About
Osesam
OUR VALUES
OUTSTANDING SERVICE
BOLDNESS
INNOVATION
DISCIPLINE
Our Team
In 2020, Stéphane Pesic and Alain Hortion co-founded OSESAM with the ambition of carrying forward a commitment to quality forged throughout their careers at LVMH – L Real Estate. OSESAM supports family offices and specialised funds as an operating partner, combining strategic rigor with bespoke execution.
Today, OSESAM is a multidisciplinary team of professionals dedicated to working alongside its clients and partners to bring their real estate strategy to life and enhance its value.
Alain Hortion
Co-Founder
Managing Partner
In 2020, Alain co-founded Osesam alongside Stéphane, with the ambition of carrying forward the high standards of excellence cultivated throughout his journey at L Real Estate. Osesam serves family offices and specialized funds as an operating partner, combining strategic acumen with bespoke execution.
In 2008, Alain took part in the creation of L Real Estate (now L Catterton Real Estate), a platform backed by Agache-LVMH. Over the course of fifteen years, he actively contributed to the development of high-end, large-scale mixed-use real estate projects across the United States, Europe, and Asia, representing over €2 billion in assets under management. He led the structuring and execution of transactions, financing strategies, development oversight, and key partner relationships.
Prior to joining Groupe Arnault – LVMH, Alain held senior roles as CFO and executive committee member in three fast-growing European companies. He supported their expansion, culminating in two successful buyouts and a stock market listing.
After graduating from ESSEC Business School (Grande École), Alain began his career as a consultant at EY/Andersen before joining Mazars as a Director, where he led investment advisory services for major clients in Central Europe.
Where might you find Alain? At home, playing a Hungarian Dance four-hands at the piano with his eldest daughter, or Twinkle, Twinkle, Little Star with his youngest. On a tennis court in the south of France, taking on challenges from his son. Or in Paris, cycling alongside his wife, ever-curious, inspired by the city’s beauty and always in pursuit of new ventures.
Stéphane Pesic
Co-Founder
Managing Partner
In 2007, Stéphane joined Bernard Arnault’s family office (Agache – LVMH), where he sourced and acquired landmark real estate assets—both for long-term hold and value-added strategies—across office, retail, and residential sectors.
Concurrently, he helped establish L Real Estate (today L Catterton Real Estate), a platform backed by Agache-LVMH. During these years, he contributed to the platform’s global expansion by identifying and developing high-end mixed-use projects (shopping mall/residential/office) in support of the growth of LVMH maisons, particularly in markets where the Group’s presence needed strengthening (EMEA).
Stéphane began his international career at Crédit Agricole in Hong Kong, then moved to Defi, Europe’s leading outdoor advertising company, before joining major real estate players such as Caisse des Dépôts, Bouygues Immobilier, and Nexity—where he served as Director of Development—prior to his role at the Agache-LVMH family office.
He holds dual master’s degrees in Public Law and Business Law from Panthéon-Assas (Sorbonne) and a Master’s in Finance from PSL University (Paris Dauphine).
Where might you find Stéphane? In his spare time, you’re likely to find him wandering museums or art and design galleries in Paris or abroad, ever in search of inspiration for his true passion, drawing. A voracious reader, he is also known for his ongoing civic engagement. And if you’ve missed him high up in the Alpine mountains, you may instead find him diving into the ocean’s depths or driving the open road alongside fellow classic-car enthusiasts.
Between 2018 and 2022, Juan worked in Mata Capital's investments division, where he was involved in around a dozen transactions (acquisitions, sales, asset or share deals) across various asset types (offices, hotels, logistics, health, commerce) in France, mainly involving value-add/opportunistic strategies, worth approximately €250 M in total.
He is a graduate of the École Spéciale des Travaux Publics (ESTP) and holds an MSc in International Real Estate & Finance (University of Glasgow).
If he's not bitten off more than he can chew with his latest sporting challenge, you can usually find Juan enjoying some quality time with his friends, combining sports, outdoor pursuits and relaxation. You might also catch him in Paris enjoying all the good things the French capital has to offer with his friends.
Before joining OSESAM, Clément was involved in around a dozen transactions spanning five years in the Offices – Development & Major Projects team at VINCI Immobilier. In this role, he supervised all development phases (off-plan property purchasing, real estate development contracts, delegated project management, etc.) on behalf of private or semi-public institutional stakeholders. Clément is a graduate of the École Spéciale des Travaux Publics (ESTP).
You'll generally find Clément bouldering, dancing at a music event, or outdoors indulging his passion for any sport you can practice on a board or skis. When not on a long-distance train ride to discover a new city, you'll probably find him sitting with his friends outside a Paris café setting the world to rights.