Pacific Biosciences Of California, Inc. (PACB) Institutional Ownership

Ownership Summary

Pacific Biosciences Of California, Inc. (NASDAQ:PACB) has 209 institutional investors that have filed 13F reports for the period ending December 2025.

• These investors held 66.7% of outstanding shares in December 2025, up from 62.7% in September 2025.
• They increased total shares held in Pacific Biosciences Of California by 20.64% from the prior quarter, while the number of investors in PACB decreased 6.28% year over year.
• Of these 209 holders, 110 added to their stakes in Pacific Biosciences Of California, 53 trimmed positions, and 46 made no changes.
• In total, institutional investors held 200.63Mn shares in Pacific Biosciences Of California as of December 2025, up by 34.32Mn shares quarter on quarter, and down 67.01Mn shares year over year.
• ARK Investment Management LLC holds the largest position in PACB at 37.26Mn shares as of December 31, 2025, or 12.39% of shares outstanding.
• The largest buyers of Pacific Biosciences Of California for the quarter ending December 2025 were ARK Investment Management LLC (6.34Mn), D. E. Shaw & Co., Inc. (4.44Mn), RENAISSANCE TECHNOLOGIES LLC (3.85Mn), Casdin Capital, LLC (3.5Mn), Point72 Asset Management, L.P. (2.96Mn).
• Top sellers of PACB stock for the quarter ending December 2025 included Bank Of America Corp /De/ (1.09Mn), Amova Asset Management Americas, Inc. (868.98K), Sumitomo Mitsui Trust Group, Inc. (868.98K), Koss-Olinger Consulting, LLC (700.0K), MILLENNIUM MANAGEMENT LLC (572.23K).
• Business Quant data shows the 10 biggest positions in Pacific Biosciences Of California as of December 2025 are held by ARK Investment Management LLC (37.26Mn), BlackRock, Inc. (23.34Mn), SOFTBANK GROUP CORP. (20.45Mn), VANGUARD GROUP INC (17.04Mn), Amova Asset Management Americas, Inc. (7.81Mn), Sumitomo Mitsui Trust Group, Inc. (7.81Mn), GEODE CAPITAL MANAGEMENT, LLC (7.08Mn), State Street Corp (5.91Mn), D. E. Shaw & Co., Inc. (4.44Mn), MILLENNIUM MANAGEMENT LLC (4.34Mn).