UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Filed by the Registrant ý Filed by a Party other than the Registrant ☐

Check the appropriate box:
☒	Preliminary Proxy Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☐	Definitive Additional Materials
☐	Soliciting Material Pursuant to §240 14a-12

Infrastructure and Energy Alternatives, Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):
ý	No fee required
☐	Fee paid previously with preliminary materials
☐	Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

EXPLANATORY NOTE

On March 8, 2022, Infrastructure and Energy Alternatives, Inc. filed its Preliminary Proxy Statement on Schedule 14A (the “Proxy Statement”) for the Annual Meeting of Stockholders to be held on May 5, 2022. This Amendment No. 1 (this “Amendment”) to Schedule 14A is being filed to include the proxy card, which was omitted from the Proxy Statement due to the timing of its receipt. All other portions of the Proxy Statement remain unchanged.

This Amendment should be read with the Proxy Statement, and, from and after the date of this Amendment, any references to the “Proxy Statement” shall be deemed to include the Proxy Statement as amended hereby. Except as specifically discussed in this Explanatory Note, this Amendment does not otherwise modify or update any other disclosures presented in the Proxy Statement. In addition, this Amendment does not reflect events occurring after the date of the Proxy Statement or modify or update disclosures that may have been affected by subsequent events.