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EdgarHawk

SANDBROOK WILLIAM J

Director

Director

Latest: Director selling · April 2026

3 filings analyzed · 1 company · Latest 2026-04-30

Companies

Company Buys Sells Direction
COMFORT SYSTEMS USA INC FIX 0 5 Net selling

Activity

April 2026
medium
Sell
1,500 shares
$2,599,000
Significance 4/10

Director William J Sandbrook sells ~1,500 shares of Comfort Systems USA for $2.6M amid strong stock rally

William J Sandbrook, a director at Comfort Systems USA, sold a meaningful stake worth $2.6 million at a time when the stock has rallied sharply over recent months. The company itself is fundamentally sound—profitable with accelerating revenue growth and strong quarterly momentum—which makes this sale particularly notable as a case of a director harvesting gains rather than expressing concern about the business. The timing is revealing: Sandbrook is selling into strength, after the stock has already run up substantially, suggesting he may be taking a disciplined approach to rebalancing his concentrated position. This type of profit-taking by a director at elevated levels is routine and typically reflects portfolio management rather than insider alarm about company prospects. However, the scale of the sale relative to his holdings warrants noting as part of a broader pattern if other insiders follow suit.

February 2026
medium
Sell
2,500 shares
$3,608,294
Significance 6/10

Director William J Sandbrook sold 2,500 FIX shares for $3,608,294.25; stock up 47.2% in 90d, tracking a +37.9% avg 90d return on his prior 4 sells

Director Sandbrook sold 2,500 shares at $1,443.32, reducing his holdings by 21.4%, as Comfort Systems USA shares rallied 47.2% over 90 days and 23.9% over 30 days from the trade date. His same-ticker history shows 4 prior sales at FIX spanning September 2023 to September 2025, with measured outcomes of +34.1%, +39.6%, and +40.2% at the 90-day mark—none of which represent favorable exit timing, since positive returns after a sale indicate the insider sold before the upturn. His cross-ticker track record reports an average 90-day return of +37.9% following 4 prior sells, with a well-timed rate of 0.00%, meaning none of his historical sales occurred before subsequent declines. The current sale occurs near the 52-week high ($1,468.58), in an environment where FIX has demonstrated sustained momentum, yet the director's prior pattern at this ticker does not show evidence of timing sales into stock weakness.

September 2025
medium
Sell
1,500 shares
$1,082,829
Significance 4/10

Director William J. Sandbrook sold 1,500 shares of Comfort Systems USA (FIX) for $1,082,828.64 across three transactions at blended average price of $721.89.

Director William J. Sandbrook executed 3 separate sales totaling 1,500 shares for $1,082,828.64 on September 9–10, 2025, reducing his holdings by 11.4% from 13,166 to 11,666 shares. The sales occurred at prices ranging from $706.00 to $733.56, well below the current price of $752.10 and near the 52-week high of $752.10. At the same ticker, Sandbrook's 1 prior sale (September 2023) showed a 90d return of +4.6%, indicating the stock rose after his previous sale—a pattern of poorly-timed exits. The company reports strong fundamentals: $2.2B quarterly revenue, 35.0% annual revenue growth, and $230.8M net income, though the elevated P/E of 38.33 reflects high valuation expectations. The sale occurred as the stock rallied 8.5% over 30 days and 50.0% over 90 days, suggesting the director sold into strength rather than distress.

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