3.	Business Combination

(a)	AMCI Acquisition Corp.

As detailed in Note 1 on February 4, 2021, the Company and AMCI consummated the Business Combination pursuant to the terms of the merger agreement, with Advent Legacy surviving the merger as a wholly-owned subsidiary of AMCI. Immediately prior to the closing of the Business Combination, all shares of outstanding preferred stock Series A and preferred stock Series Seed of Legacy Advent were automatically converted into shares of the Legacy Advent's common stock. Upon the consummation of the Business Combination, each share of Legacy Advent common stock issued and outstanding was canceled and converted into the right to receive the amount of shares as determined based on the merger consideration of $250 million minus the estimated consolidated indebtedness of Legacy Advent and its subsidiaries as of the consummation of the Business Combination, net of their estimated consolidated cash and cash equivalents (“Closing Net Indebtedness”) divided by $10.00. The Closing Net Indebtedness was based solely on estimates determined shortly prior to the closing and was not subject to any post-closing true-up or adjustment.

Upon the closing of the Business Combination, AMCI's certificate of incorporation was amended and restated to, among other things, authorize the issuance of 111,000,000 shares, of which 110,000,000 shares are shares of common stock, par value $0.0001 per share and 1,000,000 shares are shares of undesignated preferred stock, par value $0.0001 per share.

In connection with the execution of the Business Combination Agreement, AMCI entered into separate subscription agreements (each, a "Subscription Agreement") with a number of investors (each a "Subscriber"), pursuant to which the Subscribers agreed to purchase, and AMCI agreed to sell to the Subscribers, an aggregate of 6,500,000 shares of common stock (the "PIPE Shares"), for a purchase price of $10.00 per share and an aggregate purchase price of $65.0 million, in a private placement pursuant to the subscription agreements (the "PIPE"). The PIPE investment closed simultaneously with the consummation of the Business Combination.

The Business Combination is accounted for as a reverse recapitalization in accordance with GAAP. Under this method of accounting, AMCI was treated as the "acquired" company for financial reporting purposes. See Note 1 "Basis of Presentation" in the accompanying unaudited condensed consolidated financial statements for further details. Accordingly, for accounting purposes, the Business Combination was treated as the equivalent of Legacy Advent issuing stock for the net assets of AMCI, accompanied by a recapitalization. The net assets of AMCI are stated at historical cost, with no goodwill or other intangible assets recorded.

The following table reconciles the elements of the Business Combination to the consolidated statement of cash flows and the consolidated statement of changes in equity for the three month ended March 31, 2021:

	Recapitalization
Cash- AMCI’s trust and cash (net of redemptions)	$	93,310,599
Cash – PIPE plus interest		65,000,118
Less transaction costs and advisory fees paid		(17,617,601	)
Less non-cash warrant liability assumed		(33,116,321	)
Net Business Combination and PIPE financing	$	107,576,795

The number of shares of common stock issued immediately following the consummation of the Business Combination:

	Recapitalization
Class A Common A stock of AMCI, outstanding prior to Business Combination		9,061,136
Less Redemption of AMCI shares		(1,606	)
Class B Common Stock of AMCI, outstanding prior to Business Combination		5,513,019
Shares issued in PIPE		6,500,000
Business Combination and PIPE financing shares		21,072,549
Legacy Advent Shares		25,033,398
Total shares of Common Stock immediately after Business Combination		46,105,947

(b)	UltraCell, LLC

On February 18, 2021 (the “acquisition date”), pursuant to the terms and conditions of the Purchase Agreement, the Company acquired 100% of the issued and outstanding membership units of UltraCell from Bren-Tronics, Inc. The results of UltraCell’s operations have been included in the unaudited condensed consolidated financial statements since the acquisition date.

UltraCell is an entity specialized in lightweight fuel cells for the portable power market with mature products and cutting-edge technology.

The acquisition consideration transferred totaled $6.0 million, of which $4.0 million was cash and $2 million was the fair value of the contingent consideration. The contingent consideration arrangement required the Company to pay $2 million of additional cash to UltraCell’s former holders of membership interests, if UltraCell entered into certain customer arrangements for sales of products prior to June 30, 2021. On April 16, 2021 Advent paid the additional consideration based on UltraCell achieving completion of the terms of the contingent consideration.

The estimated fair values of the assets acquired and liabilities assumed at the acquisition date was $5.5 million, resulting in the recognition of provisional goodwill of $0.5 million. The Company is in the process of obtaining third-party valuations of certain intangible assets; thus, the provisional measurements of intangible assets and goodwill are subject to change.

The provisional value of $5 million of intangibles relates to trademarks, patents, customer relationships, customer contracts and know-how. Those intangibles mainly relate to definite-live intangible assets with estimated useful lives that vary between 3-10 years, with the exception of contract backlogs which are amortized over the remaining period of the contracts assumed based on income approach. During the period from acquisition and up to March 31, 2021, the Company has recognized in the condensed consolidated statement of operations amortization for those intangibles of $0.2 million.