X0306 4 2022-06-08 false 0001657573 Xometry, Inc. XMTR 0001869814 Altschuler Randolph C/O XOMETRY, INC. 7529 STANDISH PLACE, SUITE 200 DERWOOD MD 20855 true true false false Chief Executive Officer Class A Common Stock 2022-06-08 4 S false 426.00 33.8516 D 720844.00 I Held by spouse Class A Common Stock 2022-06-08 4 S false 7103.00 35.0092 D 713741.00 I Held by spouse Class A Common Stock 2022-06-08 4 S false 2471.00 35.7727 D 711270.00 I Held by spouse Class A Common Stock 2022-06-08 4 S false 110.00 33.8355 D 493138.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2022-06-08 4 S false 1473.00 35.0142 D 491665.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2022-06-08 4 S false 417.00 35.8988 D 491248.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2022-06-08 4 S false 95.00 33.8316 D 103487.00 I Held by the 2021 Tigers Trust Class A Common Stock 2022-06-08 4 S false 1337.00 34.9939 D 102150.00 I Held by the 2021 Tigers Trust Class A Common Stock 2022-06-08 4 S false 568.00 35.7304 D 101582.00 I Held by the 2021 Tigers Trust Class A Common Stock 2022-06-08 4 S false 2859.00 34.1743 D 339674.00 I Held by The Matthew Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 1245.00 35.0016 D 338429.00 I Held by The Matthew Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 611.00 35.6681 D 337818.00 I Held by The Matthew Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 108.00 33.835 D 342425.00 I Held by The Noah Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 1181.00 34.8864 D 341244.00 I Held by The Noah Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 711.00 35.631 D 340533.00 I Held by The Noah Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 116.00 33.8367 D 342417.00 I Held by The Sasha Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 1082.00 34.9094 D 341335.00 I Held by The Sasha Sladkin Altschuler 2012 Trust Class A Common Stock 2022-06-08 4 S false 802.00 35.7296 D 340533.00 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 14 days prior to the trading date. 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 14 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 $35.48 to $36.02, 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 14 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 $34.335 to $35.30, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.335 to $36.02, 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 14 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 $34.48 to $35.16, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.48 to $36.12, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.32 to $34.30, 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), (4), (6), (7), (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 $34.48 to $35.44, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.48 to $36.29, 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 14 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 $33.32 to $33.86, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.48 to $35.41, 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 14 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 $34.48 to $35.40, inclusive. /s/ Kristie Scott, Attorney-in-Fact 2022-06-13