Adam Lee Soroca - Sep 2, 2025 Form 4 Insider Report for MAGNITE, INC. (MGNI)

Role
CHIEF PRODUCT OFFICER
Signature
/s/ Aaron Saltz, attorney-in-fact
Stock symbol
MGNI
Transactions as of
Sep 2, 2025
Transactions value $
-$494,018
Form type
4
Date filed
9/4/2025, 05:00 PM
Previous filing
Aug 20, 2025
Next filing
Nov 18, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Soroca Adam Lee CHIEF PRODUCT OFFICER C/O MAGNITE, INC., 1250 BROADWAY, 15TH FLOOR, NEW YORK /s/ Aaron Saltz, attorney-in-fact 2025-09-04 0001725125

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MGNI Common Stock Options Exercise $123K +25K +7.21% $4.92 371K Sep 2, 2025 Direct F1
transaction MGNI Common Stock Sale -$224K -9.27K -2.5% $24.22 362K Sep 2, 2025 Direct F1, F2
transaction MGNI Common Stock Sale -$392K -15.7K -4.34% $24.97 346K Sep 2, 2025 Direct F1, F3

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 Employee Stock Option (Right to Buy) Options Exercise $0 -25K -20.54% $0.00 96.7K Sep 2, 2025 Common Stock 25K $4.92 Direct F1, F4, F5
* 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 sale were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2025.
F2 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.74 to $24.66, 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 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.78 to $25.05, 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.
F4 The stock options have fully vested and are immediately exercisable.
F5 Granted as compensation for services.