The Owls have snared players with a matter of minutes to go on a number of occasions, keeping supporters on their toes right up until the final moments.
The deadline swoops have offered big hits and, well, some fairly spectacular misses. But how do you rate them? Take a look at just 15 that spring to mind..
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1. Achraf Lazaar
The energetic left-back arrived on loan from Newcastle in January 2019 but played only a handful of times before an injury curtailed his progress. A Morocco international, he spent last season on loan at Serie B Cosenza but made only nine appearances.
Photo: Steve Ellis
2. Barry Bannan
The current club captain and Wednesday talisman, little Scot Bannan joined the club on deadline day August 2015 on an initial one-year deal after a turbulent time at Crystal Palace. An undisclosed fee has turned out to be quite the deal.
Photo: Nathan Stirk
3. David Bates
An enigma. A Scotland international that arrived in a whirl of optimism, Bates played only once for Wednesday's first team, in a League Cup win over Rotherham. He performed well and kept a clean sheet but never appeared again. A Hamburg player, he signed for Belgian outfit Cercle Brugge in August on loan but is yet to play.
Photo: Steve Ellis.
4. Martin Taylor
Another defender who arrived with a reputation was former Premier League hard man Martin Taylor, who signed for Wednesday on deadline day, August 2012. Having made over 100 appearances at Blackburn, Birmingham and Watford previously it was hoped he would provide steel and consistency, but he made only 13 appearances in two injury-ravaged seasons. He was loaned to Brentford in 2013/14 before retiring.
Photo: Matthew Lewis