Joanna L. Barney - 01 Mar 2026 Form 4/A - Amendment Insider Report for BOISE CASCADE Co (BCC)

Role: EVP, BMD
Signature: /s/ Jill M. Twedt, by power of atty
Issuer symbol: BCC
Transactions as of: 01 Mar 2026
Net transactions value: $0
Form type: 4/A - Amendment
Filing time: 13 Mar 2026, 16:40:05 UTC
Date Of Original Report: 03 Mar 2026
Previous filing: 05 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Barney Joanna L.	EVP, BMD	C/O BOISE CASCADE COMPANY, 1111 WEST JEFFERSON STREET, SUITE 300, BOISE	/s/ Jill M. Twedt, by power of atty	13 Mar 2026	0002056703

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BCC	Common Stock, par value $0.01	Award		+6,345	+51%	$0.000000^*	18,717	01 Mar 2026	Direct	F1
transaction	BCC	Common Stock, par value $0.01	Tax liability		-911	-4.9%	$82.74^*	17,806	01 Mar 2026	Direct	F2
transaction	BCC	Common Stock, par value $0.01	Tax liability		-1,313	-7.4%	$82.74^*	16,493	01 Mar 2026	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents shares underlying 2026 restricted stock unit award. Shares will be deliverable in three equal tranches on March 1, 2027, 2028 and 2029.
F2	This amendment corrects the number of RSU shares withheld for taxes.
F3	This amendment corrects the number of PSU shares withheld for taxes.