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 OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * FIRST RESERVE GP X INC   2. Issuer Name and Ticker or Trading Symbol CHART INDUSTRIES INC [GTLS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner _____ Officer (give title below) __X__ Other (specify below) See Remark 1 (Last) (First) (Middle) ONE LAFAYETTE PLACE, THIRD FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 03/19/2007 (Street) GREENWICH, CT 06830 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 03/19/2007   J(1)   2,666 (1) D (1) 12,381,546 (2) I (3) (4) See Footnote (3) (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
FIRST RESERVE GP X INC ONE LAFAYETTE PLACE THIRD FLOOR GREENWICH, CT 06830	X	X		See Remark 1
FIRST RESERVE FUND X LP ONE LAFAYETTE PLACE THIRD FLOOR GREENWICH, CT 06830	X	X		See Remark 1
FIRST RESERVE GP X LP ONE LAFAYETTE PLACE THIRD FLOOR GREENWICH, CT 06830	X	X		See Remark 1

Signatures

Anne E. Gold, Authorized Person, In Capacity as Described in Remark (2)		03/20/2007
**Signature of Reporting Person		Date
Anne E. Gold, In Capacity as Described in Remark (2)		03/20/2007
**Signature of Reporting Person		Date
Anne E. Gold, In Capacity as Described in Remark (2)		03/20/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The 2,666 unvested restricted stock units as reported herein were forfeited to the Issuer by Ben A. Guill as a result of his March 19, 2007 resignation from the Board of Directors of the Issuer.
(2)	Consists of 12,376,214 shares of common stock held by FR X Chart Holdings LLC, and 5,332 aggregate restricted stock units granted to Timothy H. Day and Kenneth W. Moore.
(3)	Each Reporting Person disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Additionally, pursuant to Rule 16a-1(a)(4) of the Securities Exchange Act of 1934, each Reporting Person states that this filing shall not be deemed an admission that such Reporting Person is the beneficial owner of any of the securities reported herein.
(4)	This Form 4 is filed on behalf of First Reserve GP X, Inc. ("GP X Inc."), First Reserve GP X, L.P. ("GP X"), and First Reserve Fund X, L.P. ("Fund X"). Other than the 5,332 aggregate restricted stock units held by Messrs. Day and Moore, these securities are directly owned by FR X Chart Holdings LLC ("Holdings"). Fund X is the sole member of Holdings. Each of the Reporting Persons may be deemed to share beneficial ownership over all such securities. GP X is the general partner of Fund X, and GP X Inc. is the general partner of GP X. The Reporting Persons are entitled to a portion of the profits from the sale of Issuer securities held by Messrs. Day and Moore, and therefore the Reporting Persons may be deemed to share beneficial ownership of the 5,332 restricted stock units.
Remarks: (1) The Reporting Persons have included the designation of "Director" in order to satisfy potential filing obligations in the event any such Reporting Persons are deemed to be a director of the Issuer by deputization. (2) First Reserve GP X, Inc., by Anne E. Gold, Secretary, is signing for itself as the designated filer, as well as in the capacity of general partner of First Reserve GP X, L.P.  First Reserve GP X, L.P., by Anne E. Gold, is signing in its capacity as general partner of First Reserve Fund X, L.P.

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