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
OMB APPROVAL
OMB Number: 3235-0104
Expires: December 31, 2014
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person *
Durham Mark
(Last) (First) (Middle)
2200 AIRPORT INDUSTRIAL DRIVE, SUITE 100
(Street)
BALL GROUND GA 30107
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
05/31/2025 		3. Issuer Name and Ticker or Trading Symbol
CHART INDUSTRIES INC [ GTLS ]
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 of Original Filed (Month/Day/Year)
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 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
 
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: 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  
Explanation of Responses:
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
/s/ Mark Durham, by Gregory J. Dziak, his attorney-in-fact 06/13/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

EX-24.1