| SC 13G | 2012-04-09 | Park West Asset Management LLC | RENTECH INC /CO/ | 11,347,503 | 5.0% | EDGAR |
| SC 13G | 2012-02-10 | VANGUARD GROUP INC | RENTECH INC /CO/ | 11,970,851 | 5.3% | EDGAR |
| SC 13G/A | 2012-02-08 | BlackRock Inc. | RENTECH INC /CO/ | 12,841,335 | 5.7% | EDGAR |
| SC 13G/A | 2011-11-10 | BLACKROCK ADVISORS LLC | RENTECH INC /CO/ | 16,612,430 | 7.4% | EDGAR |
| SC 13G/A | 2011-11-10 | BlackRock Inc. | RENTECH INC /CO/ | 16,612,430 | 7.4% | EDGAR |
| SC 13G/A | 2011-08-26 | BlackRock Inc. | RENTECH INC /CO/ | 28,572,196 | 12.9% | EDGAR |
| SC 13G/A | 2011-02-14 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 7,331,513 | 3.3% | EDGAR |
| SC 13G/A | 2011-01-10 | BlackRock Inc. | RENTECH INC /CO/ | 28,572,196 | 17.2% | EDGAR |
| SC 13G/A | 2010-02-12 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 11,251,740 | 5.2% | EDGAR |
| SC 13G/A | 2010-01-08 | BlackRock Inc. | RENTECH INC /CO/ | 20,617,183 | 12.4% | EDGAR |
| SC 13G/A | 2009-09-10 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 12,955,690 | 6.3% | EDGAR |
| SC 13G/A | 2009-07-10 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 21,248,690 | 12.5% | EDGAR |
| SC 13D/A | 2009-03-24 | ASSET MANAGERS INTERNATIONAL LTD. | RENTECH INC /CO/ | 7,876,468 | 4.7% | EDGAR |
| SC 13G/A | 2009-02-17 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 11,345,238 | 6.8% | EDGAR |
| SC 13G/A | 2009-02-10 | BlackRock Inc. | RENTECH INC /CO/ | 18,015,872 | 10.9% | EDGAR |
| SC 13G | 2009-02-05 | BARCLAYS GLOBAL INVESTORS NA /CA/ | RENTECH INC /CO/ | 6,247,387 | 3.8% | EDGAR |
| SC 13G/A | 2008-03-03 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 16,787,878 | 10.1% | EDGAR |
| SC 13G/A | 2008-03-03 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 16,177,821 | 9.7% | EDGAR |
| SC 13G/A | 2008-02-14 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 16,070,021 | 9.7% | EDGAR |
| SC 13G/A | 2008-02-11 | WELLINGTON MANAGEMENT CO LLP | RENTECH INC /CO/ | 16,680,078 | 10.1% | EDGAR |