Statement of Changes in Beneficial Ownership (4)

FORM 4 [X] 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 OF SECURITIES	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* CORTINOVIS STEPHEN P	2. Issuer Name and Ticker or Trading Symbol Aegion Corp [ AEGN ]	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) 17988 EDISON AVE	3. Date of Earliest Transaction (MM/DD/YYYY) 5/17/2021
(Street) CHESTERFIELD, MO 63005 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	5/17/2021		D⁽¹⁾⁽²⁾		55739	D	⁽¹⁾⁽²⁾	0	D
Common Stock	5/17/2021		D⁽¹⁾⁽²⁾		2800	D	⁽¹⁾⁽²⁾	0	I	By Spouse in Individual Retirement Account
Common Stock	5/17/2021		D⁽¹⁾⁽²⁾		26677	D	⁽¹⁾⁽²⁾	0	I	By Trust ⁽³⁾
Common Stock	5/17/2021		D⁽¹⁾⁽²⁾		15200	D	⁽¹⁾⁽²⁾	0	I	Individual Retirement Account

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:
(1)	On May 17, 2021, Carter Acquisition, Inc., a Delaware corporation ("Merger Sub") and a wholly-owned subsidiary of Carter Intermediate, Inc., a Delaware corporation ("Parent"), merged with and into Aegion Corporation (the "Company"), with the Company continuing as the surviving corporation (the "Merger"), pursuant to the previously announced Agreement and Plan of Merger, dated February 16, 2021 and amended on March 13, 2021 and April 13, 2021 (the "Merger Agreement") among Parent, Merger Sub and the Company.
(2)	Pursuant to the Merger Agreement, at the effective time of the Merger: (a) each outstanding share of Common Stock (each, a "Share"), par value $0.01 per share, of the Company was cancelled and thereafter entitled the Reporting Person to receive $30 in cash without interest and less any applicable tax withholdings (the "Merger Consideration") and (b) each restricted stock unit and deferred stock unit (each a "Stock Unit") outstanding immediately prior to the consummation of the Merger became fully vested (to the extent unvested) and was canceled and converted into the right to receive, for each Share subject to such then-vested Stock Unit, the Merger Consideration.
(3)	Shares held in a trust of reporting person's spouse, to which reporting person is the primary beneficiary.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
CORTINOVIS STEPHEN P 17988 EDISON AVE CHESTERFIELD, MO 63005	X

Signatures
/s/ Mark A. Menghini, as Attorney-in-Fact for Stephen P. Cortinovis		5/19/2021
^**Signature of Reporting Person		Date

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