The Magpies spent more money than any other Premier League club in the transfer window, as they looked to ensure they had enough quality in their squad to avoid the drop.
Jonjo Shelvey, Henri Saivet, Seydou Doumbia and Andros Townsend have all arrived at St. James’ Park, but McClaren suggests that his side had other targets on their wishlist, too.
“We were flexible in this window,” he said. “You won’t believe the amount of names that were bandied about.
“It’s been an incredible month. We’ve been quiet at the front, but at the back we’ve been going crazy and working very hard.”
One of the players who Newcastle did try and sign was West Bromwich Albion’s Saido Berahino (Chronicle), but they were unable to agree a price for the 22-year-old.
The Magpies also attempted to sign Lyon striker Alexandre Lacazette (Daily Mirror), but were turned down by the French striker.
Despite these failures, Newcastle still showed great ambition in the transfer window, and their squad looks much stronger after the new additions.
The quartet will all be under pressure to hit the ground running on Tyneside, though, as their new club are fighting against the drop.
Newcastle are currently stationed in 18th place in the Premier League table, two points away from safety.