13D Filing: VIEX Capital Advisors and Radisys Corp (RSYS)

The following constitutes
Amendment No. 2 to Schedule 13D filed by the undersigned (the “Amendment No. 2”). This Amendment No. 2 amends the Schedule
13D as specifically set forth herein.

Item 3.

Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended
and restated to read as follows:

The Shares purchased
by Series One were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in
the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule A, which is incorporated
by reference herein. The aggregate purchase price of the 1,899,443 Shares beneficially owned by Series One is approximately $2,180,919,
including brokerage commissions.

Item 5.

Interest in Securities of the Issuer.

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

The aggregate percentage
of Shares reported owned by each Reporting Person is based upon 39,411,001 Shares outstanding, which is the total number of Shares
outstanding as of February 26, 2018 as reported in the Issuer’s Annual Report on Form 10-K, filed with the Securities and
Exchange Commission on February 28, 2018.

A.

Series One

(a)

As of the close of business on March 13, 2018, Series One beneficially owned 1,899,443 Shares.

Percentage: Approximately
4.8%

(b)

1. Sole power to vote or direct vote: 0 2. Shared power to vote or direct vote: 1,899,443 3. Sole power to dispose or direct the disposition: 0 4. Shared power to dispose or direct the disposition: 1,899,443

(c)

The transactions in the Shares by Series One during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

B.

VIEX GP

(a)

VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the 1,899,443 shares owned by Series One.

Percentage: Approximately
4.8%

(b)

1. Sole power to vote or direct vote: 0 2. Shared power to vote or direct vote: 1,899,443 3. Sole power to dispose or direct the disposition: 0 4. Shared power to dispose or direct the disposition: 1,899,443