The level of investment or size of the stake has not been revealed.
Ponooc is the independent investment arm of Dutch trading firm Pon Holdings. Ponooc's other investments include battery storage and geothermal energy, Lagerwey said.
Ponooc was aided in the transaction by French financial advisers Green Giraffe, which guided Ponooc, in part, on the competiveness of Lagerwey's next generation L136 4MW turbine.
Lagerwey said the investment would allow it to "accelerate its growth plans", including new turbine prototypes and the construction of a new production facility.
"This investment strengthens our base and gives us the opportunity to achieve our ambitions in the field of innovation and cost reduction of wind energy significantly faster," said Lagerwey CEO Huib Morelisse.
"With our new L136 platform we have developed the largest IEC II wind turbine in the market. But we also want to develop the technique to install wind turbines further. For example, with the Lagerwey Crane which can climb to any height and makes large and heavy cranes obsolete," Morelisse added.
In June, the Dutch firm revealed designs for a turbine "climbing crane", which can be attached to the turbine tower to install higher tower segments, nacelles and rotors, Lagerwey claimed.