Zscaler, Inc. (ZS)
ZS moved a median of +0.15% 30 minutes after news, and +0.13% by the close. How ZS actually reacts to news — the realized, point-in-time move the market made, measured across 524 labeled events over the last three years with zero look-ahead.
ZS’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.12% | 56% | 524 |
| 30-min | +0.15% | 55% | 524 |
| 60-min | +0.15% | 58% | 524 |
| to close | +0.13% | 53% | 523 |
| Middle 50% of ZS reactions | -0.70% to +1.16% |
|---|---|
| Median reaction (30-min) | +0.15% |
| Measured reactions | 524 |
Half of all Zscaler, Inc. news events land between -0.70% and +1.16% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How ZS reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 68 | +0.29% | 62% | +0.90% |
| Analyst downgrades | 32 | -0.39% | 28% | +0.58% |
| Coverage initiations | 36 | +0.70% | 75% | +1.12% |
| Rating reiterations | 439 | +0.12% | 54% | +0.31% |
| Price-target raises | 122 | +0.18% | 62% | +0.63% |
| Price-target cuts | 78 | -0.31% | 42% | -0.28% |
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 ZS ranks against every other measured name →
That’s how ZS usually reacts — get an email when it moves on news →Email me when ZS moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ZS's baseline. Nothing else.
Recent ZS events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Zscaler, Inc. (ZS) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.19% | +0.78% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Zscaler, Inc. (ZS) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.05% | -1.09% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Zscaler, Inc. (ZS) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | +0.37% | -1.31% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Zscaler, Inc. (ZS) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.75% | -4.31% | |
| Zscaler, Inc. (ZS) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.09% | -0.30% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Zscaler, Inc. (ZS) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.10% | +1.95% | |
| Form 8-K Zscaler, Inc. For: Oct 06 | SEC filing · Form 8-K | SEC EDGAR | +2.43% | +1.07% | |
| Zscaler Hosts 2026 Investor Day, Reaffirms First Quarter and Fiscal 2027 Guidance | Press release | GlobeNewswire | +2.43% | +1.07% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Zscaler, Inc. (ZS) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.03% | -0.30% | |
| Zscaler Collaborates with IBM and Red Hat to Protect Private Applications from Frontier AI-Powered Threats | Press release | GlobeNewswire | +1.99% | +2.37% | |
| New Zscaler Report Reveals AI-Assisted Attackers Move to Massive Data Theft, Executive Targeting, and Millions in Extortion Payments | Press release | GlobeNewswire | -0.66% | +0.21% | |
| Form 8-K Zscaler, Inc. For: Sep 24 | SEC filing · Form 8-K | SEC EDGAR | -1.32% | -6.17% | |
| Zscaler Appoints Ross Tackett as Chief Revenue Officer | Press release | GlobeNewswire | -1.32% | -6.17% | |
| Zscaler to Host Investor Day on October 6 | Press release | GlobeNewswire | -0.14% | +0.10% | |
| Zscaler launches Agentic SOC to contain AI-Driven Threats | Press release | GlobeNewswire | +0.14% | +2.66% | |
| Zscaler to Present at Upcoming Investor Conferences | Press release | GlobeNewswire | +2.44% | +1.99% | |
| Form 10-K Zscaler, Inc. For: Jul 31 | SEC filing · Form 10-K | SEC EDGAR | +2.44% | +1.99% | |
| Form 8-K Zscaler, Inc. For: Sep 01 | SEC filing · Form 8-K | SEC EDGAR | +2.44% | +1.99% | |
| Form S-8 Zscaler, Inc. | SEC filing · Form S-8 | SEC EDGAR | +2.44% | +1.99% | |
| Zscaler Announces Strong Fourth Quarter and Fiscal 2026 Financial Results | Press release | GlobeNewswire | +2.44% | +1.99% | |
| Deep Cogito Raises $43M Series A to Advance the Post-Training Engine for Frontier Intelligence | Press release | Business Wire | +0.19% | +1.74% | |
| Zscaler and Carahsoft Expand Partnership to Deliver Enterprise-Proven Zero Trust Security to SMB and Mid-Market Customers | Press release | GlobeNewswire | +2.02% | +0.22% | |
| Zscaler to Host Fourth Quarter Fiscal Year 2026 Earnings Conference Call | Press release | GlobeNewswire | +0.76% | +4.22% | |
| Zscaler Recognized as a Leader in Both the 2026 Gartner® Magic Quadrant™ for SASE Platforms and 2026 Magic Quadrant™ for Security Service Edge | Press release | GlobeNewswire | -0.07% | +1.43% | |
| Zscaler and Schwarz Digits Partner to Deliver Sovereign Cloud Security Platform for Europe | Press release | GlobeNewswire | -0.18% | +3.08% | |
| Jake Brander & Escrow.com Dive into the $15 Billion IPv4 Address Trade | Press release | PR Web | +0.30% | +1.52% | |
| Racing Innovation Meets Zero Trust: Aston Martin Aramco Formula One™ Team and Zscaler Redefine Speed and Security | Press release | GlobeNewswire | -0.93% | -2.29% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Zscaler, Inc. (ZS) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.62% | +4.26% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Zscaler, Inc. (ZS) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | +0.49% | -2.25% | |
| Zscaler Redefines Zero Trust SASE for the AI Era | Press release | GlobeNewswire | -0.02% | +0.74% | |
| Zscaler Research Finds Cybercrime Economics Are Shifting as AI Trades Mass Volume for Lethal Precision | Press release | GlobeNewswire | -0.02% | +0.74% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Zscaler, Inc. (ZS) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | -0.33% | +0.25% | |
| Zscaler Expands AI-Guardian, Uniting Tech Giants to Secure Enterprise AI at Scale | Press release | GlobeNewswire | +0.42% | +0.53% | |
| Zscaler Unveils New Product Innovations to Secure Agentic AI | Press release | GlobeNewswire | -0.29% | +0.29% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Zscaler, Inc. (ZS) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | +0.20% | -0.41% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Zscaler, Inc. (ZS) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -1.66% | -1.19% | |
| Zscaler, Inc. (ZS) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.16% | -1.16% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Zscaler, Inc. (ZS) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.92% | +1.54% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Zscaler, Inc. (ZS) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | -0.16% | +0.51% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Zscaler, Inc. (ZS) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | +1.85% | +7.76% | |
| Zscaler, Inc. (ZS) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.30% | +4.21% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Zscaler, Inc. (ZS) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.49% | +3.67% | |
| Zscaler Investigation Initiated: SueWallSt Investigates the Officers and Directors of Zscaler (ZS) | Press release | PR Newswire | -2.52% | +2.79% | |
| Form 10-Q Zscaler, Inc. For: Apr 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.64% | -7.48% | |
| Form 8-K Zscaler, Inc. For: May 26 | SEC filing · Form 8-K | SEC EDGAR | +0.64% | -7.48% | |
| Zscaler Announces Strong Third-Quarter Fiscal 2026 Results | Press release | GlobeNewswire | +0.64% | -7.48% | |
| Zscaler to Acquire Symmetry Systems, Combining Zero Trust and Access Graph Technology to Map and Secure AI Agent Communication | Press release | GlobeNewswire | +0.68% | -0.15% | |
| Zscaler to Present at Upcoming Investor Conferences | Press release | GlobeNewswire | +1.54% | +4.52% | |
| Zscaler Partners with Global System Integrators to Launch Project AI-Guardian to Help Accelerate Enterprise AI Adoption | Press release | GlobeNewswire | -0.13% | -2.45% | |
| Zscaler to Host Third Quarter Fiscal Year 2026 Earnings Conference Call | Press release | GlobeNewswire | +1.80% | +3.34% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ZS section they belong to.
Where else ZS is measured.
ZS earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Unisys Corporation New (UIS) | 527 | -0.12% | 45% |
| Motorola Solutions, Inc. (MSI) | 526 | +0.03% | 53% |
| MACOM Technology Solutions Holdings, Inc. (MTSI) | 523 | +0.07% | 52% |
| Universal Display Corporation (OLED) | 522 | +0.11% | 53% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Technology names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Zscaler, Inc.'s median reaction calculated?
Every labeled ZS 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 524 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. 55% of ZS'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 ZS'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.