TL;DR
Bundling on Solana means grouping multiple transactions into a single atomic bundle via Jito, guaranteeing they execute together in a specific order within the same block.
Jito’s block builder accepts transaction bundles — a set of transactions that must execute sequentially and atomically. If any transaction in the bundle fails, the entire bundle reverts. Traders pay Jito tips to get their bundles included with priority. This is the infrastructure behind most MEV activity, sniper bots, and launch strategies on Solana.
When a token launches on Pump.fun, snipers submit bundles that include the token creation transaction followed by their buy transaction. This guarantees they’re the first buyer after the token exists. Some launch tools (including MadeOnSol’s launcher) let creators bundle their launch with initial buys from multiple wallets, ensuring they secure supply before public snipers.
Insiders may bundle buys from many wallets to accumulate a large percentage of supply while appearing as separate organic buyers. This makes holder distribution look healthy when it’s actually concentrated. Token Scanner’s bundle detection identifies wallets that bought in the same transaction bundle, revealing hidden concentration. A token where 40% of supply was bought in a single bundle is high risk regardless of how many wallets hold it.