KNAFEL SIDNEY R
Related Filers (5)
- GENERAL AMERICAN INVESTORS CO INC (18)
- INSIGHT COMMUNICATIONS CO INC (14)
- VirtualScopics, Inc. (10)
- BIORELIANCE CORP (4)
- INTERNATIONAL CABLETEL INC (1)
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Ownership (46)
5
Friday, 2/5/2021
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Friday, 2/7/2020
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Thursday, 2/7/2019
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Tuesday, 1/30/2018
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Thursday, 2/9/2017
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Thursday, 2/11/2016
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Tuesday, 1/27/2015
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Thursday, 2/13/2014
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Thursday, 1/24/2013
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Monday, 3/5/2012
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
5
Tuesday, 1/10/2012
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Thursday, 8/18/2011
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 3/4/2011
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
5
Wednesday, 1/19/2011
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Tuesday, 5/25/2010
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
5
Friday, 1/15/2010
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Friday, 11/13/2009
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 11/6/2009
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
5
Thursday, 1/15/2009
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Tuesday, 10/7/2008
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 4/1/2008
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
5
Wednesday, 1/30/2008
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
5
Wednesday, 1/17/2007
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Monday, 8/14/2006
VirtualScopics, Inc.: Statement of changes in beneficial ownership of securities
3
Friday, 6/9/2006
VirtualScopics, Inc.: Initial statement of beneficial ownership of securities
5
Wednesday, 1/18/2006
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Tuesday, 12/20/2005
INSIGHT COMMUNICATIONS CO INC: Statement of changes in beneficial ownership of securities
SC 13D/A
Thursday, 12/15/2005
INSIGHT COMMUNICATIONS CO INC: Major Shareholders
SC 13D/A
Monday, 11/14/2005
INSIGHT COMMUNICATIONS CO INC: Major Shareholders
SC 13D/A
Friday, 7/29/2005
INSIGHT COMMUNICATIONS CO INC: Major Shareholders
SC 13D
Monday, 3/7/2005
INSIGHT COMMUNICATIONS CO INC: Major Shareholders
5
Tuesday, 1/25/2005
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
4
Wednesday, 6/16/2004
INSIGHT COMMUNICATIONS CO INC: Statement of changes in beneficial ownership of securities
4
Wednesday, 2/11/2004
BIORELIANCE CORP: Statement of changes in beneficial ownership of securities
5
Wednesday, 1/14/2004
GENERAL AMERICAN INVESTORS CO INC: Annual statement of changes in beneficial ownership of securities
SC 13G/A
Tuesday, 1/6/2004
BIORELIANCE CORP: Major Shareholders
4
Wednesday, 12/24/2003
BIORELIANCE CORP: Statement of changes in beneficial ownership of securities
4
Monday, 11/10/2003
INSIGHT COMMUNICATIONS CO INC: Statement of changes in beneficial ownership of securities
SC 13G/A
Thursday, 2/14/2002
INSIGHT COMMUNICATIONS CO INC: Major Shareholders
4
Wednesday, 9/5/2001
INSIGHT COMMUNICATIONS CO INC: Statement of changes in beneficial ownership of securities
4
Wednesday, 8/22/2001
INSIGHT COMMUNICATIONS CO INC: Statement of changes in beneficial ownership of securities
SC 13G
Monday, 2/14/2000
INSIGHT COMMUNICATIONS CO INC: Major Shareholders
4
Tuesday, 8/10/1999
INSIGHT COMMUNICATIONS CO INC: Statement of changes in beneficial ownership of securities
3
Tuesday, 7/20/1999
INSIGHT COMMUNICATIONS CO INC: Initial statement of beneficial ownership of securities
SC 13G
Friday, 2/13/1998
BIORELIANCE CORP: Major Shareholders
SC 13G/A
Monday, 3/10/1997
INTERNATIONAL CABLETEL INC: Major Shareholders