The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query MSEX owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MSEX"
Use Arkolith to show who owns MSEX, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $157.0M | 3.0M | ▼−13% Reduced · −437K sh | Q1 2026 | |
| 2 | Neuberger Berman Group LLC | $80.7M | 1.5M | ▲+1.7% Added · +26K sh | Q1 2026 | |
| 3 | VANGUARD GROUP INC | $70.5M | 1.4M | ▲+1.8% Added · +25K sh | Q4 2025 | |
| 4 | MORGAN STANLEY | $57.7M | 1.1M | ▲+3.8% Added · +41K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $43.1M | 828K | ▲New +828K sh | Q1 2026 | |
| 6 | STATE STREET CORP | $38.7M | 744K | ▲+1.9% Added · +14K sh | Q1 2026 | |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | $25.4M | 488K | ▲New +488K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $24.5M | 470K | ▲+1.2% Added · +5K sh | Q1 2026 | |
| 9 | Legal & General Group Plc | $21.1M | 406K | ▲+4.5% Added · +17K sh | Q1 2026 | |
| 10 | DIMENSIONAL FUND ADVISORS LP | $18.0M | 346K | ▲+0.9% Added · +3K sh | Q1 2026 | |
| 11 | NORTHERN TRUST CORP | $10.3M | 198K | ▼−0.1% Reduced · −252 sh | Q1 2026 | |
| 12 | MIROVA | $10.2M | 196K | ▲New +196K sh | Q1 2026 | |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $10.0M | 192K | ▼−9.0% Reduced · −19K sh | Q1 2026 | |
| 14 | Bank of New York Mellon Corp | $9.2M | 178K | ▼−1.8% Reduced · −3K sh | Q1 2026 | |
| 15 | Zimmer Partners, LP | $9.2M | 177K | ▼−3.7% Reduced · −7K sh | Q1 2026 | |
| 16 | RENAISSANCE TECHNOLOGIES LLC | $7.7M | 147K | ▲+14% Added · +18K sh | Q1 2026 | |
| 17 | FIRST MANHATTAN CO. LLC. | $7.5M | 144K | ▼−2.3% Reduced · −3K sh | Q1 2026 | |
| 18 | GOLDMAN SACHS GROUP INC | $6.8M | 130K | ▼−18% Reduced · −29K sh | Q1 2026 | |
| 19 | VANGUARD FIDUCIARY TRUST CO | $6.2M | 119K | ▲New +119K sh | Q1 2026 | |
| 20 | ProShare Advisors LLC | $6.2M | 119K | ▼−0.1% Reduced · −176 sh | Q1 2026 | |
| 21 | PRINCIPAL FINANCIAL GROUP INC | $5.5M | 105K | ▼−29% Reduced · −44K sh | Q1 2026 | |
| 22 | JANE STREET GROUP, LLC | $4.5M | 87K | ▲Added Added · +87K sh | Q1 2026 | |
| 23 | BANK OF AMERICA CORP /DE/ | $3.6M | 69K | ▲+11% Added · +7K sh | Q1 2026 | |
| 24 | PUBLIC SECTOR PENSION INVESTMENT BOARD | $3.4M | 66K | ▲+3.4% Added · +2K sh | Q1 2026 | |
| 25 | TWO SIGMA INVESTMENTS, LP | $3.4M | 66K | ▲16× Added · +61K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Mar 4, 2026 | REINHARD WALTER G | Director | Sell (S) | 300 | $17K |
| Mar 3, 2026 | Duchemin-Leslie Nadine | President, CEO | Other (J) | 5K | $253K |
| Mar 3, 2026 | Duchemin-Leslie Nadine | President, CEO | Tax withholding (F) | 2K | $127K |
| Mar 1, 2026 | Duchemin-Leslie Nadine | President, CEO | Grant (A) | 5K | $250K |
| Feb 27, 2026 | HOGLUND ROBERT N | Director | Buy (P) | 2K | $109K |
| Feb 25, 2026 | Capko Robert John | PAO & Controller | Sell (S) | 134 | $7K |
| Nov 18, 2025 | Ginegaw Lorrie Beth | VP-HR | Sell (S) | 650 | $33K |
| Jun 15, 2025 | Bershad Joshua | Director | Other (J) | 213K | $0 |
| May 28, 2025 | REINHARD WALTER G | Director | Sell (S) | 702 | $40K |
| Apr 1, 2025 | REINHARD WALTER G | Director | Grant (A) | 702 | $45K |
| Apr 1, 2025 | Zerhouni Mohammed G. | SVP, CFO and Treasurer | Grant (A) | 3K | $200K |
| Apr 1, 2025 | Duchemin-Leslie Nadine | President, CEO | Grant (A) | 7K | $428K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 60 funds | $31.4B |
| AMAZON.COM INCAMZN | 59 funds | $23.1B |
| NVIDIA CORPNVDA | 58 funds | $43.0B |
| ALPHABET INC-CL AGOOGL | 58 funds | $20.3B |
| ELI LILLY & COLLY | 58 funds | $7.9B |
| MASTERCARD INC - AMA | 58 funds | $5.6B |
| PROCTER & GAMBLE CO/THEPG | 58 funds | $3.8B |
| THERMO FISHER SCIENTIFIC INCTMO | 58 funds | $2.9B |
| BOOKING HOLDINGS INCBKNG | 58 funds | $2.5B |
| NEXTERA ENERGY INCNEE | 58 funds | $2.3B |
| STRYKER CORPSYK | 58 funds | $1.2B |
| BROADCOM INCAVGO | 57 funds | $16.8B |
Ranked by how many of MSEX's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MSEX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.