Pasadena insurance brokerage Bolton & Co. has purchased Preferred Specialty Insurance Services of Glendora.

As part of the transaction that closed on Dec. 31 and announced Monday, Todd Jackson, Preferred Specialty Insurance Services president, will join Bolton as vice president. Jackson and his team will move to Bolton’s Pasadena office.

“Preferred Specialty’s employees and philosophy mirror ours and we are pleased to add their highly regarded reputation to our organization,” Steve Brockmeyer, Bolton chief executive, said in a statement.

Bolton, an employee-owned insurance brokerage founded in 1931, has 125 insurance professionals and placed more than $250 million in insurance policies with clients last year. The company has made several acquisitions over the past year.