Arbitrum DAO reports $6.19M in first-half income as Robinhood Chain becomes a fee engine

The Arbitrum Foundation published an unaudited report on Wednesday, Sept. 2, claiming the Arbitrum DAO accrued $6.19 million in income over the first half of 2026, spread across four lines: Arbitrum One transaction fees; Timeboost, which auctions priority access to the network's sequencer; Expansion Program licensing fees from chains built on Arbitrum's tech; and treasury returns. Gross margins on protocol revenue topped 97%, up from more than 90% in 2025, per the report, as reported by The Block. The DAO also held $125 million in non-ARB assets.

The newest lever is Robinhood Chain, built on Arbitrum's stack, which went live on mainnet July 1. Under the Expansion Program, chains that settle outside Arbitrum One and Arbitrum Nova must return 10% of net protocol revenue to the Arbitrum ecosystem. In July, that licensing line brought in $360,000 — 35% of the DAO's income that month, the Foundation said.

Activity on Robinhood Chain has since climbed. The Block's dashboard recorded a record $3.75 million in user fees on Sept. 1, which Growthepie data put ahead of Ethereum mainnet and Base for the day. Decentralized exchange volume on the chain topped $1.5 billion on Sept. 1, with total value locked just over $750 million. Robinhood Chain had processed more than 200 million testnet transactions before mainnet launch, and Robinhood had previously issued stock tokens on Arbitrum One.

Key facts

• $6.19 million DAO income, H1 2026; gross margins above 97% on protocol revenue — Arbitrum Foundation report (via The Block).
• Four income lines: Arbitrum One fees, Timeboost, Expansion Program licensing, treasury returns — same report.
• July Expansion Program fees: $360,000, or 35% of monthly income; Robinhood Chain live since July 1 — same report.
• Record $3.75M in Robinhood Chain fees on Sept. 1, ahead of Ethereum and Base — The Block dashboard / Growthepie.
• DEX volume >$1.5B (Sept. 1); TVL ~$750M; DAO held $125M non-ARB assets — report and The Block.
• Network processed 478 million transactions in H1, ~18% of its 2.7 billion lifetime total — report.

The real-world read

The report is unaudited and issued by the Arbitrum Foundation about its own network, so the headline figures are self-reported by an interested party. The most quotable line — Head of Investment Strategy Brendan Ma's claim that Q3 income is "on track to exceed the second quarter by more than 40%" — is a forecast built on a single month (July) and a single fast-growing dependency, Robinhood Chain. That concentration cuts both ways: 35% of July income leaning on one licensee is momentum and a single point of failure. Ma also concedes "subdued market conditions across the industry," which sits awkwardly against the growth framing. Note too that "income" here is the DAO's cut, not Robinhood Chain's gross fees; the $3.75M record is what users paid on that chain, of which only 10% of net revenue flows back to Arbitrum.

Opinion, and whose

• "The first half of 2026 shows the Arbitrum ecosystem's financial profile broadening" and Q3 income tracking "more than 40%" above Q2 — Arbitrum Foundation's Brendan Ma, an interested party.

Sources

• The Block (reputable secondary), Sept. 2, 2026 — reported the Arbitrum Foundation's unaudited H1 report, the $6.19M figure, Robinhood Chain fee data, and Ma's statements; also supplied dashboard fee/volume figures and cited Growthepie for the cross-chain ranking. The Block discloses Foresight Ventures as majority investor.
• Arbitrum Foundation report (primary, unaudited; self-reported by the network operator) — the underlying income, margin, and activity figures.

This is news, not financial advice.