FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * LOEB PARTNERS CORP   2. Issuer Name and Ticker or Trading Symbol SPACEDEV, INC. [SPDV] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 61 BROADWAY 3. Date of Earliest Transaction (Month/Day/Year) 02/21/2008 (Street) NEW YORK, NY 10006 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/21/2008   P   500,000 A $ 0.75 4,792,300 I See footnote 1 (1)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
LOEB PARTNERS CORP 61 BROADWAY NEW YORK, NY 10006		X

Signatures

/s/ Michael S. Emanuel		02/25/2008
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The shares of common stock, $0.01 par value per share (the "Common Stock"), of the Issuer to which this form relates are held directly as follows: 1,630,686 shares held by Loeb Arbitrage Fund; 154,326 shares held by Loeb Partners Corporation (shares purchased for customers as to which Loeb Partners Corporation has investment discretion); 356,363 shares held by Loeb Offshore Fund Ltd.; 506,822 shares held by Loeb Arbitrage B Fund LP; 158,803 shares held by Loeb Offshore B Fund Ltd.; 1,190,331 shares held by Loeb Marathon Fund, LP; 794,969 shares held by Loeb Marathon Offshore Fund, Ltd. On February 21, 2008, the following shares of Common Stock were purchased: 212,549 shares by Loeb Arbitrage Fund; 52,033 shares by Loeb Arbitrage B Fund LP; 104,248 shares by Loeb Marathon Fund, LP; 70,752 shares by Loeb Marathon Offshore Fund, Ltd.; 41,438 shares by Loeb Offshore Fund Ltd.; 18,980 shares by Loeb Offshore B Fund Ltd.

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