EXHIBIT 21
ROCK-TENN COMPANY
SUBSIDIARIES OF ROCK-TENN COMPANY
| Alliance Display Company of Canada | Nova Scotia, Canada | |
| Dominion Paperboard Products Ltd. | Quebec, Canada | |
| Ling Industries, Inc. | Quebec, Canada | |
| Ling Quebec, Inc. | Quebec, Canada | |
| PCPC, Inc. | California | |
| Pro-Tec Partitions, Inc. | Pennsylvania | |
| Rock-Tenn Astra, LLC | Georgia | |
| Rock-Tenn Canada Holdings, Inc. | Georgia | |
| Rock-Tenn Company of Canada | Nova Scotia, Canada | |
| Rock-Tenn Company of Canada III | Nova Scotia, Canada | |
| Rock-Tenn Company of Texas | Georgia | |
| Rock-Tenn Converting Company | Georgia | |
| Rock-Tenn Financial, Inc. | Delaware | |
| Rock-Tenn Leasing Company, LLC | Georgia | |
| Rock-Tenn Mill Company, LLC | Georgia | |
| Rock-Tenn Partition Company | Georgia | |
| Rock-Tenn Services Inc. | Georgia | |
| Rock-Tenn Shared Services, LLC | Georgia | |
| Rock-Tenn XL, LLC | Georgia | |
| RTS Packaging Canada Inc. | Nova Scotia, Canada | |
| RTS Embalajes de Argentina | Argentina | |
| RTS Embalajes De Chile Limitada | Chile | |
| RTS Empaques, S. De R.L. de CV | Mexico | |
| RTS Packaging Foreign Holdings, LLC | Georgia | |
| Southern Container Corp. | Delaware | |
| TenCorr Containerboard Inc. | Nevada | |
| Preflex, LLC | Delaware | |
| Solvay Paperboard LLC | Delaware | |
| Waldorf Corporation | Delaware | |
| Wilco Inc. | Quebec, Canada |