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(State or other jurisdiction of incorporation or organization) 

(Address of principal executive offices) 

[X] Annual Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 

Delaware 

10000 Energy Drive, Spring, Texas 

# Southwestern Energy Company 

# UNITED STATES SECURITIES AND EXCHANGE COMMISSION 

# For the fiscal year ended December 31, 2018 

(Exact name of registrant as specified in its charter) 

(Registrant’s telephone number, including area code) 

Securities registered pursuant to Section 12(b) of the Act: 

Washington, D.C. 20549 

# Form 10-K 

Commission file number 001-08246 

<img src='content_image/1025264.jpg'>

(832) 796-1000 

71-0205415 

(I.R.S. Employer Identification No.) 

77389 

(Zip Code) 

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Securities registered pursuant to Section 12(g) of the Act: None 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐ 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒ 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐ 

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐ 

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☐ 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. 

Large accelerated filer ☒ 

Accelerated filer ☐ 

Non-accelerated filer ☐ 

Smaller reporting company ☐ 

Emerging Growth Company ☐ 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒ 

The aggregate market value of the voting stock held by non-affiliates of the registrant was $3,096,452,639 based on the New York Stock Exchange – Composite Transactions closing price on June 30, 2018 of $5.30. For purposes of this calculation, the registrant has assumed that its directors and executive officers are affiliates. 

As of February 26, 2019, the number of outstanding shares of the registrant’s Common Stock, par value $0.01, was 541,319,293. 

Document Incorporated by Reference 

Portions of the registrant’s definitive proxy statement to be filed with respect to the annual meeting of stockholders to be held on or about May 21, 2019 are incorporated by reference into Part III of this Form 10-K. 

