UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G/A
Under the Securities Exchange Act of 1934
(Amendment No. 1)*
MASTEC Inc
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(Name of Issuer)
Common Stock, $0.01 par value
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(Title of Class of Securities)
576323109
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(CUSIP Number)
December 31, 2016
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(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities,
and for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall
not be deemed to be "filed" for the purpose of Section 18 of the
Securities Exchange Act of 1934 ("Act") or otherwise subject to
the liabilities of that section of the Act but shall be subject
to all other provisions of the Act (however, see the Notes).
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CUSIP No. 576323109 SCHEDULE 13G/A
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(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
Peconic Partners LLC
13-3942422
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(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions):
(a) [ ]
(b) [ ]
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(3) SEC USE ONLY
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(4) CITIZENSHIP OR PLACE OF ORGANIZATION
New York
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(5) SOLE VOTING POWER
NUMBER OF None
SHARES -------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY 4,788,946
EACH REPORTING -------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
None
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(8) SHARED DISPOSITIVE POWER
4,788,946
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(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,788,946
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(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(See Instructions) [ ]
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(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
5.81%
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(12) TYPE OF REPORTING PERSON (See Instructions)
IA
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CUSIP No. 576323109 SCHEDULE 13G/A
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(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
William F. Harnisch
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(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions):
(a) [ ]
(b) [ ]
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(3) SEC USE ONLY
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(4) CITIZENSHIP OR PLACE OF ORGANIZATION
United States
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(5) SOLE VOTING POWER
NUMBER OF 494,000
SHARES -------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY 4,788,946
EACH REPORTING -------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
494,000
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(8) SHARED DISPOSITIVE POWER
4,788,946
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(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,282,946
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(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(See Instructions) [ ]
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(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
6.4%
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(12) TYPE OF REPORTING PERSON (See Instructions)
IN
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CUSIP NO. 576323109 SCHEDULE 13G/A
Item 1(a). Name of Issuer:
MASTEC INC.
Item 1(b). Address of Issuer's Principal Executive Offices:
800 South Douglas Road
12th Floor
Coral Gables, Florida 33134
Item 2(a). Name of Persons Filing:
(i) Peconic Partners LLC
(ii) William F. Harnisch
Item 2(b). Address of Principal Business Office or, if None, Residence:
(i) P. O. Box 3002, 506 Montauk Highway, East Quogue, New York 11942
(ii) P. O. Box 3002, 506 Montauk Highway, East Quogue, New York 11942
Item 2(c). Citizenship:
(i) New York
(ii) United States
Item 2(d). Title of Class of Securities:
Common Stock, $0.01 par value
Item 2(e). CUSIP Number:
576323109
Item 3. If This Statement is Filed Pursuant to Sections 240.13d-1(b)
or 240.13d-2(b), Check Whether the Person Filing is a:
(a) Peconic Partners LLC is a registered investment adviser under Section
203 of the Investment Advisers Act of 1940, as amended.
(b) William F. Harnisch is President and Chief Executive Officer of Peconic
Partners LLC
Item 4. Ownership.
Provide the following information regarding the aggregate number
and percentage of the class of securities of the issuer identified
in Item 1.
(a) Amount Beneficially Owned: Amount beneficially owned and (b)
Percent of class:
See Items 5 through 11 of the cover pages attached hereto.
This Schedule 13G shall not be construed as an admission that the
Reporting Persons, either for purposes of Section 13(d) or 13(g)
of the Securities Exchange Act of 1934, as amended, or for other
purposes, are the beneficial owners of any securities covered
by this statement.
(c) See Items 5 through 8 of the cover pages attached hereto.
Item 5. Ownership of Five Percent or Less of a Class.
If this statement is being filed to report the fact that as of the date hereof
the reporting person has ceased to be the beneficial owner of more than five
percent of the class of securities, check the following [ ].
Item 6. Ownership of More than Five Percent on Behalf of Another Person.
Not applicable.
Item 7. Identification and Classification of the Subsidiary Which Acquired
the Security Being Reported on By the Parent Holding Company or
Controlling Person.
Not applicable.
Item 8. Identification and Classification of Members of the Group.
Not applicable.
Item 9. Notice of Dissolution of Group
Not applicable.
Item 10. Certification
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not
held for the purpose of or with the effect of changing or influencing
the control of the issuer of the securities and were not acquired and
are not held in connection with or as a participant in any transaction
having that purpose or effect.
CUSIP NO. 576323109 SCHEDULE 13G/A
SIGNATURES
After reasonable inquiry and to the best of our knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.
Dated: February 14, 2017
PECONIC PARTNERS LLC
By: William F. Harnisch
as President and Chief Executive Officer
By: /s/ William F. Harnisch
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William F. Harnisch
Title: President and Chief Executive Officer
William F. Harnisch
By: /s/ William F. Harnisch
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William F. Harnisch
Individually
CUSIP NO. 576323109 SCHEDULE 13G
Exhibit A
Agreement
The undersigned, Peconic Partners LLC and William F. Harnisch, agree that the
statement to which this exhibit is appended is filed on behalf of each of them.
Dated: February 14, 2017
PECONIC PARTNERS LLC
By: William F. Harnisch
as President and Chief Executive Officer
By: //s/ William F. Harnisch
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William F. Harnisch
Title: President and Chief Executive Officer
William F. Harnisch
By: /s/ William F. Harnisch
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William F. Harnisch
Individually