Questione giuridica chiave
Whether the respondent was obligatorily insured with Winterthur-Columna from 1 October 1998 to 9 April 1999.
Decisione estratta
Yes. The respondent was employed by Firma X. AG and therefore subject to mandatory occupational pension coverage during the relevant period.
Motivazione estratta
The Court relied on contemporaneous documents, especially employer and administrative records, which consistently pointed to Firma X. AG as the employer. Later contradictory statements were less persuasive. Any alleged internal agency relationship with Firma Y. AG did not alter the legal effect toward the respondent.