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JK&B Capital
David Kronfeld's JK&B Capital has deployed over $1.1B across five funds since 1996, backing enterprise software exits like Netezza and Sandisk from...
JK&B Capital
JK&B Capital was established in 1996 by David Kronfeld, a former Booz Allen Hamilton partner who brought a management-consulting discipline to venture investing. The firm raised its debut fund that year and has since closed five vintage vehicles, a cadence that spans the dot-com boom, the 2008 financial crisis, and the post-pandemic software reset. Kronfeld's operating background shaped a thesis-driven approach that targets companies where technology creates structural cost advantages — a posture formed well before 'enterprise SaaS' became a venture cliché. The firm invests across early-stage and expansion-stage rounds, concentrating on software, data infrastructure, and enabling hardware. Its portfolio history includes materially scaled exits: Netezza, the data warehouse appliance company, went public on NASDAQ in 2007 before IBM acquired it for $1.7 billion in 2010. Sandisk, an early flash-storage bet, listed on NASDAQ and was later acquired by Western Digital in a $19 billion transaction. The firm also backed Cognos, a business intelligence pioneer that IBM purchased for $5 billion in 2007, and Terremark Worldwide, a cloud infrastructure provider acquired by Verizon for $1.4 billion in 2011. Geographically, JK&B has deployed capital across North America and selectively in Israel, reflecting a network built from Chicago rather than the coastal venture corridors. Total deployment exceeds $1.1 billion per the firm's public record. JK&B has historically maintained a concentrated partnership structure, with Kronfeld as the primary investment-decision anchor. The firm does not publicly disclose its current fund size, but its most recent vehicle — Fund V — continued the established strategy of backing enterprise infrastructure and application software companies. In 2021, JK&B participated in the $50 million Series D for Aviatrix, a multi-cloud networking platform, and has maintained active board-level engagement across its surviving portfolio as the market shifted toward capital efficiency over growth-at-all-costs. JK&B's structural distinction lies in its longevity from a single Midwestern anchor — a 28-year franchise built outside Silicon Valley's churn, with the same investment committee leadership and a track record that links the pre-cloud software era to the current AI infrastructure cycle. The firm's ability to return capital across multiple cycles, without publicly resetting its strategy or rebranding, marks it as one of the longer-running independent software-focused venture platforms in Chicago.
General information
Firm type
Venture Capital
Year founded
1996
AUM
$1B - $5B (Altss estimate)
Location
Region
North America
Country
United States
City
Chicago
Corporate office
Chicago, IL, United States
Principals
David Kronfeld
Founder and Chairman
Sector focus
Frequently asked questions
Who runs investment decisions at JK&B Capital?
David Kronfeld, the firm's founder and Chairman, is the primary decision-maker and has led the firm's investment committee since 1996. His background as a partner at Booz Allen Hamilton informed the firm's thesis-driven approach to enterprise technology investing. The partnership structure remains concentrated, with Kronfeld as the central figure across all five fund vintages.
How does JK&B Capital source proprietary deal flow?
JK&B has historically sourced through Kronfeld's network of operating executives and portfolio-company alumni — a relationship-driven model built from Chicago rather than the auction-heavy coastal markets. The firm's 28-year track record and its role in exits like Netezza, Cognos, and Sandisk give it inbound access to founders building enterprise infrastructure and data-layer companies. Board-level relationships from prior cycles frequently generate repeat-founder and executive-led opportunities.
What investment stages does JK&B Capital typically target?
The firm invests across early-stage (Seed, Series A) and expansion-stage rounds, with a history of leading or co-leading institutional rounds in enterprise software, data infrastructure, and enabling hardware. JK&B does not publicly restrict itself to a single stage band — its portfolio includes companies backed at initial institutional entry as well as later-stage positions like its 2021 Aviatrix Series D participation.
Which sectors does JK&B Capital explicitly avoid?
JK&B has not published an explicit avoidance list, but its 28-year track record shows no material activity in consumer internet, biotech, or physical-hard-asset sectors. The firm's pattern is consistently enterprise-technology focused — software, data infrastructure, networking, and the hardware layers that enable those stacks. Founders in consumer-facing or capital-intensive non-software sectors are unlikely to fit the firm's mandate.
Is JK&B Capital structured as a single-GP firm, and what is the succession plan?
JK&B's partnership has historically centered on David Kronfeld as the managing and investment-committee anchor. The firm has not publicly disclosed a formal succession plan or a transition to a next-generation leadership group. For institutional allocators, the key risk is key-person concentration: the franchise's performance and sourcing have been closely tied to Kronfeld's tenure and network.
What are JK&B Capital's most notable realized exits?
Notable realized exits include Netezza (NASDAQ IPO 2007, acquired by IBM for $1.7 billion in 2010), Sandisk (NASDAQ, acquired by Western Digital for $19 billion in 2016), Cognos (acquired by IBM for $5 billion in 2007), and Terremark Worldwide (acquired by Verizon for $1.4 billion in 2011). These exits span data warehousing, flash storage, business intelligence, and cloud infrastructure — reflecting a multi-cycle enterprise technology thesis.
Does JK&B Capital participate in fund commitments or only direct deals?
JK&B operates as a direct venture capital investor, not as a fund-of-funds. All five of its vintage vehicles have been deployed into direct company equity positions. The firm has not publicly indicated participation in fund commitments or LP-stake acquisitions as part of its investment strategy.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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