Comparable stake leader
Pine Investor, LLC
SEC ownership of COMSCORE, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001158172.
Disclosed value leader
Cerberus Capital Management, L.P.
Comparable rows
37/50
Latest evidence
06 Jun 2026
- Public ticker
- SCOR on Nasdaq
- Parsed ownership sources
- 13D/G, 3/4/5, and 13F
- Largest SEC-reported holder
- Pine Investor, LLC
- Latest 13D/G holder
- Pine Investor, LLC
- Latest parsed ownership date
- 06 Jun 2026
- Issuer CIK
- 0001158172
- Issuer location
- Reston, VA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of COMSCORE, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Pine Investor, LLC
Disclosed value leader
Cerberus Capital Manageme...
Comparable rows
37/50
Latest evidence
06 Jun 2026
13D/G
3/4/5
13F
Lead comparable stake: 40%
13 rows are not safely comparable across share classes.
13D/G row: Pine Investor, LLC
Showing 1-8 of 50 holder rows.
Quick read
Pine Investor, LLC leads the comparable SEC ownership view at 40%.
37 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Pine Investor, LLC's linked filing trail.
Comparable ownership
Top 5
Pine Investor, LLC
40%
CHARTER COMMUNICATIONS, INC. /MO/
40%
Liberty Broadband Corp
39%
WESTERLY CAPITAL MANAGEMENT, LLC
9.4%
Irrevocable Larson Family Investm...
5.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Pine Investor, LLC |
13D/G
|
40%
|
$52,410,907
7,628,953 shares
|
+$39,834,829 | 29 Dec 2025 |
| CHARTER COMMUNICATIONS, INC. /MO/ |
3/4/5
13D/G
10%+ Owner · Charter Communications, Inc.
|
40%
from 13D/G
|
$102,072,817
7,580,235 shares
mixed-class rows
|
— | 29 Dec 2025 |
| Liberty Broadband Corp |
3/4/5
13D/G
Director, 10%+ Owner · Liberty Broadband Corporation
|
39%
from 13D/G
|
$101,443,390
7,510,446 shares
mixed-class rows
|
— | 29 Dec 2025 |
| WESTERLY CAPITAL MANAGEMENT, LLC |
13F
13D/G
Company
|
9.4%
from 13D/G
|
$6,225,180
897,000 shares
|
— | 31 Mar 2026 |
| Irrevocable Larson Family Investment Trust |
13D/G
|
5.8%
|
$1,952,083
284,146 shares
|
-$41,220 | 23 Jan 2025 |
| WPP plc |
13D/G
CAVENDISH SQUARE HOLDING B.V.
|
3.8%
|
—
565,968 shares
|
$0 | 29 Dec 2025 |
| Mount Logan Capital Inc. |
13D/G
|
1.7%
|
$1,722,096
250,669 shares
|
-$1,029,002 | 31 Dec 2025 |
| Itzhak Fisher |
3/4/5
Director
|
0.32%
|
$470,631
47,590 shares
mixed-class rows
|
— | 29 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$121,856.
Buys
$0
Insiders: 0
Sells
$121,856
Insiders: 1
Net
-$121,856
Shares: -17,843
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 17,843
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 17,843 | $0 | $121,856 | -$121,856 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 26 reporting-owner rows connected to COMSCORE, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
26
Largest Forms 3/4/5 holder
Cerberus Capital Management, L.P.
Net 12M change
-$121,856
Latest report
06 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Cerberus Capital Management, L.P. | Director, 10%+ Owner | $102,257,377 | Mixed | 29 Dec 2025 | ||
| CHARTER COMMUNICATIONS, INC. /MO/ | 10%+ Owner | $102,072,817 | Mixed | 29 Dec 2025 | ||
| Liberty Broadband Corp | Director, 10%+ Owner | $101,443,390 | Mixed | 29 Dec 2025 | ||
| William Paul Livek | Director | $1,371,636 | -$121,856 | -8.2% | Mixed | 14 Nov 2025 |
| Matthew F. McLaughlin | Director | $1,076,214 | Mixed | 01 Jul 2025 | ||
| Brent D. Rosenthal | Director | $734,522 | Mixed | 12 Jun 2024 | ||
| Itzhak Fisher | Director | $470,631 | Mixed | 29 Dec 2025 | ||
| Kathleen Love | Director | $444,524 | Mixed | 01 Jul 2024 | ||
| 180 DEGREE CAPITAL CORP. /NY/ | Other* | $411,477 | Filing P/S | 03 Apr 2024 | ||
| Martin E. Patterson | Director | $409,433 | Mixed | 29 Dec 2025 | ||
| Nana Banerjee | Director | $388,424 | Mixed | 29 Dec 2025 | ||
| Leslie Gillin | Director | $372,829 | Mixed | 29 Dec 2025 | ||
| Brian J. Wendling | Director | $367,011 | Mixed | 01 Jul 2025 | ||
| Irwin Gotlieb | Director | $319,881 | Mixed | 15 Jun 2022 | ||
| David Algranati | Chief Innovation Officer | $215,500 | Mixed | 10 Mar 2024 | ||
| Jonathan Carpenter | Chief Executive Officer, Director | $172,417 | Mixed | 29 Nov 2024 | ||
| Wilson Christopher T. | Chief Commercial Officer | $115,362 | Mixed | 20 May 2022 | ||
| Stephen Bagdasarian | Chief Commercial Officer | $87,679 | Mixed | 06 Jun 2026 | ||
| Dale Gregory T. | Chief Operating Officer | $80,300 | Mixed | 24 Aug 2022 | ||
| Gregory A. Fink | Chief Financial Officer | $31,078 | Mixed | 15 May 2021 |
Recent insider transactions for COMSCORE, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Stephen Bagdasarian | SCOR | Common Stock | Tax liability | -8.5% | -726 | 7,814 | 06 Jun 2026 | Direct | ||
| Stephen Bagdasarian | SCOR | Common Stock | Options Exercise | 40.8% | 2,475 | 8,540 | 06 Jun 2026 | Direct | ||
| Stephen Bagdasarian | SCOR | Restricted Stock Units | Options Exercise | -100% | -2,475 | 0 | 06 Jun 2026 | Direct | ||
| Cerberus Capital Management, L.P. | SCOR | Common Stock | Award | 2997.4% | 3,286,825 | 3,396,479 | 29 Dec 2025 | See Footnote | ||
| Cerberus Capital Management, L.P. | SCOR | Restricted Stock Units | Award | 5,000 | 5,000 | 29 Dec 2025 | See Footnote(2), | |||
| Cerberus Capital Management, L.P. | SCOR | Series C Convertible Preferred Stock | Award | 4,223,621 | 4,223,621 | 29 Dec 2025 | See Footnote | |||
| Cerberus Capital Management, L.P. | SCOR | Series B Convertible Preferred Stock | Disposed to Issuer | -100% | -31,928,301 | 0 | 29 Dec 2025 | See Footnote | ||
| Itzhak Fisher | SCOR | Common Stock | Options Exercise | 30.3% | 10,000 | 43,007 | 29 Dec 2025 | Direct | ||
| Itzhak Fisher | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,000 | 0 | 29 Dec 2025 | Direct | ||
| Nana Banerjee | SCOR | Common Stock | Options Exercise | 39% | 10,000 | 35,624 | 29 Dec 2025 | Direct | ||
| Nana Banerjee | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,000 | 0 | 29 Dec 2025 | Direct | ||
| Leslie Gillin | SCOR | Common Stock | Options Exercise | 42.8% | 10,000 | 33,354 | 29 Dec 2025 | Direct | ||
| Leslie Gillin | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,000 | 0 | 29 Dec 2025 | Direct | ||
| Martin Edward Patterson | SCOR | Common Stock | Options Exercise | 34.9% | 10,000 | 38,682 | 29 Dec 2025 | Direct | ||
| Martin Edward Patterson | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,000 | 0 | 29 Dec 2025 | Direct | ||
| Charter Communications, Inc. /Mo/ | SCOR | Common Stock | Award | 6601.5% | 3,286,825 | 3,336,614 | 29 Dec 2025 | See Footnote | ||
| Charter Communications, Inc. /Mo/ | SCOR | Series C Convertible Preferred Stock | Award | 4,223,621 | 4,223,621 | 29 Dec 2025 | See Footnote | |||
| Charter Communications, Inc. /Mo/ | SCOR | Series B Convertible Preferred Stock | Disposed to Issuer | -100% | -31,928,301 | 0 | 29 Dec 2025 | See Footnote | ||
| Liberty Broadband Corp | SCOR | Common Stock | Award | 3,286,825 | 3,286,825 | 29 Dec 2025 | Direct | |||
| Liberty Broadband Corp | SCOR | Series C Convertible Preferred Stock | Award | 4,223,621 | 4,223,621 | 29 Dec 2025 | Direct | |||
| Liberty Broadband Corp | SCOR | Series B Convertible Preferred Stock | Disposed to Issuer | -100% | -31,928,301 | 0 | 29 Dec 2025 | Direct | ||
| William Paul Livek | SCOR | Common Stock | Sale | -5.02% | $64,845 | $6.55 | -9,900 | 187,473 | 14 Nov 2025 | Direct |
| William Paul Livek | SCOR | Common Stock | Sale | -1% | $13,723 | $6.85 | -2,002 | 197,373 | 12 Nov 2025 | Direct |
| William Paul Livek | SCOR | Common Stock | Sale | -1.84% | $26,589 | $7.12 | -3,735 | 199,375 | 11 Nov 2025 | Direct |
| William Paul Livek | SCOR | Common Stock | Sale | -1.07% | $16,699 | $7.57 | -2,206 | 203,110 | 10 Nov 2025 | Direct |
| Stephen Bagdasarian | SCOR | Common Stock | Tax liability | -5.69% | -366 | 6,065 | 26 Sep 2025 | Direct | ||
| Stephen Bagdasarian | SCOR | Common Stock | Options Exercise | 24.1% | 1,250 | 6,431 | 26 Sep 2025 | Direct | ||
| Stephen Bagdasarian | SCOR | Restricted Stock Units | Options Exercise | -50% | -1,250 | 1,250 | 26 Sep 2025 | Direct | ||
| Charter Communications, Inc. /Mo/ | SCOR | Restricted Stock Units | Award | 20,000 | 20,000 | 01 Jul 2025 | See Footnote | |||
| Itzhak Fisher | SCOR | Restricted Stock Units | Award | 10,000 | 10,000 | 01 Jul 2025 | Direct | |||
| Brian J. Wendling | SCOR | Restricted Stock Units | Award | 10,000 | 10,000 | 01 Jul 2025 | Direct | |||
| William Paul Livek | SCOR | Restricted Stock Units | Award | 10,000 | 10,000 | 01 Jul 2025 | Direct | |||
| Matthew F. McLaughlin | SCOR | Restricted Stock Units | Award | 10,000 | 10,000 | 01 Jul 2025 | Direct | |||
| Martin Edward Patterson | SCOR | Restricted Stock Units | Award | 10,000 | 10,000 | 01 Jul 2025 | Direct | |||
| Nana Banerjee | SCOR | Restricted Stock Units | Award | 10,000 | 10,000 | 01 Jul 2025 | Direct | |||
| Leslie Gillin | SCOR | Restricted Stock Units | Award | 10,000 | 10,000 | 01 Jul 2025 | Direct | |||
| Brian J. Wendling | SCOR | Common Stock | Options Exercise | 49.3% | 10,739 | 32,507 | 17 Jun 2025 | Direct | ||
| Brian J. Wendling | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,739 | 0 | 17 Jun 2025 | Direct | ||
| Matthew F. McLaughlin | SCOR | Common Stock | Options Exercise | 8.59% | 10,739 | 135,739 | 17 Jun 2025 | Direct | ||
| Matthew F. McLaughlin | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,739 | 0 | 17 Jun 2025 | Direct | ||
| Martin Edward Patterson | SCOR | Common Stock | Options Exercise | 59.8% | 10,739 | 28,682 | 17 Jun 2025 | Direct | ||
| Martin Edward Patterson | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,739 | 0 | 17 Jun 2025 | Direct | ||
| William Paul Livek | SCOR | Common Stock | Options Exercise | 5.52% | 10,739 | 205,316 | 17 Jun 2025 | Direct | ||
| William Paul Livek | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,739 | 0 | 17 Jun 2025 | Direct | ||
| Leslie Gillin | SCOR | Common Stock | Options Exercise | 85.1% | 10,739 | 23,354 | 17 Jun 2025 | Direct | ||
| Leslie Gillin | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,739 | 0 | 17 Jun 2025 | Direct | ||
| Itzhak Fisher | SCOR | Common Stock | Options Exercise | 48.2% | 10,739 | 33,007 | 17 Jun 2025 | Direct | ||
| Itzhak Fisher | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,739 | 0 | 17 Jun 2025 | Direct | ||
| Nana Banerjee | SCOR | Common Stock | Options Exercise | 72.2% | 10,739 | 25,624 | 17 Jun 2025 | Direct | ||
| Nana Banerjee | SCOR | Restricted Stock Units | Options Exercise | -100% | -10,739 | 0 | 17 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.