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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
892025	Martek Biosciences Corp	MATK	Biological Products, (No Disgnostic Substances) (2836)	521399362

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1339422	N.v. Dsm Royal	Het Overloon 1 Heerlen P7 6411 TE		No	No	Yes	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	2011-02-22	32	$31.50	29,779,952	No	4	P	Indirect	See Footnote
Common Stock	Acquisiton	2011-02-23	17,000	$31.50	29,796,952	No	4	P	Indirect	See Footnote
Common Stock	Acquisiton	2011-02-24	245,302	$31.50	30,042,254	No	4	P	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See Footnote
No	4	P	Indirect	See Footnote
No	4	P	Indirect	See Footnote

Footnotes

The Reporting Person is filing this Form 4 on behalf of itself and on behalf of Greenback Acquisition Corporation ("Greenback"), a Delaware corporation and an indirect wholly owned subsidiary of the Reporting Person, with principal executive offices located at 45 Waterview Blvd., Parsippany, NJ 07054. The shares of common stock to which this Form 4 relates were acquired by Greenback during the subsequent offering period of a tender offer for all outstanding shares of common stock of Martek Biosciences Corporation, upon the terms and subject to the conditions set forth in the Offer to Purchase dated January 13, 2011, which was annexed to and filed with the Schedule TO filed by the Reporting Person with the Securities and Exchange Commission on January 13, 2011.