Passage Bio, Inc. (PASG)
PASG moved a median of 0.00% 30 minutes after news, and +0.22% by the close. How PASG actually reacts to news — the realized, point-in-time move the market made, measured across 200 labeled events over the last three years with zero look-ahead.
PASG’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 35% | 187 |
| 30-min | 0.00% | 44% | 197 |
| 60-min | -0.63% | 40% | 200 |
| to close | +0.22% | 51% | 195 |
| Middle 50% of PASG reactions | -2.83% to +1.43% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 200 |
Half of all Passage Bio, Inc. news events land between -2.83% and +1.43% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How PASG reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades | 14 | -1.41% | 43% | -3.13% |
| Coverage initiations | 11 | +3.11% | 64% | +5.94% |
| Rating reiterations | 22 | +0.50% | 55% | +0.66% |
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 PASG ranks against every other measured name →
That’s how PASG usually reacts — get an email when it moves on news →Email me when PASG moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to PASG's baseline. Nothing else.
Recent PASG events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form EFFECT Passage BIO, Inc. | SEC filing · Form EFFECT | SEC EDGAR | -2.47% | -18.39% | |
| Form S-4/A Passage BIO, Inc. | SEC filing · Form S-4 | SEC EDGAR | — | -1.60% | |
| Form S-4/A Passage BIO, Inc. | SEC filing · Form S-4 | SEC EDGAR | — | -0.24% | |
| Form S-4/A Passage BIO, Inc. | SEC filing · Form S-4 | SEC EDGAR | +1.18% | +2.48% | |
| Form 8-K Passage BIO, Inc. For: Sep 02 | SEC filing · Form 8-K | SEC EDGAR | — | +2.81% | |
| Form S-4/A Passage BIO, Inc. | SEC filing · Form S-4 | SEC EDGAR | — | +2.81% | |
| Form 10-Q Passage BIO, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.69% | — | |
| Form S-4 Passage BIO, Inc. | SEC filing · Form S-4 | SEC EDGAR | — | +1.03% | |
| Form 8-K Passage BIO, Inc. For: Jun 23 | SEC filing · Form 8-K | SEC EDGAR | -3.41% | -13.23% | |
| Passage Bio and Remix Therapeutics Announce Merger Agreement | Press release | GlobeNewswire | -3.41% | -13.23% | |
| Form 8-K Passage BIO, Inc. For: May 21 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +4.01% | |
| Form 8-K Passage BIO, Inc. For: May 19 | SEC filing · Form 8-K | SEC EDGAR | -0.76% | +5.51% | |
| Form 10-Q Passage BIO, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +4.84% | +15.90% | |
| Form 8-K Passage BIO, Inc. For: Apr 28 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +2.30% | |
| Form 8-K Passage BIO, Inc. For: Apr 20 | SEC filing · Form 8-K | SEC EDGAR | -0.33% | -30.86% | |
| Passage Bio Reports Updated Interim Data from upliFT-D Trial and Provides Regulatory and Corporate Updates | Press release | GlobeNewswire | -0.33% | -30.86% | |
| Form ARS Passage BIO, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | — | +8.32% | |
| Form DEF 14A Passage BIO, Inc. For: May 19 | SEC filing · Form DEF | SEC EDGAR | — | +8.32% | |
| Form DEFA14A Passage BIO, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | — | +8.32% | |
| Form 8-K Passage BIO, Inc. For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | — | -2.52% | |
| Form S-8 Passage BIO, Inc. | SEC filing · Form S-8 | SEC EDGAR | +0.00% | — | |
| Form 10-K Passage BIO, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | -4.99% | |
| Form 8-K Passage BIO, Inc. For: Mar 03 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -4.99% | |
| Passage Bio Reports Fourth Quarter and Full Year 2025 Financial Results and Provides Recent Business Highlights | Press release | GlobeNewswire | +0.00% | -4.99% | |
| Passage Bio to Participate in Upcoming Investor Conferences | Press release | GlobeNewswire | — | +0.22% | |
| Form 8-K Passage BIO, Inc. For: Jan 12 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -10.23% | |
| Form 10-Q Passage BIO, Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.16% | +20.13% | |
| Form 8-K Passage BIO, Inc. For: Nov 10 | SEC filing · Form 8-K | SEC EDGAR | -0.16% | +20.13% | |
| Passage Bio Reports Third Quarter 2025 Financial Results and Provides Recent Business Highlights | Press release | GlobeNewswire | -0.16% | +20.13% | |
| Passage Bio to Present at Guggenheim Securities 2nd Annual Healthcare Innovation Conference | Press release | GlobeNewswire | +0.90% | +0.90% | |
| Passage Bio to Participate in Chardan’s 9th Annual Genetic Medicines Conference | Press release | GlobeNewswire | +0.00% | +0.02% | |
| Form 8-K Passage BIO, Inc. For: Sep 16 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -6.28% | |
| Passage Bio to Participate in H.C. Wainwright 27th Annual Global Investment Conference | Press release | GlobeNewswire | — | -2.27% | |
| Form 10-Q Passage BIO, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -2.65% | — | |
| Form 8-K Passage BIO, Inc. For: Aug 12 | SEC filing · Form 8-K | SEC EDGAR | -2.65% | — | |
| Passage Bio Reports Second Quarter 2025 Financial Results and Provides Recent Business Highlights | Press release | GlobeNewswire | -2.65% | — | |
| Form 8-K Passage BIO, Inc. For: Jul 28 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.44% | |
| Form 8-K Passage BIO, Inc. For: Jul 10 | SEC filing · Form 8-K | SEC EDGAR | -4.73% | -11.01% | |
| Passage Bio Announces 1-for-20 Reverse Stock Split | Press release | GlobeNewswire | +0.66% | +4.61% | |
| Form 8-K Passage BIO, Inc. For: Jun 23 | SEC filing · Form 8-K | SEC EDGAR | +5.25% | -9.88% | |
| Passage Bio Reports Updated Interim Data from upliFT-D Study and Provides Program Update | Press release | GlobeNewswire | +5.25% | -9.88% | |
| Form 8-K Passage BIO, Inc. For: May 28 | SEC filing · Form 8-K | SEC EDGAR | -4.16% | +1.44% | |
| Form 10-Q Passage BIO, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -2.54% | -8.64% | |
| Form 8-K Passage BIO, Inc. For: May 13 | SEC filing · Form 8-K | SEC EDGAR | -2.54% | -8.64% | |
| Passage Bio Reports First Quarter 2025 Financial Results and Provides Recent Business Highlights | Press release | GlobeNewswire | -2.54% | -8.64% | |
| Form ARS Passage BIO, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.03% | -9.24% | |
| Form DEF 14A Passage BIO, Inc. For: May 28 | SEC filing · Form DEF | SEC EDGAR | +0.03% | -9.24% | |
| Form DEFA14A Passage BIO, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.03% | -9.24% | |
| Form PRE 14A Passage BIO, Inc. For: May 28 | SEC filing · Form PRE | SEC EDGAR | +0.00% | -5.56% | |
| Form S-8 Passage BIO, Inc. | SEC filing · Form S-8 | SEC EDGAR | +3.32% | +4.72% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the PASG section they belong to.
Where else PASG is measured.
PASG earnings → · Analyst actions → · SEC filings →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Passage Bio, Inc.'s median reaction calculated?
Every labeled PASG 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 200 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. 44% of PASG'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 PASG'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.