GSE Systems, Inc. (GVP)
GVP moved a median of 0.00% 30 minutes after news, and +0.25% by the close. How GVP actually reacts to news — the realized, point-in-time move the market made, measured across 135 labeled events over the last three years with zero look-ahead.
GVP’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.03% | 51% | 104 |
| 30-min | 0.00% | 49% | 122 |
| 60-min | +0.11% | 52% | 124 |
| to close | +0.25% | 54% | 125 |
| Middle 50% of GVP reactions | -0.74% to +0.82% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 135 |
Half of all GSE Systems, Inc. news events land between -0.74% and +0.82% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when GVP moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to GVP's baseline. Nothing else.
Recent GVP events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form POS AM GSE SYSTEMS INC | SEC filing · Form POS | SEC EDGAR | — | — | |
| Form S-8 POS GSE SYSTEMS INC | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Form 8-K GSE SYSTEMS INC For: Oct 31 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| GSE Solutions and Pelican Energy Partners Announce Closing of Merger | Press release | PR Newswire | — | — | |
| Form 8-K GSE SYSTEMS INC For: Oct 29 | SEC filing · Form 8-K | SEC EDGAR | +0.22% | +0.22% | |
| Stockholders Approve GSE Solutions Merger with Pelican Energy Partners | Press release | PR Newswire | +0.22% | +0.22% | |
| Form 8-K GSE SYSTEMS INC For: Oct 25 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.22% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -0.22% | |
| Form 8-K GSE SYSTEMS INC For: Oct 23 | SEC filing · Form 8-K | SEC EDGAR | +0.21% | -2.13% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.21% | -2.13% | |
| Glass Lewis Recommends Shareholders VOTE FOR the GSE Merger | Press release | PR Newswire | +0.21% | -2.13% | |
| Bradley L. Radoff Reiterates Call for GSE Systems’ Board Chair Kathryn O’Connor Gardner to Disclose 2025 Projections | Press release | Business Wire | -0.32% | +2.16% | |
| Form 8-K GSE SYSTEMS INC For: Oct 22 | SEC filing · Form 8-K | SEC EDGAR | -0.32% | +2.16% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | -0.32% | +2.16% | |
| GSE Solutions Encourages Stockholders to VOTE FOR the AMENDED Merger | Press release | PR Newswire | -0.32% | +2.16% | |
| Bradley L. Radoff Urges GSE Systems’ Board Chair Kathryn O’Connor Gardner to Release 2025 Projections | Press release | Business Wire | +0.66% | +1.31% | |
| Form 8-K GSE SYSTEMS INC For: Oct 18 | SEC filing · Form 8-K | SEC EDGAR | +0.66% | +1.31% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.66% | +1.31% | |
| GSE Solutions and Pelican Energy Partners Announce Amendment to Merger Agreement Providing for Increase in Merger Consideration to $4.60 Per Share | Press release | PR Newswire | +0.66% | +1.31% | |
| Bradley L. Radoff Issues Open Letter to GSE Systems’ Board of Directors to State Opposition to Proposed Sale to Pelican Energy Partners | Press release | Business Wire | +1.20% | +4.33% | |
| Form 8-K GSE SYSTEMS INC For: Oct 14 | SEC filing · Form 8-K | SEC EDGAR | +0.66% | +1.31% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.66% | +1.31% | |
| Form 8-K GSE SYSTEMS INC For: Oct 16 | SEC filing · Form 8-K | SEC EDGAR | +0.49% | +2.93% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.49% | +2.93% | |
| ISS Recommends Shareholders VOTE FOR the GSE Merger | Press release | PR Newswire | +0.49% | +2.93% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -1.09% | |
| Form 8-K GSE SYSTEMS INC For: Oct 02 | SEC filing · Form 8-K | SEC EDGAR | +0.24% | -0.49% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.24% | -0.49% | |
| Form DEFM14A GSE SYSTEMS INC | SEC filing · Form DEFM14A | SEC EDGAR | — | +0.25% | |
| Form DEFM14A GSE SYSTEMS INC | SEC filing · Form DEFM14A | SEC EDGAR | -0.74% | -0.49% | |
| GVP Stock Alert: Halper Sadeh LLC Is Investigating Whether the Sale of GSE Systems, Inc. Is Fair to Shareholders | Press release | Business Wire | +0.99% | +0.00% | |
| Form PREM14A GSE SYSTEMS INC For: Sep 04 | SEC filing · Form PREM14A | SEC EDGAR | +0.00% | +1.00% | |
| Form 10-Q GSE SYSTEMS INC For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.25% | -0.99% | |
| Form 8-K GSE SYSTEMS INC For: Aug 14 | SEC filing · Form 8-K | SEC EDGAR | +0.25% | -0.99% | |
| GSE Systems Reports Second Quarter 2024 Financial Results | Press release | PR Newswire | +0.25% | -0.99% | |
| Form 8-K GSE SYSTEMS INC For: Aug 07 | SEC filing · Form 8-K | SEC EDGAR | -0.00% | +0.00% | |
| GSE Solutions to be Acquired by Pelican Energy Partners | Press release | PR Newswire | -0.00% | +0.00% | |
| GVP Investigation Alert: Halper Sadeh LLC Is Investigating Whether the Sale of GSE Systems, Inc. Is Fair to Shareholders | Press release | Business Wire | +0.13% | +0.51% | |
| Lifshitz Law PLLC Announces Investigations of GVP, RXRX, OBDE, and TWKS | Press release | Accesswire | +0.25% | +1.01% | |
| GSE Solutions to Attend ANS UWC Conference 2024 | Press release | PR Newswire | +0.00% | +1.50% | |
| Form 8-K GSE SYSTEMS INC For: Jul 22 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +1.50% | |
| Rolls-Royce SMR Signs $1.5M Contract for Cutting-edge GSE Simulation Technology | Press release | PR Newswire | +3.04% | -2.61% | |
| Form 8-K GSE SYSTEMS INC For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.04% | |
| GSE Solutions Awarded Contract by Major Utility Company for Nuclear Flow Accelerated Corrosion Update Services | Press release | PR Newswire | +1.66% | +9.72% | |
| Form DEFA14A GSE SYSTEMS INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | +17.18% | |
| Form DEF 14A GSE SYSTEMS INC For: Jul 01 | SEC filing · Form DEF | SEC EDGAR | +2.86% | +6.29% | |
| GSE Solutions to Participate in the Lytham Partners Spring 2024 Investor Conference on May 30, 2024 | Press release | PR Newswire | — | -6.77% | |
| Form 10-Q GSE SYSTEMS INC For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | — | -11.29% | |
| Form 8-K GSE SYSTEMS INC For: May 15 | SEC filing · Form 8-K | SEC EDGAR | — | -11.29% | |
| GSE Systems Reports First Quarter 2024 Financial Results | Press release | PR Newswire | — | -11.29% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the GVP section they belong to.
Where else GVP is measured.
GVP earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| TREND MICRO INC S/ADR (TMICY) | 137 | 0.00% | 27% |
| Zedge, Inc. Class B (ZDGE) | 136 | +0.37% | 53% |
| Kinaxis Inc (KXS_TSE) | 135 | +0.12% | 54% |
| Identillect Technologies Corp (ID_CDNX) | 134 | 0.00% | 23% |
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 GSE Systems, Inc.'s median reaction calculated?
Every labeled GVP 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 135 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. 49% of GVP'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 GVP'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.