Pacific Biosciences Of California PACB Institutional Ownership

Ownership Summary

Pacific Biosciences Of California, Inc. (NASDAQ:PACB) showed up in the 13F filings of 228 institutional investors as of March 2026.

• Collectively, these holders controlled 61.5% of Pacific Biosciences Of California's outstanding shares in March 2026, down from 67.4% in December 2025.
• They increased total shares held in Pacific Biosciences Of California by 6.29% from the prior quarter, while the number of investors in PACB stayed flat year over year.
• Of these 228 funds, 111 grew their exposure to Pacific Biosciences Of California, 73 cut back, and 44 maintained positions.
• In total, institutional investors held 188.17Mn shares in Pacific Biosciences Of California as of March 2026, up by 11.13Mn shares quarter on quarter, and down 43.4Mn shares year over year.
• As of March 31, 2026, ARK Investment Management LLC held the largest stake in Pacific Biosciences Of California with 36.27Mn shares, accounting for 11.86% of total shares outstanding.
• Leading buyers of Pacific Biosciences Of California shares for the quarter ending March 2026 were VANGUARD CAPITAL MANAGEMENT LLC (12.78Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.87Mn), Nuveen, LLC (2.1Mn), VANGUARD FIDUCIARY TRUST CO (1.99Mn), BlackRock, Inc. (1.92Mn).
• The largest sales of PACB for the quarter ending March 2026 came from Casdin Capital, LLC (3.5Mn), Point72 Asset Management, L.P. (2.67Mn), Goldman Sachs Group Inc (1.77Mn), CITADEL ADVISORS LLC (1.59Mn), UBS Group AG (1.53Mn).
• Per Business Quant data, the top 10 holders of Pacific Biosciences Of California for the quarter ending March 2026 are ARK Investment Management LLC (36.27Mn), BlackRock, Inc. (25.27Mn), SOFTBANK GROUP CORP. (20.45Mn), VANGUARD CAPITAL MANAGEMENT LLC (12.78Mn), Amova Asset Management Americas, Inc. (7.04Mn), Sumitomo Mitsui Trust Group, Inc. (7.04Mn), GEODE CAPITAL MANAGEMENT, LLC (6.98Mn), State Street Corp (6.12Mn), MILLENNIUM MANAGEMENT LLC (4.89Mn), D. E. Shaw & Co., Inc. (3.64Mn).