T McKenna Trent Form 4 COMFORT SYSTEMS USA / T McKenna Trent ownership change

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Trent T McKenna

(Last) (First) (Middle)

C/O COMFORT SYSTEMS USA, INC.

675 BERING DRIVE, SUITE 400

(Street)

HOUSTON TX 77057

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
COMFORT SYSTEMS USA INC [ FIX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
SrVP, General Counsel and Secy

3. Date of Earliest Transaction (Month/Day/Year)
03/23/2016

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/23/2016		A		3,359(1)	A	$0	53,265	D
Common Stock	03/23/2016		A		7,062(2)	A	$0	60,327	D
Common Stock	03/25/2016(3)		F		1,928(4)	D	$30.36(5)	58,399	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (Right to Buy)	$30.36	03/23/2016		A		9,939		04/01/2017(6)	03/23/2026(7)	Common Stock	9,939	$0	9,939	D

Explanation of Responses:

1. Each restricted stock unit granted on March 23, 2016 represents a right to receive one share of common stock and will vest in equal installments over a three-year vesting schedule.

2. Reflects dollar-denominated performance restricted stock units granted on March 20, 2013 that vested on March 23, 2016. These units vested as a result of the Company's 2013-2015 relative Total Shareholder Return and 2013-2015 Company average EPS - the applicable performance metrics.

3. Forfeited shares are related to dollar-denominated performance restricted stock units that vested March 23, 2016 and were priced based on the closing price of the Company's common stock on March 23, 2016. Forfeitures were processed on March 25, 2016.

4. Reflects forfeited shares related to the vesting of dollar-denominated performance restricted stock units granted on March 20, 2013.

5. Price is based on the closing price of the Company's common stock on March 23, 2016.

6. Stock options vest in equal installments over a three-year vesting schedule.

7. Stock options will expire at the earlier of ten years from the date of grant or three months following termination of employment.

	/s/ Trent T. McKenna	03/25/2016
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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