Comfort Systems USA insider activity
What the executives and directors of Comfort Systems USA actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.
−$185M
net open-market flow, 12 m
0 open-market buys, 12 m
0%
of sale value on 10b5-1 plans, 12 m
1,020 days since an insider bought, whole record
The tape: three years of insider trades
Open-market buy
Discretionary sale
Planned sale (10b5-1)
Reported-price path
Routine
Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling.
The 82 routine events on the chart, as a list
| Date | Insider | Shares |
|---|---|---|
| May 21, 2026 | MYERS FRANKLIN | 378 |
| May 18, 2026 | ANDERSON DARCY | 105 |
| May 18, 2026 | BULLS HERMAN E | 105 |
| May 18, 2026 | SANDBROOK WILLIAM J | 105 |
| May 18, 2026 | Mercado, Pablo G. | 105 |
| May 18, 2026 | Skidmore Constance Ellen | 105 |
| May 18, 2026 | Kapoor Gaurav | 105 |
| May 18, 2026 | Wallis-Lage Cindy L. | 105 |
| May 18, 2026 | Hardy Rhoman J | 105 |
| May 7, 2026 | MYERS FRANKLIN | 512 |
| Apr 1, 2026 | GEORGE WILLIAM III | 1,081 |
| Apr 1, 2026 | Shaeff Julie | 232 |
| Apr 1, 2026 | Trent T McKenna | 817 |
| Apr 1, 2026 | Lane Brian E. | 3,599 |
| Apr 1, 2026 | Reed Terrence | 273 |
| Apr 1, 2026 | Eslicker Rachel R. | 99 |
| Mar 23, 2026 | GEORGE WILLIAM III | 1,661 |
| Mar 23, 2026 | Shaeff Julie | 498 |
| Mar 23, 2026 | Trent T McKenna | 1,932 |
| Mar 23, 2026 | Lane Brian E. | 6,098 |
| Mar 23, 2026 | Reed Terrence | 519 |
| Mar 23, 2026 | Eslicker Rachel R. | 217 |
| Feb 23, 2026 | GEORGE WILLIAM III | 9,000 |
| Dec 3, 2025 | MYERS FRANKLIN | 270 |
| Dec 1, 2025 | GEORGE WILLIAM III | 5,279 |
| Nov 14, 2025 | BULLS HERMAN E | 800 |
| Aug 8, 2025 | GEORGE WILLIAM III | 8,436 |
| Aug 5, 2025 | MYERS FRANKLIN | 97 |
| Jun 2, 2025 | MYERS FRANKLIN | 500 |
| May 16, 2025 | ANDERSON DARCY | 342 |
| May 16, 2025 | BULLS HERMAN E | 342 |
| May 16, 2025 | MYERS FRANKLIN | 342 |
| May 16, 2025 | SANDBROOK WILLIAM J | 342 |
| May 16, 2025 | Mercado, Pablo G. | 342 |
| May 16, 2025 | Skidmore Constance Ellen | 342 |
| May 16, 2025 | Kapoor Gaurav | 342 |
| May 16, 2025 | Wallis-Lage Cindy L. | 342 |
| May 16, 2025 | Hardy Rhoman J | 342 |
| May 13, 2025 | GEORGE WILLIAM III | 13K |
| May 6, 2025 | MYERS FRANKLIN | 1,347 |
| Apr 1, 2025 | GEORGE WILLIAM III | 1,430 |
| Apr 1, 2025 | Shaeff Julie | 413 |
| Apr 1, 2025 | Trent T McKenna | 962 |
| Apr 1, 2025 | Lane Brian E. | 4,333 |
| Apr 1, 2025 | Howell Laura Finley | 574 |
| Apr 1, 2025 | Reed Terrence | 216 |
| Mar 19, 2025 | GEORGE WILLIAM III | 5,595 |
| Mar 19, 2025 | Shaeff Julie | 1,690 |
| Mar 19, 2025 | Trent T McKenna | 4,239 |
| Mar 19, 2025 | Lane Brian E. | 19K |
| Mar 19, 2025 | Howell Laura Finley | 2,312 |
| Mar 19, 2025 | Reed Terrence | 1,346 |
| Dec 2, 2024 | GEORGE WILLIAM III | 3,279 |
| Nov 25, 2024 | GEORGE WILLIAM III | 1,140 |
| Nov 22, 2024 | Trent T McKenna | 4,000 |
| Aug 1, 2024 | Kapoor Gaurav | 385 |
| May 17, 2024 | Tang Vance W | 1,107 |
| May 17, 2024 | ANDERSON DARCY | 498 |
| May 17, 2024 | BULLS HERMAN E | 498 |
| May 17, 2024 | MYERS FRANKLIN | 498 |
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
The chart, in numbers
| Flow | Shares |
|---|---|
| From holdings | 118K |
| Granted | 10K |
| Vested / exercised | 9,000 |
| Withheld for tax | 11K |
| Discretionary sales | 122K |
| Gifts | 3,855 |
Skin in the game
Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades.
The chart, in numbers
| Insider | Start of the window | Latest reported | Indexed, start = 100 |
|---|---|---|---|
| Lane Brian E. | 264K | 145K | 54.9 |
| MYERS FRANKLIN | 200K | 59K | 29.3 |
| GEORGE WILLIAM III | 44K | 30K | 69.4 |
| BULLS HERMAN E | 69K | 30K | 43.5 |
| Trent T McKenna | 30K | 22K | 74.4 |
Who holds what
the 14 largest holdings of 17| Insider | Role | Shares held | Buys 12 m | Sales 12 m | 12 m | Last trade |
|---|---|---|---|---|---|---|
| Lane Brian E. CHIEF EXECUTIVE OFF. Last trade Aug 26, 2026 | CEO | 145K | – | $68M | net selling over the year: 0 months buying, 4 months selling | Aug 26, 2026 |
| MYERS FRANKLIN Last trade Aug 11, 2026 | Director | 67K | – | $52M | net selling over the year: 0 months buying, 5 months selling | Aug 11, 2026 |
| GEORGE WILLIAM III CHIEF FINANCIAL OFFICER Last trade Aug 17, 2026 | CFO | 30K | – | $32M | net selling over the year: 0 months buying, 4 months selling | Aug 17, 2026 |
| BULLS HERMAN E Last trade Oct 29, 2025 | Director | 30K | – | $2.0M | net selling over the year: 0 months buying, 1 month selling | Oct 29, 2025 |
| Trent T McKenna PRESIDENT/CHIEF OPERATING OFF. Last trade Jul 31, 2025 | COO | 23K | – | – | Jul 31, 2025 | |
| ANDERSON DARCY Last trade Mar 3, 2026 | Director | 18K | – | $10.0M | net selling over the year: 0 months buying, 2 months selling | Mar 3, 2026 |
| Tang Vance W Last trade May 1, 2025 | Director | 18K | – | – | May 1, 2025 | |
| Skidmore Constance Ellen Last trade Feb 24, 2026 | Director | 13K | – | $1.4M | net selling over the year: 0 months buying, 1 month selling | Feb 24, 2026 |
| Shaeff Julie CHIEF ACCOUNTING OFFICER Last trade May 11, 2026 | Officer | 13K | – | $5.4M | net selling over the year: 0 months buying, 2 months selling | May 11, 2026 |
| SANDBROOK WILLIAM J Last trade Apr 29, 2026 | Director | 7,941 | – | $6.2M | net selling over the year: 0 months buying, 2 months selling | Apr 29, 2026 |
| Howell Laura Finley SVP & GENERAL COUNSEL Last trade Dec 4, 2025 | Officer | 7,938 | – | $996K | net selling over the year: 0 months buying, 1 month selling | Dec 4, 2025 |
| Wallis-Lage Cindy L. Last trade Nov 28, 2022 | Director | 5,818 | – | – | Nov 28, 2022 | |
| Reed Terrence SVP & CHRO Last trade Mar 3, 2026 | Officer | 3,143 | – | $2.5M | net selling over the year: 0 months buying, 2 months selling | Mar 3, 2026 |
| Mercado, Pablo G. Last trade Apr 30, 2026 | Director | 3,105 | – | $4.1M | net selling over the year: 0 months buying, 3 months selling | Apr 30, 2026 |
Open-market trade log
the 60 most recent of 451| Date | Insider | Type | Shares | Price | Value | Since trade | Filed |
|---|---|---|---|---|---|---|---|
| Aug 26, 2026 | Lane Brian E. (CEO) 16K shares $1,608.21 +5.3% since trade filed Aug 27, 2026 | Discretionary sale | 16K | $1,608.21 | $26M | +5.3% | Aug 27, 2026 |
| Aug 17, 2026 | GEORGE WILLIAM III (CFO) 2,554 shares $1,859.65 −8.9% since trade filed Aug 18, 2026 | Discretionary sale | 2,554 | $1,859.65 | $4.7M | −8.9% | Aug 18, 2026 |
| Aug 11, 2026 | MYERS FRANKLIN (Director) 4,000 shares $1,693.92 +0.0% since trade filed Aug 12, 2026 | Discretionary sale | 4,000 | $1,693.92 | $6.8M | +0.0% | Aug 12, 2026 |
| Aug 10, 2026 | MYERS FRANKLIN (Director) 3,500 shares $1,690.47 +0.2% since trade filed Aug 12, 2026 | Discretionary sale | 3,500 | $1,690.47 | $5.9M | +0.2% | Aug 12, 2026 |
| Jun 24, 2026 | MYERS FRANKLIN (Director) 6,700 shares $1,954.47 −13.3% since trade filed Jun 26, 2026 | Discretionary sale | 6,700 | $1,954.47 | $13M | −13.3% | Jun 26, 2026 |
| May 27, 2026 | Hardy Rhoman J (Director) 342 shares $1,900.08 −10.9% since trade filed May 28, 2026 | Discretionary sale | 342 | $1,900.08 | $650K | −10.9% | May 28, 2026 |
| May 11, 2026 | GEORGE WILLIAM III (CFO) 1,000 shares $2,020.97 −16.2% since trade filed May 12, 2026 | Discretionary sale | 1,000 | $2,020.97 | $2.0M | −16.2% | May 12, 2026 |
| May 11, 2026 | Shaeff Julie (Officer) 1,123 shares $2,000.37 −15.3% since trade filed May 11, 2026 | Discretionary sale | 1,123 | $2,000.37 | $2.2M | −15.3% | May 11, 2026 |
| May 8, 2026 | GEORGE WILLIAM III (CFO) 4,000 shares $1,948.17 −13.1% since trade filed May 12, 2026 | Discretionary sale | 4,000 | $1,948.17 | $7.8M | −13.1% | May 12, 2026 |
| May 7, 2026 | MYERS FRANKLIN (Director) 4,500 shares $1,902.57 −11.0% since trade filed May 8, 2026 | Discretionary sale | 4,500 | $1,902.57 | $8.6M | −11.0% | May 8, 2026 |
| May 5, 2026 | Lane Brian E. (CEO) 11K shares $1,969.84 −14.0% since trade filed May 6, 2026 | Discretionary sale | 11K | $1,969.84 | $22M | −14.0% | May 6, 2026 |
| Apr 30, 2026 | Mercado, Pablo G. (Director) 500 shares $1,779.78 −4.8% since trade filed May 1, 2026 | Discretionary sale | 500 | $1,779.78 | $890K | −4.8% | May 1, 2026 |
| Apr 29, 2026 | SANDBROOK WILLIAM J (Director) 1,500 shares $1,732.67 −2.2% since trade filed Apr 30, 2026 | Discretionary sale | 1,500 | $1,732.67 | $2.6M | −2.2% | Apr 30, 2026 |
| Mar 3, 2026 | ANDERSON DARCY (Director) 4,500 shares $1,369.74 +23.7% since trade filed Mar 5, 2026 | Discretionary sale | 4,500 | $1,369.74 | $6.2M | +23.7% | Mar 5, 2026 |
| Mar 3, 2026 | Shaeff Julie (Officer) 2,287 shares $1,382.15 +22.6% since trade filed Mar 4, 2026 | Discretionary sale | 2,287 | $1,382.15 | $3.2M | +22.6% | Mar 4, 2026 |
| Mar 3, 2026 | Reed Terrence (Officer) 1,116 shares $1,397.33 +21.2% since trade filed Mar 5, 2026 | Discretionary sale | 1,116 | $1,397.33 | $1.6M | +21.2% | Mar 5, 2026 |
| Feb 25, 2026 | MYERS FRANKLIN (Director) 8,636 shares $1,472.56 +15.0% since trade filed Feb 27, 2026 | Discretionary sale | 8,636 | $1,472.56 | $13M | +15.0% | Feb 27, 2026 |
| Feb 25, 2026 | Lane Brian E. (CEO) 9,365 shares $1,453.12 +16.6% since trade filed Feb 26, 2026 | Discretionary sale | 9,365 | $1,453.12 | $14M | +16.6% | Feb 26, 2026 |
| Feb 24, 2026 | SANDBROOK WILLIAM J (Director) 2,500 shares $1,443.32 +17.4% since trade filed Feb 26, 2026 | Discretionary sale | 2,500 | $1,443.32 | $3.6M | +17.4% | Feb 26, 2026 |
| Feb 24, 2026 | Skidmore Constance Ellen (Director) 1,000 shares $1,425.00 +18.9% since trade filed Feb 24, 2026 | Discretionary sale | 1,000 | $1,425.00 | $1.4M | +18.9% | Feb 24, 2026 |
| Feb 24, 2026 | Reed Terrence (Officer) 671 shares $1,457.17 +16.3% since trade filed Mar 5, 2026 late | Discretionary sale | 671 | $1,457.17 | $978K | +16.3% | Mar 5, 2026 late |
| Feb 23, 2026 | GEORGE WILLIAM III (CFO) 9,000 shares $1,434.97 +18.1% since trade filed Feb 24, 2026 | Discretionary sale | 9,000 | $1,434.97 | $13M | +18.1% | Feb 24, 2026 |
| Feb 23, 2026 | Mercado, Pablo G. (Director) 500 shares $1,405.00 +20.6% since trade filed Feb 24, 2026 | Discretionary sale | 500 | $1,405.00 | $703K | +20.6% | Feb 24, 2026 |
| Dec 4, 2025 | Howell Laura Finley (Officer) 1,000 shares $996.16 +70.0% since trade filed Dec 5, 2025 | Discretionary sale | 1,000 | $996.16 | $996K | +70.0% | Dec 5, 2025 |
| Dec 1, 2025 | GEORGE WILLIAM III (CFO) 4,370 shares $958.88 +76.7% since trade filed Dec 3, 2025 | Discretionary sale | 4,370 | $958.88 | $4.2M | +76.7% | Dec 3, 2025 |
| Nov 24, 2025 | Lane Brian E. (CEO) 7,158 shares $947.98 +78.7% since trade filed Nov 25, 2025 | Discretionary sale | 7,158 | $947.98 | $6.8M | +78.7% | Nov 25, 2025 |
| Oct 31, 2025 | ANDERSON DARCY (Director) 4,000 shares $958.72 +76.7% since trade filed Nov 3, 2025 | Discretionary sale | 4,000 | $958.72 | $3.8M | +76.7% | Nov 3, 2025 |
| Oct 29, 2025 | BULLS HERMAN E (Director) 2,000 shares $1,013.62 +67.1% since trade filed Oct 31, 2025 | Discretionary sale | 2,000 | $1,013.62 | $2.0M | +67.1% | Oct 31, 2025 |
| Oct 29, 2025 | MYERS FRANKLIN (Director) 5,000 shares $1,006.68 +68.3% since trade filed Oct 31, 2025 | Discretionary sale | 5,000 | $1,006.68 | $5.0M | +68.3% | Oct 31, 2025 |
| Oct 29, 2025 | Mercado, Pablo G. (Director) 2,500 shares $1,005.41 +68.5% since trade filed Oct 30, 2025 | Discretionary sale | 2,500 | $1,005.41 | $2.5M | +68.5% | Oct 30, 2025 |
| Sep 10, 2025 | SANDBROOK WILLIAM J (Director) 800 shares $733.56 +130.9% since trade filed Sep 10, 2025 | Discretionary sale | 800 | $733.56 | $587K | +130.9% | Sep 10, 2025 |
| Sep 9, 2025 | SANDBROOK WILLIAM J (Director) 100 shares $706.00 +139.9% since trade filed Sep 10, 2025 | Discretionary sale | 100 | $706.00 | $71K | +139.9% | Sep 10, 2025 |
| Sep 9, 2025 | SANDBROOK WILLIAM J (Director) 600 shares $708.97 +138.9% since trade filed Sep 10, 2025 | Discretionary sale | 600 | $708.97 | $425K | +138.9% | Sep 10, 2025 |
| Aug 27, 2025 | BULLS HERMAN E (Director) 3,000 shares $710.00 +138.6% since trade filed Aug 28, 2025 | Discretionary sale | 3,000 | $710.00 | $2.1M | +138.6% | Aug 28, 2025 |
| Aug 25, 2025 | SANDBROOK WILLIAM J (Director) 700 shares $689.58 +145.7% since trade filed Aug 27, 2025 | Discretionary sale | 700 | $689.58 | $483K | +145.7% | Aug 27, 2025 |
| Aug 22, 2025 | Mercado, Pablo G. (Director) 1,078 shares $695.88 +143.4% since trade filed Aug 25, 2025 | Discretionary sale | 1,078 | $695.88 | $750K | +143.4% | Aug 25, 2025 |
| Aug 12, 2025 | Shaeff Julie (Officer) 1,369 shares $704.50 +140.4% since trade filed Aug 13, 2025 | Discretionary sale | 1,369 | $704.50 | $964K | +140.4% | Aug 13, 2025 |
| Aug 8, 2025 | GEORGE WILLIAM III (CFO) 8,436 shares $692.60 +144.6% since trade filed Aug 12, 2025 | Discretionary sale | 8,436 | $692.60 | $5.8M | +144.6% | Aug 12, 2025 |
| Aug 7, 2025 | Lane Brian E. (CEO) 10K shares $691.74 +144.9% since trade filed Aug 8, 2025 | Discretionary sale | 10K | $691.74 | $6.9M | +144.9% | Aug 8, 2025 |
| Aug 6, 2025 | MYERS FRANKLIN (Director) 4,500 shares $683.57 +147.8% since trade filed Aug 7, 2025 | Discretionary sale | 4,500 | $683.57 | $3.1M | +147.8% | Aug 7, 2025 |
| Jul 31, 2025 | Trent T McKenna (COO) 4,400 shares $716.63 +136.4% since trade filed Aug 1, 2025 | Discretionary sale | 4,400 | $716.63 | $3.2M | +136.4% | Aug 1, 2025 |
| Jun 9, 2025 | BULLS HERMAN E (Director) 2,500 shares $500.01 +238.8% since trade filed Jun 11, 2025 | Discretionary sale | 2,500 | $500.01 | $1.3M | +238.8% | Jun 11, 2025 |
| Jun 6, 2025 | ANDERSON DARCY (Director) 8,000 shares $506.82 +234.2% since trade filed Jun 9, 2025 | Discretionary sale | 8,000 | $506.82 | $4.1M | +234.2% | Jun 9, 2025 |
| May 13, 2025 | GEORGE WILLIAM III (CFO) 13K shares $470.11 +260.3% since trade filed May 14, 2025 | Discretionary sale | 13K | $470.11 | $5.9M | +260.3% | May 14, 2025 |
| May 12, 2025 | Skidmore Constance Ellen (Director) 1,000 shares $452.98 +274.0% since trade filed May 13, 2025 | Discretionary sale | 1,000 | $452.98 | $453K | +274.0% | May 13, 2025 |
| May 7, 2025 | ANDERSON DARCY (Director) 3,000 shares $431.66 +292.4% since trade filed May 9, 2025 | Discretionary sale | 3,000 | $431.66 | $1.3M | +292.4% | May 9, 2025 |
| May 7, 2025 | Lane Brian E. (CEO) 15K shares $431.66 +292.4% since trade filed May 9, 2025 | Discretionary sale | 15K | $431.66 | $6.5M | +292.4% | May 9, 2025 |
| May 5, 2025 | Mercado, Pablo G. (Director) 1,800 shares $436.10 +288.4% since trade filed May 6, 2025 | Discretionary sale | 1,800 | $436.10 | $785K | +288.4% | May 6, 2025 |
| May 1, 2025 | Tang Vance W (Director) 500 shares $422.00 +301.4% since trade filed May 2, 2025 | Discretionary sale | 500 | $422.00 | $211K | +301.4% | May 2, 2025 |
| Nov 22, 2024 | Trent T McKenna (COO) 4,000 shares $484.81 +249.4% since trade filed Nov 25, 2024 | Discretionary sale | 4,000 | $484.81 | $1.9M | +249.4% | Nov 25, 2024 |
| Nov 13, 2024 | Lane Brian E. (CEO) 15K shares $448.88 +277.4% since trade filed Nov 15, 2024 | Discretionary sale | 15K | $448.88 | $6.7M | +277.4% | Nov 15, 2024 |
| Nov 8, 2024 | GEORGE WILLIAM III (CFO) 5,436 shares $459.73 +268.5% since trade filed Nov 12, 2024 | Discretionary sale | 5,436 | $459.73 | $2.5M | +268.5% | Nov 12, 2024 |
| Nov 5, 2024 | Mercado, Pablo G. (Director) 2,500 shares $409.46 +313.7% since trade filed Nov 7, 2024 | Discretionary sale | 2,500 | $409.46 | $1.0M | +313.7% | Nov 7, 2024 |
| Oct 30, 2024 | MYERS FRANKLIN (Director) 12K shares $390.18 +334.1% since trade filed Oct 31, 2024 | Discretionary sale | 12K | $390.18 | $4.7M | +334.1% | Oct 31, 2024 |
| Oct 28, 2024 | Tang Vance W (Director) 2,700 shares $390.00 +334.3% since trade filed Oct 29, 2024 | Discretionary sale | 2,700 | $390.00 | $1.1M | +334.3% | Oct 29, 2024 |
| Aug 29, 2024 | Shaeff Julie (Officer) 2,316 shares $351.85 +381.4% since trade filed Aug 30, 2024 | Discretionary sale | 2,316 | $351.85 | $815K | +381.4% | Aug 30, 2024 |
| Aug 27, 2024 | ANDERSON DARCY (Director) 3,546 shares $336.19 +403.9% since trade filed Aug 28, 2024 | Discretionary sale | 3,546 | $336.19 | $1.2M | +403.9% | Aug 28, 2024 |
| Aug 20, 2024 | GEORGE WILLIAM III (CFO) 5,845 shares $332.16 +410.0% since trade filed Aug 21, 2024 | Discretionary sale | 5,845 | $332.16 | $1.9M | +410.0% | Aug 21, 2024 |
| Aug 14, 2024 | Lane Brian E. (CEO) 15K shares $329.55 +414.0% since trade filed Aug 16, 2024 | Discretionary sale | 15K | $329.55 | $4.9M | +414.0% | Aug 16, 2024 |
| Jun 5, 2024 | Tang Vance W (Director) 3,473 shares $310.00 +446.4% since trade filed Jun 7, 2024 | Discretionary sale | 3,473 | $310.00 | $1.1M | +446.4% | Jun 7, 2024 |
“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles.
Filing hygiene
148 Forms 4, 3 years
4 filed late
0 amendments
1.7 avg. days to file
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.