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No insider purchase over the last 90 days. The latest, by Bertsch Jan, was filed 05 Sept 2013.
Sigma Aldrich Corp is a listed company. Its insiders report their share dealings to SEC (Form 4). The past year has been quiet: not a single insider filing for Sigma Aldrich Corp. The previous disclosure was published on 19 November 2015.
Over the whole record (from 2006), the tally stands at 22 purchases and 527 sales.
Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.
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