- Albuquerque Wholesale Envelope
- Atlantic Envelope Co
- Central Envelope Co
- Double Envelope
- Envelope Agency
- Envelope Connection
- G V Graphics
- Mail Data
- Mail-Well Envelope
- North Dakota Envelope Co
- Piedmont Envelope Converters
- Shields Printing Inc
- Tension Envelope Corp
- Tri State Envelope
- Vision Envelope-Raleigh Inc