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Key people at ACK Asset Management LLC.
Founded in 2005 by co-portfolio managers Richard S. Meisenberg and John Henry Reilly III, ACK Asset Management LLC is an investment adviser and hedge fund manager based in Greenwich, Connecticut. The firm employs a long/short equity strategy focused on small-cap and mid-cap stocks, seeking capital appreciation and absolute returns with strong capital preservation by analyzing broad economic outlooks and market catalysts. Operating with under ten employees, the organization manages four distinct hedge funds, including specific investment vehicles like the ACK Asset Master Fund LP and ACK Asset Partners II, LP. The firm oversees up to $2 billion in total assets under management and maintains a recently disclosed public equity portfolio value of approximately $796.7 million. Executive leadership includes Chief Financial Officer Kenneth Cooper, who helps oversee operations for institutional and high-net-worth clients.
ACK Asset Management LLC is a U.S.-based hedge fund and investment adviser established in 2005, headquartered in Greenwich, Connecticut, specializing in concentrated, research-driven long/short equity strategies focused on small- and mid-cap U.S. stocks.[1][2][5] The firm's mission centers on delivering significant capital appreciation and absolute returns with strong capital preservation through fundamental analysis, deep due diligence, and identification of mispriced securities amid market inefficiencies in the small- and mid-cap segments.[1][2] Its investment philosophy emphasizes robust risk management, monitoring macroeconomic trends for secular and cyclical opportunities, and targeting catalysts that drive earnings and free cash flow growth (or declines for shorts), primarily serving institutional clients and high-net-worth individuals via private funds like ACK Asset Partners.[1][2][3] While not directly impacting the startup ecosystem as a venture firm, ACK contributes indirectly through active equity investments in public small-cap companies, with recent 13F filings showing a $761M portfolio of 19 positions as of Q2 2025, including top holdings like ATS (7.73%), DY (7.21%), and GVA (6.69%).[1][4]
Founded in 2005, ACK Asset Management LLC was established by a lean team of experienced professionals with long careers specializing in small- and mid-cap sectors, leveraging their deep industry knowledge to exploit inefficiencies in this overlooked market segment.[1][2][3] Headquartered at 777 West Putnam Ave in Greenwich, CT, the firm registered as an SEC investment adviser (CRD #155136, CIK #0001510940) and has maintained a consistent focus on U.S. equities without major pivots, evolving into a specialist managing private funds through concentrated portfolios.[1][5][6] Key contacts include ckerr@ackasset.com, reflecting its streamlined operations with fewer than 25 employees and revenue under $5M.[2][5] Early emphasis on fundamental change and valuation has sustained its track record, as seen in steady 13F activity over two decades.[1][4]
ACK Asset Management rides the trend of small- and mid-cap resurgence, where market inefficiencies persist amid broader index dominance by mega-caps, allowing fundamental investors to uncover undervalued growth stories in industrial, tech-adjacent, and cyclical sectors (e.g., holdings in ATS Corp., ENS, DY—firms in automation, energy storage, and infrastructure).[1][2][4] Timing aligns with post-2022 small-cap rotations fueled by interest rate shifts and AI/industrial booms, positioning ACK to benefit from catalysts like earnings inflection points in underfollowed names.[2] Favorable market forces include regulatory scrutiny on passive investing and rising demand for active small-cap alpha, amplifying ACK's influence in reallocating capital to innovative public companies that fuel tech ecosystem expansion without direct venture involvement.[1][4]
ACK is poised for continued outperformance in a small-cap rebound, potentially expanding AUM beyond $761M through new institutional mandates amid volatile macro environments favoring its risk-managed long/short approach.[1][4] Trends like U.S. manufacturing onshoring, infrastructure spending, and sector rotations (e.g., into holdings like GVA and ENS) will shape its trajectory, with evolution toward even higher conviction in tech-enabled industrials.[2][4] Its influence may grow as small-caps regain appeal, reinforcing ACK's role as a specialist navigator in this high-opportunity arena—echoing its foundational edge in turning market blind spots into enduring returns.[1][2]
Key people at ACK Asset Management LLC.
