MASI Market Structure

Masimo Corporation (MASI) operates in the Healthcare sector, specifically the Medical - Devices industry, with a market capitalization near $9.42B, listed on NASDAQ, employing roughly 7,500 people, carrying a beta of 1.18 to the broader market. Masimo Corporation engages in the development, manufacture, and marketing of various patient monitoring technologies, and automation and connectivity solutions worldwide. Led by Catherine Szyman, public since 2007-08-08.

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

2026-06-08

Weekly OTC Shares

226.4K

Weekly OTC Trades

1.5K

12-Week Total Shares

6.3M

Avg Trade Size (12-Week)

153 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 MASI'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 Masimo Corporation.

Learn how market structure is reported and how to read the data →