Robert F. Spillane

CIK: 0001603808

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)5 (62.5%)

Position reduction

Option Exercises (M)1 (12.5%)

Derivative conversions

Awards (A)2 (25.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

MGNI

MAGNITE, INC.

Director

Discretionary Trading P&L

Holdings

Transaction History (8 total)

MGNI
MAGNITE, INC.
Sep 14, 2026
Exercise(M)
Direct
10.4K shares at avg. $5.17$54K
MGNI
MAGNITE, INC.
Sep 14, 2026
Sale(S)
Direct
10.4K shares at avg. $23.76$246K
MGNI
MAGNITE, INC.
Jun 8, 2026
Award(A)
Direct
13.8K shares-
MGNI
MAGNITE, INC.
May 19, 2026
Sale(S)
Direct
10K shares at avg. $13.33$133K
MGNI
MAGNITE, INC.
Nov 21, 2025
Sale(S)
Direct
12.5K shares at avg. $14.22$178K
MGNI
MAGNITE, INC.
Jun 10, 2025
Sale(S)
Direct
15K shares at avg. $17.57$264K
MGNI
MAGNITE, INC.
Jun 5, 2025
Award(A)
Direct
10.8K shares-
MGNI
MAGNITE, INC.
Nov 20, 2024
Sale(S)
Direct
12.5K shares at avg. $16.12$202K

		Type	Shares	Price		Ownership
Sep 14, 2026	MGNI MAGNITE, INC.	Exercise(M)	10,363	$5.17	$53,577	Direct
Sep 14, 2026	MGNI MAGNITE, INC.	Sale(S)	10,363	$23.76	$246,225	Direct
Jun 8, 2026	MGNI MAGNITE, INC.	Award(A)	13,798	-	$0	Direct
May 19, 2026	MGNI MAGNITE, INC.	Sale(S)	10,000	$13.33	$133,300	Direct
Nov 21, 2025	MGNI MAGNITE, INC.	Sale(S)	12,500	$14.22	$177,750	Direct
Jun 10, 2025	MGNI MAGNITE, INC.	Sale(S)	15,000	$17.57	$263,550	Direct
Jun 5, 2025	MGNI MAGNITE, INC.	Award(A)	10,766	-	-	Direct
Nov 20, 2024	MGNI MAGNITE, INC.	Sale(S)	12,500	$16.12	$201,500	Direct

1-8 of 8 transactions

About Spillane Robert F

Spillane Robert F (SEC CIK 0001603808) files insider reports with the SEC as Director of MAGNITE, INC. (MGNI).

Signal8 holds 7 ownership filings by Spillane Robert F, all Form 4s, filed between Nov 22, 2024 and Sep 16, 2026. Those filings report 8 transactions, from Nov 20, 2024 to Sep 14, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Spillane Robert F's filings is in NEW YORK, NY.

Recent filings by Spillane Robert F

Sep 14, 2026: Option exercise of MGNI shares (Form 4, code M).
Sep 14, 2026: Open-market sale of MGNI shares (Form 4, code S).
Jun 8, 2026: Grant or award of MGNI shares (Form 4, code A).
May 19, 2026: Open-market sale of MGNI shares (Form 4, code S).
Nov 21, 2025: Open-market sale of MGNI shares (Form 4, code S).

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
Evans Katie Seitz

How to read Form 4 transaction codes