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.
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).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 2,847,850 | $251M | 10.3% | 2026-Q1 |
| Rubric Capital Management LP added | 2,154,504 | $190M | 7.8% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,149,647 | $189M | 7.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 1,717,862 | $151M | 6.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,226,459 | $108M | 4.4% | 2026-Q1 |
| STATE STREET CORP trimmed | 1,099,091 | $97M | 4.0% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 823,582 | $73M | 3.0% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 813,320 | $72M | 2.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 754,127 | $66M | 2.7% | 2026-Q1 |
| DG Capital Management, LLC trimmed | 594,377 | $52M | 2.1% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 574,897 | $51M | 2.1% | 2026-Q1 |
| Invesco Ltd. added | 543,757 | $48M | 2.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 378,172 | $33M | 1.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 357,279 | $31M | 1.3% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 352,849 | $31M | 1.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 348,499 | $31M | 1.3% | 2026-Q1 |
| UBS Group AG added | 307,171 | $27M | 1.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 289,047 | $25M | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 269,738 | $24M | 1.0% | 2026-Q1 |
| Philosophy Capital Management LLC added | 257,296 | $23M | 0.9% | 2026-Q1 |
| Nuveen, LLC trimmed | 255,495 | $23M | 0.9% | 2026-Q1 |
| WESTWOOD HOLDINGS GROUP INC trimmed | 251,025 | $22M | 0.9% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 243,500 | $21M | 0.9% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 217,713 | $19M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 193,129 | $17M | 0.7% | 2026-Q1 |
| Park West Asset Management LLC trimmed | 193,006 | $17M | 0.7% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 189,128 | $17M | 0.7% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 178,064 | $16M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 172,423 | $15M | 0.6% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 170,213 | $15M | 0.6% | 2026-Q1 |
| Baird Financial Group, Inc. trimmed | 145,640 | $13M | 0.5% | 2026-Q1 |
| SEI INVESTMENTS CO trimmed | 141,647 | $12M | 0.5% | 2026-Q1 |
| MARSHALL WACE, LLP added | 136,647 | $12M | 0.5% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 133,703 | $12M | 0.5% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 119,067 | $10M | 0.4% | 2026-Q1 |
| Allianz Asset Management GmbH added | 113,592 | $10M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 110,326 | $10M | 0.4% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 110,185 | $10M | 0.4% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 107,700 | $9M | 0.4% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 104,658 | $9M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board added | 95,134 | $8M | 0.3% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 85,653 | $8M | 0.3% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 85,307 | $8M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 83,486 | $7M | 0.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 82,385 | $7M | 0.3% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 81,988 | $7M | 0.3% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 80,077 | $7M | 0.3% | 2026-Q1 |
| Aptus Capital Advisors, LLC added | 79,715 | $7M | 0.3% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 74,938 | $7M | 0.3% | 2026-Q1 |
| PEAK6 LLC added | 74,346 | $7M | 0.3% | 2026-Q1 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC added | 74,018 | $7M | 0.3% | 2026-Q1 |
| Legal & General Group Plc trimmed | 73,184 | $6M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 71,477 | $6M | 0.3% | 2026-Q1 |
| Candriam S.C.A. added | 66,774 | $6M | 0.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 62,181 | $5M | 0.2% | 2026-Q1 |
| IEQ CAPITAL, LLC trimmed | 60,497 | $5M | 0.2% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 59,962 | $5M | 0.2% | 2026-Q1 |
| LSV ASSET MANAGEMENT | 55,700 | $5M | 0.2% | 2026-Q1 |
| Swiss National Bank | 54,700 | $5M | 0.2% | 2026-Q1 |
| Trexquant Investment LP trimmed | 52,758 | $5M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 48,890 | $4M | 0.2% | 2026-Q1 |
| Engineers Gate Manager LP added | 46,096 | $4M | 0.2% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P added | 43,232 | $4M | 0.2% | 2026-Q1 |
| CITIGROUP INC added | 40,528 | $4M | 0.1% | 2026-Q1 |
| RITHOLTZ WEALTH MANAGEMENT added | 40,483 | $4M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 39,708 | $4M | 0.1% | 2026-Q1 |
| Horizon Investments, LLC added | 38,454 | $3M | 0.1% | 2026-Q1 |
| DENALI ADVISORS LLC added | 38,214 | $3M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 34,895 | $3M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 34,474 | $3M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 33,853 | $3M | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 32,590 | $3M | 0.1% | 2026-Q1 |
| GLOBEFLEX CAPITAL L P | 32,133 | $3M | 0.1% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 31,567 | $3M | 0.1% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 27,700 | $2M | 0.1% | 2026-Q1 |
| FMR LLC trimmed | 27,174 | $2M | 0.1% | 2026-Q1 |
| Proficio Capital Partners LLC new | 26,986 | $2M | 0.1% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 26,561 | $2M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 26,772 | $2M | 0.1% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC trimmed | 26,590 | $2M | 0.1% | 2026-Q1 |
| Voleon Capital Management LP trimmed | 26,506 | $2M | 0.1% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co trimmed | 25,889 | $2M | 0.1% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 25,898 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 2,884,062 | $271M | 11.1% | 2025-Q4 stale |
| Diameter Capital Partners LP new | 350,000 | $20M | 0.8% | 2025-Q1 stale |
| LAKEWOOD CAPITAL MANAGEMENT, LP | 158,218 | $15M | 0.6% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP trimmed | 140,200 | $13M | 0.5% | 2025-Q4 stale |
| GOLDENTREE ASSET MANAGEMENT LP new | 162,718 | $11M | 0.4% | 2025-Q2 stale |
| HENNESSY ADVISORS INC trimmed | 172,600 | $10M | 0.4% | 2025-Q1 stale |
| FJ Capital Management LLC added | 83,592 | $7M | 0.3% | 2025-Q3 stale |
| COMPASS ROSE ASSET MANAGEMENT, LP new | 125,000 | $7M | 0.3% | 2025-Q1 stale |
| Freestone Grove Partners LP trimmed | 99,600 | $7M | 0.3% | 2025-Q2 stale |
| Informed Momentum Co LLC trimmed | 46,268 | $4M | 0.2% | 2025-Q4 stale |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 57,780 | $4M | 0.2% | 2025-Q2 stale |
| NORGES BANK trimmed | 69,901 | $4M | 0.1% | 2025-Q1 stale |
| GROUP ONE TRADING LLC added | 36,156 | $3M | 0.1% | 2025-Q4 stale |
| Counterpoint Mutual Funds LLC added | 39,999 | $3M | 0.1% | 2025-Q2 stale |
| Quinn Opportunity Partners LLC new | 47,490 | $3M | 0.1% | 2025-Q1 stale |
| Weiss Asset Management LP new | 26,631 | $3M | 0.1% | 2025-Q4 stale |
| Interval Partners, LP trimmed | 26,427 | $2M | 0.1% | 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.
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.