Xometry Results Presentation Deck

Non-GAAP Operating Expenses (% of Revenue) Including Thomas from the Acquisition Date December 9, 2021 Sales and Marketing (1) Thomas 35%(3) 17.0% 16.9% 16.7% 18.5% 21.4% 1Q21 2021 3Q21 4Q21 1Q22 Operations and Support (1) Thomas 16%(3) 9.6% 9.6% 8.9% 10.1% 13.1% 1Q21 2Q21 3Q21 4Q21 1Q22 Product Development (1) Thomas 7%(3) 6.8% 6.0% 5.7% (1) Excludes stock-based compensation, depreciation, and amortization. (2) Excludes charitable contribution, revaluation of contingent consideration, amortization of in-place lease asset, and transaction costs. (3) GAAP Operating expenses as a percent of revenue for Thomas for the trailing 12 months ended September 30, 2021 Xometry 5.9% 6.7% 1021 2021 3Q21 4Q21 1Q22 G&A (1) (2) Thomas 30%(3) 9.2% 9.0% 12.0% 14.4% 13.5% 1Q21 2Q21 3Q21 4Q21 1Q22 © 2022 Xometry, Inc and/or its affiliates. All rights reserved. Confidential 21

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