X0306 4 2021-03-05 0 0001819253 Haymaker Acquisition Corp. III HYACU 0001259062 HEYER ANDREW R 501 MADISON AVENUE, FLOOR 12 NEW YORK NY 10022 1 1 0 0 President Class B Common Stock 2021-03-05 4 J 0 687500 0.00 D Class A Common Stock 687500 7937500 I See footnote Andrew R. Heyer, the President and a director of the issuer, is a managing member of Haymaker Sponsor III LLC (the "Sponsor") and has voting and investment discretion with respect to the securities held by the Sponsor. As such, Mr. Heyer may be deemed to possess beneficial ownership of the securities held directly by the Sponsor. Mr. Heyer disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly As described in the issuer's registration statement on Form S-1 ((File No. 333-253010) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the issuer's initial business combination, on a one-for-one basis, subject to adjustment for stock splits, stock dividends, reorganizations, recapitalizations and the like, and certain anti-dilution rights and has no expiration date. As contemplated in connection with the initial public offering of the issuer, 687,500 shares of Class B common stock of the issuer were returned by the Sponsor to the issuer for no consideration and cancelled because the underwriters' over-allotment option was not exercised in full. /s/ Andrew R. Heyer 2021-03-09