- De nordiske molekylfysikkdagene 1986 (Nordic Molecular Physics Symposium),
Vettre kurs- og konferansehotell, Asker, Norway, May 1986
Organizers: Knut Fægri, Trygve Helgaker, Claus Jørgen Nielsen
- Dalton 2000 Workshop,
Department of Chemistry, University of Oslo, Norway, 5–7 December 1998
Attendance: 28 participants
Organizers: Trygve Helgaker (chair), Kenneth Ruud
- 70 Years of the Correlation Problem,
Department of Chemistry, University of Oslo, Norway, 3–5 June 1999
Attendance: 12 participants — 10 oral presentations
Organizers: Trygve Helgaker, Wim Klopper
- Quantum Chemistry SUP Meeting,
Department of Chemistry, University of Oslo, Norway, 9–11 November 2004
Attendance: 30 participants — 17 oral presentations
Organizer: Trygve Helgaker
- Nanoquant Midterm Meeting,
Hotel Leangkollen, Asker, Norway, 10–11 February 2006
Attendance: 58 participants — 13 oral presentations
Organizer: Trygve Helgaker
- A Coastal Voyage of Current Density Functional Theory,
University of Tromsø (first day) and
the Coastal Express (Hurtigruten) Tromsø–Trondheim, Norway, 19–22 September 2007
Attendance: 43 participants — 21 oral presentations
Organizers: Trond Saue (chair), Kenneth Ruud, Trygve Helgaker
- Molecular Properties 2009 —
Bridging the Gap between Theory and Experiment,
Thon Hotel Vettre, Asker, Norway, 18–21 June 2009
Attendance: 117 participants — 35 oral presentations, 54 poster presentations
Organizers: Trygve Helgaker (chair), Bogumil Jeziorski, Peter J. Knowles, Kenneth Ruud
- Dalton 2010 Workshop,
Department of Chemistry, University of Oslo, Norway, 11–12 January 2010
Attendance: about 25 participants
Organizers: Trygve Helgaker, Hans Jørgen Aa. Jensen
- Quantum Chemistry Beyond the Arctic Circle —
Promoting Female Excellence in Theoretical and Computational Chemistry,
Sommarøy Arctic Hotel, Sommarøy, Tromsø, Norway, 23–26 June 2010
Attendance: 77 participants — 35 oral presentations, 27 poster presentations
Organizers: Sonia Coriani (chair), Magdalena Pecul (chair), Odile Eisenstein, Kenneth Ruud, Trygve Helgaker
- Quantum Chemistry in Strong Magnetic Fields,
Laboratoire National des Champs Magnétiques Intenses,
Université Paul Sabatier Toulouse, Toulouse, France, 13–14 September 2010
Attendance: 40 participants — 12 oral presentations
Organizers: Geert Rikken, Carlo Rizzo, Antonio Rizzo, Trygve Helgaker
- 15th European Seminar on Computational Methods in Quantum Chemistry,
Oscarsborg Fortress, Drøbak, Norway, 16–19 June 2011
Attendance: 90 participants — 19 oral presentations, 25 poster presentations
Organizers: Jürgen Gauss, Trygve Helgaker (chair), Fred Manby
- Promoting Female Excellence in Theoretical and Computational Chemistry II (FemEx),
Soria Moria Hotel, Oslo, Norway, 13–16 June 2014,
Attendance: 105 participants — 43 oral presentations, 2 poster sessions
Organizers: Odile Eisenstein (chair), Benedetta Mennucci (chair), Trygve Helgaker
- Fundamental Aspects of DFT,
The Norwegian Academy of Science and Letters, Oslo, Norway, 8–10 January 2015
Attendance: 57 participants — 25 oral presentations, 14 poster presentations
Organizers: Trygve Helgaker, Simen Kvaal
- Advances in Electronic Structure Theory —
Celebrating the Contributions of Andreas Savin,
Amphi Charpak, Jussieu Campus, Université Pierre-et-Marie-Curie, Paris, France, 27–29 April 2015
Attendance: 104 participants — 31 oral presentations
Organizers: Paola Gori-Giorgi, Trygve Helgaker, Gustavo Scuseria, Julien Toulouse (chair)
- Hylleraas Symposium,
The Norwegian Academy of Science and Letters, Oslo, Norway, 23 November 2015
Attendance: 50 participants — 7 oral presentations
Organizers: Trygve Helgaker (chair), Jürgen Gauss, Thomas B. Pedersen, Trond Saue
- Magical Mystery Tour of Electron Correlation —
in Honour of Jeppe Olsen on the Occasion of his 60th Birthday,
The Norwegian Academy of Science and Letters, Oslo, Norway, 24–26 October 2016
Attendance: 68 participants — 32 oral presentations, 12 poster presentations
Organizers: Trygve Helgaker (chair), Thomas B. Pedersen, Simen Reine
- 50th Anniversary of the International Academy of Quantum Molecular Science,
Salon de Grande Bretagne, Palais de l’Europe, Menton, France, 30 June 2017
Attendance: 52 participants — 15 oral presentations
Organizers: Trygve Helgaker (chair), Bogumił Jeziorski, Odile Eisenstein
- Adventures from Numerical Quantum Chemical Methods to Biological Systems and Beyond —
in Honour of Dage Sundholm on the Occasion of this 60th Birthday
(Molecules in Extreme Environments Midterm Meeting),
The Norwegian Academy of Science and Letters, Oslo, Norway, 15–17 January 2018
Attendance: 70 participants — 34 oral presentations, 17 poster presentations
Organizers: Heike Fliegl (chair), Trygve Helgaker, Mikael Johansson, Raphael Berger, Michael Patzschke, Ville Kalla
- Mathematical Methods in Quantum Chemistry,
Mathematisches Forschungsinstitut Oberwolfach, Oberwolfach–Walke, Germany, 18–24 March 2018
Attendance: 42 participants — 32 oral presentations
Organizers: Eric Cancès, Gero Friesecke, Trygve Ulf Helgaker, Lin Lin
- Atoms, Molecules and Materials in Extreme Environments,
The Norwegian Academy of Science and Letters, Oslo, Norway, 4–6 June 2018
Attendance: 57 participants — 24 oral presentations, 13 poster presentations
Organizers: Trygve Helgaker (chair), Trond Saue, Peter Schwerdtfeger
- Chemistry 2019: On Odd Hassel’s Shoulders,
Science Library and Department of Chemistry, University of Oslo, Oslo, Norway, 31 October 2019
The Norwegian Academy of Science and Letters, Oslo, Norway, 1 November 2019
Attendance Day 1: 100 participants — 3 welcome addresses, 4 oral contributions
Attendance Day 2: 95 participants — 9 oral presentations
Organizers: Kari Kveseth (chair), Einar Uggerud, Trygve Helgaker, Ute Krengel, Mohamed Amedjkouh
- Faraday Discussion: New Horizons in Density-Functional Theory,
online, United Kingdom, 2–4 September 2020
Attendance: 176 participants — 20 oral presentations, 4 discussions, 30 poster presentations
Organizers: Andy Teale (chair), Emmanuel Fromager, Paola Gori-Giorgi, Trygve Helgaker, Chris Kriton-Skylaris, David Tozer