Katie Seitz Evans - Jun 16, 2025 Form 4 Insider Report for MAGNITE, INC. (MGNI)

Signature
/s/ Aaron Saltz, attorney-in-fact
Stock symbol
MGNI
Transactions as of
Jun 16, 2025
Transactions value $
-$297,800
Form type
4
Date filed
6/18/2025, 04:48 PM
Previous filing
Jun 6, 2025
Next filing
Jul 2, 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Evans Katie Seitz President, Operations C/O MAGNITE, INC., 1250 BROADWAY, 15TH FLOOR, NEW YORK /s/ Aaron Saltz, attorney-in-fact 2025-06-18 0001700262

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MGNI Common Stock Options Exercise $72.2K +20K +4.52% $3.61 463K Jun 16, 2025 Direct F1
transaction MGNI Common Stock Sale -$370K -20K -4.32% $18.50 443K Jun 16, 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MGNI Stock Option (Right to Buy) Options Exercise $0 -20K -55.34% $0.00 16.1K Jun 16, 2025 Common Stock 20K $3.61 Direct F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 This exercise and subsequent sales were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2025.
F2 25% of the total number of shares underlying this option vested on February 14, 2019 and the remaining shares vested 1/36 per month over the next 36 months thereafter.
F3 Granted as compensation for services.