VMware hasn't owned SpringSource since Pivotal was created in 2013 https://en.wikipedia.org/wiki/SpringSource (i.e. "the Spring framework is owned by Dell" is still accurate, but not through Dell owning VMware)
Pivotal is mostly owned by Dell/EMC (60%), followed by VMware (22.5%), and the balance by GE (10%), Ford (5%) and Microsoft (2.5%). The percentages are educated guesses based on the original 70/30 split EMC-VMware.
The reason I think is that a lot of the of the revenue producing assets came from EMC (Pivotal Labs and Greenplum), VMware had SpringSource & GemFire which were decent revenue, but Cloud Foundry made no money until 2014+ (and now accounts for a large chunk of revenue).
VMware hasn't owned SpringSource since Pivotal was created in 2013 https://en.wikipedia.org/wiki/SpringSource (i.e. "the Spring framework is owned by Dell" is still accurate, but not through Dell owning VMware)