Symrise AG is a German chemicals company that is a major producer of cosmetic ingredients, flavours and fragrances with sales of €4.999 billion in 2024. Major competitors include Givaudan and Döhler. Symrise is a member of the European Flavour Association. In 2021, Symrise was ranked 4th by FoodTalks' Global Top 50 Food Flavours and Fragrances Companies list.

Symrise was founded in 2003 by the merger of Bayer subsidiary Haarmann & Reimer (H&R) and Dragoco, both based in Holzminden, Germany.

Haarman & Reimer (H&R) was founded in 1874 by chemists Ferdinand Tiemann and Wilhelm Haarmann after they succeeded in first synthesizing vanillin from coniferin. Holzminden was the site where vanillin was first produced industrially.^{[circular reference]}

In 1917, H&R supported Leopold Ružička's unsuccessful three-year project to synthesize irone, a fragrance of violets.

In 1953, H&R was acquired by Bayer.

Dragoco was founded in 1919 by Carl-Wilhelm Gerberding and his cousin August Bellmer.

Horst-Otto Gerberding, majority holder and Chairman of the Executive Board at Dragoco, placed all of his shares into the new Syrmise corporation and the merger was completed May 23, 2003.

In April 2005, Symrise acquired Flavours Direct, a UK-based manufacturer of compounded flavours and seasonings.