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Comfort Systems USA, Inc.

IndustrialsS&P 500

Comfort Systems USA, Inc. insider trading

Comfort Systems USA, Inc. files with the SEC as a Electrical Work company headquartered in Houston, TX. Every time one of its executives or directors buys or sells the stock, the filing appears here the moment it reaches the SEC — with grants and option exercises set apart from the trades that cost the insider their own money.

From SEC filings

Recent FIX insider transactions

7 insiders traded FIX on the open market between Apr 29, 2026 and Aug 26, 2026 — 13 sales worth $103M.

Bought
—
Sold
$103M

none on a 10b5-1 plan

Net
−$103M
Insiders
7

Open-market purchases (code P) and sales (code S) from Comfort Systems USA, Inc.'s own SEC Form 4 filings. Grants and option exercises are excluded — they are compensation, not decisions. Share counts are derived from the reported value and price. Verify any figure against the original filing before acting on it; this is monitoring, not advice.

Filing history last read from EDGAR on Sep 22, 2026. The live dashboard shows new filings the moment they clear.

Every FIX Form 4 on SEC.gov

SEC Form 4 data, Q3 2024 to Q2 2026

FIX insider trading by quarter

Between Jul 01, 2024 and Jun 30, 2026, 14 insiders traded FIX on the open market: 0 purchases and 55 sales worth $213.6M. In the last four quarters alone: 0 purchases and 37 sales ($166.4M), by 13 insiders.

QuarterBoughtSold
Q2 2026—−$59.7M9 sales
Q1 2026—−$56.8M10 sales
Q4 2025—−$25.4M7 sales
Q3 2025—−$24.4M11 sales
Q2 2025—−$20.4M8 sales
Q1 2025——
Q4 2024—−$17.9M6 sales
Q3 2024—−$8.9M4 sales
Largest sale
−$21.9M of FIX by Lane Brian E. (Chief Executive Off. · Director) on May 05, 2026.

Open-market transactions through Jun 30, 2026most recent first

  • George William III

    Chief Financial Officer

    −$2M

    May 11, 2026

    1,000 sh · $2,020.97

  • George William III

    Chief Financial Officer

    −$7.8M

    May 08, 2026

    4,000 sh · $1,948.17

  • Myers Franklin

    Director

    −$8.6M

    May 07, 2026

    4,500 sh · $1,902.57

  • Lane Brian E.

    Chief Executive Off. · Director

    −$21.9M

    May 05, 2026

    11,113 sh · $1,969.84

  • Sandbrook William J

    Director

    −$2.6M

    Apr 29, 2026

    1,500 sh · $1,732.67

  • Anderson Darcy

    Director

    −$6.2M

    Mar 03, 2026

    4,500 sh · $1,369.74

  • Shaeff Julie

    Chief Accounting Officer

    −$3.2M

    Mar 03, 2026

    2,287 sh · $1,382.15

  • Reed Terrence

    SVP & CHRO

    −$1.6M

    Mar 03, 2026

    1,116 sh · $1,397.33

  • Lane Brian E.

    President/chief Executive Off. · Director

    −$13.6M

    Feb 25, 2026

    9,365 sh · $1,453.12

  • Myers Franklin

    Director

    −$12.7M

    Feb 25, 2026

    8,636 sh · $1,472.56

  • Sandbrook William J

    Director

    −$3.6M

    Feb 24, 2026

    2,500 sh · $1,443.32

  • Skidmore Constance Ellen

    Director

    −$1.4M

    Feb 24, 2026

    1,000 sh · $1,425.00

  • Reed Terrence

    SVP & CHRO

    −$977.8K

    Feb 24, 2026

    671 sh · $1,457.17

  • George William III

    Chief Financial Officer

    −$12.9M

    Feb 23, 2026

    9,000 sh · $1,434.97

  • Mercado, Pablo G.

    Director

    −$702.5K

    Feb 23, 2026

    500 sh · $1,405.00

From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.

Comfort Systems USA, Inc. company record

SEC industry classification
Electrical Work
Headquarters
Houston, TX
Listed on
NYSE
SEC Central Index Key
0001035983

Sourced from this company's own SEC submissions record. The industry label is SEC's Standard Industrial Classification, which is more specific than the Industrials sector shown above.

After insiders bought FIX

What the stock actually did in the 90 days following each open-market purchase

Don't check FIX — let it ping you

Get told the moment an insider moves on FIX

Pro watches Comfort Systems USA, Inc. for you and sends a Telegram ping within moments of a Form 4 clearing EDGAR — a C-suite open-market buy, a cluster, a 10b5-1 regime break — long before it reaches the press. Add FIX to a watchlist, see each mover's benchmark-measured track record and which legendary funds hold it, and read the full filing history instead of the last 72 hours.

Track FIX on the live dashboardFilings on SEC.gov

The live dashboard is free to open. Alerts, watchlists, full filing history and each mover's benchmark-measured track record are Pro. Monitoring, not advice.

How to read FIX insider activity

Open-market purchase (code P)
An insider spending their own money at market price. This is the only buy code that reliably carries signal — it is a decision, not compensation.
Grants and option exercises (codes A, M)
Scheduled compensation. Most "insider buying" headlines are really this, which is why InsiderPulse weights it at a fraction of a real purchase.
Cluster buy
Two or more different insiders buying on the open market in the same window. One executive buying can mean anything; three is much harder to explain away.

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This week on the tape: who actually chose to sellThe weekly split of scheduled 10b5-1 selling vs deliberate sales, with the deciders named.

Questions

Are FIX insiders buying or selling?
Between Apr 29, 2026 and Aug 26, 2026, 7 Comfort Systems USA, Inc. insiders made no open-market purchases and 13 sales worth $103M, a net sale of $103M.
How much FIX stock have insiders bought and sold in the last two years?
Between Jul 01, 2024 and Jun 30, 2026, 14 Comfort Systems USA, Inc. insiders made no open-market purchases and 55 sales worth $213.6M. In the four quarters to Jun 30, 2026: no purchases and 37 sales ($166.4M). The largest sale was Lane Brian E. selling $21.9M on May 05, 2026.
What was the largest recent FIX insider trade?
Lane Brian E. (Chief Executive Off. · Director) sold $25.8M of FIX stock on Aug 26, 2026 at about $1608.21 a share.
When did an insider last buy FIX shares?
No open-market purchase by a Comfort Systems USA, Inc. insider appears in the filings from Apr 29, 2026 to Aug 26, 2026 — every recorded open-market transaction in that period was a sale.
Where does FIX insider trading data come from?
From the Form 4 filings Comfort Systems USA, Inc.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.

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