Rushden & Diamonds manager Justin Edinburgh says he is surprised he did not lose players in January.
Winger Lee Tomlin, defenders Curtis Osano and Kurt Robinson, and goalkeeper Dale Roberts were linked with moves.
Edinburgh told BBC Radio Northampton: "We had an offer for Dale which we didn't accept. But otherwise no offers, which surprises me, but pleases me.
"It's only a matter of time before they play at a higher level, but now they could be league players with us."
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Tomlin, 21, was strongly linked with a move to Peterborough United after director of football Barry Fry expressed an interest in the winger.
"We spoke individually with Lee and he just needs to continue the form he's shown," said Edinburgh.
"He's shown maturity in the performances he's produced. But he, or we, will progress and he'll be playing at a higher level."
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