Dietrich A. Loos

Special Counsel

  • Dietrich A. Loos
  • Phone: +1 312 499 0149

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  • Duane Morris LLP
    190 South LaSalle Street, Suite 3700
    Chicago, IL 60603-3433

Dietrich A. Loos practices in the area of corporate law, including mergers and acquisitions, private equity and financing. Mr. Loos negotiates, documents and structures acquisitions and divestitures, including purchases/sales of stock and of assets. Mr. Loos represents clients in such industries as manufacturing, financial services and direct marketing.

Mr. Loos is a 1998 graduate (high honors) of the University of Chicago Law School, where he was a member of the Law Review, and a summa cum laude graduate of Pepperdine University, Seaver College. Mr. Loos is a member of the American and Illinois State bar associations.

Representative Matters

  • Represented the Refac Optical Group, a leading provider of vision care products and services, in the sale of one of its subsidiaries, Nationwide Optical Group, Inc., to Clarkson EyeCare Partners, Inc.
  • Represented Calumet Armature & Electric, LLC, an Illinois-based provider of design, manufacturing, assembly, and repair services of electric motors for the industrial and mass transit markets, in the sale of all its membership interests to a wholly-owned subsidiary of Integrated Electrical Services, Inc. (Nasdaq: IESC).

  • Represented a Chicago-based private equity fund in the sale of a Michigan headquartered benefits payments processing services company to an Ohio-based private equity firm.
  • Represented a manufacturer of boilers, generators and heaters in its sale to a private equity company.
  • Represented a full-service direct marketing firm headquartered in Oregon in its sale for approximately $20 million to two private equity firms.
  • Negotiated, documented and structured acquisitions and divestitures, including mergers, purchases/sales of stock and purchases/sales of assets.
  • Drafted and negotiated securities offerings, both public and private and have drafted and filed documents with the SEC, including registration statements and proxy materials.


  • Illinois
  • U.S. District Court for the Northern District of Illinois


  • University of Chicago Law School, J.D., high honors, 1998


  • Duane Morris LLP
    - Special Counsel, 2016-present
    - Associate, 2003-2016
  • Skadden, Arps, Slate, Meagher & Flom, Chicago, Illinois
    - Associate, 1998-2003

Professional Activities

  • American Bar Association
  • Illinois State Bar Association