SC 13D/A 1 d73471_sc13d-a.txt AMENDMENT NO. 7 TO SCHEDULE 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 7) RADISYS CORPORATION (RSYS) (Name of Issuer) Common Stock (Title of Class of Securities) 750459109 (CUSIP Number) David Nierenberg The D3 Family Funds 19605 NE 8th Street Camas, WA 98607 (360) 604-8600 With a copy to: Henry Lesser, Esq. DLA Piper US LLP 2000 University Avenue East Palo Alto, CA 94303 (650) 833-2000 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) February 6, 2008 (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D and is filing this schedule because of ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box |_|. -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) The D3 Family Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |X| (b) |_| -------------------------------------------------------------------------------- 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) |_| -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Washington -------------------------------------------------------------------------------- 7 SOLE VOTING POWER 727,510 Common shares (3.3%) ------------------------------------------------------------ NUMBER OF 8 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ------------------------------------------------------------ EACH 9 SOLE DISPOSITIVE POWER REPORTING PERSON 727,510 WITH ------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 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, 4,417,163 shares (19.9%) -------------------------------------------------------------------------------- 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) 19.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) PN -------------------------------------------------------------------------------- 2 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) The DIII Offshore Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |X| (b) |_| -------------------------------------------------------------------------------- 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) |_| -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Bahamas -------------------------------------------------------------------------------- 7 SOLE VOTING POWER 801,176 common shares (3.6%) ------------------------------------------------------------ NUMBER OF 8 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ------------------------------------------------------------ EACH 9 SOLE DISPOSITIVE POWER REPORTING PERSON 801,176 WITH ------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 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, 4,417,163 shares (19.9%) -------------------------------------------------------------------------------- 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) 19.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) PN -------------------------------------------------------------------------------- 3 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) The D3 Family Bulldog Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |X| (b) |_| -------------------------------------------------------------------------------- 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) |_| -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Washington -------------------------------------------------------------------------------- 7 SOLE VOTING POWER 2,742,682 common shares (12.4%) ------------------------------------------------------------ NUMBER OF 8 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ------------------------------------------------------------ EACH 9 SOLE DISPOSITIVE POWER REPORTING PERSON 2,742,682 WITH ------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 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, 4,417,163 shares (19.9%) -------------------------------------------------------------------------------- 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) 19.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) PN -------------------------------------------------------------------------------- 4 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) The D3 Family Canadian Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |X| (b) |_| -------------------------------------------------------------------------------- 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) |_| -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Washington -------------------------------------------------------------------------------- 7 SOLE VOTING POWER 145,795 common shares (0.7%) ------------------------------------------------------------ NUMBER OF 8 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ------------------------------------------------------------ EACH 9 SOLE DISPOSITIVE POWER REPORTING PERSON 145,795 WITH ------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON For the reporting person listed on this page, 145,795 shares; for all reporting persons as a group, 4,417,163 shares (19.9%) -------------------------------------------------------------------------------- 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) 19.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) PN -------------------------------------------------------------------------------- 5 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Nierenberg Investment Management Company, Inc. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |X| (b) |_| -------------------------------------------------------------------------------- 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) |_| -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Washington -------------------------------------------------------------------------------- 7 SOLE VOTING POWER 0 ------------------------------------------------------------ NUMBER OF 8 SHARED VOTING POWER SHARES BENEFICIALLY 4,417,163 shares (19.9%) OWNED BY ------------------------------------------------------------ EACH 9 SOLE DISPOSITIVE POWER REPORTING PERSON 0 WITH ------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 4,417,163 shares -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON For the reporting person listed on this page, 4,417,163; for all reporting persons as a group, 4,417,163 shares (19.9 %) -------------------------------------------------------------------------------- 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) 19.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 6 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Nierenberg Investment Management Offshore, Inc. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |X| (b) |_| -------------------------------------------------------------------------------- 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) |_| -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Bahamas -------------------------------------------------------------------------------- 7 SOLE VOTING POWER 0 ------------------------------------------------------------ NUMBER OF 8 SHARED VOTING POWER SHARES BENEFICIALLY 801,176 common shares (3.6%) OWNED BY ------------------------------------------------------------ EACH 9 SOLE DISPOSITIVE POWER REPORTING PERSON 0 WITH ------------------------------------------------------------- 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, 4,417,163 shares (19.9%) -------------------------------------------------------------------------------- 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) 19.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 7 This Amendment No. 7 to Schedule 13D (this "Amendment") amends the below-indicated items from the Schedule 13D previously filed by or on behalf of the undersigned parties (the "Reporting Persons"), as previously amended (the "Schedule 13D"), by supplementing such Items with the information below: Item 3. Source and Amount of Funds or Other Consideration The source of funds for purchases of Shares by the Reporting Persons is the working capital of the Fund. The total amount of funds used by the Reporting Persons to pay for the purchases of Shares reported in Item 5(c) was $11,184,838.91. Item 4. Purpose of Transaction The Reporting Persons hold their Shares for investment. The Reporting Persons reserve the right to change their internal evaluation of this investment in the future, as well as to increase or decrease their investment depending on their evaluation although they have no present intention of acquiring Shares that would increase their aggregate ownership to 20% or above, and to discuss the company and their investment in it with the directors and executive officers of the company and third parties, without further amending the Schedule 13D except as required by applicable rules. Item 5. Interest in Securities of the Issuer. (a, b) The Reporting Persons, in the aggregate, beneficially own 4,417,163 common shares, constituting approximately 19.9% of the outstanding shares. (c) During the past sixty (60) days, the following purchases of Shares were made by the Reporting Persons in open market transactions: Fund Transaction Date Shares Bought Price ---- ---------------- ------------- ----- D3 Family Fund, LP 02/06/2008 151,675 10.83 DIII Offshore Fund, LP 02/06/2008 131,519 10.83 D3 Family Bulldog Fund, LP 02/06/2008 598,380 10.83 D3 Family Canadian Fund, LP 02/06/2008 33,426 10.83 D3 Family Bulldog Fund, LP 01/15/2008 701 12.25 D3 Family Bulldog Fund, LP 01/11/2008 600 12.20 D3 Family Bulldog Fund, LP 01/08/2008 3,300 12.94 D3 Family Bulldog Fund, LP 01/07/2008 12,180 12.98 D3 Family Bulldog Fund, LP 01/04/2008 10,000 12.96 D3 Family Canadian Fund, LP 01/04/2008 1,000 12.96 D3 Family Bulldog Fund, LP 01/03/2008 17,000 13.06 D3 Family Canadian Fund, LP 01/03/2008 1,207 13.06 D3 Family Bulldog Fund, LP 01/02/2008 1,300 13.10 D3 Family Canadian Fund, LP 01/02/2008 200 13.10 D3 Family Bulldog Fund, LP 12/31/2007 18,000 13.30 D3 Family Canadian Fund, LP 12/31/2007 398 13.30 D3 Family Bulldog Fund, LP 12/28/2007 19,000 13.29 D3 Family Canadian Fund, LP 12/28/2007 10,933 13.29 8 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, each of the undersigned certifies that the information set forth in the Statement is true, complete and correct. 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 February 8, 2008 By: /s/ David Nierenberg ----------------- ----------------------------------------- David Nierenberg, President DIII Offshore Fund, L.P. By: Nierenberg Investment Management Offshore, Inc. Its: General Partner February 8, 2008 By: /s/ David Nierenberg ----------------- ----------------------------------------- David Nierenberg, President Nierenberg Investment Management Company, Inc. February 8, 2008 By: /s/ David Nierenberg ----------------- ----------------------------------------- David Nierenberg, President Nierenberg Investment Management Offshore, Inc. February 8, 2008 By: /s/ David Nierenberg ----------------- ----------------------------------------- David Nierenberg, President 9