- A : Aegviidu Puit AS
- Agrosilva AS
- Artiston OÜ
- B : Baltic Connexions OÜ
- Baltwood AS
- Barrus AS
- Benito Puit AS
- Billerudkorsnäs Estonia OÜ
- Biolan Baltic OÜ
- BM Certification Estonia OÜ
- C : Combimill Reopalu OÜ
- Combimill Sakala OÜ
- Combiwood OÜ
- E : Ecobirch AS
- Eesti Energia AS
- Eesti Maaülikool
- Enco Est OÜ
- Erapuit AS
- Estonian Cell AS
- Estonian Plywood AS
- G : Graanul Invest AS
- H : Hansacom OÜ
- HD Forest AS
- Hekotek AS
- Holmen Mets AS
- Holttem AS
- I : Intrac Eesti AS
- J : JS Inseneribüroo OÜ
- K : Kaamos Timber AS
- Karo Mets OÜ
- Kohila Vineer OÜ
- L : Laesti AS
- Lasita Maja OÜ
- Lemeks AS
- Lotus Timber OÜ
- Luua Metsanduskool
- M : Metsä Forest Eesti AS
- Metsakohin OÜ
- N : NCS Estonia OÜ
- P : Palmako AS
- Pärnu Mets AS
- Peetri Puit OÜ
- Preferred by Nature OÜ
- Puidukoda OÜ
- Puumerkki AS
- R : Rait AS
- Rebruk AS
- Reta Puit OÜ
- Roger Puit AS
- S : SCA Metsad Eesti AS
- Stora Enso Eesti AS
- T : TalTech Puidutehnoloogia labor
- Tapa Mill OÜ
- Tarmeko Spoon AS
- Tartu Graanul AS
- Thermory AS
- Timbeter OÜ
- Toftan AS
- Tornator Eesti OÜ
- U : UPM OÜ
- UPM-Kymmene Otepää OÜ
- V : Valga Puu OÜ
- Vara Saeveski OÜ
- Viiratsi Saeveski AS
- Viru Keemia Grupp AS
- Viru-Nigula Saeveski AS
- VMF Estonia OÜ
- Võrumaa Kutsehariduskeskus
- W : Warmeston OÜ
- Woodpecker Software OÜ
- Woodwell AS
