Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Corvex Management LP

2. Date of Event Requiring Statement (MM/DD/YYYY) 8/11/2017

3. Issuer Name and Ticker or Trading Symbol

ENERGEN CORP [EGN]

(Last) (First) (Middle)

667 MADISON AVENUE

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director ___ X ___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

NEW YORK, NY 10065

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	9790768	I	See Footnotes ⁽¹⁾ ⁽²⁾

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Call Options (obligation to sell)	⁽³⁾	10/20/2017	Common Stock	415200	$60.00	I	See Footnotes ⁽¹⁾ ⁽²⁾ ⁽⁴⁾
Put Options (obligation to buy)	⁽³⁾	1/19/2018	Common Stock	415200	$40.00	I	See Footnotes ⁽¹⁾ ⁽²⁾ ⁽⁵⁾

Explanation of Responses:
(1)	Shares of common stock (the "Shares") of Energen Corporation (the "Issuer") held for the accounts of certain private investment funds for which Corvex Management LP ("Corvex") acts as investment adviser, including Corvex Master Fund, LP and Corvex Select Equity Master Fund LP (collectively, the "Corvex Funds"). The general partner of Corvex is controlled by Mr. Meister.
(2)	For purposes of Section 16 of the Securities Exchange Act of 1934, each of Corvex and Mr. Meister disclaims beneficial ownership of the securities of the Issuer held directly by the Corvex Funds except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that any of Corvex or Mr. Meister is the beneficial owner of such securities for purposes of Section 16 or any other purpose.
(3)	These options were exercisable immediately upon issuance.
(4)	Represents listed American-style call options sold by Corvex on behalf of the Corvex Funds.
(5)	Represents listed American-style put options sold by Corvex on behalf of the Corvex Funds.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Corvex Management LP 667 MADISON AVENUE NEW YORK, NY 10065		X
Meister Keith A. 667 MADISON AVENUE NEW YORK, NY 10065		X

Signatures
CORVEX MANAGEMENT LP, Name: /s/ Keith Meister, Title: Managing Partner		8/16/2017
^** Signature of Reporting Person		Date
KEITH MEISTER, Name: /s/ Keith Meister		8/16/2017
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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