Hyperliquid (HYPE) spearheaded altcoin buyback efforts in 2025, spending $644.6 million, which accounts for nearly half of the total $1.4 billion expended across various projects. The company repurchased 21.36 million HYPE tokens, representing 2.1% of its total supply, through its Assistance Fund. Following Hyperliquid, LayerZero (ZRO) and Pump.fun (PUMP) executed buybacks of $150 million and $138.2 million, respectively.