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Outage in Alpaca

Investigating Issue with Double Executions

Resolved Minor
May 21, 2026 - Started 4 days ago - Lasted about 6 hours
Official incident page

Incident Report

We are currently investigating a technical issue that caused some orders to receive duplicate executions following a restart of the principal engine. This may result in some customers temporarily seeing incorrect filled quantities or affected buying power. Our engineering team is actively working to resolve this We will provide an update once the corrections are complete.

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Latest Updates ( sorted recent to last )
RESOLVED 3 days ago - at 05/21/2026 08:36PM

All duplicate orders have been sorted and we are seeing accounts are restored to normal. We will consider this issue as resolved. Thank you for your patience and understanding.

MONITORING 3 days ago - at 05/21/2026 07:39PM

Our team team has implemented a fix and we are monitoring to ensure services are restored. We will continue to update you as we monitor. Thank you for your patience.

MONITORING 3 days ago - at 05/21/2026 07:15PM

Our team is continuing to work on resolving this as quickly as possible. We will continue to update you as we progress. Thank you for your patience.

MONITORING 3 days ago - at 05/21/2026 06:57PM

We anticipate a fix to be complete shortly. We will continue to update you as we progress.

IDENTIFIED 3 days ago - at 05/21/2026 06:41PM

Our team is actively working on a fix for buying power and resolving duplicate orders as a high priority. We will continue to update you as we work towards a resolution. We greatly appreciate your patience.

IDENTIFIED 3 days ago - at 05/21/2026 06:27PM

Our team is actively working on a fix for buying power and resolving duplicate orders as a high priority. We will continue to update you as we work towards a resolution. We greatly appreciate your patience.

IDENTIFIED 3 days ago - at 05/21/2026 06:17PM

Our team is actively working on a fix for buying power and resolving duplicate orders as a high priority. We will continue to update you as we work towards a resolution.

IDENTIFIED 3 days ago - at 05/21/2026 06:06PM

We have identified the issue which affected buying power. Our team is actively working on a fix for buying power and resolving duplicate orders as a high priority. We will continue to update you as we investigate.

IDENTIFIED 3 days ago - at 05/21/2026 05:53PM

We have identified the issue which affected buying power. Our team is actively working on a fix for buying power and resolving duplicate orders as a high priority. We will continue to update you as we investigate.

IDENTIFIED 4 days ago - at 05/21/2026 05:43PM

We have identified the issue which affected buying power. Our team is actively working on a fix for buying power and resolving duplicate orders as a high priority. We will continue to update you as we investigate.

INVESTIGATING 4 days ago - at 05/21/2026 05:25PM

We are continuing to investigate the buying power issue affecting accounts impacted by the earlier duplicate execution. Our team is actively working on a fix as a high priority. We will continue to update you as we investigate.

INVESTIGATING 4 days ago - at 05/21/2026 05:15PM

We are continuing to investigate the buying power issue affecting accounts impacted by the earlier duplicate execution. Our team is actively working on a fix as a high priority. We will continue to update you as we investigate.

MONITORING 4 days ago - at 05/21/2026 05:04PM

We have identified a buying power issue affecting accounts impacted by the earlier duplicate execution. Our team is actively working on a fix as a high priority. We will update you once resolved.

MONITORING 4 days ago - at 05/21/2026 04:44PM

Our team is continuing to work on the resolution. We will provide another update once the corrected trade events have been sent.

MONITORING 4 days ago - at 05/21/2026 03:46PM

We are now preparing to send the corrected trade events and will confirm once they have been processed.

MONITORING 4 days ago - at 05/21/2026 03:22PM

We have completed our corrections and the accurate filled quantities should now be reflected in customer accounts. Our teams are now finalising any outstanding data clean up and will provide a formal trade event notification and final update once this is completed.

IDENTIFIED 4 days ago - at 05/21/2026 02:40PM

All affected orders have been identified. Corrections are in progress and we will confirm once fully resolved.

INVESTIGATING 4 days ago - at 05/21/2026 02:33PM

We are currently investigating a technical issue that caused some orders to receive duplicate executions following a restart of the principal engine. This may result in some customers temporarily seeing incorrect filled quantities or affected buying power. Our engineering team is actively working to resolve this We will provide an update once the corrections are complete.

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