Middlesex Water
MSEX
219 hedge funds and large institutions have $793M invested in Middlesex Water in 2026 Q1 according to their latest regulatory filings, with 37 funds opening new positions, 73 increasing their positions, 66 reducing their positions, and 14 closing their positions.
7,056% more call options, than puts
Call options by funds: $1.15M | Put options by funds: $16K
164% more first-time investments, than exits
New positions opened: 37 | Existing positions closed: 14
11% more repeat investments, than reductions
Existing positions increased: 73 | Existing positions reduced: 66
9% more funds holding
Funds holding: 201 → 219 (+18)
4% more capital invested
Capital invested by funds: $765M → $793M (+$28M)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
0.59% less ownership
Funds ownership: 81.7% → 81.1% (-0.59%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
M
Mirova
Paris,
France
|
+$10.3M |
| 2 |
Jane Street
New York
|
+$4.57M |
| 3 |
HF
HRT Financial
New York
|
+$3.56M |
| 4 |
Two Sigma Investments
New York
|
+$3.23M |
| 5 |
NI
Nuance Investments
Kansas City,
Missouri
|
+$3.01M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$23M |
| 2 |
Principal Financial Group
Des Moines,
Iowa
|
-$2.3M |
| 3 |
ACG
Aventail Capital Group
New York
|
-$2.29M |
| 4 |
American Century Companies
Kansas City,
Missouri
|
-$1.99M |
| 5 |
Goldman Sachs
New York
|
-$1.54M |
MSEX Hedge Fund Activity: Q1 2026 in Review
219 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Middlesex Water (MSEX) for Q1 2026, worth a combined $793M — up 3.7% from $765M a quarter earlier.
Buyers outnumbered sellers: 37 funds opened new MSEX positions and 14 closed out — a net gain of 23 holders — while 73 added to existing stakes and 66 trimmed.
The largest buyer was Mirova, opening a new position worth an estimated $10.3M. The largest seller was BlackRock, cutting an estimated $23M.
- 219 institutional investors held Middlesex Water (MSEX) as of Q1 2026, up from 201 in Q4 2025.
- Funds reported $793M of Middlesex Water stock for Q1 2026, up 3.7% quarter-over-quarter.
- 37 funds opened new Middlesex Water positions in Q1 2026 and 14 closed out, a net change of +23 holders.
- The largest Middlesex Water buyer in Q1 2026 was Mirova, an estimated $10.3M added.
- The largest Middlesex Water seller in Q1 2026 was BlackRock, an estimated $23M sold.
Based on aggregated 13F filings for Q1 2026.