Aspen Technology, Inc. (AZPN)
AZPN moved a median of +0.02% 30 minutes after news, and +0.02% by the close. How AZPN actually reacts to news — the realized, point-in-time move the market made, measured across 251 labeled events over the last three years with zero look-ahead.
AZPN’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 43% | 226 |
| 30-min | +0.02% | 53% | 230 |
| 60-min | +0.02% | 52% | 230 |
| to close | +0.02% | 53% | 230 |
| Middle 50% of AZPN reactions | -0.27% to +0.26% |
|---|---|
| Median reaction (30-min) | +0.02% |
| Measured reactions | 251 |
Half of all Aspen Technology, Inc. news events land between -0.27% and +0.26% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How AZPN reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 17 | +0.39% | 94% | +1.83% |
| Coverage initiations | 15 | +0.02% | 67% | +0.03% |
| Rating reiterations | 18 | +0.01% | 50% | -0.03% |
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 AZPN ranks against every other measured name →
That’s how AZPN usually reacts — get an email when it moves on news →Email me when AZPN moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AZPN's baseline. Nothing else.
Recent AZPN events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 15-12G Aspen Technology, Inc. | SEC filing · Form 15-12G | SEC EDGAR | — | — | |
| Form 8-K Aspen Technology, Inc. For: Mar 12 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K Aspen Technology, Inc. For: Mar 11 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form S-8 POS Aspen Technology, Inc. | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Form 8-K Aspen Technology, Inc. For: Mar 07 | SEC filing · Form 8-K | SEC EDGAR | +0.04% | -0.23% | |
| Form CT ORDER Aspen Technology, Inc. | SEC filing · Form CT | SEC EDGAR | -0.00% | -0.05% | |
| Elliott Statement on Aspen Technology, Inc. | Press release | Canada Newswire | +0.09% | -0.04% | |
| Elliott Statement on Aspen Technology, Inc. | Press release | Canada Newswire | -0.43% | -0.89% | |
| Aspen Technology Announces Financial Results for the Second Quarter of Fiscal 2025 | Press release | Business Wire | -0.11% | +0.34% | |
| Form 10-Q Aspen Technology, Inc. For: Dec 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.11% | +0.34% | |
| Form 8-K Aspen Technology, Inc. For: Feb 04 | SEC filing · Form 8-K | SEC EDGAR | -0.11% | +0.34% | |
| Aspen Technology Shareholders Opposed to Emerson Takeover Should Contact Julie & Holleman Regarding Potential Legal Claims | Press release | PR Newswire | -0.02% | -0.03% | |
| AZPN Stock Alert: Halper Sadeh LLC Is Investigating Whether the Sale of Aspen Technology, Inc. Is Fair to Shareholders | Press release | Business Wire | +0.04% | +0.12% | |
| Form 8-K Aspen Technology, Inc. For: Jan 26 | SEC filing · Form 8-K | SEC EDGAR | +0.26% | +0.32% | |
| Aspen Technology Announces Date of Second-Quarter Fiscal Year 2025 Financial Results Release, Conference Call and Webcast | Press release | Business Wire | -0.32% | -0.38% | |
| Form 8-K Aspen Technology, Inc. For: Dec 17 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.67% | |
| Aspen Technology Helps Leading Energy Transmission Company in Latin America Deliver 99.99 Percent Power Reliability to Customers | Press release | Business Wire | -0.43% | -0.26% | |
| Aspen Technology Forms Special Committee to Evaluate Non-Binding Acquisition Proposal from Emerson | Press release | Business Wire | +0.18% | -0.62% | |
| Aspen Technology Chosen to Optimize Renewable Generation For Iceland’s Largest Power Producer | Press release | Business Wire | +0.39% | +0.41% | |
| Aspen Technology Announces Receipt of Unsolicited Acquisition Proposal from Emerson | Press release | Business Wire | -0.15% | +0.96% | |
| Aspen Technology Announces Expansion of Digital Grid Management Suite with Acquisition of Open Grid Systems | Press release | Business Wire | -0.90% | -1.71% | |
| Aspen Technology Announces Financial Results for the First Quarter of Fiscal 2025 | Press release | Business Wire | -0.90% | -1.71% | |
| Form 10-Q Aspen Technology, Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.90% | -1.71% | |
| Form 8-K Aspen Technology, Inc. For: Nov 04 | SEC filing · Form 8-K | SEC EDGAR | -0.90% | -1.71% | |
| Form ARS Aspen Technology, Inc. For: Jun 30 | SEC filing · Form ARS | SEC EDGAR | +0.28% | +0.44% | |
| Form DEF 14A Aspen Technology, Inc. For: Jun 30 | SEC filing · Form DEF | SEC EDGAR | +0.28% | +0.44% | |
| Form DEFA14A Aspen Technology, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.28% | +0.44% | |
| Aspen Technology Announces Date of First-Quarter Fiscal Year 2025 Financial Results Release, Conference Call and Webcast | Press release | Business Wire | +0.00% | -0.06% | |
| Aspen Technology Launches Microgrid Management System to Help Customers Address Power Reliability and Meet Net-Zero Goals | Press release | Business Wire | +0.20% | -0.72% | |
| Form 8-K Aspen Technology, Inc. For: Sep 19 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.06% | |
| Aspen Technology Outlines Value Creation Strategy at 2024 Investor Day | Press release | Business Wire | -0.01% | +1.05% | |
| Aspen Technology to Present at Piper Sandler Growth Frontiers Conference | Press release | Business Wire | -0.31% | +2.13% | |
| Aspen Technology to Host 2024 Investor Day | Press release | Business Wire | -0.34% | +2.04% | |
| Aspen Technology Partners with Omaha Public Power District to Support 2050 Net Zero Carbon Vision | Press release | Business Wire | -0.25% | +0.86% | |
| Form 10-K Aspen Technology, Inc. For: Jun 30 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | -0.12% | |
| Aspen Technology Announces Financial Results for the Fourth Quarter and Fiscal 2024 | Press release | Business Wire | +0.93% | -0.70% | |
| Form 8-K Aspen Technology, Inc. For: Aug 06 | SEC filing · Form 8-K | SEC EDGAR | +0.93% | -0.70% | |
| Aspen Technology Announces Date of Fourth-Quarter & Fiscal Year 2024 Financial Results Release, Conference Call and Webcast | Press release | Business Wire | +0.00% | -1.16% | |
| Form 8-K Aspen Technology, Inc. For: Jun 27 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.45% | |
| Aspen Technology Educates Next Generation of Engineers on Sustainability Competencies | Press release | Business Wire | +0.00% | -0.88% | |
| Form 8-K Aspen Technology, Inc. For: Jun 12 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.30% | |
| Form 8-K/A Aspen Technology, Inc. For: May 02 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.30% | |
| Aspen Technology Enables Customers to Drive Higher Levels of Operational Excellence with New Software Capabilities | Press release | Business Wire | -1.30% | -1.88% | |
| Aspen Technology to Present at Upcoming Investor Conferences | Press release | Business Wire | -1.30% | -1.88% | |
| Aspen Technology Announces Robert Whelan, Jr. as Newly Elected Board Chair | Press release | Business Wire | +0.29% | +4.69% | |
| Form 8-K Aspen Technology, Inc. For: May 09 | SEC filing · Form 8-K | SEC EDGAR | +0.29% | +4.69% | |
| Aspen Technology Announces Financial Results for the Third Quarter of Fiscal 2024 | Press release | Business Wire | +5.30% | +7.23% | |
| Aspen Technology Appoints David Baker as SVP, Chief Financial Officer | Press release | Business Wire | +5.30% | +7.23% | |
| Form 10-Q Aspen Technology, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +5.30% | +7.23% | |
| Form 8-K Aspen Technology, Inc. For: May 02 | SEC filing · Form 8-K | SEC EDGAR | +5.30% | +7.23% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the AZPN section they belong to.
Where else AZPN is measured.
AZPN earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| AudioEye, Inc. (AEYE) | 255 | -0.26% | 45% |
| LSI Industries Inc. (LYTS) | 254 | -0.00% | 48% |
| Energizer Holdings, Inc. (ENR) | 251 | +0.08% | 53% |
| QUARTERHILL INC COMMON SHARES (QTRH) | 251 | 0.00% | 39% |
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.
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Every name we’ve measured, in one place.
How the numbers are made.
How is Aspen Technology, Inc.'s median reaction calculated?
Every labeled AZPN 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 251 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. 53% of AZPN'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 AZPN'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.