Katie Seitz Evans - 30 Jun 2025 Form 4 Insider Report for MAGNITE, INC. (MGNI)

Signature
/s/ Aaron Saltz, attorney-in-fact
Issuer symbol
MGNI
Transactions as of
30 Jun 2025
Net transactions value
-$512,909
Form type
4
Filing time
02 Jul 2025, 16:15:43 UTC
Previous filing
18 Jun 2025
Next filing
20 Aug 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 02 Jul 2025 0001700262

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MGNI Common Stock Options Exercise $58,255 +16,137 +3.6% $3.61 458,925 30 Jun 2025 Direct F1
transaction MGNI Common Stock Sale $183,876 -8,358 -1.8% $22.00 450,567 30 Jun 2025 Direct F1
transaction MGNI Common Stock Sale $387,288 -16,137 -3.6% $24.00 434,430 30 Jun 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 -16,137 -100% $0.000000 0 30 Jun 2025 Common Stock 16,137 $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.