EdgeMarketInstruments › FSLY

FSLY — Fastly, Inc.

US Technology Software & IT services equity mkt cap 3.6B
24.95 +9.86% today
USD · as of 2026-08-21

Price · 2024-08-26 → 2026-08-21

499 daily closes shown
52w low 7.23 · high 33.50

Anonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2019-05-17.

Performance

1 day+9.86%
1 week-16.64%
1 month+28.41%
3 months+52.13%
6 months+38.00%
Year to date+144.85%
1 year+246.53%
3 years+30.83%
5 years-40.75%

Technicals

RSI 1454.0
vs 50-day avg+17.42%
vs 200-day avg+38.07%
Volatility 1y120.6%
Max drawdown 1y-51.60%
Avg volume 30d6.3M
Daily bars held1,826
History from2019-05-17

Measured signals that fired on FSLY

datesignal measured base rate
2026-08-19Fair value gap, bearish
structure
-0.45% over 21 days · t = -3.29 · n = 108,591
statistically distinguishable from its control group
2026-08-05Bollinger bandwidth breaks out of its own compression
structure
-0.63% over 21 days · t = -2.80 · n = 7,196
statistically distinguishable from its control group
2026-08-05Fair value gap, bullish
structure
-0.67% over 21 days · t = -6.43 · n = 111,973
statistically distinguishable from its control group
2026-07-20Bollinger bandwidth breaks out of its own compression
structure
-0.63% over 21 days · t = -2.80 · n = 7,196
statistically distinguishable from its control group
2026-06-29Fair value gap, bullish
structure
-0.67% over 21 days · t = -6.43 · n = 111,973
statistically distinguishable from its control group
2026-06-02Cluster sale: three or more insiders
insider
-0.36% over 21 days · t = -3.35 · n = 21,529
statistically distinguishable from its control group

Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →

Insider transactions (Form 4)

dateinsiderwhatshares pricevalue
2026-08-19Bergman Artur
Chief Technology Officer
Open-market sale 10b5-1 plan16.4K24.98410.5K
2026-08-19Bergman Artur
Chief Technology Officer
Open-market sale 10b5-1 plan11.1K23.94265.4K
2026-08-19Compton Charles Lacey III
CEO
Open-market sale 10b5-1 plan5.4K25.08135.4K
2026-08-19Compton Charles Lacey III
CEO
Open-market sale 10b5-1 plan5.1K24.08122.8K
2026-08-19Bergman Artur
Chief Technology Officer
Open-market sale 10b5-1 plan4.2K25.78107.3K
2026-08-19Compton Charles Lacey III
CEO
Open-market sale 10b5-1 plan70026.0518.2K
2026-08-18WONG RICHARD
CFO
Open-market sale148.0K28.614.2M
2026-08-18Compton Charles Lacey III
CEO
Open-market sale 10b5-1 plan34.6K28.60988.2K
2026-08-18Bergman Artur
Chief Technology Officer
Open-market sale 10b5-1 plan32.4K28.60926.3K
2026-08-18Lovett Scott R.
President, Go to Market
Open-market sale14.9K28.60427.2K

Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →

Largest institutional holders

managervalueshares
BlackRock, Inc.361.5M12.4M
VANGUARD PORTFOLIO MANAGEMENT LLC320.2M11.0M
FMR LLC251.0M8.6M
Legal & General Group Plc234.2M8.1M
FIRST TRUST ADVISORS LP204.3M7.0M
VANGUARD CAPITAL MANAGEMENT LLC174.3M6.0M
TWO SIGMA INVESTMENTS, LP163.2M5.6M
VOYA INVESTMENT MANAGEMENT LLC114.2M3.9M
Capital World Investors109.1M3.8M
GEODE CAPITAL MANAGEMENT, LLC104.0M3.6M

13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →

Short selling

Avg short volume, 90d53.2% of tape
Days observed61

This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →

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