HUNTSVILLE, Ala.--(BUSINESS WIRE)--ADTRAN Holdings, Inc. (NASDAQ: ADTN and FSE: QH9) (the "Company†) today announced the pricing of its offering of $175.0 million aggregate principal amount of 3.75% convertible senior notes due 2030 (the "Notes†) in a private offering to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the "Securities Act†). The offering was upsized from the previously announced offering size of. ...