Gephart Brian
SEC insider (Form 3/4/5 filer). CIK 0001778484. CHIEF FINANCIAL OFFICER at MAGNITE, INC. (MGNI). 17 reported Form 4/5 transactions since Sep 2024; latest on Oct 1, 2026. Located in NEW YORK, NY.
Companies Gephart Brian has filed insider reports for
- MAGNITE, INC. (MGNI): Officer, CHIEF FINANCIAL OFFICER
Gephart Brian
CIK: 0001778484
Transaction Breakdown
Open Market Buys (P)0 (0.0%)
High conviction signal
Open Market Sales (S)7 (41.2%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)3 (17.6%)
Compensation grants
Other (G, F, J, C, D, …)7 (41.2%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
MGNI
MAGNITE, INC.
Officer
Discretionary Trading P&L
Holdings
Transaction History (17 total)
- Oct 1, 2026MGNI
MAGNITE, INC.
AwardDirect64.7K shares- - Aug 15, 2026MGNI
MAGNITE, INC.
Tax PaymentDirect3.8K shares at avg. $24.73$94K - Aug 10, 2026MGNI
MAGNITE, INC.
SaleDirect12.5K shares at avg. $24.68$308K - May 15, 2026MGNI
MAGNITE, INC.
Tax PaymentDirect3.8K shares at avg. $12.82$49K - Feb 15, 2026MGNI
MAGNITE, INC.
Tax PaymentDirect6.1K shares at avg. $11.70$72K - Jan 1, 2026MGNI
MAGNITE, INC.
AwardDirect39.2K shares- - Nov 15, 2025MGNI
MAGNITE, INC.
Tax PaymentDirect3.5K shares at avg. $14.15$50K - Sep 4, 2025MGNI
MAGNITE, INC.
SaleDirect27.7K shares at avg. $24.71$684K - Aug 18, 2025MGNI
MAGNITE, INC.
SaleDirect3K shares at avg. $23.85$71K - May 15, 2025MGNI
MAGNITE, INC.
Tax PaymentDirect3K shares at avg. $15.88$48K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 1, 2026 | MGNI MAGNITE, INC. | Award | 64,682 | - | $0 | Direct |
| Aug 15, 2026 | MGNI MAGNITE, INC. | Tax Payment | 3,789 | $24.73 | $93,702 | Direct |
| Aug 10, 2026 | MGNI MAGNITE, INC. | Sale | 12,479 | $24.68 | $307,982 | Direct |
| May 15, 2026 | MGNI MAGNITE, INC. | Tax Payment | 3,789 | $12.82 | $48,575 | Direct |
| Feb 15, 2026 | MGNI MAGNITE, INC. | Tax Payment | 6,149 | $11.70 | $71,943 | Direct |
| Jan 1, 2026 | MGNI MAGNITE, INC. | Award | 39,185 | - | $0 | Direct |
| Nov 15, 2025 | MGNI MAGNITE, INC. | Tax Payment | 3,549 | $14.15 | $50,218 | Direct |
| Sep 4, 2025 | MGNI MAGNITE, INC. | Sale | 27,671 | $24.71 | $683,750 | Direct |
| Aug 18, 2025 | MGNI MAGNITE, INC. | Sale | 2,961 | $23.85 | $70,620 | Direct |
| May 15, 2025 | MGNI MAGNITE, INC. | Tax Payment | 3,045 | $15.88 | $48,355 | Direct |
1-10 of 17 transactions