BGC Partners Inc. made an offer to exchange up to $450 million of its outstanding 5.375% senior notes due 2023 sold in a July private offering for an equivalent amount of its 5.375% senior notes due 2023.

The offer will expire Sept. 7, unless extended. The company said the offer was made to meet its obligations under a registration rights agreement connected to the issuance of the old notes, and is not a new financing transaction.