David Day

CIK: 0001523288

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)10 (37.0%)

Position reduction

Option Exercises (M)5 (18.5%)

Derivative conversions

Awards (A)2 (7.4%)

Compensation grants

Other (G, F, J, C, D, …)10 (37.0%)

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 (27 total)

MGNI
MAGNITE, INC.
Aug 15, 2026
Tax Payment(F)
Direct
14.2K shares at avg. $24.73$350K
MGNI
MAGNITE, INC.
Aug 13, 2026
Gift(G)
Direct
26.3K shares-
MGNI
MAGNITE, INC.
May 15, 2026
Tax Payment(F)
Direct
14.2K shares at avg. $12.82$182K
MGNI
MAGNITE, INC.
Feb 15, 2026
Tax Payment(F)
Direct
30.6K shares at avg. $11.70$358K
MGNI
MAGNITE, INC.
Jan 9, 2026
Tax Payment(F)
Direct
35.2K shares at avg. $16.17$569K
MGNI
MAGNITE, INC.
Jan 9, 2026
Exercise(M)
Direct
72.7K shares-
MGNI
MAGNITE, INC.
Jan 1, 2026
Award(A)
Direct
131.7K shares-
MGNI
MAGNITE, INC.
Nov 15, 2025
Tax Payment(F)
Direct
13.2K shares at avg. $14.15$187K
MGNI
MAGNITE, INC.
Aug 18, 2025
Sale(S)
Direct
13.4K shares at avg. $23.85$319K
MGNI
MAGNITE, INC.
Aug 15, 2025
Gift(G)
Direct
26.4K shares-
MGNI
MAGNITE, INC.
Jun 30, 2025
Sale(S)
Direct
21.7K shares at avg. $22.00$477K
MGNI
MAGNITE, INC.
Jun 26, 2025
Exercise(M)
Direct
36K shares at avg. $5.28$190K
MGNI
MAGNITE, INC.
Jun 26, 2025
Sale(S)
Direct
36K shares at avg. $20.95$754K
MGNI
MAGNITE, INC.
Jun 24, 2025
Exercise(M)
Direct
35K shares at avg. $5.28$185K
MGNI
MAGNITE, INC.
Jun 24, 2025
Sale(S)
Direct
35K shares at avg. $19.95$698K
MGNI
MAGNITE, INC.
Jun 18, 2025
Sale(S)
Direct
38.1K shares at avg. $18.95$723K
MGNI
MAGNITE, INC.
Jun 18, 2025
Exercise(M)
Direct
38.1K shares at avg. $4.92$188K
MGNI
MAGNITE, INC.
May 15, 2025
Tax Payment(F)
Direct
13.9K shares at avg. $15.88$220K
MGNI
MAGNITE, INC.
Feb 15, 2025
Tax Payment(F)
Direct
31.1K shares at avg. $20.00$622K
MGNI
MAGNITE, INC.
Feb 7, 2025
Exercise(M)
Direct
39K shares at avg. $4.92$192K
MGNI
MAGNITE, INC.
Feb 7, 2025
Sale(S)
Direct
39K shares at avg. $20.00$780K
MGNI
MAGNITE, INC.
Feb 6, 2025
Sale(S)
Direct
13.2K shares at avg. $18.35$243K
MGNI
MAGNITE, INC.
Jan 9, 2025
Award(A)
Direct
127.7K shares-
MGNI
MAGNITE, INC.
Jan 3, 2025
Sale(S)
Direct
13.3K shares at avg. $17.00$227K
MGNI
MAGNITE, INC.
Dec 17, 2024
Sale(S)
Direct
13.5K shares at avg. $16.32$220K

		Type	Shares	Price		Ownership
Aug 15, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	14,170	$24.73	$350,424	Direct
Aug 13, 2026	MGNI MAGNITE, INC.	Gift(G)	26,258	-	$0	Direct
May 15, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	14,170	$12.82	$181,659	Direct
Feb 15, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	30,617	$11.70	$358,219	Direct
Jan 9, 2026	MGNI MAGNITE, INC.	Tax Payment(F)	35,169	$16.17	$568,683	Direct
Jan 9, 2026	MGNI MAGNITE, INC.	Exercise(M)	72,675	-	$0	Direct
Jan 1, 2026	MGNI MAGNITE, INC.	Award(A)	131,661	-	$0	Direct
Nov 15, 2025	MGNI MAGNITE, INC.	Tax Payment(F)	13,197	$14.15	$186,738	Direct
Aug 18, 2025	MGNI MAGNITE, INC.	Sale(S)	13,366	$23.85	$318,779	Direct
Aug 15, 2025	MGNI MAGNITE, INC.	Gift(G)	26,374	-	-	Direct
Jun 30, 2025	MGNI MAGNITE, INC.	Sale(S)	21,682	$22.00	$477,004	Direct
Jun 26, 2025	MGNI MAGNITE, INC.	Exercise(M)	36,000	$5.28	$190,080	Direct
Jun 26, 2025	MGNI MAGNITE, INC.	Sale(S)	36,000	$20.95	$754,200	Direct
Jun 24, 2025	MGNI MAGNITE, INC.	Exercise(M)	35,000	$5.28	$184,800	Direct
Jun 24, 2025	MGNI MAGNITE, INC.	Sale(S)	35,000	$19.95	$698,250	Direct
Jun 18, 2025	MGNI MAGNITE, INC.	Sale(S)	38,146	$18.95	$722,867	Direct
Jun 18, 2025	MGNI MAGNITE, INC.	Exercise(M)	38,146	$4.92	$187,678	Direct
May 15, 2025	MGNI MAGNITE, INC.	Tax Payment(F)	13,865	$15.88	$220,176	Direct
Feb 15, 2025	MGNI MAGNITE, INC.	Tax Payment(F)	31,113	$20.00	$622,260	Direct
Feb 7, 2025	MGNI MAGNITE, INC.	Exercise(M)	39,000	$4.92	$191,880	Direct
Feb 7, 2025	MGNI MAGNITE, INC.	Sale(S)	39,000	$20.00	$780,000	Direct
Feb 6, 2025	MGNI MAGNITE, INC.	Sale(S)	13,245	$18.35	$243,046	Direct
Jan 9, 2025	MGNI MAGNITE, INC.	Award(A)	127,737	-	$0	Direct
Jan 3, 2025	MGNI MAGNITE, INC.	Sale(S)	13,345	$17.00	$226,865	Direct
Dec 17, 2024	MGNI MAGNITE, INC.	Sale(S)	13,500	$16.32	$220,320	Direct

1-25 of 27 transactions

About Day David

Day David (SEC CIK 0001523288) files insider reports with the SEC as CHIEF FINANCIAL OFFICER of MAGNITE, INC. (MGNI).

Signal8 holds 19 ownership filings by Day David, all Form 4s, filed between Nov 19, 2024 and Aug 18, 2026. Those filings report 27 transactions, from Nov 15, 2024 to Aug 15, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Day David's filings is in NEW YORK, NY.

Recent filings by Day David

Aug 15, 2026: Tax withholding of MGNI shares (Form 4, code F).
Aug 13, 2026: Gift of MGNI shares (Form 4, code G).
May 15, 2026: Tax withholding of MGNI shares (Form 4, code F).
Feb 15, 2026: Tax withholding of MGNI shares (Form 4, code F).
Jan 9, 2026: Tax withholding of MGNI shares (Form 4, code F).

Other insiders filing for MAGNITE, INC. (MGNI)

Caine Paul, Director
Sullivan Haas, CHIEF ACCOUNTING OFFICER
Gephart Brian, CHIEF FINANCIAL OFFICER
Knopper Douglas S, Director
Buonasera David, CHIEF TECHNOLOGY OFFICER
Spillane Robert F, Director

How to read Form 4 transaction codes