Comfort Systems USA Inc (FIX) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Aug 27, 2026.
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- Filings shown
- 8
- Open-market buys
- 0
- Open-market sells
- 6
Counts cover the 8 most recent Form 4 filings Tradune holds for FIX (filed May 19 – Aug 27, 2026); the score below covers only the trailing 90 days (0 buys, 4 sells). No completed check of FIX's Form 4 list on SEC EDGAR is on record yet; the latest FIX filing Tradune holds was filed Aug 27, 2026. This is not guaranteed to be the complete record — see FIX's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 3 filings Tradune holds for FIX filed Aug 12 – Aug 27, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
4 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 0 sales· 0 sh
- checkbox disclosed
- On filings with the box not checked
- 4 sales· 26,078 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Franklin MyersDirector | 0 | 2 | — | 7,500 | −$12,692,338 |
| Brian E. LaneCHIEF EXECUTIVE OFF. | 0 | 1 | — | 16,024 | −$25,769,923 |
| William George IIICHIEF FINANCIAL OFFICER | 0 | 1 | — | 2,554 | −$4,749,549 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at FIX
No open-market insider purchases (Form 4 code P) were reported for FIX between May 19, 2026 and Aug 27, 2026. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 16,024 | $1,608.21 | 145,065 | −9.9% | Aug 26, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 2,554 | $1,859.65 | 30,250 | −7.8% | Aug 17, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 4,000 | $1,693.92 | 8,495 (indirect) | −32% | Aug 11, 2026 |
| Open-market sale 10b5-1 box not checked | 3,500 | $1,690.47 | 58,615 | −5.6% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 6,700 | $1,954.47 | 62,115 | −9.7% | Jun 24, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 342 | $1,900.08 | 1,890 | −15% | May 27, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 273 | — | 68,815 | −0.4% | May 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 105 | — | 69,088 | +0.2% | May 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 105 | — | 18,140 | +0.6% | May 18, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to FIX's (Aug 27, 2026).
Frequently asked about FIX insider activity
How many insiders bought FIX stock in these Form 4 filings?
No open-market purchases (Form 4 code P) of FIX shares were reported by Comfort Systems USA Inc insiders between May 19, 2026 and Aug 27, 2026. The 8 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for FIX?
The most recent Form 4 on this page was filed by Brian E. Lane (CHIEF EXECUTIVE OFF.) on Aug 27, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market FIX insider sale shown?
The largest open-market sale among the filings shown was 16,024 FIX shares at $1,608.21 (about $25,769,923) by Brian E. Lane (CHIEF EXECUTIVE OFF.) on Aug 26, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track FIX insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.