MSEX · Middlesex Water Co · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 227 13F filersWho Holds MSEX
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 227 filers, like-for-like change +4.5%; actively managed books +6.3%; index-like books +2.7%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 28.0% | 113 | +11.6% |
| Exempt adviser | 0.1% | 1 | new |
| Adviser | 14.2% | 8 | -0.4% |
| Bank | 8.7% | 13 | +4.9% |
| Insurer | 0.8% | 2 | +2.0% |
| Broker-dealer | 0.1% | 1 | -8.8% |
| Benefit plan | 0.2% | 2 | +25.2% |
| Non-US | 0.6% | 5 | -0.2% |
| Holding company | 37.9% | 7 | +2.1% |
| Unknown | 9.5% | 75 | +1.8% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 49.0% | 32 | +2.7% |
| Systematic-like | 1.8% | 13 | +18.9% |
| Concentrated | 2.7% | 29 | -3.0% |
| Diversified active | 46.5% | 153 | +6.5% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 67.6% | 151 | +2.9% |
| Medium turnover | 17.7% | 39 | +7.4% |
| High turnover | 3.0% | 18 | -25.0% |
| Unknown | 11.7% | 19 | +23.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 11.8% | 24 | +22.9% |
| Medium horizon | 33.7% | 28 | +2.2% |
| Long horizon | 49.8% | 166 | +1.9% |
| Unknown | 4.7% | 9 | +11.0% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 4.6% | 44 | +86.6% |
| $1B to $10B | 4.6% | 61 | -5.1% |
| $10B to $100B | 5.9% | 61 | -8.6% |
| $100B or more | 84.9% | 61 | +3.6% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 4.5% | 66 | +51.0% |
| Pooled investment vehicles | 3.4% | 11 | -1.2% |
| Registered funds and BDCs | 17.1% | 14 | +2.9% |
| Pension and profit sharing plans | 0.0% | 2 | +21.2% |
| Insurance companies | 0.1% | 3 | +39.2% |
| Governments and sovereign funds | 0.8% | 3 | +14.9% |
| Other investment advisers | 0.4% | 6 | +226.3% |
| Other | 0.2% | 2 | +20.5% |
| Diversified | 1.5% | 6 | +52.4% |
| Unknown | 72.0% | 114 | +2.0% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 4.3% | 16 | +13.5% |
| Private equity funds | 0.2% | 6 | -8.4% |
| Venture capital funds | 0.0% | 1 | +107.4% |
| Real estate funds | 0.0% | 3 | +261.5% |
| Securitized asset funds | 0.3% | 1 | -24.9% |
| Other private funds | 3.1% | 9 | -0.1% |
| Mixed private funds | 0.2% | 1 | +23.3% |
| No private funds | 20.0% | 77 | +14.6% |
| Private funds, type not stated | 0.0% | 0 | — |
| Unknown | 71.9% | 113 | +1.9% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 94.0% | 195 | +4.7% |
| Outside the US | 6.0% | 32 | +1.9% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 2 holders with no observed 2026-03-31 13F and 3 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
227 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 34.5% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies MSEX's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | HTO H2o America | 4 |
| 2 | CWT California Water Service Group | 4 |
| 3 | WERN Werner Enterprises Inc | 3 |
| 4 | CPK Chesapeake Utilities Corp | 3 |
| 5 | AWR American States Water Co | 3 |
| 6 | GTES Gates Industrial Corp Ltd. | 3 |
| 7 | POR Portland General Electric Co /Or/ | 3 |
| 8 | MGNI Magnite, Inc. | 3 |
| 9 | WTRG Essential Utilities, Inc. | 4 |
| 10 | AWK American Water Works Company, Inc. | 5 |
Shareholder Targets
13F filers that own its peers but not MSEX, quarter ended Jun 30, 2026Found through its holder-overlap peers: HTO, CWT, WERN, CPK, AWR, GTES, POR, MGNI, WTRG, AWK, IEX, XYL, ATO, ZBH, WY, XEL, DG, DHR, ED, DLR. 3,461 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $8,474,140,393 15 held | DHR, AWK, ATO |
| 2 | NORGES BANK Non-US, Index-like | $7,929,856,835 13 held | DLR, DHR, ED |
| 3 | COHEN & STEERS, INC. Adviser, Diversified active | $5,977,708,998 7 held | DLR, WY, XEL |
| 4 | Capital International Investors Adviser, Diversified active | $5,364,611,251 4 held | DHR, ATO, ZBH |
| 5 | Capital Research Global Investors Adviser, Diversified active | $4,884,957,500 5 held | XEL, DHR, ATO |
| 6 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser, Diversified active | $2,735,388,945 7 held | XEL, DHR, ATO |
| 7 | GQG Partners LLC Registered adviser, Diversified active | $2,265,601,530 3 held | AWK, XEL, ATO |
| 8 | Blackstone Inc. Adviser, Concentrated | $2,212,568,167 4 held | DLR, DG, AWK |
| 9 | Dodge & Cox Registered adviser, Diversified active | $2,125,859,224 2 held | ZBH, DHR |
| 10 | CANADA PENSION PLAN INVESTMENT BOARD Non-US, Diversified active | $1,960,130,706 15 held | DLR, DHR, ED |
Fund Ownership of MSEX by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 27.22% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 5.13% | 966,836 |
| Index ETFs | 22.09% | 4,162,426 |
| Active ETFs | 0.84% | 159,110 |
| Active funds | 14.89% | 2,806,751 |
| Unclassified | 0.16% | 30,475 |
| All registered funds | 43.12% | 8,125,598 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $176,031,325 | 19.90% | 3,134,461 | Shares | 2026-08-07 | |
| Mega T. Rowe Price Investment Management, Inc. Adviser | $98,086,809 | 11.09% | 1,746,560 | Shares | 2026-08-14 | |
| Mega NEUBERGER BERMAN GROUP LLC Holding company | $90,084,402 | 10.19% | 1,604,067 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY Holding company | $61,871,693 | 7.00% | 1,101,704 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $45,058,459 | 5.09% | 802,323 | Shares | 2026-08-13 | |
| Mega STATE STREET CORP Bank | $44,829,158 | 5.07% | 798,240 | Shares | 2026-09-22 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $28,855,513 | 3.26% | 513,809 | Shares | 2026-08-13 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $28,111,168 | 3.18% | 500,555 | Shares | 2026-08-12 | |
| Mega Legal & General Group Plc | $24,570,223 | 2.78% | 437,504 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $19,567,827 | 2.21% | 348,430 | Shares | 2026-08-11 | |
| Mega Invesco Ltd. Adviser | $15,736,704 | 1.78% | 280,212 | Shares | 2026-08-14 | |
| Small Ledgewood Wealth Advisors, LLC Registered adviser | $12,977,067 | 1.47% | 244,989 | Shares | 2026-10-09 | |
| Mega NORTHERN TRUST CORP Bank | $12,509,468 | 1.41% | 222,747 | Shares | 2026-08-13 | |
| Small TSP Capital Management Group, LLC Registered adviser | $11,737,622 | 1.33% | 221,590 | Shares | 2026-10-15 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $10,875,552 | 1.23% | 193,653 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $10,053,817 | 1.14% | 179,021 | Shares | 2026-08-06 | |
| Mid Zimmer Partners, LP Registered adviser | $9,934,872 | 1.12% | 176,903 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $9,154,192 | 1.04% | 163,002 | Shares | 2026-08-14 | |
| Mid MIROVA | $8,933,202 | 1.01% | 159,067 | Shares | 2026-08-13 | |
| Large FIRST MANHATTAN CO. LLC. Adviser | $7,953,603 | 0.90% | 141,624 | Shares | 2026-08-14 | |
| Large ProShare Advisors LLC Registered adviser | $7,360,666 | 0.83% | 131,066 | Shares | 2026-08-11 | |
| Mega Jupiter Topco LLC | $7,264,014 | 0.82% | 129,345 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $6,913,464 | 0.78% | 123,103 | Shares | 2026-08-13 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $6,223,258 | 0.70% | 110,813 | Shares | 2026-08-13 | |
| Mid CRAMER ROSENTHAL MCGLYNN LLC | $6,076,062 | 0.69% | 108,192 | Shares | 2026-08-13 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $6,038,884 | 0.68% | 107,530 | Shares | 2026-08-04 | |
| Small NUANCE INVESTMENTS, LLC Registered adviser | $4,820,212 | 0.55% | 85,830 | Shares | 2026-08-07 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $4,757,200 | 0.54% | 84,708 | Shares | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $4,696,153 | 0.53% | 83,621 | Shares | 2026-08-14 | |
| Large Public Sector Pension Investment Board Non-US | $3,591,768 | 0.41% | 63,956 | Shares | 2026-08-13 | |
| Small DEAN INVESTMENT ASSOCIATES, LLC Registered adviser | $3,366,848 | 0.38% | 59,951 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $3,206,791 | 0.36% | 57,101 | Shares | 2026-08-11 | |
| Mid Penn Capital Management Company, LLC Registered adviser | $3,049,937 | 0.34% | 54,308 | Shares | 2026-07-30 | |
| Large Quantinno Capital Management LP Registered adviser | $2,872,359 | 0.32% | 51,146 | Shares | 2026-08-13 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $2,493,616 | 0.28% | 44,402 | Shares | 2026-08-12 | |
| Small Dean Capital Management Registered adviser | $2,445,374 | 0.28% | 43,543 | Shares | 2026-08-14 | |
| Large EXCHANGE TRADED CONCEPTS, LLC Registered adviser | $2,409,937 | 0.27% | 42,912 | Shares | 2026-08-11 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $2,340,690 | 0.26% | 41,679 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $2,270,941 | 0.26% | 40,437 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $2,219,049 | 0.25% | 39,513 | Shares | 2026-08-13 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $2,102,405 | 0.24% | 37,436 | Shares | 2026-08-14 | |
| Mega Swiss National Bank | $2,092,633 | 0.24% | 37,262 | Shares | 2026-08-11 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $2,075,841 | 0.23% | 36,963 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $2,032,711 | 0.23% | 36,195 | Shares | 2026-08-14 | |
| Large Baird Financial Group, Inc. | $1,677,948 | 0.19% | 29,878 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $1,668,850 | 0.19% | 29,716 | Shares | 2026-09-02 | |
| Mega TD Asset Management Inc | $1,630,661 | 0.18% | 29,036 | Shares | 2026-08-04 | |
| Small NORTHSTAR ASSET MANAGEMENT INC Registered adviser | $1,570,626 | 0.18% | 27,967 | Shares | 2026-07-28 | |
| Mid OPPENHEIMER & CO INC | $1,555,182 | 0.18% | 27,692 | Shares | 2026-08-03 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $1,456,397 | 0.16% | 25,933 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $1,434,325 | 0.16% | 25,540 | Shares | 2026-08-12 | |
| Large HighTower Advisors, LLC Registered adviser | $1,371,314 | 0.16% | 24,418 | Shares | 2026-08-05 | |
| Mega SG Americas Securities, LLC | $1,307,180 | 0.15% | 23,276 | Shares | 2026-08-07 | |
| Mid Legato Capital Management LLC Registered adviser | $1,275,112 | 0.14% | 22,705 | Shares | 2026-08-06 | |
| Mega LPL Financial LLC Broker-dealer | $1,269,496 | 0.14% | 22,605 | Shares | 2026-08-07 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $1,217,604 | 0.14% | 21,681 | Shares | 2026-08-24 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $1,201,824 | 0.14% | 21,400 | Call | 2026-09-02 | |
| Mega RAYMOND JAMES FINANCIAL INC | $1,191,265 | 0.13% | 21,212 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Non-US | $1,172,395 | 0.13% | 20,876 | Shares | 2026-08-07 | |
| Large Assenagon Asset Management S.A. | $1,107,337 | 0.13% | 20,905 | Shares | 2026-10-15 | |
| Large GABELLI FUNDS LLC Registered adviser | $1,086,696 | 0.12% | 19,350 | Shares | 2026-08-12 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $1,082,651 | 0.12% | 19,278 | Shares | 2026-08-14 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $1,060,525 | 0.12% | 18,884 | Shares | 2026-08-12 | |
| Large Corient Private Wealth LLC Registered adviser | $987,910 | 0.11% | 17,591 | Shares | 2026-08-27 | |
| Large CANADA LIFE ASSURANCE Co | $975,499 | 0.11% | 17,370 | Shares | 2026-08-13 | |
| Small Odyssean, LLC Registered adviser | $967,468 | 0.11% | 17,227 | Shares | 2026-08-14 | |
| Large Private Advisor Group, LLC Registered adviser | $913,947 | 0.10% | 16,274 | Shares | 2026-07-27 | |
| Mega PNC FINANCIAL SERVICES GROUP, INC. Bank | $908,555 | 0.10% | 16,178 | Shares | 2026-08-07 | |
| Mega AMERICAN CENTURY COMPANIES INC | $882,610 | 0.10% | 15,716 | Shares | 2026-08-12 | |
| Mid Magellan Asset Management Ltd Registered adviser | $870,648 | 0.10% | 15,503 | Shares | 2026-08-13 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $857,338 | 0.10% | 15,266 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $831,168 | 0.09% | 14,800 | Call | 2026-08-14 | |
| Large STOREBRAND ASSET MANAGEMENT AS | $826,394 | 0.09% | 14,715 | Shares | 2026-08-12 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $783,151 | 0.09% | 13,945 | Shares | 2026-08-14 | |
| Mid CenterBook Partners LP Registered adviser | $765,966 | 0.09% | 13,639 | Shares | 2026-08-11 | |
| Mega FRANKLIN RESOURCES INC Adviser | $739,570 | 0.08% | 13,169 | Shares | 2026-08-13 | |
| Large Thrivent Financial for Lutherans Registered adviser | $686,836 | 0.08% | 12,230 | Shares | 2026-08-14 | |
| Mid Inspire Investing, LLC Registered adviser | $673,526 | 0.08% | 11,993 | Shares | 2026-08-12 | |
| Mega Russell Investments Group, Ltd. | $671,559 | 0.08% | 11,958 | Shares | 2026-08-06 | |
| Large Mariner, LLC Registered adviser | $658,981 | 0.07% | 11,734 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $634,608 | 0.07% | 11,300 | Call | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $631,462 | 0.07% | 11,244 | Shares | 2026-08-03 | |
| Large Brevan Howard Capital Management LP Exempt adviser | $629,104 | 0.07% | 11,202 | Shares | 2026-08-14 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $613,660 | 0.07% | 10,927 | Shares | 2026-08-13 | |
| Large MetLife Investment Management, LLC Registered adviser | $609,672 | 0.07% | 10,856 | Shares | 2026-08-14 | |
| Mid Main Street Financial Solutions, LLC Registered adviser | $594,172 | 0.07% | 10,580 | Shares | 2026-08-07 | |
| Large Tidal Investments LLC Registered adviser | $590,522 | 0.07% | 10,515 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $567,216 | 0.06% | 10,100 | Put | 2026-08-14 | |
| Mid Atom Investors LP Registered adviser | $547,896 | 0.06% | 9,756 | Shares | 2026-08-14 | |
| Large COMMONWEALTH EQUITY SERVICES, LLC Registered adviser | $524,759 | 0.06% | 9,344 | Shares | 2026-07-29 | |
| Large Daiwa Securities Group Inc. | $517,065 | 0.06% | 9,207 | Shares | 2026-07-31 | |
| Mid Illinois Municipal Retirement Fund | $514,425 | 0.06% | 9,160 | Shares | 2026-08-12 | |
| Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM | $506,057 | 0.06% | 9,011 | Shares | 2026-07-23 | |
| Mid Parcion Private Wealth LLC Registered adviser | $474,888 | 0.05% | 8,456 | Shares | 2026-07-27 | |
| Mega Amundi Holding company | $464,555 | 0.05% | 8,272 | Shares | 2026-08-11 | |
| Mid XTX Topco Ltd | $436,756 | 0.05% | 7,777 | Shares | 2026-08-14 | |
| Mid Louisiana State Employees Retirement System | $423,760 | 0.05% | 8,000 | Shares | 2026-10-20 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $418,279 | 0.05% | 7,448 | Shares | 2026-07-29 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $404,183 | 0.05% | 7,197 | Shares | 2026-08-13 | |
| Large Cerity Partners LLC Registered adviser | $391,378 | 0.04% | 6,969 | Shares | 2026-08-14 |
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