X0202 4 2007-05-23 0 0000892553 CHART INDUSTRIES INC GTLS 0001274073 FIRST RESERVE GP X INC ONE LAFAYETTE PLACE THIRD FLOOR GREENWICH CT 06830 1 0 1 1 See Remark 1 0001274075 FIRST RESERVE FUND X LP ONE LAFAYETTE PLACE THIRD FLOOR GREENWICH CT 06830 1 0 1 1 See Remark 1 0001274074 FIRST RESERVE GP X LP ONE LAFAYETTE PLACE THIRD FLOOR GREENWICH CT 06830 1 0 1 1 See Remark 1 Common Stock 2007-05-23 4 A 0 3574 A 12385120 I See Footnote Consists of restricted stock units granted by the Issuer under its Amended and Restated 2005 Stock Incentive Plan. Consists of 1,787 restricted stock units granted to each of Timothy H. Day and Kenneth W. Moore by the Issuer under its Amended and Restated 2005 Stock Incentive Plan. Each of Messrs. Day and Moore is a director of the Issuer and an officer of First Reserve GP X Inc. Consists of 12,376,214 shares of common stock held by FR X Chart Holdings LLC, and 8,906 aggregate restricted stock units held by Messrs. Day and Moore. 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 8,906 aggregate restricted stock units held by Messrs. Day and Moore, these securities are directly owned by FR X Chart Holdings LLC ("Holdings"). Each of the Reporting Persons may be deemed to share beneficial ownership over all such securities. Fund X is the sole member of Holdings. GP X is the general partner of Fund X, and GP X Inc. is the general partner of GP X. The Reporting Persons are entitiled 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 8,906 restricted stock units. Each Reporting Person disclaims beneficial ownership of any of the securities reported herein 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. (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. Anne E. Gold, in the capacity as described in Remark (2) 2007-05-25 Anne E. Gold, In Capacity as Described in Remark (2) 2007-05-25 Anne E. Gold, In Capacity as Described in Remark (2) 2007-05-25