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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Speirs David   2. Issuer Name and Ticker or Trading Symbol Ultra Clean Holdings, Inc. [UCTT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, North America (Last) (First) (Middle) ULTRA CLEAN HOLDINGS, INC., 26462 CORPORATE AVE 3. Date of Earliest Transaction (Month/Day/Year) 03/01/2017 (Street) HAYWARD, CA 94545 4. If Amendment, Date 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 (City) (State) (Zip) 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 03/01/2017   P(1)   4,204 A $ 14.29 147,920 D   Common Stock 03/15/2017   S   9,958 D $ 14.6 137,962 D   Common Stock 03/17/2017   S   18,052 D $ 15.371 (2) 119,910 D   Common Stock 04/17/2017   S(3)   16,119 D $ 15.1284 (4) 103,791 D   Common Stock               200 I by son

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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 Underlying Securities (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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Speirs David ULTRA CLEAN HOLDINGS, INC. 26462 CORPORATE AVE HAYWARD, CA 94545			SVP, North America

Signatures

/s/ Sheri Brumm, as attorney-in-fact for David Speirs		04/19/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This Form is being filed late to report transactions that were inadvertently omitted from prior reports. The reporting person's sale of UCTT common stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 4,204 shares, with the reporting person's purchase of 4,204 shares of UCTT common stock at a price of $14.29 per share on March 1, 2017. The reporting person has paid UCTT $4,666.44, representing the full amount of the profit (using a per share sale price of $15.40, which was the highest sale price for any individual sale transaction during the relevant time period) in connection with the short-swing transaction, and the reporting person has further agreed to pay UCTT any further profits that result from future sales.
(2)	This is the weighted average sale price. Shares were sold in multiple transactions at prices from $15.3338 to $15.40. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.
(3)	Shares sold pursuant to a previously established Rule 10b5-1 Plan.
(4)	This is the weighted average sale price. Shares were sold in multiple transactions at prices from $15.00 to $15.30. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4) to this Form 4.

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