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Institutional Ownership · SEC Form 13F

Who owns MCY (MCY)


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

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

306
Institutional holders
24,566,368
Shares held (tracked funds)
44.4%
Of shares outstanding

How the tape is positioned

54 tracked funds added or opened MCY while 75 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.

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

MCY’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes MCY more heavily than its largest holder by dollar value does.

Book-share is each fund’s reported value in MCY 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 306 tracked filers holding MCY, 168 increased or opened the position and 136 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 MCY 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 16

  • VANGUARD PORTFOLIO MANAGEMENT LLC$151M
  • VANGUARD CAPITAL MANAGEMENT LLC$108M
  • VANGUARD FIDUCIARY TRUST CO$15M
  • MARSHALL WACE, LLP$12M
  • Allianz Asset Management GmbH$10M
  • Candriam S.C.A.$6M

Full exits 22

  • VANGUARD GROUP INC$271M
  • LAKEWOOD CAPITAL MANAGEMENT, LP$15M
  • TWO SIGMA ADVISERS, LP$13M
  • Informed Momentum Co LLC$4M
  • GROUP ONE TRADING LLC$3M
  • Weiss Asset Management LP$3M

Largest adds

  • Invesco Ltd.$19M
  • UBS Group AG$15M
  • ALGERT GLOBAL LLC$8M
  • JPMORGAN CHASE & CO$7M
  • GEODE CAPITAL MANAGEMENT, LLC$7M
  • AMERICAN CENTURY COMPANIES INC$6M

Largest trims

  • BlackRock, Inc.$187M
  • WESTWOOD HOLDINGS GROUP INC$22M
  • Park West Asset Management LLC$14M
  • RENAISSANCE TECHNOLOGIES LLC$10M
  • DIMENSIONAL FUND ADVISORS LP$8M
  • STATE STREET CORP$7M

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
BlackRock, Inc. trimmed2,847,850$251M10.3%2026-Q1
Rubric Capital Management LP added2,154,504$190M7.8%2026-Q1
DIMENSIONAL FUND ADVISORS LP added2,149,647$189M7.7%2026-Q1
VANGUARD PORTFOLIO MANAGEMENT LLC new1,717,862$151M6.2%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new1,226,459$108M4.4%2026-Q1
STATE STREET CORP trimmed1,099,091$97M4.0%2026-Q1
RENAISSANCE TECHNOLOGIES LLC trimmed823,582$73M3.0%2026-Q1
AMERICAN CENTURY COMPANIES INC added813,320$72M2.9%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added754,127$66M2.7%2026-Q1
DG Capital Management, LLC trimmed594,377$52M2.1%2026-Q1
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added574,897$51M2.1%2026-Q1
Invesco Ltd. added543,757$48M2.0%2026-Q1
MORGAN STANLEY trimmed378,172$33M1.4%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed357,279$31M1.3%2026-Q1
JACOBS LEVY EQUITY MANAGEMENT, INC trimmed352,849$31M1.3%2026-Q1
AQR CAPITAL MANAGEMENT LLC added348,499$31M1.3%2026-Q1
UBS Group AG added307,171$27M1.1%2026-Q1
TWO SIGMA INVESTMENTS, LP added289,047$25M1.0%2026-Q1
NORTHERN TRUST CORP added269,738$24M1.0%2026-Q1
Philosophy Capital Management LLC added257,296$23M0.9%2026-Q1
Nuveen, LLC trimmed255,495$23M0.9%2026-Q1
WESTWOOD HOLDINGS GROUP INC trimmed251,025$22M0.9%2026-Q1
Bank of New York Mellon Corp trimmed243,500$21M0.9%2026-Q1
BNP PARIBAS FINANCIAL MARKETS added217,713$19M0.8%2026-Q1
GOLDMAN SACHS GROUP INC added193,129$17M0.7%2026-Q1
Park West Asset Management LLC trimmed193,006$17M0.7%2026-Q1
JPMORGAN CHASE & CO added189,128$17M0.7%2026-Q1
PRINCIPAL FINANCIAL GROUP INC added178,064$16M0.6%2026-Q1
VANGUARD FIDUCIARY TRUST CO new172,423$15M0.6%2026-Q1
ALGERT GLOBAL LLC added170,213$15M0.6%2026-Q1
Baird Financial Group, Inc. trimmed145,640$13M0.5%2026-Q1
SEI INVESTMENTS CO trimmed141,647$12M0.5%2026-Q1
MARSHALL WACE, LLP added136,647$12M0.5%2026-Q1
Connor, Clark & Lunn Investment Management Ltd. trimmed133,703$12M0.5%2026-Q1
Qube Research & Technologies Ltd trimmed119,067$10M0.4%2026-Q1
Allianz Asset Management GmbH added113,592$10M0.4%2026-Q1
CITADEL ADVISORS LLC added110,326$10M0.4%2026-Q1
RAYMOND JAMES FINANCIAL INC added110,185$10M0.4%2026-Q1
JANE STREET GROUP, LLC added107,700$9M0.4%2026-Q1
Russell Investments Group, Ltd. trimmed104,658$9M0.4%2026-Q1
Public Sector Pension Investment Board added95,134$8M0.3%2026-Q1
VOLORIDGE INVESTMENT MANAGEMENT, LLC added85,653$8M0.3%2026-Q1
VICTORY CAPITAL MANAGEMENT INC added85,307$8M0.3%2026-Q1
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added83,486$7M0.3%2026-Q1
AMERIPRISE FINANCIAL INC trimmed82,385$7M0.3%2026-Q1
FEDERATED HERMES, INC. added81,988$7M0.3%2026-Q1
Assenagon Asset Management S.A. added80,077$7M0.3%2026-Q1
Aptus Capital Advisors, LLC added79,715$7M0.3%2026-Q1
BANK OF AMERICA CORP /DE/ added74,938$7M0.3%2026-Q1
PEAK6 LLC added74,346$7M0.3%2026-Q1
O'SHAUGHNESSY ASSET MANAGEMENT, LLC added74,018$7M0.3%2026-Q1
Legal & General Group Plc trimmed73,184$6M0.3%2026-Q1
RHUMBLINE ADVISERS added71,477$6M0.3%2026-Q1
Candriam S.C.A. added66,774$6M0.2%2026-Q1
FIRST TRUST ADVISORS LP added62,181$5M0.2%2026-Q1
IEQ CAPITAL, LLC trimmed60,497$5M0.2%2026-Q1
PRUDENTIAL FINANCIAL INC added59,962$5M0.2%2026-Q1
LSV ASSET MANAGEMENT55,700$5M0.2%2026-Q1
Swiss National Bank54,700$5M0.2%2026-Q1
Trexquant Investment LP trimmed52,758$5M0.2%2026-Q1
MILLENNIUM MANAGEMENT LLC trimmed48,890$4M0.2%2026-Q1
Engineers Gate Manager LP added46,096$4M0.2%2026-Q1
MARTINGALE ASSET MANAGEMENT L P added43,232$4M0.2%2026-Q1
CITIGROUP INC added40,528$4M0.1%2026-Q1
RITHOLTZ WEALTH MANAGEMENT added40,483$4M0.1%2026-Q1
NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed39,708$4M0.1%2026-Q1
Horizon Investments, LLC added38,454$3M0.1%2026-Q1
DENALI ADVISORS LLC added38,214$3M0.1%2026-Q1
ALLIANCEBERNSTEIN L.P. trimmed34,895$3M0.1%2026-Q1
PRICE T ROWE ASSOCIATES INC /MD/ added34,474$3M0.1%2026-Q1
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added33,853$3M0.1%2026-Q1
Point72 Asset Management, L.P. trimmed32,590$3M0.1%2026-Q1
GLOBEFLEX CAPITAL L P32,133$3M0.1%2026-Q1
TUDOR INVESTMENT CORP ET AL trimmed31,567$3M0.1%2026-Q1
BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed27,700$2M0.1%2026-Q1
FMR LLC trimmed27,174$2M0.1%2026-Q1
Proficio Capital Partners LLC new26,986$2M0.1%2026-Q1
HSBC HOLDINGS PLC added26,561$2M0.1%2026-Q1
DEUTSCHE BANK AG\ added26,772$2M0.1%2026-Q1
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC trimmed26,590$2M0.1%2026-Q1
Voleon Capital Management LP trimmed26,506$2M0.1%2026-Q1
CANADA LIFE ASSURANCE Co trimmed25,889$2M0.1%2026-Q1
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed25,898$2M0.1%2026-Q1
VANGUARD GROUP INC trimmed2,884,062$271M11.1%2025-Q4 stale
Diameter Capital Partners LP new350,000$20M0.8%2025-Q1 stale
LAKEWOOD CAPITAL MANAGEMENT, LP158,218$15M0.6%2025-Q4 stale
TWO SIGMA ADVISERS, LP trimmed140,200$13M0.5%2025-Q4 stale
GOLDENTREE ASSET MANAGEMENT LP new162,718$11M0.4%2025-Q2 stale
HENNESSY ADVISORS INC trimmed172,600$10M0.4%2025-Q1 stale
FJ Capital Management LLC added83,592$7M0.3%2025-Q3 stale
COMPASS ROSE ASSET MANAGEMENT, LP new125,000$7M0.3%2025-Q1 stale
Freestone Grove Partners LP trimmed99,600$7M0.3%2025-Q2 stale
Informed Momentum Co LLC trimmed46,268$4M0.2%2025-Q4 stale
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed57,780$4M0.2%2025-Q2 stale
NORGES BANK trimmed69,901$4M0.1%2025-Q1 stale
GROUP ONE TRADING LLC added36,156$3M0.1%2025-Q4 stale
Counterpoint Mutual Funds LLC added39,999$3M0.1%2025-Q2 stale
Quinn Opportunity Partners LLC new47,490$3M0.1%2025-Q1 stale
Weiss Asset Management LP new26,631$3M0.1%2025-Q4 stale
Interval Partners, LP trimmed26,427$2M0.1%2025-Q3 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