PE Firm · Capital Allocator

American Securities

Medium
New York City, United States · Founded 1947 · AUM $26 billion · Website
Leveraged buyoutsPrivate equity fundsIndustrialsB2B ServicesHealthcareConsumerEnergyGovernment ServicesUnited StatesChina
Last verified
8/12/2026

Firm Overview

25
Portfolio tracked
6
Sectors
2
Regions
8/12/2026
Last verified

American Securities LLC is a New York-based private equity firm that partners with market-leading U.S. companies, primarily in the industrial and B2B services sectors.

American Securities was originally established in 1947 as a family office by William Rosenwald, the son of the longtime Sears CEO Julius Rosenwald, to manage the family's wealth. In 1994, under the leadership of Michael Fisch and Charles Klein, the firm transitioned from a family office into an institutionally backed private equity firm by launching its inaugural investment fund.

The firm focuses on partnering with U.S. companies that generate annual revenues between $200 million and $2 billion. Over several decades, American Securities has scaled significantly, growing from an initial fund of $71 million in 1993 to managing approximately $26 billion in funds by 2023.

Based in New York with an additional office in Shanghai, the firm primarily targets investments in the industrial and B2B services sectors. It has a history of rebranding, officially changing its name from American Securities Capital Partners to American Securities LLC in 2009.

Founded1947
HeadquartersNew York City, United States
AUM$26 billion
Target investment$200 million to $2 billion in annual revenue
Employees109,900 collective portfolio employees
StrategiesLeveraged buyouts, Private equity funds
Sector focusIndustrials, B2B Services, Healthcare, Consumer, Energy, Government Services
Geographic focusUnited States, China

Leadership

Michael G. Fisch
Founder and Managing Director
Prior to leading American Securities, he worked at Goldman Sachs and Bain & Company and served as the financial advisor to the William Rosenwald family.
Charles Klein
Co-Founder of inaugural private equity fund
William Rosenwald
Founder (1947)
Son of Sears CEO Julius Rosenwald, he established the firm originally as a family office.

Notable Investments

AmentumAspen DentalConairBelforEl Pollo LocoPotbelly Sandwich WorksLearning Care GroupHexionBlue BirdAir Methods

Historical and current deals referenced in public sources.

Portfolio Companies

Portfolio Web Readiness

Not yet assessed

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Sources

This profile is based on publicly available information and may be incomplete or outdated. PE Firm Index is not affiliated with American Securities and does not provide investment advice.

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