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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
1349093	K Liane Hinrichs	757 N. Eldridge Parkway Houston TX 77079	Srvp, Gen.counsel & Corp. Sec.	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
Common Stock	Acquisiton	2011-03-04	10,185	$0.00	139,418	No	4	M	Direct
Common Stock	Disposition	2011-03-04	2,883	$25.64	136,535	No	4	F	Direct
Common Stock	Acquisiton	2011-03-05	19,168	$0.00	155,703	No	4	M	Direct
Common Stock	Disposition	2011-03-05	6,986	$25.74	148,717	No	4	F	Direct
Common Stock	Acquisiton	2011-03-08	27,202	$5.64	175,919	No	4	M	Direct
Common Stock	Disposition	2011-03-08	27,202	$24.99	148,717	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	F	Direct
No	4	M	Direct
No	4	F	Direct
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	Restricted Stock Units	Disposition	2011-03-04	10,185	$0.00	10,185	$0.00
Common Stock	Restricted Stock Units	Acquisiton	2011-03-04	10,014	$0.00	10,014	$0.00
Common Stock	Stock Option (right to buy)	Acquisiton	2011-03-04	22,080	$0.00	22,080	$25.64
Common Stock	Restricted Stock Units	Disposition	2011-03-05	19,168	$0.00	19,168	$0.00
Common Stock	Employee Stock Option (right to buy)	Disposition	2011-03-08	27,202	$0.00	27,202	$5.64

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
20,371	2011-03-04	2011-03-04	No	4	M	Direct
10,014			No	4	A	Direct
22,080		2018-03-04	No	4	A	Direct
19,169	2011-03-05	2011-03-05	No	4	M	Direct
27,203		2016-03-05	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,857	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 $24.9515 to $25.00, 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 4, 2011.
Each restricted stock unit represents a contingent right to receive one share of MDR common stock.
The restricted stock units vest in three equal annual installments beginning March 4, 2011.
The restricted stock units vest in three equal annual installments beginning March 4, 2012.
The option is exercisable in three equal annual installments beginning March 4, 2012.
The restricted stock units vest in three equal annual installments beginning March 5, 2010.
The option vests in three equal annual installments on March 5, 2010, 2011 and 2012.