| Chronological Order | Organisation | Established Year | Established In / Through | Headquarters | First Meeting | Last Meeting / Status (2025) |
|---|---|---|---|---|---|---|
| 1 | NATO | 1949 (North Atlantic Treaty signed on 4 April 1949) | Washington DC Treaty | Brussels, Belgium | First formal NATO Summit held in Paris (16–19 Dec 1957) | 2025 – The Hague |
| 2 | Pacific Islands Forum (PIF) | 1971 | New Zealand | Suva, Fiji | 1971 | 2025 – Tonga |
| 3 | G7 | 1975 | France | — | First G7 (G6) Summit held at Château de Rambouillet, France (15–17 Nov 1975) | 51st G7 Summit (2025) – Kananaskis, Alberta, Canada |
| 4 | ASEAN | 8 August 1967 | Bangkok Declaration | Jakarta, Indonesia | First ASEAN Summit held in Bali, Indonesia (23–25 Feb 1976) | 2025 – Malaysia |
| 5 | SAARC | 8 December 1985 | Dhaka | Kathmandu, Nepal | 1985 – Dhaka | No summit after 2014 |
| 6 | MERCOSUR | 1991 | Treaty of Asunción | Montevideo, Uruguay | 1991 | 2025 – Argentina |
| 7 | European Union (EU) | 1993 | Maastricht Treaty | Brussels, Belgium | 1993 | 2025 |
| 8 | G20 | 1999 | Berlin | Washington DC (USA). - 2008 | 2025 – South Africa | |
| 9 | African Union (AU) | Founded: 1963 Officially Launched: 2002 | Addis Ababa, Ethiopia | 2002 | Durban-2002 | |
| 10 | BIMSTEC | 1997 | Bangkok Declaration | Dhaka, Bangladesh | 2004 | 2025 – Thailand |
| 11 | BRICS | 2009 | Yekaterinburg, Russia | 2009 | 2025 – Brazil | |
| 12 | Connect Asia Policy (India) | 2014 | India | — | — | Ongoing |
| 13 | International Solar Alliance (ISA) | 2015 | Paris (COP-21) | Gurugram, India | 2018 | 2025 – India |
| 14 | Raisina Dialogue | 2016 | New Delhi | New Delhi | 2016 | 2025 – New Delhi |
| 15 | G4 (UN Reform Group) | 2004 | — | No Headquarters | UN Reform Talks | Ongoing |
| Organisation | Total Members | Head | Latest Member Added / Status | Imp Points / Key Points |
|---|---|---|---|---|
| International Solar Alliance (ISA) | 124 | Ashish Khanna | Multiple (2024) | India–France initiative; HQ in Gurugram; focuses on solar energy cooperation |
| African Union (AU) | 55 | Political Head: H.E. João Manuel Gonçalves Lourenço (President of Angola; Chairperson AU from Feb 2025) Administrative Head: H.E. Mahamoud Ali Youssouf (Chairperson, AUC) Previous AUC Chairperson: Moussa Faki Mahamat (March 2017 – March 2025) | Successor of OAU; covers entire African continent | |
| European Union (EU) | 27 | Members: 27; Meetings held 4 times a year; Regional political & economic grouping; ECSC (1953); EEC (1957); Informal forum (1974); Maastricht Treaty (1993); Lisbon Treaty enacted (2009) | ||
| NATO | 32 | Mark Rutte (Secretary-General from 1 Oct 2024) | 32nd Member: Sweden (2024) | World’s largest military alliance; Collective defence under Article 5 |
| G20 | 20 | Presidency held by South Africa; President Cyril Ramaphosa leading 2025 cycle | African Union (2023) | 21st G20 Summit; 2026 G20 Miami Summit |
| Pacific Islands Forum (PIF) | 18 | Focus on Pacific regional cooperation | ||
| ASEAN | 10 | Timor-Leste - 11th Member | “ASEAN Way”; major regional bloc in Southeast Asia | |
| SAARC | 8 | — | Summits stalled since 2014 | |
| BIMSTEC | 7 | 6th BIMSTEC Summit (2025)
| ||
| G7 | 7 | Informal group of advanced economies | ||
| BRICS | 10 | Indonesia (joined Jan 6, 2025 | 7th BRICS Summit, 2025 Host & Venue: Rio de Janeiro, Brazil | |
| MERCOSUR | 5 | Bolivia (2024) | Venezuela suspended in 2016 | |
| G4 | 4 | Push for permanent UNSC membership | ||
| Raisina Dialogue | — | — | India’s flagship geopolitical conference | |
| Connect Asia Policy | — | — | Indian foreign policy initiative (not an organisation) |
| Member Number | Country |
|---|---|
| 96th | Hungary |
| 97th | Panama |
| 99th | Spain |
| 100th | Paraguay |
| 101st | Nepal |
| 104th (Full Member) | Armenia |
| 106th | Armenia |
| 107th | Moldova |
| 119th | Malta |
For the 2024–2026 term, India holds the Presidency and France holds the Co-Presidency of the International Solar Alliance (ISA)
Full Members (10):
Partner Countries (10 invited at 2025 Summit):