Fastly, Inc. (FSLY) Institutional Ownership

Ownership Summary

Fastly, Inc. (NASDAQ:FSLY) currently has 8 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

• The percentage of Fastly owned by institutions changed from 71.9% in September 2025 to 0.3% in December 2025, marking a slight down trend.
• In percentage terms, this reflects as a holdings change of 65.05% quarter on quarter, and a decrease of 96.49% year over year.
• The latest 13F cycle for Fastly reveals that of 8 total investors, 4 funds grew their exposure, whereas 1 reduced theirs and 3 made no changes.
• The total number of shares held by institutions in Fastly increased to 427.27K as of December 2025, a net change of up by 168.39K shares quarter on quarter, and down 94.05Mn shares year over year.
• As of December 31, 2025, SG Americas Securities, LLC held Fastly's largest shareholding position with over 345.83K shares, representing 0.23% of total outstanding shares.
• Among the most significant buyers of Fastly during December 2025 were SG Americas Securities, LLC (164.99K), 180 WEALTH ADVISORS, LLC (2.86K), Aventura Private Wealth, LLC (382), GAMMA Investing LLC (196).
• Leading sellers of Fastly stock in December 2025 included Versant Capital Management, Inc (38).
• The top 8 institutional holders of Fastly for the quarter ending December 2025 included SG Americas Securities, LLC (345.83K), 180 WEALTH ADVISORS, LLC (79.22K), Versant Capital Management, Inc (632), Aventura Private Wealth, LLC (500), GAMMA Investing LLC (485), ADIRONDACK TRUST CO (310), True Wealth Design, LLC (181), Holos Integrated Wealth LLC (113).