Cowen Investment Management LLC
Related Filers (45)
- COHEN PETER A (83)
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- STARK MORGAN B (83)
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- RAMIUS ADVISORS LLC (82)
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- IMMERSION CORP (48)
- PHOENIX TECHNOLOGIES LTD (40)
- Ramius Navigation Master Fund Ltd (29)
- RAMIUS MULTI-STRATEGY MASTER FUND LTD (26)
- Essex Rental Corp. (20)
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- SURMODICS INC (6)
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- RAMIUS CREDIT OPPORTUNITIES MASTER FUND LTD (4)
- TOLLGRADE COMMUNICATIONS INC \PA\ (4)
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- BEACON POWER CORP (3)
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Other (43)
13F-HR
Monday, 11/13/2023
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Tuesday, 8/15/2023
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Thursday, 5/11/2023
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Monday, 2/13/2023
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Monday, 11/14/2022
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR/A
Wednesday, 8/10/2022
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Tuesday, 8/9/2022
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Monday, 5/16/2022
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Friday, 2/11/2022
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Monday, 11/15/2021
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Wednesday, 8/11/2021
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Friday, 5/14/2021
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Friday, 2/12/2021
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Thursday, 11/12/2020
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Wednesday, 8/12/2020
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Thursday, 5/14/2020
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Friday, 2/14/2020
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Friday, 11/15/2019
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-NT
Wednesday, 8/14/2019
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 5/14/2019
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Wednesday, 2/13/2019
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 11/13/2018
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 8/14/2018
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 5/15/2018
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Thursday, 2/15/2018
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Thursday, 8/15/2013
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Wednesday, 5/15/2013
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 2/12/2013
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 11/13/2012
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 8/14/2012
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 5/15/2012
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Tuesday, 2/14/2012
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-NT
Monday, 11/14/2011
Initial Quarterly Form 13F Notice Report filed by institutional managers
13F-HR
Tuesday, 8/16/2011
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Monday, 5/16/2011
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Monday, 2/14/2011
Initial Quarterly Form 13F Holdings Report filed by institutional managers
CORRESP
Tuesday, 2/8/2011
A correspondence can be sent as a document with another submission type or can be sent as a separate submission.
13F-HR
Monday, 11/15/2010
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Friday, 8/13/2010
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Thursday, 5/13/2010
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Tuesday, 2/16/2010
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR/A
Wednesday, 12/2/2009
Initial Quarterly Form 13F Holdings Report filed by institutional managers
13F-HR
Monday, 11/16/2009
Initial Quarterly Form 13F Holdings Report filed by institutional managers
Ownership (258)
SC 13D/A
Thursday, 3/17/2011
IMMERSION CORP: Major Shareholders
SC 13D/A
Friday, 3/11/2011
IMMERSION CORP: Major Shareholders
SC 13D/A
Wednesday, 3/9/2011
ZORAN CORP \DE\: Major Shareholders
SC 13D/A
Monday, 2/14/2011
EXTREME NETWORKS INC: Major Shareholders
SC 13G/A
Thursday, 2/10/2011
POWERWAVE TECHNOLOGIES INC: Major Shareholders
SC 13G/A
Thursday, 2/10/2011
BEACON POWER CORP: Major Shareholders
SC 13D/A
Monday, 2/7/2011
AVIAT NETWORKS, INC.: Major Shareholders
SC 13G/A
Friday, 1/28/2011
Rand Logistics, Inc.: Major Shareholders
SC 13G/A
Monday, 1/24/2011
Rand Logistics, Inc.: Major Shareholders
4
Monday, 1/24/2011
Rand Logistics, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 1/24/2011
Rand Logistics, Inc.: Statement of changes in beneficial ownership of securities
SC 13D/A
Wednesday, 1/19/2011
AVIAT NETWORKS, INC.: Major Shareholders
SC 13G/A
Wednesday, 1/19/2011
Essex Rental Corp.: Major Shareholders
SC 13D/A
Thursday, 1/13/2011
ZORAN CORP \DE\: Major Shareholders
4
Friday, 1/7/2011
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4
Friday, 1/7/2011
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
SC 13D/A
Thursday, 1/6/2011
SURMODICS INC: Major Shareholders
SC 13D/A
Monday, 1/3/2011
IMMERSION CORP: Major Shareholders
SC 13D/A
Wednesday, 12/29/2010
ZORAN CORP \DE\: Major Shareholders
SC 13D/A
Wednesday, 12/22/2010
IMMERSION CORP: Major Shareholders
4
Wednesday, 12/22/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Wednesday, 12/22/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Tuesday, 12/21/2010
AVIAT NETWORKS, INC.: Major Shareholders
SC 13D/A
Friday, 12/17/2010
SEACHANGE INTERNATIONAL INC: Major Shareholders
4
Friday, 12/17/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Friday, 12/17/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Thursday, 12/16/2010
IMMERSION CORP: Major Shareholders
4
Wednesday, 12/15/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Wednesday, 12/15/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Tuesday, 12/14/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4
Tuesday, 12/14/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4
Monday, 12/13/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Monday, 12/13/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Monday, 12/6/2010
ZORAN CORP \DE\: Major Shareholders
4
Friday, 12/3/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4
Friday, 12/3/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
SC 13D/A
Wednesday, 11/24/2010
PHOENIX TECHNOLOGIES LTD: Major Shareholders
3
Wednesday, 11/24/2010
SURMODICS INC: Initial statement of beneficial ownership of securities
3
Wednesday, 11/24/2010
SURMODICS INC: Initial statement of beneficial ownership of securities
4
Wednesday, 11/24/2010
PHOENIX TECHNOLOGIES LTD: Statement of changes in beneficial ownership of securities
4
Wednesday, 11/24/2010
PHOENIX TECHNOLOGIES LTD: Statement of changes in beneficial ownership of securities
SC 13D/A
Thursday, 11/18/2010
ZORAN CORP \DE\: Major Shareholders
SC 13D
Wednesday, 11/17/2010
SURMODICS INC: Major Shareholders
SC 13D/A
Tuesday, 11/9/2010
ACTEL CORP: Major Shareholders
4
Monday, 11/8/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Monday, 11/8/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D
Monday, 11/1/2010
ZORAN CORP \DE\: Major Shareholders
SC 13D/A
Monday, 11/1/2010
IMMERSION CORP: Major Shareholders
4
Monday, 11/1/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Monday, 11/1/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Thursday, 10/28/2010
MICROTUNE INC: Major Shareholders
SC 13D/A
Wednesday, 10/27/2010
ANALOGIC CORP: Major Shareholders
SC 13D/A
Wednesday, 10/27/2010
ANALOGIC CORP: Major Shareholders
4
Friday, 10/22/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Friday, 10/22/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Thursday, 10/21/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Thursday, 10/21/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Friday, 10/15/2010
EXTREME NETWORKS INC: Major Shareholders
SC 13D/A
Tuesday, 10/5/2010
ACTEL CORP: Major Shareholders
SC 13D/A
Monday, 9/20/2010
CYPRESS BIOSCIENCE INC: Major Shareholders
SC 13D/A
Thursday, 9/16/2010
CYPRESS BIOSCIENCE INC: Major Shareholders
SC 13D/A
Thursday, 9/16/2010
AVIAT NETWORKS, INC.: Major Shareholders
SC 13D/A
Tuesday, 9/14/2010
SEACHANGE INTERNATIONAL INC: Major Shareholders
SC 13D/A
Friday, 9/3/2010
PHOENIX TECHNOLOGIES LTD: Major Shareholders
SC 13D/A
Thursday, 8/12/2010
AVIAT NETWORKS, INC.: Major Shareholders
SC 13D/A
Thursday, 8/12/2010
CYPRESS BIOSCIENCE INC: Major Shareholders
4
Monday, 8/9/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Monday, 8/9/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Friday, 8/6/2010
CYPRESS BIOSCIENCE INC: Major Shareholders
4
Thursday, 8/5/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Thursday, 8/5/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Thursday, 7/29/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Thursday, 7/29/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Thursday, 7/22/2010
CYPRESS BIOSCIENCE INC: Major Shareholders
SC 13D/A
Thursday, 7/22/2010
EXTREME NETWORKS INC: Major Shareholders
SC 13D
Monday, 7/19/2010
CYPRESS BIOSCIENCE INC: Major Shareholders
SC 13D
Wednesday, 7/7/2010
AVIAT NETWORKS, INC.: Major Shareholders
4
Wednesday, 7/7/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4
Wednesday, 7/7/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4/A
Wednesday, 7/7/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4/A
Wednesday, 7/7/2010
Essex Rental Corp.: Statement of changes in beneficial ownership of securities
4
Thursday, 7/1/2010
Rand Logistics, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 7/1/2010
Rand Logistics, Inc.: Statement of changes in beneficial ownership of securities
SC 13D
Wednesday, 6/23/2010
EXTREME NETWORKS INC: Major Shareholders
SC 13D/A
Tuesday, 6/8/2010
SEACHANGE INTERNATIONAL INC: Major Shareholders
SC 13D/A
Monday, 5/24/2010
IMMERSION CORP: Major Shareholders
4
Tuesday, 5/4/2010
PHOENIX TECHNOLOGIES LTD: Statement of changes in beneficial ownership of securities
4
Tuesday, 5/4/2010
PHOENIX TECHNOLOGIES LTD: Statement of changes in beneficial ownership of securities
4
Tuesday, 5/4/2010
TOLLGRADE COMMUNICATIONS INC \PA\: Statement of changes in beneficial ownership of securities
4
Tuesday, 5/4/2010
TOLLGRADE COMMUNICATIONS INC \PA\: Statement of changes in beneficial ownership of securities
4
Tuesday, 5/4/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Tuesday, 5/4/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Monday, 5/3/2010
AGILYSYS INC: Major Shareholders
4
Monday, 5/3/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Monday, 5/3/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Thursday, 4/29/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Thursday, 4/29/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
SC 13D/A
Wednesday, 4/28/2010
AGILYSYS INC: Major Shareholders
4
Tuesday, 4/27/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
4
Tuesday, 4/27/2010
IMMERSION CORP: Statement of changes in beneficial ownership of securities
Prospectus (3)
SC TO-T/A
Tuesday, 9/21/2010
Third party tender offer statement
SC TO-T/A
Monday, 9/20/2010
Third party tender offer statement
SC TO-T
Wednesday, 9/15/2010
Third party tender offer statement
Proxies (17)
DFAN14A
Monday, 2/28/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Thursday, 2/24/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Tuesday, 2/22/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Friday, 2/11/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Friday, 2/11/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Tuesday, 2/1/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Monday, 1/31/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Friday, 1/21/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Friday, 1/21/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Wednesday, 1/19/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Friday, 1/7/2011
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Monday, 12/13/2010
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Tuesday, 12/7/2010
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Monday, 12/6/2010
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Wednesday, 11/17/2010
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Thursday, 8/5/2010
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material
DFAN14A
Friday, 11/13/2009
Definitive additional proxy soliciting materials filed by non-management including Rule 14(a)(12) material