Formal Notice

NEW YORK--()--

SUPPLEMENTAL FORM 8 (OPEN POSITIONS)

DETAILS OF OPEN STOCK-SETTLED DERIVATIVE (INCLUDING OPTION) POSITIONS, AGREEMENTS TO PURCHASE OR SELL ETC.

Note 5(i) on Rule 8 of the Takeover Code (the “Code”)

1. KEY INFORMATION

Full name of person making disclosure:   Water Island Capital LLC
Name of offeror/offeree in relation to whose relevant securities the disclosure relates: STERIS Corp

2. STOCK-SETTLED DERIVATIVES (INCLUDING OPTIONS)

Class of relevant security   Product description e.g. call option   Written or purchased   Number of securities to which option or derivative relates   Exercise price per unit   Type

e.g. American, European etc.

  Expiry date
Ordinary Put Written 85500 65 American 18/9/15
Ordinary Call Purchased 85500 70 American 18/9/15

3. AGREEMENTS TO PURCHASE OR SELL ETC.

Full details should be given so that the nature of the interest or position can be fully understood:

It is not necessary to provide details on a Supplemental Form (Open Positions) with regard to cash-settled derivatives.

The currency of all prices and other monetary amounts should be stated.

The Panel’s Market Surveillance Unit is available for consultation in relation to the Code’s disclosure requirements on +44 (0)20 7638 0129.

The Code can be viewed on the Panel’s website at www.thetakeoverpanel.org.uk.

Short Name: WIC
Category Code: FON
Sequence Number: 478028
Time of Receipt (offset from UTC): 20150804T151457+0100

Contacts

Water Island Capital, LLC

Contacts

Water Island Capital, LLC