Backblaze, Inc. (BLZE) Institutional Ownership

Ownership Summary

Recent 13F filings as of September 2025 show that 147 institutional investors hold a position in Backblaze, Inc. (NASDAQ:BLZE).

• Backblaze saw its institutional ownership percentage rose to 53.0% in September 2025 from 48.2% in June 2025.
• In percentage terms, this reflects as a holdings change of 17.67% quarter on quarter, and an increase of 44.12% year over year.
• Of these 147 institutional investors, 83 increased their holdings in Backblaze, while 42 of them reduced positions, and 22 investors maintained their exposure.
• This class of investors increased its holdings in Backblaze to 29.94Mn shares for the 13F-cycle ending September 2025, up by 4.49Mn shares quarter on quarter, and up 13.73Mn shares year over year.
• The top institutional stake in Backblaze as of September 30, 2025 belongs to BlackRock, Inc., which owns 3.72Mn shares, or 6.59% of the company.
• Among the most significant buyers of Backblaze during September 2025 were WASATCH ADVISORS LP (1.83Mn), D. E. Shaw & Co., Inc. (321.68K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (299.67K), Whetstone Capital Advisors, LLC (265.91K), Shannon River Fund Management LLC (229.38K).
• Leading sellers of Backblaze stock in September 2025 included ROYAL BANK OF CANADA (583.39K), MARSHALL WACE, LLP (203.54K), Qube Research & Technologies Ltd (142.98K), Squarepoint Ops LLC (111.53K), Manatuck Hill Partners, LLC (90.00K).
• The top 10 institutional holders of Backblaze for the quarter ending September 2025 included BlackRock, Inc. (3.72Mn), AWM Investment Company, Inc. (3.06Mn), VANGUARD GROUP INC (2.69Mn), WASATCH ADVISORS LP (1.83Mn), Whetstone Capital Advisors, LLC (1.46Mn), GEODE CAPITAL MANAGEMENT, LLC (1.29Mn), First Eagle Investment Management, LLC (1.13Mn), STATE STREET CORP (1.06Mn), Connor, Clark & Lunn Investment Management Ltd. (953.91K), MILLENNIUM MANAGEMENT LLC (870.25K).