The CoinMarketCap Altcoin Season Index doesn't list the specific 14 altcoins that outperformed Bitcoin in the last 90 days, but it excludes stablecoins like Tether and wrapped tokens like WBTC. You'd need to dig into CoinMarketCap's top 100 coins and compare their 90-day performance against Bitcoin to find the outperformers. Likely candidates could be high-momentum altcoins like Solana or Avalanche if they’re in the top 100—check their charts!