The operating partnership of office real estate investment trust Kilroy Realty Corp. launched a private placement of $250 million of two series of senior unsecured notes due 2026.

Kilroy Realty LP expects to issue $200 million of 4.35% notes due Oct. 18, 2026, by Oct. 22 and $50 million of 4.30% notes due July 18, 2026, by July 20.

The company will use the proceeds to finance development projects, among other general corporate purposes.