Arcus is a decentralized perpetuals exchange and DeFi trading protocol founded by Antonio Juliano as Founder and CEO of dYdX Trading Inc. Arcus's Twitter Score is 374 out of 1000 (an Excellent rating) as of July 2026, ranking #712 (top 0.5%) among 388,884 tracked accounts.
Arcus has reported $1.5T in lifetime volume, $200M in open interest, more than 220 markets, and $12M in MegaVault TVL. The protocol is affiliated with dYdX Foundation, dYdX Grants, and dYdX Operations Trust, with open source software development carried out by dYdX Trading Inc. dba dYdX Labs. In February 2021, Arcus and StarkWare launched a Layer 2 protocol for cross-margined perpetuals. Arcus announced in June 2022 that it was building its fourth version using Tendermint and joining the Cosmos ecosystem, and in September 2023 the dYdX community voted to adopt DYDX as the Layer 1 token powering the dYdX Chain.
Arcus raised a $10M Series B round led by Three Arrows Capital and DeFiance Capital, followed by a $65M Series C round led by Paradigm. Three Arrows Capital, a former backer of Arcus, was ordered into liquidation by a British Virgin Islands court in June 2022. Additional backers include a16z, Polychain Capital, Wintermute, Electric Capital, and Delphi Digital.
Arcus has continued expanding its product offering: on December 11, 2025, Solana spot trading went live on the platform. On October 10, 2025, the dYdX Chain experienced temporary instability and downtime after market volatility triggered an unforeseen protocol edge case, with funds remaining secure and the chain resuming normal operation on October 11. Arcus has published 7,632 posts and has 307,381 followers as of July 2026. Arcus has been mentioned by 1,069 accounts a total of 3,803 times.
Arcus's portfolio includes L2BEAT.
Who follows Arcus on X?
The accounts that follow Arcus include 1,214 founders, 284 angel investors, 859 influencers and 108 VCs. Among them are Erik Voorhees, Laura Shin, Toly, Solana, Stani and Fred Ehrsam.