BXC

SEC source: 0001104659-26-093340 · tm2622720-1_4seq1.xml · nonDerivative · entry 1

Fennebresque Kim S · CIK 0001361379 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By grantor trust

Disclosed balance after: 0

F1 · price: The transactions reported in this line item were consummated at prices ranging from $82.46 to $85.51 per share, resulting in a weighted average purchase price of $84.15 per share. The reporting person undertakes to provide BXC, any security holder of BXC, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

SEC source: 0001104659-26-071870 · tm2617268-3_4seq1.xml · derivative · entry 6

DeBrock Kimberly Ann · CIK 0001921260 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 214

Underlying: Common Stock · 214 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F4 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

F4 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

SEC source: 0001104659-26-071870 · tm2617268-3_4seq1.xml · nonDerivative · entry 4

DeBrock Kimberly Ann · CIK 0001921260 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,086

F5 · shares: These shares were withheld to cover tax withholding obligations when 214 time-based restricted stock units vested on June 7, 2026.

SEC source: 0001104659-26-071870 · tm2617268-3_4seq1.xml · nonDerivative · entry 3

DeBrock Kimberly Ann · CIK 0001921260 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,148

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · derivative · entry 9

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,120

Underlying: Common Stock · 5,120 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F6 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

F6 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · derivative · entry 8

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,411 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F4 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2024.

F4 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2024.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · nonDerivative · entry 6

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,725

F7 · shares: These shares were withheld to cover tax withholding obligations when 5,120 time-based restricted stock units vested on June 7, 2026.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · nonDerivative · entry 5

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,006

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F6 · shares: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · nonDerivative · entry 4

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,886

F5 · shares: These shares were withheld to cover tax withholding obligations when 5,411 time-based restricted stock units vested on June 7, 2026.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · nonDerivative · entry 3

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,297

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2024.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · derivative · entry 9

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 469

Underlying: Common Stock · 469 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F6 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

F6 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · derivative · entry 8

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 133 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F4 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2024.

F4 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2024.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · nonDerivative · entry 6

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 962

F7 · shares: These shares were withheld to cover tax withholding obligations when 469 time-based restricted stock units vested on June 7, 2026.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · nonDerivative · entry 5

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,101

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F6 · shares: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2025.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · nonDerivative · entry 4

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 632

F5 · shares: These shares were withheld to cover tax withholding obligations when 133 time-based restricted stock units vested on June 7, 2026.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · nonDerivative · entry 3

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 672

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: Represents the conversion of restricted stock units that vested on June 7, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 7, 2024.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071870 · tm2617268-3_4seq1.xml · derivative · entry 5

DeBrock Kimberly Ann · CIK 0001921260 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,280

Underlying: Common Stock · 641 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

F1 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

SEC source: 0001104659-26-071870 · tm2617268-3_4seq1.xml · nonDerivative · entry 2

DeBrock Kimberly Ann · CIK 0001921260 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 934

F3 · shares: These shares were withheld to cover tax withholding obligations when 641 time-based restricted stock units vested on June 6, 2026.

SEC source: 0001104659-26-071870 · tm2617268-3_4seq1.xml · nonDerivative · entry 1

DeBrock Kimberly Ann · CIK 0001921260 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,118

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · derivative · entry 7

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,317

Underlying: Common Stock · 8,659 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

F1 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · nonDerivative · entry 2

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,886

F3 · shares: These shares were withheld to cover tax withholding obligations when 8,659 time-based restricted stock units vested on June 6, 2026.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · nonDerivative · entry 1

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,743

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · derivative · entry 7

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,528

Underlying: Common Stock · 765 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

F1 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · nonDerivative · entry 2

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 539

F3 · shares: These shares were withheld to cover tax withholding obligations when 765 time-based restricted stock units vested on June 6, 2026.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · nonDerivative · entry 1

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 765

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on June 6, 2026.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071869 · tm2617268-2_4seq1.xml · derivative · entry 3

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,556

Underlying: Common Stock · 1,778 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time-based restricted stock units that vest in three equal installments, with the first installment vesting on June 6, 2026.

F1 · derivative.expiration_date: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time-based restricted stock units that vest in three equal installments, with the first installment vesting on June 6, 2026.

SEC source: 0001104659-26-071869 · tm2617268-2_4seq1.xml · nonDerivative · entry 2

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,395

F3 · shares: These shares were withheld to cover tax withholding obligations when 1,778 time-based restricted stock units vested on June 6, 2026.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071869 · tm2617268-2_4seq1.xml · nonDerivative · entry 1

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,187

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the conversion of restricted stock units that vested on June 6, 2026. These are time-based restricted stock units that vest in three equal installments, with the first installment vesting on June 6, 2026.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-071870 · tm2617268-3_4seq1.xml · derivative · entry 7

DeBrock Kimberly Ann · CIK 0001921260 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,650

Underlying: Common Stock · 2,650 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F6 · derivative.exercise_date: These are time-based restricted stock units that vest in three equal installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F6 · derivative.expiration_date: These are time-based restricted stock units that vest in three equal installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · derivative · entry 12

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,821

Underlying: Common Stock · 29,821 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F10 · derivative.exercise_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date. The Reporting Person is not permitted to sell, transfer, pledge, or assign these restricted stock units for a period of two (2) years from June 5, 2029.

F10 · derivative.expiration_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date. The Reporting Person is not permitted to sell, transfer, pledge, or assign these restricted stock units for a period of two (2) years from June 5, 2029.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · derivative · entry 11

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,941

Underlying: Common Stock · 9,941 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F9 · derivative.exercise_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F9 · derivative.expiration_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-071861 · tm2617268-1_4seq1.xml · derivative · entry 10

Reddy Shyam K. · CIK 0001643872 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,761

Underlying: Common Stock · 39,761 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F8 · derivative.exercise_date: These are time-based restricted stock units that vest in three equal annual installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F8 · derivative.expiration_date: These are time-based restricted stock units that vest in three equal annual installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · derivative · entry 12

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,261

Underlying: Common Stock · 3,261 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F10 · derivative.exercise_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date. The Reporting Person is not permitted to sell, transfer, pledge, or assign these restricted stock units for a period of two (2) years from June 5, 2029.

F10 · derivative.expiration_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date. The Reporting Person is not permitted to sell, transfer, pledge, or assign these restricted stock units for a period of two (2) years from June 5, 2029.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · derivative · entry 11

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,088

Underlying: Common Stock · 1,088 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F9 · derivative.exercise_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F9 · derivative.expiration_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-071872 · tm2617268-4_4seq1.xml · derivative · entry 10

Oei Leonard Alexander · CIK 0002104095 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,351

Underlying: Common Stock · 4,352 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F8 · derivative.exercise_date: These are time-based restricted stock units that vest in three equal installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F8 · derivative.expiration_date: These are time-based restricted stock units that vest in three equal installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-071869 · tm2617268-2_4seq1.xml · derivative · entry 6

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,519

Underlying: Common Stock · 5,519 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F6 · derivative.exercise_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date. The Reporting Person is not permitted to sell, transfer, pledge, or assign these restricted stock units for a period of two (2) years from June 5, 2029.

F6 · derivative.expiration_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date. The Reporting Person is not permitted to sell, transfer, pledge, or assign these restricted stock units for a period of two (2) years from June 5, 2029.

SEC source: 0001104659-26-071869 · tm2617268-2_4seq1.xml · derivative · entry 5

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,840

Underlying: Common Stock · 1,840 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F5 · derivative.exercise_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F5 · derivative.expiration_date: These are time-based restricted stock units that vest on June 5, 2029. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-071869 · tm2617268-2_4seq1.xml · derivative · entry 4

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,359

Underlying: Common Stock · 7,359 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F4 · derivative.exercise_date: These are time-based restricted stock units that vest in three equal installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F4 · derivative.expiration_date: These are time-based restricted stock units that vest in three equal installments commencing on June 5, 2027. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-064477 · tm2615224-1_4seq1.xml · derivative · entry 3

CORLEY CHRISTINA M · CIK 0001270206 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,297 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001104659-26-064477 · tm2615224-1_4seq1.xml · nonDerivative · entry 1

CORLEY CHRISTINA M · CIK 0001270206 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,297

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-064490 · tm2615224-6_4seq1.xml · derivative · entry 3

SMITH J DAVID · CIK 0001272974 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,074 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001104659-26-064490 · tm2615224-6_4seq1.xml · nonDerivative · entry 1

SMITH J DAVID · CIK 0001272974 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,517

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-064498 · tm2615224-8_4seq1.xml · derivative · entry 3

ZAKAS MARIETTA EDMUNDS · CIK 0001191471 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,074 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001104659-26-064498 · tm2615224-8_4seq1.xml · nonDerivative · entry 1

ZAKAS MARIETTA EDMUNDS · CIK 0001191471 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,965

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-064502 · tm2615224-9_4seq1.xml · derivative · entry 3

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,575

Underlying: Common Stock · 1,788 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F3 · derivative.exercise_date: These are time-based restricted stock units that vest ratably over three years commencing on May 19, 2026. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

F3 · derivative.expiration_date: These are time-based restricted stock units that vest ratably over three years commencing on May 19, 2026. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.

SEC source: 0001104659-26-064502 · tm2615224-9_4seq1.xml · nonDerivative · entry 2

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,409

SEC source: 0001104659-26-064502 · tm2615224-9_4seq1.xml · nonDerivative · entry 1

Wall Christopher K · CIK 0001820194 · SVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,938

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-064491 · tm2615224-7_4seq1.xml · derivative · entry 3

Yancey Carol B · CIK 0001570596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,074 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001104659-26-064491 · tm2615224-7_4seq1.xml · nonDerivative · entry 1

Yancey Carol B · CIK 0001570596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,517

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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.

F2 · price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

SEC source: 0001104659-26-064489 · tm2615224-5_4seq1.xml · derivative · entry 3

Lewis Mitchell B · CIK 0001597766 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,074 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.