Transaction Details

Footnotes

The transaction reported in this Form 4 was effected automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person at least 90 days prior to the trading date. | These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.945 to $63.79, inclusive. The reporting person undertakes to provide to Xometry, Inc., any security holder of Xometry, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the ranges set forth in footnotes (3), (4), (5), (6) and (7) to this Form 4. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.005 to $65.00, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.36 to $66.24, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.37 to $67.285, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.465 to $67.89, inclusive. | Held by the 2021 Tigers Trust, over which the Reporting Person may be deemed to exercise voting control. | Held by the Matthew Sladkin Altschuler 2012 Trust, over which the Reporting Person may be deemed to exercise voting control. | Held by the Sasha Sladkin Altschuler 2012 Trust, over which the Reporting Person may be deemed to exercise voting control. | Held by the Noah Sladkin Altschuler 2012 Trust, over which the Reporting Person may be deemed to exercise voting control. | Held by the Altschuler Family Trust (2020), over which the Reporting Person may be deemed to exercise voting control.