000	D	$23.41(2)	224,389	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. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 11, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.3667 to $23.5250, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

Remarks:

	/s/ Aaron Saltz	09/11/2026
	** 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)