Insiders who reported open-market trades in the last 12 months at the companies William J. Sandbrook files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Brian E. Lane - $68.05M in FIX purchases and sales in the last 12 months
Franklin Myers - $52.10M in FIX purchases and sales in the last 12 months
William George III - $31.67M in FIX purchases and sales in the last 12 months
Darcy Anderson - $10.00M in FIX purchases and sales in the last 12 months
Julie Shaeff - $5.41M in FIX purchases and sales in the last 12 months
Pablo G. Mercado, - $4.11M in FIX purchases and sales in the last 12 months
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William J. Sandbrook is a corporate insider, tracked as Director of Knife River Corp (KNF). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did William J. Sandbrook last file a Form 4?
The most recent primary Form 4 on record is dated 21 May 2026, one of 6 filings going back to 2025.
Has William J. Sandbrook been buying or selling stock?
Recorded transactions: 0 open-market purchases and 5 open-market sales ($5.17M) across all tracked filings.
William J. Sandbrook is Director of Knife River Corp (KNF). 6 SEC Form 4 filings on record going back to 2025, most recently on 21 May 2026. Most recent open-market trade: sold $3.61M of FIX on 26 February 2026. Lifetime open-market sales: $5.17M.
Recent transactions
8
The latest 8 SEC Form 4 transactions reported by William J. Sandbrook.
InsiderAlpha's records for William J. Sandbrook go back to 2025: 6 primary Form 4 filings, an average of 3.0 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
