SANDBROOK WILLIAM J — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

SANDBROOK WILLIAM J has filed 2 SEC Form 4 filings across 2 companies in the last 90 days — selling. Lifetime open-market sales: $5.17M.

Profile

SANDBROOK WILLIAM J
RoleDirector
Notability30/100

Board memberships

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-05-21KNFKnife River CorpA — Grant or award2.0K$0.00
2026-05-19FIXCOMFORT SYSTEMS USA INCA — Grant or award105$0.00
2026-02-26FIXCOMFORT SYSTEMS USA INCS — Open-market sale2.5K$1,443.32$3.61M
2025-09-09FIXCOMFORT SYSTEMS USA INCS — Open-market sale800$733.56$587K
2025-09-09FIXCOMFORT SYSTEMS USA INCS — Open-market sale100$706.00$71K
2025-09-09FIXCOMFORT SYSTEMS USA INCS — Open-market sale600$708.97$425K
2025-08-25FIXCOMFORT SYSTEMS USA INCS — Open-market sale700$689.58$483K
2025-05-16FIXCOMFORT SYSTEMS USA INCA — Grant or award342$0.00

Companies — Last 90 Days

Frequently Asked Questions

Who is SANDBROOK WILLIAM J?

SANDBROOK WILLIAM J is a corporate insider — currently tracked as Director of Knife River Corp (KNF). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has SANDBROOK WILLIAM J submitted recently?

2 primary Form 4 filings in the last 90 days, covering 2 companies.

Has SANDBROOK WILLIAM J been buying or selling stock?

Recorded transactions: 0 open-market purchases () and 5 open-market sales ($5.17M) across all tracked filings.

Where can I see all of SANDBROOK WILLIAM J's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

Open the live SANDBROOK WILLIAM J profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.