Fastly, Inc. - Class A (FSLY)
FSLY moved a median of -0.11% 30 minutes after news, and -0.28% by the close. How FSLY actually reacts to news — the realized, point-in-time move the market made, measured across 1,324 labeled events over the last three years with zero look-ahead.
FSLY’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.10% | 41% | 1,317 |
| 30-min | -0.11% | 44% | 1,317 |
| 60-min | 0.00% | 50% | 1,317 |
| to close | -0.28% | 44% | 1,313 |
| Middle 50% of FSLY reactions | -1.00% to +0.84% |
|---|---|
| Median reaction (30-min) | -0.11% |
| Measured reactions | 1,324 |
Half of all Fastly, Inc. - Class A news events land between -1.00% and +0.84% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How FSLY reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 23 | +1.45% | 70% | +0.64% |
| Analyst downgrades | 17 | +2.72% | 53% | +5.21% |
| Coverage initiations | 13 | -0.32% | 46% | -1.24% |
| Rating reiterations | 59 | +0.38% | 59% | +0.45% |
| Price-target raises | 21 | +0.46% | 81% | +2.15% |
| Price-target cuts | 10 | +0.20% | 50% | +1.00% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. See how FSLY ranks against every other measured name →
That’s how FSLY usually reacts — get an email when it moves on news →Email me when FSLY moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to FSLY's baseline. Nothing else.
Recent FSLY events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Fastly Named a Leader in 2026 IDC MarketScape for Worldwide WAAP Platforms | Press release | Business Wire | +0.30% | -5.94% | |
| Fastly Expands Partnership with Jio Platforms to Power the Next Generation of India’s Digital Economy | Press release | Business Wire | +1.99% | +3.44% | |
| Fastly to Announce Third Quarter 2026 Financial Results | Press release | Business Wire | +0.56% | +8.92% | |
| Fastly Launches AI Firewall and AI Runtime Control to Secure and Scale AI | Press release | Business Wire | -1.07% | +13.21% | |
| Form 8-K Fastly, Inc. For: Aug 17 | SEC filing · Form 8-K | SEC EDGAR | +3.13% | -7.03% | |
| Form S-3ASR Fastly, Inc. | SEC filing · Form S-3ASR | SEC EDGAR | -0.65% | -0.69% | |
| Fastly Announces Second Quarter 2026 Financial Results | Press release | Business Wire | +3.19% | -0.35% | |
| Form 10-Q Fastly, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +3.19% | -0.35% | |
| Form 8-K Fastly, Inc. For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | +3.19% | -0.35% | |
| Did Fastly, Inc. Insiders Breach their Fiduciary Duties to Shareholders? | Press release | PR Newswire | -0.03% | +2.27% | |
| Fastly to Present at Upcoming Investor Conferences | Press release | Business Wire | -3.65% | +4.05% | |
| Fastly Announces Upcoming Investor Day | Press release | Business Wire | -0.56% | -1.60% | |
| Fastly to Announce Second Quarter 2026 Financial Results | Press release | Business Wire | -0.99% | -5.59% | |
| Fastly Joins DIMPACT to Collaborate on Digital Sustainability | Press release | Business Wire | +2.65% | +8.76% | |
| Fastly Named a 2026 Gartner® Peer Insights™ Customers’ Choice for Edge Distribution Platforms | Press release | Business Wire | -1.24% | -1.80% | |
| Fastly and Skyfire Partner to Enable Trusted Agentic Commerce with Verified Identity at the Edge | Press release | Business Wire | +1.15% | +1.86% | |
| AI Traffic Grew 6.5x Faster Than Human Traffic This Year, Creating New Business Challenges and Opportunities | Press release | Business Wire | -0.47% | -2.61% | |
| Form 8-K Fastly, Inc. For: Jun 03 | SEC filing · Form 8-K | SEC EDGAR | +1.15% | +1.86% | |
| Fastly to Present at Upcoming Investor Conference | Press release | Business Wire | -2.64% | +6.28% | |
| Fleet Launches Mythos-ready Autonomous Endpoint Management | Press release | PR Newswire | -2.16% | -2.00% | |
| Fastly Announces Record First Quarter 2026 Financial Results | Press release | Business Wire | -5.76% | -13.95% | |
| Form 10-Q Fastly, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -5.76% | -13.95% | |
| Form 8-K Fastly, Inc. For: May 06 | SEC filing · Form 8-K | SEC EDGAR | -5.76% | -13.95% | |
| Form ARS Fastly, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -2.45% | +0.20% | |
| Form DEF 14A Fastly, Inc. For: Jun 03 | SEC filing · Form DEF | SEC EDGAR | -2.45% | +0.20% | |
| Form DEFA14A Fastly, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -2.45% | +0.20% | |
| Did Fastly, Inc. Insiders Breach their Fiduciary Duties to Shareholders? | Press release | PR Newswire | -12.02% | -23.58% | |
| Fastly and LALIGA Team Up on Joint Innovation to Combat Piracy | Press release | Business Wire | -1.49% | -9.74% | |
| Fastly to Announce First Quarter 2026 Financial Results | Press release | Business Wire | -12.02% | -23.58% | |
| Fastly Appoints Joan Jenkins as Chief Marketing Officer to Accelerate Growth and Market Leadership | Press release | Business Wire | +0.46% | +11.43% | |
| Fastly Named a Leader in Edge Development Platforms 2026 by Independent Research Firm | Press release | Business Wire | -1.04% | +1.37% | |
| Form 8-K Fastly, Inc. For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | +0.60% | +2.20% | |
| AI-First Businesses are Paying an “AI Speed Tax” when Recovering from Cybersecurity Incidents, according to Fastly’s Global Security Research Report | Press release | Business Wire | +0.34% | +2.72% | |
| Form 10-K Fastly, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.71% | -1.21% | |
| Form S-8 Fastly, Inc. | SEC filing · Form S-8 | SEC EDGAR | +0.71% | -1.21% | |
| HALPER SADEH LLC ENCOURAGES FASTLY, INC. SHAREHOLDERS TO CONTACT THE FIRM TO DISCUSS THEIR RIGHTS | Press release | PR Newswire | +0.71% | -1.21% | |
| Halper Sadeh LLC Encourages Fastly, Inc. Shareholders to Contact the Firm to Discuss Their Rights | Press release | GlobeNewswire | +1.28% | +0.40% | |
| Fastly Announces Both Record Fourth Quarter and Full Year 2025 Financial Results | Press release | Business Wire | +9.53% | +19.17% | |
| Form 8-K Fastly, Inc. For: Feb 11 | SEC filing · Form 8-K | SEC EDGAR | +9.53% | +19.17% | |
| Fastly, Inc. Reports Inducement Award Under Nasdaq Listing Rule 5635(c)(4) | Press release | Business Wire | +1.93% | +6.86% | |
| Fastly to Announce Fourth Quarter and Full Year 2025 Financial Results | Press release | Business Wire | -0.11% | -0.43% | |
| HALPER SADEH LLC ENCOURAGES FASTLY, INC. SHAREHOLDERS TO CONTACT THE FIRM TO DISCUSS THEIR RIGHTS | Press release | PR Newswire | -0.61% | -0.61% | |
| New Study Sponsored by Fastly Reveals Modern Application Security Programs Deliver 3x Better Business Outcomes | Press release | Business Wire | -0.59% | +4.69% | |
| Fastly Threat Insights Report Reveals Organizations are Fighting Back Against the Rise of the Bots | Press release | Business Wire | +0.79% | +1.79% | |
| Form 8-K Fastly, Inc. For: Dec 15 | SEC filing · Form 8-K | SEC EDGAR | +0.79% | +1.79% | |
| Form 8-K Fastly, Inc. For: Dec 03 | SEC filing · Form 8-K | SEC EDGAR | +0.32% | -2.95% | |
| Form 25 Fastly, Inc. | SEC filing · Form 25 | SEC EDGAR | -2.27% | -3.20% | |
| Form 8-A12B Fastly, Inc. | SEC filing · Form 8-A12B | SEC EDGAR | -2.27% | -3.20% | |
| Form CERT Fastly, Inc. | SEC filing · Form CERT | SEC EDGAR | -2.27% | -3.20% | |
| Fastly, Inc. Prices Upsized $160.0 Million Convertible Senior Notes Offering | Press release | Business Wire | -6.26% | -7.23% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the FSLY section they belong to.
Where else FSLY is measured.
FSLY earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Fastly, Inc. - Class A's median reaction calculated?
Every labeled FSLY news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 1,324 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 44% of FSLY's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does FSLY's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.