<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Mon Sep 28 21:30:26 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="ck0001579881_S000085632Member" xlink:href="ck0001579881-20260930.xsd#ck0001579881_S000085632Member"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="ck0001579881_S000085632Member_lbl" xml:lang="en-US">Calamos Russell 2000 Structured Alt Protection ETF - October</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001579881_S000085632Member" xlink:to="ck0001579881_S000085632Member_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ck0001579881_S000085632Member_lbl0" xml:lang="en-US">S000085632 Member</label>
<!-- [WMV7][wgzsu+g7nJHXeRylfnWXDz/XDdi++CARCgtolczq/Uuxsisc3v6p+rjJC0Jj5oTEKoZspGBrkLAUuDfbYgrTCbmAnyaKJ/uW4+hOzz5lBrVAI9SHA+ta1H3fmUK8mZPoUHZAn0uAydUmQG9/C+NmvyL3hnqHiGMsLr+5llfQVvszoiK1ci/lg5NRJ0kIniqJbZ94SbzMEjnNg3woeg+6at2c7+FV4Hgvo2g6/KFOLcxe8OnWOmothBxce20np0WisevftKRROO/TktSbToGmKhpDFRx9NKD7zCgmb8lKC4Mc5T1wvBTkT54CsSPew8G7SBNPLrWS8f6vBm+xrqWyB0/JFyb43ix3O1pf] CSR-->
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001579881_S000085632Member" xlink:to="ck0001579881_S000085632Member_lbl0"/>
  </labelLink>
</linkbase>
