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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1030749	Gulfmark Offshore Inc	GLF	Oil & Gas Field Machinery & Equipment (3533)	760526032

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1452077	R Samuel Rubio	10111 Richmond Ave. Ste. 340 Houston TX 77042	Vp - Controller & Cao	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	Disposition	2010-03-13	652	$28.49	11,809	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	PHANTOM STOCK	Acquisiton	2010-03-15	543	$28.32	543	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
7,265			No	4	P	Direct

Footnotes

Under the terms of the GulfMark 1997 Incentive Equity Plan, shares were sold to the Company to satisfy the tax obligation on restricted shares which restrictions lapsed.
Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the "Plan"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service.