Endologix
ENDOLOGIX INC /DE/ (Form: SC 13G/A, Received: 02/15/2017 07:08:59)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. 1)*

Endologix, Inc.
(Name of Issuer)

Common Stock
(Title of Class of Securities)

292266S106
(CUSIP Number)

December 31, 2016
(Date of Event which Requires
Filing of this Statement)

Check the appropriate box to designate the rule pursuant to
which this Schedule is filed:

[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's 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).

CUSIP No. 292266S106    SCHEDULE 13G    Page 2 of 8


1       Names of Reporting Persons

        Tamarack Advisers, LP

        IRS Identification No. of Above Person (entities only)

        47-4492240

2       Check the Appropriate Box if a Member of a Group
                        (a)     [ ]
        (See instructions)      (b)     [ ]

3       SEC USE ONLY


4       Citizenship or Place of Organization

                Delaware

                        5       Sole Voting Power

                                0

        NUMBER OF       6       Shared Voting Power
        SHARES
        BENEFICIALLY                    0
        OWNED BY EACH
        REPORTING       7       Sole Dispositive Power
        PERSON WITH
                                0

                8       Shared Dispositive Power

                                0

9       Aggregate Amount Beneficially Owned by each Reporting
Person

        0

10      Check if the Aggregate Amount in Row (9) Excludes Certain
Shares (see instructions)       [ ]

11      Percent of Class Represented by Amount in Row 9

        0%

12      Type of Reporting Person (See Instructions)

        IA


CUSIP No. 292266S106    SCHEDULE 13G    Page 3 of 8


1       Names of Reporting Persons

        Tamarack Capital GP, LLC

        IRS Identification No. of Above Person (entities only)

        47-4492240

2       Check the Appropriate Box if a Member of a Group
                        (a)     [ ]
        (See instructions)      (b)     [ ]

3       SEC USE ONLY


4       Citizenship or Place of Organization

                Delaware

                        5       Sole Voting Power

                                0

        NUMBER OF       6       Shared Voting Power
        SHARES
        BENEFICIALLY                    0
        OWNED BY EACH
        REPORTING       7       Sole Dispositive Power
        PERSON WITH
                                0

                8       Shared Dispositive Power

                                0

9       Aggregate Amount Beneficially Owned by each Reporting
Person

        0

10      Check if the Aggregate Amount in Row (9) Excludes Certain
Shares (see instructions)       [ ]

11      Percent of Class Represented by Amount in Row 9

        0%

12      Type of Reporting Person (See Instructions)

        HC


CUSIP No. 292266S106    SCHEDULE 13G    Page 4 of 8


1       Names of Reporting Persons

        Justin J. Ferayorni

        IRS Identification No. of Above Person (entities only)

        -----------

2       Check the Appropriate Box if a Member of a Group
                        (a)     [ ]
        (See instructions)      (b)     [ ]

3       SEC USE ONLY


4       Citizenship or Place of Organization

                United States

                        5       Sole Voting Power

                                0

        NUMBER OF       6       Shared Voting Power
        SHARES
        BENEFICIALLY                    0
        OWNED BY EACH
        REPORTING       7       Sole Dispositive Power
        PERSON WITH
                                0

                8       Shared Dispositive Power

                                0

9       Aggregate Amount Beneficially Owned by each Reporting
Person

        0

10      Check if the Aggregate Amount in Row (9) Excludes Certain
Shares (see instructions)       [ ]

11      Percent of Class Represented by Amount in Row 9

        0%

12      Type of Reporting Person (See Instructions)

        IN


CUSIP No. 292266S106    SCHEDULE 13G    Page 5 of 8


Item 1(a).      Name of Issuer.

        Endologix, Inc.

Item 1(b).      Address of Issuer's Principal Executive Offices.

        2 Musick, Irvine, California 92618

Item 2(a).      Name of Person Filing.

        Tamarack Advisers, LP, Tamarack Capital GP, LLC, and
Justin J. Ferayorni

Item 2(b).      Address of Principal Business Office or, if none,
Residence.

        The business address of Tamarack Advisers, LP, Tamarack
Capital GP, LLC, and Justin J. Ferayorni is 5050 Avenida
Encinas, Suite 360, Carlsbad, CA  92008.

Item 2(c).      Citizenship.

        Tamarack Advisers, LP is a Delaware limited Partnership,
Tamarack Capital GP, LLC is a Delaware limited liability
company, and Justin J. Ferayorni is a United States citizen.

Item 2(d).      Title of Class of Securities.

        Common Stock

Item 2(e).      CUSIP Number.
        292266S106

Item 3. If this statement is filed pursuant to 240.13d-
1(b) or 240.13d-2(b) or (c), check whether the person filing
is a:

(a)  [ ] Broker or dealer registered under section 15 of the
Act (15 U.S.C. 78o).

(b)  [ ] Bank as defined in section 3(a)(6) of the Act (15
U.S.C. 78c).

(c)  [ ] Insurance company as defined in section 3(a)(19) of
the Act (15 U.S.C. 78c).


CUSIP No. 292266S106    SCHEDULE 13G    Page 6 of 8


(d)  [ ] Investment company registered under section 8 of the
Investment Company act of 1940 (15 U.S.C. 80a-8).

(e)  [X] An investment adviser in accordance with 240.13d-
1(b)(1)(ii)(E). (for Tamarack Advisers, LP)

(f)  [ ] An employee benefit plan or endowment fund in
accordance with 240.13d-1(b)(1)(ii)(F).

(g)  [X] A parent holding company or control person in
accordance with 240.13d-1(b)(1)(ii)(G). (for Tamarack Capital
GP, LLC and Mr. Ferayorni)

(h)  [ ] A savings association as defined in Section 3(b) of
the Federal Deposit Insurance Act (12 U.S.C. 1813).

(i)  [ ] A church plan that is excluded form the definition
of an investment company under section 3(c)(14) of the
Investment Company act of 1940 (15 U.S.C. 80a-3).

(j)  [ ] A non-U.S. institution in accordance with Rule
240.13d-1(b)(1)(ii)(J);

(K)  [ ] Group, in accordance with 240.13d-1(b)(1)(ii)(K).
If filing as a non-U.S. institution in accordance with Rule
240.13d-1(b)(1)(ii)(J), please specify the type of
institution: ______

Item 4. Ownership.

        Reference is hereby made to Items 5-9 and 11 of pages two
(2), three(3), and four(4) of this Schedule 13G, which Items
are incorporated by reference herein.

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 [x].



CUSIP No. 292266S106    SCHEDULE 13G    Page 7 of 8


Item 6. Ownership of More Than Five Percent on Behalf of
Another Person.

        Not applicable.

Item 7. Identification and Classification of the
Subsidiary which Acquired the Security Being Reported on by
the Parent Holding Company or Control Person.

        Not applicable.

Item 8. Identification and Classification of Members of
the Group.

        Not applicable.

Item 9. Notice of Dissolution of Group.

        Not applicable.

Item 10.        Certification.

        By signing below, Justin J. Ferayorni certifies that, to
the best of his knowledge and belief, the securities referred
to above on page two (2) of this Schedule 13G were acquired
and are held in the ordinary course of business and were not
acquired and are not held for the purpose of or with the
effect of changing or influencing the control of the issuer
of the securities and were not acquired and are not held in
connection with or as a participant in any transaction having
that purpose or effect.



CUSIP No. 292266S106    SCHEDULE 13G    Page 8 of 8


Signature


        After reasonable inquiry and to the best of his knowledge
and belief, the undersigned certify that the information set
forth in this statement is true, complete and correct.


DATED:  February 8, 2017

        Tamarack Advisers, LP


        /s/ Justin J. Ferayorni
        ________________________
        By:  Justin J. Ferayorni
        its:    Managing Member of its General
                Partner



        Tamarack Capital GP, LLC


        /s/ Justin J. Ferayorni
        ________________________
        By:  Justin J. Ferayorni
        its: Managing Member



        Justin J. Ferayorni


        /s/ Justin J. Ferayorni
        ________________________
        By:  Justin J. Ferayorni

Attention: Intentional misstatements or omissions of fact
constitute Federal criminal violations (See 18 U.S.C. 1001)