No insider purchase over the last 90 days. The latest was filed 31 Dec 2025.
This page follows insider dealings at Assystem as filed with AMF, a company from the Business Services sector based in Paris, France. The group dates from 1966. In the past year (18 October 2025 to 18 October 2026), 3 filings came from 2 insiders.
On the market, 1 insider bought (2 purchases totalling €5,986) while 1 insider sold (1 sale totalling €70k). The net balance comes to €64k on the selling side. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. Biggest ticket of the year: €70k, sold by Ashish TANDON and made public on 4 November 2025. The buyers include 1 senior executive.
Compared with its exchange (316 companies, median 6 filings), a count of 3 filings is below the norm. The full history, which starts in 2021, counts 36 purchases against 7 sales.
Within a 30-day window, 1 purchase overlapped with buying by a second insider. Purchases made close together by different insiders form what is called a cluster. The clock since the last published purchase (31 December 2025) now reads 290 days. Typically, a trade is published a median of 1 day after it takes place. The regulation allows three business days to notify a trade (MAR article 19).
For comparison within the same sector, see the insider buying recorded at Coursera, Inc. Every figure here comes from the filings published by AMF and describes the past, not future prices; it is not investment advice.
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
Transparent value + quality ranking, distinct from the insider signal.
FY ended December 2025 · cache
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Assystem is a French engineering and project-management group focused on highly regulated industries, with nuclear energy at the core of its identity and strategy. Founded more than 60 years ago, the company has developed a long-standing reputation for supporting complex industrial and infrastructure projects across their full life cycle, from concept and design through construction, operations support, life-extension and decommissioning. Historically rooted in the nuclear sector, Assystem now ranks among the world’s leading nuclear engineering firms and was ranked 2nd worldwide in the ENR 2025 “Nuclear Plants” category. The group presents itself as an active contributor to the global energy transition, leveraging engineering expertise, digital solutions and program management to improve the safety, efficiency and sustainability of critical assets. Assystem’s business model is built around three main pillars: engineering services, digital services and project management. In practice, this means supporting clients with technical studies, safety engineering, owner’s engineering, construction assistance, maintenance optimization, reactor life extension, fuel-cycle-related services, waste management and dismantling. Beyond nuclear, the group also works on selected energy and infrastructure projects, which broadens its technical base while keeping its strategic focus on complex, regulated environments. Assystem states that it operates in 13 countries and employs around 8,000 “Switchers,” reflecting a sizeable international footprint and a highly skilled workforce. This global reach enables the company to serve major industrial and public-sector customers across Europe, the Middle East, Asia and North America. A key differentiator is Assystem’s strong safety culture, which is central to nuclear risk management and the company’s credibility with operators and public authorities. The group is also benefiting from renewed interest in nuclear power in multiple geographies, as governments look for low-carbon, dispatchable and sovereign energy solutions. From an investment perspective, Assystem stands out as a niche engineering services company with high technical barriers to entry, deep sector expertise and significant exposure to long-duration nuclear and energy-transition programmes.
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All recommendationsHeadquarters: Paris, France · Founded: 1966 · Wikipedia article
Source: Wikidata (CC0).