RYM Oy has 53 shareholders. They represent widely the actors of the real estate and construction sector. Four cities and six research universities, research institutes or universities of applied sciences are also shareholders.
The shareholders have invested a total of 2 275 000 euros in the company.

A-shareholders (100 000 euros)

Destia Oy
City of Helsinki
Lemminkäinen Oyj
Finnish Transport Agency
Maxit Oy Ab
NCC Construction
Rautaruukki Oyj
Senaatti Properties
Skanska Oy
VTT Technical Research Centre of Finland

B-shareholders (50 000 euros)

Aitta Oy
Pöyry CM Oy
Hartela Group
Ramirent Finland Oy
Rapal Oy
SRV Group
Tampere University of Technology
Aalto University School of Science and Technology
VVO Group

C-shareholders (25 000 euros)

Tommila Architects
Helin&Co Architects
The Housing Finance and Development Centre of Finland (ARA)
AX Consulting
Cramo Finland Oy
City of Espoo
Fatman Oy
FCG Planeko Oy
Finnmap Consulting Oy
Granlund Group
KIINKO Real Estate Education
City of Lahti
Lujatalo Oy
Helsinki Metropolia University of Applied Sciences
Micro Aided Design Oy
University of Oulu
Oy Halton Group Ltd
Parma Oy
Paroc Oy Ab
Rakennustieto Oy
Ramboll Finland Oy
Rudus Oy
SPU Systems Oy
Suomen Rakennuslehti Oy
City of Tampere
Tekla Oyj
Turku University of Applied Sciences
Finnish Institute of Occupational Health
Uponor Suomi Oy
Vianova Systems Finland Oy
WSP Finland Oy