Middlesex Water MSEX Institutional Ownership

Updated Oct 11, 2026

Middlesex Water Co (NASDAQ:MSEX) appeared in the 13F filings of 227 institutional investors for the quarter ended June 30, 2026.

• These investors held 83.31% of Middlesex Water's outstanding shares at the end of Q2 2026, up from 80.92% in Q1 2026.
• Total shares held in Middlesex Water rose 4.43% versus Q1 2026, while the number of holders rose 6.07% versus Q2 2025.
• Of the 227 holders, 121 added to their positions, 55 reduced their stakes and 51 left their positions unchanged in Q2 2026.
• In total, institutional investors held 15.7Mn shares of Middlesex Water at the end of Q2 2026, up 665.22K from the prior quarter and up 2.67Mn from a year earlier.
• BlackRock, Inc. was the top holder of Middlesex Water as of June 30, 2026, with 3.13Mn shares, or 16.63% of shares outstanding.
• The biggest increases in MSEX positions during Q2 2026 came from BlackRock, Inc. (+117.86K shares), Two Sigma Investments, LP (+97.48K shares), AQR Capital Management LLC (+66.69K shares), State Street Corp (+54.18K shares) and Neuberger Berman Group LLC (+54.16K shares).
• The biggest cuts to MSEX positions during Q2 2026 came from Jane Street Group, LLC (-82.18K shares), Goldman Sachs Group Inc (-45.12K shares), Mirova (-36.93K shares), Renaissance Technologies LLC (-36.2K shares) and Bank of America Corp (-28.88K shares).
• Middlesex Water's 10 largest institutional shareholders as of Q2 2026 were BlackRock, Inc. (3.13Mn shares), T. Rowe Price Investment Management, Inc. (1.75Mn shares), Neuberger Berman Group LLC (1.6Mn shares), Morgan Stanley (1.1Mn shares), Vanguard Capital Management LLC (802.32K shares), State Street Corp (798.24K shares), Vanguard Portfolio Management LLC (513.81K shares), Geode Capital Management, LLC (500.56K shares), Legal & General Group PLC (437.5K shares) and Dimensional Fund Advisors LP (348.43K shares), per Business Quant data.