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Who owns Fastly (FSLY) stock

274 funds reported Fastly (FSLY) shares in their latest 13F filings, worth $2.8B in all. The largest holder is BlackRock ($279M). Last quarter 137 funds added to their stakes and 179 cut them.

Largest holders of FSLY (13F)Largest holders of FSLY (13F)BlackRock$279MFMR LLC$218MVanguard Portfolio Management LLC$180MVanguard Group$173MCapital World Investors$151MFirst Trust Advisors LP$141MD. E. Shaw$121MVanguard Capital Management LLC$116MTwo Sigma Investments, LP$111MLegal & General Group$80.1M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock15,222,887$279Mincrease2026-06-30
FMR LLC11,892,230$218Mincrease2026-06-30
Vanguard Portfolio Management LLC9,814,704$180Mdecrease2026-06-30
Vanguard Group16,976,906$173Mincrease2025-12-31
Capital World Investors8,228,136$151Mincrease2026-06-30
First Trust Advisors LP7,681,005$141Mincrease2026-06-30
D. E. Shaw6,616,726$121Mincrease2026-06-30
Vanguard Capital Management LLC6,314,616$116Mincrease2026-06-30
Two Sigma Investments, LP6,062,511$111Mincrease2026-06-30
Legal & General Group4,366,475$80.1Mdecrease2026-06-30
Geode Capital Management, LLC3,910,461$71.8Mincrease2026-06-30
State Street3,537,037$64.9Mincrease2026-06-30
Alyeska Investment Group, L.P.3,165,326$58.1Mnew2026-06-30
Dimensional Fund Advisors LP3,064,798$56.3Mincrease2026-06-30
Jane Street Group, LLC2,599,187$47.7Mincrease2026-06-30

Fastly's latest quarter

Fastly, Q3 2026: revenue $190M (+20% year over year), operating margin -5.9%, net loss $11.3M, operating cash flow $40.0M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most FSLY stock?

By the latest 13F filings: BlackRock ($279M); FMR LLC ($218M); Vanguard Portfolio Management LLC ($180M); Vanguard Group ($173M); Capital World Investors ($151M).

What is the short interest in FSLY?

20,581,799 shares were sold short at the 2026-10-15 settlement, -2.86% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.