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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5. Massimo Luongo
Signed on an undisclosed fee from Championship rivals QPR on the deadline day of last summer, Aussie international Luongo made an impact in his opening matches for the Owls before injuries curtailed his efforts. Now a key man in the Owls' new-look midfield three and one of the division's best performers this season. Photo: Alex Livesey
6. Jacob Butterfield
Rocking up on a loan deal with out-of-favour forward Sam Winnall heading the opposite way, Butterfield came from Derby on August 31 2017. He played 23 times for the Owls in a torrid second half to the season that saw Jos Luhukay fail to revive the Owls' season. Photo: Harry Trump
7. Connor Wickham
The third coming of Connor Wickham, this time as a Crystal Palace player and a much bigger boy, saw him score twice in 13 appearances having arrived alongside Windass on the last day of this year's January transfer window. Photo: Dan Mullan
8. Jay Bothroyd
Arriving on a short-term loan deal on deadline day August 2012, Jay Bothroyd was less than two years on from a solitary England cap when he joined Wednesday, having struggled to replicate his Cardiff form at QPR. He scored only once in 14 matches and has played in Thailand and Japan since. Still going at 38. Photo: Jamie McDonald