0000902664-09-000310 3 1 20090202 20090204 20090204 ADAGE CAPITAL PARTNERS LP 0001163846 3 34 001-32410 09568421 200 CLARENDON STREET 52ND FLOOR BOSTON MA 02116 617-867-2800 ADAGE CAPITAL PARTNERS GP LLC 0001165408 DE 1231 3 34 001-32410 09568422 200 CLARENDON STREET 52ND FLOOR BOSTON MA 02116 6178672800 Atchinson Robert 0001403404 3 34 001-32410 09568419 617-867-2800 200 CLARENDON STREET 52ND FLOOR BOSTON MA 02116 Gross Phillip 0001403413 3 34 001-32410 09568418 617-867-2800 200 CLARENDON STREET 52ND FLOOR BOSTON MA 02116 Celanese CORP 0001306830 2820 980420726 DE 1231 1601 W. LBJ FREEWAY DALLAS TX 75234 972-443-4000 1601 W. LBJ FREEWAY DALLAS TX 75234 Blackstone Crystal Holdings Capital Partners (Cayman) IV Ltd. 20041022 Adage Capital Advisors, L.L.C. 0001403403 DE 1231 3 34 001-32410 09568420 200 CLARENDON STREET 52ND FLOOR BOSTON MA 02116 617-867-2800 200 CLARENDON STREET 52ND FLOOR BOSTON MA 02116 3 1 p09-0234form3_ex.xml FORM 3 OMB APPROVAL UNITED STATES SECURITIES AND EXCHANGE COMMISSION OMB Number: Washington, D.C. 20549 3235-0104 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF Estimated SECURITIES 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 2. Date of Event 3. Issuer Name and Ticker or Trading Person * Requiring Symbol ADAGE CAPITAL PARTNERS GP LLC Statement Celanese CORP [CE] (MM/DD/YYYY) 2/2/2009 (Last) (First) (Middle) 4. Relationship of Reporting Person(s) to Issuer (Check 200 CLARENDON STREET, 52ND FLOOR all applicable) _____ Director ___X___ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Street) 5. If Amendment, 6. Individual or Joint/Group BOSTON, MA 02116 Date Original Filing(Check Applicable Line) (City) (State) (Zip) Filed(MM/DD/YYYY) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person Table I - Non-Derivative Securities Beneficially Owned 1.Title of Security 2. Amount of 3. 4. Nature of Indirect (Instr. 4) Securities Ownership Beneficial Ownership Beneficially Form: (Instr. 5) Owned Direct (Instr. 4) (D) or Indirect (I) (Instr. 5) Series A Common Stock, $0.0001 13588774 I See Footnote (1) par value ("Common Stock") Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) 1. Title of Derivate 2. Date Exercisable 3. Title and Amount 4. 5. 6. Nature of Indirect Security and Expiration Date of Securities Conversion Ownership Beneficial Ownership (Instr. 4) (MM/DD/YYYY) Underlying or Form of (Instr. 5) Derivative Security Exercise Derivative (Instr. 4) Price of Security: Derivative Direct (D) Security or Indirect (I) Date Expiration Title Amount or (Instr. 5) Exercisable Date Number of Shares Convertible Preferred 2/2/2009 (2) Common 1001675 (2) I See Stock, ("Preferred Stock") Stock Footnotes (1) (2) Explanation of Responses: (1) The shares of Common Stock and Preferred Stock to which this note relates are held directly by Adage Capital Partners, L.P., a Delaware limited partnership (the "Fund"). Adage Capital Partners GP, L.L.C., a Delaware limited liability company ("ACPGP"), serves as the general partner of the Fund and as such has discretion over the portfolio securities beneficially owned by the Fund. Adage Capital Advisors, L.L.C., a Delaware limited liability company ("ACA"), is the managing member of ACPGP and directs ACPGP's operations. Robert Atchinson and Phillip Gross are the managing members of ACPGP and ACA and general partners of ACP. ACPGP, ACA, Robert Atchinson and Phillip Gross disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein. (2) The Preferred Stock to which this note relates is convertible at any time, at the option of the holder, into approximately 1.25 shares of Common Stock. The conversion right of the Preferred Stock to Common Stock has no expiration date. Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other ADAGE CAPITAL PARTNERS GP LLC 200 CLARENDON STREET X 52ND FLOOR BOSTON, MA 02116 ADAGE CAPITAL PARTNERS LP 200 CLARENDON STREET X 52ND FLOOR BOSTON, MA 02116 Adage Capital Advisors, L.L.C. 200 CLARENDON STREET X 52ND FLOOR BOSTON, MA 02116 Atchinson Robert 200 CLARENDON STREET X 52ND FLOOR BOSTON, MA 02116 Gross Phillip 200 CLARENDON STREET X 52ND FLOOR BOSTON, MA 02116 Signatures /s/ Robert Atchinson 2/4/2009 ** Signature of Reporting Person Date /s/ Adage Capital Partners, L.P.; By its general partner Adage Capital Partners GP, L.L.C.; By its managing member Adage Capital 2/4/2009 Advisors, L.L.C.; By its managing member Robert Atchinson ** Signature of Reporting Person Date /s/ Adage Capital Partners GP, L.L.C.; By its managing member Adage Capital Advisors, L.L.C.; By its managing member Robert 2/4/2009 Atchinson ** Signature of Reporting Person Date /s/ Adage Capital Advisors, L.L.C.; By its managing member Robert 2/4/2009 Atchinson ** Signature of Reporting Person Date /s/ Phillip Gross 2/4/2009 ** 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 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). 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 control number.