6. Disposition

On November 4, 2015, XOMA and Nanotherapeutics entered into an asset purchase agreement under which Nanotherapeutics agreed to acquire XOMA’s biodefense business and related assets (including, subject to government approval, certain contracts with the U.S. government), and to assume certain liabilities of XOMA. As part of the transaction, the parties entered into an intellectual property license agreement (the “Nanotherapeutics License Agreement”), under which XOMA agreed to license to Nanotherapeutics certain intellectual property rights related to the purchased assets. Under the Nanotherapeutics License Agreement, the Company is eligible to receive contingent consideration up to a maximum of $4.5 million in cash and 23,008 shares of common stock of Nanotherapeutics, based upon Nanotherapeutics achieving certain specified future operational objectives. In addition, the Company is eligible to receive 15% royalties on net sales of any future Nanotherapeutics products covered by or involving the related patents or know-how.

On March 17, 2016, the Company effected a novation of the NIAID Contract to Nanotherapeutics. On March 23, 2016, the Company completed the transfer of the NIAID Contract and certain related third-party service contracts and materials, and the grant of exclusive and non-exclusive licenses for certain of its patents and general know-how to Nanotherapeutics. The Company believes that the NIAID Contract and certain related third-party service contracts and materials related to the biodefense program transferred to Nanotherapeutics include a sufficient number of key inputs and processes necessary to generate output from a market participant’s perspective. Accordingly, the Company has determined that such assets qualify as a business. The transaction had no impact on the Company’s consolidated financial statements as of, and for the year ended, December 31, 2016.

In February 2017, the Company executed an Amendment and Restatement to both the asset purchase agreement and Nanotherapeutics License Agreement primarily to (i) remove Nanotherapeutics’ obligation to issue 23,008 shares to the Company of its common stock under the asset purchase agreement, and (ii) revise the payment schedule related to the timing of the $4.5 million cash payments due to the Company under the Nanotherapeutics License Agreement. Of the $4.5 million, $3.0 million is contingent upon Nanotherapeutics achieving certain specified future operating objectives. As of March 31, 2017, based on the payment terms pursuant to the amended Nanotherapeutics License Agreement, the Company was entitled to receive $1.6 million. Of the $1.6 million, the Company received $150,000 in March 2017, which was recognized as other income in the condensed consolidated statement of comprehensive loss. As the amended Nanotherapeutics License Agreement involves extended payment terms, the remaining $1.5 million, due in quarterly installments through September 2018 will be recognized as other income as the payments are received.