Assertio Holdings, Inc. (ASRT)
ASRT moved a median of -0.02% 30 minutes after news, and +0.04% by the close. How ASRT actually reacts to news — the realized, point-in-time move the market made, measured across 833 labeled events over the last three years with zero look-ahead.
ASRT’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 40% | 785 |
| 30-min | -0.02% | 46% | 793 |
| 60-min | 0.00% | 49% | 793 |
| to close | +0.04% | 50% | 788 |
| Middle 50% of ASRT reactions | -0.93% to +1.17% |
|---|---|
| Median reaction (30-min) | -0.02% |
| Measured reactions | 833 |
Half of all Assertio Holdings, Inc. news events land between -0.93% and +1.17% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How ASRT reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades | 16 | 0.00% | 25% | -0.13% |
| Rating reiterations | 21 | +1.31% | 71% | +0.45% |
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 ASRT ranks against every other measured name →
That’s how ASRT usually reacts — get an email when it moves on news →Email me when ASRT moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ASRT's baseline. Nothing else.
Recent ASRT events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 15-12G Assertio Holdings, Inc. | SEC filing · Form 15-12G | SEC EDGAR | — | — | |
| Form EFFECT Assertio Holdings, Inc. | SEC filing · Form EFFECT | SEC EDGAR | — | — | |
| Assertio Announces Completion of Merger with Zydus Lifesciences and Fundamental Change and Make-Whole Fundamental Change Relating to its Outstanding 6.50% Convertible Senior Notes due 2027 | Press release | Business Wire | — | — | |
| Form 8-K Assertio Holdings, Inc. For: Jun 16 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form POS AM Assertio Holdings, Inc. | SEC filing · Form POS | SEC EDGAR | — | — | |
| Form S-8 POS Assertio Holdings, Inc. | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Are SUNE, RLYB, ASRT, TMHC Obtaining Fair Deals for their Shareholders? | Press release | PR Newswire | +0.06% | +0.09% | |
| Are SILA, UNF, ASRT, KW Obtaining Fair Deals for their Shareholders? | Press release | PR Newswire | +0.00% | +0.09% | |
| Are SEM, UNF, CNTA, ASRT Obtaining Fair Deals for their Shareholders? | Press release | PR Newswire | +0.00% | +0.04% | |
| Form 8-K Assertio Holdings, Inc. For: May 18 | SEC filing · Form 8-K | SEC EDGAR | +0.09% | +0.00% | |
| Assertio to Be Acquired by Zydus Worldwide DMCC for $23.50 Per Share in Cash | Press release | Business Wire | +0.00% | +0.00% | |
| Form 8-K Assertio Holdings, Inc. For: May 13 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.00% | |
| Assertio and Garda Mutually Agree to Delay Launch of Tender Offer | Press release | Business Wire | +0.00% | +0.45% | |
| Form 10-Q Assertio Holdings, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +1.68% | +1.22% | |
| Form 8-K Assertio Holdings, Inc. For: May 07 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.45% | |
| Form 8-K Assertio Holdings, Inc. For: May 05 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.45% | |
| Assertio and Garda Mutually Agree to Postpone Commencement of Tender Offer | Press release | Business Wire | +0.09% | +1.42% | |
| Form 8-K Assertio Holdings, Inc. For: May 04 | SEC filing · Form 8-K | SEC EDGAR | +0.09% | +1.42% | |
| Assertio Announces Amended and Restated Merger Agreement with Garda Therapeutics | Press release | Business Wire | -0.04% | -0.28% | |
| Form 8-K Assertio Holdings, Inc. For: May 01 | SEC filing · Form 8-K | SEC EDGAR | -0.04% | -0.28% | |
| Assertio and Garda Mutually Agree to Extend Tender Offer Deadline | Press release | Business Wire | +0.06% | +1.54% | |
| Form 8-K Assertio Holdings, Inc. For: Apr 29 | SEC filing · Form 8-K | SEC EDGAR | +0.06% | +1.54% | |
| Assertio Provides Update on Garda Therapeutics Tender Process | Press release | Business Wire | -0.55% | -0.55% | |
| Form 8-K Assertio Holdings, Inc. For: Apr 21 | SEC filing · Form 8-K | SEC EDGAR | -0.55% | -0.55% | |
| Are AVNS, LEG, ASRT Obtaining Fair Deals for their Shareholders? | Press release | PR Newswire | +0.03% | +0.00% | |
| ASRT Stock Alert: Halper Sadeh LLC is Investigating Whether Assertio Holdings, Inc. is Obtaining a Fair Price for its Shareholders | Press release | GlobeNewswire | +0.00% | +0.00% | |
| Form 8-K Assertio Holdings, Inc. For: Apr 08 | SEC filing · Form 8-K | SEC EDGAR | +0.06% | -0.06% | |
| ASRT Stock Alert: Halper Sadeh LLC is Investigating Whether Assertio Holdings, Inc. is Obtaining a Fair Price for its Shareholders | Press release | Business Wire | +0.07% | -0.06% | |
| Form 8-K Assertio Holdings, Inc. For: Apr 08 | SEC filing · Form 8-K | SEC EDGAR | +0.28% | -0.17% | |
| Form 8-K/A Assertio Holdings, Inc. For: Apr 08 | SEC filing · Form 8-K | SEC EDGAR | +0.22% | +0.00% | |
| Assertio Announces Agreement to be Acquired by Garda Therapeutics | Press release | Business Wire | +0.28% | -0.17% | |
| Cosette Pharmaceuticals Expands Branded Portfolio through Acquisition of SYMPAZAN® and Additional Products from Assertio | Press release | Business Wire | +0.28% | -0.17% | |
| Form ARS Assertio Holdings, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | — | -2.16% | |
| Form DEF 14A Assertio Holdings, Inc. For: May 05 | SEC filing · Form DEF | SEC EDGAR | +1.99% | -2.67% | |
| Assertio Reports Fourth Quarter and Full Year 2025 Financial Results | Press release | Business Wire | -6.70% | +3.39% | |
| Form 10-K Assertio Holdings, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -6.70% | +3.39% | |
| Form 8-K Assertio Holdings, Inc. For: Mar 16 | SEC filing · Form 8-K | SEC EDGAR | -6.70% | +3.39% | |
| Assertio Holdings, Inc. to Report Fourth Quarter and Full Year 2025 Financial Results on March 16, 2026 | Press release | Business Wire | — | +0.92% | |
| Assertio Holdings, Inc. Regains Compliance With Nasdaq Listing Requirements | Press release | Business Wire | -0.16% | +10.42% | |
| Form 8-K Assertio Holdings, Inc. For: Jan 12 | SEC filing · Form 8-K | SEC EDGAR | -0.16% | +10.42% | |
| Assertio Announces Publication of Rolvedon® Same-Day Dosing Clinical Trial | Press release | Business Wire | -0.54% | -1.50% | |
| Assertio Holdings, Inc. Announces 1-for-15 Reverse Stock Split | Press release | Business Wire | -1.67% | +0.46% | |
| Form 8-K Assertio Holdings, Inc. For: Dec 19 | SEC filing · Form 8-K | SEC EDGAR | -1.67% | +0.46% | |
| Form 8-K Assertio Holdings, Inc. For: Nov 17 | SEC filing · Form 8-K | SEC EDGAR | -0.56% | -0.13% | |
| Assertio Reports Third Quarter 2025 Financial Results | Press release | Business Wire | +2.84% | +16.79% | |
| Form 10-Q Assertio Holdings, Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +2.84% | +16.79% | |
| Form 8-K Assertio Holdings, Inc. For: Nov 10 | SEC filing · Form 8-K | SEC EDGAR | +2.84% | +16.79% | |
| Form 8-K Assertio Holdings, Inc. For: Oct 27 | SEC filing · Form 8-K | SEC EDGAR | +2.41% | +0.57% | |
| Assertio Announces Leadership Transition | Press release | GlobeNewswire | +0.00% | +0.36% | |
| Form 8-K Assertio Holdings, Inc. For: Oct 07 | SEC filing · Form 8-K | SEC EDGAR | +0.06% | +6.33% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ASRT section they belong to.
Where else ASRT is measured.
ASRT earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Integra LifeSciences Holdings Corporation (IART) | 841 | -0.13% | 43% |
| Anavex Life Sciences Corp. (AVXL) | 839 | -0.10% | 46% |
| Masimo Corporation (MASI) | 833 | -0.02% | 47% |
| SeaSpine Holdings Corporation (SPNE) | 830 | 0.00% | 45% |
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 Assertio Holdings, Inc.'s median reaction calculated?
Every labeled ASRT 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 833 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. 46% of ASRT'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 ASRT'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.