SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Schedule 13G
Under the Securities Exchange Act of 1934
(Amendment No. )*
Southwestern Energy Company
____________________________________________
(Name of Issuer)
Common stock
____________________________________________
(Title of Class of Securities)
845467109
_________________________
(CUSIP Number)
Check the following box if a fee is being paid with this statement [ ]. (A fee
is not required only if the filing person: (1) has a previous statement on file
reporting beneficial ownership of more than 5 percent of the class securities
described in Item 1; and (2) has filed no amendment subsequent thereto reporting
beneficial ownership of five percent or less of such class.) (See Rule 13d-7.)
* The remainder of the 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 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).
(Continued on following page(s))
Page 1 of 5 Pages
CUSIP No. 845467109 13G Page 2 of 5 Pages
1. NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
State Street Research & Management Company
#13-31424135
______________________________________________________________________________
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
______________________________________________________________________________
3. SEC USE ONLY
______________________________________________________________________________
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Reporting Person is a corporation organized under Delaware laws.
Principal office of Reporting Person is in Boston, MA.
______________________________________________________________________________
5. SOLE VOTING POWER
1,306,800
NUMBER OF
SHARES 6. SHARED VOTING POWER
BENEFICIALLY -0-
OWNED BY EACH
REPORTING 7. SOLE DISPOSITIVE POWER
PERSON WITH 1,373,300
8. SHARED DISPOSITIVE POWER
-0-
______________________________________________________________________________
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,373,300
______________________________________________________________________________
10. CHECK BOX IF AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
______________________________________________________________________________
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
5.49%
______________________________________________________________________________
12. TYPE OF REPORTING PERSON*
Investment adviser
*SEE INSTRUCTIONS BEFORE FILLING OUT
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SCHEDULE G
Item 1(a). Name of Issuer
Southwestern Energy Company
Item 1(b). Address of Issuers Principal Office
1083 Sain Street
P.O. Box 1408
Fayetteville, AR 72702-1408
Item 2(a). Name of Person Filing
State Street Research & Management Company
Item 2(b). Address of Principal Business Office
One Financial Center, 30th Floor
Boston, MA 02111-2690
Item 2(c). Citizenship
Reporting Person is a corporation organized under
Delaware laws. Principal office of Reporting Person is
Boston, MA
Item 2(d). Title of Class of Securities
Common Stock
Item 2(e). CUSIP Number
845467109
Item 3. If this statement is filed pursuant to Rules 13d-1(b),
or 13d-2(b), check whether the person filing is a:
(a) [ ] Broker or dealer registered under Section 15 of the Act
(b) [ ] Bank as defined in Section 3(a)(6) of the Act
(c) [ ] Insurance Company registered under Section 3(a)(19) of
the Act
(d) [ ] Investment company registered under Section 8 of the
Investment Company Act
(e) [x] Investment Adviser registered under Section 203 of the
Investment Advisers Act of 1940
(f) [ ] Employee Benefit Plan, Pension Fund which is subject
to the provisions of the Employee Retirement Income
Security Act of 1974 or Endowment Fund: see Section
240.13d-1(b)(1)(ii)(F)
(g) [ ] Parent Holding Company, in accordance with Section
240.13d-1(b)(ii)(G) (Note: See Item 7)
(h) [ ] Group, in accordance with Section 240.13d-1(b)(1)(ii)(H)
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SCHEDULE G
Item 4. Ownership
If the percent of the class owned, as of December 31 of
the year covered by the statement, or as of the last day of any month described
in Rule 13d-1(b)(2), if applicable, exceeds 5 percent, provide the following
information as of that date and identify those shares which there is a right to
acquire.
(a) Amount beneficially owned: 1,373,300
(b) Percent of Class: 5.49%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote:
1,306,800
(ii) shared power to vote or to direct the vote:
-0-
(iii) sole power to dispose or to direct the
disposition of: 1,373,300
(iv) shared power to dispose or direct the
disposition of: -0-
State Street Research & Management Company disclaims any
beneficial interest in any of the foregoing securities.
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 five percent of the class of securities, check the following [ ].
Item 6. Ownership of More than Five Percent on Behalf of Another
Person.
If any other person is known to have the right to
receive or the power to direct the receipt of dividends from, or the proceeds
from the sale of, such securities, a statement to that effect should be included
in response to this item and, if such interest relates to more than five percent
of the class, such person should be identified. A listing of the shareholders of
an investment company registered under the Investment Company Act of 1940 or the
beneficiaries of an employee benefit plan, pension fund or endowment fund is not
required.
All foregoing shares are in fact owned by clients of
State Street Research & Management Company.
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SCHEDULE G
Item 7. Identification and Classification of the Subsidiary
Which Acquired the Security Being Reported on By the
Parent Holding Company.
If a parent holding company has filed this schedule,
pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an
exhibit stating the identity and the Item 3 classification of the relevant
subsidiary. If a parent holding company has filed this schedule pursuant to Rule
13d-1(c), attach an exhibit stating the identification of the relevant
subsidiary.
Inapplicable
Item 8. Identification and Classification of Members of the
Group.
If a group has filed this schedule pursuant to Rule
13d-1(b)(ii)(H), so indicate under Item 3(b) and attach an exhibit stating the
identity and Item 3 classification of each member of the group. If a group has
filed this schedule pursuant to Rule 13d-1(c), attach an exhibit stating the
identity of each member of the group.
Inapplicable
Item 9. Notice of Dissolution of Group
Inapplicable
Item 10. Certification
By signing below I certify that, to the best of my
knowledge and belief, the securities referred to above were acquired in the
ordinary course of business and were not acquired for the purpose of and do not
have the effect of changing or influencing the control of the issuer of such
securities and were not acquired in connection with or as a participant in any
transaction having such purposes or effect.
Signature
After reasonable inquire and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Date: February 10, 2001
Signature: /s/ Mary T. Lomasney
-------------------------------------
Name/Title: Mary T. Lomasney
Vice President/Director of Compliance
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