[4] The non-governmental organization VoteWatch named Caspary the second-most influential MEP in EU trade policy in November 2016.

[17] In November 2008, Caspary was among those members of the European Parliament who witnessed the terror attacks on the Taj Mahal Palace Hotel in Mumbai, India.

In the negotiations to form a fourth coalition government under the leadership of Chancellor Angela Merkel following the 2017 federal elections, he was part of the working group on European affairs, led by Peter Altmaier, Alexander Dobrindt and Achim Post.

[19] In the negotiations to form a coalition government under the leadership of Minister-President of Baden-Württemberg Winfried Kretschmann following the 2021 state elections, Caspary co-chaired the working group on European and international affairs, alongside Theresa Schopper.

[20][21] Ahead of the 2021 national elections, Caspary endorsed Armin Laschet as the Christian Democrats' joint candidate to succeed Chancellor Angela Merkel.

[22] In April 2017, Caspary and nine further MEPs from the European People's Party introduced an initiative to monitor and control investments in strategic sectors in the EU by investors from third countries.

[25] In a plenary speech in April 2017, he emphasised the need for adequate answers to enable MEPs to exercise their oversight function over the European Commission.

[28] In March 2013, he initiated the event series ‘Friends of TTIP’ as a platform for open and controversial discussion for representatives from politics, industries and civil society.

[33] In November 2016, the non-governmental organization VoteWatch named Caspary the second-most influential MEP in EU trade policy.