Artius II Acquisition AACBR Institutional Ownership

Ownership Summary

Artius II Acquisition Inc. (NASDAQ:AACBR) has 34 institutional investors that have filed 13F reports for the period ending March 2026.

• Their combined ownership stood at 91.9% of outstanding shares in March 2026, down from 112.4% in December 2025.
• Their total shares held in AACBR decreased -6.83% quarter over quarter, and separately, investors owning Artius II Acquisition stayed flat from a year ago.
• Of these 34 holders, 3 added to their stakes in Artius II Acquisition, 11 trimmed positions, and 20 made no changes.
• The aggregate institutional position in Artius II Acquisition amounted to 20.22Mn shares as of March 2026, down by 1.48Mn shares quarter on quarter, and with no net change year over year.
• As of March 31, 2026, HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND held the largest stake in Artius II Acquisition with 2.0Mn shares, accounting for 9.09% of total shares outstanding.
• The most significant purchases of AACBR for the quarter ending March 2026 came from K2 PRINCIPAL FUND, L.P. (112.01K), RLH Capital LLC (100.0K), METEORA CAPITAL, LLC (16.6K).
• Top sellers of AACBR stock for the quarter ending March 2026 included Alberta Investment Management Corp (980.0K), Alpine Global Management, LLC (335.4K), Shaolin Capital Management LLC (150.0K), Berkley W R Corp (67.1K), GLAZER CAPITAL, LLC (50.0K).
• Artius II Acquisition's 10 largest shareholders as of March 2026 include HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND (2.0Mn), Sculptor Capital LP (1.98Mn), Polar Asset Management Partners Inc. (1.5Mn), HGC Investment Management Inc. (1.5Mn), AQR Arbitrage LLC (1.49Mn), LINDEN ADVISORS LP (1.38Mn), Harraden Circle Investments, LLC (1.34Mn), Alberta Investment Management Corp (980.0K), MILLENNIUM MANAGEMENT LLC (700.0K), Toronto Dominion Bank (600.28K) per Business Quant data.