Your success is our mission


Voluntary audits in accordance with the Budget Principles Law

Statuatory and voluntary annual audits of stock corporations and partnerships in accordance with §§319 HGB


Voluntary audits in accordance with investment law (§24 Gesetz über Vermögensanlagen VermAnlG)


Voluntary risk management audits

Statuatory audits of listed stock corporations under §319a HGB

Other Services

Share valuations under S 8 (IDW) Fair Opinion


Business consulting on various topics


Evaluations of internal control systems

Company valuations under IDW S 1

Our Clients

A broad spectrum

Listed stock corporations

Large partnerships as defined in § 264 b HGB

International corporations

Clients in numbers

Sales volume: EUR 500,000 to 500,000,000

Balance sum: EUR 400,000 to 146,000,000

Employees: 100 – 500

Management Team

Gertrud K. Deffner

Diploma in Business Administration (Diplom-Kauffrau)
Certified Public Auditor since 2000
Tax Consultant since 1997

Author on the fundamentals of business evaluations:
„Schnelleinstieg BWA“ (Haufe)

Walter Okon

Diploma in Business Administration (Diplom-Kaufmann)
Certified Public Auditor since 1997
Tax Consultant since 1990

Fundamentals and skills

German Law, Tax Law, German Commercial Code (HGB)


International Financial Reporting Standards (IFRS)

Investment Law (Vermögens-anlagegesetz VermAnlG)


Auditors‘ Society (Wirtschaftsprüferkammer) N° 151 1221 00

IDW  – Institute of Public Auditors

Wp-net association of German Public Auditors

Liability insurance: Hiscox Insurance VH.VSH.1250737

We are looking forward
to our productive cooperation!

Feel free to contact us
using the contact information below

Gertrud Deffner

Schwarzwaldstr. 32
79333 Lahr

Phone +49 78 21 28 89 943
Mobile +49 160 52 71 215

Walter Okon

Mollstr. 33
68165 Mannheim

+49 62 14 18 32 34