Zendesk, Inc. (ZEN)
ZEN moved a median of +0.06% 30 minutes after news, and +0.07% by the close. How ZEN actually reacts to news — the realized, point-in-time move the market made, measured across 2,000+ labeled events over its full measured history with zero look-ahead.
ZEN’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.07% | 56% | 1,978 |
| 30-min | +0.06% | 53% | 1,979 |
| 60-min | +0.07% | 54% | 1,979 |
| to close | +0.07% | 52% | 1,979 |
| Middle 50% of ZEN reactions | -0.56% to +0.73% |
|---|---|
| Median reaction (30-min) | +0.06% |
| Measured reactions | 2,000+ |
Half of all Zendesk, Inc. news events land between -0.56% and +0.73% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when ZEN moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ZEN's baseline. Nothing else.
Recent ZEN events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Zendesk to Acquire Local Measure, Expanding AI-Powered Voice | Press release | PR Newswire | — | — | |
| Zendesk 2025 CX Trends Report: Human-Centric AI Drives Loyalty | Press release | PR Newswire | — | — | |
| Zendesk Launches Flexible Pricing for Customized AI Journeys | Press release | PR Newswire | — | — | |
| Zendesk unveils the industry's most complete service solution for the AI era | Press release | PR Newswire | — | — | |
| AI ushers in era of intelligent CX, fuels massive industry transformation | Press release | PR Newswire | — | — | |
| Zendesk signs definitive agreement to acquire Klaus | Press release | PR Newswire | — | — | |
| Zendesk Appoints Kelly Grier to Board of Directors | Press release | PR Newswire | — | — |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ZEN section they belong to.
Where else ZEN is measured.
ZEN earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| RED HAT (RHT) | 2,000+ | +0.05% | 53% |
| Super Micro Computer, Inc. (SMCI) | 2,000+ | +0.15% | 54% |
| Micro Focus Intl PLC ADS each representing One Ord Sh (MFGP) | 1,949 | 0.00% | 48% |
| Nuance Communications, Inc. (NUAN) | 1,930 | +0.07% | 55% |
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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How the numbers are made.
How is Zendesk, Inc.'s median reaction calculated?
Every labeled ZEN 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 2,000+ 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. 53% of ZEN'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 ZEN'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.