Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

CARLSON DOUGLAS J

2. Date of Event Requiring Statement (MM/DD/YYYY) 10/9/2017

3. Issuer Name and Ticker or Trading Symbol

MACOM Technology Solutions Holdings, Inc. [MTSI]

(Last) (First) (Middle)

C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS, 100 CHELMSFORD STREET

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

_____ Director _____ 10% Owner
___ X ___ Officer (give title below) _____ Other (specify below)
SVP & GM, RF & Microwave /

(Street)

LOWELL, MA 01851

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

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 Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	14672 ⁽¹⁾ ⁽²⁾	D

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Stock Option (Right to Buy)	⁽³⁾	8/14/2020	Common Stock	600	$2.00	D
Stock Option (Right to Buy)	⁽⁴⁾	11/13/2022	Common Stock	10000	$32.10	D
Stock Option (Right to Buy)	⁽⁵⁾	11/9/2023	Common Stock	20000	$40.25	D

Explanation of Responses:
(1)	Includes (i) 4,000 restricted stock units ("RSUs") granted on March 14, 2017, which vest as follows: 1,000 RSUs vest on February 15, 2018, 1,000 RSUs vest on February 15, 2019, 1,000 RSUs vest on February 15, 2020 and 1,000 RSUs vest on February 15, 2021, provided that the Reporting Person remains in continuous service with the Issuer through each vesting date; (ii) 2,383 RSUs granted on March 17, 2016, which vest as follows: 794 RSUs vest on February 15, 2018, 794 RSUs vest on February 15, 2019 and 795 RSUs vest on February 15, 2020, provided that the Reporting Person remains in continuous service with the Issuer through each vesting date; [continued below]
(2)	(iii) 1,806 RSUs granted on March 23, 2015, which vest as follows: 903 RSUs vest on February 15, 2018 and 903 RSUs vest on vest on February 15, 2019, provided that the Reporting Person remains in continuous service with the Issuer through each vesting date; and (iv) 875 RSUs granted on January 29, 2014, which vest on February 15, 2018, provided that the Reporting Person remains in continuous service with the Issuer through such vesting date. All RSUs were granted to the Reporting Person under the Issuer's 2012 Omnibus Incentive Plan and each RSU represents the contingent right to receive one share of Common Stock.
(3)	The Stock Option vested in full on August 1, 2014.
(4)	100% of the Stock Option shall become vested and exercisable in the event that the 30 trading day trailing average closing price per share of the Common Stock meets or exceeds $64.22 per share.
(5)	100% of the Stock Option shall become vested and exercisable in the event that the 30 trading day trailing average closing price per share of the Common Stock meets or exceeds $66.96 per share.

Remarks:
Exhibit List: Exhibit 24 - Power of Attorney

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
CARLSON DOUGLAS J C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS 100 CHELMSFORD STREET LOWELL, MA 01851			SVP & GM, RF & Microwave

Signatures
/s/ Clay Simpson, Attorney-in-Fact		10/19/2017
^** 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 5(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).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.