West Pharmaceutical Services, Inc. (WST)
WST moved a median of -0.05% 30 minutes after news, and +0.03% by the close. How WST actually reacts to news — the realized, point-in-time move the market made, measured across 847 labeled events over the last three years with zero look-ahead.
WST’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.03% | 47% | 843 |
| 30-min | -0.05% | 45% | 844 |
| 60-min | +0.04% | 51% | 844 |
| to close | +0.03% | 51% | 845 |
| Middle 50% of WST reactions | -0.48% to +0.28% |
|---|---|
| Median reaction (30-min) | -0.05% |
| Measured reactions | 847 |
Half of all West Pharmaceutical Services, Inc. news events land between -0.48% and +0.28% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How WST reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 26 | +0.68% | 77% | +1.21% |
| Coverage initiations | 28 | -0.08% | 36% | +0.19% |
| Rating reiterations | 41 | +0.11% | 56% | -0.55% |
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. 3 further classes were observed with fewer than 10 measured events and are not published. See how WST ranks against every other measured name →
That’s how WST usually reacts — get an email when it moves on news →Email me when WST moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to WST's baseline. Nothing else.
Recent WST events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| West to Host Third-Quarter 2026 Conference Call | Press release | PR Newswire | -0.04% | -0.65% | |
| West to Highlight Industry Leadership in Packaging and Containment at CPHI Worldwide | Press release | PR Newswire | -0.14% | +3.35% | |
| West to Participate in Upcoming Investor Conferences | Press release | PR Newswire | +0.59% | -1.12% | |
| Form 10-Q WEST PHARMACEUTICAL SERV For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -2.39% | -6.71% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Jul 23 | SEC filing · Form 8-K | SEC EDGAR | -5.03% | -7.67% | |
| West Reports Second-Quarter 2026 Results | Press release | PR Newswire | -5.03% | -7.67% | |
| West Declares Quarterly Dividend | Press release | PR Newswire | +0.11% | -0.59% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Jul 14 | SEC filing · Form 8-K | SEC EDGAR | +0.29% | +0.45% | |
| West to Host Second-Quarter 2026 Conference Call | Press release | PR Newswire | -0.75% | -1.22% | |
| West Completes Sale and Transfer of the Manufacturing and Supply Rights for SmartDose® 3.5mL On-Body Delivery System | Press release | PR Newswire | -0.36% | -0.09% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: May 31 | SEC filing · Form 8-K | SEC EDGAR | -0.87% | -0.64% | |
| West Appoints Michel Lagarde to be President and Chief Executive Officer | Press release | PR Newswire | -0.87% | -0.64% | |
| Form 8-K/A WEST PHARMACEUTICAL SERV For: May 07 | SEC filing · Form 8-K | SEC EDGAR | -1.09% | +2.58% | |
| Form SD WEST PHARMACEUTICAL SERV | SEC filing · Form SD | SEC EDGAR | +0.68% | -0.50% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: May 07 | SEC filing · Form 8-K | SEC EDGAR | -1.99% | +1.55% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: May 04 | SEC filing · Form 8-K | SEC EDGAR | +0.07% | +0.40% | |
| West to Participate in Upcoming Investor Conferences | Press release | PR Newswire | -0.73% | -3.24% | |
| Form 10-Q WEST PHARMACEUTICAL SERV For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -1.04% | -3.11% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Apr 23 | SEC filing · Form 8-K | SEC EDGAR | -0.23% | -1.37% | |
| West Reports First-Quarter 2026 Results | Press release | PR Newswire | -0.23% | -1.37% | |
| West to Host First-Quarter 2026 Conference Call | Press release | PR Newswire | +0.05% | -2.21% | |
| West Expands Dublin Facility to Support High-Volume Injectable Therapies, Including Diabetes and Obesity | Press release | PR Newswire | +0.07% | +1.18% | |
| Form DEF 14A WEST PHARMACEUTICAL SERV For: May 04 | SEC filing · Form DEF | SEC EDGAR | +0.21% | -2.60% | |
| Form DEFA14A WEST PHARMACEUTICAL SERV | SEC filing · Form DEFA14A | SEC EDGAR | +0.21% | -2.60% | |
| Eric M. Green Informs Board of Plans to Retire as President, CEO and Chair of the Board of West Pharmaceutical Services, Inc. | Press release | PR Newswire | -3.97% | -2.71% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Mar 09 | SEC filing · Form 8-K | SEC EDGAR | -3.97% | -2.71% | |
| West to Participate in Upcoming Investor Conferences | Press release | PR Newswire | +1.00% | +2.61% | |
| Form 10-K WEST PHARMACEUTICAL SERV For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.30% | +0.69% | |
| West Announces Quarterly Dividend and Share Repurchase Program | Press release | PR Newswire | -0.30% | +0.69% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Feb 12 | SEC filing · Form 8-K | SEC EDGAR | -2.41% | -3.13% | |
| West Reports Fourth-Quarter and Full-Year 2025 Results | Press release | PR Newswire | -2.41% | -3.13% | |
| PDA Introduces the 2026 Board of Directors and Officers | Press release | PR Web | -0.03% | +0.47% | |
| West to Host Fourth-Quarter and Full-Year 2025 Conference Call | Press release | PR Newswire | -1.04% | -0.76% | |
| West Synchrony™ S1 Prefillable Syringe System Commercially Available at Pharmapack | Press release | PR Newswire | -0.71% | -1.76% | |
| West Signs Agreement to Sell the Manufacturing and Supply Rights for SmartDose® 3.5mL On-Body Delivery System to AbbVie | Press release | PR Newswire | -1.41% | -2.14% | |
| West to Participate in Upcoming Investor Conference | Press release | PR Newswire | -0.93% | -1.73% | |
| West Declares Quarterly Dividend | Press release | PR Newswire | -0.67% | -0.19% | |
| West Synchrony™ Prefillable Syringe System Launches at CPHI: Redefining a system-level solution for drug delivery | Press release | PR Newswire | -0.80% | -4.26% | |
| West to Participate in Upcoming Investor Conferences | Press release | PR Newswire | +0.06% | -3.40% | |
| Form 10-Q WEST PHARMACEUTICAL SERV For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.06% | -3.40% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Oct 23 | SEC filing · Form 8-K | SEC EDGAR | +7.16% | +2.42% | |
| West Reports Third-Quarter 2025 Results | Press release | PR Newswire | +7.16% | +2.42% | |
| West to Host Third-Quarter 2025 Conference Call | Press release | PR Newswire | -0.22% | -1.56% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Sep 11 | SEC filing · Form 8-K | SEC EDGAR | +0.59% | -2.84% | |
| West to Participate in Upcoming Investor Conferences in September 2025 | Press release | PR Newswire | -0.12% | -0.98% | |
| Form S-8 WEST PHARMACEUTICAL SERV | SEC filing · Form S-8 | SEC EDGAR | -0.12% | -0.98% | |
| Form 10-Q WEST PHARMACEUTICAL SERV For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.81% | -5.59% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Jul 24 | SEC filing · Form 8-K | SEC EDGAR | +0.64% | -1.13% | |
| West Announces Second-Quarter 2025 Results and Fourth-Quarter 2025 Dividend, Updates Full-Year 2025 Guidance | Press release | PR Newswire | +0.64% | -1.13% | |
| Form 8-K WEST PHARMACEUTICAL SERV For: Jul 21 | SEC filing · Form 8-K | SEC EDGAR | +1.75% | +3.50% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the WST section they belong to.
Where else WST is measured.
WST earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Guardant Health, Inc. (GH) | 848 | -0.17% | 47% |
| Capital Senior Living Corporation (CSU) | 847 | 0.00% | 50% |
| Adamas Pharmaceuticals, Inc. (ADMS) | 846 | -0.16% | 44% |
| Defiance Daily Target 2x Long LMND ETF (LMNX) | 844 | +0.07% | 54% |
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 Healthcare names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is West Pharmaceutical Services, Inc.'s median reaction calculated?
Every labeled WST 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 847 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. 45% of WST'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 WST'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.