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Institutional Ownership · SEC Form 13F

Who owns comScore, Inc. (SCOR)


Which tracked institutional funds hold SCOR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SCOR company fundamentals →

Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-15). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.

26
Institutional holders
5M
Shares held (tracked funds)
34.2%
Of shares outstanding

How the tape is positioned

The tracked-fund tape on SCOR is one-sided between 2025-Q4 and 2026-Q1: 3 added or opened and 1 trimmed or exited — on balance accumulating.

A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.

Conviction spread

SCOR’s largest tracked holder by dollar value, Cerberus Capital Management, L.P., sizes it at 0.9% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.9pp conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in SCOR divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.

Institutional & insider positioning

Between 2025-Q4 and 2026-Q1, across 26 tracked filers holding SCOR, 10 increased or opened the position and 6 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.

This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.

New buyers & exits

Funds opening or closing a position in SCOR between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.

New buyers 1

  • VANGUARD CAPITAL MANAGEMENT LLC$1M

Full exits 1

  • VANGUARD GROUP INC$1M

Largest adds

  • WESTERLY CAPITAL MANAGEMENT, LLC$3M
  • Cerberus Capital Management, L.P.$1M

Institutional holders

One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).

FundSharesReported value% of valueQuarter
Cerberus Capital Management, L.P.3,396,479$24M63.8%2026-Q1
WESTERLY CAPITAL MANAGEMENT, LLC added897,000$6M16.9%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new187,259$1M3.5%2026-Q1
Factor Wealth Management LTD126,656$879K2.4%2026-Q1
Beartown Capital Management, LLC126,207$876K2.4%2026-Q1
ACADIAN ASSET MANAGEMENT LLC84,079$582K1.6%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added63,723$442K1.2%2026-Q1
RENAISSANCE TECHNOLOGIES LLC trimmed40,921$284K0.8%2026-Q1
BlackRock, Inc.38,972$270K0.7%2026-Q1
MILLENNIUM MANAGEMENT LLC trimmed36,928$256K0.7%2026-Q1
SUSQUEHANNA INTERNATIONAL GROUP, LLP added20,702$144K0.4%2026-Q1
VANGUARD FIDUCIARY TRUST CO new19,077$132K0.4%2026-Q1
Byrne Asset Management LLC trimmed18,680$130K0.4%2026-Q1
STATE STREET CORP13,304$92K0.2%2026-Q1
Covestor Ltd10,376$72K0.2%2026-Q1
Vanguard Global Advisers, LLC new1,581$11K0.0%2026-Q1
Tower Research Capital LLC (TRC) added1,518$11K0.0%2026-Q1
UBS Group AG added1,159$8K0.0%2026-Q1
PNC FINANCIAL SERVICES GROUP, INC. trimmed638$4K0.0%2026-Q1
MORGAN STANLEY106$7360.0%2026-Q1
Activest Wealth Management100$6940.0%2026-Q1
RHUMBLINE ADVISERS65$4510.0%2026-Q1
BNP PARIBAS FINANCIAL MARKETS added35$2430.0%2026-Q1
WELLS FARGO & COMPANY/MN10$690.0%2026-Q1
OSAIC HOLDINGS, INC.1$70.0%2026-Q1
SBI Securities Co., Ltd.1$70.0%2026-Q1
VANGUARD GROUP INC172,729$1M3.0%2025-Q4 stale
BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed27,772$181K0.5%2025-Q4 stale
Quinn Opportunity Partners LLC15,216$133K0.4%2025-Q3 stale
CITADEL ADVISORS LLC trimmed10,955$96K0.3%2025-Q3 stale
Heron Bay Capital Management trimmed10,112$88K0.2%2025-Q3 stale
BARCLAYS PLC added4,010$27K0.1%2025-Q3 stale
ROYAL BANK OF CANADA added500$3K0.0%2025-Q1 stale
BANK OF AMERICA CORP /DE/ added91$5910.0%2025-Q4 stale
Garde Capital, Inc. trimmed100$4820.0%2025-Q2 stale
Fairman Group, LLC50$2920.0%2025-Q1 stale
CITIGROUP INC trimmed20$1750.0%2025-Q3 stale
JPMORGAN CHASE & CO trimmed9$620.0%2025-Q1 stale
RAYMOND JAMES FINANCIAL INC new5$240.0%2025-Q2 stale
FMR LLC trimmed2$160.0%2025-Q3 stale
CONCOURSE FINANCIAL GROUP SECURITIES, INC.00.0%2025-Q2 stale
LAZARD ASSET MANAGEMENT LLC trimmed880.0%2025-Q1 stale

Ownership over time

Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.

HoldersTotal shares

Reading this table

Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.

About 13F filings

A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.

Learn how to read institutional ownership