Stephen Mills

CIK: 0001807264

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)1 (14.3%)

Derivative conversions

Awards (A)5 (71.4%)

Compensation grants

Other (G, F, J, C, D, …)1 (14.3%)

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

Companies & Roles (4)

MSGR

MSG Rangers Corp.

Director

AMCX

AMC Global Media Inc.

Director

SIGI

SELECTIVE INSURANCE GROUP INC

Director

MSGS

Madison Square Garden Sports Corp.

Director

Discretionary Trading P&L

Holdings

Transaction History (7 total)

AMCX
AMC Global Media Inc.
Sep 15, 2026
Disposition(D)
Direct
29.2K shares at avg. $12.27$359K
AMCX
AMC Global Media Inc.
Sep 15, 2026
Exercise(M)
Direct
29.2K shares at avg. $12.27$359K
SIGI
SELECTIVE INSURANCE GROUP INC
May 1, 2026
Award(A)
Direct
1.8K shares-
MSGS
Madison Square Garden Sports Corp.
Dec 8, 2025
Award(A)
Restricted Stock Units
Direct
727 shares-
AMCX
AMC Networks Inc.
Jun 5, 2025
Award(A)
Restricted Stock Units
Direct
21.2K shares-
SIGI
SELECTIVE INSURANCE GROUP INC
May 2, 2025
Award(A)
Direct
2K shares-
MSGS
Madison Square Garden Sports Corp.
Dec 4, 2024
Award(A)
Restricted Stock Units
Direct
709 shares-

		Type	Shares	Price		Ownership
Sep 15, 2026	AMCX AMC Global Media Inc.	Disposition(D)	29,236	$12.27	$358,726	Direct
Sep 15, 2026	AMCX AMC Global Media Inc.	Exercise(M)	29,236	$12.27	$358,726	Direct
May 1, 2026	SIGI SELECTIVE INSURANCE GROUP INC	Award(A)	1,767	-	$0	Direct
Dec 8, 2025	MSGS Madison Square Garden Sports Corp.	Award(A) Restricted Stock Units	727	-	-	Direct
Jun 5, 2025	AMCX AMC Networks Inc.	Award(A) Restricted Stock Units	21,194	-	-	Direct
May 2, 2025	SIGI SELECTIVE INSURANCE GROUP INC	Award(A)	2,025	-	-	Direct
Dec 4, 2024	MSGS Madison Square Garden Sports Corp.	Award(A) Restricted Stock Units	709	-	-	Direct

1-7 of 7 transactions

About Mills Stephen

Mills Stephen (SEC CIK 0001807264) files insider reports with the SEC as Director of MSG Rangers Corp. (MSGR), Director of AMC Global Media Inc. (AMCX) and Director of SELECTIVE INSURANCE GROUP INC (SIGI). Signal8 also holds filings tied to 1 other company.

Signal8 holds 8 ownership filings by Mills Stephen (2 Form 3, 6 Form 4), filed between Sep 3, 2024 and Oct 28, 2026. Those filings report 7 transactions, from Dec 4, 2024 to Sep 15, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Mills Stephen's filings is in NEW YORK, NY.

Recent filings by Mills Stephen

Sep 15, 2026: Disposition to issuer transaction of AMCX shares (Form 4, code D).
Sep 15, 2026: Option exercise of AMCX shares (Form 4, code M).
May 1, 2026: Grant or award of SIGI shares (Form 4, code A).
Dec 8, 2025: Grant or award of MSGS derivative securities (Form 4, code A).
Jun 5, 2025: Grant or award of AMCX derivative securities (Form 4, code A).

Other insiders filing for MSG Rangers Corp. (MSGR)

How to read Form 4 transaction codes