MSEX Market Structure
Middlesex Water Company (MSEX) operates in the Utilities sector, specifically the Regulated Water industry, with a market capitalization near $1.01B, listed on NASDAQ, employing roughly 395 people, carrying a beta of 0.73 to the broader market. Middlesex Water Company primarily delivers vital water and wastewater utility services, structured around two key business units. Led by Nadine Duchemin-Leslie, public since 1973-02-21.
Market structure data reveals where a stock trades across exchanges, dark pools, and alternative trading systems. Understanding off-exchange activity helps identify institutional trading patterns and liquidity dynamics.
- Latest Week Ending
- 2026-09-07
- Weekly OTC Shares
- 55.9K
- Weekly OTC Trades
- 1.3K
- 12-Week Total Shares
- 1.2M
- Avg Trade Size (12-Week)
- 49 shares
How Single-Name Off-Exchange Volume Affects Options
For single-name equities, persistent off-exchange volume concentrations can flag institutional positioning - large blocks arranged through ATS venues to avoid lit-market impact, or correlation-arbitrage flow from sector rotation. The flow doesn't directly move the lit-market price (it prints at the ATS) but it changes the inventory position of the institutional counterparty, which then drives subsequent lit-market flow. Compare the off-exchange volume series above with MSEX's gamma exposure and options volume history to see whether unusual dark-pool activity coincides with rebalancing in the options book.
Showing 12 weeks of off-exchange trading data for Middlesex Water Company.
Learn how market structure is reported and how to read the data →
Frequently asked MSEX market structure questions
- What is the current MSEX off-exchange volume?
- For the week ending Sep 7, 2026, Middlesex Water Company (MSEX) recorded 55.9K shares across 1.3K trades (average trade size 43 shares). The 12-week cumulative total is 1.2M shares.
- What does MSEX off-exchange volume mean for traders?
- Off-exchange volume on a single-name equity reflects institutional block trades arranged through alternative trading systems (ATS) for liquidity rather than information reasons. Persistent ATS volume on a name can signal large institutional repositioning; the lit-market price impact lags the off-exchange print by hours to days as the institutional counterparty hedges or unwinds.
- How is MSEX market-structure data sourced?
- Weekly off-exchange volume figures come from FINRA's OTC Transparency reporting, which captures trades executed through FINRA-member off-exchange venues including ATSs and member firm internalization desks. FINRA publishes the data with a two-week lag (current-week-minus-two-weeks) for ATS-specific volume and weekly aggregate volume; the totals here aggregate all member firm reporting. Trades cleared via the listed-exchange auction are NOT included; the figure reflects only the off-exchange portion of total volume.