Sec Form 4 Filing - GARNER CHARLES HUGH FARKAS @ Infrastructure & Energy Alternatives, Inc. - 2022-10-07

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person GARNER CHARLES HUGH FARKAS 2. Issuer Name and Ticker or Trading Symbol Infrastructure & Energy Alternatives, Inc. [ IEA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 130 WEST 42ND STREET, 17TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 10/07/2022 (Street) NEW YORK, NY10036 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.0001 per share 10/07/2022 D 129,383 D 0 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Warrants to purchase 1/2 shares of Common Stock $ 5.75( 2 ) 10/07/2022 D 20,000 04/26/2018 03/26/2023 Common Stock, par value $0.0001 per share 10,000 ( 2 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other GARNER CHARLES HUGH FARKAS 130 WEST 42ND STREET, 17TH FLOOR NEW YORK, NY10036 X Signatures s/ Charles Hugh Farkas Garner 10/07/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Agreement and Plan of Merger by and among the issuer, MasTec, Inc. ("Parent"), and Indigo Acquisition I Corp., a wholly owned subsidiary of Parent ("Merger Sub"), Merger Sub merged with and into the issuer (the "Merger") on October 7, 2022 (the "Effective Time"), with the issuer continuing as the surviving corporation in the Merger and becoming a wholly owned subsidiary of Parent. In connection with the Merger, at the Effective Time, each share of Common Stock was canceled and converted into the right to receive (a) $10.50 in cash and (b) 0.0483 of a share of Parent common stock. ( 2 )Represents warrants subject to the Amended and Restated Warrant Agreement, dated as of March 26, 2018, by and between the Company and Continental Stock Transfer & Trust Company, as warrant agent (the "Warrant Agreement"). In connection with the Merger, as of the Effective Time, the warrants ceased to represent warrants exercisable for Common Stock of the issuer and became warrants exercisable for an aggregate of (i) $10,500 in cash and (ii) 483 shares of Parent common stock.

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