X0508 4 2023-10-16 0 0001844149 Spectaire Holdings Inc. PCCT 0001843892 Perception Capital Partners II LLC C/O SPECTAIRE HOLDINGS INC. 3109 W 50TH ST., #207 MINNEAPOLIS MN 55410 0 0 1 0 0001437760 Honour Scott C/O SPECTAIRE HOLDINGS INC. 3109 W 50TH ST., #207 MINNEAPOLIS MN 55410 1 0 1 0 0001890980 Haymaker Marcy C/O SPECTAIRE HOLDINGS INC. 3109 W 50TH ST., #207 MINNEAPOLIS MN 55410 1 0 1 0 0 Common Stock 2023-10-16 4 C 0 5660000 A 5660000 D Class B Ordinary Shares 2023-10-16 4 C 0 5660000 D Common Stock 5660000 0 D The Class B ordinary shares, par value $0.0001 per share of the Issuer (f/k/a Perception Capital Corp. II), converted automatically, on a one-for-one basis, into shares of common stock, par value $0.0001 per share, of Spectaire Holdings Inc. as a result of the Issuer's domestication as a corporation incorporated in the State of Delaware in connection with the Issuer's proposed initial business combination pursuant to the Agreement and Plan of Merger, dated as of January 16, 2023, by and between the Issuer, Spectaire Inc. and Perception Spectaire Merger Sub Corp. The reporting person is manage by Perception Capital Partners LLC, which is controlled by Northern Pacific Group, L.P. Scott Honour and Marcy Haymaker may be deemed to beneficially own shares held by the reporting person by virtue of their indirect shared control over the reporting person. /s/ See Signatures Included in Exhibit 99.1 2023-10-18