Arbitrum’s September Record Driven by Robinhood Chain Licensing Fees

Arbitrum reported a record $5.45 million in revenue for September 2026, a figure five times higher than previous months. However, the breakdown reveals that 87% of this revenue came from licensing fees paid by chains built on Arbitrum’s technology, primarily Robinhood Chain. Arbitrum One, the main network, earned only about $507,390 in transaction fees, which is considered ordinary rather than historic. The record revenue is largely attributed to Robinhood Chain’s activity during the memecoin boom.

The revenue breakdown shows that $4.75 million came from Orbit licensing fees, while other revenue streams like transaction fees and treasury management lagged far behind. Robinhood Chain, launched in July 2026, pays 10% of its net protocol revenue back to the Arbitrum ecosystem under the Expansion Program. In September, this amounted to $4.75 million, close to Standard Chartered’s estimated $5 million.

Most of September’s revenue likely came in the first two weeks, as trading activity cooled significantly by mid-month. Robinhood Chain also ended its 90-day gas subsidy on September 29, meaning October will be the first month to reflect true demand without these tailwinds. The bull case for Arbitrum’s licensing model hinges on traditional assets moving onchain, but for now, memecoins and launchpads are driving most of the activity.

Priority Gas Auctions, introduced on September 24, earned over $120,000 in their first week, replacing the Timeboost system. This revenue is counted within transaction fees and could indicate growing demand on Arbitrum One. The $5.45 million in revenue flows to the Arbitrum DAO treasury and developer fund, but ARB holders have no automatic claim on it unless governance decides otherwise.