iTeos Therapeutics, Inc. (ITOS)
ITOS moved a median of +0.10% 30 minutes after news, and -0.15% by the close. How ITOS actually reacts to news — the realized, point-in-time move the market made, measured across 214 labeled events over the last three years with zero look-ahead.
ITOS’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 45% | 190 |
| 30-min | +0.10% | 55% | 190 |
| 60-min | +0.31% | 61% | 190 |
| to close | -0.15% | 45% | 189 |
| Middle 50% of ITOS reactions | -0.72% to +1.05% |
|---|---|
| Median reaction (30-min) | +0.10% |
| Measured reactions | 214 |
Half of all iTeos Therapeutics, Inc. news events land between -0.72% and +1.05% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How ITOS reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades | 18 | -0.29% | 39% | -2.02% |
| Rating reiterations | 38 | -0.69% | 29% | -1.32% |
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 ITOS ranks against every other measured name →
That’s how ITOS usually reacts — get an email when it moves on news →Email me when ITOS moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ITOS's baseline. Nothing else.
Recent ITOS events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Muna Therapeutics Announces CEO Transition as Clinical Pipeline Advances | Press release | PR Newswire | — | — | |
| Form 15-12G iTeos Therapeutics, Inc. | SEC filing · Form 15-12G | SEC EDGAR | — | — | |
| Form EFFECT iTeos Therapeutics, Inc. | SEC filing · Form EFFECT | SEC EDGAR | — | — | |
| Form 8-K iTeos Therapeutics, Inc. For: Aug 29 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form POS AM iTeos Therapeutics, Inc. | SEC filing · Form POS | SEC EDGAR | — | — | |
| Form S-8 POS iTeos Therapeutics, Inc. | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Form 10-Q iTeos Therapeutics, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.15% | +0.20% | |
| BRODSKY & SMITH SHAREHOLDER UPDATE: Notifying Investors of the Following Investigations: iTeos Therapeutics, Inc. (Nasdaq - ITOS), ZimVie Inc. (Nasdaq - ZIMV), PharmChem, Inc. (OTC - PCHM), NV5 Global, Inc. (Nasdaq - NVEE) | Press release | GlobeNewswire | +0.00% | -0.25% | |
| ALERT: Rowley Law PLLC is Investigating Proposed Acquisition of iTeos Therapeutics, Inc. | Press release | PR Newswire | +0.20% | -0.39% | |
| Form 8-K iTeos Therapeutics, Inc. For: Jul 18 | SEC filing · Form 8-K | SEC EDGAR | -0.14% | -2.03% | |
| iTeos Therapeutics Enters into Agreement to Be Acquired by Concentra Biosciences for $10.047 in Cash per Share Plus a Contingent Value Right | Press release | GlobeNewswire | -0.14% | -2.03% | |
| ITOS Stock Alert: Halper Sadeh LLC Is Investigating Whether the Sale of iTeos Therapeutics, Inc. Is Fair to Shareholders | Press release | Business Wire | +0.17% | -2.10% | |
| Form 8-K iTeos Therapeutics, Inc. For: Jun 17 | SEC filing · Form 8-K | SEC EDGAR | +0.10% | -0.20% | |
| Form 8-K iTeos Therapeutics, Inc. For: Jun 01 | SEC filing · Form 8-K | SEC EDGAR | +0.39% | -0.20% | |
| Form DEFA14A iTeos Therapeutics, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.39% | -0.20% | |
| Form 8-K iTeos Therapeutics, Inc. For: May 27 | SEC filing · Form 8-K | SEC EDGAR | +4.40% | -5.54% | |
| iTeos Therapeutics Announces Its Intention to Wind Down Operations | Press release | GlobeNewswire | +4.40% | -5.54% | |
| Form 8-K iTeos Therapeutics, Inc. For: May 13 | SEC filing · Form 8-K | SEC EDGAR | -2.83% | -7.54% | |
| Form 10-Q iTeos Therapeutics, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.55% | -5.39% | |
| Form ARS iTeos Therapeutics, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.28% | +6.12% | |
| Form DEF 14A iTeos Therapeutics, Inc. For: Jun 17 | SEC filing · Form DEF | SEC EDGAR | +0.28% | +6.12% | |
| Form DEFA14A iTeos Therapeutics, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.28% | +6.12% | |
| Form 10-K iTeos Therapeutics, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +1.46% | +6.14% | |
| Form S-8 iTeos Therapeutics, Inc. | SEC filing · Form S-8 | SEC EDGAR | +1.46% | +6.14% | |
| Form 8-K iTeos Therapeutics, Inc. For: Jan 13 | SEC filing · Form 8-K | SEC EDGAR | -0.45% | +0.91% | |
| Form 10-Q iTeos Therapeutics, Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -3.53% | -4.57% | |
| Form 8-K iTeos Therapeutics, Inc. For: Oct 31 | SEC filing · Form 8-K | SEC EDGAR | -0.60% | +2.40% | |
| Form 8-K iTeos Therapeutics, Inc. For: Sep 14 | SEC filing · Form 8-K | SEC EDGAR | -3.77% | -15.44% | |
| Form 10-Q iTeos Therapeutics, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -1.55% | -3.45% | |
| iTeos Therapeutics Announces Appointment of David Feltquate as Chief Medical Officer | Press release | GlobeNewswire | +1.80% | +5.13% | |
| Form 8-K iTeos Therapeutics, Inc. For: Jun 11 | SEC filing · Form 8-K | SEC EDGAR | +0.43% | +0.62% | |
| Form 8-K iTeos Therapeutics, Inc. For: May 10 | SEC filing · Form 8-K | SEC EDGAR | -1.06% | -2.07% | |
| Form 10-Q iTeos Therapeutics, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.79% | +4.12% | |
| iTeos Reports First Quarter 2024 Financial Results and Provides Business Updates | Press release | GlobeNewswire | +0.79% | +4.12% | |
| Form ARS iTeos Therapeutics, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -1.72% | +1.15% | |
| Form DEF 14A iTeos Therapeutics, Inc. For: Jun 11 | SEC filing · Form DEF | SEC EDGAR | -1.72% | +1.15% | |
| Form DEFA14A iTeos Therapeutics, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -1.72% | +1.15% | |
| Form 10-K iTeos Therapeutics, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | +5.69% | |
| Form S-8 iTeos Therapeutics, Inc. | SEC filing · Form S-8 | SEC EDGAR | +0.00% | +5.69% | |
| Form 8-K iTeos Therapeutics, Inc. For: Jan 10 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +1.12% | |
| Form 8-K iTeos Therapeutics, Inc. For: Dec 05 | SEC filing · Form 8-K | SEC EDGAR | -2.42% | -0.61% | |
| Form 10-Q iTeos Therapeutics, Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +4.31% | +3.20% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ITOS section they belong to.
Where else ITOS is measured.
ITOS earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is iTeos Therapeutics, Inc.'s median reaction calculated?
Every labeled ITOS 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 214 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 ITOS'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 ITOS'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.