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Short interest
How many shares are sold short in each stock, reported twice a month by FINRA.
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 ZYME
| Shares that brokers had failed to deliver and not yet delivered at the end of this settlement date, from the SEC. The figure is a running balance: all the shares that were still undelivered at the end of that settlement date, including fails carried over from earlier days. It is not the number of new fails that day, and the file does not say how old they are. The same fail is counted again on every day it stays open. The SEC says these numbers are not evidence of abusive or "naked" short selling, and are not necessarily the result of short selling. Fails have many causes, and most are cleared within days. A large balance in one stock is a reason to look closer, not a conclusion. | Source | ||||||
|---|---|---|---|---|---|---|---|
| Oct 15, 2026 | 5.58M | 5.29M | +5.4% | 1.28M | 4.4 | — | FINRA ↗ |
| Sep 30, 2026 | 5.29M | 4.94M | +7.1% | 953,928 | 5.5 | none listed | FINRA ↗ |
| Sep 15, 2026 | 4.94M | 4.72M | +4.5% | 619,914 | 8.0 | none listed | FINRA ↗ |
| Aug 31, 2026 | 4.72M | 4.54M | +4.1% | 827,575 | 5.7 | none listed | FINRA ↗ |
| Aug 14, 2026 | 4.54M | 4.11M | +10.5% | 533,925 | 8.5 | none listed | FINRA ↗ |
| Jul 31, 2026 | 4.11M | 4.10M | +0.1% | 376,796 | 10.9 | none listed | FINRA ↗ |
| Jul 15, 2026 | 4.10M | 4.36M | -6.0% | 542,279 | 7.6 | none listed | FINRA ↗ |
| Jun 30, 2026 | 4.36M | 4.49M | -2.7% | 704,780 | 6.2 | none listed | FINRA ↗ |
| Jun 15, 2026 | 4.49M | 4.53M | -0.9% | 804,667 | 5.6 | none listed | FINRA ↗ |
| May 29, 2026 | 4.53M | 4.47M | +1.3% | 594,680 | 7.6 | none listed | FINRA ↗ |
| May 15, 2026 | 4.47M | 4.65M | -3.8% | 673,335 | 6.6 | none listed | FINRA ↗ |
| Apr 30, 2026 | 4.65M | 4.65M | -0.1% | 553,518 | 8.4 | none listed | FINRA ↗ |
| Apr 15, 2026 | 4.65M | 4.46M | +4.3% | 664,924 | 7.0 | none listed | FINRA ↗ |
| Mar 31, 2026 | 4.46M | 4.08M | +9.4% | 553,578 | 8.1 | 590 | FINRA ↗ |
| Mar 13, 2026 | 4.08M | 4.14M | -1.4% | 969,195 | 4.2 | none listed | FINRA ↗ |
| Feb 27, 2026 | 4.14M | 3.97M | +4.1% | 457,960 | 9.0 | none listed | FINRA ↗ |
| Feb 13, 2026 | 3.97M | 3.78M | +5.2% | 550,233 | 7.2 | none listed | FINRA ↗ |
| Jan 30, 2026 | 3.78M | 3.82M | -1.2% | 642,258 | 5.9 | none listed | FINRA ↗ |
| Jan 15, 2026 | 3.82M | 3.60M | +6.1% | 1.28M | 3.0 | none listed | FINRA ↗ |
| Dec 31, 2025 | 3.60M | 3.94M | -8.5% | 559,387 | 6.4 | none listed | FINRA ↗ |
| Dec 15, 2025 | 3.94M | 5.61M | -29.8% | 693,921 | 5.7 | none listed | FINRA ↗ |
| Nov 28, 2025 | 5.61M | 8.54M | -34.3% | 2.88M | 1.9 | none listed | FINRA ↗ |
| Nov 14, 2025 | 8.54M | 7.53M | +13.4% | 1.07M | 8.0 | none listed | FINRA ↗ |
| Oct 31, 2025 | 7.53M | 7.05M | +6.9% | 996,465 | 7.6 | none listed | FINRA ↗ |
24 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 5:31 PM EST.
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