SEC Form 4 · accession 0001437749-26-025258

Business First Bancshares, Inc. · BFST

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — EVP&COO of b1Bank

Period of report

Jul 30, 2026

Accepted (ET)

Jul 31, 2026 · 6:08 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0001624322

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
COMMON STOCK^F1,F2	Jul 30, 2026	S	4,200	$32.08	D	77,139	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Restricted Stock Units^F3	$0.00	holding	—	—	—	—	—	Common Stock	13,374	13,374	D

F1This transaction was executed in multiple trades at prices ranging from $31.98 to $32.14. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a securityholder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
F2Includes 27,000 shares held by the reporting person's investment retirement account.
F3Includes: (a) 3,722 time-based restricted stock units granted to the reporting person on December 12, 2024, which will vest in two substantially equal installments on the second and third anniversary of the issuance date; (b) 3,912 time-based restricted stock units granted to the reporting person on March 1, 2025, which will vest in two substantially equal installments on the second and third anniversary of the issuance date; and (c) 5,740 time-based restricted stock units granted to the reporting person on March 2, 2026, which will vest in three substantially equal installments on the first, second, and third anniversary of the issuance date.