Initial Statement of Beneficial Ownership (3)

Share Name	Share Symbol	Market	Type
Rentech, Inc.	NASDAQ:RTK	NASDAQ	Common Stock

	Price Change	% Change	Share Price	Bid Price	Offer Price	High Price	Low Price	Open Price	Shares Traded	Last Trade
	0.00	0.00%	0.20	0.195	0.205				0	01:00:00

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated 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 Person ^*

Blackstone Holdings I L.P.

2. Date of Event Requiring Statement (MM/DD/YYYY) 4/9/2014

3. Issuer Name and Ticker or Trading Symbol

RENTECH, INC. [RTK]

(Last) (First) (Middle)

C/O THE BLACKSTONE GROUP, 345 PARK AVENUE

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director ___ X ___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

NEW YORK, NY 10154

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

6. Individual or Joint/Group Filing (Check Applicable Line)

___ 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 (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)

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		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)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	4452839.7748 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽³⁾ ⁽¹²⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	1729862.973 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽⁴⁾ ⁽¹²⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	1731139.8198 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽⁵⁾ ⁽¹²⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	5852021.2162 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽⁶⁾ ⁽¹²⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	3003003.018 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽⁷⁾ ⁽¹¹⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	7262045.7207 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽⁸⁾ ⁽¹¹⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	12951069.4595 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽⁹⁾ ⁽¹²⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾
Series E Convertible Preferred Stock	⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	8063063.0631 ⁽¹⁾ ⁽²⁾	$2.22 ⁽¹⁾ ⁽²⁾	I	See Footnotes ⁽¹⁰⁾ ⁽¹²⁾ ⁽¹³⁾ ⁽¹⁴⁾ ⁽¹⁵⁾ ⁽¹⁶⁾ ⁽¹⁷⁾

Explanation of Responses:
( 1)	The number of shares of Common Stock, par value $0.01 per share (the "Common Stock") of Rentech, Inc. (the "Issuer") issuable upon conversion of Series E Convertible Preferred Stock, par value $10.00 per share (the "Series E Convertible Preferred Stock") of the Issuer is equal to the quotient of (i) the original issue price of $1,000 per share of each such share of Series E Preferred Stock divided by (ii) $2.22, subject to adjustments in the event of a stock split, stock or securities dividend, combination, recapitalization or certain other customary adjustments, with any fractional shares paid in cash. However, no more than an aggregate of 45,045,045 shares of Common Stock can be issued upon such conversion, subject to appropriate adjustment in the event of a stock split, stock dividend, combination or other similar recapitalization. The Series E Convertible Preferred Stock are convertible at any time, and have no expiration date.
( 2)	(Continued from footnote 1) The Issuer may convert all, but not less than all, of the outstanding shares of Series E Preferred Stock to Common Stock at any time after the second anniversary of the original issue date of April 9, 2014, if certain conditions are met.
( 3)	GSO Cactus Credit Opportunities Fund LP directly holds these securities.
( 4)	Steamboat Credit Opportunities Master Fund LP directly holds these securities.
( 5)	GSO Coastline Credit Partners LP directly holds these securities.
( 6)	GSO Aiguille des Grands Montets Fund II LP directly holds these securities.
( 7)	GSO Palmetto Opportunistic Investment Partners LP directly holds these securities. GSO Palmetto Opportunistic Associates LLC is the general partner of GSO Palmetto Opportunistic Investment Partners LP.
( 8)	GSO Credit-A Partners LP directly holds these securities. GSO Credit-A Associates LLC is the general partner of GSO Credit-A Partners LP.
( 9)	GSO Special Situations Fund LP directly holds these securities.
( 10)	GSO Special Situations Overseas Master Fund Ltd directly holds these securities (GSO Special Situations Overseas Master Fund Ltd, together with GSO Cactus Credit Opportunities Fund LP, Steamboat Credit Opportunities Master Fund LP, GSO Coastline Credit Partners LP, GSO Aiguille des Grands Montets Fund II LP, GSO Palmetto Opportunistic Investment Partners LP, GSO Credit-A Partners LP and GSO Special Situations Fund LP, the "GSO Funds").
( 11)	GSO Holdings I L.L.C. is the managing member of each of GSO Palmetto Opportunistic Associates LLC and GSO Credit-A Associates LLC.
( 12)	GSO Capital Partners LP serves as the investment manager of each of GSO Cactus Credit Opportunities Fund LP, Steamboat Credit Opportunities Master Fund LP, GSO Coastline Credit Partners LP, GSO Aiguille des Grands Montets Fund II LP, GSO Special Situations Fund LP and GSO Special Situations Overseas Master Fund Ltd. GSO Advisor Holdings L.L.C. is the general partner of GSO Capital Partners LP.
( 13)	Blackstone Holdings I L.P. is the sole member of each of GSO Holdings I L.L.C. and GSO Advisor Holdings L.L.C. Blackstone Holdings I/II GP Inc. is the general partner of Blackstone Holdings I L.P. The Blackstone Group L.P. is the controlling shareholder of Blackstone Holdings I/II GP Inc. Blackstone Group Management L.L.C. is the general partner of The Blackstone Group L.P. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.
( 14)	In addition, each of Bennett J. Goodman, J. Albert Smith III and Douglas I. Ostrover may be deemed to have shared voting power and/or investment power with respect to the securities held by the GSO Funds. Mr. Ostrover is a member of the board of directors of the Issuer.
( 15)	Due to the limitations of the electronic filing system, GSO Cactus Credit Opportunities Fund LP, Steamboat Credit Opportunities Master Fund LP, GSO Coastline Credit Partners LP, GSO Aiguille des Grands Montets Fund II LP, GSO Palmetto Opportunistic Investment Partners LP, GSO Credit-A Partners LP, GSO Special Situations Fund LP, GSO Special Situations Overseas Master Fund Ltd, GSO Palmetto Opportunistic Associates LLC, GSO Credit-A Associates LLC and Douglas I. Ostrover are filing separate Forms 3.
( 16)	Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.
( 17)	Each of the Reporting Persons (other than each of GSO Funds to the extent they directly hold securities reported herein), disclaims beneficial ownership of the securities held by each of the GSO Funds, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than each of the GSO Funds to the extent they directly hold securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

Remarks:
Exhibit 24.1 - Power of Attorney -Bennett J. Goodman (incorporated by reference from Exhibit B to the Schedule 13D filed by the Reporting Persons on April 21, 2014). Exhibit 24.2 - Power of Attorney - J. Albert Smith III (incorporated by reference from Exhibit C to the Schedule 13D filed by the Reporting Persons on April 21, 2014).

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Blackstone Holdings I L.P. C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK, NY 10154		X
GSO CAPITAL PARTNERS LP 345 PARK AVENUE NEW YORK, NY 10154		X
GSO Advisor Holdings L.L.C. C/O GSO CAPITAL PARTNERS LP 345 PARK AVENUE NEW YORK, NY 10154		X
GSO Holdings I LLC C/O GSO CAPITAL PARTNERS LP 345 PARK AVENUE NEW YORK, NY 10154		X
Blackstone Holdings I/II GP Inc C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK, NY 10154		X
Blackstone Group L.P. 345 PARK AVENUE NEW YORK, NY 10154		X
Blackstone Group Management L.L.C. 345 PARK AVENUE NEW YORK, NY 10154		X
SCHWARZMAN STEPHEN A C/O THE BLACKSTONE GROUP 345 PARK AVE NEW YORK, NY 10154		X
Goodman Bennett J C/O GSO CAPITAL PARTNERS LP 345 PARK AVENUE NEW YORK, NY 10154		X
Smith J Albert III C/O GSO CAPITAL PARTNERS LP 345 PARK AVENUE NEW YORK, NY 10154		X

Signatures
GSO Capital Partners LP, By: /s/ Marisa Beeney, Name: Marisa Beeney, Title: Authorized Signatory		4/21/2014
^** Signature of Reporting Person		Date
GSO Advisor Holdings L.L.C., By: Blackstone Holdings I L.P., its sole member, By: Blackstone Holdings I/II GP Inc., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		4/21/2014
^** Signature of Reporting Person		Date
GSO Holdings I LLC, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		4/21/2014
^** Signature of Reporting Person		Date
Blackstone Holdings I L.P., By: Blackstone Holdings I/II GP Inc., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		4/21/2014
^** Signature of Reporting Person		Date
Blackstone Holdings I/II GP Inc., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		4/21/2014
^** Signature of Reporting Person		Date
The Blackstone Group L.P., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		4/21/2014
^** Signature of Reporting Person		Date
Blackstone Group Management L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		4/21/2014
^** Signature of Reporting Person		Date
Stephen A. Schwarzman, By: /s/ Stephen A. Schwarzman, Name: Stephen A. Schwarzman		4/21/2014
^** Signature of Reporting Person		Date
Bennett J. Goodman, By: /s/ Marisa Beeney, Name: Marisa Beeney, Title: Attorney-in-Fact		4/21/2014
^** Signature of Reporting Person		Date
J. Albert Smith III, By: /s/ Marisa Beeney, Name: Marisa Beeney, Title: Attorney-in-Fact		4/21/2014
^** 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.

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RTK Rentech, Inc.