Robert H. Mayer

This profile gathers the share dealings of Robert H. Mayer in Martek Biosciences Corp. We count 5 filings; the first trade dates from 6 March 2009 and the latest from 25 February 2011.

None of the filings is a plain purchase or sale on the open market; they cover grants, option exercises and other movements. Such operations are usually part of compensation schedules, which makes them a weaker signal than an open-market trade.

The record was last updated on 1 March 2011 with a share grant in Martek Biosciences Corp. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 4 days. US insiders must file a Form 4 within two business days of a trade. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.