PLUG POWER INC — Major Shareholding Notification 2010

Feb 9, 2010

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934 (Amendment No. 1)*

Plug Power, Inc.

(Name of Issuer)

Common Stock, par value $.01 per share

(Title of Class of Securities)

72919P103

(CUSIP Number)

January 31, 2010

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o Rule 13d-1(b)

þ Rule 13d-1(c)

o Rule 13d-1(d)

• The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in 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).

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CUSIP No. 72919P103

1	NAMES OF REPORTING PERSONS DTE Energy Foundation
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) N.A.
	(a) o
	(b) o
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	Michigan
	5	SOLE VOTING POWER
NUMBER OF		2,861,143
SHARES	6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY		0
EACH	7	SOLE DISPOSITIVE POWER
REPORTING
PERSON		2,861,143
WITH:	8	SHARED DISPOSITIVE POWER
		0
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	2,861,143
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
	2.2%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
	CO

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CUSIP No. 72919P103

Item 1(a). Name of Issuer:

Plug Power, Inc., a Delaware corporation.

Item 1(b). Address of Issuer’s Principal Executive Offices:

968 Albany-Shaker Road, Latham, New York 12110.

Item 2(a). Name of Person Filing:

DTE Energy Foundation.

Item 2(b). Address of Principal Business Office or, if None, Residence:

One Energy Plaza, Detroit, Michigan 48226.

Item 2(c). Citizenship:

Michigan.

Item 2(d). Title of Class of Securities:

Common Stock, $.01 par value per share.

Item 2(e). CUSIP Number:

72919P103.

ITEM 3. If this statement is filed pursuant to §§ 240.13d-1(b), or 240.13d-2(b) or (c):

Not applicable.

ITEM 4. Ownership.

(a)	Amount beneficially owned: 2,861,143 shares
(b)	Percent of class: 2.2
(c)	Number of shares as to which such person has:

(i)	Sole power to vote or to direct the vote: 2,861,143
(ii)	Shared power to vote or to direct the vote: 0
(iii)	Sole power to dispose or to direct the disposition of: 2,861,143
(iv)	Shared power to dispose or to direct the disposition of: 0

ITEM 5. Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following [ x ].

Folio /Folio

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CUSIP No. 72919P103

ITEM 6. Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

ITEM 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Not applicable.

ITEM 8. Identification and Classification of Members of the Group.

Not applicable.

ITEM 9. Notice of Dissolution of Group.

Not applicable.

ITEM 10. Certifications.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Folio /Folio

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CUSIP No. 72919P103

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

/s/ Karla Hall
Name:	Karla Hall
Title:	Vice President and Secretary

Folio /Folio