Edward Siegel - Oct 27, 2021 Form 3 Insider Report for Seaport Calibre Materials Acquisition Corp. (SCMA)

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	SCMA	Class B Common Stock							Oct 27, 2021	Class A Common Stock	57.7K		Direct	F1, F2
holding	SCMA	Class B Common Stock							Oct 27, 2021	Class A Common Stock	1.61M		See footnote	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Id	Content
F1	Shares of Class B Common Stock will automatically convert into shares of the Issuer's Class A Common Stock at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment, as described under the heading "Description of Securities" in the Issuer's registration statement on form S-1 (File No. 333-258024) (the "Registration Statement") and have no expiration date.
F2	Calibre Sponsor Sub, LLC ("Calibre Sub") is the record holder of the shares of Class B common stock reported herein. Calibre Group, LLC ("Calibre") is the Managing Member of Calibre Sub and has voting and investment discretion with respect to the common stock held of record by Calibre Sub. Mr. Siegel is co-Manager of Calibre with Jim Tumulty. Each of Calibre and Messrs. Tumulty and Siegel disclaim beneficial ownership of the reported securities other than to the extent of any pecuniary interest they may have therein, directly or indirectly.
F3	The shares of Class B common stock beneficially owned by the reporting person includes up to 7,531 shares held directly by Mr. Siegel and 210,542 shares held by Calibre Sub subject to forfeiture to the extent the underwriters of the initial public offering of the Issuer's securities do not exercise in full their over-allotment option as described in the Registration Statement.