JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)
Exhibit 99.6
PURSUANT TO RULE 13d-1(k)
The undersigned acknowledge and agree that the foregoing statement on Schedule 13D in respect of the common stock, $0.0001 par value of Alexza Pharmaceuticals, Inc. is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D may be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein or therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.
EXECUTED this 26th day of February, 2016.
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GRUPO XXXXXX INTERNACIONAL, S.A.
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/s/ Xxxxx Xxxxxxxx Massana
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XXXXX XXXXXXXX XXXXXXX
Chief Executive Officer
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XXXXXX XXXXXX-XXXXX
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/s/ Xxxxxx Xxxxxx-Xxxxx
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