X0609 4 2026-05-18 0 0001301787 BlueLinx Holdings Inc. BXC 0001272974 SMITH J DAVID false 1950 SPECTRUM CIRCLE MARIETTA GA 30067 1 0 0 0 0 Common Stock 2026-05-19 4 M 0 2074 A 16517 D Restricted Stock Units 2026-05-18 4 A 0 2749 0 A Common Stock 2749 2749 D Restricted Stock Units 2026-05-19 4 M 0 2074 0 D Common Stock 2074 0 D Restricted Stock Units Common Stock 12000 12000 D Restricted Stock Units Common Stock 5335 5335 D Restricted Stock Units Common Stock 8498 8498 D Restricted Stock Units Common Stock 6075 6075 D Represents the conversion of restricted stock units that vested on May 19, 2026. Vested shares will be delivered to the reporting person not later than 30 days after the vesting date. Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock. The restricted stock units vest on the first anniversary date of the date of grant. Vested shares will be delivered to the reporting person not later than 30 days after the vesting date. The restricted stock units vested on May 21, 2021. Vested shares will be delivered to the reporting person within 30 days after the earlier of May 21, 2030, or termination of reporting person's service on the Board of Directors. The restricted stock units vested on May 17, 2020. Vested shares will be delivered to the reporting person within 30 days after the earlier of May 17, 2029, or termination of reporting person's service on the Board of Directors. The restricted stock units vested on January 11, 2019. Vested shares will be delivered to the reporting person within 30 days after the earlier of January 11, 2028, or termination of reporting person's service on the Board of Directors. The restricted stock units vested on May 18, 2018. Vested shares will be delivered to the reporting person within 30 days after the earlier of May 18, 2027, or termination of reporting person's service on the Board of Directors. /s/ Christin Lumpkin as attorney-in-fact for J. David Smith 2026-05-20