X0306 4 2020-03-18 0 0001606163 Limbach Holdings, Inc. LMB 0001441252 Pratt Brian 5950 BERKSHIRE LANE, STE. 800 DALLAS TX 75225 0 0 1 0 Common Stock 2020-03-18 4 P 0 300726 3.7013 A 1135349 D Common Stock 2020-03-19 4 P 0 159465 3.6476 A 1294814 D Common Stock 2020-03-20 4 P 0 205186 3.7077 A 1500000 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.425 and $3.91. The reporting person undertakes to provide Limbach Holdings, Inc., any security holder of Limbach Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (1), (2) and (3) of this Form 4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.54 and $3.80. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.60 and $3.80. These shares are held as community property by Brian Pratt and his spouse, Barbara Pratt. Mrs. Pratt's address is the same as Mr. Pratt's address listed above. /s/ Brian Pratt 2020-03-23