13D Filing: 1347 Investors LLC and Limbach Holdings Inc. (LMB)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

SCHEDULE 13D

 

Under the Securities
Exchange Act of 1934

(Amendment No.
5)

 

Limbach Holdings, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

53263P 105

 (CUSIP Number)

1347 Investors LLC

150 Pierce Road, 6th Floor

Itasca, IL 60143

(847) 700-8064

 

Copy to:

 

Joel L. Rubinstein

Elliott M. Smith

Winston & Strawn LLP

200 Park Avenue

New York, New York 10166

(212) 294-6700

 (Name, Address and Telephone Number
of Person Authorized to Receive Notices and Communications)

January 12, 2018

 (Date of Event which Requires Filing
of this Statement)

If the filing person has previously filed a statement on Schedule
13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e),
240.13d-1(f) or 240.13d-1(g), check the following box. o

The information required on the remainder of this cover page
shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”)
or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.