Definitive Healthcare Corp. - Class A (DH)
DH moved a median of +0.12% 30 minutes after news, and +0.14% by the close. How DH actually reacts to news — the realized, point-in-time move the market made, measured across 257 labeled events over the last three years with zero look-ahead.
DH’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 43% | 257 |
| 30-min | +0.12% | 50% | 257 |
| 60-min | +0.22% | 55% | 257 |
| to close | +0.14% | 51% | 257 |
| Middle 50% of DH reactions | -1.33% to +1.43% |
|---|---|
| Median reaction (30-min) | +0.12% |
| Measured reactions | 257 |
Half of all Definitive Healthcare Corp. - Class A news events land between -1.33% 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 DH reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades | 24 | +2.68% | 71% | +4.71% |
| Rating reiterations | 44 | -0.28% | 43% | -0.37% |
| Price-target cuts | 19 | 0.00% | 42% | +1.06% |
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 DH ranks against every other measured name →
That’s how DH usually reacts — get an email when it moves on news →Email me when DH moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to DH's baseline. Nothing else.
Recent DH events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Definitive Healthcare Joins the Network Advertising Initiative to Strengthen Data Privacy Compliance in Healthcare Marketing | Press release | GlobeNewswire | -0.93% | +0.66% | |
| Form 8-K Definitive Healthcare For: Aug 28 | SEC filing · Form 8-K | SEC EDGAR | -0.47% | +1.45% | |
| Form 8-K Definitive Healthcare For: Sep 09 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.96% | |
| Definitive Healthcare Appoints Clay Ritchey as CEO | Press release | GlobeNewswire | +3.93% | +1.96% | |
| Form 8-K Definitive Healthcare For: Aug 28 | SEC filing · Form 8-K | SEC EDGAR | +3.93% | +1.96% | |
| Form 8-K Definitive Healthcare For: Sep 02 | SEC filing · Form 8-K | SEC EDGAR | +3.93% | +1.96% | |
| Special Committee of Definitive Healthcare Board Confirms Receipt of Going-Private Proposal from Advent International | Press release | GlobeNewswire | +3.93% | +1.96% | |
| Definitive Healthcare Launches Early Adopter Program for New AI-Powered Healthcare Intelligence Platform | Press release | GlobeNewswire | -0.90% | -0.15% | |
| Definitive Healthcare Announces Timing of Its Second Quarter 2026 Financial Results Conference Call and Webcast | Press release | GlobeNewswire | +0.00% | -1.09% | |
| Definitive Healthcare Corp. reports inducement grants under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | +0.00% | +2.64% | |
| Form 8-K Definitive Healthcare For: Jun 18 | SEC filing · Form 8-K | SEC EDGAR | -0.39% | -17.06% | |
| Restaurant365 Names Kate Hastings Chief Customer Officer as It Expands Investment in Customer Success | Press release | PR Newswire | +0.67% | -1.71% | |
| Form 8-K Definitive Healthcare For: Jun 04 | SEC filing · Form 8-K | SEC EDGAR | -8.31% | -9.79% | |
| Definitive Healthcare advances data platform and integrations to deliver smarter healthcare insights | Press release | GlobeNewswire | -1.27% | -3.48% | |
| Definitive Healthcare Reports Financial Results for First Quarter 2026 | Press release | GlobeNewswire | -6.67% | -9.27% | |
| Form 10-Q Definitive Healthcare For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -6.67% | -9.27% | |
| Form 8-K Definitive Healthcare For: May 07 | SEC filing · Form 8-K | SEC EDGAR | -6.67% | -9.27% | |
| Definitive Healthcare Announces Timing of Its First Quarter 2026 Financial Results Conference Call and Webcast | Press release | GlobeNewswire | -0.99% | +0.99% | |
| Form ARS Definitive Healthcare For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.99% | +0.99% | |
| Form DEF 14A Definitive Healthcare For: Jun 04 | SEC filing · Form DEF | SEC EDGAR | -0.99% | +0.99% | |
| Form DEFA14A Definitive Healthcare | SEC filing · Form DEFA14A | SEC EDGAR | -0.99% | +0.99% | |
| Form 8-K Definitive Healthcare For: Apr 03 | SEC filing · Form 8-K | SEC EDGAR | -3.61% | -5.01% | |
| Form 8-K Definitive Healthcare For: Mar 30 | SEC filing · Form 8-K | SEC EDGAR | +0.94% | +3.77% | |
| Definitive Healthcare Reports Financial Results for Fourth Quarter and Full Fiscal Year 2025 | Press release | GlobeNewswire | -2.36% | +0.79% | |
| Form 10-K Definitive Healthcare For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -2.36% | +0.79% | |
| Form 8-K Definitive Healthcare For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | -2.36% | +0.79% | |
| Form S-8 Definitive Healthcare | SEC filing · Form S-8 | SEC EDGAR | -2.36% | +0.79% | |
| Definitive Healthcare Announces Timing of Its Fourth Quarter and Full Year 2025 Financial Results Conference Call and Webcast | Press release | GlobeNewswire | +2.56% | +4.04% | |
| Definitive Healthcare to Present at the 28th Annual Needham Growth Conference | Press release | GlobeNewswire | +0.78% | +0.78% | |
| Definitive Healthcare Reports Financial Results for Third Quarter Fiscal Year 2025 | Press release | GlobeNewswire | +6.20% | +6.93% | |
| Form 10-Q Definitive Healthcare For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +6.20% | +6.93% | |
| Form 8-K Definitive Healthcare For: Nov 06 | SEC filing · Form 8-K | SEC EDGAR | +6.20% | +6.93% | |
| Definitive Healthcare Announces Timing of Its Third Quarter 2025 Financial Results Conference Call and Webcast | Press release | GlobeNewswire | -1.68% | +0.00% | |
| Definitive Healthcare to Present at the Morgan Stanley 23rd Annual Global Healthcare Conference | Press release | GlobeNewswire | +0.27% | +2.91% | |
| Definitive Healthcare Reports Financial Results for Second Quarter Fiscal Year 2025 | Press release | GlobeNewswire | +5.68% | -7.66% | |
| Form 10-Q Definitive Healthcare For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +5.68% | -7.66% | |
| Form 8-K Definitive Healthcare For: Aug 07 | SEC filing · Form 8-K | SEC EDGAR | +5.68% | -7.66% | |
| Definitive Healthcare Announces Timing of Its Second Quarter 2025 Financial Results Conference Call and Webcast | Press release | GlobeNewswire | -0.03% | +1.61% | |
| Form 8-K Definitive Healthcare For: Jul 20 | SEC filing · Form 8-K | SEC EDGAR | -0.24% | -4.76% | |
| Definitive Healthcare Corp. reports inducement grants under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -1.48% | -0.98% | |
| Form 8-K Definitive Healthcare For: Jun 25 | SEC filing · Form 8-K | SEC EDGAR | -1.48% | -0.98% | |
| Form 8-K Definitive Healthcare For: Jun 05 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.40% | |
| Definitive Healthcare Corp. reports inducement grants under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -0.31% | +6.73% | |
| Definitive Healthcare Reports Financial Results for First Quarter Fiscal Year 2025 | Press release | GlobeNewswire | +7.61% | +0.27% | |
| Form 10-Q Definitive Healthcare For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +7.61% | +0.27% | |
| Form 8-K Definitive Healthcare For: May 08 | SEC filing · Form 8-K | SEC EDGAR | +7.61% | +0.27% | |
| Definitive Healthcare Announces Timing of Its First Quarter 2025 Financial Results Conference Call and Webcast | Press release | GlobeNewswire | -1.61% | +0.74% | |
| Form ARS Definitive Healthcare For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.76% | +3.44% | |
| Form DEF 14A Definitive Healthcare For: Jun 05 | SEC filing · Form DEF | SEC EDGAR | -0.76% | +3.44% | |
| Form DEFA14A Definitive Healthcare | SEC filing · Form DEFA14A | SEC EDGAR | -0.76% | +3.44% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the DH section they belong to.
Where else DH is measured.
DH earnings → · Analyst actions → · SEC filings →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Definitive Healthcare Corp. - Class A's median reaction calculated?
Every labeled DH 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 257 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. 50% of DH'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 DH'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.