AC Immune SA (ACIU)
How ACIU actually reacts to news — the realized, point-in-time move the market made, measured across 196 labeled events over the last three years with zero look-ahead.
ACIU’s median reaction, across the day.
Half of all AC Immune SA news events land between -1.93% and +1.74% at 30 minutes.
Reaction stats as of 2026-08-13. Reaction = percent move vs. the price at the news timestamp.
Email me when ACIU moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ACIU’s baseline. Nothing else.
Get “How ACIU reacts to news” as a PDF.
A free one-page summary: ACIU’s median reaction to news and the full breakdown by event type — the numbers on this page, in one page.
Recent ACIU events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 6-K AC Immune SA For: Aug 11 | SEC filing · Form 6-K | SEC EDGAR | -1.26% | +6.72% | |
| Form 6-K AC Immune SA For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | +0.28% | +0.44% | |
| Form 6-K AC Immune SA For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | -3.14% | -4.80% | |
| Form 6-K AC Immune SA For: Jun 11 | SEC filing · Form 6-K | SEC EDGAR | -1.39% | +4.63% | |
| AC Immune Presents New Phase 1 Data Indicating Higher Uptake of TDP-43 PET Tracer ACI-19626 in Patients with ALS | Press release | GlobeNewswire | +0.00% | -1.39% | |
| Form 6-K AC Immune SA For: May 15 | SEC filing · Form 6-K | SEC EDGAR | -2.11% | -1.76% | |
| Form 6-K AC Immune SA For: May 12 | SEC filing · Form 6-K | SEC EDGAR | -1.41% | -2.46% | |
| Form 6-K AC Immune SA For: Apr 30 | SEC filing · Form 6-K | SEC EDGAR | +0.98% | -0.66% | |
| AC Immune Announces Amendment to Morphomer ® Tau License and Collaboration Agreement with Lilly | Press release | GlobeNewswire | +0.34% | +7.24% | |
| Form 6-K AC Immune SA For: Apr 02 | SEC filing · Form 6-K | SEC EDGAR | +1.91% | +8.17% | |
| Form 20-F AC Immune SA For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | +0.00% | +1.86% | |
| Form 6-K AC Immune SA For: Mar 13 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +1.86% | |
| Form 6-K AC Immune SA For: Feb 24 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +6.67% | |
| Form 6-K AC Immune SA For: Feb 17 | SEC filing · Form 6-K | SEC EDGAR | -4.44% | -2.96% | |
| Form 6-K AC Immune SA For: Dec 11 | SEC filing · Form 6-K | SEC EDGAR | -12.62% | +1.58% | |
| Form 6-K AC Immune SA For: Nov 04 | SEC filing · Form 6-K | SEC EDGAR | +3.49% | +4.76% | |
| AC Immune Sharpens Pipeline Focus with Operational Efficiencies Extending Cash Runway | Press release | GlobeNewswire | +0.00% | -5.29% | |
| Form 6-K AC Immune SA For: Sep 04 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -5.29% | |
| Form 6-K AC Immune SA For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | +0.46% | +11.87% | |
| Form 6-K AC Immune SA For: Jun 20 | SEC filing · Form 6-K | SEC EDGAR | +1.02% | -4.08% | |
| Form 6-K AC Immune SA For: Jun 11 | SEC filing · Form 6-K | SEC EDGAR | +0.96% | -0.96% | |
| Form 6-K AC Immune SA For: May 19 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +2.35% | |
| Form 6-K AC Immune SA For: Apr 30 | SEC filing · Form 6-K | SEC EDGAR | +1.76% | +1.76% | |
| Form 20-F AC Immune SA For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | -4.25% | -2.13% | |
| Form 6-K AC Immune SA For: Mar 13 | SEC filing · Form 6-K | SEC EDGAR | -4.25% | -2.13% | |
| AC Immune to Participate in Upcoming Investor Conferences | Press release | GlobeNewswire | -0.42% | -0.42% | |
| Form 6-K AC Immune SA For: Dec 18 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -3.92% | |
| Form 6-K AC Immune SA For: Dec 10 | SEC filing · Form 6-K | SEC EDGAR | +2.19% | +0.00% | |
| Form 6-K AC Immune SA For: Nov 14 | SEC filing · Form 6-K | SEC EDGAR | +1.82% | +7.58% | |
| AC Immune to Present at the Jefferies 2024 London Healthcare Conference | Press release | GlobeNewswire | +0.66% | +2.96% | |
| Form 6-K AC Immune SA For: Nov 05 | SEC filing · Form 6-K | SEC EDGAR | +1.30% | +5.20% | |
| Form 6-K AC Immune SA For: Sep 19 | SEC filing · Form 6-K | SEC EDGAR | -0.39% | -0.27% | |
| Form 6-K AC Immune SA For: Sep 17 | SEC filing · Form 6-K | SEC EDGAR | -3.71% | -1.14% | |
| Form 6-K AC Immune SA For: Aug 28 | SEC filing · Form 6-K | SEC EDGAR | -1.62% | +1.62% | |
| AC Immune Reports Second Quarter 2024 Financial Results and Provides a Corporate Update | Press release | GlobeNewswire | +3.98% | +0.28% | |
| Form 6-K AC Immune SA For: Aug 06 | SEC filing · Form 6-K | SEC EDGAR | +2.62% | -2.91% | |
| Form 6-K AC Immune SA For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | +3.98% | +0.28% | |
| Form EFFECT AC Immune SA | SEC filing · Form EFFECT | SEC EDGAR | -0.98% | -6.60% | |
| AC Immune Unveils Novel Therapeutic Antibody Drug Conjugate (ADC) Technology for Improved Efficacy in Neurodegenerative Diseases at AAIC 2024 | Press release | GlobeNewswire | -2.06% | -3.08% | |
| Form 6-K AC Immune SA For: Jul 31 | SEC filing · Form 6-K | SEC EDGAR | -2.06% | -3.08% | |
| Form F-3/A AC Immune SA | SEC filing · Form F-3 | SEC EDGAR | -0.25% | +1.25% | |
| Form 6-K AC Immune SA For: Jul 25 | SEC filing · Form 6-K | SEC EDGAR | -2.17% | +6.25% | |
| AC Immune Showcasing its Novel Morphomer-Antibody Drug Conjugate (morADC) Platform for the Treatment of Neurodegenerative Diseases at AAIC 2024 | Press release | GlobeNewswire | +1.20% | +3.19% | |
| Form 6-K AC Immune SA For: Jun 20 | SEC filing · Form 6-K | SEC EDGAR | +0.60% | -0.25% | |
| Form 6-K AC Immune SA For: May 21 | SEC filing · Form 6-K | SEC EDGAR | -0.16% | +4.70% | |
| AC Immune Reports First Quarter 2024 Financial Results and Provides a Corporate Update | Press release | GlobeNewswire | -4.02% | -1.79% | |
| Form 6-K AC Immune SA For: May 13 | SEC filing · Form 6-K | SEC EDGAR | -4.02% | -1.79% | |
| Form 20-F AC Immune SA For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | -1.86% | -11.67% | |
| Form 6-K AC Immune SA For: Mar 14 | SEC filing · Form 6-K | SEC EDGAR | -1.86% | -11.67% | |
| Form F-3 AC Immune SA | SEC filing · Form F-3 | SEC EDGAR | +3.03% | +6.06% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ACIU section they belong to.
More of the dataset.
ACIU earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is AC Immune SA's median reaction calculated?
Every labeled ACIU 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 196 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. 42% of ACIU'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 2026-08-13.
Does ACIU'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.