/usr/share/php/Horde/ is in php-horde-mime 2.9.3-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/Mime/
/usr/share/php/Horde/Mime.php
/usr/share/php/Horde/Mime/ContentParam/
/usr/share/php/Horde/Mime/ContentParam/Decode.php
/usr/share/php/Horde/Mime/Exception.php
/usr/share/php/Horde/Mime/Filter/
/usr/share/php/Horde/Mime/Filter/Encoding.php
/usr/share/php/Horde/Mime/Headers/
/usr/share/php/Horde/Mime/Headers.php
/usr/share/php/Horde/Mime/Headers/Addresses.php
/usr/share/php/Horde/Mime/Headers/AddressesMulti.php
/usr/share/php/Horde/Mime/Headers/ContentDescription.php
/usr/share/php/Horde/Mime/Headers/ContentId.php
/usr/share/php/Horde/Mime/Headers/ContentLanguage.php
/usr/share/php/Horde/Mime/Headers/ContentParam/
/usr/share/php/Horde/Mime/Headers/ContentParam.php
/usr/share/php/Horde/Mime/Headers/ContentParam/ContentDisposition.php
/usr/share/php/Horde/Mime/Headers/ContentParam/ContentType.php
/usr/share/php/Horde/Mime/Headers/ContentTransferEncoding.php
/usr/share/php/Horde/Mime/Headers/Date.php
/usr/share/php/Horde/Mime/Headers/Deprecated.php
/usr/share/php/Horde/Mime/Headers/Element/
/usr/share/php/Horde/Mime/Headers/Element.php
/usr/share/php/Horde/Mime/Headers/Element/Address.php
/usr/share/php/Horde/Mime/Headers/Element/Multiple.php
/usr/share/php/Horde/Mime/Headers/Element/Single.php
/usr/share/php/Horde/Mime/Headers/Extension/
/usr/share/php/Horde/Mime/Headers/Extension/Mime.php
/usr/share/php/Horde/Mime/Headers/Identification.php
/usr/share/php/Horde/Mime/Headers/MessageId.php
/usr/share/php/Horde/Mime/Headers/Mime.php
/usr/share/php/Horde/Mime/Headers/MimeVersion.php
/usr/share/php/Horde/Mime/Headers/Received.php
/usr/share/php/Horde/Mime/Headers/Subject.php
/usr/share/php/Horde/Mime/Headers/UserAgent.php
/usr/share/php/Horde/Mime/Id.php
/usr/share/php/Horde/Mime/Magic.php
/usr/share/php/Horde/Mime/Mail.php
/usr/share/php/Horde/Mime/Mdn.php
/usr/share/php/Horde/Mime/Part/
/usr/share/php/Horde/Mime/Part.php
/usr/share/php/Horde/Mime/Part/Iterator.php
/usr/share/php/Horde/Mime/Part/Upgrade/
/usr/share/php/Horde/Mime/Part/Upgrade/V1.php
/usr/share/php/Horde/Mime/QuotedPrintable.php
/usr/share/php/Horde/Mime/Related.php
/usr/share/php/Horde/Mime/Translation.php
/usr/share/php/Horde/Mime/Uudecode.php
/usr/share/php/Horde/Mime/mime.mapping.php