Initial Statement of Beneficial Ownership (Form 3)

FORM 3

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

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(Print or Type Responses)

1. Name and Address of Reporting Person * Durham Mark 2. Date of Event Requiring Statement (Month/Day/Year) 05/31/2025 3. Issuer Name and Ticker or Trading Symbol CHART INDUSTRIES INC [GTLS] (Last) (First) (Middle) 2200 AIRPORT INDUSTRIAL DRIVE, SUITE 100 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Accounting Officer 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) BALL GROUND, GA 30107 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common stock, par value $0.01 per share 1,330(1) D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(2)	01/02/2034	Common Stock	560	$135.22	D
Stock Option (Right to Buy)	(3)	01/02/2035	Common Stock	400	$189.88	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Durham Mark 2200 AIRPORT INDUSTRIAL DRIVE, SUITE 100 BALL GROUND, GA 30107			Chief Accounting Officer

Signatures

/s/ Mark Durham, by Gregory J. Dziak, his attorney-in-fact		06/13/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Total includes 160 unvested restricted stock units ("RSUs") granted on January 2, 2025 pursuant to the Chart Industries, Inc. 2024 Omnibus Equity Plan (the "2024 Plan"), 154 unvested RSUs granted on January 2, 2024 and 467 unvested RSUs granted on November 10, 2023, pursuant to the Chart Industries, Inc. 2017 Omnibus Equity Plan (the "2017 Plan") in exempt transactions under Rule 16b-3. Shares of common stock will be issued with respect to one-third (1/3) of the total number of shares on each of the three anniversaries of the date of grant, subject to tax withholding requirements.
(2)	These options were granted on January 2, 2024 pursuant to the 2017 Plan in an exempt transaction under Rule 16b-3. These options vest with respect to one-fourth (1/4) of the total number of shares of common stock underlying the stock options on each of the first four anniversaries of the date of grant.
(3)	These options were granted on January 2, 2025 pursuant to the 2024 Plan in an exempt transaction under Rule 16b-3. These options vest with respect to one-fourth (1/4) of the total number of shares of common stock underlying the stock options on each of the first four anniversaries of the date of grant.
Remarks: Exhibit 24.1 - Power of Attorney

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