William J. Sandbrook

This profile gathers the share dealings of William J. Sandbrook across 3 companies, led by Comfort Systems USA Inc, Knife River Corp and U.s. Concrete, Inc. We count 17 filings; the first trade dates from 27 January 2016 and the latest from 29 April 2026.

Sales make up the whole of the open-market record (8 sales, €8.2M). The totals do not cover 2 filings with an undisclosed amount. The rest of the record consists of 8 share grants. In 2026 alone, the filings show no purchases and 2 sales.

On 30 April 2026 came the latest disclosure, an open-market sale for €2.2M in Comfort Systems USA Inc. Typically, a trade is published a median of 2 days after it takes place. US insiders must file a Form 4 within two business days of a trade. A sale on its own says little: insiders also sell to pay tax, fund a purchase or diversify. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.