X0609 4 2026-05-21 false 0001657573 Xometry, Inc. XMTR 0001869814 Altschuler Randolph false C/O XOMETRY, INC. 6116 EXECUTIVE BLVD, SUITE 800 NORTH BETHESDA MD 20852 true true false false Chief Executive Officer false Class A Common Stock 2026-05-21 4 S false 11731.00 86.7084 D 579539.00 I Held by spouse Class A Common Stock 2026-05-21 4 S false 9893.00 87.638 D 569646.00 I Held by spouse Class A Common Stock 2026-05-21 4 S false 1439.00 88.5659 D 568207.00 I Held by spouse Class A Common Stock 2026-05-21 4 S false 4892.00 89.696 D 563315.00 I Held by spouse Class A Common Stock 2026-05-21 4 S false 1579.00 90.4811 D 561736.00 I Held by spouse Class A Common Stock 2026-05-21 4 S false 466.00 91.60 D 561270.00 I Held by spouse Class A Common Stock 2026-05-21 4 S false 8187.00 86.7463 D 467061.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2026-05-21 4 S false 6324.00 87.6297 D 460737.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2026-05-21 4 S false 1109.00 88.678 D 459628.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2026-05-21 4 S false 3293.00 89.684 D 456335.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2026-05-21 4 S false 823.00 90.5751 D 455512.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 2026-05-21 4 S false 264.00 91.60 D 455248.00 I Held by the Altschuler Family Trust (2020) Class A Common Stock 434472.00 D Class A Common Stock 85582.00 I Held by the 2021 Tigers Trust Class A Common Stock 324533.00 I Held by The Matthew Sladkin Altschuler 2012 Trust Class A Common Stock 324533.00 I Held by The Noah Sladkin Altschuler 2012 Trust Class A Common Stock 324533.00 I Held by The Sasha Sladkin Altschuler 2012 Trust Class B Common Stock 1475311.00 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.19 to $87.18, 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 (1) through (10) 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 $90.325 to $90.725, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.19 to $88.18, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.245 to $89.21, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.315 to $90.28, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.32 to $90.72, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.19 to $87.18, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.19 to $88.17, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.23 to $89.21, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.265 to $90.25, inclusive. /s/ Kristie Scott, Attorney-in-Fact 2026-05-22