X0306 4 2019-04-29 0001703956 Concrete Pumping Holdings, Inc. BBCP 0001704608 Hodges Brian C/O INDUSTREA ACQUISITION CORP. 28 WEST 44TH STREET, SUITE 501 NEW YORK NY 10036 1 Common Stock 2019-04-29 4 A 0 8535 A 37285 D Warrants 2019-04-29 4 D 0 55000 0 D Common Stock 55500 0 D The Reporting Person disposed of warrants to purchase 55,500 shares of common stock, par value $0.0001 per share, of the Issuer ("common stock") in exchange for 8,535 shares of common stock in an Issuer exchange offer. The warrants became exercisable on January 5, 2019 and had an expiration date of December 6, 2023. Each warrant was exercisable for one share of the Issuer's common stock at $11.50 per share. /s/ Joel Rubinstein, Attorney-in-Fact 2019-05-01