Ouster, Inc.

Ouster, Inc., trading under the ticker CLA, filed a DEFA14A — additional definitive proxy materials — with the SEC on May 15, 2026, under accession number 0001193125-26-226667. The filing relates to Colonnade Acquisition Corp., the blank-check company sponsored by Colonnade Acquisition LLC that completed its initial public offering in 2020 and subsequently merged with Ouster, a lidar sensor manufacturer serving the autonomous vehicle and industrial technology sectors. DEFA14A filings supplement previously distributed proxy statements and are typically circulated ahead of a shareholder vote on a pending corporate action. Visit SpacDesk and sign up for a full account to access complete filing histories, sponsor profiles, and real-time deal tracking for CLA and hundreds of other SPAC transactions.