What Poloniex is
Founded in January 2014 by Tristan D'Agosta, Poloniex was for years one of the world's leading altcoin exchanges. Its corporate history is eventful: acquired by Circle in February 2018, it was sold in 2019 to a consortium of investors linked to Justin Sun (founder of TRON), who remains its controlling owner; it has since left the US market and operates from an offshore jurisdiction. Today it is still active, with hundreds of cryptocurrencies listed, but with far less market weight than in its golden years and strong integration with the TRON/HTX ecosystem (Verified: September 2026). Founder Tristan D'Agosta has not been involved in management since the 2018 sale to Circle; operations today rest with offshore entities, historically linked to the Seychelles.
Regulation and licences
(Verified: September 2026)
- MiCA: NO — Poloniex does not appear in the ESMA register of authorised CASPs and there is no public application in progress. Since 01/07/2026 it cannot legally offer its services to EU clients.
- United States: it stopped serving US clients in 2019; in 2021 (under the previous management) it settled with the SEC for around 10 million dollars over operating as an unregistered exchange.
- No authorisation in EU jurisdictions; current operations are aimed at non-EU and non-US markets.
Security
Two major incidents, recounted at length because they are part of the exchange's history:
- 2014: in its first months it lost part of the bitcoin in its custody in a hack; users were reimbursed.
- November 2023: a hack of more than 100 million dollars (estimates between 114 and 126 million according to PeckShield and SlowMist) on the hot wallets, attributed by several analysts to the Lazarus group. Justin Sun declared the platform "financially healthy" and promised full reimbursement; deposits and withdrawals were progressively restored in the following weeks, starting with the TRON network.
The exchange remains operational, but the combination of a significant hack, offshore ownership and the absence of Western licences is the picture a reader needs to know.
Alternatives
For those operating from the EU:
- Kraken — MiCA via Ireland, a track record with no breaches of customer funds
- OKX — MiCA via Malta
- Bitstamp — a long-standing exchange active in Europe
FAQ
Is Poloniex legal in the EU? No, not any more: without a MiCA licence, since 1 July 2026 it cannot legally offer services to EU clients (Verified: September 2026).
Who owns Poloniex today? Since 2019 it has been held by a group of investors led by Justin Sun, founder of TRON; the original founder Tristan D'Agosta and Circle have been out for years. There is no public CEO in office (Verified: September 2026).
Were the funds stolen in 2023 returned to users? The ownership promised full reimbursement and services were restored; a public and independent account of the repayments is not available.
Verified sources
- https://www.theblock.co/post/262563/justin-suns-crypto-exchange-poloniex-seemingly-hit-by-
- https://decrypt.co/205465/justin-sun-owned-crypto-exchange-poloniex-hacked-60m
- https://support.poloniex.com/hc/en-us/articles/19536894469911-Poloniex-Resumes-Deposit-and
- https://casptracker.eu/
TEAM MEMBERS
LEADERSHIP
HQ OF THE POLONIESX
Boston, Massachusetts, United States
CONTACTS OF POLONIEX
All images, branding and wording are copyright Poloniex. All content on this page is used for informational purposes only. Spaziocrypto has no affiliation or relationship with the company mentioned on this page.
