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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
887969	Mrv Communications Inc	MRVC	Semiconductors & Related Devices (3674)	061340090

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1205885	C William Martin	Ten Princeton Avenue Rocky Hill NJ 08553	No	No	Yes	No
1360436	Raging Capital Fund, Lp	Ten Princeton Avenue Rocky Hill NJ 08553	No	No	No	Yes
1444376	Raging Capital Management, Llc	Ten Princeton Avenue Rocky Hill NJ 08553	No	No	Yes	No
1467569	Raging Capital Fund (Qp), Lp	Ten Princeton Avenue Rocky Hill NJ 08553	No	No	No	Yes

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, Par Value $0.0017	Acquisiton	2012-01-13	43,000	$0.91	9,839,956	No	4	P	Indirect	By Raging Capital Fund (QP), LP
Common Stock, Par Value $0.0017	Acquisiton	2012-01-17	483,200	$0.95	10,323,156	No	4	P	Indirect	By Raging Capital Fund (QP), LP
Common Stock, Par Value $0.0017	Acquisiton	2012-01-18	17,000	$0.94	10,340,156	No	4	P	Indirect	By Raging Capital Fund (QP), LP

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By Raging Capital Fund (QP), LP
No	4	P	Indirect	By Raging Capital Fund (QP), LP
No	4	P	Indirect	By Raging Capital Fund (QP), LP

Footnotes

This Form 4 is filed jointly by Raging Capital Fund, LP, Raging Capital Fund (QP), LP ("Raging Capital Fund QP"), Raging Capital Management, LLC ("Raging Capital") and William C. Martin (collectively, the "Reporting Persons"). Each of the Reporting Persons may be deemed to be a member of a Section 13(d) group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the shares of Common Stock reported herein except to the extent of his or its pecuniary interest therein.
Represents shares of Common Stock owned directly by Raging Capital Fund QP. As the general partner of Raging Capital Fund QP, Raging Capital may be deemed to beneficially own the shares of Common Stock owned directly by Raging Capital Fund QP. As the managing member of Raging Capital, Mr. Martin may be deemed to beneficially own the shares of Common Stock owned directly by Raging Capital Fund QP.