Exhibit 21.1
List of Subsidiaries as of February 25, 2026
Subsidiary |
| Jurisdiction |
Capella Space Corp. |
| Delaware |
ID Quantique Limited |
| Republic of Korea |
ID Quantique Inc. |
| Delaware |
id Quantique SA |
| Switzerland |
IonQ Federal, LLC |
| Delaware |
IonQ Italia S.r.l. |
| Italy |
IonQ Quantum Acquisitions, Inc. |
| Delaware |
IonQ Quantum Canada, Inc. |
| Ontario |
IonQ Quantum International GmbH |
| Germany |
IonQ Quantum Israel Ltd. |
| Israel |
IonQ Quantum Switzerland GmbH |
| Switzerland |
IonQ Quantum UK Limited |
| England and Wales |
IonQ Quantum, Inc. |
| Delaware |
IonQ Sweden AB |
| Sweden |
Lightsynq Technologies, Inc. |
| Delaware |
Oxford Ionics DACH GmbH |
| Switzerland |
Oxford Ionics Limited |
| England and Wales |
Oxford Ionics North America Inc. |
| Delaware |
Seed Innovations, LLC |
| Delaware |
Skyloom Global, LLC |
| Delaware |
Vector Atomic, Inc. |
| Delaware |