UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 3)*

EMCORE Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

290846203

(CUSIP Number)

Northern Right Capital Management, L.P.

Attn: Matthew A. Drapkin

9 Old Kings Hwy. S.

4th Floor

Darien, Connecticut 06820

(203) 951-5440

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

March 22, 2019

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  ☐

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 290846203

CUSIP No. 290846203

CUSIP No. 290846203

CUSIP No. 290846203

CUSIP No. 290846203

This Amendment No. 3 to Schedule 13D amends and supplements the Schedule 13D filed with the Securities and Exchange Commission (the “SEC”) on October 10, 2018, on behalf of the Reporting Persons, with respect to the shares of common stock, no par value (the “Common Stock”), of EMCORE Corporation, a New Jersey corporation (the “Issuer”).

Item 3 is amended and supplemented to add the following information for updating as of the date hereof:

The Reporting Persons expended an aggregate amount equal to $13,183,243 (including commissions) to purchase 2,485,644 shares of Common Stock. Funds used to purchase the reported securities held by Northern Right QP have come from the working capital of Northern Right QP, which may, at any given time, include margin loans made by brokerage firms or banks in the ordinary course of business. Funds used to purchase reported securities held by the Managed Account have come from the funds of the Managed Account, which may, at any given time, include margin loans made by brokerage firms or banks in the ordinary course of business.

Item 5 is amended and supplemented to add the following information for updating as of the date hereof:

(a), (b) The Reporting Persons may be deemed to beneficially own in the aggregate [•]shares of Common Stock. Based upon a total of 27,670,466 outstanding shares of Common Stock as of January 31, 2019, as reported in the Issuer’s annual report on Form 10-Q for the quarter ended December 31, 2018, which was filed with the Securities and Exchange Commission on February 6, 2019 the Reporting Persons’ shares represent approximately 8.98% of the outstanding shares of Common Stock.

Northern Right QP beneficially owns and has the power to vote or to direct the vote of (and the power to dispose or direct the disposition of) 1,820,012 shares of Common Stock (the “QP Shares”), which represent approximately 6.58% of the outstanding shares of Common Stock.

NRC Partners I, LP beneficially owns and has the power to vote or to direct the vote of (and the power to dispose or direct the disposition of) 299,245 shares of Common Stock (the “NRC Shares”), which represent approximately 1.08% of the outstanding shares of Common Stock.

As general partner and investment manager of Northern Right QP and NRC Partners I, LP, Northern Right Management may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) the QP Shares and the NRC Shares. Northern Right Management disclaims beneficial ownership of the QP Shares and NRC Shares. Northern Right Management in its capacity as investment manager for the Managed Account may be deemed to have the sole power to vote or direct the vote of (and the sole power to dispose or direct the disposition of) 366,387 shares held by the Managed Account (the “Managed Account Shares”), which represent approximately 1.32% of the outstanding shares of Common Stock. Northern Right QP disclaims beneficial ownership of the Managed Account Shares.

As general partner of Northern Right Management, BCA may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) any shares of Common Stock beneficially owned by Northern Right Management. BCA disclaims beneficial ownership of any shares of Common Stock beneficially owned by Northern Right Management.

As managing member of BCA, Mr. Drapkin may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) any shares of Common Stock beneficially owned by BCA. Mr. Drapkin disclaims beneficial ownership of any shares of Common Stock beneficially owned by BCA.

As of the date hereof, no Reporting Person owns any shares of Common Stock other than those set forth in this Item 5.

(c) The trading dates, number of shares of Common Stock purchased or sold, and the price per share of Common Stock for all transactions by the Reporting Persons in shares of Common Stock since the original filing of this Schedule 13D, all of which were brokered transactions, are set forth below.

(d) No person other than the Reporting Persons, and the Managed Account with respect to the Managed Account Shares, has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of common Stock set forth above.

(e) Not applicable.

SIGNATURES

After reasonable inquiry and to the best of each of the undersigned’s knowledge and belief, each of the undersigned, severally and not jointly, certified that the information set forth in this statement is true, complete and correct.

Dated: March 26, 2019