Katie Seitz Evans - Jun 5, 2025 Form 4 Insider Report for MAGNITE, INC. (MGNI)

Signature
/s/ Aaron Saltz, attorney-in-fact
Stock symbol
MGNI
Transactions as of
Jun 5, 2025
Transactions value $
-$535,400
Form type
4
Date filed
6/6/2025, 05:59 PM
Previous filing
May 16, 2025
Next filing
Jun 18, 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 2025-06-06 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 +4.37% $3.61 478K Jun 5, 2025 Direct F1
transaction MGNI Common Stock Sale -$608K -35K -7.33% $17.36 443K Jun 5, 2025 Direct F1, F2

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 -35.63% $0.00 36.1K Jun 5, 2025 Common Stock 20K $3.61 Direct F1, F3, F4
* 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 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.83 to $17.60 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.
F3 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.
F4 Granted as compensation for services.