Not financial advice. This is history and education only. We make no buy or sell recommendations and no price predictions.
2021Arbitrum in 2021
1 key event this year.
Here is what happened to Arbitrum in 2021, in date order, with the daily close from our price data where it covers the date.
Our price data does not cover this year, so no chart or prices are shown.
Events in 2021
Arbitrum One opens Aug 31, 2021
Arbitrum One opened to the public on August 31, 2021 after a developer only period.
Updated
Sources
Facts written in our own words. Last checked Oct 14, 2026.