RADISYS CORPORATION (RSYS)
|
(Name of Issuer)
|
Common Stock
|
(Title of Class of Securities)
|
750459109
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(CUSIP Number)
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(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
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September 21, 2010
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(Date of Event which Requires Filing of this Statement)
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1
|
NAME OF REPORTING PERSONS
|
|||
The D3 Family Fund, L.P.
|
||||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
|||
(a) x
|
||||
(b) o
|
||||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS (See Instructions)
|
|||
WC
|
||||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) o
|
|||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
|
|||
Washington
|
||||
NUMBER OF
|
7
|
SOLE VOTING POWER
|
||
SHARES
|
0
|
|||
BENEFICIALLY
|
||||
OWNED BY
|
8
|
SHARED VOTING POWER
|
||
EACH
|
727,510 Common shares (3.0%)
|
|||
REPORTING
|
||||
PERSON
|
9
|
SOLE DISPOSITIVE POWER
|
||
WITH
|
0
|
|||
10
|
SHARED DISPOSITIVE POWER
|
|||
727,510
|
||||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|||
For the reporting person listed on this page, 727,510; for all reporting persons as a group, 4,527,463 shares (18.7%)
|
||||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)
|
|||
™
|
||||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
|
|||
For the reporting person listed on this page, 3.0%; for all reporting persons as a group, 18.7%.
|
||||
14
|
TYPE OF REPORTING PERSON (See Instructions)
|
|||
PN
|
1
|
NAME OF REPORTING PERSONS
|
|||
The D3 Family Bulldog Fund, L.P.
|
||||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
|||
(a) x
|
||||
(b) o
|
||||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS (See Instructions)
|
|||
WC
|
||||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) o
|
|||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
|
|||
Washington
|
||||
NUMBER OF
|
7
|
SOLE VOTING POWER
|
||
SHARES
|
0
|
|||
BENEFICIALLY
|
||||
OWNED BY
|
8
|
SHARED VOTING POWER
|
||
EACH
|
2,742,682 common shares (11.3%)
|
|||
REPORTING
|
||||
PERSON
|
9
|
SOLE DISPOSITIVE POWER
|
||
WITH
|
0
|
|||
10
|
SHARED DISPOSITIVE POWER
|
|||
2,742,682
|
||||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|||
For the reporting person listed on this page, 2,742,682 shares; for all reporting persons as a group, 4,527,463 shares (18.7%)
|
||||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)
|
|||
™
|
||||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
|
|||
For the reporting person listed on this page, 11.3%; for all reporting persons as a group, 18.7%.
|
||||
14
|
TYPE OF REPORTING PERSON
|
|||
PN
|
1
|
NAME OF REPORTING PERSONS
|
|||
The D3 Family Canadian Fund, L.P.
|
||||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
|||
(c) x
|
||||
(d) o
|
||||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS (See Instructions)
|
|||
WC
|
||||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) o
|
|||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
|
|||
Washington
|
||||
NUMBER OF
|
7
|
SOLE VOTING POWER
|
||
SHARES
|
0
|
|||
BENEFICIALLY
|
||||
OWNED BY
|
8
|
SHARED VOTING POWER
|
||
EACH
|
256,095 common shares (1.1%)
|
|||
REPORTING
|
||||
PERSON
|
9
|
SOLE DISPOSITIVE POWER
|
||
WITH
|
0
|
|||
10
|
SHARED DISPOSITIVE POWER
|
|||
256,095
|
||||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|||
For the reporting person listed on this page, 256,095 shares; for all reporting persons as a group, 4,527,463 shares (18.7%)
|
||||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)
|
|||
™
|
||||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
|
|||
For the reporting person listed on this page, 1.1%; for all reporting persons as a group, 18.7%.
|
||||
14
|
TYPE OF REPORTING PERSON
|
|||
PN
|
1
|
NAME OF REPORTING PERSONS
|
|||
The DIII Offshore Fund, L.P.
|
||||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
|||
(a) x
|
||||
(b) o
|
||||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS (See Instructions)
|
|||
WC
|
||||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) o
|
|||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
|
|||
Bahamas
|
||||
NUMBER OF
|
7
|
SOLE VOTING POWER
|
||
SHARES
|
0
|
|||
BENEFICIALLY
|
||||
OWNED BY
|
8
|
SHARED VOTING POWER
|
||
EACH
|
801,176 common shares (3.3%)
|
|||
REPORTING
|
||||
PERSON
|
9
|
SOLE DISPOSITIVE POWER
|
||
WITH
|
0
|
|||
10
|
SHARED DISPOSITIVE POWER
|
|||
801,176
|
||||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|||
For the reporting person listed on this page, 801,176 shares; for all reporting persons as a group, 4,527,463 shares (18.7%)
|
||||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)
|
|||
™
|
||||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
|
|||
For the reporting person listed on this page, 3.3%; for all reporting persons as a group, 18.7%.
|
||||
14
|
TYPE OF REPORTING PERSON
|
|||
PN
|
1
|
NAME OF REPORTING PERSONS
|
|||
Nierenberg Investment Management Company, Inc.
|
||||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
|||
(a) x
|
||||
(b) o
|
||||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS (See Instructions)
|
|||
WC
|
||||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) o
|
|||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
|
|||
Washington
|
||||
NUMBER OF
|
7
|
SOLE VOTING POWER
|
||
SHARES
|
0
|
|||
BENEFICIALLY
|
||||
OWNED BY
|
8
|
SHARED VOTING POWER
|
||
EACH
|
4,527,463 shares (18.7%)
|
|||
REPORTING
|
||||
PERSON
|
9
|
SOLE DISPOSITIVE POWER
|
||
WITH
|
0
|
|||
10
|
SHARED DISPOSITIVE POWER
|
|||
4,527,463 shares
|
||||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|||
For the reporting person listed on this page, 4,527,463; for all reporting persons as a group, 4,527,463 shares (18.7 %)
|
||||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)
|
|||
™
|
||||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
|
|||
For the reporting person listed on this page, 18.7%; for all reporting persons as a group, 18.7%.
|
||||
14
|
TYPE OF REPORTING PERSON
|
|||
CO
|
1
|
NAME OF REPORTING PERSONS
|
|||
Nierenberg Investment Management Offshore, Inc.
|
||||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
|||
(a) x
|
||||
(b) o
|
||||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS (See Instructions)
|
|||
WC
|
||||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) o
|
|||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
|
|||
Bahamas
|
||||
NUMBER OF
|
7
|
SOLE VOTING POWER
|
||
SHARES
|
0
|
|||
BENEFICIALLY
|
||||
OWNED BY
|
8
|
SHARED VOTING POWER
|
||
EACH
|
801,176 common shares (3.3%)
|
|||
REPORTING
|
||||
PERSON
|
9
|
SOLE DISPOSITIVE POWER
|
||
WITH
|
0
|
|||
10
|
SHARED DISPOSITIVE POWER
|
|||
801,176 common shares
|
||||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|||
For the reporting person listed on this page, 801,176 shares; for all reporting persons as a group, 4,527,463 shares (18.7%)
|
||||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)
|
|||
™
|
||||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
|
|||
For the reporting person listed on this page, 3.3%; for all reporting persons as a group, 18.7%.
|
||||
14
|
TYPE OF REPORTING PERSON
|
|||
CO
|
1
|
NAME OF REPORTING PERSONS
|
|||
David Nierenberg
|
||||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
|
|||
(a) x
|
||||
(b) o
|
||||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS (See Instructions)
|
|||
AF
|
||||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) o
|
|||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
|
|||
United States of America
|
||||
NUMBER OF
|
7
|
SOLE VOTING POWER
|
||
SHARES
|
0
|
|||
BENEFICIALLY
|
||||
OWNED BY
|
8
|
SHARED VOTING POWER
|
||
EACH
|
4,527,463 common shares (18.7%)
|
|||
REPORTING
|
||||
PERSON
|
9
|
SOLE DISPOSITIVE POWER
|
||
WITH
|
0
|
|||
10
|
SHARED DISPOSITIVE POWER
|
|||
4,527,463
|
||||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|||
For the reporting person listed on this page, 4,527,463; for all reporting persons as a group, 4,527,463 shares (18.7%)
|
||||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)
|
|||
™
|
||||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
|
|||
For the reporting person listed on this page, 18.7%; for all reporting persons as a group, 18.7%
|
||||
14
|
TYPE OF REPORTING PERSON
|
|||
IN
|
Item 2.
|
Identity and Background.
|
Item 3.
|
Source and Amount of Funds or Other Consideration
|
Item 4.
|
Purpose of Transaction
|
Item 5.
|
Interest in Securities of the Issuer.
|
Item 7.
|
Material to be filed as Exhibits
|
D3 Family Fund, L.P., D3 Family Bulldog Fund, L.P., and D3 Family Canadian Fund, L.P.
|
||
By:
|
Nierenberg Investment Management Company, Inc.
|
|
Its:
|
General Partner
|
|
September 21, 2010
|
By:
|
/s/ David Nierenberg
|
David Nierenberg, President
|
||
DIII Offshore Fund, L.P.
|
||
By:
|
Nierenberg Investment Management Offshore, Inc.
|
|
Its:
|
General Partner
|
|
September 21, 2010
|
By:
|
/s/ David Nierenberg
|
David Nierenberg, President
|
||
Nierenberg Investment Management Company, Inc.
|
||
September 21, 2010
|
By:
|
/s/ David Nierenberg
|
David Nierenberg, President
|
||
Nierenberg Investment Management Offshore, Inc.
|
||
September 21, 2010
|
By:
|
/s/ David Nierenberg
|
David Nierenberg, President
|
||
September 21, 2010
|
/s/ David Nierenberg
|
|
David Nierenberg
|