However, he is delighted to have three of his key players tied down to new deals ahead of their match against QPR on Saturday.
James McCarthy, Ben Watson and Emmerson Boyce have all penned new contracts at the DW Stadium as Martinez looks to give stability to the side that just avoided relegation last season.
The game at home to QPR, which has been brought forward after the Wigan Warriors reached the Challenge Cup final, represents Wigan's third consecutive game against a newly-promoted team, and although the visitors have been quieter than expected in the transfer market, their business outweighs Martinez's side.
But the 38-year-old Spaniard has focused more on tying down the talent he already has rather than accruing new players.
"We love to speak about possible targets and possible signings but the reality is that the future of your football club lies in the stability of the dressing room and having the right characters and personalities," he said.
McCarthy has signed a new five-year deal, despite being linked with a summer move away from Wigan, and his manager is in no doubt the Republic of Ireland international will have a prosperous time in the north west.
Martinez said: "It is great, great news. James is only 20 and he has over 40 starts in the PL to achieve that and the manner in which he has had with his role with Wigan Athletic it shows his maturity goes well beyond his age.
"For him to commit himself is really good news and James is a true ambassador for Wigan Athletic and we are delighted he has committed his future alongside Ben Watson and Emmerson Boyce."
Former Crystal Palace defender Boyce has been a permanent fixture in the Wigan side since his move to the club in 2006, and he is now only 11 league appearances away from setting the club's new Premier League record, something Martinez is very appreciative of.
"If you are looking at his record at the football club he loves playing football and is a reliable character and is a really leader on the quiet," he said.
"He sets examples by the way he works and those players have immense value for us, I feel he can go on for many, many years.
"I'm delighted we have extended his stay and he is a great example for the youngsters at our football club."
QPR, last season's npower Championship winners, face Wigan after Martinez's outfit have already faced fellow new-boys Norwich and Swansea, and the Swans' former boss was happy with the performance of the Latics at the Liberty Stadium last weekend.
"In many ways we could analyse the games in different aspects," Martinez said.
"I just felt that in the manner we competed and worked for each other we have to be very pleased.
"I felt the performance will allow us to keep growing and carry on getting to the level we know we can reach. I'm sure that if we carry on showing that sort of level away from home we will get the results we deserve."
Despite the new contracts, Martinez may be forced into the transfer market as he has lost key players to injuries.
Antolin Alcaraz and Steve Gohouri are definitely out while Victor Moses and Hugo Rodallega may also be absent on Saturday.