SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No._4_)
Gladstone Commercial Corporation
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(Name of Issuer)
Common stock
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(Title of Class of Securities)
376536108
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(CUSIP Number)
December 31, 2006
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(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
[X] Rule 13d-1(b)
[_] Rule 13d-(c)
[_] Rule 13d-1(d)
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(1) 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 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. 376536108 13G Page 2 of 5 Pages
1. NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Avenir Corporation
I.R.S. Identification Nos. of above persons (entities only).
54-1146619
_______________________________________________________________________________
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [_]
(b) [X]
_______________________________________________________________________________
3. SEC USE ONLY
_______________________________________________________________________________
4. CITIZENSHIP OR PLACE OF ORGANIZATION
State of Virginia, USA
_______________________________________________________________________________
NUMBER OF 5. SOLE VOTING POWER
SHARES 879,361
________________________________________________________________
BENEFICIALLY 6. SHARED VOTING POWER
OWNED BY 0
________________________________________________________________
EACH 7. SOLE DISPOSITIVE POWER
REPORTING
879,361
________________________________________________________________
PERSON 8. SHARED DISPOSITIVE POWER
WITH 0
_______________________________________________________________________________
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
879,361
_______________________________________________________________________________
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
NA [_]
_______________________________________________________________________________
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11.12%
_______________________________________________________________________________
12. TYPE OF REPORTING PERSON*
IA
_______________________________________________________________________________
*SEE INSTRUCTIONS BEFORE FILLING OUT!
CUSIP No. 376536108 13G Page 3 of 5 Pages
_______________________________________________________________________________
Item 1(a). Name of Issuer:
Gladstone Commercial Corporation
_______________________________________________________________________________
Item 1(b). Address of Issuer's Principal Executive Offices:
1616 Anderson Road, Suite 208
McLean, VA 22102
_______________________________________________________________________________
Item 2(a). Name of Person Filing:
Avenir Corporation
_______________________________________________________________________________
Item 2(b). Address of Principal Business Office, or if None, Residence:
1725 K St., NW, Suite 401
Washington, DC 20006
_______________________________________________________________________________
Item 2(c). Citizenship:
State of Virginia, USA
_______________________________________________________________________________
Item 2(d). Title of Class of Securities:
Common Stock
_______________________________________________________________________________
Item 2(e). CUSIP Number:
376536108
_______________________________________________________________________________
Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b)
or (c), Check Whether the Person Filing is a:
(a) [_] Broker or dealer registered under Section 15 of the Exchange Act.
(b) [_] Bank as defined in Section 3(a)(6) of the Exchange Act.
(c) [_] Insurance company as defined in Section 3(a)(19) of the Exchange
Act.
(d) [_] Investment company registered under Section 8 of the Investment
Company Act.
(e) [X] An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
(f) [_] An employee benefit plan or endowment fund in accordance with
Rule 13d-1(b)(1)(ii)(F);
(g) [ ] A parent holding company or control person in accordance with
Rule 13d-1(b)(1)(ii)(G);
(h) [_] A savings association as defined in Section 3(b) of the Federal
Deposit Insurance Act;
(i) [_] A church plan that is excluded from the definition of an
investment company under Section 3(c)(14) of the Investment
Company Act;
(j) [_] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(c), check this box. [_]
CUSIP No. 376536108 13G Page 4 of 5 Pages
Item 4. Ownership.
Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.
(a) Amount beneficially owned:
879,361
(b) Percent of class:
11.12%
(c) Number of shares as to which such person has:
(i) Sole power to vote or to direct the vote
879,361
(ii) Shared power to vote or to direct the vote
0
(iii) Sole power to dispose or to direct the disposition of
879,361
(iv) Shared power to dispose or to direct the disposition of
0
_______________________________________________________________________________
Item 5. Ownership of Five Percent or Less of a Class.
NA
_______________________________________________________________________________
Item 6. Ownership of More Than Five Percent on Behalf of Another Person.
NA
_______________________________________________________________________________
Item 7. Identification and Classification of the Subsidiary Which Acquired the
Security Being Reported on by the Parent Holding Company.
NA
_______________________________________________________________________________
Item 8. Identification and Classification of Members of the Group.
NA
_______________________________________________________________________________
Item 9. Notice of Dissolution of Group.
NA
_______________________________________________________________________________
Item 10. Certifications.
(a) The following certification shall be included if the statement is
filed pursuant to Rule 13d-1(b):
"By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and are held in
the ordinary course of business and were not acquired and 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 such purpose or effect."
CUSIP No. 376536108 13G Page 5 of 5 Pages
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.
February 9, 2007
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Date
/s/ Peter C. Keefe
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Signature
Peter C. Keefe, President
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Name/Title