12075 N. Corporate Parkway, Suite 120 | Mequon, WI 53092
[email protected]

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Deal Room
Deal Room

Protanic Inc.

Our team advised Protanic on its sale to Stenstrom Petroleum Services.

Protanic Inc.

Transaction Details

Sell-Side Advisor

Year: 2021

Hedquarters: Saukville, WI

Client: Protanic Inc.

Industry: Business Services

Website: www.protanicinc.com

Overview

Completed by the Vantage Investment Banking team under a prior firm, Protanic, a provider of underground storage tank (UST) compliance testing services, has secured financing from CIBM Bank.

About Protanic

Based in Saukville, Wisconsin, Protanic is one of the oldest and most experienced providers of underground storage tank (UST) compliance testing services in the United States. Since its inception in 1972, Protanic has been growing its suite of compliance services encompassing tank, line & leak detector testing, corrosion protection testing, and containment testing, along with offering a variety of other industrial and commercial inspection services. Protanic is also viewed as an industry leader in providing operator training which has supported the continued growth of the Company’s brand across the petroleum industry and other sectors.

About Stenstrom Petroleum Services

Stenstrom Petroleum Services is a Midwest-based provider of petroleum system solutions, offering installation, maintenance, repair, environmental compliance/testing, and parts distribution for fuel stations and related facilities. Stenstrom Petroleum Services is part of the broader Stenstrom organization, a family-owned business with roots dating back to 1953, and serves customers across Illinois, Wisconsin, Indiana, Iowa, and beyond. With teams of experienced technicians, 24/7 emergency support, and fully stocked service vehicles, Stenstrom focuses on keeping fueling infrastructure safe, compliant, and operational. 

Deal Team

Vantage Investment Banking
Bill Penkwitz

Bill Penkwitz

Partner

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Built On Trust. Defined By Results.

We specialize in investment banking for privately held businesses, offering expert guidance and fresh perspectives. Contact us to learn more and explore your options.

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12075 N. Corporate Parkway, Suite 120 
Mequon, WI 53092
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Bill Penkwitz

Partner & Co-Founder

414-559-3519

[email protected]

Biography

Bill brings more than 25 years of investment banking experience, previously founding and building a boutique investment banking firm focused on advising middle market companies on mergers and acquisitions, debt placements, capital raising, and strategic advisory transactions. Over the course of his career, he has advised on more than 150 transactions across a wide range of industries. Bill remains active in the greater Milwaukee community, serving as a board member of several Wisconsin-based organizations and a shareholder in a number of privately held businesses.

Bill’s extensive experience gives him a unique perspective on both the advisory and operational sides of businesses, allowing him to provide thoughtful, senior-level guidance to business owners, management teams, and investors. Bill remains actively involved in all aspects of client engagements, ensuring each process benefits from his deep industry knowledge and leadership.

Prior to entering investment banking, Bill spent several years with U.S. Bank Capital Markets where he personally arranged over $200MM in structured finance transactions. Bill earned his Masters Degree in accounting and received a BBA in finance from the University of Wisconsin-Milwaukee and has passed the CPA exam.

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