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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
708819	Mcdermott International Inc	MDR	Fabricated Plate Work (Boiler Shops) (3443)	720593134

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1507968	T John Mccormack	757 N. Eldridge Parkway Houston TX 77079	Senior Vp, Operations	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-03-08	14,154	$5.64	36,019	No	4	M	Direct
Common Stock	Disposition	2011-03-08	14,154	$25.00	21,865	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Disposition	2011-03-08	14,154	$0.00	14,154	$5.64

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
14,155		2016-03-05	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	1,284	Indirect	401K Plan

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.96 to $25.05, inclusive. The reporting person undertakes to provide to McDermott International, Inc., any security holder of McDermott International, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Based upon units held in 401K Plan and the fair market value of MDR common stock as of March 8, 2011.
The option vests in three equal annual installments on March 5, 2010, 2011 and 2012.