Stephens Group LLC purchased acoustic noise control products-maker Sound Seal Inc. from Hamilton Robinson Capital Partners LLC.

Sound Seal will continue to operate as an independent company owned by members of its management team, which will remain in place, and with Stephens as the primary investor.

Stephens invests in U.S. companies specializing in industrial and commercial products and services, specialty distribution, business-to-business food and consumer products, technology infrastructure and technology-enabled services, among other markets.