WDC Market Structure
Western Digital Corporation (WDC) operates in the Technology sector, specifically the Computer Hardware industry, with a market capitalization near $170.30B, listed on NASDAQ, employing roughly 40,000 people, carrying a beta of 2.16 to the broader market. Western Digital Corporation develops, manufactures, and sells data storage devices and solutions in the United States, China, Hong Kong, Europe, the Middle East, Africa, rest of Asia, and internationally. Led by Tiang Yew Tan, public since 1978-10-31.
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
- 2026-04-20
- Weekly OTC Shares
- 8.1M
- Weekly OTC Trades
- 155.5K
- 12-Week Total Shares
- 164.9M
- Avg Trade Size (12-Week)
- 82 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 WDC'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 Western Digital Corporation.
Learn how market structure is reported and how to read the data →
Frequently asked WDC market structure questions
- What is the current WDC off-exchange volume?
- For the week ending Apr 20, 2026, Western Digital Corporation (WDC) recorded 8.1M shares across 155.5K trades (average trade size 52 shares). The 12-week cumulative total is 164.9M shares.
- What does WDC 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 WDC 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.