XMTR · Xometry, Inc.

Represents a restricted stock unit ("RSU") grant. The shares underlying the RSUs will vest quarterly over five years beginning on January 1, 2027, subject to the Reporting Person's continuous service.

Each RSU represents a contingent right to receive one share of the Class A Common Stock of the Issuer.

Represents shares sold in a transaction that 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 $90.48 to $91.22, 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) through (7) to this Form 4.

Represents shares sold in a transaction that 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 $96.10 to $96.56, inclusive.

Represents shares sold in a transaction that 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 $90.63 to $91.22, 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) through (7) to this Form 4.

Represents shares sold in a transaction that 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.

Represents shares sold in a transaction that 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 $92.15 to $92.97, inclusive.

Represents shares sold in a transaction that 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 $94.21 to $94.755, inclusive.

Represents shares sold in a transaction that 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 $94.41 to $94.84, inclusive.

Represents shares sold in a transaction that 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 $94.84 to $95.825, inclusive.

Represents shares sold in a transaction that 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 $95.32 to $96.10, inclusive.

Represents shares sold in a transaction that 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 $91.75 to $92.66, inclusive.

Represents shares sold in a transaction that 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 $91.57 to $92.47, inclusive.

Represents shares sold in a transaction that 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 $90.46 to $91.46, 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) through (8) to this Form 4.

Represents shares sold in a transaction that 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 $96.10 to $96.67, inclusive.

Represents shares sold in a transaction that 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 $94.21 to $94.84, inclusive.

Represents shares sold in a transaction that 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 $92.95 to $93.39, inclusive.

Represents shares sold in a transaction that 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 $92.90 to $93.895, inclusive.

Represents shares sold in a transaction that 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 $90.50 to $91.25, inclusive.

Represents shares sold in a transaction that 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 $92.82 to $93.615, inclusive.

Represents shares sold in a transaction that 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 $93.405 to $93.625, inclusive.

Represents shares sold in a transaction that 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 $95.64 to $96.54, inclusive.

Represents shares sold in a transaction that 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 $91.56 to $92.49, inclusive.

Represents shares sold in a transaction that 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 $96.37 to $97.205, inclusive.

Represents shares sold in a transaction that 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 $97.18 to $97.395, inclusive.

Represents shares sold in a transaction that 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.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $96.81 to $97.56, inclusive.

Represents shares sold in a transaction that 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.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.52 to $96.51, 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), and (5) through (10) to this Form 4.

Represents shares of the Issuer's Class A common stock purchased by the Reporting Person in an underwritten public offering at the public offering price.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.18 to $95.51, inclusive.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.56 to $99.595, inclusive.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.135 to $94.99, 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) through (7) to this Form 4.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.325 to $98.77, inclusive.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $97.275 to $98.255, inclusive.

Represents shares sold in a transaction that 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $96.235 to $97.215, inclusive.

Represents shares sold in a transaction that 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.

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 $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 $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 $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 $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 $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 $89.265 to $90.25, 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.

Represents a restricted stock unit ("RSU") grant. One third (1/3) of the shares underlying the RSUs will vest on each of July 1, 2026, October 1, 2026 and January 1, 2027, subject to the Reporting Person's continuous service.

Each RSU represents a contingent right to receive one share of the Class A Common Stock of the Issuer.