STOCK TITAN

PSU vesting boosts Magnite (NASDAQ: MGNI) CFO share holdings filing

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Magnite, Inc.'s chief financial officer David Day reported the vesting of performance-based stock units and related tax withholding. On January 9, 2026, he acquired 72,675 shares of common stock at $0 per share upon the vesting of performance stock units granted under Magnite's Amended and Restated 2014 Equity Incentive Plan. The number of units that vested was based on the company achieving 126.35% of its performance goal over a three-year total stockholder return period relative to the Russell 2000 index.

To cover tax withholding obligations from this vesting, 35,169 shares of common stock were automatically forfeited at a price of $16.17 per share pursuant to an arrangement mandated by the company, rather than an open-market sale decision by the executive. After these transactions, Day directly beneficially owned 538,076 shares of Magnite common stock.

Positive

  • None.

Negative

  • None.
Insider Day David
Role CHIEF FINANCIAL OFFICER
Type Security Shares Price Value
Exercise Performance Stock Units 72,675 $0.00 --
Exercise Common Stock 72,675 $0.00 --
Tax Withholding Common Stock 35,169 $16.17 $569K
Holdings After Transaction: Performance Stock Units — 0 shares (Direct); Common Stock — 573,245 shares (Direct)
Footnotes (1)
  1. Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan. Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of the performance stock units ("PSUs") being reported herein. Each PSU represents a contingent right to receive, on vesting, one share of the Issuer's common stock, subject to Issuer performance as more specifically described in Footnote 4 herein. Vesting of the PSU was determined based on the Issuer's total stockholder return ("TSR") for the three-year period beginning on January 1, 2023 relative to the TSRs of the companies in the Russell 2000 index over that period. The number of PSUs reported in column 5 on the Form 4 filed with the Securities and Exchange Commission on January 4, 2023 reflected the target number of PSUs initially subject to the award. The award was eligible to vest as to 0% to 150% of the target number of PSUs. On January 9, 2026, the Compensation Committee of the Issuer's Board of Directors determined that, based on 126.35% achievement, the Reporting Person actually vested 72,675 shares.
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).
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*
Day David

(Last) (First) (Middle)
C/O MAGNITE, INC.
1250 BROADWAY, 9TH FLOOR

(Street)
NEW YORK NY 10001

(City) (State) (Zip)
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 FINANCIAL OFFICER
3. Date of Earliest Transaction (Month/Day/Year)
01/09/2026
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
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 01/09/2026 M 72,675 A $0(1) 573,245 D
Common Stock 01/09/2026 F(2) 35,169 D $16.17 538,076 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
Performance Stock Units (3) 01/09/2026 M 72,675 (4) (4) Common Stock 72,675 $0(1) 0 D
Explanation of Responses:
1. Equity grant under the Company's Amended and Restated 2014 Equity Incentive Plan.
2. Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of the performance stock units ("PSUs") being reported herein.
3. Each PSU represents a contingent right to receive, on vesting, one share of the Issuer's common stock, subject to Issuer performance as more specifically described in Footnote 4 herein.
4. Vesting of the PSU was determined based on the Issuer's total stockholder return ("TSR") for the three-year period beginning on January 1, 2023 relative to the TSRs of the companies in the Russell 2000 index over that period. The number of PSUs reported in column 5 on the Form 4 filed with the Securities and Exchange Commission on January 4, 2023 reflected the target number of PSUs initially subject to the award. The award was eligible to vest as to 0% to 150% of the target number of PSUs. On January 9, 2026, the Compensation Committee of the Issuer's Board of Directors determined that, based on 126.35% achievement, the Reporting Person actually vested 72,675 shares.
/s/ Aaron Saltz, attorney-in-fact 01/12/2026
** 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.

FAQ

Who is the insider in the Magnite (MGNI) Form 4 filing and what is their role?

The insider is David Day, who serves as Chief Financial Officer of Magnite, Inc. He is identified as an officer and not a director or 10% owner.

What equity award vested for Magnite (MGNI) CFO David Day in this Form 4?

The filing shows the vesting of performance stock units (PSUs), each representing a contingent right to receive one share of Magnite common stock. On January 9, 2026, these PSUs vested into 72,675 shares of common stock at $0 per share.

How was the number of vested PSUs for Magnite (MGNI) determined?

The number of vested PSUs was based on Magnite's total stockholder return (TSR) for the three-year period beginning January 1, 2023, measured against companies in the Russell 2000 index. The award could vest between 0% and 150% of target, and the Compensation Committee determined that 126.35% achievement resulted in 72,675 shares vesting.

Did the Magnite (MGNI) CFO sell shares in the open market in this Form 4?

The Form 4 reports a transaction coded "F" for 35,169 shares of common stock at $16.17 per share, described as a non-discretionary forfeiture of shares. These shares were withheld by Magnite to cover tax withholding obligations on the PSU vesting, rather than being a discretionary open-market sale by the CFO.

How many Magnite (MGNI) shares does the CFO own after these transactions?

Following the vesting of the performance stock units and the tax-related share forfeiture, the Form 4 reports that David Day directly beneficially owned 538,076 shares of Magnite common stock.

Under what plan were the performance stock units for Magnite (MGNI) granted?

The performance stock units that vested into 72,675 shares were granted under Magnite's Amended and Restated 2014 Equity Incentive Plan, as noted in the footnotes to the filing.