FORM 12b-25

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

Not applicable  

Part I - Registrant Information

EMCORE Corporation

Full Name of Registrant

Not applicable

Former Name if Applicable

10420 Research Road, SE

Address of Principal Executive Office (Street and Number)

Albuquerque, NM 87123

City, State and Zip Code

Part II - Rules 12b-25(b) and (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed.(Check box if appropriate.)

Part III - Narrative

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q,10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

As a result of the time necessary to complete the compilation and audit of the Company's financial statements, the Company was unable to complete the filing of its Form 10-K for the fiscal year ended September 30, 2009 by the due date of December 14, 2009, without unreasonable effort or expense. The Company believes that it will be able to file its Form 10-K for the fiscal year ended September 30, 2009 within the fifteen calendar day period provided under Rule 12b-25(b).

Part IV - Other Information

1. Name and telephone number of person to contact in regard to this notification

   Mr. John M. Markovich	(505)	332-5000
   (Name)	(Area Code)	(Telephone Number)

2. Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed?

   Yes

   √

   No

   If answer is no, identify report(s).

    

3. Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?

   Yes

   √

   No

   If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

   During the fiscal year ended September 30, 2009, the Company experienced significant adverse changes in its results of operations (in particular, revenue, gross margin, operating loss, and net loss) when compared to the prior fiscal year due primarily to adverse changes in the macroeconomic environment. During the fiscal year ended September 30, 2009, the Company incurred approximately $60.8 million of non-cash expenses related to impairment of goodwill and long-lived assets in its Fiber Optics business segment, primarily related to the Company's acquisition of Intel Corporation's fiber optics assets in 2008. The Company expects to report a net loss of approximately $136 million for the fiscal year ended September 30, 2009.