The Owls maintained their 100 per cent S6 start to the new season with a hard-fought 3-2 win over Scunthorpe.
A brace from Gary Madine and Ben Marshall's maiden strike for Wednesday secured the points, with Bobby Grant and Mark Duffy on target for the Iron.
The victory was the Owls' fourth on the trot at Hillsborough this term and shot Gary Megson's men to the cusp of a top-six slot in League 1.
The game exploded into life with two key moments inside the opening five minutes.
First up, the Owls went into the lead on four minutes when Lewis Buxton found space down the right of the penalty area and sent a dangerous low cross into the six-yard box.
Clinton Morrison's flicked effort produced a save by Josh Lillis but Madine was on hand to stab home from close range.
Scunthorpe went straight up the other end to launch a counter and almost immediately won a penalty - or so they thought.
David Prutton was adjudged to have brought down Chris Dagnall and the referee pointed to the spot.
But after consulting with the linesman, the man in the middle reversed his decision and awarded the visitors a corner.
Then to add to Scunthorpe's woes, Morrison was in the right place from the resulting flag kick to clear Sam Togwell's effort off the line with Nicky Weaver beaten.
Things were going Wednesday's way and they duly doubled their lead on 17 minutes.
Liam Palmer fed Marshall down the left channel and the loanee from Stoke cut inside the area to cut a delicious drive around Lillis and claim his first goal for the Owls.
The Iron came back again, though, and it took a perfectly timed Jose Semedo tackle on Dagnall to prevent danger for Wednesday when the striker threatened to bear down on goal.
Dagnall then struck the foot of the post after taking an excellent pass from Jimmy Ryan into his stride before an incident-packed first half ended with Morrison curling narrowly wide following a smart turn to lose his marker.
Wednesday came out for the second half looking to see the game off and Marshall forced Lillis into an athletic save seconds after the resumption.
But the Iron continued to show their own mettle and only some stout defending from the hosts kept the two-goal cushion intact.
Scunthorpe carried on regardless and were finally rewarded on 67 minutes.
Andy Barcham picked out Grant making an angled run down the left of the box and the latter finished calmly to halve the deficit.
But just as the Iron thought they had a route back into the game, Wednesday pulled the rug and further extended their lead.
Semedo's powerful header forward sprung the Iron's offside trap, leaving Madine to advance on goal before shooting accurately across Lillis and into the back of the Kop net.
Still there was more to come from Scunthorpe, though, who refused to lie down. And on 86 minutes, substitute Duffy launched a blistering strike past Weaver to make it 3-2.
Then the same player came close to clinching what would have been a dramatic point but Weaver came to the rescue with a superb save to divert Duffy's glancing header.
Owls: Weaver, Buxton, Batth, Jones, Bennett, Palmer (O'Connor 82), Semedo, Prutton, Marshall, Madine, Morrison (Lines 57)
Unused substitutes: O'Donnell, R Johnson, Sedgwick
Scunthorpe: Lillis, Wright, Nolan, Togwell (Collins 64) Nelson, Ryan (Thompson 64), Dagnall, Norwood, Grant, Canavan, Barcham (Duffy 77)
Unused substitutes: Slocombe, Reid