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Livermore
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Comscore, Inc.

SCOR
Exchange
Nasdaq
Industry
Services-Business Services, NEC
SEC CIK
0001158172

In the last 90 days, Comscore, Inc. insiders filed 4 open-market purchases and 0 sales; 28 institutions reported holding it in 13F filings for Q2 2026, worth $42.6M in total; no superinvestor holds it.

Holders of 5% or more of SCOR

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Comscore, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of SCOR
HolderLatest formStakeChangeFirst filedLatest filingFiling
Pine Investor, LLC13D/A39.90%7.63M shares+12.70 ppfrom 27.20%Mar 18, 20253 filingsDec 31, 2025SEC
Charter Communications, Inc.13D/A39.50%7.56M shares+14.95 ppfrom 24.55%Sep 30, 20252 filingsDec 31, 2025SEC
Liberty Broadband Corp13D/A39.30%7.51M shares+13.80 ppfrom 25.50%Sep 30, 20252 filingsDec 31, 2025SEC
Westerly Capital Management, LLC13G/A9.40%470.0K shares–Feb 17, 20261 filingFeb 17, 2026SEC
Irrevocable Larson Family Investment Trust13G/A5.80%284.1K shares−0.10 ppfrom 5.90%May 15, 20248 filingsJan 28, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

19 Schedule 13D and 13G filings on Comscore, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on SCOR
Filed (ET)FilerFormStakeChangeEvent dateFiling
May 6, 202610:59 AM ETWPP plcand 1 other13D/A3.80%566.0K shares–Below 5%Dec 29, 2025SEC
Feb 17, 20264:57 PM ETWesterly Capital Management, LLCand 2 others13G/A9.40%470.0K shares–Dec 31, 2025SEC
Feb 3, 20264:35 PM ETMount Logan Capital Inc.13G/A1.70%250.7K shares−6.30 ppfrom 8.00%Below 5%Dec 31, 2025SEC
Dec 31, 20255:38 PM ETPine Investor, LLCand 1 other13D/A39.90%7.63M shares+12.70 ppfrom 27.20%Dec 29, 2025SEC
Dec 31, 20254:20 PM ETCharter Communications, Inc.and 4 others13D/A39.50%7.56M shares+14.95 ppfrom 24.55%Dec 29, 2025SEC
Dec 31, 20254:08 PM ETLiberty Broadband Corp13D/A39.30%7.51M shares+13.80 ppfrom 25.50%Dec 29, 2025SEC
Sep 30, 20259:43 PM ETLiberty Broadband Corp13D/A25.50%1.72M shares–Sep 26, 2025SEC
Sep 30, 20258:53 PM ETCharter Communications, Inc.and 4 others13D/A24.55%1.63M shares–Sep 26, 2025SEC
Sep 30, 20254:30 PM ETPine Investor, LLCand 1 other13D/A27.20%1.83M shares0.00 ppfrom 27.20%Sep 26, 2025SEC
Sep 16, 20254:54 PM ETMount Logan Capital Inc.13G8.00%400.5K sharesNewSep 12, 2025SEC
Mar 18, 20254:30 PM ETPine Investor, LLCand 1 other13D/A27.20%1.79M shares–Mar 14, 2025SEC
Jan 28, 20251:07 PM ETIrrevocable Larson Family Investment Trust13G/A5.80%284.1K shares−0.10 ppfrom 5.90%Jan 23, 2025SEC
Dec 27, 20243:25 PM ETIrrevocable Larson Family Investment Trust13G/A5.90%290.1K shares−0.70 ppfrom 6.60%Dec 9, 2024SEC
Oct 29, 20247:05 PM ETIrrevocable Larson Family Investment Trust13G/A6.60%322.3K shares+0.40 ppfrom 6.20%Oct 25, 2024SEC
Aug 20, 20242:42 PM ETIrrevocable Larson Family Investment Trust13G/A6.20%301.3K shares+0.20 ppfrom 6.00%Aug 16, 2024SEC
Jun 25, 20244:47 PM ETIrrevocable Larson Family Investment Trust13G/A6.00%290.5K shares+0.30 ppfrom 5.70%Jun 20, 2024SEC
Jun 13, 20246:46 PM ETIrrevocable Larson Family Investment Trust13G/A5.70%276.5K shares+0.20 ppfrom 5.50%Jun 11, 2024SEC
May 30, 20244:03 PM ETIrrevocable Larson Family Investment Trust13G/A5.50%266.5K shares+0.40 ppfrom 5.10%May 30, 2024SEC
May 15, 20243:36 PM ETIrrevocable Larson Family Investment Trust13G5.10%245.0K sharesNewMay 14, 2024SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Comscore, Inc. shares.

No Form 144 notices for Comscore, Inc. are on file.