Abpro Holdings, Inc (ABP)
How ABP actually reacts to news — the realized, point-in-time move the market made, measured across 93 labeled events over the last three years with zero look-ahead.
ABP’s median reaction, across the day.
Half of all Abpro Holdings, Inc news events land between -4.89% and +1.03% at 30 minutes.
Reaction stats as of 2026-08-13. Reaction = percent move vs. the price at the news timestamp.
Email me when ABP moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ABP’s baseline. Nothing else.
Get “How ABP reacts to news” as a PDF.
A free one-page summary: ABP’s median reaction to news and the full breakdown by event type — the numbers on this page, in one page.
Recent ABP events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K Abpro Holdings, Inc. For: May 28 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 10-Q Abpro Holdings, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | — | — | |
| Form NT 10-Q Abpro Holdings, Inc. For: Mar 31 | SEC filing · Form NT | SEC EDGAR | — | — | |
| Form 10-K/A Abpro Holdings, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | — | |
| Form 10-K Abpro Holdings, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | — | |
| Form NT 10-K Abpro Holdings, Inc. For: Dec 31 | SEC filing · Form NT | SEC EDGAR | — | — | |
| Form 8-K Abpro Holdings, Inc. For: Feb 18 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K Abpro Holdings, Inc. For: Feb 05 | SEC filing · Form 8-K | SEC EDGAR | +4.42% | -26.64% | |
| Form 8-K Abpro Holdings, Inc. For: Jan 28 | SEC filing · Form 8-K | SEC EDGAR | -5.70% | -3.63% | |
| Form 8-K Abpro Holdings, Inc. For: Jan 16 | SEC filing · Form 8-K | SEC EDGAR | +0.64% | -12.25% | |
| Abpro’s Lead Program ABP-102 Featured in Celltrion Presentation at the 44th Annual J.P. Morgan Healthcare Conference | Press release | GlobeNewswire | -0.52% | -6.81% | |
| Abpro and Celltrion, Inc. Announce U.S. FDA IND Clearance for Lead Multispecific Antibody Cancer Candidate ABP-102 / CT-P72 | Press release | GlobeNewswire | +0.94% | +13.85% | |
| Form 8-K Abpro Holdings, Inc. For: Jan 06 | SEC filing · Form 8-K | SEC EDGAR | +0.94% | +13.85% | |
| Abpro Holdings Announces Submission of an IND Application to Initiate a Phase 1 Clinical Trial of T cell engager ABP-102/CT-P72 for HER2-positive Cancers | Press release | GlobeNewswire | +0.00% | -4.63% | |
| Form 8-K Abpro Holdings, Inc. For: Dec 15 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -4.63% | |
| Abpro Granted Nasdaq Listing Extension to Pursue Compliance and Strategic Objectives | Press release | GlobeNewswire | +3.06% | +6.83% | |
| Form 8-K Abpro Holdings, Inc. For: Dec 09 | SEC filing · Form 8-K | SEC EDGAR | +3.06% | +6.83% | |
| Form EFFECT Abpro Holdings, Inc. | SEC filing · Form EFFECT | SEC EDGAR | +0.94% | -10.54% | |
| Form S-1/A Abpro Holdings, Inc. | SEC filing · Form S-1 | SEC EDGAR | — | +0.00% | |
| Form 10-Q Abpro Holdings, Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +6.96% | |
| Form S-1 Abpro Holdings, Inc. | SEC filing · Form S-1 | SEC EDGAR | +0.00% | +0.90% | |
| Abpro and Celltrion to Present Preclinical Data for CT-P72/ABP-102 at SITC 2025, Highlighting a Next-Generation HER2×CD3 T-Cell Engager | Press release | GlobeNewswire | -7.95% | -14.86% | |
| Form 8-K Abpro Holdings, Inc. For: Nov 04 | SEC filing · Form 8-K | SEC EDGAR | -7.95% | -14.86% | |
| Form 8-K/A Abpro Holdings, Inc. For: Nov 04 | SEC filing · Form 8-K | SEC EDGAR | +0.53% | -6.98% | |
| Abpro Announces 1-for-30 Reverse Stock Split Effective November 3, 2025 | Press release | GlobeNewswire | -2.64% | +4.77% | |
| Form 8-K Abpro Holdings, Inc. For: Nov 03 | SEC filing · Form 8-K | SEC EDGAR | -2.64% | +4.77% | |
| Form 8-K Abpro Holdings, Inc. For: Oct 16 | SEC filing · Form 8-K | SEC EDGAR | +1.13% | +2.62% | |
| Form 8-K Abpro Holdings, Inc. For: Oct 14 | SEC filing · Form 8-K | SEC EDGAR | +3.76% | +19.68% | |
| Form 8-K Abpro Holdings, Inc. For: Oct 10 | SEC filing · Form 8-K | SEC EDGAR | -0.86% | +9.20% | |
| Form DEFA14A Abpro Holdings, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +3.33% | +2.02% | |
| Form 8-K Abpro Holdings, Inc. For: Sep 30 | SEC filing · Form 8-K | SEC EDGAR | +0.42% | +2.76% | |
| Form 8-K Abpro Holdings, Inc. For: Sep 30 | SEC filing · Form 8-K | SEC EDGAR | -2.49% | -4.71% | |
| Form DEFA14A Abpro Holdings, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -0.15% | +21.39% | |
| Form DEFA14A Abpro Holdings, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.60% | +5.46% | |
| Form DEF 14A Abpro Holdings, Inc. For: Sep 18 | SEC filing · Form DEF | SEC EDGAR | -0.49% | -16.44% | |
| Form PRE 14A Abpro Holdings, Inc. For: Aug 29 | SEC filing · Form PRE | SEC EDGAR | +1.75% | +5.04% | |
| Form 10-Q Abpro Holdings, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.92% | -1.95% | |
| Form 8-K Abpro Holdings, Inc. For: Jul 20 | SEC filing · Form 8-K | SEC EDGAR | +1.92% | -0.88% | |
| Form S-8 Abpro Holdings, Inc. | SEC filing · Form S-8 | SEC EDGAR | -2.87% | -0.14% | |
| Form 8-K Abpro Holdings, Inc. For: Jun 17 | SEC filing · Form 8-K | SEC EDGAR | -2.92% | -6.07% | |
| Form EFFECT Abpro Holdings, Inc. | SEC filing · Form EFFECT | SEC EDGAR | -6.98% | +0.00% | |
| Form S-1/A Abpro Holdings, Inc. | SEC filing · Form S-1 | SEC EDGAR | +2.57% | +17.83% | |
| Form S-1 Abpro Holdings, Inc. | SEC filing · Form S-1 | SEC EDGAR | +0.37% | -6.20% | |
| Form 10-Q Abpro Holdings, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -3.74% | -14.81% | |
| Form EFFECT Abpro Holdings, Inc. | SEC filing · Form EFFECT | SEC EDGAR | -1.55% | -3.84% | |
| Form POS AM Abpro Holdings, Inc. | SEC filing · Form POS | SEC EDGAR | +0.00% | -4.56% | |
| Form ARS Abpro Holdings, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -11.00% | -4.48% | |
| Form DEF 14A Abpro Holdings, Inc. For: May 20 | SEC filing · Form DEF | SEC EDGAR | -11.00% | -4.48% | |
| Form 8-K Abpro Holdings, Inc. For: Apr 27 | SEC filing · Form 8-K | SEC EDGAR | -11.07% | -10.10% | |
| Abpro and Celltrion Unveil Preclinical Data for ABP-102/CT-P72 at AACR 2025, Showcasing Potential Best-in-Class HER2 x CD3 T-Cell Engager | Press release | GlobeNewswire | -11.07% | -10.10% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ABP section they belong to.
More of the dataset.
ABP earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Abpro Holdings, Inc's median reaction calculated?
Every labeled ABP 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 93 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. 37% of ABP'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 ABP'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.