UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

(Mark one)

For the quarterly period ended December 31, 2014

or

For the transition period from                      to                     

Commission File Number: 000-55301

Lynden Energy Corp.

(Exact name of registrant as specified in its charter)

(604) 629-2991

(Registrant’s telephone number, including area code)

(Former name, former address and former fiscal year, if changed since last report)

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  x

Indicate by check mark whether the registrant has submitted electronically and posted to its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Registration S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

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

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

The registrant had 130,198,411 shares of common stock outstanding at February 12, 2015.

EXPLANATORY NOTE

On February 17, 2015, Lynden Energy Corp. filed its Quarterly Report on Form 10-Q for the quarterly period ended December 31, 2015 (the “Original Report”). This Amendment No. 1 on Form 10-Q/A to the Original Report (this “Form 10-Q/A”) is being filed solely for the purpose of furnishing Exhibit 101 to the Original Report, which contains the XBRL Interactive Data Files required by Rule 405 of Regulation S-T, by amending the Exhibit Index under Item 6 of Part II of the Original Report. As permitted by Rule 405(a)(2)(ii) of Regulation S-T, Exhibit 101 is required to be furnished by amendment within 30 days of the original filing date of the Original Report.

Except as described above, this Form 10-Q/A does not amend or update any information contained in the Original Report to reflect events occurring subsequent to the original filing date or otherwise.

See Exhibit Index on page 3 of this Quarterly Report on Form 10-Q.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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EXHIBIT INDEX

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