ECB warns of highly centralized DeFi governance: AAVE's five largest holders control over 60% of the supply.

The European Central Bank (ECB) published a working paper on March 26, 2026, revealing the extreme concentration of governance power in major DeFi protocols, challenging the narrative of "complete decentralization." The report focuses on protocols such as Aave (AAVE), MakerDAO (now Sky), Uniswap (UNI), and Ampleforth, pointing out that top holders dominate voting and decision-making, potentially affecting the application of exemptions under EU MiCA regulations. Latest on-chain data shows that the top five addresses controlling over 60% of the supply of AAVE-related tokens, far exceeding "half the supply," highlighting the skewed control towards a few entities. (Cointelegraph )

The report emphasizes that this concentration is not a legacy issue from earlier distributions. Even after these protocols have been operating for nearly a decade, the top 100 addresses still control over 80% of governance tokens, and many are associated with the protocols themselves or exchanges (such as Binance). Voting power is even more concentrated: top voters are mostly proxies, with about one-third remaining unidentified, making it difficult to identify regulatory anchors (such as token holders or developers). This directly questions whether DeFi DAOs can circumvent MiCA licensing requirements, potentially forcing protocols to establish legal entities, reserve capital, and comply with consumer protection rules. The Block

ECB Report Core Data Comparison

ECB analysis is based on position snapshots from November 2022 and May 2023. The following are the control percentages (>80%) of the top holders of the four protocols:

ECB Paper

These data challenge the assumption of DeFi's "decentralization over time": governance proposals often involve adjustments to risk parameters (such as fees and upgrades), and a small number of entities can unilaterally decide changes affecting billions of dollars in assets. For example, in one MakerDAO proposal, only 5 delegated addresses decided the fate of $500 million in assets. (BitcoinWorld)

AAVE holder concentration evidence (2026-03-28 06:14 UTC)

On-chain snapshots confirm that AAVE governance is highly centralized, with top-level addresses (including contracts) controlling the majority of the supply. Aave (anyAAVE) contracts hold 43.808% of the supply, and the top five holders collectively control over 60%, validating ECB's warning of "the top five holders controlling half the supply." This data reflects the current supply distribution and is not a historical legacy, suggesting continued risk control. Moralis

AAVE Top Holder Distribution Moralis

Subsequent addresses are gradually dispersing their holdings, but the top 10 still account for over 70%. The prominent presence of contract addresses (such as anyAAVE) may represent protocol treasuries or staking pools, further amplifying the concentration effect. This distribution aligns with ECB's observations: exchange/protocol-related holdings dominate, increasing the risk of a "decentralized theater."

Regulation and Market Impact

MiCA's exemption faces challenges : MiCA excludes "fully decentralized" services, but the ECB paper states that AAVE and others struggle to meet the requirements—top-level holdings >50% of the founding team/CEX, and largely anonymous proxy voting. If the protocol is considered centralized, it may require an EU license, involving capital, board of directors, and accountability mechanisms, challenging the anonymity inherent in DAOs. (TradingView )

The actual risks are amplified : centralized governance is prone to collisions, such as the recent DAO controversy at Aave (Aave Labs' 50M package proposal), where a small number of participants dominate. Although Aave's TVL ranks first in DeFi (The Block data), founder Stani Kulechov admitted that DAOs are "exceptionally difficult"—slow decision-making and frequent internal conflicts. Crypto.news

Industry Response and Limitations : Consensys lawyers criticized ECB data as "pseudo-anonymous and incomplete," subjectively defining "true decentralization" as immutable software, but acknowledging the prevalence of early centralization. The paper reflects only the author's views, not those of ECB, and does not cover the entire DeFi ecosystem. TradingView

Outlook and Recommendations

DeFi governance is weakening the narrative of "permissionless innovation," and platforms like AAVE need to optimize their delegation mechanisms (such as identity verification and anti-whale voting) or shift to revenue sharing to decentralize power. In the short term, MiCA enforcement may lead to TVL outflows to more decentralized chains; in the long term, regulatory focus will shift to on-chain behavior tracking.

Investment Perspective : AAVE's current concentration exacerbates unlocking/proposal risks, while stable top holdings suggest low liquidity. Monitor the Q2 MiCA details; if exemptions are tightened, prices could face downward pressure by 10-20%. Diversification across multiple protocol baskets is recommended, or tracking delegated voting activity as a leading indicator.

Data limitations : On-chain data only includes EVM snapshots, excluding L2/cross-chain holdings; news focuses on 2023 data, the current situation in 2026 may change slightly, but the top proportions remain stable, verifying the trend.