13D Filing: Nierenberg Investment Management and Radisys Corp (RSYS)

The following constitutes Amendment No. 13 to the Schedule 13D filed by the undersigned (“Amendment No. 13”). This Amendment No. 13 amends the Schedule 13D with respect to the shares of common stock (the “Shares”) of Radisys Corporation. (“RSYS” or the “Company”) previously filed by or on behalf of the Reporting Persons specifically set forth herein.

Item 5.  Interest in Securities of the Issuer

Item 5(a) is hereby amended and restated to read as follows:

As of the close of business on the date hereof, the Family Fund individually beneficially owned 439,169 Shares, constituting approximately 1.1% of all of the outstanding Shares.

As of the close of business on the date hereof, the Bulldog Fund individually beneficially owned 1,070,648 Shares, constituting approximately 2.8% of all of the outstanding Shares.

As of the close of business on the date hereof, the Offshore Fund individually beneficially owned 79,836 Shares, constituting less than 1% of all of the outstanding Shares.

By virtue of its relationships with each of the Family Fund, the Bulldog Fund and the Offshore Fund discussed in further detail in Item 2, NIMCO may be deemed to be the beneficial owner of the 1,589,653 Shares, beneficially owned in the aggregate by the Family Fund, the Bulldog Fund and the Offshore Fund, constituting approximately 4.1% of all of the outstanding Shares.

By virtue of its relationships with the Offshore Fund discussed in further detail in Item 2, NIMO may be deemed to be the beneficial owner of the 79,836 Shares, beneficially owned by the Offshore Fund, constituting  less than 1% of all of the outstanding Shares.

By virtue of his relationship with NIMCO and NIMO discussed in further detail in Item 2, Mr. Nierenberg may be deemed to be the beneficial owner of the 1,589,653 Shares beneficially owned by NIMCO and NIMO, constituting approximately 4.1% of all of the outstanding Shares.

The Reporting Persons, in the aggregate, beneficially own 1,589,653 Shares, constituting approximately 4.1% of the outstanding Shares.

Item 5(b) is hereby amended and restated to read as follows: