Federal Data Hub › FINRA Short Interest · JSON

Fastly, Inc. Class A Common St (FSLY)

Short interest · settlement 2026-05-29

3.24 days to cover

Shares short

19,665,563

Prior settlement

21,261,305

Change

-7.51%

Avg daily volume

6,067,221

Exchange

NNM

About this data

FINRA collects short interest (shares sold short and not yet bought back) twice a month and publishes it by security. Days to cover (short shares ÷ average daily volume) estimates how many days of normal trading it would take short sellers to close their positions — a high value is a classic short-squeeze setup. This is true short interest, distinct from daily short-sale volume (which includes market-maker hedging). See also this security's fails-to-deliver.

Source: FINRA Equity Short Interest. License: CC0 1.0.