1947
Foundation and start of production at the "Birkenheck" and "Walter 1" quarries
19471954
Start of production at the "Wimpfsfeld I" quarry
19541956
Start of production at the "Salz" quarry
19561965
Start of production at the "Maienburg" quarry
19651969
Commissioning of our central laboratory
19691970
Start of production at the "Georg" quarry
19701971
Start of production at the "Wimpfsfeld II" quarry and commissioning of the "Wimpfsfeld I" homogenisation plant
19711976
Takeover of Müllenbach & Thewald, Höhr-Grenzhausen
19761977
Commissioning of the "Maienburg" homogenisation plant
19771983
Start of production at the "Sedan" quarry
19831983
Commissioning of the "Maienburg" preparation plant
19831984
Commissioning of the "Sedan" homogenisation plant
Takeover of Capitain & Co., Vallendar
1988
Takeover of the "Töpferkaut" quarry
Commissioning of the "Sedan" preparation plant
1990
Founding of stephan schmidt meissen gmbh
19901991
Takeover of TGA Tonbergbau Grube Anton GmbH & Co. KG
Takeover of Ceramat s.r.l., Italy
1994
Certification in accordance with ISO 9002
19941995
Founding of Progind s.r.l., Italy
Start of production at the "Böhmsfund" quarry
1996
Certification in accordance with ISO 9001
19961997
Founding of Cerargillum S.A., Spain
19971998
RHP certification
Founding of MTG Mittelhessische Tonbergbau GmbH, Gießen
1999
Takeover of Marx Bergbau GmbH & Co. KG
19992000
EMAS certification
20002001
Takeover of Rohstoff Ton e.G.
20012006
Innovation Award of the Rhineland-Palatinate Raw Materials Industry
20062008
Opening of a sales office in Legnica, Poland
20082010
Approval of the General Operating Plan for Wimpfsfeld III
20102013
Stephan Schmidt jun. from the third generation becomes second Managing Partner alongside Günther Schmidt
20132016
Certification according to ISO 50001
Winner of the Raw Materials Efficiency Award of Rhineland-Palatinate
2017
Occupation of the new administrative building
Certification according to ISO 14001