Fastly, Inc. (FSLY) Institutional Ownership

Ownership Summary

A total of 47 institutions have reported a stake in Fastly, Inc. (NASDAQ:FSLY) as of December 2025, according to recent 13F filings with the SEC.

• The percentage of Fastly owned by institutions changed from 73.2% in September 2025 to 14.9% in December 2025, marking a slight down trend.
• Quarterly data indicates a 16.08% shift in institutional share volume, and the annual owner count reflects a decrease of 79.39%.
• The latest 13F cycle for Fastly reveals that of 47 total investors, 25 funds grew their exposure, whereas 6 reduced theirs and 16 made no changes.
• The total number of shares held by institutions in Fastly increased to 21.54Mn as of December 2025, a net change of up by 2.98Mn shares quarter on quarter, and down 72.94Mn shares year over year.
• VANGUARD GROUP INC continues to be the largest institutional holder of Fastly as of December 31, 2025, with a position of 16.98Mn shares, representing 11.72% of the company's outstanding stock.
• Among the most significant buyers of Fastly during December 2025 were UBS Group AG (2.59Mn), VANGUARD GROUP INC (310.23K), SG Americas Securities, LLC (164.99K), Zurcher Kantonalbank (Zurich Cantonalbank) (12.85K), Twelve Points Wealth Management LLC (12.24K).
• Leading sellers of Fastly stock in December 2025 included IMC-Chicago, LLC (125.77K), Concurrent Investment Advisors, LLC (7.20K), Mirae Asset Global Investments Co., Ltd. (2.34K), Arizona State Retirement System (1.79K), Versant Capital Management, Inc (38).
• The top 10 institutional holders of Fastly for the quarter ending December 2025 included VANGUARD GROUP INC (16.98Mn), UBS Group AG (3.45Mn), SG Americas Securities, LLC (345.83K), Relyea Zuckerberg Hanson LLC (273.84K), IMC-Chicago, LLC (95.45K), 180 WEALTH ADVISORS, LLC (79.22K), Zurcher Kantonalbank (Zurich Cantonalbank) (54.35K), Concurrent Investment Advisors, LLC (38.99K), Arizona State Retirement System (38.92K), KLP KAPITALFORVALTNING AS (29.90K).