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Off-exchange data

COST Dark Pool Activity

Oct 29, 2026 · 3-session delay

$85.6MOff-exchange premium
16Dark pool prints
86KShares off-exchange
~$53MLargest single print

Costco Wholesale (COST) traded $85.6M across 16 dark pool prints on Oct 29, about 103% above its recent average. Block-size prints made up roughly 75% of the session, concentrated between $988 and $996.

Key dark pool levels

$99661K shares · $61M
$9908K shares · $7.7M
$9884K shares · $4.3M
$█,██████K shares · $██M
8 more levels · live in the app →

Block activity

3Block-size prints
$64.1MCombined block premium
75%Share of off-exchange premium
~$53MLargest block
TimeSizePricePremiumType
█:██ PM███,██0$█,███.██$██.█MBLOCK
█:██ PM███,██0$█,███.██$██.█MBLOCK
The print-by-print tape · live in the app →

Off-exchange premium: Oct 23 to Oct 29, 2026

How to read this: dark pools are private venues where institutions execute large trades away from public order books; the prints are reported through FINRA shortly after execution (the guide to how dark pool trading works covers the background). Prices where unusual volume accumulates are the reference prices traders watch when the market revisits them. Learn how Robinflow tracks dark pools →

What these terms mean: Dark pool print·Dark pool levels·Trade condition codes

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More COST data

Dealer positioningCOST GEXGamma by strike with call and put wallsOrder flowCOST Options FlowPremium totals, sweeps, and top strikesOverviewCOST Symbol OverviewEverything Robinflow tracks on COST

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