<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No.1)
The Wiser Oil Company
---------------------
(Name of Issuer)
Common Stock
------------
(Title of Class of Securities)
977284 10 8
-----------
(CUSIP Number)
Bennie G. Kniffen
Senior Vice President
and Controller
Cross Timbers Oil Company
810 Houston Street, Suite 2000
Fort Worth, Texas 76102
(817)870-2800
-------------
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
May 25, 2000
------------
(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 (S)(S) 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 (S) 240.13d-7(b) for other
parties to whom copies are to be sent.
(Continued on following pages)
Page 1 of 6
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SCHEDULE 13D - Amendment No. 1
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CUSIP No. 977284 10 8
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1) Name of Reporting Persons: Cross Timbers Oil Company
I.R.S. Identification No. of Above Person: 75-2347769
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2) Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [_]
(b) [_]
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3) SEC Use Only
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4) Source of Funds (See Instructions) Not Applicable
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5) Check Box if Disclosure of Legal Proceedings is Required Pursuant
to Items 2(d) or 2(e) [_]
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6) Citizenship or Place of Organization Delaware
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7) Sole Voting Power
Number Of 590,000
Shares -----------------------------------------------------------
8) Shared Voting Power
Beneficially
0
Owned By
-----------------------------------------------------------
Each 9) Sole Dispositive Power
Reporting 590,000
Person -----------------------------------------------------------
10) Shared Dispositive Power
With
0
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11) Aggregate Amount Beneficially Owned by Each Reporting Person
590,000
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12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions) [_]
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13) Percent of Class Represented by Amount In Row (11)
6.6%
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14) Type of Reporting Person (See Instructions)
CO
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Page 2 of 6
<PAGE>
SCHEDULE 13D - Amendment No. 1
------------------------------------------------------------------------------
CUSIP No. 977284 10 8
------------------------------------------------------------------------------
1) Name of Reporting Person: Cross Timbers Oil Company
I.R.S. Identification No. of Above Person: 75-2613610
------------------------------------------------------------------------------
2) Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [_]
(b) [_]
------------------------------------------------------------------------------
3) SEC Use Only
------------------------------------------------------------------------------
4) Source of Funds (See Instructions) Not Applicable
------------------------------------------------------------------------------
5) Check Box if Disclosure of Legal Proceedings is Required Pursuant
to Items 2(d) or 2(e) [_]
------------------------------------------------------------------------------
6) Citizenship or Place of Organization Delaware
------------------------------------------------------------------------------
7) Sole Voting Power
Number Of 0
Shares -----------------------------------------------------------
8) Shared Voting Power
Beneficially
0
Owned By
-----------------------------------------------------------
Each 9) Sole Dispositive Power
Reporting 0
Person -----------------------------------------------------------
10) Shared Dispositive Power
With
0
------------------------------------------------------------------------------
11) Aggregate Amount Beneficially Owned by Each Reporting Person
0
------------------------------------------------------------------------------
12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions) [_]
------------------------------------------------------------------------------
13) Percent of Class Represented by Amount in Row (11)
0%
------------------------------------------------------------------------------
14) Type of Reporting Person (See Instructions)
CO
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Page 3 of 6
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Only the information reported for the following Items in this Amendment No. 1 to
Schedule 13D are amended from the initial filing on Schedule 13D dated October
6, 1998 (the initial Schedule 13D being referred to herein as "the Schedule
13D"). Unless specifically hereby amended, the information in the Schedule 13D
remains unchanged. Unless otherwise defined herein, all defined terms used
herein have the same meaning as in the Schedule 13D.
Item 2. Identity and Background
Item 2 is hereby amended as follows:
On October 1, 1999, J. Richard Seeds retired from Cross Timbers as
Executive Vice President and Director. Effective October 1, 1999, Louis G.
Baldwin was elected Executive Vice President and Chief Financial Officer, Keith
A. Hutton was elected Executive Vice President - Operations, and Vaughn O.
Vennerberg, II was elected Executive Vice President - Administration. On May 16,
2000, Herbert D. Simons was elected as a Director by the stockholders of Cross
Timbers.
Item 4. Purpose of Transaction
Item 4 is hereby amended as follows:
Cross Timbers intends to sell the remaining Common Stock that it owns
from time to time.
Item 5. Interest in Securities of the Issuer
(a) As of May 31, 2000, Cross Timbers is deemed to beneficially own
590,000 shares of Common Stock, or approximately 6.6% of the Issuer's
8,951,965 shares outstanding at March 31, 2000, as reported in the
Issuer's Quarterly Report on Form 10-Q for its quarter ended March 31,
2000. To Cross Timbers' and CTTC's knowledge, none of the persons
listed in Schedule I to the Schedule 13D own any Common Stock.
(b) As of May 31, 2000, CTTC has voting power or dispositive power with
respect to 0 shares of Common Stock, and Cross Timbers has voting
power or dispositive power with respect to 590,000 shares of Common
Stock.
(c) Cross Timbers sold the following shares of Common Stock in open market
transactions:
<TABLE>
<CAPTION>
Date Amount of Securities Price per Share
---- -------------------- ---------------
<S> <C> <C>
5/16/00 15,600 $3.209
5/17/00 10,500 3.00
5/18/00 23,300 3.00
5/19/00 2,500 3.00
5/22/00 2,500 3.00
5/25/00 32,300 2.527
</TABLE>
To the best of Cross Timbers' and CTTC's knowledge, none of the
persons listed in Schedule I to this Schedule 13D have effected any
Common Stock transactions during the past 60 days.
(d) No other person is known by Cross Timbers or CTTC to have the right to
receive or the power to direct the receipt of distributions from, or
the proceeds from the sale of, the Common Stock beneficially owned by
Cross Timbers or CTTC described in Item 5(a) above.
Page 4 of 6
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SIGNATURES
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.
CROSS TIMBERS OIL COMPANY
Date: May 31, 2000 By: /s/ BENNIE G. KNIFFEN
------------------------------------
Bennie G. Kniffen
Senior Vice President and Controller
CROSS TIMBERS TRADING COMPANY
By: /s/ BENNIE G. KNIFFEN
------------------------------------
Bennie G. Kniffen
Senior Vice President and Controller
Page 5 of 6
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SCHEDULE I TO SCHEDULE 13D
The following is a list of all executive officers of Cross Timbers and CTTC
and their present principal office held. The business address for each of these
executive officers is 810 Houston Street, Suite 2000, Fort Worth, Texas, 76102.
<TABLE>
<CAPTION>
Name Present Principal Office Held
--------------- ---------------------------------------------------------------
<S> <C>
Bob R. Simpson Chairman of the Board of Directors and Chief Executive Officer
Steffen E. Palko Vice Chairman of the Board of Directors and President
Louis G. Baldwin Executive Vice President and Chief Financial Officer
Keith A. Hutton Executive Vice President - Operations
Vaughn O. Vennerberg, II Executive Vice President - Administration
Bennie G. Kniffen Senior Vice President - Controller
</TABLE>
The following is a list of all Cross Timbers' directors (with the exception
of Messrs. Simpson and Palko, who are listed above), their business address and
present principal employment and employer. CTTC's directors are Messrs. Simpson
and Palko, who are listed above.
<TABLE>
<CAPTION>
Name and Business Address Present Principal Employment and Employer
------------------------- -----------------------------------------------------
<S> <C>
Dr. Lane G. Collins Professor of Accounting, Baylor University
(Advisory Director)
Hankamer School of Business
Baylor University
Waco, Texas 76798
J. Luther King, Jr. President, Principal and Portfolio Manager/Analyst,
301 Commerce Street, Luther King Capital Management Corporation
Suite 1600
Fort Worth, TX 76102
Jack P. Randall President, Randall & Dewey
16800 Greenspoint Park Drive,
Suite 380-S
Houston, Texas 77060
Scott G. Sherman Owner, Sherman Enterprises
777 Taylor Street,
Suite 1135
Fort Worth, Texas 76102
Herbert D. Simons Of Counsel, Winstead Sechrest & Minick P.C.
910 Travis Street
Suite 2400
Houston, Texas 77002
</TABLE>
Page 6 of 6
