X0306 4 2023-02-01 false 0001657573 Xometry, Inc. XMTR 0001869814 Altschuler Randolph C/O XOMETRY, INC. 6116 EXECUTIVE BLVD, SUITE 800 NORTH BETHESDA MD 20852 true true false false Chief Executive Officer Class A Common Stock 2023-02-01 4 S false 7235.00 34.9232 D 634035.00 I Held by spouse Class A Common Stock 2023-02-01 4 S false 2765.00 35.7098 D 631270.00 I Held by spouse Class A Common Stock 2023-02-01 4 S false 1556.00 34.9999 D 475692.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2023-02-01 4 S false 444.00 35.7771 D 475248.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2023-02-01 4 S false 1603.00 34.968 D 85979.00 I Held by the 2021 Tigers Trust Class A Common Stock 2023-02-01 4 S false 397.00 35.8483 D 85582.00 I Held by the 2021 Tigers Trust Class A Common Stock 2023-02-01 4 S false 1649.00 35.0321 D 324884.00 I Held by The Matthew Sladkin Altschuler 2012 Trust Class A Common Stock 2023-02-01 4 S false 351.00 35.8128 D 324533.00 I Held by The Matthew Sladkin Altschuler 2012 Trust Class A Common Stock 2023-02-01 4 S false 1640.00 34.9817 D 324893.00 I Held by The Noah Sladkin Altschuler 2012 Trust Class A Common Stock 2023-02-01 4 S false 360.00 35.868 D 324533.00 I Held by The Noah Sladkin Altschuler 2012 Trust Class A Common Stock 2023-02-01 4 S false 1484.00 34.9927 D 325049.00 I Held by The Sasha Sladkin Altschuler 2012 Trust Class A Common Stock 2023-02-01 4 S false 516.00 35.7719 D 324533.00 I Held by The Sasha Sladkin Altschuler 2012 Trust Represents shares sold in a transaction that was effected automatically pursuant to a Rule 10b-5 trading plan adopted by the reporting person's spouse at least 120 days prior to the trading date. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.46 to $35.39, 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 (2), (3), (5), (6), (8), (9), (11), (13), (14), (16) and (17) 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 $35.50 to $36.17, inclusive. Represents shares sold in a transaction that was effected automatically pursuant to a Rule 10b-5 trading plan adopted by The Altschuler Family Trust (2020) at least 120 days prior to the trading date. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.58 to $35.50, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.60 to $36.09, inclusive. Represents shares sold in a transaction that was effected automatically pursuant to a Rule 10b-5 trading plan adopted by the 2021 Tigers Trust at least 120 days prior to the trading date. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.46 to $35.37, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.69 to $36.17, inclusive. Represents shares sold in a transaction that was effected automatically pursuant to a Rule 10b-5 trading plan adopted by The Matthew Sladkin Altschuler 2012 Trust at least 120 days prior to the trading date. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.69 to $36.09, inclusive. Represents shares sold in a transaction that was effected automatically pursuant to a Rule 10b-5 trading plan adopted by The Noah Sladkin Altschuler 2012 Trust Trust at least 120 days prior to the trading date. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.58 to $35.37, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.78 to $36.11, inclusive. Represents shares sold in a transaction that was effected automatically pursuant to a Rule 10b-5 trading plan adopted by The Sasha Sladkin Altschuler 2012 Trust at least 120 days prior to the trading date. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.58 to $35.52, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.60 to $36.17, inclusive. /s/ Kristie Scott, Attorney-in-Fact 2023-02-01