December 31, 2005
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Under the Securities Exchange Act
(Amendment No. 1 )*
HALLADOR PETROLEUM COMPANY
(Name of Issuer)
Common Stock, par value $.01
(Title of Class of Securities)
Peter A. Leidel
410 Park Avenue, 19th Floor
New York, New
(Name, Address and Telephone Number
of Person Authorized to
Receive Notices and Communications)
(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 that is the
subject of this Schedule 13D, and is filing this schedule because of
§§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.
Note: Schedules filed in paper
format shall include a signed original and five copies of the schedule,
including all exhibits. See §240.13d-7 for other parties to whom copies are
to be sent.
* The remainder of this cover page shall
be filled out for a reporting persons initial filing on this form with
respect to the subject class of securities, and for any subsequent amendment
containing information which would alter disclosures provided in a prior cover
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).
Persons who respond to the collection
of information contained in this form are not required to respond unless the
form displays a currently valid OMB control number.
Page 1 of 4
Item 1. SECURITY AND ISSUER.
This Amendment No. 1 amends the Schedule 13D filed on February 27, 1998 relating to the common
stock (the Common Stock) of Hallador Petroleum Company (the Company) whose principal executive
offices are located at 1660 Lincoln Street, Suite 2700, Denver, CO 80264.
Item 2. IDENTITY AND BACKGROUND.
This statement is filed by Yorktown Energy Partners II, L.P., a Delaware limited partnership
(Yorktown). Yorktowns principal office and business address is 410 Park Avenue, 19th
Floor, New York, New York, 10022. The principal business of Yorktown is investing in equity
securities of energy investments.
Yorktown has not, during the last five years, been convicted in a criminal proceeding
(excluding traffic violations or similar misdemeanors).
Yorktown has not, during the last five years, been a party to a civil proceeding of a judicial
or administrative body of competent jurisdiction and as a result of such proceeding was or is
subject to a judgment, decree or final order enjoining future violations of, or prohibiting or
mandating activities subject to, federal or state securities laws or finding any violation with
respect to such laws.
Item 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.
Item 4. PURPOSE OF TRANSACTION.
Item 5. INTEREST IN SECURITIES OF THE ISSUER.
(a) As of December 20, 2005, Yorktown did not own any shares of common stock of the Company.
(c) Yorktown sold 1,936,725 shares to Yorktown Energy Partners VI, L.P., 136,710 shares to
Lubar Equity Fund, LLC, 136,710 shares to Tecovas Partners V, L.P. and 68,355 shares to Murchison
Capital Partners, L.P. for $2.20 per share on December 20, 2005.
Item 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER.
Item 7. MATERIAL TO BE FILED AS EXHIBITS
Page 3 of 4