Oceaneering International, Inc. (“OII/OII1C/OII1D”)
2-for-1 Stock Split
Ex-Distribution Date: June 13, 2011

Attached, for your information is a memo from the Options Clearing Corporation.

We urge you to read this (see link) and distribute to others within your organization you deem appropriate.

http://www.theocc.com/components/docs/market-data/infomemos/2011/may/28841.pdf
If clicking on the link above does not work, then copy and paste into your browser.

Key Information:
OII1C No Change
OII1D No Change
Positions at clearinghouse Double
Start of day price Halved from prior day’s settlement
GTC Order Handling* Handled by Firm
* Member firms must determine if the new GTC order terms meet their clients’ objectives and cancel or cancel/replace orders as appropriate.