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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 6411 Te Heerlen P7		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	15,712,946	$31.50	45,755,200	No	4	P	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
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"), formerly a Delaware corporation and an indirect wholly owned subsidiary of the Reporting Person. The shares of common stock to which this Form 4 relates were acquired by Greenback directly from the Issuer pursuant to an agreement and plan of merger, dated as of December 20, 2010, among the Issuer, the Reporting Person and Greenback, following the expiration of a tender offer for all outstanding shares of common stock of the Issuer, 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. Following the acquisition of shares as reported herein, Greenback was merged with and into the Issuer and the shares reported herein were canceled.