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Thomas Lenox Kempner, Jr.

Haymaker Acquisition Corp (NASDAQ:HYACU): Thomas Lenox Kempner, Jr.’s Davidson Kempner Partners filed an amended 13D.

You can check out Davidson Kempner Partners’ latest holdings and filings here.

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Thomas Lenox Kempner, Jr.
Thomas Lenox Kempner, Jr.
Davidson Kempner

You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Davidson Kempner Partners 0 364,400 0 364,400 364,400 1.21%
Davidson Kempner Institutional Partners 0 773,800 0 773,800 773,800 2.58%
Davidson Kempner International, Ltd 0 861,800 0 861,800 861,800 2.87%
Davidson Kempner Capital Management 0 2,000,000 0 2,000,000 2,000,000 6.67%
Thomas L. Kempner, Jr 0 2,000,000 0 2,000,000 2,000,000 6.67%
Robert J. Brivio, Jr 0 2,000,000 0 2,000,000 2,000,000 6.67%

Page 1 of 12 – SEC Filing

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. __)*

Haymaker
Acquisition Corp.

(Name of Issuer)

Class A Common
Stock, par value $0.0001 per share

(Title of Class of Securities)

420870206**

(CUSIP Number)

October 25,
2017

(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
¨ Rule 13d-1(b)
ý Rule 13d-1(c)
¨ Rule 13d-1(d)
(Page 1 of 12 Pages)

______________________________

*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 Class A Common Stock has no CUSIP
number. The CUSIP number for the units which include the Class A Common Stock is 420870206.

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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