46d agoThe Motley FoolNEUTRAL 48General
Fastly's CTO Sells Over 33,000 Shares for $825,000 After the Stock Rose 177% Over the Past Year
The specialized edge cloud infrastructure provider disclosed a notable insider stock sale.
Archived explainer. For the current picture see today's FSLY page.
Why Is FASTLY INC A (FSLY) Stock Down Today?
By the Top Tier Newswire AI Desk · September 22, 2026 at 12:54 PM ET · reviewed against 8 wire stories
FASTLY INC A (FSLY) is down -7.46% in the latest session. Our newswire has captured 8 stories on FSLY across 7 sources in the last 36 hours, with AI sentiment reading bullish (avg 62/100).
Public view, delayed 4h. Every headline, price and sentiment read below — and this write-up itself — reaches Pro subscribers live. Public readers see it once it clears the delay.
FASTLY INC A (FSLY) fell 7.46% to $25.38 in a volatile session driven by a sharp intraday reversal following a recent rally and a wave of insider selling. The stock opened with a 0.7% gap up but dropped sharply after midday, reaching a session low of $25.11. The decline coincided with multiple insider sales and a broader market reassessment of momentum in the edge cloud infrastructure sector.
What Happened
The stock had surged 14% earlier in the week following Fastly's announcement of new AI security tools, including an AI Firewall and Runtime Control. These tools were positioned to address machine-generated traffic, which the company reported now exceeds 50% of its network activity. However, the rally coincided with a wave of insider selling, including a $825,000 sale by the CTO and other executives. The selling pressure intensified as the stock approached its 52-week high of $34.82. A separate deal with Comcast was cited as a potential catalyst, but the stock reversed course after midday as buyers withdrew.
What The Data Shows
The session opened at $27.61 and peaked at $28.84 before turning sharply lower. Volume reached 4.8 million shares, or 0.8 times the 3-month average, with unusual options activity skewed entirely to calls. Over the past 8 sessions, the stock had risen 19.4% from $23.16 to $27.66. Insider sales in the last 90 days totaled $19.4 million, with no insider purchases recorded. The stock also printed one fresh 52-week low on 2026-09-22.
What To Watch
The stock is currently unprofitable with a trailing twelve-month net margin of -11.8% and a beta of 0.36. No earnings date is provided, but coverage breadth remains elevated with eight stories from seven sources in the last 36 hours. Investors should monitor the continuation of insider selling and the broader market reaction to AI infrastructure plays.
AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.
FSLY by the numbers
Last: $25.38Session: -7.46%7 sessions: +12.61%Coverage: 8 stories / 7 sourcesAI sentiment: 62/100 (bullish)Mkt cap: $3.8B52w: $7.74 to $34.82
The headlines behind the move
46d agoThe FlyBULLISH 62General
Fastly Inc call volume above normal and directionally bullish
46d ago24/7 Wall St.BULLISH 67Product/PR
Fastly Soars 14% on AI Firewall Launch; Cloudflare Climbs 7%, Datadog Rises 5%
Fastly (NASDAQ:FSLY) is at the center of a same-session bid across edge security and artificial intelligence (AI) traffic infrastructure, with two large peers rising alongside it on no news of their own. The move looks like buyers repricing a category rather than reacting to an isolated launch. The First Trust Cloud Computing ETF (NASDAQ:SKYY) is […]
46d agoTipRanksBULLISH 67Product/PR
Comcast Stock (NASDAQ:CMCSA) Levers Up After Deal With Fastly
Entertainment giant Comcast ($CMCSA) recently set up a new deal with Fastly ($FSLY), and it could be quite the winner for both sides. The new deal brings Fastly’s e...
46d agoMarketChameleonBULLISH 67Product/PR
Fastly Rallies as It Says Machine-Generated Traffic Topped 50% on Its Network and Launches New AI Security Controls September 21, 2026
Fastly announced AI Runtime Control, AI Firewall, and expanded API Security capabilities aimed at giving organizations real-time visibility and control across AI systems. The company tied the launch to a shift it says it is already seeing on its network—machine-generated traffic crossing 50% in July and August and AI traffic growing 6.5 times faster than human traffic from January through May.
46d agoMarketChameleonBULLISH 67Product/PR
Fastly Expands “Fastly for AI” With Runtime Control and an AI Firewall as Machine Traffic Tops 50% on Its Network September 21, 2026
Fastly (FSLY) announced AI Runtime Control, AI Firewall, and expanded API Security capabilities aimed at governing model access, blocking LLM-based attacks like prompt injection, and enforcing API contracts for AI agents. The company tied the launch to shifting network dynamics, noting machine-generated traffic crossed 50% in July and August and that AI traffic grew 6.5x faster than human traffic from January through May.
46d agoYahoo TopBULLISH 57Analyst
Should You Be Bullish on Fastly (FSLY)?
Carillon Tower Advisers, an investment management company, released its second-quarter 2026 investor letter for the “Carillon Eagle Small Cap Growth Fund”. The letter can be downloaded here. Small-cap stocks rallied broadly in the second quarter, with the Russell 2000 Growth Index (+25.71%) outpacing Value +17.24%). Information Technology (+46.79%) led all sectors, supported by solid gains […]
46d agoStockTitanBULLISH 63Product/PR
Fastly Launches AI Firewall and AI Runtime Control to Secure and Scale AI
Fastly’s new AI tools are now available on a platform with 622 Tbps capacity and more than five trillion daily requests, measured in 2026.
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More on FSLY: full news and sentiment history. Sentiment scores are AI-derived research signals, not financial advice.
Earlier FSLY move explainers: 2026-10-13 · 2026-10-09 · 2026-09-25 · 2026-09-24 · 2026-09-23 · 2026-09-22 · 2026-09-21 · 2026-09-18 · 2026-09-09 · 2026-09-02 · 2026-09-01 · 2026-08-25 · 2026-08-24 · 2026-08-20 · 2026-08-19 · 2026-07-17