| Date Filed | Type | Description |
| 02/14/2020 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/19/2019 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/13/2018 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/02/2017 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/16/2016 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 02/12/2013 |
SC 13G/A
| FRANK RONALD L reports a 7.2% stake in ECOLOGY AND ENVIRONMENT, INC. |
| 02/14/2012 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 02/01/2011 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 02/05/2009 |
SC 13G/A
| Form SC 13G/A -- Statement of acquisition of beneficial ownership by individuals [amend] |
| 02/11/2008 |
SC 13G/A
| Form SC 13G/A -- Statement of acquisition of beneficial ownership by individuals [amend] |
| 02/15/2007 |
SC 13G/A
| FRANK RONALD L reports a 7.4% stake in Ecology and Environment, Inc. |
| 02/14/2006 |
SC 13G/A
| FRANK RONALD L reports a 8.3% stake in Ecology and Environment, Inc. |
| 02/13/2004 |
SC 13G/A
| FRANK RONALD L reports a 8% stake in TO RULES 13d-1 AND Ecology and Environment, Inc. |
| 02/18/2003 |
SC 13G/A
| FRANK RONALD L reports a 8.1% stake in Ecology and Environment, Inc. |
| 02/12/2002 |
SC 13G/A
| FRANK RONALD L reports a 8.1% stake in Ecology and Environment, Inc. |
| 02/12/2001 |
SC 13G/A
| FRANK RONALD L reports a 8.7% stake in Ecology and Environment, Inc. |
| 02/14/2000 |
SC 13G
| FRANK RONALD L reports a 9.8% stake in Ecology and Environment, Inc. |
| 03/10/1999 |
SC 13G/A
| FRANK RONALD L reports a 10% stake in Ecology and Environment, Inc. |
| 02/10/1998 |
SC 13G/A
| FRANK RONALD L reports a 10.3% stake in Ecology and Environment, Inc. |
| 02/12/1997 |
SC 13G/A
| FRANK RONALD L reports a 10.8% stake in Ecology and Environment, Inc. |
| 02/14/1996 |
SC 13G/A
| FRANK RONALD L reports a 10.6% stake in Ecology and Environment, Inc. |
| 02/13/1995 |
SC 13G/A
| FRANK RONALD L reports a 10.4% stake in Ecology and Environment, Inc. |