diff --git a/crates/stages/src/stages/tx_lookup.rs b/crates/stages/src/stages/tx_lookup.rs
index 7594d4a4a7..305477c089 100644
--- a/crates/stages/src/stages/tx_lookup.rs
+++ b/crates/stages/src/stages/tx_lookup.rs
@@ -2,6 +2,7 @@ use crate::{
     exec_or_return, ExecAction, ExecInput, ExecOutput, Stage, StageError, StageId, UnwindInput,
     UnwindOutput,
 };
+use rayon::prelude::*;
 use reth_db::{
     cursor::{DbCursorRO, DbCursorRW},
     database::Database,
@@ -62,20 +63,26 @@ impl<DB: Database> Stage<DB> for TransactionLookupStage {
         // Walk over block bodies within a specified range.
         let bodies = block_meta_cursor.walk_range(start_block..=end_block)?;
 
-        // Collect transactions for each body
-        let mut tx_list = vec![];
+        let mut total_transactions = 0;
+        let mut tx_ranges = Vec::with_capacity((end_block - start_block) as usize);
+
         for block_meta_entry in bodies {
             let (_, block_meta) = block_meta_entry?;
-            let transactions = tx_cursor.walk_range(block_meta.tx_num_range())?;
+            total_transactions += block_meta.tx_count;
+            tx_ranges.push(block_meta.tx_num_range());
+        }
 
-            for tx_entry in transactions {
+        // Collect transactions for each body
+        let mut tx_list = Vec::with_capacity(total_transactions as usize);
+        for tx_num_range in tx_ranges {
+            for tx_entry in tx_cursor.walk_range(tx_num_range)? {
                 let (id, transaction) = tx_entry?;
                 tx_list.push((transaction.hash(), id));
             }
         }
 
         // Sort before inserting the reverse lookup for hash -> tx_id.
-        tx_list.sort_by(|txa, txb| txa.0.cmp(&txb.0));
+        tx_list.par_sort_unstable_by(|txa, txb| txa.0.cmp(&txb.0));
 
         let mut txhash_cursor = tx.cursor_write::<tables::TxHashNumber>()?;