Adds valuation target in paragraph 1 and details throughout

June 15 (Reuters) - Doncasters is targeting a valuation of up to $4.43 billion in its U.S. initial public offering, the aerospace parts maker said on Monday.

The Derby, United Kingdom-based company is seeking up to $746.7 million by offering 23.3 million shares priced between $28 and $32 apiece.

The U.S. IPO market has gained momentum after a choppy start to the year, with aerospace and defense as well as AI infrastructure themes dominating the lineup since April.

Certain existing shareholders are set to buy roughly $66 million of Doncasters shares in a concurrent private placement.

Jefferies and Morgan Stanley are lead joint bookrunners. Doncasters will list on the New York Stock Exchange under the symbol "DPC".