X0305 4 2012-05-29 0001112412 ENDEAVOUR INTERNATIONAL CORP END 0001133521 STEELHEAD PARTNERS LLC 333 108TH AVE. NE BELLEVUE WA 98004 0 0 0 1 See footnotes 0001327721 JOHNSTON JAMES MICHAEL 333 108TH AVE. NE BELLEVUE WA 98004 0 0 0 1 See footnotes 0001327722 KLEIN BRIAN KATZ 333 108TH AVE. NE BELLEVUE WA 98004 0 0 0 1 See footnotes Common Stock 2012-05-29 4 S 0 6000 6.4566 D 4106106 I See footnotes (1) (2) (3) (4) Common Stock 2012-05-29 4 S 0 45653 6.406 D 4060453 I See footnotes (1) (2) (3) (4) Common Stock 2012-05-30 4 S 0 1957 6.147 D 4058496 I See footnotes (1) (2) (3) (4) Common Stock 2012-05-31 4 S 0 83443 9.6116 D 3975053 I See footnotes (1) (2) (3) (4) The reporting persons are: (i) Steelhead Partners, LLC ("Steelhead"), a registered investment advisor within the meaning of Rule 16a-1(a)(1)(v) under the Securities Exchange Act of 1934; and (ii) each of James Michael Johnston and Brian Katz Klein, Steelhead's member-managers. 3,881,087 shares of common stock reported in Table I on this Form 4 are beneficially held by Steelhead Navigator Master, L.P. ("Steelhead Navigator"). The balance of the shares reported on this Form 4 is beneficially held by certain client accounts, none of which, other than Steelhead Navigator, is itself the beneficial owner of more than 10% of the issuer's common stock (collectively with Steelhead Navigator, the "Funds"). Steelhead serves as the general partner and/or investment manager of the Funds. As a greater than 10% beneficial owner, Steelhead Navigator is separately reporting its holdings in the issuer's securities on a Form 4 filed concurrently herewith. Each of Steelhead, Mr. Johnston, Mr. Klein and the Funds expressly disclaims beneficial ownership in these securities, except to the extent of their respective pecuniary interests therein. Steelhead and the other reporting persons may be deemed to beneficially own the securities owned by the Funds insofar as they may be deemed to have the power to direct the voting or disposition of such securities. The reporting persons have elected therefore to file this Form 4 voluntarily to report the Funds' holdings on an aggregate basis, notwithstanding the reporting exemption applicable to registered investment advisors under Rule 16a-1(a)(1)(v) and to control persons under Rule 16a-1(a)(1)(vii). The filing of this Form 4 should not, however, be deemed an admission by any of the reporting persons that such person falls outside the scope of the foregoing exemptions, or that the reporting persons and/or the Funds form a group within the meaning of Rule 16a-1(a)(1). Steelhead Partners, LLC; By: Brent Binge, General Counsel; /s/ Brent Binge 2012-05-31 /s/ Brent Binge, Attorney-In-Fact for J. Michael Johnston 2012-05-31 /s/ Brent Binge, Attorney-In-Fact for Brian K. Klein 2012-05-31