SEC Insider Transactions from SANDBROOK WILLIAM J.

Last updated: 2026-03-14 11:52 UTC | Total transactions: 10

William J. Sandbrook sold Comfort Systems USA Inc. ($FIX) shares on the open market five times in the last 365 days, totaling about $5.2 million. His most recent sale occurred on February 24, 2026. These sales rank 1,886th among 11,678 individual insiders in our database, where the average is $8.6 million across about 6.4 transactions. Sandbrook made no open market purchases during this period.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Feb. 24, 2026 COMFORT SYSTEMS USA INC $FIX SANDBROOK WILLIAM J Not found S Common Stock 2500 $1443.32 9,166.0000 35,413,000 21.43% 0.01%
Sept. 9, 2025 COMFORT SYSTEMS USA INC $FIX SANDBROOK WILLIAM J Not found S Common Stock 600 $708.97 12,566.0000 35,369,000 4.56% 0.00%
Sept. 9, 2025 COMFORT SYSTEMS USA INC $FIX SANDBROOK WILLIAM J Not found S Common Stock 100 $706.00 12,466.0000 35,369,000 0.80% 0.00%
Sept. 10, 2025 COMFORT SYSTEMS USA INC $FIX SANDBROOK WILLIAM J Not found S Common Stock 800 $733.56 11,666.0000 35,369,000 6.42% 0.00%
Aug. 25, 2025 COMFORT SYSTEMS USA INC $FIX SANDBROOK WILLIAM J Not found S Common Stock 700 $689.58 13,166.0000 35,369,000 5.05% 0.00%
May 22, 2025 Knife River Corp $KNF SANDBROOK WILLIAM J Director A Common Stock 1551 $0.00 5,695.0000 57,083,497 37.43% 0.00%
May 16, 2025 COMFORT SYSTEMS USA INC $FIX SANDBROOK WILLIAM J Not found A Common Stock 342 $0.00 13,866.0000 35,605,000 2.53% 0.00%
May 17, 2024 COMFORT SYSTEMS USA INC $FIX SANDBROOK WILLIAM J Not found A Common Stock 498 $0.00 13,524.0000 35,828,000 3.82% 0.00%
May 15, 2024 Knife River Corp $KNF SANDBROOK WILLIAM J Director A Common Stock 1905 $0.00 3,424.0000 57,040,840 125.41% 0.00%
May 15, 2024 Knife River Corp $KNF SANDBROOK WILLIAM J Director A Common Stock 720 $77.19 4,144.0000 57,040,840 21.03% 0.00%