AESI is a multi-use abbreviation; without more context, it has several common meanings. The most frequent modern expansions are below, so you can match the one that fits your situation.

Most common meanings of AESI

  • Adverse Events (or Event) of Special Interest – A category of safety events that are monitored very closely in clinical trials and drug or vaccine safety work.
  • Aeronautical Society of India – A professional society in India focused on aeronautical and aerospace engineering.
  • Atlas Energy Solutions Inc. – A U.S. energy company (ticker: AESI) involved in proppant sand and related services for oil and gas.

Other less-common expansions

According to abbreviation directories, AESI can also stand for various organizations and initiatives, for example:

  • Agricultural Environmental Stewardship Initiative
  • Albin Engineering Services Inc
  • Australian Essential Safety Inspections
  • Agricultural Economics Society of Ireland
  • Advanced Engine System Institute
  • Alternative Energy Solutions International
  • Associated Earth Sciences Inc / Associated Engineering Sciences Inc
  • Action Equipment Solutions Inc
  • Agrupación Empresarial de Servicios Integrales

All of these are valid in their own niches, so the “right” answer depends on where you saw the abbreviation (medicine, engineering, finance, agriculture, etc.).

Quick reference table

[5][7][1][9] [8] [10] [3] [3]
Context Likely meaning of “AESI”
Clinical trials, vaccines, pharmacovigilance Adverse Events (or Event) of Special Interest
Aviation / aerospace in India Aeronautical Society of India
Stock market, NYSE: AESI Atlas Energy Solutions Inc.
Agriculture / environment policy Agricultural Environmental Stewardship Initiative
Engineering companies (USA, etc.) Albin Engineering Services Inc; Associated Earth Sciences Inc; Associated Engineering Sciences Inc
If you tell me where you saw “AESI” (e.g., medical paper, Indian engineering forum, finance news), I can narrow it down to the single most probable expansion.