Arbitrum (ARB) is the governance token of Arbitrum One, an Ethereum Layer-2 optimistic rollup that scales Ethereum by executing transactions off-chain and settling proofs back to Ethereum mainnet. Its canonical contract resides on Arbitrum One at 0x912CE59144191C1204E64559FE8253a0e49E6548, deployed March 16, 2023. ARB is also represented on Ethereum mainnet and on Arbitrum Nova, a separate Arbitrum chain. As of 2026-08-31, ARB trades at approximately $0.0858.
Arbitrum differentiates itself through Nitro, Stylus (Rust and C/C++ smart contracts alongside Solidity), and BoLD, a permissionless fraud-proof validation system now live in production. Timeboost, a priority-fee auction mechanism, captures MEV-related value and has returned more than $6 million to the Arbitrum DAO treasury in its first year. As of mid-2026, the Arbitrum ecosystem has processed over 2.1 billion cumulative transactions and holds roughly $20 billion in total value locked, positioning it among the leading Ethereum Layer-2 networks by usage.
ARB is a governance token. Holders vote, either directly or by delegating voting power, on Arbitrum DAO proposals covering protocol upgrades, treasury fund allocation, Security Council elections, and parameter changes affecting Arbitrum One and Arbitrum Nova. Voting weight is proportional to the amount of ARB held or delegated.
ARB has a fixed maximum supply of 10 billion tokens, with no additional minting mechanism. Circulating supply is 6,678,075,931 ARB as of 2026-08-31.
Supply inflation is currently low; remaining unlocks stem from vesting rather than new issuance.
ARB launched via airdrop, announced March 16, 2023, with distribution to eligible wallets on March 23, 2023. Eligibility was based on a points system measuring network activity through a March 1, 2023 cutoff.
At the company level, Offchain Labs raised a $3.7 million seed round led by Pantera Capital (April 2019), a $20 million Series A (April 2021), and a $120 million Series B (2021) led by Lightspeed Venture Partners, valuing the company at $1.2 billion.
Arbitrum One is an optimistic rollup that executes transactions off-chain and posts transaction data and proofs to Ethereum mainnet, inheriting Ethereum's security and consensus guarantees. Validity is enforced through fraud proofs; BoLD, Arbitrum's permissionless validation protocol, is now live, allowing any party to challenge invalid state assertions rather than relying on a permissioned validator set.
Arbitrum's underlying technology was built by Offchain Labs, founded in 2018 by Ed Felten, Steven Goldfeder, and Harry Kalodner. Felten is a Princeton computer science professor and former U.S. Deputy Chief Technology Officer, Goldfeder is co-founder and CEO, and all three have backgrounds in Princeton academic cryptography research. Key institutional backers across Offchain Labs' funding rounds include Pantera Capital, Lightspeed Venture Partners, Polychain Capital, Alameda Research, Mark Cuban, Ribbit Capital, and Redpoint Ventures.
Offchain Labs, Inc., the original for-profit developer of the Arbitrum technology stack, and the Arbitrum Foundation, a nonprofit-style entity founded in 2023, together maintain Arbitrum today. Offchain Labs holds a large share of the pre-DAO ARB allocation and built Nitro, Stylus, BoLD, and Timeboost. The Arbitrum Foundation oversees DAO governance operations, ecosystem grants, and stewardship of the ARB token. Its 2025 Transparency Report framed that year as the "Year of Institutional Adoption."
Arbitrum is governed on-chain through the Arbitrum DAO, where ARB holders vote directly or via delegation on protocol upgrades, treasury allocation, and parameter changes for Arbitrum One and Arbitrum Nova.
DAO participation has reportedly risen as governance structures continue to evolve.
Arbitrum's 2026 priorities center on Stylus, which lets developers deploy Rust and C/C++ contracts alongside Solidity, and BoLD, its permissionless validation system now live in production. Timeboost, a priority-fee auction mechanism, has returned more than $6 million to the DAO treasury in its first year of operation. As of August 2026, the Arbitrum Foundation is seeking DAO approval for a roughly $43 million 2027 operations budget, specified as $16 million in RWAs and stablecoins, 1,740 ETH, and 230 million ARB.
Trail of Bits has conducted multiple security assessments of Arbitrum's technology for Offchain Labs. These include assessments of the governance token and bridge (2023), ArbOS 30 and 31 Nitro upgrades (July 2024), the USDC Custom Gateway (August 2024), BoLD Optimized History Commitments (October 2024), and sequencer liveness (March 2025).
On July 23, 2026, AFX Trade, a decentralized perpetuals platform built on Arbitrum, lost approximately $24.15 million after attackers compromised its own third-party bridge's validator keys; Arbitrum's native bridge was unaffected. Top 10 wallets hold 49% of ARB supply, mainly unvested Offchain Labs and treasury allocations rather than exchange-traded concentration.