You are limited to the prior 8 quarters of 13F filings.
Subscribe to WhaleWisdom to view all filing data
for HANOVER INSURANCE GROUP, INC.
CSV Export Module
This will schedule a job to export all requested 13f holdings data for this filer.
When completed, an email will be sent to the email address you specify
containing a link to download the .zip file of the CSV file(s) you requested.