ACK Asset Management

What ACK Asset Management does

ACK Asset Management LLC is a privately-held investment management firm headquartered at 777 West Putnam Avenue, 3rd Floor, Greenwich, Connecticut. Founded in 2005, the firm operates as a U.S. small-cap equity specialist, managing assets for institutional investors seeking exposure to smaller-capitalization U.S. companies. The firm positions itself as offering differentiated access to specialized small-cap investment expertise and portfolio diversification away from large-cap holdings.

The firm is a registered SEC 13F filer, with disclosed portfolio activity as of February 2026 including a new ~$39.99 million position in Rogers Corporation (NYSE:ROG) representing 5.0% of 13F AUM, a new ~$44.62 million position in Novanta representing 5.6% of 13F AUM, and the full liquidation of a JBT Marel Corporation position for ~$49.23 million. Implied 13F AUM is in the $750M-$900M range. The firm claims performance track record including a 25% gain on Rogers Corporation and a 30.3% gain on JBT Marel, with the latter outperforming the S&P 500 by 17.44 percentage points.

The business model is a traditional asset management fee structure on institutional mandates, distributed via direct institutional sales and relationship management from a single U.S. office. The firm is small (1-10 employees), privately held with no disclosed parent company, subsidiaries, partnerships, awards, or patent/trademark assets. No management team names, product suite beyond the small-cap equity strategy, geographic expansion, or technology/AI capabilities are disclosed in the available data.

Name

ACK Asset Management

Legal name

ACK Asset Management LLC

Website

https://ackasset.com

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

1–10 employees

Short description

ACK Asset Management LLC is a privately-held, Greenwich-based investment management firm specializing in U.S. small-cap equities for institutional investors, operating as an SEC 13F filer with implied AUM of roughly $750M-$900M.

Ownership category

akta.pro rank

Product category

Investment Management

NAICS

Portfolio Management and Investment Advice (523940)

SIC

Investment Advice (6282)

akta.pro primary industry

Small-Cap Equity (Active) (FSAAAIAC)

Keywords

• Small cap equities
• Investment management
• Institutional asset management
• Equity portfolio management
• U.S. small cap investing

Headquarters

HQ city

Greenwich

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Distribution channels1 record

Marketing channels1 record

Core offering

ACK Asset Management LLC provides institutional investment management services focused exclusively on U.S. small-cap equities. The firm constructs and actively manages small-cap equity portfolios for institutional clients, offering specialized exposure to smaller-capitalization U.S. companies with growth potential and diversification away from large-cap holdings. Operations are conducted from the firm's Greenwich, CT headquarters under SEC 13F regulatory disclosure requirements.

Product overview

ACK Asset Management LLC is a U.S. Small Cap Specialist investment management firm. The company offers investment management services focused on small-cap equities in the U.S. market. No specific named products, platforms, or modules are disclosed on the available source material.

Differentiator

Problem solved

Functional benefit

Products and services

• U.S. Small-Cap Equity Investment Management Actively managed U.S. small-cap equity portfolio service for institutional investors seeking specialized exposure to smaller-capitalization U.S. companies, diversification away from large-cap holdings, and access to emerging growth businesses. Includes security selection, portfolio construction, and ongoing portfolio oversight disclosed via SEC 13F filings.

Quantifiable outcome

• Shares up 25% over the past year (Rogers Corporation position)
• +1 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators3 records

Expansion highlights1 record

Direct peers

• Wasatch Global Investors: Boutique active manager specializing in U.S. small-cap and small/mid-cap growth equities, serving institutional and intermediary clients. Highly comparable to ACK in niche specialization, boutique structure, and small-cap mandate focus.
• Fred Alger Management: Active U.S. equity manager with a strong franchise in small-cap and small/mid-cap growth strategies for institutional and intermediary clients. Directly comparable product set and target investor base.
• Ariel Investments: U.S.-based active equity manager with deep roots in small/mid-cap value and growth strategies for institutional and individual investors. Directly comparable in active small-cap mandate focus and institutional distribution model.
• Segall Bryant & Hamill: Boutique active equity manager offering U.S. small-cap value and small/mid-cap strategies to institutional clients. Closely comparable boutique structure and small-cap equity product focus.
• Royce Investment Partners: Long-established U.S. small-cap equity specialist with a multi-decade track record managing small-cap portfolios for institutional and individual investors. Directly comparable to ACK in mandate focus (U.S. small-cap active equities) and client base.
• Emerald Advisers: Mid-Atlantic-based boutique manager focused on U.S. small/mid-cap equity strategies for institutional clients. Comparable to ACK as a specialist boutique running dedicated small-cap portfolios.
• Driehaus Capital Management: Boutique active manager specializing in U.S. small/mid-cap growth equities for institutional and high-net-worth investors. Comparable boutique structure, mandate focus, and client overlap.

Broad incumbents

• Lord Abbett: Large diversified U.S. asset manager offering active small-cap equity strategies among many other products. Comparable as a broad incumbent with overlapping small-cap capabilities serving institutional clients.
• Victory Capital: Multi-boutique asset manager with U.S. small-cap and small/mid-cap equity franchises alongside other strategies. Comparable as a broader incumbent in active U.S. equity.
• Calamos Asset Management: Established multi-strategy active manager with significant U.S. small/mid-cap and convertibles capabilities alongside other strategies. Comparable as a larger incumbent offering overlapping small-cap capabilities within a broader product suite.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat2 records

Key risks5 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ACK Asset Management