TLDR
Base, Arbitrum, and ethereum/">Optimism led Layer?2 transaction activity this week based on recent roundups.
- Base: reports put Base above 60% of L2 transactions by late 2025, carrying through recent weeks (market update).
- Arbitrum: another review shows Arbitrum near 51% share with 1.37 million daily active wallets (year?end review).
- Optimism: together with Base and Arbitrum, OP accounts for nearly 90% of L2 transactions (market update).
Deep Dive
1. Base Share
Recent coverage indicates activity has concentrated heavily on Base, with its share surpassing 60% by late 2025 and staying elevated, while smaller rollups saw sharp declines in usage (market update).
- The same report notes Base, Arbitrum, and Optimism collectively process nearly 90% of L2 transactions, underscoring consolidation across the L2 landscape (market update above).
If you track transaction?driven momentum, Bases share suggests it is the dominant venue for L2 user activity right now.
2. Arbitrum Leadership Signals
A separate year?end roundup attributes about 51% market share to Arbitrum alongside 1.37 million daily active wallets, reflecting deep usage and breadth of applications (year?end review).
- Methodologies differ (wallets, transactions, or periods), which can produce conflicting leadership headlines week to week.
Arbitrums large user base and sustained activity make it a core L2 to monitor for throughput and app deployments, even if weekly transaction shares vary by dataset.
3. Optimisms Role in the Concentrated Top Three
Coverage describes a Superchain concentration where Base, Arbitrum, and Optimism together process nearly 90% of L2 transactions (market update).
- That concentration implies most mainstream L2 usage is happening on these three, while many smaller rollups show low activity.
- Institutional and developer focus similarly cluster on these networks, supporting sustained throughput.
For practical monitoring, focusing on these three L2s captures the bulk of transaction flow and the highest signal?to?noise on fees and user growth.
Confidence: moderate. Different trackers use different measurement windows and metrics (transactions vs. wallets vs. TVL), so leadership headlines can conflict. Quick verification: check this weeks network dashboards for Base, Arbitrum, and Optimism linked from their official status pages.
Conclusion
Recent reports point to a concentrated L2 landscape where Base, Arbitrum, and Optimism carry the bulk of transaction flow, with Base often cited as the largest share and Arbitrum highlighted for strong user counts. The takeaway is to monitor these three for the clearest read on L2?driven activity, fees, and app traction, acknowledging that weekly leadership can vary by methodology and source.
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