About this data

What it is: Short interest is the number of shares investors have sold short and not yet bought back. FINRA, which oversees US brokers, publishes it for every US-listed stock twice a month.
Who files it: Brokers report their customers' short positions to FINRA, which publishes the totals.
How current: Positions are counted twice a month, and FINRA publishes them about a week later, so the latest report never includes today's short selling.
Worth knowing: A high number can reflect bets that the price will fall, or hedges against other positions. Days to cover is shares short divided by average daily volume: roughly how many days of normal trading it would take to buy them all back.
Not to be confused with: Fails to deliver: shares that were sold but not delivered by the settlement date, from the SEC. The tables on this page have a Fails outstanding column with the balance on each report date.

All of this comes from public filings.

Source and freshness · Information, not investment advice (disclaimer).

Source: FINRA

Total shares reported short, last 8 reports

Most shorted in the latest report

Showing: ticker PLYX

17 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 4:54 PM EST.

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